含小水电配网负荷模型实用化方法

A practical method for determining parameters of load model of distributed network with small hydro power

以含分布式电源的配网为主要研究对象,系统研究了分布式小水电的工作原理与运行特性,通过对湖南郴州小水电网络的调查,利用PSASP仿真软件构建了相应的含分布式小水电的仿真网络。分析了10kV小水电并网方式及动态响应特性,研究了小水电电源对配网侧综合负荷特性影响。在此研究基础上,采用加权平均聚合的归纳算法以及利用实际电网运营信息,对考虑配网的分布式小水电系统进行综合等效建模,并确定模型参数。从模型等效功角特性及功率外特性的角度,验证了所提等效模型及参数确定方法的合理性和实用性。

This paper takes the distributed network with small hydro power as research subject and the operating characteristics were studied. The typical lOkV small hydro simulation network of Chenzhou power grid in Hunan province was constructed in PSASP simulation environment, and the grid-connection style and the influence on the characteristic of the Synthesis load modeling of the distribution network were analysed. On this basis, in order to find a better model to apply to this kind of distributed network, the weighted aggregation method was applied to get the parameters of generator of the equivalent small hydropower network model. And the operation information of the actual grid was used to determine the equivalent impedance of distribution network. The results showed that, the equivalent method can well reflect the dynamic characteristic of the hydropower,and the method has high accuracy, strong practicability and strong feasibility on the research of the actual small hydropower system.