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| 摘要: |
| 多台逆变器并联运行可实现大容量和冗余供电,提高供电系统的灵活性和可靠性。对逆变器电流、电压双闭环控制系统参数设计方法进行了研究,分析了逆变器输出电压幅值、相位与逆变器输出有功功率和无功功率的关系,阐述了通过控制输出电压和相位实现对无功、有功功率控制PQ法;系统主电路利用高频链软开关拓扑结构,设计了一种改进的PQ控制和基于电流分解的无连线并联控制方法,有效地解决基本PQ控制算法在非线性负载均流效果差的缺陷。系统采用TMS320LF2407A数字信号处理器进行控制。仿真结果表明该系统设计达到了很好的并联控制效果,具有良好的控制性能。 |
| 关键词: 并联运行,高频链,PQ算法 |
| DOI： |
| 分类号:TM464 |
| 基金项目:广东省自然科学基金 |
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| Design of high-frequency link parallel inverter control system |
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WANG Xiansheng LI Xianxiang LI Hong
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| Abstract: |
| Several inverters operating in parallel realize redundant power supply with large capacity,which improve system flexibility and stability. The parameter design of dual-close-loop inverter control system is researched. The relationship between the output voltage amplitude and phase and the output reactive and active powers is analyzed. The PQ technology is explained,which controls output reactive and active powers by output voltage amplitude and phase. To improve current sharing for nonlinear load,the main circuit adopts the topology of high-frequency link and soft switching while the controller applies the modified PQ technology and the disconnected parallel control technology based on current decomposition. Simulative results show its nice effectiveness and performance of parallel control. |
| Key words: parallel operation,high-frequency link,PQ theory |
