| 引用本文: | 薛峰,蔡云峰,徐宁,孟屹华.基于功率解耦控制的并网光伏发电系统机电暂态模型[J].电力系统保护与控制,2017,45(9):63-70.[点击复制] |
| XUE Feng,CAI Yunfeng,XU Ning,MENG Yihua.power decoupling control[J].Power System Protection and Control,2017,45(9):63-70[点击复制] |
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| 摘要: |
| 提出了一种新的适用于电力系统机电暂态仿真的并网光伏发电系统模型。从光伏发电系统稳态潮流模型出发，兼顾电力系统机电暂态仿真要求和现有光伏电磁暂态模型建模特点，将光伏输出的功率近似解耦，用滤波电路两端的电压相角差、逆变器调制比分别计算并网有功、无功输出，模拟光伏发电系统在稳态和暂态过程中的内外部特性。在电力系统综合分析程序(Power System Analysis Software Package, PSASP)的UD模块中建立模型，通过在光照、电网故障扰动情况下的仿真结果和PSASP自带光伏模型的结果进行对比，验证所建模型的正确性。该模型不但考虑了无功控制，还具有封装性好、计算速度快等优点，对大型光伏接入发电系统的暂态稳定分析具有较好的适应性，可以在大规模光伏并网的相关研究方面提供有效的支持与借鉴。 |
| 关键词: 并网光伏发电系统 机电暂态仿真 功率解耦 暂态稳定 |
| DOI：10.7667/PSPC160639 |
| 投稿时间：2016-05-06修订日期：2016-08-15 |
| 基金项目: |
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| power decoupling control |
| XUE Feng,CAI Yunfeng,XU Ning,MENG Yihua |
| (State Grid Suzhou Power Supply Company, Suzhou 215004, China;State Grid Jiangsu Electric Power Company, Nanjing 210000, China) |
| Abstract: |
| This paper presents a novel mechanical and magnetic model of the grid-connected photovoltaic system. Taking requirements and characteristics of present photovoltaic (PV) electromagnetic transient model into account, and taking the theory of power flow calculation as starting point, this paper approximately decouples the output power of the PV system, and uses the phase angle difference between the two ends of the filter and the modulation of the inverter to calculate the active and reactive power respectively, by which simulates the characteristics of the PV system in steady or transient processes. The model is developed in the commercial software package Power System Analysis Software Package (PSASP), and is compared with the PV model in PSASP, considering the disturbance of illumination and three-phase grounding fault in the grid, to validate the accuracy of the model. The simulated results demonstrate that the proposed model is correct, efficient and well encapsulated, which is suitable for the transient stability analysis of a network containing a grid-connected PV model and provides reference for the research of large scale grid-connected PV generation system. |
| Key words: grid-connected photovoltaic system mechanical and magnetic transient simulation power decoupling transient stability |
