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5. 基于虚拟阻抗的多逆变器并联运行控制策略研究

基于虚拟阻抗的多逆变器并联运行控制策略研究

来源 :东北电力技术 | 被引量 : 0次 | 上传用户：utpaxiao

【摘 要】

：

考虑到低压微电网中多逆变器并联运行时功率合理分配和环流抑制的问题,提出了一种基于虚拟阻抗的多逆变器并联运行控制策略.由于逆变器的等效输出阻抗存在较大的差异,通过引入虚拟阻抗使得逆变器的系统输出阻抗呈可调节的感性,降低了线路电阻引起的功率耦合,并改善了各逆变器输出电压质量.在此基础上通过改进逆变器的功率下垂控制策略,实现了并联逆变器之间较高的功率分配精度和良好的动态响应能力,抑制了并联逆变器之间的环流.最后,在Matlab/Simulink环境下构建多逆变器并联系统模型,分析了多逆变器并联运行特性,仿真结果

【作 者】

：

涂其华 周志钢 程凡华 李灵 

【机 构】

：

国网潜江市供电公司,湖北 潜江 433100

【出 处】

：

东北电力技术

【发表日期】

：

2022年1期

【关键词】

：

逆变器 虚拟阻抗 下垂控制 功率合理分配 环流抑制 

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论文部分内容阅读

考虑到低压微电网中多逆变器并联运行时功率合理分配和环流抑制的问题,提出了一种基于虚拟阻抗的多逆变器并联运行控制策略.由于逆变器的等效输出阻抗存在较大的差异,通过引入虚拟阻抗使得逆变器的系统输出阻抗呈可调节的感性,降低了线路电阻引起的功率耦合,并改善了各逆变器输出电压质量.在此基础上通过改进逆变器的功率下垂控制策略,实现了并联逆变器之间较高的功率分配精度和良好的动态响应能力,抑制了并联逆变器之间的环流.最后,在Matlab/Simulink环境下构建多逆变器并联系统模型,分析了多逆变器并联运行特性,仿真结果验证了所提控制策略的正确性和有效性.

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