论文部分内容阅读
随着中国电力大发展,长距离、超高电压输电线路的建成投运,线路对地电容的充电功率随电压的平方而急剧增加,巨大的充电功率会引起系统电压升高,还将增大线路的电能损耗、引起自励磁、同期困难等问题,对电网的安全稳定运行构成较大威胁。为此,需要投入大量并联电抗器补偿过剩的无功、控制住系统电压,保证电网的安全稳定运行。自上世纪90年代开始电网中大量使用多层并绕结构的干式空心电抗器,至今已走过了二十多年的历程,产品
With the great development of China’s power industry, the construction of long-distance and ultra-high voltage transmission lines has been completed and put into operation. The charging power of the line to ground capacitor increases sharply with the square of the voltage. The huge charging power will cause the system voltage to increase and will also increase The power loss of the line, causing self-excitation, difficulties over the same period and other issues pose a greater threat to the safe and stable operation of the power grid. To this end, need to invest a large number of parallel reactors to compensate for excess reactive power, control system voltage, to ensure the safe and stable operation of the power grid. Since the 90s of last century, the large number of multi-layer and wound dry hollow reactors used in power grids have been used for more than 20 years and the products