基于潮流路径末端识别的解列面调整策略

Controlled Islanding Based on the Recognition of the Path End of Power Flow

针对解列面附近节点在解列之后出现的电压偏低,导致系统静态安全遭到破坏的问题,提出一种基于潮流路径末端识别的解列面调整策略。传统主动解列研究仅关注发电机同调性和孤网有功平衡,并未对节点电压导致的系统安全问题做针对性研究。与传统研究不同,作者在其基础上还考虑了节点电压导致的系统安全问题:一方面,通过理论推导证明该问题的根源在于解列后孤网的网络结构不合理,并总结出系统结构性变化对节点电压的影响及其规律;另一方面,结合该规律,提出了一种以潮流路径末端开断为原则的方法来调整解列面。算例结果表明:相比无功补偿方法和传统解列方法,所提出方法能够更大程度地改善解列后孤网的节点电压情况,从而提高解列后系统的静态安全性。

A controlled islanding method based on the recognition of the end of power flow path was proposed to solve the roblem of system insecurity caused by low voltage of system buses which are near the system partition surface.In addition,the problem caused by bus voltage was considered.The inappropriate network structure was demonstrated that it is the root of poor condition of bus voltage,and the relationship of structure change and bus voltage stability was summarized.On the other hand,to solve the bus voltage problem,an improved method with the principle of breaking path end of power flow was proposed.The result showed that,the proposed method performs better than reactive power compensation or traditional methods in improving the bus voltage condition after controlled islanding.In this way,static security of isolated power system can be promoted.