电压互感器谐波特性测量用可控谐波电压源的构建

Construction of controllable harmonic voltage source for harmonic characteristic measurement

谐波电压源的构建是开展电压互感器(Voltage Transformer,VT)谐波特性测量所需要解决的关键问题之一。为解决电压互感器谐波特性测量中要求谐波电压源容量大、谐波成分丰富且可控等问题,构建了以IGBT单相逆变器为核心的可控谐波电压源。分析了其工作原理、设计了系统参数并分析了控制器特性,仿真验证了所提方案的可行性。以此为基础构建了VT谐波特性测量平台并开展了输出性能测试,其输出结果进一步验证了所提方案的有效性,为VT谐波特性的测量及试验研究奠定了基础。

The building of harmonic voltage source is the one of key issues in harmonic characteristic measurement of voltage transformer. It is required to output large capacity and controllable harmonic components, but the existing harmonic sources cannot satisfy these requirements. To solve the problem, this paper refers the scheme of IGBT single-phase inverter as the core to build the controllable harmonic voltage source. The working principle of the controllable harmonic voltage source is introduced, the system parameters are designed and simulated and the characteristics of the controller are analyzed. The simulation results show the feasibility of the proposed scheme. On this basis, the VT harmonic characteristic measurement platform is built. The output results further verify the effectiveness of the scheme, which lay the foundation for harmonic characteristic measurement and test study of the voltage transformer.