基于修正能量函数的广东电网最佳稳措控制算法

Optimal Emergency Tripping and Load Shedding Evaluation Using CTEF Approach on Power System in Guangdong

紧急控制是保证电力系统遭受大的扰动后维持系统暂态稳定的主要措施.研究了基于修正的暂态能量函数的最佳切机和切负荷计算新方法.结合广东电网安稳控制系统的配置情况和实际运行要求,提出了紧急控制措施决策框架.研究了修正能量函数裕度与切负荷量的相互关系.针对广东电网典型运行方式下的严重故障进行了在2个切机子站,4个切负荷子站上的紧急控制措施分析.计算结果表明,能量裕度线性差值方法使控制方案的非线性搜索过程在保证结果准确的前提下大大简化.该方法可应用于任意复杂的故障场景和任意细节的电力系统元件模型.

The transient stability-constrained emergency control is primary work of transient stability analysis of power system under harmful contingencies. The optimal emergency generator tripping and load shedding measures based on corrected transient energy function （CTEF） method are proposed in this paper which aim to prevent cascading outages. According to the configuration of stability control system and operation requirements of Guangdong Power System, the frame of decision-making about emergency control in system is developed. In addition,curves of energy margin （EM） calculated at different load shedding show the numerical relation between EM and shedding power. The emergency control measures are evaluated by the severe faults scenarios in typical operating conditions including two generation-tripping and four load-shedding substations in Guangdong Power System. The results show that the linearization technique based on EM can reduce calculation burden in searching for optimal scheme. This scheme is applicable to any complex fault scenarios and any detail element models of power system.