电工技术学报  2016, Vol. 31 Issue (23): 199-210    DOI:
电力电子与电力传动 |
孤岛模式下逆变器并联系统的谐振特性分析及其抑制策略研究
姚 骏, 谭 义, 杜红彪 ,郭利莎 ,曾 欣
输配电装备及系统安全与新技术国家重点实验室重庆大学 重庆 400044
Analysis of Resonant Characteristics and Resonance Suppression Strategy of Inverter Parallel System in Islanding Mode
Yao Jun, Tan Yi, Du Hongbiao, Guo Lisha, Zeng Xin
State Key Laboratory of Power Transmission Equipment System Security and New TechnologyChongqing University Chongqing 400044 China
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摘要 针对孤岛模式下逆变器并联系统的谐振问题,首先建立考虑数字控制延时以及数字滤波等非线性因素的单台逆变器系统等效模型,并由此扩展得到孤岛模式下多逆变器并联系统的等效模型。进一步提出利用孤岛模式下逆变器并联系统的等效导纳进行系统的谐振特性分析,分析结果表明多逆变器之间谐波交互可能引发系统谐振,且系统的谐振特性与虚拟阻抗、负载以及反馈滤波器等因素密切相关。最后,针对系统的谐振抑制提出合理选取虚拟电感大小并在电流反馈环节引入串联反馈滤波器的新策略。实验结果验证了所建孤岛模式下逆变器并联系统数学模型的正确性以及所提出的谐振特性分析方法和谐振抑制策略的可行性。
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姚 骏
谭 义
杜红彪
郭利莎
曾 欣
关键词 逆变器并联谐波交互虚拟阻抗等效导纳谐振抑制    
Abstract:Aiming at the resonance problem of inverter parallel system in islanding mode,the single inverter system equivalent model by considering the influence of nonlinear factors such as digital control delay and digital filters etc.was established.Furthermore,an islanding multi parallel inverter system equivalent model was achieved by extending the single equivalent model.In addition,the resonant characteristics of the parallel inverter system were further analyzed by using the equivalent admittance of islanding multi inverter parallel system.The analytical results show that the multi harmonic interaction between the inverters may cause system resonance.As a conclusion,the resonant characteristics of the system were influenced by the virtual impedances,loads and feedback filters etc.Finally,a novel strategy by carefully selecting the virtual impedance and introducing a series feedback filter in current feedback loop was proposed to suppress the system resonance.Experimental results are used to verify the correctness of islanding mode multi inverter parallel system equivalent model,and the feasibility of proposed resonant characteristics analysis method,suppression strategy are also verified by the experimental results.
Key wordsParallel inverters    harmonic interaction    virtual impedance    equivalent admittance    resonance suppression   
收稿日期: 2015-05-30      出版日期: 2016-12-26
PACS: TM46  
基金资助:国家自然科学基金项目(51477016)和中央高校基本科研业务费重点项目(106112015CDJZR155516)资助。
作者简介: 姚 骏 男,1979年生,博士,教授,博士生导师,研究方向为电机及其控制、电力电子与电力传动、风电技术以及新能源电能变换技术。E-mail:topyj@163.com(通信作者)谭 义 男,1991年生,硕士研究生,研究方向为电力电子技术以及风电技术。E-mail:15805208362@139.com
引用本文:   
姚 骏, 谭 义, 杜红彪 ,郭利莎 ,曾 欣. 孤岛模式下逆变器并联系统的谐振特性分析及其抑制策略研究[J]. 电工技术学报, 2016, 31(23): 199-210. Yao Jun, Tan Yi, Du Hongbiao, Guo Lisha, Zeng Xin. Analysis of Resonant Characteristics and Resonance Suppression Strategy of Inverter Parallel System in Islanding Mode. Transactions of China Electrotechnical Society, 2016, 31(23): 199-210.
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