Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/init.php on line 48 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/init.php on line 48 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 143 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 147 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 148 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 28 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 30 Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 39 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 40 Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 41 Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 42 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 44 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 49 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 49 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 50 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 50 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/calendar.php on line 213 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 46 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 110 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 182 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/topnews.php on line 188 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/engine.php on line 146 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 101 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 229 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 229 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 233 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 233 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 374 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 447 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 447 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 447 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 447 Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/fastuser/data/www/yo31.ru/engine/modules/show.full.php on line 447 Warning: fopen(/var/www/fastuser/data/www/yo31.ru/engine/cache/related_676.tmp): failed to open stream: пФЛБЪБОП Ч ДПУФХРЕ in /var/www/fastuser/data/www/yo31.ru/engine/modules/functions.php on line 337 Warning: fwrite() expects parameter 1 to be resource, boolean given in /var/www/fastuser/data/www/yo31.ru/engine/modules/functions.php on line 338 Warning: fclose() expects parameter 1 to be resource, boolean given in /var/www/fastuser/data/www/yo31.ru/engine/modules/functions.php on line 339 Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. 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Станция Белгород - Расписание поездов » Железные дороги » Электроснабжение железных дорог » Системы тока и напряжения в контактной сети
 
 
Системы тока и напряжения в контактной сети
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Протяженность электрифицированных железных дорог СССР составляет более 43 тыс. км. Уровень напряжения на токоприемнике элект­роподвижного состава должен быть не менее 21 кВ при переменном то­ке, 2,7 кВ при постоянном токе и не более 29 кВ при переменном токе и 4 кВ при постоянном токе.
Тяговые подстанции на электрифицированных дорогах постоянного тока выполняют две основные функции — понижают напряжение под­водимого трехфазного тока и преобразуют его в постоянный ток. Для этой цели имеются трансформаторы, выпрямители и другое оборудова­ние. Широко применяют полупроводниковые выпрямители, которые обладают высокой надежностью работы, простотой устройства, обслу-живания и управления, компактностью и т. д. Все оборудование пере­менного тока размещают на открытых площадках тяговых подстан­ций, а выпрямители и вспомогательные агрегаты — в закрытых поме­щениях. От тяговых подстанций электроэнергию по питающим лини­ям подают в контактную сеть. Относительно низкое напряжение (3 кВ) является основным недостатком системы постоянного тока, вследствие чего по контактной сети к электроподвижному составу подводится мощность (равна произведению напряжения на ток) с большим тяговым током. Для поддержания нужного уровня напряжения на токо­приемниках локомотивов тяговые подстанции размещают близко друг от друга (20—25 км), а для передачи больших токов провода кон­тактной сети имеют значительное сечение.
Примерно 2/3 электрифицированных железнодорожных линий ра­ботают на постоянном токе. На этих линиях при росте грузооборота строят дополнительные тяговые подстанции, увеличивают сечение кон­тактной сети (подвешивают усиливающие провода и др.), чтобы повы­шение числа и массы поездов не вызывало резкого падения напряже­ния. При этом .происходит удорожание устройств электроснабжения и увеличение расхода материалов, особенно меди. Увеличение мощ­ности в контактной сети за счет значительного повышения напряже­ния постоянного тока требует изготовления и эксплуатации тяговых двигателей, рассчитанных на более высокое напряжение, что связано с большими трудностями (сильно усложняется изоляция электричес­кого оборудования, возникает опасность пробоя ионизированного слоя воздуха и др.).
Система однофазного тока с номинальным напряжением 25 кВ ши­роко применяется для тяги поездов на железных дорогах СССР. Пере­менный ток дает возможность значительно повысить технико-эконо­мические показатели электрической тяги благодаря тому, что по кон­тактной сети передается мощность при меньших токах по сравнению с системой постоянного тока, и обеспечивает движение тяжелых поездов с установленными скоростями при самой высокой грузонапряженности линий.
Тяговые подстанции на электрифицированных железных дорогах, работающих на однофазном переменном токе промышленной частоты, являются по существу трансформаторными подстанциями, понижаю­щими напряжение с 110—220 до 25 кВ. Поскольку на этих подстан­циях переменный ток не преобразуют в постоянный, то они не имеют выпрямительных агрегатов и связанного с ними вспомогательного обо­рудования. Их устройство и обслуживание значительно проще и де­шевле тяговых подстанций постоянного тока. Все оборудование таких подстанций размещено на открытых площадках.
Применение однофазного переменного тока высокого напряжения позволяет иметь контактную сеть примерно в 2 раза меньшего сече­ния, чем при постоянном токе, и размещать тяговые подстанции на расстоянии 40—60 км друг от друга. Это значительно снижает мате­риальные и денежные затраты на электрификацию железных дорог.
Повышение напряжения позволило бы уменьшить потери напряже­ния и электроэнергии и увеличить расстояние между тяговыми под­станциями, однако оно связано с большими затратами на усиление изоляции, замену электроподвижного состава и др. Для улучшения по­казателей электрификации на переменном токе разработана система 2х25 кВ с промежуточными автотрансформаторами, размещаемыми на расстоянии 8—15 км. От тяговых подстанций к автотрансформаторам электроэнергия подводится напряжением 50 кВ по контактной подвес­ке и дополнительному питающему проводу. Далее от автотрансформаторов к электроподвижному составу энергия подается напряжением 25 кВ. По такой системе предполагается электрификация западного участка БАМа. Важным преимуществом системы 2x25 кВ является снижение потерь напряжения и энергии, а также уменьшение влияния тяговой сети на линии связи, поскольку ток на тяговые подстанции возвращается не по рельсам, а по питающему проводу.
На участках переменного тока работают локомотивы со статичес­кими преобразователями и двигателями пульсирующего тока. Так же построены опытные образцы мощных электровозов с бесколлекторными двигателями — асинхронными и вентильными.
Переменный ток оказывает электромагнитное влияние на метал­лические сооружения и коммуникации, расположенные вдоль желез-подорожных путей. В результате на них наводится опасное напряже­ние, а в линиях связи и автоматики возникают помехи. Поэтому при­меняют особые меры защиты сооружений, а воздушные линии связи заменяют на кабельные или радиорелейные и реконструируют ав-томатику. На это расходуется около 20—25% общей стоимости элект­рификации.
Скорость движения поездов при электротяге находится в прямой зависимости от уровня напряжения в контактной сети. Имеются уст­ройства для автоматического регулирования напряжения и счетно-решающие машины для оптимизации режимов работы, что способст­вует повышению скоростей движения поездов и экономии электро­энергии.
Стыкование линий, электрифицированных на постоянном и пере­менном токе, осуществляют по контактной сети на специально обору-дованных железнодорожных станциях стыкования или используют электровозы двойного питания, которые работают и на постоянном, и на переменном токе.


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