“一厂三网”防非同期并列一、二次回路的改造

Improvement of the First and Second Electric Circuit to Avoid Unsyncronized Step Juxtaposition with One Plant Three Networks

着重阐述娘子关发电厂２号、３号、４号机组向河北送电时，由于山西同与河北网不能长期 在娘子关电厂合环运行，为了防止非同期并列，小系统合环，而对电气一、二次回路所做的防范 措施和技术改造以及建议性的改造方案。

Shanxi electric power network can't run in closed-loop mode with Hebei electric power network in Niangziguan Power Plant for a long time. When No' 2, 3, 4 units in the power plant is in operation to send electricity to Heibei network, unsyncronized step juxtaposition might happen. In order to avoid this fault and the small system in-step operation, prevention measures and improvement scheme are proposed for the first and second circuit.