The tie line bias control for North China interconnected power System is investigated, the mathematical model for North China power System is proposed.
本文对华北互联电力系统联络线交换功率偏移制方式进行了研究，提出了相应的数学模型。
Two extra and ultra power system in the western and eastern parts of North America are similar to future China national power system, so their experience and lessons are more useful to us.
北美东、西部两个特大型和超大型电力系统从多方面都和中国未来全国电力系统相近，故其经验和教训皆具参考价值。
Design and implementation of North China Grid integral power telemeter and settlement system is proposed.
设计和实现了华北电网一体化电能量计量计费系统。
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