Optimized Loss Reduction Strategy and System Realization of Transformers Based on Three-dimensional Analysis

doi:10.11985/2020.03.014

Abstract

Abstract:

As the main energy consumption component of the substation, the power loss of the main transformers accounts for about 30% of the loss of the power system. And the loss monitoring and loss reduction analysis of main transformer is of great significance to the loss monitoring of substation. Generally, there are some shortcomings in the way of calculating the critical value of separate operation when using the uniform load distribution or direct parameter equivalence. Based on the improved critical partition method, the reduction analysis of two three-winding transformers is optimized, and the optimal reduction strategy of three-winding transformer is proposed. Based on the three-dimensional analysis of splitting operation loss, which further improves the accuracy and effect of loss reduction, a software system for online monitoring and analysis of loss reduction is designed and tested. The loss of transformers in operation can be monitored online and the loss level as well as loss reduction can be analyzed with high precision, which has a positive effect on the actual optimized operation and future load adjustment reference.

Key words: Three-winding transformer, splitting operation, three-dimensional analysis, loss reduction analysis

CLC Number:

TM9
TP392

HUANG Bin,QIN Yifan,LÜ Zhirui,SUN Yunsheng,LONG Kaihua,HAN Huiying. Optimized Loss Reduction Strategy and System Realization of Transformers Based on Three-dimensional Analysis[J]. Journal of Electrical Engineering, 2020, 15(3): 105-112.

Figures/Tables 9

References 20

[1]	中国标准出版社. 电力网电能损耗计算导则：DL/T 686-2018[S]．北京: 中国标准出版社, 2019.
	China Standard Press. Guide of calculation of grid energy loss：DL/T 686-2018[S]. Beijing: China Standard Press, 2019.
[2]	吴安官, 倪保珊. 电力系统线损[M]. 北京: 中国电力出版社, 1996.
	WU Anguan, NI Baoshan. Power system line loss[M]. Beijing: China Electric Power Press, 1996.
[3]	陈珩. 电力系统稳态分析[M]. 北京: 中国电力出版社, 2007.
	CHEN Heng. Steady state analysis of power system[M]. Beijing: China Electric Power Press, 2007.
[4]	熊信银. 电气工程概论[M]. 北京: 中国电力出版社, 2008.
	XIONG Xinyin. Introduction to electrical engineering[M]. Beijing: China Electric Power Press, 2008.
[5]	牛迎水. 电力网降损节能技术应用与案例分析[M]. 北京: 中国电力出版社, 2013.
	NIU Yingshui. Application and case analysis of power grid loss reduction and energy saving technology[M]. Beijing: China Electric Power Press, 2013.
[6]	刘丽平. 电力变压器运行损耗与节能[M]. 北京: 中国电力出版社, 2018.
	LIU Liping. Operation loss and energy saving of power transformer[M]. Beijing: China Electric Power Press, 2018.
[7]	郝治国, 赵学文, 张保会. 变电站变压器经济运行实时监控系统[J]. 继电器, 2002(1):18-21.
	HAO Zhiguo, ZHAO Xuewen, ZHANG Baohui. Reserch on real-time SCADA system for economic operation of transformers in substations[J]. Relay, 2002(1):18-21.
[8]	丁涛, 刘宪林. 电力变压器经济运行控制系统的开发[J]. 电力科学与工程, 2003(4):13-15.
	DING Tao, LIU Xianlin. Development of supervisory control system for economic operation of electric transformers[J]. Electric Power Science and Engineering, 2003(4):13-15.
[9]	李超. 变压器动态经济运行与降损分析[D]. 济南:山东大学, 2011.
	LI Chao. Analysis of transformer dynamic economic operation and loss reducing[D]. Jinan:Shandong University, 2011.
[10]	徐丹. 配电变压器的经济运行方式研究[D]. 北京:华北电力大学, 2013.
	XU Dan. Research about economical operation mode of distribution transformer[D]. Beijing:North China Electric Power University, 2013.
[11]	江泰廷. 变压器经济运行分析决策系统的设计与实现[D]. 成都:电子科技大学, 2013.
	JIANG Taiting. Design and implementation of transformer economic operation analysis and decision-making system[D]. Chengdu:University of Electronic Science and Technology of China, 2013.
[12]	邓颖奇. 变压器经济运行分析与系统开发[D]. 济南:山东大学, 2014.
	DENG Yingqi. Analysis for transformer economic operation and related system development[D]. Jinan:Shandong University, 2014.
[13]	张宇泽, 仝新宇, 王佰淮, 等. 35 kV变压器分列运行最优负载分配[J]. 变压器, 2019,56(4):32-36.
	ZHANG Yuze, TONG Xinyu, WANG Baihuai, et al. Load distribution of 35 kV transformer in parallel operation[J]. Transformers, 2019,56(4):32-36.
[14]	谢宁翔. 基于主动配电网的变电站智能经济运行理论与实践[D]. 南京:东南大学, 2015.
	XIE Ningxiang. Intelligent and economic operation of a substation based on active distribution network:Theory and practice[D]. Nanjing:Southeast University, 2015.
[15]	夏春燕. 变压器经济运行分析与应用[J]. 变压器, 2007(12):24-28.
	XIA Chunyan. Analysis and application of transformer economic operation[J]. Transformers, 2007(12):24-28.
[16]	王成福. 变压器经济寿命评估及经济运行方式优选的方法研究[D]. 哈尔滨:哈尔滨工业大学, 2008.
	WANG Chengfu. Method of economic life assessment and economic operate optimization of transformer[D]. Harbin:Harbin Institute of Technology, 2008.
[17]	曹志平. 大型配电变压器经济运行的研究[D]. 太原:太原理工大学, 2005.
	CAO Zhiping. Economic operation study on the distribution transformer[D]. Taiyuan:Taiyuan University of Technology, 2005.
[18]	肖珂. 配电网变压器经济运行方式优化及控制算法分析[D]. 锦州:辽宁工业大学, 2016.
	XIAO Ke. Optimization of economic operation of distribution network transformers and analysis of its control algorithm[D]. Jinzhou:Liaoning University of Technology, 2016.
[19]	吕新, 于胜斌. 大容量变压器绝缘结构的研究[J]. 电气工程学报, 2019,14(3):115-118. doi: 10.11985/2019.03.017
	LÜ Xin, YU Shengbin. Study on insulation structure of large capacity transformer[J]. Journal of Electrical Engineering, 2019,14(3):115-118. doi: 10.11985/2019.03.017
[20]	高有华, 宋佳, 杜翰文, 等. VFTO对电力变压器绕组暂态电压分布的影响研究[J]. 电气工程学报, 2018,13(10):6-10.
	GAO Youhua, SONG Jia, DU Hanwen, et al. Study of the transient voltage distribution of the transformer windings caused by VFTO[J]. Journal of Electrical Engineering, 2018,13(10):6-10.

主变编号	额定容量/MVA	额定电压/kV	空载损耗/kW	空载电流(%)	短路损耗(未归算)/kW				150 MVA时阻抗电压百分比(%)
主变编号	额定容量/MVA	额定电压/kV	空载损耗/kW	空载电流(%)	高—中	高—低	中—低		高—中	高—低	中—低
1(A)	150, 150, 75	230, 121, 38.5	54.00	0.14	356.80	284.40	281.00	9.06		31.80	22.20
2(B)	150, 150, 75	230, 121, 38.5	49.24	0.04	326.47	252.75	236.43	8.71		32.46	22.15

主变编号	二次有功 /MW	二次无功 /MVar	三次有功 /MW	三次无功 /MVar
1(A)	68.00	14.24	4.48	1.36
2(B)	25.25	5.13	10.31	2.10

负载条件	低压当前负载	中压当前负载
负载范围	低压当前负载	中压当前负载
0<中压<85 MVA	B独立运行	—
中压>85 MVA	并联运行	—
0<低压<12.5 MVA	—	A独立运行
12.5 MVA<低压<72.5 MVA	—	B独立运行
低压>72.5 MVA	—	并联运行

当前中压、低压总负载	当前运行	推荐运行 (最佳)
运行方式	分列运行	分列运行
中压系数	0.73	0.45
低压系数	0.31	0.40
总损耗功率	206.5	190.5
总损耗率(%)	0.191	0.176

主变编号	二次有功 /MW	二次无功 /MVar	三次有功 /MW	三次无功 /MVar
1(A)	69.82	14.17	7.53	1.51
2(B)	23.08	6.73	7.37	1.49