考虑低压配电网弹性提升的两阶段风险控制方法

Method for Two-Stage Risk Control Considering Elasticity Improvement of Low-Voltage Distribution Network

为进一步提高低压配电网的供电可靠性与稳定性,提出考虑低压配电网弹性提升的两阶段风险控制方法,增强低压配电网的极端气象灾害应对能力。首先,构建考虑配电线路故障的低压配电网运行风险鉴定模型,提出包含预防控制和纠正控制的低压配电网风险控制框架;其次,建立电力用户需求响应(DR)模型,以激励并引导电力用户参与供电恢复。在此基础上,构建基于运行风险的低压配电网预防控制模型;再次,为降低故障发生时的应急风险成本,提出低压配电网纠正控制方法;最后,利用改进型IEEE 33节点配电系统针对不同弹性提升方法进行对比分析。结果表明,所提出的两阶段风险控制方法能够有效降低低压配电网的运行成本,并有助于缓解低压配电网潜在故障发生时的负荷削减情况。

In order to further improve the power supply reliability and stability of low-voltage distribution network,a two-stage risk control method considering the elasticity improvement of low-voltage distribution network is proposed to enhance the ability of low-voltage distribution network to cope with extreme meteorological disasters.Firstly,a low-voltage distribution network operation risk identification model considering distribution network line faults is constructed,and a low-voltage distribution network risk control framework containing preventive control and corrective control is proposed.Secondly,a demand response(DR)model for power consumers is established to motivate and guide them to participate in power supply restoration,and a preventive control model for the distribution network based on operational risk is constructed.Finally,a comparative analysis is conducted using the improved IEEE 33 node distribution system for different resilience enhancement methods.The results show that the proposed two-stage risk control method can reduce the operating cost of the low-voltage distribution network and contribute to the mitigation of load shedding in the event of potential faults in the low-voltage distribution network.