| 引用本文: | 李 超,王洪涛,韦仲康,王春义.含大型风电场的弱同步电网协调控制策略[J].电力自动化设备,2015,35(4): |
| LI Chao,WANG Hongtao,WEI Zhongkang,WANG Chunyi.Coordinated control of weakly-synchronized grid containing large wind farms[J].Electric Power Automation Equipment,2015,35(4): |
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| 摘要: |
| 针对含大型风电场的弱同步电网频率稳定问题，提出了一种基于模型预测控制（MPC）技术的风电机组多模型预测控制（MMPC）调频控制策略。该控制策略根据风速条件设定预测模型库，能够在不同风速条件下协调控制桨距角与发电机转矩改变风电机组出力响应弱电网频率的变化，从而有效提升风电机组的频率调节能力。同时，针对弱同步电网的电压稳定问题，引入静止同步补偿器（STATCOM）建立中心控制系统。通过中心控制系统实时的有功-无功协调控制，可以保证在负荷波动和故障情况下风电机组不脱网并维持弱电网电压和频率的稳定。仿真分析表明所提出的控制策略的有效性。 |
| 关键词: 弱同步电网 风电场 多模型预测控制 静止同步补偿器 协调控制 稳定性 频率稳定 电压稳定 |
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| 基金项目:国家自然科学基金资助项目（51177092）；国家高技术研究发展计划（863计划）资助项目（2011AA05A101） |
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| Coordinated control of weakly-synchronized grid containing large wind farms |
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LI Chao1, WANG Hongtao1, WEI Zhongkang2, WANG Chunyi3
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1.Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education，Shandong University，Ji’nan 250061，China;2.State Grid Jibei Electric Power Company，Beijing 100053，China;3.State Grid Shandong Electric Power Company，Ji’nan 250001，China
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| Abstract: |
| A multi-model frequency regulation strategy based on the MPC（Model Predictive Control） tech-nology is proposed for the wind turbine-generator set in the weakly-synchronized grid with large-scale wind farms，which sets the prediction model base according to the wind speed conditions. It can coordinate the pitch angle control and the generator torque control in different wind speed conditions to regulate the active power output of generation set for responding to the frequency variation of weak grid and improving the frequency regulation capability of wind turbine-generator set. A central control system with STATCOM is established for the voltage stability of weak grid，which coordinates the active power control and the reactive power control in real time to ensure the ride-through of wind turbine-generator set and the voltage and frequency stability of weak grid in the conditions of load fluctuation and fault. Simulative results show the effectiveness of the proposed strategy. |
| Key words: weakly-synchronized grid wind farms multi-model predictive control STATCOM coordinated control stability frequency stability voltage stability |
