一种多频点谐波电压控制器参数整定方法

A Parameter Setting Method for the Multi-Frequency Harmonic Voltage Controller

为了研究电力设备在电能质量干扰环境下的工作特性,检验设备运行的可靠性,搭建一套基于电力电子变流器的模拟试验系统。在谐波电压模拟测试环境,需要电力电子变流器输出多个频点的谐波电压,对一种等效单相旋转坐标变换的多频点电压控制策略进行详细分析并提出了参数整定方法。首先对控制器进行建模,采用基于伯德图的控制器分析方法研究控制器特性;接着对逆变器主电路进行建模,分析控制器参数对控制性能的影响;最后提出了一种控制参数整定方法。仿真及试验验证了整定方法的可行性,可以实现单相多频点谐波电压的无差控制。

A simulation test system based on the power electronic converter was built in order to study the operating characteristics of power equipment under power quality interference and to verify the reliability of equipment operation.In the harmonic voltage simulation test environment,the power electronic converter is required to give harmonic voltage at multiple frequencies.A multi-frequency voltage control strategy,equivalent to single-phase rotating coordinate transformation,was analyzed in detail,and a parameter setting method was presented.Firstly,the controller was modelled and its characters were studied in the controller analysis approach based on the Bode diagram.Then,the main circuit of the inverter was modelled,and the influence of controller parameters on the control performance was analyzed.Finally,a parameter setting method was proposed.Simulation and experimental results verified that proposed setting method was feasible,and no-difference control could be realized for single-phase multi-frequency harmonic voltage.