并联逆变器的自适应无功均分的改进虚拟阻抗策略OA
Improved Virtual Impedance Strategy for Adaptive Reactive Power Equalisation in Shunt Inverters
针对孤岛微电网中的并联逆变器无功均分问题和母线压降问题,提出了一种具有自适应无功均分和母线电压补偿功能的改进虚拟阻抗策略.通过引入基于广义二阶积分器(SOGI)的增强型功率解耦策略,解决了非线性负载下的谐波虚拟压降问题,并改善了PI控制器的追踪效果.然后,通过自适应虚拟压降修正项,消除线路阻抗的影响,并提出了虚拟压降修正系数的选取方法.最后,通过仿真验证了所提策略的有效性,显示其在复杂工况下具有较好的无功均分精度和母线电压补偿效果.
An improved virtual impedance strategy with adaptive reactive power equalisation and bus voltage compensation functions was proposed to address the reactive power equalisation and bus voltage drop issues in parallel inverters in island microgrids.By introducing an enhanced power decoupling strategy based on a second-order generalized integrator(SOGI),the harmonic virtual voltage drop problem under nonlinear loads was solved,and the tracking performance of the PI controller was improved.Then,an adaptive virtual voltage drop correction term was introduced to eliminate the influence of line impedance,and a method for selecting the virtual voltage drop correction coefficient was proposed.Finally,the effectiveness of the proposed strategy was verified through simulations,demonstrating improved reactive power equalisation precision and bus voltage compensation in complex operating conditions.
冯侃;张乐桢;周龙;侯焱伦;牛炜;保承家
国网甘肃省电力公司白银供电公司,甘肃 白银 730900国网甘肃省电力公司白银供电公司,甘肃 白银 730900国网甘肃省电力公司白银供电公司,甘肃 白银 730900国网甘肃省电力公司白银供电公司,甘肃 白银 730900国网甘肃省电力公司,甘肃 兰州 730030国网甘肃省电力公司,甘肃 兰州 730030
信息技术与安全科学
并联逆变器虚拟阻抗无功均分电压补偿
shunt invertervirtual impedancereactive power equalisationvoltage compensation
《电气传动》 2026 (1)
21-30,40,11
国家电网有限公司科技项目(522703230009)国家自然科学基金(U24A20148)
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