计及负荷电压静特性的有源配电网线性潮流计算

Linear Power Flow Calculation of Active Distribution Network Considering Static Characteristics of Load Voltage

为了响应配电网快速分析和实时优化的需求,提出了一种基于直角坐标系下的潮流方程考虑负荷电压静特性的有源配电网线性潮流计算方法。在考虑负荷电压静特性和分布式电源DG的基础上,将恒功率负荷和DG模型表示为节点电压相关的二次函数,并通过曲线拟合技术得到函数各系数的最佳取值,最终实现潮流方程的线性化处理。所提方法兼顾了对弱环网的适应性,能够在不需要迭代的情况下实现对潮流模型的高精度逼近。仿真结果验证了所提方法的有效性。

In order to respond to the demand of rapid analysis and real-time optimization of distribution networks,the paper proposes a linear power flow calculation method based on the power flow equation in rectangular coordinate system and load voltage static characteristics.On the basis of considering the load voltage static characteristics and distributed generation(DG),the constant power load and DG model is expressed as the quadratic function of node voltage correlation,and the optimal value of each coefficient of the function is obtained through curve fitting,finally realizing the linearization of the power flow equation.The proposed method takes into account the adaptability of weak loop network and can implement high precision approach to the power flow model without iteration.The simulation results verify the effectiveness of the proposed method.