特高压换流站调相机系统控制策略分析

Control Strategy Analysis of the Synchronous Condenser in UHV Converter Station

首先介绍了特高压换流站调相机工程的主要作用、数学模型及运行特性,分析了调相机SFC系统、启动励磁和主励磁系统的工作原理及控制策略。其次概括了调相机并网启动流程,分析了并网启动过程中SFC、启动励磁和主励磁系统之间配合过程,针对调相机并网运行特性,分析了调相机并网运行时无功控制策略与原理。最后结合调相机并网调试期间波形与录波文件,验证了调相机控制策略的可行性和准确性。通过分析特高压换流站调相机系统控制策略,有利于掌握调相机启动逻辑与运行特性,保证区域电网安全稳定运行。

Firstly,the main functions,mathematical models and operating characteristics of the Synchronous Condenser in UHV Converter Station are introduced.The operation principle and control strategy of SFC system and excitation system are analyzed.Then,the grid-connected process is summarized,the coordination process between SFC and excitation system is analyzed.According to the grid-connected operation characteristics of the SC,the reactive power control strategy and principle during the grid-connected operation of the SC are analyzed.Finally,the feasibility and accuracy of the control strategy of the SC are verified by combining the grid-connected debugging waveform and recording file of SC.By analyzing the control strategy of the phase control system of the UHV converter station,it is beneficial to grasp the start-up logic and operation characteristics of the phase switch and ensure the safe and stable operation of the regional power grid.