摘要
随着海上风电规模的不断扩大,需要输送至陆上的电能也迅速增加。受成本以及海上通道的影响,不能大规模铺设海缆,通过无功补偿提升海缆输电容量便成了重要途径。本文分析了海缆近风电场侧的无功功率对最大传输容量的影响,当海缆中间点无功最小、电压最高,无功功率在海缆线路终端之间平均分配时,最有利于提升传输容量。在此基础上,本文提出了海缆近风电场侧所需最佳并联电抗器容量的简化计算方法,当调整风电场侧功率因数为一个合理的较小负值时,有助于消耗部分海缆充电功率,减少无功补偿投资成本。
The scale of offshore wind power is expanding, and the power needed to transmit to land is also increasing rapidly. Affected by the cost and the channel, the submarine cable can not be laid on a large scale. It is an important way to enhance the transmission capacity of the submarine cable by reactive power compensation. In this paper, the influence of reactive power on the maximum transmission capacity near the wind farm of the submarine cable is analyzed. When the reactive power of the middle point of the submarine cable is minimum, the voltage is highest, and the reactive power is evenly distributed among the terminals of the submarine cable line, the transmission capacity will be improved. On this basis, a simplified method for calculating the optimal shunt reactor capacity near the wind farm side of the submarine cable is proposed. When the power factor on the wind farm side is adjusted to a reasonable small negative value, it is helpful to consume part of the charging power of the submarine cable and reduce the investment cost of reactive compensation.
作者
张金辉
江岳文
Zhang Jinhui;Jiang Yuewen(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108)
出处
《电气技术》
2019年第5期19-23,共5页
Electrical Engineering
基金
福建省自然科学基金(2018J01482)
关键词
海上风电
充电功率
输送容量
无功补偿
offshore wind power
charging power
transmission capacity
reactive power compensation
