| 引用本文: | 陈博,邱 建,曾耿晖,等.计及阻抗匹配平衡牵引变压器的电网短路计算方法[J].电力系统保护与控制,2016,44(13):33-39. |
| CHEN Bo,QIU Jian,ZENG Genghui,et al.Short-circuit calculation methods for the grid considering impedance-matching balance traction transformers[J].Power System Protection and Control,2016,44(13):33-39 |
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| 计及阻抗匹配平衡牵引变压器的电网短路计算方法 |
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陈博1,邱 建2,曾耿晖2,李一泉2,罗深增1,石东源1
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(1.强电磁工程与新技术国家重点实验室, 华中科技大学, 湖北 武汉430074;
2..广东电网公司电力调度控制中心, 广东 广州510620)
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| 摘要: |
| 深入分析了阻抗匹配平衡牵引变压器的接线形式，分别提出了基于对称分量法的计及阻抗匹配平衡牵引变压器的电网短路计算方法以及基于相分量法的短路计算方法。给出了各种类型的故障计算公式。并将两种方法相比较，结合算例验证了方法的正确性和实用性。与基于相分量法的短路计算方法相比，基于对称分量法的短路计算方法更容易与现有普遍应用的基于对称分量法的电力系统故障计算程序相结合，只需在程序中添加相应的短路计算模块即可对阻抗匹配平衡变压器短路故障进行计算。利用所提基于对称分量法的计算方法开发的软件包已用于实际工程。 |
| 关键词: 电气化铁路 阻抗匹配平衡牵引变压器 短路计算 对称分量 相分量 |
| DOI：10.7667/PSPC151281 |
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| Short-circuit calculation methods for the grid considering impedance-matching balance traction transformers |
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CHEN Bo1,QIU Jian2,ZENG Genghui2,LI Yiquan2,LUO Shenzeng1,SHI Dongyuan1
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(1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong
University of Science and Technology, Wuhan 430074, China; ;2. Dispatching and Control
Center of Guangdong Power Grid Corporation, Guangzhou 510620, China)
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| Abstract: |
| By analyzing in-depth the connection mode of the impedance-matching balance traction transformer, two practical methods respectively based on symmetrical component and phase component are proposed to calculate the short-circuit current of power grid when short occurs in the secondary side of the transformer. And the formulas for a variety of fault types are given. The comparison of two methods is also proposed. An example using actual grid is given to prove the accuracy and practicability of the two methods. The method based on symmetrical component can be adopted in nowadays calculation programs widely applying in power system based on symmetrical component more conveniently than the method based on phase component and the calculation programs can calculate the short current rapidly by adding special module using symmetrical component when short occurs in the secondary side of the transformer. A software package based on symmetrical component has been applied in the actual project. |
| Key words: electrified railways impedance-matching balance traction transformers short-circuit calculation symmetrical component method phase component |
