特高压交流变压器选相合闸技术研究及工程应用Research and Engineering Application of Phase Selection Closing Technology for UHV AC Transformers
班连庚;郑彬;周佩朋;韩彬;项祖涛;孙岗;王晓彤;王东阳;刘北阳;滕文涛;刘英志;
摘要(Abstract):
变压器空载合闸励磁涌流注入电网可能引起严重的电压暂降或谐波过电压问题,对交直流系统及设备的正常安全运行造成不利影响,目前国内多次出现超、特高压主变空载合闸励磁涌流引起电网异常的问题。选相合闸技术已在国内电厂升压变、高压直流系统换流变等场景有实际应用,但在特高压交流系统中尚属空白。针对国内在晋北特高压交流变电站示范开展的特高压主变选相合闸技术应用实践,介绍了基于剩磁测算的特高压变压器选相合闸技术原理,并结合晋北站特高压交流工程调试系统工况开展建模仿真,比较分析了不同措施抑制变压器励磁涌流的效果,并结合现场实测结果进行验证分析。结果表明,特高压主变断路器采用选相合闸技术可以有效抑制合空变励磁涌流,推广应用价值良好。研究成果可为特高压交流工程设计、设备选型提供参考。
关键词(KeyWords): 特高压交流变压器;励磁涌流;剩磁测算;选相合闸;工程应用
基金项目(Foundation): 国家电网公司科技项目:特高压变压器选相投切技术、控制装置及系统应用研究~~
作者(Author): 班连庚;郑彬;周佩朋;韩彬;项祖涛;孙岗;王晓彤;王东阳;刘北阳;滕文涛;刘英志;
Email:
DOI: 10.13335/j.1000-3673.pst.2017.1998
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