| 引用本文: | 朱柳慧,盛戈皞,白万建,陈 静,刘亚东,崔荣花,江秀臣.考虑热点温度的并列变压器经济安全优化运行策略[J].电力自动化设备,2013,33(10): |
| ZHU Liuhui,SHENG Gehao,BAI Wanjian,CHEN Jing,LIU Yadong,CUI Ronghua,JIANG Xiuchen.Economic and safe operation of parallel transformer considering hottest-spot temperature[J].Electric Power Automation Equipment,2013,33(10): |
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| 摘要: |
| 考虑热点温度的实时变化，提出了一种确保变压器安全的并列变压器过负荷运行策略。根据实际运行负荷的变化规律，将日负荷曲线分为高峰负荷运行时段和低谷负荷运行时段。在高峰负荷运行时段，除考虑经济运行的功率损耗最小的约束外，兼顾变压器热点温度因素，来获得经济运行方式及并列切换时间。该策略根据环境温度和负荷曲线，采用微分方程法估计变压器热点温度，并通过二分法搜索最优的切换时间。对2台不同容量三绕组变压器并列运行的算例分析表明，所提优化运行方法在降低损耗的同时，能够保证变压器的安全运行。 |
| 关键词: 变压器 热点温度 并列运行 过负荷 寿命评估 |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（SS2012AA050803）；上海市科学技术委员会资助项目（10dz1203000） |
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| Economic and safe operation of parallel transformer considering hottest-spot temperature |
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ZHU Liuhui1, SHENG Gehao1, BAI Wanjian2, CHEN Jing2, LIU Yadong1, CUI Ronghua2, JIANG Xiuchen1
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1.Department of Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;2.Heze Power Supply Company，Shandong Electric Power Corporation，Heze 274000，China
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| Abstract: |
| An operating strategy considering the real-time variation of hottest-spot temperature is proposed to ensure the safety of parallel power transformer during overload operation. The daily load curve is divided into high-load period and low-load period according to the actual load variation. During the high-load period，both the minimum power loss of economic operation and the temperature rise of transformer hottest-spot should be considered，by which，the economic operating mode and the switching time of parallel power transformers can be determined. It applies the finite difference method to estimate the hottest-spot temperature according to the load curve and ambient temperature and adopts the binary searching method to obtain the optimal switching time. Analysis of two three-winding transformers with different capacities and running in parallel shows that，the proposed strategy ensures the safe operation of transformers as well as reduces the transformer loss. |
| Key words: power transformers hottest-spot temperature parallel operation overload life assessment |
