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文章摘要
特高压直流电压互感器换热结构设计及其对误差特性的影响研究
Research on the heat exchange structure designing for UHV DCVT and its influence on error characteristics
Received:August 04, 2021
Revised:August 17, 2021
DOI：
10.19753/j.issn1001-1390.2022.01.011
中文关键词
:
直流电压互感器
涡旋式换热器
轴向温差
分压比误差
英文关键词
:
DCVT, vortex heat exchanger, axial temperature difference, voltage division ratio error
基金项目
:
国家电网公司总部科技项目资助(超/特高压直流电压互感器研制及试验关键技术研究,项目合同号GYW17201800038)
Author Name
Affiliation
E-mail
WANG Benjin
*
China Electric Power Research Institute
wangbenjin@epri.sgcc.com.cn
WANG Ruihan
State Grid Sichuan Electric Power Company
592024634@qq.com
WU Shipu
China Electric Power Research Institute
wushipu@epri.sgcc.com.cn
YE Ziyang
State Grid Sichuan Electric Power Company
vicenteyzy@hotmail.com
XU Sien
China Electric Power Research Institute
xusien@epri.sgcc.com.cn
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中文摘要
:
为解决直流电压互感器（DCVT）电阻温升造成的测量准确度问题，论文对±800kV DCVT换热问题进行了研究。分析了电阻选择原则，在此基础上进行了DCVT的设计，重点设计了DCVT的换热结构。通过采用涡旋式换热配合双气式结构来达到优化换热方式降低因电阻温升带来的误差的目的。为验证设计效果，建立了考虑SF6物性参数随温度变化的三维DCVT内部温升计算模型。计算结果表明：论文设计的换热器可使DCVT内部总体温升下降10.5%，轴向温差下降43%。因电阻温升产生的测量误差仅为0.025%，符合设计要求。为进一步验证换热效果，进行了温升对分压比影响的试验。试验结果表明：温升条件下DCVT分压比的误差小于0.2级误差限值。理论与试验均表明：论文设计的涡旋式换热结构可使电阻温升导致的误差远小于要求的误差限值，可保证DCVT具有很好的测量精度。
英文摘要
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