计及多种扰动源的有源配电网电能质量分析方法

Power Quality Analysis for Active Distribution Network Considering Multiple Disturbance Sources

随着波动性负荷的增多和分布式电源的接入,有源配电网的扰动源增加,电能质量问题涉及更多不确定性因素,使得传统的基于确定监测值的电能质量分析方法不再适用。提出了一种基于区间-仿射算法的有源配电网电能质量分析方法,利用潮流计算得到仿射型电能质量指标,建立相对影响因子定量分析各扰动源对电能质量的影响程度,并以IEEE 33节点配电网为例验证该方法有效性,仿真结果表明所提方法在特定场景下能够定量计算不同扰动源的波动对配电网电能质量的影响程度大小。

With the increase of volatility loads and the access of distributed generators,there are more and more different disturbance sources in the active distribution network.So the power quality problems involve more uncertainties,making the traditional analysis methods based on determined monitoring values no longer applicable.This paper proposes an energy-quality analysis for active distribution network based on interval-affine algorithm.The affine power quality index is obtained by power flow calculation,and the relative influence factors are established to quantitatively analyze the impact of disturbance sources on power quality.The effectiveness of the method is verified with the example of IEEE33-bus distribution network.The simulation results show that the proposed method can quantitatively calculate the impact of the fluctuation of different disturbance sources on the power quality of distribution network.