含电动汽车充放电站和分布式电源的城市电网智能保护及孤岛运行研究

As people pay more attention to the environment protection and energy saving, the electric vehicles and distributed generations will get their rapid development, which would cause new security problems when large amounts of them are introduced to city grid. Intelligent protection and islanding operation of city grid including charging&discharging stations for electric vehicle and distributed generations are studied in this project. Based on the models of charging&discharging stations and distributed generations, the dynamic operation mechanism and fault characteristics of grid is analyzed, and an intelligent protection scheme is proposed considering the impact of charging&discharging stations and distributed generations on the relay protection. Also the optimal control algorithm of islanded operation supported by electric vehicles and the island grid's intelligent reclosing strategy targeting for minimum disturbance after reclosure operation are investigated. Research achievements of this project are beneficial to exploration on smart protection theory and islanded operation control mechanism of city grid including intermittent energy source and distributed energy storage units. As a result, the large-scale application of electric vehicles & distributed generations and their security operation in city grid are also promoted.

随着人们对环保与节能的重视，电动汽车和分布式电源将得到迅猛发展，它们的引入必将给城市电网的安全运行带来新的问题。本项目拟对含电动汽车充放电站和分布式电源的城市电网保护及孤岛运行相关问题进行深入研究，在建立电动汽车充放电站模型和分布式电源模型的基础上，分析含随机波动电源、分布式微储能的城市电网动态运行机制和故障特性；探讨电动汽车充放电站和分布式电源的引入对线路保护的影响，提出相应的城市电网智能保护方案；利用电动汽车作为分布式能量载体，探索电网故障时利用电动汽车来支撑分布式电源孤岛运行的最优控制算法；以合闸后电网扰动最小为目标，给出含电动汽车充放电站的分布式电源孤岛电网智能重合闸策略。本项目的研究成果是对含随机波动电源、分布式微储能的电网继电保护理论和孤岛运行控制机制的有益探索，能够为含电动汽车充放电站和分布式电源的城市电网安全稳定运行提供保障，有利于推动电动汽车和分布式电源的大规模应用。

随着人们对环保与节能的重视，电动汽车和分布式电源将得到迅猛发展，它们的引入必将给城市电网的安全运行带来新的问题。本项目对含电动汽车充放电站和分布式电源的城市电网保护及孤岛运行相关问题进行了深入研究，在建立电动汽车充放电站模型和分布式电源模型的基础上，分析含随机波动电源、分布式微储能的城市电网的动态运行机制和优化调度策略；探讨了电动汽车充放电站和分布式电源的引入对线路保护的影响，提出了含电动汽车充放电站和分布式电源的城市电网智能保护方案；利用电动汽车作为分布式能量载体，提出了电网故障时利用电动汽车来支撑分布式电源孤岛运行的最优控制算法；以合闸后电网扰动最小为目标，给出含电动汽车充放电站的分布式电源孤岛电网智能重合闸策略。本项目的研究成果是对含随机波动电源、分布式微储能的电网智能继电保护理论和孤岛运行控制机制的有益探索，能够为含电动汽车充放电站和分布式电源的城市电网安全稳定运行提供保障，有利于推动电动汽车和分布式电源的大规模应用。