【摘要】 在大规模电网中,由简单故障触发的系统连锁跳闸可能会导致大停电事故。建立了一种新的电网连锁故障仿真模型,对故障在电网中的传播方式、故障关键元件的识别、系统发生连锁故障的风险和损失评估进行了研究。考虑了系统负荷状况、天气条件、继电保护隐藏故障等因素,可以得到某种运行状态下的连锁故障风险指标,并识别不同情况下引发连锁故障的关键线路,通过IEEE-RTS系统和IEEE57节点系统的计算结果对本方法进行了验证。更多还原

【Abstract】 In bulk power systems,cascading failures initiated by common events often lead to blackouts.In this paper,a new simulation model of cascading failure is established to investigate the law that the faults spread in power grids,to estimate the outage risk and loss of cascading failures and to recognize the key elements which initiate the cascading faults.The system load conditions, weather conditions, hidden failures of the protective relays are considered in this model.The proposed method can be used to identify the key lines triggering cascading faults in different situations,and get the risk indices of cascading failure in a certain operating state.The application results on the IEEE-RTS and IEEE-57 bus system validate the effectiveness of the proposed method.更多还原