面向主动探测式保护的变流器正交控制策略

为避免主动探测式保护的变流器附加控制策略与原有基础控制策略之间相互干扰，提出了一种正交控制的方法。首先分析了新型电力系统中变流器的基础控制策略，针对空间矢量脉宽调制采用正序分量计算空间矢量的特点，设计了基于负序分量的附加控制策略，保证基础控制系统、附加控制系统相互解耦。其次利用基础和附加控制策略处理后的不同信号频带，引入前置滤波环节，给出了常规应用场景下的正交控制策略；然后研究了脉冲信号的生成方式，分析了附加控制策略的适用场景；最后分析了探测信号生成对一次系统和传统保护的影响。

Orthogonal control strategy of converter for active detection protection

To avoid interference between the additional control strategy of active detection protection and the original basic control strategy of the converter, an orthogonal control method is proposed. The basic control strategy of the converter in the new power system is analyzed. Based on the characteristics of space vector pulse width modulation using positive-sequence components to calculate space vectors, an additional control strategy based on negative-sequence components is designed to ensure mutual decoupling between basic control system and additional control system. By using the different signal frequency bands processed by the basic and additional control strategies, a pre-filtering link is introduced, and an orthogonal control strategy for conventional application scenarios is proposed. Then, the generation method of pulse signals is studied, and the applicable scenarios of the additional control strategy are analyzed. The impact of detection signal generation on primary system and traditional protection is analyzed.