基于发电机及负荷动态无功响应的受端电网最小开机顺序方法

Minimum Start-up Sequence Method of Receiving Terminal Based on Generator and Load Dynamic Reactive Power Response

基于发电机及负荷的动态无功响应,提出一种最小开机顺序方法。首先确定受端电网的重负荷区域,搜索严重故障,找到相关薄弱节点;其次通过计算发电机与薄弱节点的电气距离和发电机动态无功响应两个基本量化指标,得出各发电机对电压稳定的综合效果量化指标,以此确定各发电机的开机顺序;最后按照该开机顺序控制各发电机开机或者停机,同时检测薄弱节点的稳定状态,当薄弱节点达到临界稳定时,各发电机的实际开机顺序即为最小开机顺序。

A method of minimum start-up sequence is proposed in this paper based on the dynamic reactive power of generator and load. Firstly, the heavy load area of the receiving network is determined and the serious faults are searched to find the weak nodes. Secondly, two basic quantitative index are calculated, which are electrical distance between the generator and weak node ＆ generator reactive power response, to get the quantitative index of the comprehensive effect of generator voltage stability in order to determine the boot sequence generator. Finally, each generator startup or shutdown is controlled according to the sequence and the stable state of weak nodes is checked at the same time. The actual generator boot sequence is the minimum boot order when weak nodes reach the critical stable.