基于模糊控制的电网动态无功控制技术研究

Dynamic Reactive Power Control Technology of Power Network Based on Fuzzy Control

无功补偿是优化电能质量、提高功率因数、控制电力系统稳定运行的重要手段。针对电网无功功率集中补偿问题进行研究,考虑降低设备成本、提高动态补偿性能,并保障其运行可靠性,提出采用磁能再生开关(M ERS)技术对电网无功进行优化控制的方案。同时为了增强磁能再生开关的动态补偿效果,减小扰动量,使用模糊参数优化控制策略,对目标功率进行调节优化,降低直流电容电压,减少谐波含量。最后通过搭建仿真和试验平台进行验证,结果表明该方案具有低成本、补偿精度高、响应速度快及运行稳定等优点。

Reactive power compensation is an important means to optimize power quality,improve power factor and control the stable operation of power systems.The problem of centralized compensation of reactive power in power grid is studied.Considering reducing equipment cost,improving dynamic compensation performance and ensuring its operational reliability,it is proposed to use magnetic energy recovery switch(MERS)technology to optimize power grid reactive power.At the same time,in order to enhance the dynamic compensation effect of the magnetic energy regeneration switch,reduce the disturbance amount,the fuzzy parameter optimization control strategy is used to adjust and optimize the target power,reduce the DC side capacitor voltage and reduce the harmonic content.Finally,verification is carried out by building a simulation and experimental platform.The research results show that the scheme has the advantages of low cost,high compensation accuracy,fast response and stable operation.