推荐答案3:由发电厂内的发电机、电力网内的各种输电线路和升降压变电所以及电力用户组成的统一整体推荐答案4:把这些生产,输送,分配和消费电能的各种电气设备连接在一起而组成的整体称为电力系统The production, transmission, distribution and consumption of various electrical equipment power connected together in the composition of the whole power system called推荐答案5:发、输、供、用四大部份.参考资料：电力系统继电保护
