A Unified Model of Grid-Connected Distributed Generation through Inverters
Ma Yahui1, Li Xinran1, Xu Zhenhua1, Wang Ling2, Wei Xiaoyan1
1. College of Electrical and Information Engineering Hunan University Changsha 410082 China 2. Electric Power Research Institute of Guangdong Power Grid Corporation Guangzhou 510600 China
Abstract:In order to study the influence of distributed power generation(DG) on composite load characteristics of distribution network, this paper make a study on the general and specific features of grid-connected DG through inverter in detail, such as micro-turbine generation(MTG), photovoltaic(PV), fuel cell(FC), and directly driven wind turbine with permanent magnet synchronous generator (D-PMSG). A unified dynamic model composed of a controlled voltage source and an equivalent impedance in series is proposed and its integrated analytical description is deduced here. The model parameters are identified by a synthetically improved genetic algorithm under different voltage disturbance levels, and then its self-description ability, generalization ability and parametric stability are verified. The verification indicates that the unified model has high applicability and can well describe the equivalent dynamic characteristic of grid-connected DG through inverters.
马亚辉, 李欣然, 徐振华, 王玲, 韦肖燕. 一种逆变并网型分布式电源统一模型[J]. 电工技术学报, 2013, 28(9): 145-154.
Ma Yahui, Li Xinran, Xu Zhenhua, Wang Ling, Wei Xiaoyan. A Unified Model of Grid-Connected Distributed Generation through Inverters. Transactions of China Electrotechnical Society, 2013, 28(9): 145-154.
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