| 引用本文: | 李依璘,王明渝,梁慧慧,王少杨.基于分布式控制的不同容量逆变器并联技术研究[J].电力系统保护与控制,2014,42(6):123-128.[点击复制] |
| LI Yi-lin,WANG Ming-yu,LIANG Hui-hui,WANG Shao-yang.Study on distribution controlled inverter parallel system with different power ratings[J].Power System Protection and Control,2014,42(6):123-128[点击复制] |
|
| 摘要: |
| 针对不同容量逆变电源的并联，提出了一种双外环分布式并联控制方案，使得系统由负载电流的大小决定所需并联模块数以及并入系统的各并联逆变模块按自身容量比例分担负载电流，并能有效抑制系统环流，实现系统的冗余并联。该控制方法包括三个控制环：电流内环改善系统动态响应，电压外环确保系统的稳定性，电流外环跟随功率分配单元输出的电流信号来确定该模块所分担的负载电流的大小。其中功率分配单元根据负载电流和逆变电源额定电流的大小确定并联模块数，并提供各逆变模块的投切信号和电流外环给定信号以实现系统的负载电流分配和冗余控制。理论分析和仿真实验验证了该方案的可行性。 |
| 关键词: 逆变器并联 容量 冗余 环流 双外环 |
| DOI：10.7667/j.issn.1674-3415.2014.06.020 |
| 投稿时间：2013-06-18修订日期：2013-10-25 |
| 基金项目:输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512711205) |
|
| Study on distribution controlled inverter parallel system with different power ratings |
| LI Yi-lin,WANG Ming-yu,LIANG Hui-hui,WANG Shao-yang |
| (State Key Laboratory of Transmission Equipment and System Safety and Electrical New Technology, Chongqing University, Chongqing 400044, China) |
| Abstract: |
| With regard to the different capacity power source inverters in parallel, a dual-outer-loop distributed control strategy is proposed. It can achieve the goal that the required modules in parallel system depend on the value of load current and all the parallel modules share load current in proportion to their own capacities, in addition, restrain circulating current and realize the redundancy in parallel. In this strategy, each inverter has three loops: an inner-loop current controller is used to improve the system dynamic response, an outer-loop voltage controller is to govern system stability, and an outer-loop current controller can achieve a weighted output current by following the output signal of power distribution unit. In order to realize load current accurately distribution and redundancy control of system, power distribution unit provides the given current signal of current outer-loop and switch signal of all modules according to the value of load current and voltage source rated current. Theoretical analysis and simulation verify the effectiveness of the strategy. |
| Key words: inverter parallelism capacity redundancy circulating current dual-outer-loop |
