基于绝对延时的DCCT异地同步现场校准方法及不确定度研究
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摘要
直流电流互感器(DCCT)的准确性合格与否是其状态评估及现场投产验收的重要依据,对直流输电保护控制的稳定运行起着极其重要作用。因此本文分析了目前直流电流互感器现场应用情况,就现场校准方法存在的问题,提出一种基于绝对延时的DCCT异地同步现场校准方法,开展了DCCT绝对延时的测试方法研究,解决了一直以来开环异步、人工计算造成的准确度及效率低的问题。文章构建了高准确度直流互感器现场异地同步校准系统及不确定度分析模型,确保了可信度。所述方法在实验室中得到了验证,并开展了±500kV永富直流工程直流电流互感器现场校验工作,为我国换流站DCCT现场校准提供参考依据。
The accuracy of the DC current transformer( DCCT) is an important basis for its status assessment and on-site commissioning and acceptance,and plays an extremely important role in the stable operation of DC transmission protection control. Therefore,the principle and field application of DC current transformer are analyzed,and in view of the existing problems on the field calibration method,a new method of DCCT synchronous calibration in different places based on absolute delay is proposed in this paper,and the research on the test method of DCCT absolute delay is carried out,which the problem of accuracy and efficiency caused by open-loop asynchronous and manual calculation has been solved. In this paper,the synchronous calibration system and uncertainty analysis model of DC transformer with high accuracy are constructed,which ensures its reliability. The proposed test method is verified in the laboratory,and the on-site calibration work of the DC current transformer in the ± 500 kV YongFu DC project is carried out,which provides a reference for the DCCT calibration of the converter station in China.
The accuracy of the DC current transformer( DCCT) is an important basis for its status assessment and on-site commissioning and acceptance,and plays an extremely important role in the stable operation of DC transmission protection control. Therefore,the principle and field application of DC current transformer are analyzed,and in view of the existing problems on the field calibration method,a new method of DCCT synchronous calibration in different places based on absolute delay is proposed in this paper,and the research on the test method of DCCT absolute delay is carried out,which the problem of accuracy and efficiency caused by open-loop asynchronous and manual calculation has been solved. In this paper,the synchronous calibration system and uncertainty analysis model of DC transformer with high accuracy are constructed,which ensures its reliability. The proposed test method is verified in the laboratory,and the on-site calibration work of the DC current transformer in the ± 500 kV YongFu DC project is carried out,which provides a reference for the DCCT calibration of the converter station in China.
引文
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[10]李宾宾,李岩,朱静,等.GB/T 26216.1-2010高压直流输电系统直流电流测量装置第一部分:电子式直流电流测量装置[S].北京:中国标准出版社,2011.Li Binbin,Li Yan,Zhu Jing,et al.GB/T 26216.1-2010 DC current measuring device for HVDC transmission system Part 1:Electronic DCcurrent measuring device[S].Beijing:Standard Press of China,2011.
[11]叶德培,赵峰,施昌彦,等.JJF 1059.1-1999测量不确定度评定与表示[S].北京:中国标准出版社,2013.Ye Depei,Zhao Feng,Shi Changyan,et al.JJF 1059.1-1999 Evaluation and Expression of Uncertainty in Measurement[S].Beijing:Standard Press of China,2013.
[2]李俊,舒开旗,李开成.直流互感器的传变特性研究[J].电测与仪表,2015,52(16A):73-76.Li Jun,Shu Kaiqi,Li Kaicheng.Study of transmission characteristics for DC transformer[J].Electrical Measurement&Instrumentation,2015,52(16A):73-76.
[3]李俊,申莉,李开成.直流互感器建模方法与运行特性研究[J].电测与仪表,2015,52(16A):68-72.Li Jun,Shen Li,Li Kaicheng.Study on modeling and operating characteristics of DC transformer[J].Electrical Measurement&Instrumentation,2015,52(16A):68-72.
[4]赵有斌,赵华锋.直流输电用±500 kV电压传感器及电流传感器的研制[J].高压电器,2005,41(4):299-300,303.Zhao Youbin,Zhao Huafeng.Study on±500 kV voltage and current transducer for HVDC transmission[J].High Voltage Apparatus,2005,41(4):299-300,303.
[5]郑欣,汪司珂,庞博,等.直流电流互感器现场检测方法及应用[J].电测与仪表,2015,52(16A):119-123.Zheng Xin,Wang Sike,Pang Bo,et al.The method and application of DC current transformer test in field[J].Electrical Measurement&Instrumentation,2015,52(16A):119-123.
[6]李前,李鹤,周一飞,等.±800kV直流输电系统换流站直流电流互感器现场校准技术[J].高电压技术,2011,37(12):3053-3058.Li Qian,Li He,Zhou Yifei,et al.On-site Calibration technology of DCcurrent measurement device in converter station of±800kV UHVDCtransmission project[J].High Voltage Engineering,2011,37(12):3053-3058.
[7]张杰,胡媛媛,刘飞,等.高压直流互感器现场校验关键技术[J].高电压技术,2016,42(9):3003-3010.Zhang Jie,Hu Yuanyuan,Liu Fei,et al.Critical technology of on-site calibration system for DC electronic Instrument Transformer[J].High Voltage Engineering,2016,42(9):3003-3010.
[8]蔡东辉.直流大电流计量标准装置检定方法及不确定评定[D].武汉:华中科技大学,2012.Cai Donghui.The methods of verification&evaluation of metering standard device of heavy direct current[D].Wuhan:Huazhong university of Science and Technology,2012.
[9]尚秋峰,张静,董建彬.电子式电流互感器校准系统不确定度评定方法[J].电力系统自动化,2008,32(18):63-66.Shang Qiufeng,Zhang Jing,Dong Jianbin.Evaluation of measurement uncertainty for the calibration system of electronic current transformer[J].Automation of Electric Power System,2008,32(18):63-66.
[10]李宾宾,李岩,朱静,等.GB/T 26216.1-2010高压直流输电系统直流电流测量装置第一部分:电子式直流电流测量装置[S].北京:中国标准出版社,2011.Li Binbin,Li Yan,Zhu Jing,et al.GB/T 26216.1-2010 DC current measuring device for HVDC transmission system Part 1:Electronic DCcurrent measuring device[S].Beijing:Standard Press of China,2011.
[11]叶德培,赵峰,施昌彦,等.JJF 1059.1-1999测量不确定度评定与表示[S].北京:中国标准出版社,2013.Ye Depei,Zhao Feng,Shi Changyan,et al.JJF 1059.1-1999 Evaluation and Expression of Uncertainty in Measurement[S].Beijing:Standard Press of China,2013.