包括供电瓶颈识别的电力系统供电能力评估

摘要

In the assessment of load supply capability,not only the values of the associated criteria have to be calculated,but also the power supply bottlenecks should be identified.The existing approaches cannot systematically and effectively address these issues.Given this background,to implement the objective of assessment of load supply capability,a value function of the load supply margin is definedto guide the reasonable allocations of loads among buses in the system,and to identify the power supply bottlenecks.First,an optimization model for assessing the load supply capability is developed with the maximization of the value function as the objective,and security limitations as constraints.The well-developed differential evolution (DE) algorithm is employed to solve the developed optimization model.The feasibility and the efficiency of the developed model and algorithm are demonstrated by Guangdong actual power system.%供电能力评估不仅是计算量度指标,更是为系统运行和规划人员提供供电瓶颈环节等重要信息.现有方法尚不能系统而有效地处理这些问题.在此背景下,为了评估电力系统供电能力,构造了供电裕度价值函数来引导负荷在系统中节点间合理分配,并同时识别系统运行中存在的供电瓶颈.首先,以供电裕度价值函数最大化为目标,考虑系统安全运行约束,构造了供电能力分析评估的数学模型；然后,采用差异进化算法求解所发展的优化问题；最后,通过在广东电力系统的实际应用验证了模型和方法的可行性与有效性.