| 引用本文: | 雷淇,王晓阳,刘亚东,于芮技,石东源,李银红.适用于后备保护整定计算的阶段式发电机模型[J].电力自动化设备,2019,39(1): |
| LEI Qi,WANG Xiaoyang,LIU Yadong,YU Ruiji,SHI Dongyuan,LI Yinhong.Stage generator model for backup protection setting calculation[J].Electric Power Automation Equipment,2019,39(1): |
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| 适用于后备保护整定计算的阶段式发电机模型 |
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雷淇1,2, 王晓阳3, 刘亚东3, 于芮技4, 石东源1,2, 李银红1,2
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1.华中科技大学 电气与电子工程学院 强电磁工程与新技术国家重点实验室，湖北 武汉 430074;2.华中科技大学 电气与电子工程学院 电力安全与高效湖北省重点实验室，湖北 武汉 430074;3.中国电力科学研究院 电网安全与节能国家重点实验室，北京 100192;4.国网徐州供电公司，江苏 徐州 221000
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| 摘要: |
| 目前，保护整定计算中，发电机常采用次暂态模型来简化计算，但该模型未考虑短路电流随时间的衰减，而后备保护具有延时特性，采用发电机次暂态模型进行后备保护整定计算将降低保护定值的精度。为提高后备保护整定计算的精度，提出了阶段式发电机模型，基于在后备保护典型时间节点处获取线路故障时发电机输出的电气量特性，得到该时间段等效的发电机静态模型，继而构成适用于后备保护整定计算的阶段式发电机模型。最后，在IEEE 39节点系统中仿真验证了该模型可以进一步提高后备保护整定计算的定值精度。 |
| 关键词: 继电保护 后备保护 保护整定计算 阶段式发电机模型 短路电流 助增系数 |
| DOI：10.16081/j.issn.1006-6047.2019.01.027 |
| 分类号:TM77 |
| 基金项目:国家电网公司总部科技项目(JB71-16-010) |
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| Stage generator model for backup protection setting calculation |
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LEI Qi1,2, WANG Xiaoyang3, LIU Yadong3, YU Ruiji4, SHI Dongyuan1,2, LI Yinhong1,2
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1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2.Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;3.State Key Laboratory of Power Grid Safety and Energy Conservation, China Electric Power Research Institute, Beijing 100192, China;4.State Grid Xuzhou Power Supply Company, Xuzhou 221000, China
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| Abstract: |
| The sub-transient generator model is commonly used in protection setting calculation to simplify calculation, but it does not consider that short circuit current decays along with time, and the backup protection has the feature of time delay. The accuracy of protection setting values will be reduced by using the sub-transient generator model in backup protection setting calculation. In order to improve the accuracy of backup protection setting calculation, a stage generator model is proposed. Based on the electrical characteristics of generator at the typical time of backup protection, the equivalent static generator model can be obtained and then the stage generator model suitable for backup protection setting calculation can be formed. Simulation based on IEEE 39-bus system verifies that the stage generator model can improve the accuracy of backup protection setting calculation. |
| Key words: relay protection backup protection protection setting calculation stage generator model short circuit current current assistance coefficient |
