基于快速分解算法的配电网供电能力恢复研究

Research on Restoration of Power Supply Capacity of Distribution Network Based on Fast Decomposition Algorithm

传统配电网供电恢复方法无法分析负增量阻抗特征,导致多电平换流过程出现振荡问题,供电输出功率较低。为此提出基于快速分解算法的配电网供电能力恢复方法。构建配电网供电的交流母线接口变换参数模型,控制交流频率与电压,实现分布交流电缆电压的补偿。结合负增量阻抗特征分析方法,抑制配电网供电振荡,采用快速分解算法对配电网供电异常参数快速分解,完成配电网供电能力恢复。仿真实验结果表明,所提配电网供电能力恢复方法的电能输出稳定性更好,供电输出功率增益较高。

The traditional power supply recovery method is unable to analyze the negative incremental impedance characteristics,which leads to the oscillation problem in the multilevel converter process and low power supply output.A power supply capacity recovery method based on fast decomposition algorithm is proposed.A parameter transformation model of the AC bus interface supplied by the distribution network is constructed to control the AC frequency and voltage and realize the voltage compensation of the distributed AC cable.Combined with the negative incremental impedance characteristic analysis method,the power supply oscillation of the distribution network is suppressed,and the abnormal power supply parameters of the distribution network are quickly decomposed by the fast decomposition algorithm to complete the power supply capacity recovery of the distribution network.The simulation results show that the power output stability and convergence of the proposed power supply capacity recovery method are better and the power output gain is higher.