双频并网逆变器弱网稳定性研究  

Research on Weak Grid Stability of Dual-frequency Grid-connected Inverter

作　　者：杨立永[1] 王铭杰 YANG Li-yong;WANG Ming-jie(School of Electrical and Control Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学,电气与控制工程学院,北京100144

出　　处：《电力电子技术》2025年第4期23-26,共4页Power Electronics

基　　金：国家自然科学基金(51807001)。

摘　　要：为了抑制电流纹波,提出了一种双频并网逆变器,验证这种双频并网逆变器不需要复杂的参数配置就能够在弱电网的工况下稳定运行,对该并网逆变器进行数学建模,并根据并网逆变器的数学模型推导基于阻抗的稳定判据。经过数学推导证明,该并网逆变器在弱电网环境下对电流纹波依然有较好的抑制效果,并不会失稳导致失去抑制电流纹波的能力。最后,制作了实验样机,证明理论推导的正确性。In order to block the current ripple,a dual-frequency grid-connected inverter is proposed.It is verified that this dual-frequency grid-connected inverter can operate stably under weak grid conditions without complex parameter configuration.The grid-connected forecaster is mathematically modeled,and the impedance-based stability criterion is derived based on the mathematical model of the grid-connected forecaster.Mathematical derivation proves that the grid-connected forecaster still has a good suppression effect on current ripples in a weak grid environment,and will not become unstable and lose its current ripple capability.Finally,an experimental prototype is produced to prove the cor-rectness of the theoretical derivation.

关 键 词：并网逆变器 弱电网 稳定性 

分 类 号：TM464[电气工程—电器]