MMC injection strategy optimization and performance evaluation method and system for detection type protection

The invention discloses a detection type protection-oriented MMC injection strategy optimization and performance evaluation method and system. The method comprises the following steps of: establishing a mathematical model of an MMC direct current system control part; deducing a mathematical model of an MMC direct current system response part based on the mathematical model in combination with the topological structure; based on the established MMC direct current system mathematical model, deriving a transfer function when a detection signal is injected; performing injection strategy performance optimization based on the transfer function; performing quantitative evaluation on the optimized injection strategy based on the injection precision and the alternating current side current distortion rate; the optimized injection strategy has higher detection signal injection precision and smaller negative influence on a power grid. 本发明公开了一种面向探测式保护的MMC注入策略优化及性能评估方法及系统，建立MMC直流系统控制部分的数学模型；基于数学模型，结合拓扑结构，推导MMC直流系统响应部分的数学模