虚拟同步机逆变器等效方式及滤波电路影响分析
发布时间：2018-08-11 12:00
【摘要】：基于逆变器的虚拟同步机(virtual synchronous generator,VSG)特性不但取决于控制策略,而且其等效方式及滤波电路对VSG动稳态行为与模型准确性的影响也是不可忽略的.本文重点对LCL滤波电路下不同等效方式的VSG特性进行了分析对比,并发现将包含LCL滤波电路整体的VSG逆变器完全等效为同步发电机(synchronous generators,SG)建立的模型存在误差,进而提出一种VSG逆变器准确建模的等效方法,通过该方法建立的模型在瞬态和稳态响应均可以与实际系统一致.仿真结果及其对比分析验证了所提方法的正确性和有效性.
[Abstract]:The characteristics of (virtual synchronous generator based on inverter not only depend on the control strategy, but also the effects of its equivalent mode and filter circuit on the dynamic steady-state behavior of VSG and the accuracy of the model can not be ignored. This paper focuses on the analysis and comparison of the VSG characteristics of different equivalent modes in the LCL filter circuit, and finds that there are errors in the model that the VSG inverter, which includes the whole LCL filter circuit, is completely equivalent to the synchronous generator (SG). Then an equivalent method for accurate modeling of VSG inverter is proposed. The model established by this method can be consistent with the actual system in both transient and steady state response. The simulation results and comparative analysis show that the proposed method is correct and effective.
【作者单位】： 合肥工业大学教育部光伏系统工程研究中心;
【基金】：台达环境与教育基金会“电力电子科教发展计划”重大项目(DREM2015002) 国家自然科学基金项目(51307042,51407057)资助~~
【分类号】：TM464
，
本文编号：2176933
[Abstract]:The characteristics of (virtual synchronous generator based on inverter not only depend on the control strategy, but also the effects of its equivalent mode and filter circuit on the dynamic steady-state behavior of VSG and the accuracy of the model can not be ignored. This paper focuses on the analysis and comparison of the VSG characteristics of different equivalent modes in the LCL filter circuit, and finds that there are errors in the model that the VSG inverter, which includes the whole LCL filter circuit, is completely equivalent to the synchronous generator (SG). Then an equivalent method for accurate modeling of VSG inverter is proposed. The model established by this method can be consistent with the actual system in both transient and steady state response. The simulation results and comparative analysis show that the proposed method is correct and effective.
【作者单位】： 合肥工业大学教育部光伏系统工程研究中心;
【基金】：台达环境与教育基金会“电力电子科教发展计划”重大项目(DREM2015002) 国家自然科学基金项目(51307042,51407057)资助~~
【分类号】：TM464
，
本文编号：2176933
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