多馈入交直流系统无功补偿器变论域模糊PI控制算法

Variable Universe Fuzzy PI Control Algorithm for Reactive Power Compensator in Multi Infeed AC/DC Systems

电网中无功功率是保证供电质量的重要因素,无功补偿器作为无功功率的补偿装置,需始终保持良好的动态性能,研究多馈入交直流系统无功补偿器变论域模糊PI控制算法。分析多馈入交直流系统无功特性,构建无功补偿器导纳矩阵,以功率平衡为前提,选取电网稳定裕度指标,通过变论域解耦形式,设计模糊PI控制算法,实现无功补偿器的补偿控制。实验结果表明:在本文方法下对无功补偿器进行控制,能够对感性负载和容性负载侧的电压和电流进行有效补偿,且可以在感性与容性负载转换时,快速地完成动态响应,保证电网的平稳运行。

Reactive power in China is an important factor to ensure the quality of power supply.As a device for reactive power compensation,the reactive power compensator should always maintain a good dynamic performance,study the variable universe fuzzy PI control algorithm of reactive power compensator in multi infeed AC/DC systems.Analyzed the reactive power characteristics of multi infeed AC/DC system,constructed the admittance matrix of reactive power compensator,selected the grid stability margin index on the premise of power balance,designed a fuzzy PI control algorithm through variable universe decoupling form,and realized the compensation control of reactive power compensator.The experimental results show that the reactive power compensator can effectively compensate the voltage and current at the inductive load and capacitive load sides,and can quickly complete the dynamic response when the inductive and capacitive loads are converted,so as to ensure the smooth operation of the power grid.