基于双重故障模式的微型电网电压自愈控制方法研究

Research on Voltage Self-healing Control Method for Microgrid Based on Double Fault Modes

针对故障干扰容易造成电网负荷损失的问题与负荷裕度较小且分布不均等问题,提出双重故障模式的微型电网电压自愈控制系统等效处理微型电网运行模式。通过有向图路径矩阵及其关联矩阵确定供电路径计算传输功率,构建网络故障关联与拓扑矩阵然后对双重故障形成关联,实现负荷裕度损失较小的条件下进行微型电网电压自愈控制的目的。实验表明,故障检测过程中负荷裕度提升值较高且分布均匀,紧急负荷补偿能力较高,故障定位下的微型电网负荷性能得到提升且具有良好的稳定性。

Aimed at problems such as load loss caused by fault disturbance and the small and unevenly distributed load margin,a voltage self-healing control system in double fault modes is proposed to deal with the operation mode of microgrid equivalently.In this paper,the power supply path is determined by a directed graph path matrix and its correlation matrix to calculate the transmission power.Then,the network fault correlation and topology matrix is constructed,and the double faults are associated to realize the purpose of voltage self-healing control of microgrid under the condition of less load margin loss.Experimental results show that the values of load margin improvement was higher and the load margin was evenly distributed in the process of fault detection.In addition,the emergency load compensation capability was high,and the load performance of microgrid under fault location was improved while a satisfying stability was maintained.