| 引用本文: | 丁 明,朱 灿,陈 忠,陈 中,吴 杰.基于CAN总线的载波同步VSC并联控制方法[J].电力自动化设备,2016,36(5): |
| DING Ming,ZHU Can,CHEN Zhong,CHEN Zhong,WU Jie.Carrier synchronization control for parallel VSCs based on CAN bus[J].Electric Power Automation Equipment,2016,36(5): |
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| 摘要: |
| 针对储能功率调节系统中共交直流母线电压源换流器（VSC）模块并联运行易产生高频环流的问题，设计了基于CAN总线的载波同步并联控制方法。首先分析了载波交错对VSC模块并联系统环流的影响，揭示高频环流形成的机理。然后利用CAN总线时间基准参考实现模块间较高精度的载波同步，同时在传统主从控制的基础上引入模块自主监控机制，改进主模块的确定方式，解决同步控制复杂、冗余性不佳的问题，保证模块间相对独立运行，有效实现模块间高频环流的抑制。实验结果验证了所提控制方法的有效性。 |
| 关键词: VSC并联 储能 载波同步 高频环流 CAN总线 模块自主监控 |
| DOI： |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（2015 -AA050104） |
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| Carrier synchronization control for parallel VSCs based on CAN bus |
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DING Ming1, ZHU Can1, CHEN Zhong2, CHEN Zhong1, WU Jie1
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1.Research Center for Photovoltaic System Engineering，Ministry of Education，Hefei University of Technology，Hefei 230009，China;2.State Grid Anhui Electric Power Corporation Research Institute，Hefei 230022，China
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| Abstract: |
| Aiming at the high-frequency circulating current among the parallel VSC （Voltage Source Converter） modules of the energy storage PCS（Power Conditioning System），a method of carrier synchronization control based on CAN bus is proposed. The influence of interleaved carriers on the circulating current among the parallel VSC modules is analyzed and the generation mechanism of high-frequency circulating current is revealed. Based on the CAN-bus clock reference，high-accuracy carrier synchronization among parallel VSC modules is achieved. Aiming at the complex synchronization control and poor redundancy，an independent module monitoring scheme is put forward based on the traditional master-slave control for determining the master module to ensure the independent operation of each VSC module and restrain the circulating current among modules. Experimental results verify the feasibility of the proposed control method. |
| Key words: parallel VSCs energy storage carrier synchronization high-frequency circulating current CAN bus independent module monitoring |
