含大型风电场的弱同步电网协调控制策略  

Coordinated control of weakly-synchronized grid containing large wind farms

作　　者：李超[1] 王洪涛[1] 韦仲康 王春义 

机构地区：[1]山东大学电网智能化调度与控制教育部重点实验室,山东济南250061 [2]国网冀北电力有限公司,北京100053 [3]国网山东省电力有限公司,山东济南250001

出　　处：《电力自动化设备》2015年第4期96-103,共8页Electric Power Automation Equipment

基　　金：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)~~

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。A multi-model frequency regulation strategy based on the MPC（Model Predictive Control） technology 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.

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 

分 类 号：TM73[电气工程—电力系统及自动化]