弱电网下多逆变器并联系统的电容电压前馈谐振抑制策略OA
Capacitor voltage feedforward resonance suppression strategy for multi-inverter parallel system under weak grid
在弱电网环境下,多台逆变器并联运行时,逆变器与电网以及逆变器之间的耦合作用都显著增强,从而产生谐振,威胁电网的安全稳定运行.针对该问题,提出了一种针对弱电网下多逆变器并联系统的改进电容电压前馈谐振抑制策略.首先解析了单台逆变器的控制原理,基于此构建了其诺顿等效模型并分析了多逆变器并联时的谐振特性,其次对比传统的电网电压前馈和并网电流前馈策略提出了改进的电容电压陷波器前馈谐振抑制策略,并结合牛顿优化算法提高了并网功率变化及逆变器并联台数变化时系统的鲁棒性,最后,利用硬件在环(Hardware-in-the-Loop,HiL)平台搭建多机并联系统的仿真模型验证了所提谐振抑制策略的有效性.
In a weak grid environment,when multiple inverters are operated in parallel,the coupling effects between the inverters and the grid,as well as between the inverters themselves,are significantly enhanced,leading to the occurrence of resonance and threatening the safe and stable operation of the grid.To address this issue,an improved capacitor voltage feedforward resonance suppression strategy for a multi-inverter parallel system in a weak grid is proposed.Firstly,the control principle of a single inverter is analyzed,and its Norton equivalent model is constructed to analyze the resonance characteristics of the multi-inverter parallel system.Then,compared with the traditional grid voltage feedforward and grid-connected current feedforward strategies,an improved capacitor voltage notch filter feedforward resonance suppression strategy is proposed.Combined with the Newton optimization algorithm,the robustness of the system is improved during changes in grid-connected power and the number of parallel inverters.Finally,a simulation model of the multi-machine parallel system is built on a Hardware-in-the-loop(HiL)platform to verify the effectiveness of the proposed resonance suppression strategy.
刘梦洁;何顺帆;段启豪;李康锐;陈祥方;陈衡瑜
中南民族大学 计算机学院,武汉 430074中南民族大学 计算机学院,武汉 430074中南民族大学 计算机学院,武汉 430074中南民族大学 计算机学院,武汉 430074中南民族大学 计算机学院,武汉 430074中南民族大学 计算机学院,武汉 430074
信息技术与安全科学
并网逆变器并联谐振抑制电容电压反馈
grid-connected inverter parallel operationresonance suppressioncapacitor voltage feedback
《中南民族大学学报（自然科学版）》 2026 (3)
401-411,11
国家自然科学基金资助项目(61903384)
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