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虚拟同步机在基于内燃机的孤岛微网中的应用 预览

Application of VSG in Island Micro-grid Based on Internal Combustion Engine
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摘要 内燃机由于动态响应速度较慢,在负载突变时其输出电压频率变化幅度较大,影响负荷的正常工作和系统的稳定运行;另外,现有的内燃机与虚拟同步机(VSG)组成的混合微网在主电源变化时,VSG逆变器需进行控制模式切换。针对此问题,在分析了内燃机模型及动态特性的基础上,提出了基于VSG与内燃机孤岛微网协调控制策略。VSG不仅可在动态过程中快速补偿微网输入和输出的不平衡功率,从而抑制频率的大幅波动,当内燃机退出运行时,VSG可作为主电源独立支撑微网电压和频率,且无需进行控制模式的切换,提高了系统的稳定性。 As the dynamic response of internal combustion engine is slow,the frequency of output voltage changes greatly when the load is abrupt,which affects the normal operation of the load and the stable operation of the system. In addition,when the main power supply in the existing complementary microgrid of internal combustion engine and virtual synchronous generator(VSG)changes,the control mode of VSG inverter should be switched. Aiming at these problems,based on the analysis of internal combustion engine model and its dynamic characteristics,a coordinated control strategy of energy storage based on VSG and internal combustion engine was put forward. VSG can not only compensate microgrid input and output unbalanced power in dynamic process rapidly,thus to suppress large frequency fluctuations,but also can be used as the main power supply independently to support microgrid voltage and frequency when internal combustion engine stops running,and the control mode of VSG doesn′t need to be switched,thereby the system stability is improved.
作者 陈斌 赵仕龙 CHEN Bin,ZHAO Shilong(Beijing Gas Group Co.,Ltd.,Beijing 100035,China)
出处 《电气传动》 北大核心 2018年第7期72-77,共6页 Electric Drive
关键词 虚拟同步机 内燃机 协调控制 微网 virtual synchronous generator(VSG);internal combustion engine;coordinated control;microgrid
作者简介 陈斌(1975-),男,硕士,研究生,高级工程师,Email:chenbin_bjgas@163.com
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