Study on Influence of Coupling Transformer Charging Inrush Current to Hami-Zhengzhou UHV DC Project

doi:10.11930/j.issn.1004-9649.201608065

Abstract

Abstract: Inrush current during charging of coupling transformer in UHV DC converter station results in converter AC bus voltage distortion and harmonics in DC system. The harmonics are dominated by second and third order harmonic. Harmonic leads to DC voltage, current and power fluctuations and especially system overvoltage, which may result in DC power system harmonic protection alarm and even action in severe cases. It affects safe and stable operation of UHV DC project. Based on practical system condition, charging inrush current and voltage harmonic characteristics of two expansion groups of 750/500 kV coupling transformers in Tianshan converter station are studied. The influence on harmonic protection of Hami-Zhengzhou ±800 kV UHV DC project is investigated and suggestions on safety measures for coupling transformers energizing are proposed. The results provide effective countermeasures to ensure safe operation of Hami-Zhengzhou UHV DC project. These results also offer useful reference and guidance for other similar projects.

Key words: UHV DC project, coupling transformer, inrush current, harmonic protection, countermeasure

CLC Number:

TM723

ZHENG Bin, YANG Peng, TENG Wentao, BAN Liangeng, XIANG Zutao, WU Yani, ZHANG Yuanyuan, LUO Lishi, PAN Yifei. Study on Influence of Coupling Transformer Charging Inrush Current to Hami-Zhengzhou UHV DC Project[J]. Electric Power, 2017, 50(12): 130-135.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201608065

https://www.electricpower.com.cn/EN/Y2017/V50/I12/130

References

[1] 徐式蕴,吴萍,赵兵,等. 提升风火打捆哈郑特高压直流风电消纳能力的安全稳定控制措施研究[J]. 电工技术学报,2015,30（13）：92-99.
XU Shiyun, WU Ping, ZHAO Bing, et al . Study on the security and stability control strategy enhancing the wind power consuming ability of the wind-thermal power combining Hazheng UHVDC system[J]. Transactions of China Electrical Society,2015, 30(13): 92-99.
[2] 胡艳梅,吴俊勇,李芳,等. ±800 kV哈郑特高压直流控制方式对河南电网电压稳定性影响研究[J]. 电力系统保护与控制,2013,41（21）：147-153.
HU Yanmei, WU Junyong, LI Fang, et al . Impacts of DC system control mode for ±800 kV Hazheng UHVDC on voltage stability of henan power grid [J]. Power System Protection and Control, 2013, 41(21): 147-153.
[3] 钟胜,郭相国,田昕,等. 哈密至郑州特高压直流对受端电网影响分析[J]. 中国电力,2012,45（11）：47-51.
ZHONG Sheng, GUO Xiangguo, TIAN Xin, et al . Influences of the UHVDC project from Hami to Zhengzhou on central China power grid [J]. Electric Power, 2012, 45(11): 47-51.
[4] 徐式蕴,吴萍,赵兵,等. 哈郑直流受端华中电网基于响应的交直流协调控制措施[J]. 电网技术,2015,39（7）：1773-1778.
XU Shiyun, WU Ping, ZHAO Bing, et al . Coordinated control strategy of interconnected grid integrated with UHVDC transmission line from Hami to Zhengzhou [J]. Power System Technology, 2015, 39(7): 1773-1778.
[5] 朱韬析,王超,张雪松,等. 浅析空载投入换流变压器对直流输电系统的影响[J]. 电力系统自动化,2007,31（23）：108-112.
ZHU Taoxi, WANG Chao, ZHANG Xuesong, et al . Analysis of impacts on HVDC transmission systems when converter transformers are energized[J]. Automation of Electric Power Systems, 2007, 31(23): 108-112.
[6] 滕予非,丁理杰,汤凡,等. 基于谐波互阻抗的励磁涌流引发谐波电压畸变风险识别[J]. 电力自动化设备,2014,34(8)：155-161.
TENG Yufei, DING Lijie, TANG Fan, et al . Risk identification based on harmonic mutual impedance for harmonic voltage distortion caused by excitation inrush current [J]. Electric Power Automation Equipment, 2014, 34(8): 155-161.
[7] 王华伟,韩民晓,张健,等. 送端弱系统对特高压直流工程调试和运行的影响[J]. 中国电力,2014,47(10)：47-51.
WANG Huawei, HAN Minxiao, ZHANG Jian, et al . Impacts of weak AC system on the commissioning and operation of UHVDC transmission project [J]. Electric Power, 2014, 47(10): 47-51.
[8] 刘心旸,蒋维勇,李亚男. 青海电网二次谐波传导机理与抑制措施[J]. 电网技术,2015,39（8）：2277-2282.
LIU Xinyang, JIANG Weiyong, LI Yanan. Second harmonic transmission mechanism and suppression measures in Qinghai power grid [J]. Power System Technology,2015,39(8): 2277-2282.
[9] 周佩朋,项祖涛,杜宁,等. 西北750 kV电网合空变导致青藏直流闭锁故障分析[J]. 电力系统自动化,2013,37（10）：129-133.
ZHOU Peipeng, XIANG Zutao, DU Ning, et al . Analysis on blocking of Qinghai-Tibet DC system caused by transformer energizing in northwest China 750 kV Grid [J]. Automation of Electric Power Systems, 2013, 37(10): 129-133.
[10] 种芝艺,粟小华,刘宝宏.西北电网主变充电引起青藏直流闭锁的原因分析及对策[J]. 电力建设,2013,34（3）：88-91.
CHONG Zhiyi, SU Xiaohua, LIU Baohong. Analysis and countermeasures of Qinghai-Tibet DC blocking caused by main transformer charging in northwest power grid [J]. Electric Power Construction, 2013, 34(3): 88-91.
[11] 韩彬,王东阳,沈海滨,等. 皖电东送淮南—上海特高压交流输电示范工程系统调试总结[R]. 北京：中国电力科学研究院,2013.
[12] 张保会,尹项根. 电力系统继电保护[M]. 北京：中国电力出版社,2010.
ZHANG Baohui, YIN Xianggen. Power System relay protection[M]. Beijing: China Electric Power Press, 2010.
[13] 顾春阳,王爱元,李健,等. 一种有效抑制变压器空载合闸励磁涌流的方法[J]. 变压器,2015,52（11）：33-36.
GU Chunyang, WANG Aiyuan, LI Jian, et al . Method to suppress magnetizing inrush current of transformer during no-loaded closing [J]. Transformer, 2015, 52(11): 33-36.
[14] 郑彬,班连庚,周佩朋,等. 合闸750 kV空载变压器引起的系统电压暂降现场实测与计算分析[J].电网技术,2012,36（9）:203-208.
ZHENG Bin, BAN Liangeng, ZHOU Peipeng, et al . Analysis on field measured system voltage sag caused by energizing 750 kV no-load transformer and its simulation comparison[J]. Power System Technology, 2012, 36(9): 203-208.
[15] 中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局. 交流电气装置的过电压保护和绝缘配合设计规范：GB/T 50064—2014[S]北京：中国计划出版社,2014.