宽范围小步长可调电抗器关键技术研究  

Research on key technologies of adjustable reactor with wide range and small step

作　　者：曹燕明 王贵娟 李亚男 全宏莲 CAO Yanming;WANG Guijuan;LI Yanan;QUAN Honglian(State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 100000,China;TBEA Hengyang Transformer Co.,Ltd.,Hengyang 421007,China)

机构地区：[1]国网经济技术研究院有限公司,北京100000 [2]特变电工衡阳变压器有限公司,湖南衡阳421007

出　　处：《现代电子技术》2023年第17期170-173,共4页Modern Electronics Technique

摘　　要：太阳能、风能等新能源并网容量的逐年攀升和其波动性、随机性等特点,给电网带来严重的过电压、无功失衡等问题,新型电力系统迫切需要可靠性高、适应性强、性价比高的无功补偿装置。文中基于电抗器和有载分接开关的成熟技术,以某海上风电送出方案为例,提出VSR-200000/330可调并联电抗器设计方案,方案可实现40%~100%的宽范围、1.4%~2.6%小步长的无功调节。对电抗器的绝缘特性、漏磁温升特性开展仿真分析,结果表明,可调电抗器在雷电冲击过电压下存在高振荡情况,在调压反向接入时漏磁最大、结构件温升最高。The yearly increasing of grid⁃connected capacity of new energy sources such as solar energy and wind energy and their characteristics of volatility and randomness bring serious problems to the power grid,for example,overvoltage and reactive power imbalance.Therefore,the new power system urgently needs reactive power compensation devices with high reliability,strong adaptability and high cost⁃effectiveness.This article is based on the mature technology of reactors and on load tap changers.A design scheme of VSR⁃200000/330 adjustable parallel reactor is proposed by taking a certain offshore wind power transmission scheme as an example.The scheme can realize reactive power regulation with a wide range of 40%~100%and a small step of 1.4%~2.6%.Simulation analysis on the insulation characteristics and magnetic flux leakage temperature rise characteristics of the reactor was conducted.The results show that the adjustable reactor has high oscillation in the case of overvoltage caused by lightning impulse;during reverse voltage regulation,it has the maximum magnetic flux leakage and its structural components has the highest temperature rise.

关 键 词：宽范围 可调电抗器 无功 绝缘 冲击 磁场 温升 

分 类 号：TN602-34[电子电信—电路与系统] TM472[电气工程—电器]