云广±800kV直流落点穗东对广东中北部地区电力系统的影响

Impact of Yunnan-Guangdong ±800 kV DC Project's Receiving End Locating at Suidong on the North Central Guangdong Grid

广东中北部电网火电装机相对较少,落点穗东换流站的云广±800kV直流双极投产后,该电网的水电比例进一步提高,区内电源结构性调整需求增加。针对云广直流双极停运损失功率较大的情况,分析了云广直流对受端近区网架结构的要求及对中北部电网供电的影响。结果表明,广东中北部电网有必要推进骨干电源的建设和电源结构调整,提高近区电网供电的适应性,才能更好地发挥云广直流的输电功效。

As the North Central Guangdong Grid （NCGG） has less scale of thermal power generating units,both the ratio of its hydroelectric power and the regulation requirement of power source in the grid will increase after the bipolar operation of Yunnan-Guangdong ±800 kV DC project with the receiving end of Suidong.This paper analyzes the impact of the DC project on the network requirements in the nearby areas of the receiving end as well as the power supply situation of NCGG in the case where the power reduction is great due to bipolar fault of the DC project.The results show that NCGG shall promote the key internal power source expansion and source configuration regulation,and improve the power supply adaptability of NCGG in the nearby areas of the receiving end so to exert the function of the DC project.