Application of Auxiliary Transformer Series Compensation Technology in Voltage Compensation of Power Voltage Transformer

doi:10.11930/j.issn.1004-9649.201812034

Abstract

Abstract: In view of the fact that the supply voltage of power voltage transformer varies with load, this paper introduces a method of supply voltage compensation based on series compensation technology of auxiliary transformer. Taking a single-phase power supply voltage transformer with rated primary voltage of 110 / 3 kV and rated capacity 60 kV·A as an example, this paper calculates the variation rate of power supply voltage and capacity with load capacity and power factor. According to the rate of change, an automatic compensation circuit of power supply voltage is designed based on auxiliary transformer, which can realize the compensation of power supply voltage (+4.4 V, +8.8 V, +13.2 V, +17.6 V, +22 V, +26.4 and +30.8 V). The power factor cosφ=1 and cosφ=0.89 (inductive) are used to verify the power supply voltage compensation effect under different load capacities. The experimental results show that the power supply voltage change rate of the power supply voltage transformer increases from -1.8% ~ + 11.36% to -3% ~ + 0.045% after adding the automatic series compensation circuit of the auxiliary transformer, and the requirements for the quality of single-phase 220 V power supply voltage can be satisfied. The automatic series compensation technology of auxiliary transformer can be used to compensate the supply voltage of power supply voltage transformer, which solves the problem of low power factor of rural load and low supply voltage in peak load period, and can provide a guarantee for improving the voltage quality of users.

Key words: power voltage transformer, auxiliary transformer, compensation, voltage regulation, supply voltage

LI Xuan, LIU Kun, LIU Xichao, DING Jiajing, AI Bing, SHI Qiang. Application of Auxiliary Transformer Series Compensation Technology in Voltage Compensation of Power Voltage Transformer[J]. Electric Power, 2020, 53(2): 69-75.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201812034

https://www.electricpower.com.cn/EN/Y2020/V53/I2/69

References

[1] 李璿, 吴士普, 王平, 等. 串联阻尼元件的特高压小电容量电容式电压互感器的设计及性能验证[J]. 高电压技术, 2018, 44(6):1844-1852 LI Xuan, WU Shipu, WANG Ping, et al. Design and performance verification of small capacitance UHV CVT Series with damping elements[J]. High Voltage Engineering, 2018, 44(6):1844-1852
[2] 张重实, 王高猛, 张檀雍, 等. 基于最优流法与Mayeda生成树算法相结合的单阶段配网重构新方法[J]. 中国电力, 2018, 51(9):110-117 ZHANG Zhongshi, WANG Gaomeng, ZHANG Tanyong, et al. A new method for one-stage distribution system reconfiguration based on optimal flow algorithm and Mayeda spanning tree algorithm[J]. Electric Power, 2018, 51(9):110-117
[3] 尹项根, 张哲, 王友怀, 等. 变压器间及其与电流互感器暂态交互作用分析和保护对策[J]. 电力系统保护与控制, 2016, 44(23):1-9 YIN Xianggen, ZHANG Zhe, WANG Youhuai, et al. Multiple transformers and CTs interactive effect and its impact on the protective relay[J]. Power System Protection and Control, 2016, 44(23):1-9
[4] 黄建勇, 孟琦斌, 吴顺超, 等. 基于属性数学的配电网运行状态评估[J]. 中国电力, 2019, 52(2):104-110, 118 HUANG Jianyong, MENG Qibin, WU Shunchao, SHI Hui, MA Shushu, et al. Operation state evaluation of distribution network based on attribute mathematics[J]. Electric Power, 2019, 52(2):104-110, 118
[5] 马发轩. 配网用户用电特性市场分析预测应用系统方案设计[J]. 电力系统保护与控制, 2017, 45(12):112-120 MA Faxuan. Schematic design of distribution network users' power consumption features market analysis and forecasting application system[J]. Power System Protection and Control, 2017, 45(12):112-120
[6] 凌晨, 葛宝明, 毕大强. 配电网中的电力电子变压器研究[J]. 电力系统保护与控制, 2012, 40(2):34-39 LING Chen, GE Baoming, BI Daqiang. A power electronic transformer applied to distribution system[J]. Power System Protection and Control, 2012, 40(2):34-39
[7] 熊卿, 张哲, 尹项根, 等. 新型配电变一体化静止无功补偿技术研究[J]. 电力系统保护与控制, 2012, 40(10):59-64 XIONG Qing, ZHANG Zhe, YIN Xianggen, et al. Research on novel technology of distribution transformer and static VAR compensator integration system[J]. Power System Protection and Control, 2012, 40(10):59-64
[8] 李鹏, 李金忠, 崔博源, 等. 特高压交流输变电装备最新技术发展[J]. 高电压技术, 2016, 42(4):1068-1078 LI Peng, LI Jinzhong, CUI Boyuan, et al. Achievements in the newest technology of UHV AC power transmission equipment[J]. High Voltage Engineering, 2016, 42(4):1068-1078
[9] SABIHA N A, LEHTONEN M. Lightning-induced overvoltages transmitted over distribution transformer with MV spark-gap operation:Part I:high-frequency transformer model[J]. IEEE Transactions on Power Delivery, 2010, 25(4):2472-2480.
[10] 张重远, 高黎明, 朱瑞敏. 基于改进图像法的变压器严格无源暂态模型建立方法[J]. 华北电力大学学报(自然科学版), 2014, 41(6):22-26 ZHANG Zhongyuan, GAO Liming, ZHU Ruimin. Research of establishment transformer strictly passive transient model based on the modified image method[J]. Journal of North China Electric Power University(Natural Science Edition), 2014, 41(6):22-26
[11] PORDANJANI I R, CHUNG C Y, MAZIN H E, et al. A method to construct equivalent circuit model from frequency responses with guaranteed passivity[J]. IEEE Transactions on Power Delivery, 2011, 26(1):400-409.
[12] 杜砚, 王晓琪, 汪本进, 等. 具有计量功能的变压器研制[J]. 高电压技术, 2015, 41(3):963-970 DU Yan, WANG Xiaoqi, WANG Benjin, et al. Development of transformers with metering function[J]. High Voltage Engineering, 2015, 41(3):963-970
[13] 彭庆华, 陈龙, 康文斌, 等. 电容式电压互感器谐波测量误差分析[J]. 高电压技术, 2015, 41(3):956-962 PENG Qinghua, CHEN Long, KANG Wenbin, et al. Analysis of harmonic measurement error using capacitive voltage transformer[J]. High Voltage Engineering, 2015, 41(3):956-962
[14] 尹项根, 王祯, 陈玉, 等. 配电变压器集成化补偿系统的多目标分析及控制[J]. 电力系统保护与控制, 2018, 46(9):1-9 YIN Xianggen, WANG Zhen, CHEN YU, et al. Multi-object analysis and control of static synchronous compensators integrated with distribution transformer[J]. Power System Protection and Control, 2018, 46(9):1-9
[15] HERTWIG H. 电感计算[M]. 北京:国防大学出版社, 1960.
[16] 凌子恕. 高压互感器技术手册[M]. 北京:中国电力出版社, 2006. LIN zishu. High voltage instrument transformers technical manual[M]. Beijing, China:China Electric Power Press, 2006.
[17] 肖耀荣, 高祖绵. 互感器原理与设计基础[M]. 沈阳:辽宁科学技术出版社, 2003.
[18] 袁伟群, 栗保明, 孟绍良, 等. 脉冲电容器杂散参数测量研究[J]. 高电压技术, 2003, 29(10):44-46 YUAN Weiqun, LI baoming, MENG Shaoliang, et al. The measurement technology of parasitic parameters of pulse capacitor[J]. High Voltage Engineering, 2003, 29(10):44-46
[19] 耦合电容器及电容分压器:GB/T 19749-2005[S]. 2005. Coupling capacitors and capacitor dividers:GB/T 19749-2005[S]. 2005.
[20] 倪光正. 工程电磁场原理[M]. 北京:高等教育出版社, 2009.