基于前推回代法的城乡电能质量研究

Urban and Rural Power Quality Study Based on Forward Backward Substitution

潮流计算是分析城乡配电网的基础,通过潮流计算可以分析得到其具体的电压薄弱环节以及功率损耗为后续的改造提供依据。针对城乡配电网的呈辐射状的结构特征,采用前推回代法对电网进行潮流计算。基于直接形成的一维链式结构的分层数组集合,以支路的网损量为状态变量,给定首端电压后再反推求解各节点电压和功率损耗,以单相等值模型并忽略支路电导电纳参数。以张36线路为算例,观察计算得到的电压以及网损数据,分析得出该电网结构存在负载过重、电压偏低、损耗较大等一些列问题。

The calculation of the tidal current is the basis of the analysis of the distribution network. Through the calculation of the power flow, the specific voltage weak link and the power loss can be analyzed to provide the basis for the subsequent transformation. According to the structural characteristics of the distribution network, the power flow is calculated by the forward backward substitution. Based on the directly formed one-dimensional chain structure of the hierarchical array set to branch of the network loss as the state variable, given the first terminal voltage and then reverse the solution of the node voltage and power loss, single-phase equivalent model and Ignore branch conductance parameters. Taking the 36 lines as an example, the calculated voltage and the loss data are observed, and some problems such as overloading, low voltage and large loss are analyzed.