独立局域电网三道防线建设方案分析

文中首先总结了独立局域电网网架结构的特点,结合国家推进售电侧改革的发展趋势,分析了独立局域电网普遍存在的安全稳定问题。以某独立局域电网为例,提出了三道防线建设方案,对稳定控制系统、低频低压减载、高频切机、失步解列配置方案涉及到的一些关键技术问题进行了阐述,并通过实时数字仿真仪(RTDS)仿真试验和离线仿真验证了方案的适用性,对在线实时稳定控制系统的可行性进行了论证。最后对独立局域电网三道防线的建设原则进行了归纳总结。

Analysis on Construction Scheme of Three Defense Lines for Independent Local Power Grid

The structure characteristics of the independent local power grid are summarized firstly.Then,the security and stability problem of the local power grid is analyzed,combined with the development trend of the state promoting sales side reform.Three lines of defense construction scheme are proposed taking an independent local power grid as an example.Some key technical problems related to the stability control system,low frequency and low voltage load shedding,high frequency cutting machine,out-of-step splitting solution are discussed.The applicability of the scheme is verified by RTDS and off-line simulation,the feasibility of on-line and real-time stability control system is demonstrated.Finally,the construction principles of the three lines of defense for the independent local power grid are summarized.