计及稳定裕度约束的最优协调电压控制  

Optimal Coordinated Voltage Control Considering Voltage Stability Margin Constraint

作　　者：张岩[1] 王子翔[2] 张文[1] 

机构地区：[1]电网智能化调度与控制教育部重点实验室(山东大学),山东省济南市250061 [2]山东建筑大学,山东省济南市250011

出　　处：《电网技术》2013年第11期3159-3165,共7页Power System Technology

基　　金：国家自然科学基金资助项目(51177093;51207082)~~

摘　　要：为防止故障后系统电压崩溃并维持一定的稳定裕度,提出一种计及稳定裕度约束的协调电压控制策略。该策略基于模型预测控制和轨迹灵敏度方法建立电压协调控制模型。在每个控制周期初始时刻识别系统分岔方式,通过计算相应分岔方式下电压稳定裕度的灵敏度构建稳定裕度约束。若控制周期初始时刻存在稳定平衡点,则将稳定裕度约束加入优化模型,求解最优控制序列。新英格兰39节点系统和Nordic32 52节点系统的仿真结果表明,该方法在协调优化电压幅值的同时确保了系统的稳定裕度。To avoid post-fault power grid voltage collapse and maintain a certain stability margin, a coordinated voltage control strategy considering stability margin is proposed, in which the optimal control model is built based on model predictive control （MPC） and trajectory sensitivity method. In the initial moment of each control interval the bifurcation types of the system are identified, and by means of calculating the sensitivity of voltage stability margin under corresponding bifurcation type, the stability margin constraint is constructed. If a stable equilibrium point exists at the initial moment of the control interval, the stability margin constraint is added to the optimal model to solve the optimal control sequence. Simulation results of New England 39-bus system and Nordic32 52-bus system show that the proposed control strategy can ensure stability margin of power grid while post-fault voltage amplitude is effectively optimized.

关 键 词：电压稳定裕度 鞍结点分岔 极限诱导分岔 轨迹灵敏度 模型预测控制 

分 类 号：TM714.2[电气工程—电力系统及自动化]