Differentiated Governance Strategies for Distribution Transformer Overload and Three-Phase Imbalance Considering Source-Load Regulation

doi:10.11930/j.issn.1004-9649.202501016

Abstract

Abstract:

Aiming at the mixed problems of three-phase imbalance and heavy overload of distribution transformers caused by large-scale access of single-phase distributed photovoltaic and single-phase charging piles, a differentiated governance strategy for heavy overload and three-phase imbalance of distribution transformers considering source-load regulation is proposed. Firstly, a substation imbalance and heavy overload model considering the randomness of photovoltaic charging is established, and the influence of the uncertainty of photovoltaic output and charging behavior on the three-phase imbalance and heavy overload of the substation is analyzed. Secondly, a substation evaluation and clustering model considering the potential of source-load regulation is established, and the substations with the potential of source-load regulation are mined as control clusters; finally, a substation regulation model considering three-phase imbalance and heavy overload is established, with three-phase imbalance, load rate and network loss as the objective function, considering the coordinated control of aggregated photovoltaic control, aggregated charging power control, energy storage and reactive power compensation, and solving it by NSGA-Ⅱ algorithm and maximum fuzzy satisfaction method. The IEEE33 node example model is used for simulation verification, and the results show that this method can effectively manage the mixed problems of three-phase imbalance and heavy overload in the substation.

Key words: distribution transformer, overload, three-phase Imbalance

YANG Qiang, LUO Yingting, SHI Mo, JIANG Junfei, RUAN Dihang, LIU Shengyang, YAN Qin, MA Rui. Differentiated Governance Strategies for Distribution Transformer Overload and Three-Phase Imbalance Considering Source-Load Regulation[J]. Electric Power, 2025, 58(8): 41-49.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202501016

https://www.electricpower.com.cn/EN/Y2025/V58/I8/41

Figures/Tables 13

References 32

1	吴岩, 王光政. 基于CiteSpace的配电网韧性评估与提升研究综述与展望[J]. 中国电力, 2023, 56 (12): 100- 112, 137. DOI
	WU Yan, WANG Guangzheng. Review and prospect of distribution network resilience assessment and improvement based on CiteSpace[J]. Electric Power, 2023, 56 (12): 100- 112, 137. DOI
2	王金丽, 李丰胜, 解芳, 等. “双碳” 战略背景下新型配电系统技术标准体系[J]. 中国电力, 2023, 56 (5): 22- 31. DOI
	WANG Jinli, LI Fengsheng, XIE Fang, et al. Research on technical standard system of new distribution system under double-carbon strategy[J]. Electric Power, 2023, 56 (5): 22- 31. DOI
3	周洋, 黄德志, 李培栋, 等. 考虑平衡端点相位不对称及光伏接入的低压配电网三相潮流模型[J]. 中国电力, 2024, 57 (10): 190- 198. DOI
	ZHOU Yang, HUANG Dezhi, LI Peidong, et al. A three-phase power flow model for low-voltage distribution networks considering balanced bus phase asymmetry and photovoltaic access[J]. Electric Power, 2024, 57 (10): 190- 198. DOI
4	张怡, 郝思鹏. 电动汽车充电站变压器容量及储能优化配置[J]. 电测与仪表, 2023, 60 (7): 19- 25.
	ZHANG Yi, HAO Sipeng. Optimized configuration of transformer capacity and energy storage for electric vehicle charging stations[J]. Electrical Measurement & Instrumentation, 2023, 60 (7): 19- 25.
5	李彬, 田珂, 陈淑娇, 等. 面向新型电力负荷管理的多层级动态调控方案设计与技术研究[J]. 内蒙古电力技术, 2023, 41 (5): 3- 11.
	LI Bin, TIAN Ke, CHEN Shujiao, et al. Design and technical research of multi-level dynamic regulation scheme for new power load management[J]. Inner Mongolia Electric Power, 2023, 41 (5): 3- 11.
6	来子晗, 温富光. 基于正序瞬时功率算法的宽频振荡检测技术[J]. 浙江电力, 2024, 43 (1): 12- 19.
	LAI Zihan, WEN Fuguang. A wideband oscillation detection technology based on positive sequence instantaneous power algorithm[J]. Zhejiang Electric Power, 2024, 43 (1): 12- 19.
7	张冬冬, 李芳凝, 刘天皓. 新型电力系统负荷预测关键技术及多元场景应用[J]. 综合智慧能源, 2025, 47 (3): 47- 61. DOI
	ZHANG Dongdong, LI Fangning, LIU Tianhao. Key technologies for load forecasting in new power systems and their applications in diverse scenario[J]. Integrated Intelligent Energy, 2025, 47 (3): 47- 61. DOI
8	王瑜, 邱凌键, 储学立, 等. 配电网投资纵横向分配策略及其校验[J]. 浙江电力, 2024, 43 (2): 69- 78.
	WANG Yu, QIU Lingjian, CHU Xueli, et al. A vertical and horizontal allocation strategy of distribution network investment and its verification[J]. Zhejiang Electric Power, 2024, 43 (2): 69- 78.
9	杨婧暄, 张驰. 基于并网逆变器控制的配网电能质量治理模型[J]. 东北电力大学学报, 2024, 44 (5): 57- 62.
	YANG Jingxuan, ZHANG Chi. Distribution network power quality management model based on grid-vonnected inverter control[J]. Journal of Northeast Electric Power University, 2024, 44 (5): 57- 62.
10	陈庆, 柳雨生, 段练达, 等. 大语言模型融合知识图谱的风电运维问答系统研究[J]. 综合智慧能源, 2024, 46 (9): 61- 68. DOI
	CHEN Qing, LIU Yusheng, DUAN Lianda, et al. Research on a wind power operation and maintenance Q & A system based on large language models and knowledge graphs[J]. Integrated Intelligent Energy, 2024, 46 (9): 61- 68. DOI
11	卢俞帆, 刘念, 高舜安. 融合信息物理社会因素的配电网可靠性评估方法[J]. 电力系统自动化, 2024, 48 (3): 51- 61. DOI
	LU Yufan, LIU Nian, GAO Shun’an. Reliability assessment method for distribution network incorporating cyber-physical-social factors[J]. Automation of Electric Power Systems, 2024, 48 (3): 51- 61. DOI
12	朱智, 张永宏, 吕帅, 等. 基于数据通信建模技术的移动式智能变电站安措防误预警系统研究与应用[J]. 内蒙古电力技术, 2023, 41 (4): 54- 59.
	ZHU Zhi, ZHANG Yonghong, LV Shuai, et al. Research and application on security precaution misoperation early warning system of mobile intelligent substation based on data communication modeling technology[J]. Inner Mongolia Electric Power, 2023, 41 (4): 54- 59.
13	王强钢, 郭莹霏, 莫复雪, 等. 计及变压器短期急救负载的城市高压配电网负荷优化分配[J]. 电力系统自动化, 2023, 47 (19): 106- 115. DOI
	WANG Qianggang, GUO Yingfei, MO Fuxue, et al. Optimal load distribution of urban high-voltage distribution network considering short-term emergency loading of transformer[J]. Automation of Electric Power Systems, 2023, 47 (19): 106- 115. DOI
14	黄晶, 王秀丽, 邵成成, 等. 考虑新能源配网三相不平衡治理的电动汽车充电策略[J]. 电网技术, 2024, 48 (9): 3663- 3672.
	HUANG Jing, WANG Xiuli, SHAO Chengcheng, et al. Charging strategy of electric vehicles considering three-phase unbalance mitigation of distribution network with new energy[J]. Power System Technology, 2024, 48 (9): 3663- 3672.
15	蔡永翔, 杨安黔, 付宇, 等. 面向分布式光伏并网和电能替代的低压配电网自适应控制[J]. 可再生能源, 2023, 41 (10): 1343- 1351. DOI
	CAI Yongxiang, YANG Anqian, FU Yu, et al. An adaptive control facing to distributed PV integration and electricity substitution in LV distribution networks[J]. Renewable Energy Resources, 2023, 41 (10): 1343- 1351. DOI
16	缪伟, 任思源, 庞英俊, 等. 基于配电网三相不平衡问题的多目标优化调节策略研究[J]. 智能电网, 2017, 5 (1): 69- 74.
	MIAO Wei, REN Siyuan, PANG Yingjun, et al. Study on multi-objective optimal regulation strategy based on three-phase unbalance in distribution network[J]. Smart Grid, 2017, 5 (1): 69- 74.
17	陈家超, 李钦豪, 唐渊, 等. 考虑光伏选相投切的低压配电网三相平衡优化[J]. 电力自动化设备, 2022, 42 (4): 71- 78.
	CHEN Jiachao, LI Qinhao, TANG Yuan, et al. Three-phase balance optimization of low-voltage distribution network considering photovoltaic phase selection and switching[J]. Electric Power Automation Equipment, 2022, 42 (4): 71- 78.
18	彭伟亮, 梁细恒, 邓才波, 等. 基于电池储能装置的配电变压器重过载治理与功率因数提升方法[J]. 广东电力, 2022, 35 (2): 36- 43. DOI
	PENG Weiliang, LIANG Xiheng, DENG Caibo, et al. Heavy overload control and power factor improvement method of distribution transformer based on battery energy storage device[J]. Guangdong Electric Power, 2022, 35 (2): 36- 43. DOI
19	黄欣, 赵敏彤, 郇嘉嘉, 等. 基于BWO-DBSCAN和CSA-OCRKELM的变电站数据流异常检测方法[J]. 广东电力, 2023, 36 (5): 39- 48. DOI
	HUANG Xin, ZHAO Mintong, HUAN Jiajia, et al. Research on anomaly detection method of substation data flow based on BWO-DBSCAN and CSA-OCRKELM[J]. Guangdong Electric Power, 2023, 36 (5): 39- 48. DOI
20	张旭, 王淳, 胡奕涛, 等. 面向短时过载及长期轻载的配变侧储能配置与调度双层优化[J]. 中国电力, 2025, 58 (1): 174- 184. DOI
	ZHANG Xu, WANG Chun, HU Yitao, et al. Dual-layer optimization of distribution transformer side energy storage configuration and dispatching for short-term overload and long-term light load[J]. Electric Power, 2025, 58 (1): 174- 184. DOI
21	李志浩, 倪筹帷, 陈哲, 等. 考虑信息交互的微电网群分布式经济调度方法[J]. 浙江电力, 2023, 42 (10): 8- 16.
	LI Zhihao, NI Chouwei, CHEN Zhe, et al. Distributed economic dispatching method for microgrid clusters considering information interaction[J]. Zhejiang Electric Power, 2023, 42 (10): 8- 16.
22	GE L J, LIAO W L, WANG S X, et al. Modeling daily load profiles of distribution network for scenario generation using flow-based generative network[J]. IEEE Access, 2020, 8, 77587- 77597. DOI
23	杨波, 陈卫, 文明浩, 等. 电动汽车充电站的概率负荷建模[J]. 电力系统自动化, 2014, 38 (16): 67- 73. DOI
	YANG Bo, CHEN Wei, WEN Minghao, et al. Probabilistic load modeling of electric vehicle charging stations[J]. Automation of Electric Power Systems, 2014, 38 (16): 67- 73. DOI
24	王洪彬, 曾星星, 张友强, 等. 智能变电站二次设备状态的灰色层次聚类评估[J]. 重庆大学学报, 2016, 39 (3): 28- 36. DOI
	WANG Hongbin, ZENG Xingxing, ZHANG Youqiang, et al. Grey hierarchy cluster assessment on the operating condition of intelligent substation secondary equipment[J]. Journal of Chongqing University, 2016, 39 (3): 28- 36. DOI
25	周奇. 考虑能量枢纽需求响应的主动配电网安全距离分析[D]. 长沙理工大学, 2022.
	ZHOU Qi. Safety distance analysis of active distribution network considering energy hub demand response[D]. Changsha University of Science and Technology, 2022.
26	胡志强, 叶远誉, 俞林刚, 等. 主动负荷参与的低压台区三相负荷不平衡自动均衡方法[J]. 中国电力, 2024, 57 (2): 49- 54. DOI
	HU Zhiqiang, YE Yuanyu, YU Lingang, et al. Active load participation in automatic balancing of three-phase load imbalance in low-voltage substation areas[J]. Electric Power, 2024, 57 (2): 49- 54. DOI
27	崔再岳, 杨扬, 王立地. 考虑负荷需求响应的配电网三相不平衡优化[J]. 综合智慧能源, 2025, 47 (3): 92- 101. DOI
	CUI Zaiyue, YANG Yang, WANG Lidi. Three-phase unbalance optimization of distribution network considering load demand response[J]. Integrated Intelligent Energy, 2025, 47 (3): 92- 101. DOI
28	赵慧荣, 李天晨, 周全, 等. 计及设备变工况能效非线性的综合能源系统精细化协同优化运行方法[J]. 综合智慧能源, 2023, 45 (10): 1- 9. DOI
	ZHAO Huirong, LI Tianchen, ZHOU Quan, et al. Refined collaborative optimized operation of integrated energy systems considering nonlinear energy efficiency of equipment under variable operating conditions[J]. Integrated Intelligent Energy, 2023, 45 (10): 1- 9. DOI
29	曹杭涛, 章勇, 蒋宁, 等. 一种电动汽车“预约充/放电” 模式的优化配置方案[J]. 浙江电力, 2024, 43 (5): 35- 42.
	CAO Hangtao, ZHANG Yong, JIANG Ning, et al. An optimal configuration scheme for "scheduled charging and discharging" mode of electric vehicles[J]. Zhejiang Electric Power, 2024, 43 (5): 35- 42.
30	王方敏, 顼佳宇, 苏宁, 等. 新型电力系统风险抑制下分布式光伏承载力概率评估方法[J]. 中国电力, 2025, 58 (6): 33- 44.
	WANG Fangmin, XU Jiayu, SU Ning, et al. Probability evaluation method of distributed photovoltaic carrying capacity under risk suppression in new power system[J]. Electric Power, 2025, 58 (6): 33- 44.
31	邱革非, 杨浩宇, 何超, 等. 计及三相不平衡的有源配电网重构[J]. 内蒙古电力技术, 2023, 41 (2): 14- 22.
	QIU Gefei, YANG Haoyu, HE Chao, et al. Active distribution network reconfiguration considering three-phase imbalance[J]. Inner Mongolia Electric Power, 2023, 41 (2): 14- 22.
32	姜楠楠, 王文浩, 蔺家骏, 等. 基于泄漏电流三相不平衡度的避雷器在线监测优化方案[J]. 浙江电力, 2024, 43 (5): 116- 124.
	JIANG Nannan, WANG Wenhao, LIN Jiajun, et al. An optimal online monitoring scheme for lightening arresters based on the threephase imbalance of leakage current[J]. Zhejiang Electric Power, 2024, 43 (5): 116- 124.

运维特性	说明	计算方法
重过载次数	负载率大于80%持续15 min记一次	一个月内总次数
重过载累计时间	负载率大于80%累计时间	一个月内累计总时间
最大负载率	一个月内最大负载率	$ \dfrac{变压器最大负荷}{变压器容量}\times 100\text{%} $
三相不平衡次数	三相不平衡度大于15%持续超过15 min记一次	一个月内总次数
三相不平衡累计时间	三相不平衡度大于15%累计时间	一个月内累计总时间
最大不平衡度	一个月内最大三相不平衡度	$ \dfrac{最大相电流\text{-}最小相电流}{最大相电流}\times 100\text{%} $
台区光伏渗透率	反应光伏出力在台区中占比	$ \dfrac{台区光伏装机容量}{变压器最大负荷}\times 100\text{%} $
台区充电桩渗透率	反应充电负荷在台区中占比	$ \dfrac{台区充电桩容量}{变压器最大负荷}\times 100\text{%} $
光伏三相接入不平衡率	反应分布式光伏的不平衡接入	$ \dfrac{最大相光伏容量-最小相光伏容量}{最大相光伏容量}\times 100\text{%} $
充电桩三相接入不平衡率	反应充电桩的不平衡接入	$ \dfrac{最大相充电桩容量-最小相充电桩容量}{最大相充电桩容量}\times 100\text{%} $

运维特性	说明	计算方法
重过载次数	负载率大于80%持续15 min记一次	一个月内总次数
重过载累计时间	负载率大于80%累计时间	一个月内累计总时间
最大负载率	一个月内最大负载率	$ \dfrac{变压器最大负荷}{变压器容量}\times 100\text{%} $
三相不平衡次数	三相不平衡度大于15%持续超过15 min记一次	一个月内总次数
三相不平衡累计时间	三相不平衡度大于15%累计时间	一个月内累计总时间
最大不平衡度	一个月内最大三相不平衡度	$ \dfrac{最大相电流\text{-}最小相电流}{最大相电流}\times 100\text{%} $
台区光伏渗透率	反应光伏出力在台区中占比	$ \dfrac{台区光伏装机容量}{变压器最大负荷}\times 100\text{%} $
台区充电桩渗透率	反应充电负荷在台区中占比	$ \dfrac{台区充电桩容量}{变压器最大负荷}\times 100\text{%} $
光伏三相接入不平衡率	反应分布式光伏的不平衡接入	$ \dfrac{最大相光伏容量-最小相光伏容量}{最大相光伏容量}\times 100\text{%} $
充电桩三相接入不平衡率	反应充电桩的不平衡接入	$ \dfrac{最大相充电桩容量-最小相充电桩容量}{最大相充电桩容量}\times 100\text{%} $

标度		含义
1		两个指标同等重要
3		一个指标略微重要于另一个
5		一个指标明显重要于另一个
7		一个指标显著重要于另一个
9		一个指标极其重要于另一个
2，4，6，8		2、4、6、8 表示两个指标在相邻情况之间的差异之间

标度		含义
1		两个指标同等重要
3		一个指标略微重要于另一个
5		一个指标明显重要于另一个
7		一个指标显著重要于另一个
9		一个指标极其重要于另一个
2，4，6，8		2、4、6、8 表示两个指标在相邻情况之间的差异之间

[1]	WANG Zhen, DING Xiaohua, YU Kun, ZHAO Jingtao, HUANG Kun, LI Yuan, WU Junxing. Regulation Potential Range Modeling for Distribution Transformer Zones Considering Autonomous Operation Optimization [J]. Electric Power, 2025, 58(10): 97-109.
[2]	Xu ZHANG, Chun WANG, Yitao HU, Ruikai CHEN, Kun LIU, Zhidong GUO, Junxun ZHONG. Dual-Layer Optimization of Distribution Transformer Side Energy Storage Configuration and Dispatching for Short-Term Overload and Long-Term Light Load [J]. Electric Power, 2025, 58(1): 174-184.
[3]	SHEN Peifeng, WANG Xuyan, ZHANG Haoliang, WEI Zhinong, XU Guangkai, SUN Guoqiang. Risk Assessment of Low-Voltage Interconnected Distribution Districts Considering Large-Scale Fast Charging Load [J]. Electric Power, 2021, 54(5): 56-64.
[4]	WU Qiong, YU Wencheng, HONG Haisheng, YU Lei, DUAN Lian, SHANG Mingyuan, LIU Zhe. Probability Prediction of Low-voltage Tripping Failures in Distribution Transformer Station Areas Based on XGBoost Algorithm [J]. Electric Power, 2020, 53(4): 105-113.
[5]	LI Yongxia, GONG Yulei, GUO Xiuxiao, ZHAO Yanyan. Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network [J]. Electric Power, 2020, 53(3): 52-58.
[6]	WANG Jinli, MA Zhao, PAN Xu, WANG Li. On-load Tap-changing Technology of Distribution Transformer [J]. Electric Power, 2018, 51(5): 75-79,100.
[7]	XU Xing, TAN Rui, LI Yongsheng, CAI Pei, HUANG Qilong, MA Xiaofeng. Analysis on Primary Frequency Regulation of 1 000-MW Double-Reheat Ultra-Supercritical Units [J]. Electric Power, 2018, 51(2): 169-175.
[8]	CHENG Ling, WEI Jianxiao, MA Guang, YANG Fuyao, CHEN Xin, ZHU Chengzhi. Performance Assessment of Used Grain-Oriented Silicon Steel Sheet in Distribution Transformer and Its Inspection Technique [J]. Electric Power, 2016, 49(2): 73-77.
[9]	CHENG Gaihong, YIN Weiyang. Design of Belo Monte UHVDC Transmission Project in Brazil [J]. journal1, 2015, 48(7): 22-26.
[10]	YANG Zhen-li. Solutions to Generation Output Constrained by Power Line Transmission Capabilities [J]. Electric Power, 2014, 47(9): 18-24.
[11]	WANG Yi, ZHANG Xuan, DONG Yi-feng, WANG Hong-fu, HOU Jun-xian. A Static Security Analysis Method for Cascading Overload Trips Considering Automatic Device Simulation [J]. Electric Power, 2014, 47(6): 38-42.
[12]	LI Zhi-gang, DONG Fang-zhou, LI Yu, CAI Wei, LIU Liang, WEI Ran, LU Jing. Simulation and Analysis of Short-Circuit Impact Test of Series Capacitors [J]. Electric Power, 2014, 47(3): 101-106.
[13]	WAN Zhong-hai, LU Jin, CHEN Wen, YAN Tao, WU Yang-hui. Research on Variable Pressure Operating Characteristics of Throttling Units with Additional Supplying Steam at Overload [J]. Electric Power, 2012, 45(12): 16-20.