考虑电网潮流分布的输电线路动态参数估计方法

Dynamic parameter estimation method of transmission line considering power flow distribution

随着广域量测系统在电网的应用普及,电力系统量测数据冗余,历史数据越加充足,利用大数据对电网进行动态监测,实时监测与动态分析已成为电力工程研究的热点之一。基于电网量测数据提出一种输电线路动态参数辨识方法。该方法依据电网量测数据,模拟调度功率平衡控制思想,采用优化潮流的计算方法,预测电力网络潮流分布,利用回路新息相角估计电力网络参数偏差,辨识实时动态的支路参数值,并与运行环境进行拟合验证。通过算例验证,该方法能够比较快速准确地获取电网动态参数值,提高参数估计准确度。

With the popularization of wide-area measurement system in power grid,the power system measurement data is redundancy and the historical data is more abundant.Dynamic monitoring of power grid,real-time monitoring and dynamic analysis by using large data becomes one of the hotspot in power engineering research.A dynamic parameter identification method for transmission lines based on the power grid measurement data is proposed.The method is based on the power grid measurement data,simulates the power balance control idea,uses the dynamic power flow calculation method,predicts the power network flow distribution,uses the loop new phase angle to estimate the power network parameter deviation,identifies the real-time dynamic branch parameter value,and validates with the running environment.The calculation example verifies that this method can obtain the dynamic parameter value of power network quickly and accurately,and improves the accuracy of parameter estimation.