电能路由器中压交流端口多形态的多维解耦控制

电能路由器(electric energy router,EER)的中压交流端口(medium-voltage AC,MVAC)连接10kV交流电网，要求同时兼顾有功跟随、无功补偿和有源滤波等多种功能形态，而多形态的控制存在强耦合的特点。该文采用功率和电流两个维度的分析方法，在规律分析中实现多形态的解耦和控制。从功率的维度，在dq坐标系下对瞬时有功功率进行分解，获得三相有功功率的分布规律，通过注入负序电流和对三相有功偏差的调节，解决三相有功不平衡的控制问题。从电流的维度，提出在正序dq坐标系下对基波正序和高次谐波构成的统一分量进行调节、在负序dq坐标系下对基波负序分量进行调节的控制方案，通过合理组合不同中心频率的陷波滤波器(notchfilter,NF)并用于控制回路中实现对电压、电流的解耦和准确提取，采用PI+矢量PI(vector proportional integral,VPI)调节器对基波正序和高次谐波构成的统一电流分量进行控制，有效补偿了被控对象造成的相位偏移影响，实现了对高次谐波电流的跟踪。该文还从系统的稳态和动态性能出发，对各控制环节的参数进行了详细设计，最后通过等比降...

Decoupling Control Strategy for Multi-function-form Realization of Medium-voltage AC Port of Electric Energy Router

The medium voltage AC port(MVAC)of electric energy router(EER)requires multiple functional forms such as active power following,reactive power compensation and active filtering,and the multi-form control has strong coupling characteristics.In this paper,two-dimensional analysis of power and current were used.From the power dimension,the instantaneous active power is decomposed under the dq frames.By injecting negative-sequence current and adjusting the active power deviation,the imbalance control problem was solved.From the current dimension,a control scheme was proposed to adjust the unified component of fundamental positive-sequence and higher harmonics in the positive-sequence dq frame,and to adjust the fundamental negative-sequence component in the negative-sequence dq frame.The notch filter(NF)of different center frequencies is reasonably combined to achieve accurate extraction of voltage and current.The“proportional integral(PI)+vector PI(VPI)”regulator was used for fundamental positive-sequence and high-order harmonics.In addition,the parameter design process of each control link was elaborated.Finally,experiments performed on the laboratory prototype verified the effectiveness of the proposed control strategy and the correctness of the parameter design.