新一代±800 kV/8 GW特高压直流换流阀用饱和电抗器温升试验及比对分析

doi:10.12204/j.issn.1000-7229.2020.10.010

电力建设 ›› 2020, Vol. 41 ›› Issue (10): 90-97.doi: 10.12204/j.issn.1000-7229.2020.10.010

新一代±800 kV/8 GW特高压直流换流阀用饱和电抗器温升试验及比对分析

刘帮虎¹^,², 王加龙³, 潘励哲⁴, 杨勇³, 石岩³, 李明³

1.三峡大学电气与新能源学院,湖北省宜昌市443002
2.新能源微电网湖北省协同创新中心(三峡大学)湖北省宜昌市443002
3.国网经济技术研究院有限公司,北京市 102209
4.国家电网有限公司直流建设分公司,北京市100052

收稿日期:2020-06-11 出版日期:2020-10-01 发布日期:2020-09-30
通讯作者: 王加龙
作者简介:刘帮虎(1990),硕士研究生,主要研究方向为电力系统接地技术;|潘励哲(1989),男,硕士,工程师,主要研究方向为特高压/柔性直流输电工程设计及应用;|杨勇(1984),男,硕士,高级工程师,主要研究方向为特高压/柔性直流输电工程设计及应用;|石岩(1963),男,教授级高级工程师,主要研究方向为特高压/柔性直流输电工程设计及应用;|李明(1979),男,博士,高级工程师,主要研究方向为特高压/柔性直流输电工程设计及应用。
基金资助:
国家电网公司科技项目“±800 kV/8 GW特高压直流输电工程标准化和技术提升研究”(5200-202056138A-0-0-00)

Temperature Rise Test and Comparative Analysis of Saturable Reactors for New Generation of ±800 kV/8 GW UHVDC Converter Valve

LIU Banghu¹^,², WANG Jialong³, PAN Lizhe⁴, YANG Yong³, SHI Yan³, LI Ming³

1. College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei Province, China
2. Hubei Provincial Collaborative Innovation Center for New Energy Microgrid,China Three Gorges University,Yichang 443002, Hubei Province, China
3. State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China
4. State Grid DC Engineering Construction Company, Beijing 100052, China

Received:2020-06-11 Online:2020-10-01 Published:2020-09-30
Contact: WANG Jialong
Supported by:
Science and Technology Project of SGCC “Study on Standardization and Technology Improvement of ±800 kV/8 GW UHVDC Transmission Project”(5200-202056138A-0-0-00)

摘要/Abstract

摘要：

为研究特高压直流输电工程换流阀用饱和电抗器的温升特性,掌握内部铁芯温度分布规律,分析了现有换流阀用饱和电抗器损耗及铁芯温升计算模型,提出了基于预埋光纤温度传感器的特高压直流换流阀用饱和电抗器温升试验方法,实现了对电抗器内部全部铁芯的直接温度测量。依托新一代±800 kV/8 GW特高压直流工程,设计了高频电源等效铁芯损耗加载以及合成回路阀组件运行试验加载2种试验条件,分别测量了4种型号的换流阀饱和电抗器关键点温度,比对分析了铁芯温度分布特性。试验结果表明,2种试验加载方式下,饱和电抗器内部靠近进出水口位置铁芯温度低于其他位置的铁芯温度,各型号饱和电抗器温升特性规律基本一致;在换流阀运行条件下,各电抗器铁芯最高温度均小于90 ℃,外壳表面温度均小于75 ℃,满足工程要求。

关键词: 特高压直流, 阀用饱和电抗器, 光纤温度传感器, 温升试验, 铁芯温升, 温度分布

Abstract:

In order to study the temperature rise characteristic of the saturable reactor for UHVDC converter valve and obtain the temperature distribution laws of the cores inside, this paper analyzes the calculation models of saturable reactor loss and core temperature rise on the basis of existing researches. A temperature rise test mothed for saturable reactors is proposed on the basis of embedded optical fibre temperature sensors, by which the temperature of all the cores inside could be measured directly. Two test conditions are designed considering the new generation of ±800 kV/8 GW UHVDC transmission project, including the equivalent core loss loading method by high frequency power source and valve section operating test loading method by synthetic test circuit. The temperature of the key points of four kinds of UHVDC valve reactors are measured and the temperature distribution characteristics of cores inside are analyzed comparatively. The results show that, under two test conditions, the temperature of the cores close to cooling water inlet and outlet are lower than others in one valve saturable reactor, and the temperature rise characteristics of each type of saturable reactor are basically consistent. Under operating condition, the core temperature of each type of valve reactor is lower than 90℃ and the case temperature is lower than 75℃, which can meet the requirements of UHVDC project.

Key words: UHVDC, valve saturable reactor, optical fibre temperature sensor, temperature rise test, core temperature rise, temperature distribution

中图分类号:

TM474

刘帮虎, 王加龙, 潘励哲, 杨勇, 石岩, 李明. 新一代±800 kV/8 GW特高压直流换流阀用饱和电抗器温升试验及比对分析[J]. 电力建设, 2020, 41(10): 90-97.

LIU Banghu, WANG Jialong, PAN Lizhe, YANG Yong, SHI Yan, LI Ming. Temperature Rise Test and Comparative Analysis of Saturable Reactors for New Generation of ±800 kV/8 GW UHVDC Converter Valve[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(10): 90-97.

图/表 12

图1 饱和电抗器结构示意图

Fig.1 Structure of valve saturable reactor

图2 饱和电抗器铁芯位置截面图

Fig.2 Sectional view of saturable reactor core under two design schemes

图3 饱和电抗器铁芯热阻模型

Fig.3 Thermal resistance model of saturable reactor core

图4 预埋光纤传感器的饱和电抗器试品

Fig.4 Saturable reactor with embedded optical fibre temperature sensors

表1 ±800 kV/8 GW换流阀饱和电抗器设计参数

Table 1 Design parameters of valve saturable reactor in ±800 kV/8 GW converter

图5 饱和电抗器内部铁芯测点编号示意图

Fig.5 Indication of the core number in saturable reactor

图6 电抗器试品A铁芯的温升曲线

Fig.6 Curve of temperature rising of cores in Reactor A

表2 等效铁芯损耗加载条件下各型号饱和电抗器试品温升试验结果

Table 2 Temperature rise test results of different type of reactor under equivalent core loss loading condition

图7 不同饱和电抗器内部铁芯温度分布曲线

Fig.7 Temperature distribution curves of cores in different reactors

图8 阀组件运行试验条件下试品A电压波形

Fig.8 Voltage curve of Reactor A under valve section operating test condition

表3 不同试验条件下阀饱和电抗器温升试验结果

Table 3 Temperature rise test results of valve saturable reactor under different test conditions

图9 2种试验条件下试品C铁芯温升分布曲线

Fig.9 Temperature distribution curves of cores in Reactor C under two test conditions

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新一代±800 kV/8 GW特高压直流换流阀用饱和电抗器温升试验及比对分析

Temperature Rise Test and Comparative Analysis of Saturable Reactors for New Generation of ±800 kV/8 GW UHVDC Converter Valve

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