机构地区: 华南理工大学电力学院
出 处: 《电网技术》 2006年第6期30-34,共5页
摘 要: 运用区域负荷裕度判别法研究了2005年丰大基本运行方式下广东电网的静态电压稳定性,定义了区域有功负荷裕度指标,并就广东电网500kV交流线路N?1开断、直流系统停运对该指标的影响进行了敏感性分析。结果表明,区域负荷裕度适于作为静态电压稳定的安全指标;珠江三角洲重负荷区域和粤东地区负荷裕度小,是静态电压安全的薄弱区域;影响负荷裕度较大的关键线路是西电馈入广东的联络线以及沙鹏线、岭东线、东惠线;直流系统停运导致负荷裕度下降较大,其中贵广直流系统产生的影响最大,天广和三广直流系统次之。运行人员应重点监控以上薄弱区域和关键线路。 By use of regional load margin analysis method the static voltage stability of Guangdong Power Grid (GDPG) under summer-heavy operation mode in 2005 is studied. The regional active load margin index is defined and the sensitivity analysis for the influence of N-1 outages of 500 kV AC transmission lines and the HVDC system outages on this index is carried out. Analysis results show that: (A) the regional load margin is suitable to be the security index for static voltage stability; (B) the load margins of the Pearl River Delta in GDPG with heavy load and eastern GDPG are small, therefore they are the weak region of voltage security; (C) the key transmission lines which mostly influence load margin are the tie-lines which feed power from Guangxi Power Grid to GDPG and the following transmission lines within GDPG: from Shajiao to Pengcheng, from Ling'ao to Dongguan and from Dongguan to Huizhou; (D) the outages of HVDC system evidently decrease the load margin, in which the line from Guizhou to Guangdong plays a primary part and the line from Tianshengqiao to Guangdong and the one from Three Gorges to Guangdong play a secondary part. Therefore the operation personnel should pay special attention to the monitoring of above-mentioned key lines and weak regions.
关 键 词: 电力系统 广东电网 静态电压稳定 电压稳定指标 区域负荷裕度 敏感性分析
领 域: [电气工程]