基于功率平衡的微电网多逆变器并联电压控制

针对目前微电网多逆变器并联电压易受到谐波特性的影响，导致电压输出的稳定性较差、微电网多逆变器的稳态性和输出增益较低的问题，提出了基于功率平衡的微电网多逆变器并联电压控制方法。结合电容参数和电压参数的融合跟踪方法对微电网多逆变器并联谐波进行准确跟踪，对谐波进行功率平衡处理，提取功率平衡处理后逆变器并联电压的静态电压输出特征量；结合功率分配计算方案，建立并联电压的功率平衡状态模型，实现微电网多逆变器并联电压的优化控制。仿真结果表明，所提出的微电网多逆变器并联方法电压控制输出稳定性较好，提高了微电网多逆变器的稳态性和输出增益，具有较好的稳压性和传输控制能力。

Parallel Voltage Control of Multiple Inverters in Microgrid Based on Power Balance

At present, the parallel voltage of multiple inverters in microgrid is easily affected by harmonic charac-teristics, which leads to a poor stability of voltage output, a low stability and a low output gain of multiple inverters in microgrid. To solve this problem, a parallel voltage control method based on power balance for multiple inverters in microgrid is proposed. Combined with the fusion tracking method for capacitance and voltage parameters, the parallel har-monics of multiple inverters in microgrid are accurately tracked, and the harmonics are processed by power balance. The static voltage output characteristics of parallel voltage after the power balance processing are extracted. Combined with the calculation scheme for power allocation, a power balance state model of parallel voltage is established to realize the optimal control of parallel voltage of multiple inverters in microgrid. Simulation results show that the output stability under the proposed parallel voltage control is better, the stability and output gain of multiple inverters in microgrid are im-proved, and the voltage stability and transmission control capability are better.