大型风电基地集中并网关键技术

摘要:

风电是理想的非石化清洁能源,大型风电基地集中并网技术是世界前沿课题。基于甘肃酒泉千万千瓦级风电基地的并网案例,分析了一期3 800 MW风电的实际出力特性,指出了电网接纳风电能力的制约因素,提出了大容量风电集中并网跨区域消纳策略存在的问题,并结合已有大型风电场并网运行经验和酒泉风电基地"2.24"风机脱网事故,研究了风场内部35 kV电网接地方式、动态无功补偿设备配置等关键技术问题,解决了一期风电工程在主要设备选型、电力设计、事故处理等细节问题,有利于酒泉千万千瓦级风电基地的可持续发展,对国内外大型风电基地推广集中并网方案具有示范意义。

Abstract:

Wind power is the ideal non － petrochemical clean energy，and the concentrated grid － connection technologies of large － scale wind power bases are the leading issue in the world． Based on the grid － connection case of Jiuquan 10 GW Wind Power Base in Gansu Province，the actual output characteristics of 3． 8 million kilowatts of wind power are analyzed，the constraints of wind power integration capacity in power grid are pointed out，and the problems of large － capacity wind power cross － regional accommodation strategy are proposed． Combined with grid － connection operating experiences for the existing large － scale wind farms and "2． 24" wind fans disconnection from the grid in Jiuquan Wind Power Base，some key issues such as grounding method of 35 kV power grid in wind farm，the configuration of dynamic reactive compensation are studied，the details of main equipment selection，electric power design，and accident treatments of the first phase wind power project are solved． It is of benefit to the sustainable development of Jiuquan 10 GW Wind Power Base，and has the important demonstration significance for the promotion of concentrated grid － connected schemes in domestic and foreign large － scale wind power bases．