不平衡、非线性负载电网的可控串联电压优化补偿策略研究

摘要

To protect sensitive unbalance nonlinear loads from supply voltage disturbance, energy storage device need output active power , that lead to high cost . With the principle of injected voltage is in quadrature with the load current, the paper proposeda algorithm based on basic synchronous-reference-frame theory, extracted the fundamental positive-reference component by extractor, The load current as the frame of reference to calculate the reference compensation voltage by using coordinate transformation . A capacitor-supported SVR does not need any active power because the injected voltage is in quadrature with the load current .Modeled in Matlab/Simulinkwith a hysteresis voltage controller regulate the load voltage to verify the effectiveness of the compensation strategy.%针对串联型电压调节装置（ SVR ）保护不平衡、非线性敏感负载免受电网电压扰动时，储能装置需要输出有功功率，导致装置成本过高的问题。论文基于补偿电压与负载电流正交的原理，提出用正序基波提取器提取出正序基波分量，在同步参考坐标系下，以负载电流为参考，利用坐标变换计算出参考补偿电压。由于补偿装置输出的电压正交于负载电流，因此储能装置为直流电容器的补偿装置运行时不需要任何有功功率。在Matlab/simulink 中建模，用电压滞环控制器控制逆变器输出需要的电压，调节负载电压，验证提出的补偿策略的有效性。