中国电力 ›› 2020, Vol. 53 ›› Issue (2): 69-75.doi: 10.11930/j.issn.1004-9649.201812034

• 电网 • 上一篇    下一篇

辅助互感器串联补偿技术在供电型电压互感器电压调整中的应用

李璿1,2, 刘鹍3, 刘西超1, 丁嘉靖1, 艾兵3, 史强3   

  1. 1. 中国电力科学研究院有限公司, 湖北 武汉 430074;
    2. 电网环境保护国家重点实验室, 湖北 武汉 430074;
    3. 国网四川省电力公司电力科学研究院, 四川 成都 610041
  • 收稿日期:2018-12-12 修回日期:2019-04-10 出版日期:2020-02-05 发布日期:2020-02-05
  • 通讯作者: 李璿(1984-),女,通信作者,高级工程师,从事互感器技术高压电气设备性能评估及检测方法研究,E-mail:lixuan@epri.sgcc.com.cn E-mail:lixuan@epri.sgcc.com.cn
  • 基金资助:
    国家电网公司科技项目(大容量供电一体化互感器技术研究,GYW17201700096)。

Application of Auxiliary Transformer Series Compensation Technology in Voltage Compensation of Power Voltage Transformer

LI Xuan1,2, LIU Kun3, LIU Xichao1, DING Jiajing1, AI Bing3, SHI Qiang3   

  1. 1. China Electric Power Research Institute, Wuhan 430074, China;
    2. State Key Laboratory of Power Grid Environmental Protection, Wuhan 430074, China;
    3. Electric Power Research Institute of State Grid Sichuan Electrical Power Company, Chengdu 610041, China
  • Received:2018-12-12 Revised:2019-04-10 Online:2020-02-05 Published:2020-02-05
  • Supported by:
    This work is supported by the Science and Technology Project of SGCC (Research on the Technology of Large Capacity Power Supply Integrated Voltage Transformer, No.GYW17201700096).

摘要: 针对供电型电压互感器供电电压随负荷而变化的实际情况,介绍了一种基于辅助互感器串联补偿技术的供电电压补偿方法。以一台额定一次电压为110√3 kV,额定容量为60 kV·A的单相供电型电压互感器为例,计算了其供电电压及供电容量随负荷容量及功率因数的变化率。依据变化率,设计了基于辅助互感器的供电电压自动补偿回路,可实现对供电电压±4.4 V、±8.8 V、±13.2 V、±17.6 V、±22.0 V、±26.4及±30.8 V的补偿量。分别对功率因数cos φ=1和cos φ=0.89(感性)2种情况的不同负荷容量下供电电压补偿效果进行验证,试验结果表明:增加了辅助互感器自动串联补偿回路后,供电型电压互感器的供电电压变化率由–1.80%~11.36%提高到了–3.000%~0.045%,完全满足标准对单相220 V供电电压质量的要求。采用辅助互感器的自动串联补偿技术,可以实现对供电型电压互感器供电电压的补偿,解决了由于农村负荷功率因数低,高峰负荷期供电电压偏低的问题,对提高用户电压质量提供了保障。

关键词: 供电型电压互感器, 辅助互感器, 补偿, 电压调整, 供电电压

Abstract: In view of the fact that the supply voltage of power voltage transformer varies with load, this paper introduces a method of supply voltage compensation based on series compensation technology of auxiliary transformer. Taking a single-phase power supply voltage transformer with rated primary voltage of 110 / 3 kV and rated capacity 60 kV·A as an example, this paper calculates the variation rate of power supply voltage and capacity with load capacity and power factor. According to the rate of change, an automatic compensation circuit of power supply voltage is designed based on auxiliary transformer, which can realize the compensation of power supply voltage (+4.4 V, +8.8 V, +13.2 V, +17.6 V, +22 V, +26.4 and +30.8 V). The power factor cosφ=1 and cosφ=0.89 (inductive) are used to verify the power supply voltage compensation effect under different load capacities. The experimental results show that the power supply voltage change rate of the power supply voltage transformer increases from -1.8% ~ + 11.36% to -3% ~ + 0.045% after adding the automatic series compensation circuit of the auxiliary transformer, and the requirements for the quality of single-phase 220 V power supply voltage can be satisfied. The automatic series compensation technology of auxiliary transformer can be used to compensate the supply voltage of power supply voltage transformer, which solves the problem of low power factor of rural load and low supply voltage in peak load period, and can provide a guarantee for improving the voltage quality of users.

Key words: power voltage transformer, auxiliary transformer, compensation, voltage regulation, supply voltage