山东电力技术2026，Vol.53Issue(5)：69-82,14.DOI:10.20097/j.cnki.issn1007-9904.250104
反向过载下计及变压器健康运行的配电网协同管理策略
Coordinated Management Strategy for Distribution Networks Considering Transformer Health Under Reverse Overload Conditions
摘要
Abstract
With the introduction of carbon neutrality goals,the integration of large-scale renewable energy sources,such as solar and wind power,into the distribution network has led to an imbalance between the"generation-load"in the distribution network.On one hand,when the output power of renewable energy exceeds the load,reverse power flow between the transmission and distribution networks occurs,causing voltage security issues in the distribution network.On the other hand,when the output power from renewable energy significantly exceeds the load,transformers experience overloading or excessive loading,which diminishes the reliability of equipment operation.Since the capacity of transformers is difficult to change after installation,this paper proposes a collaborative management strategy to ensure the healthy operation of transformers in the new power system under reverse power flow overload conditions.First,a transformer usable life surface model is established based on the thermal life loss calculation model derived from the load guide.This model is then transformed and simplified using a feasible domain convexification method.Second,considering the bidirectional power flow characteristics of transformers,a comprehensive active and reactive power regulation model for the distribution network is developed.Finally,to minimize the operation cost of the distribution network,the collaborative management results for different ambient temperatures and expected transformer relative aging rates are obtained.Under the condition of ensuring voltage safety in the distribution network,overload management of transformers is performed.Case results demonstrate that maintaining transformer maximum reverse load coefficients no lower than 1.213,1.11,and 1.01 under 140%penetration scenarios at 20℃,25℃,and 30℃ respectively balances lifespan and economy.关键词
变压器/新型电力系统/配电网/反向过载/协同调度Key words
transformer/new power system/distribution network/reverse overload/collaborative dispatch分类
信息技术与安全科学引用本文复制引用
顾朝亮,朱孟兆,朱文兵,朱庆东,方斯顿..反向过载下计及变压器健康运行的配电网协同管理策略[J].山东电力技术,2026,53(5):69-82,14.基金项目
国家电网有限公司科技项目"高比例新能源接入潮流频繁切换下变压器运行性能提升关键技术研究"(5500-202316535A-3-2-ZN).Supported by Science and Technology Project of State Grid Corporation of China"Research on Key Technologies for Enhancing Transformer Operating Performance Under Frequent Power Flow Switching With High Proportion of Renewable Energy Integration"(5500-202316535A-3-2-ZN). （5500-202316535A-3-2-ZN）
