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With the increasing penetration of new energy in new power system, the influence of the uncertainty of wind power output and the correlation with load on the system operation is increasingly prominent. Thus, the conventional transformer risk assessment can no longer meet the demand. Based on Copula model and Susa model, a joint probability assessment method of transformer operation risk considering wind power and load correlation is proposed. Monte Carlo method is used to calculate each risk index value and evaluate transformer operation risk. The research results show that, the conventional transformer evaluation system that does not consider the wind-load correlation will lead to a low overall risk assessment result, with the maximum error of the index up to 55.02%. Also, with the increase of wind-load correlation, the risk of thermal defects of the transformer is increasing. The research conclusions can assist to improve the accuracy of the operation risk level assessment of new power system transformers, and provide a reference for the later transformer condition assessment and maintenance plan formulation.

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高比例新能源的逐步接入改变了电力系统的运行方式,新能源接入配网侧的变压器运行环境也发生了极大改变,基于传统电力系统“源随荷动”的变压器风险评估体系已无法满足现有新型电力系统“源荷互动”的评估需求。基于Copula模型与变压器Susa模型,建立风电接入的新能源配电网中“源”“荷”新型相关性模型,并引入绝缘劣化概率等指标,提出了一种考虑风电-负荷相关性的变压器运行风险联合概率评估方法,利用蒙特卡罗法计算各个风险指标值并对变压器运行风险进行评估。研究结果表明,传统不考虑“源”“荷”相关性的变压器评估体系会导致整体风险评估结果偏低,指标最高误差可达55.02%,且随着相关性提升,变压器热缺陷风险不断增加。研究结论可辅助提升新型电力系统变压器运行风险等级评估准确度,为今后变压器状态评估与检修计划制定提供参考。

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甘艳(1976),女,博士,教授级高级工程师,主要研究方向为智能电网输变电设备在线监测理论与关键技术,

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甘艳(1976),女,博士,教授级高级工程师,主要研究方向为智能电网输变电设备在线监测理论与关键技术,

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考虑源荷相关性的风电接入配电变压器风险联合概率评估
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甘艳 1 , 何靖萱 2 , 邹建明 1 , 吕华林 1 , 杜志叶 2 , 蔡泓威 2 , 黄菁雯 2
热力发电 | 发电技术论坛 2023,52(9): 162-170
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热力发电 | 发电技术论坛 2023, 52(9): 162-170
考虑源荷相关性的风电接入配电变压器风险联合概率评估
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甘艳1 , 何靖萱2, 邹建明1, 吕华林1, 杜志叶2, 蔡泓威2, 黄菁雯2
作者信息
  • 1.国家电网公司华中分部,湖北 武汉 730074
  • 2.武汉大学电气与自动化学院,湖北 武汉 730072
  • 甘艳(1976),女,博士,教授级高级工程师,主要研究方向为智能电网输变电设备在线监测理论与关键技术,

Joint probabilistic risk assessment of wind power transformer connected to distribution networks considering source-load correlation
Yan GAN1 , Jingxuan HE2, Jianming ZOU1, Hualin LYU1, Zhiye DU2, Hongwei CAI2, Jingwen HUANG2
Affiliations
  • 1.Central China Branch of State Grid Corporation, Wuhan 730074, China
  • 2.School of Electrical Engineering and Automation, Wuhan University, Wuhan 730072, China
出版时间: 2023-09-25 doi: 10.19666/j.rlfd.202212233
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高比例新能源的逐步接入改变了电力系统的运行方式,新能源接入配网侧的变压器运行环境也发生了极大改变,基于传统电力系统“源随荷动”的变压器风险评估体系已无法满足现有新型电力系统“源荷互动”的评估需求。基于Copula模型与变压器Susa模型,建立风电接入的新能源配电网中“源”“荷”新型相关性模型,并引入绝缘劣化概率等指标,提出了一种考虑风电-负荷相关性的变压器运行风险联合概率评估方法,利用蒙特卡罗法计算各个风险指标值并对变压器运行风险进行评估。研究结果表明,传统不考虑“源”“荷”相关性的变压器评估体系会导致整体风险评估结果偏低,指标最高误差可达55.02%,且随着相关性提升,变压器热缺陷风险不断增加。研究结论可辅助提升新型电力系统变压器运行风险等级评估准确度,为今后变压器状态评估与检修计划制定提供参考。

源荷相关性  /  风电-负荷相关性  /  变压器  /  Copula函数  /  蒙特卡罗法

With the increasing penetration of new energy in new power system, the influence of the uncertainty of wind power output and the correlation with load on the system operation is increasingly prominent. Thus, the conventional transformer risk assessment can no longer meet the demand. Based on Copula model and Susa model, a joint probability assessment method of transformer operation risk considering wind power and load correlation is proposed. Monte Carlo method is used to calculate each risk index value and evaluate transformer operation risk. The research results show that, the conventional transformer evaluation system that does not consider the wind-load correlation will lead to a low overall risk assessment result, with the maximum error of the index up to 55.02%. Also, with the increase of wind-load correlation, the risk of thermal defects of the transformer is increasing. The research conclusions can assist to improve the accuracy of the operation risk level assessment of new power system transformers, and provide a reference for the later transformer condition assessment and maintenance plan formulation.

source charge correlation  /  wind power-load correlation  /  transformer  /  Copula function  /  Monte Carlo method
甘艳, 何靖萱, 邹建明, 吕华林, 杜志叶, 蔡泓威, 黄菁雯. 考虑源荷相关性的风电接入配电变压器风险联合概率评估. 热力发电, 2023 , 52 (9) : 162 -170 . DOI: 10.19666/j.rlfd.202212233
Yan GAN, Jingxuan HE, Jianming ZOU, Hualin LYU, Zhiye DU, Hongwei CAI, Jingwen HUANG. Joint probabilistic risk assessment of wind power transformer connected to distribution networks considering source-load correlation[J]. Thermal Power Generation, 2023 , 52 (9) : 162 -170 . DOI: 10.19666/j.rlfd.202212233
  • 国家自然科学基金项目(51977152)
  • 国家电网公司华中分部科技项目(5214AJ220017)
2023年第52卷第9期
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文章信息
doi: 10.19666/j.rlfd.202212233
  • 首发时间:2026-01-26
  • 出版时间:2023-09-25
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  • 修回日期:2022-12-13
基金
National Natural Science Foundation of China(51977152)
国家自然科学基金项目(51977152)
Science and Technology Project of Central China Branch of State Grid Corporation of China(5214AJ220017)
国家电网公司华中分部科技项目(5214AJ220017)
作者信息
    1.国家电网公司华中分部,湖北 武汉 730074
    2.武汉大学电气与自动化学院,湖北 武汉 730072
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https://castjournals.cast.org.cn/joweb/rlfd/CN/10.19666/j.rlfd.202212233
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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