基于改进电容模型的直流开关振荡回路参数计算方法
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摘要
特高压直流开关在特高压直流输电工程中是不可或缺的一次主设备,它的运行状况直接影响到直流输电系统的安全可靠运行,直流断路器在交流断路器的基础上还增加了振荡、吸能回路,使得它的结构更加复杂。直流开关中的振荡回路提供振荡电流来供开断,对其研究具有重要意义。为了实时准确地获取直流开关的运行状态和各项参数指标,提出了改进的直流开关振荡回路参数计算方法。该方法采用改进电容模型、高频采样,利用程序提取出电流的正负峰值点,采用最小二乘法,不断利用相邻2个正(负)峰值点数据求出振荡回路参数RLC值。以±1100 kV某换流站GRTS数据为例,通过与传统峰值点计算法比较,得出本文方法可将误差减小至3%以内,实验结果充分证明了计算方法的精确性与可行性。
UHV DC switch is an indispensable primary equipment in UHV DC transmission project. Its operating condition directly affects the safe and reliable operation of HVDC transmission system. DC circuit breaker also increases oscillation on the basis of AC circuit breaker. The energy absorption loop makes its structure more complicated. The oscillating circuit in the DC switch provides oscillating current for breaking, which is of great significance for its research. In order to accurately obtain the operating state and various parameter indexes of the DC switch in real time, an improved calculation method of DC switch oscillation circuit parameters is proposed. The method adopts the improved capacitance model and high-frequency sampling, and uses the program to extract the positive and negative peak points of the current. Using the least squares method, the adjacent two positive(negative) peak point data are continuously used to obtain the oscillation circuit parameter RLC value. Taking certain ± 1100 kV station GRTS data as an example,compared with the traditional peak point calculation method, it is concluded that the method can reduce the error to less than 3%. The experimental results fully prove the accuracy and feasibility of the calculation method.
UHV DC switch is an indispensable primary equipment in UHV DC transmission project. Its operating condition directly affects the safe and reliable operation of HVDC transmission system. DC circuit breaker also increases oscillation on the basis of AC circuit breaker. The energy absorption loop makes its structure more complicated. The oscillating circuit in the DC switch provides oscillating current for breaking, which is of great significance for its research. In order to accurately obtain the operating state and various parameter indexes of the DC switch in real time, an improved calculation method of DC switch oscillation circuit parameters is proposed. The method adopts the improved capacitance model and high-frequency sampling, and uses the program to extract the positive and negative peak points of the current. Using the least squares method, the adjacent two positive(negative) peak point data are continuously used to obtain the oscillation circuit parameter RLC value. Taking certain ± 1100 kV station GRTS data as an example,compared with the traditional peak point calculation method, it is concluded that the method can reduce the error to less than 3%. The experimental results fully prove the accuracy and feasibility of the calculation method.
引文
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[7]马元社.高压直流断路器振荡回路特性[J].南方电网技术,2011,5(3):10-13.MA Yuanshe.Characteristic of oscillation circuit in HVDC circuit breakers[J]. Southen Power System Technology,2011,5(3):10-13.
[8]彭海应,陈伟.基于遗传算法的高压直流断路器振荡回路参数计算[J].广东电力,2013,26(5):40-44.PENG Haiying, CHEN Wei. Calculation for high voltage direct current breaker vibration circuit parameters based on genetic algorithm[J]. Guangdong Electric Power,2013,26(5):40-44.
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[12]郑占锋,邹积岩,董恩源,等.直流开断与直流断路器[J].高压电器,2006,42(6):445-449.ZHENG Zhanfeng, ZOU Jiyan, DONG Enyuan, et al. DCinterruption and DC circuit breaker[J]. High Voltage Apparatus,2006,42(6):445-449.
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[14]李宾宾,苟锐锋,张万荣.±800 kV特高压直流输电系统用直流断路器研究[J].电力设备,2007,8(3):8-11.LI Binbin, GOU Ruifeng, ZHANG Wanrong. Study on DC circuit breaker for±800 kV UHVDC system[J]. Electrical Equipment,2007,8(3):8-11.
[15]李岩,罗雨,许树楷,等.柔性直流输电技术:应用、进步与期望[J].南方电网技术,2015,9(1):7-13.LI Yan,LUO Yu,XU Shukai,et al. VSC-HVDC transmission technology:application, advancement and expectation[J].Southern Power System Technology,2015,9(1):7-13.
[16]程铁汉,黄瑜珑,孙珂珂,等.高压直流转换开关和试验回路的研究[J].高压电器,2014,50(12):55-61.CHENG Tiehan, HUANG Yulong, SUN Keke, et al.Investigation on current commutation capability of high voltage direct current commutation switch[J].High Voltage Apparatus,2014,50(12):55-61.
[17]姚良忠,吴婧,王志冰,等.未来高压直流电网发展动态分析[J].中国电机工程学报,2014,34(34):6007-6020.YAO Liangzhong, WU Jing, WANG Zhibing, et al.Pattern analysis of future HVDC grid development[J].Proceeding of the CSEE,2014,34(34):6007-6020.
[18]管霖,陈肖灿,沈鹏,等.改善系统暂态稳定的VSCHVDC线性自抗扰控制器[J].广东电力,2018,31(10):1-9.GUAN Lin, CHEN Xiaocan, SHEN Peng, et al.VSCHVDC linear active disturbance rejection controller for improving system transient stability[J].Guangdong Electric Power,2018,31(10):1-9.
[19]张哲任,徐政,徐雨哲,等.高压直流输电基本测试系统[J].广东电力,2018,31(9):2-12.ZHANG Zheren, XU Zheng, XU Yuzhe, et al. Basic test system for HVDC transmission[J].Guangdong Electric Power,2018,31(9):2-12.
[20]许云旺,王丙辉,曾洋,等.多端柔性直流输电应用及仿真[J].电子设计工程,2018,26(10):176-179.XU Yunwang, WANG Binghui, ZENG Yang, et al.Application and simulation of multi-terminal flexible DC transmission[J]. Electronic Design Engineering, 2018, 26(10):176-179.
[21]贺春,吴东,孙广涛.特高压直流控制保护系统设计与开发[J].电子设计工程,2017,25(17):50-53,57.HE Chun, WU Dong, SUN Guangtao.Design and development of UHV DC control and protection system[J].Electron-ic Design Engineering,2017,25(17):50-53,57.
[22]张天,龚雁峰.特高压交直流电网输电技术及运行特性综述[J].智慧电力,2018,46(2):87-92.ZHANG Tian, GONG Yanfeng. Overview of transmission technology and operation characteristics of UHV AC/DC power grid[J]. Smart Power,2018,46(2):87-92.
[23]董飞飞,俞登科.我国电网技术的回顾与展望[J].智慧电力,2018,46(4):6-10.DONG Feifei, YU Dengke.Review and prospect of China's power grid technology[J].Smart Power,2018,46(4):6-10.
[24]瞿合柞,黄彦浩,李晓明,等.机电暂态仿真中直流输电系统恢复特性曲线修正方法[J].电力信息与通信技术,2018,16(6):43-51.QU Hezuo, HUANG Yanhao, LI Xiaoming, et al.A method for correcting the recovery characteristic curve of HVDC transmission system in electromechanical transient simulation[J].Electric Power Information and Communication Technology,2018,16(6):43-51.
[25]姜梦,熊浩清,邓晓璐,等.特高压直流系统异常运行下的功率特性研究[J].智慧电力,2018,46(5):58-64.JIANG Meng, XIONG Haoqing, DENG Xiaowei, et al.Study on power characteristics under abnormal operation of UHV DC system[J]. Smart Power,2018,46(5):58-64.
[2]马为民,聂定珍,曹燕明.特高压直流输电系统换流站的优化设计[J].高电压技术,2012,38(12):3109-3112.MA Weimin, NIE Dingzhen, CAO Yanming.Optimizing design of UHVDC converter stations[J].High Voltage Engineer, 2012,38(12):3109-3112.
[3]刘振亚.特高压直流输电技术研究成果专辑(2008年)[M].北京:中国电力出版社,2009:221-234.
[4]杨一鸣,张蕾.±800kV特高压直流输电工程换流站主设备规范[J].高电压技术,2012,38(12):3235-3239.YANG Yiming, ZHANG Lei.Specification of main equipment in converter stations for±800 kV UHDVC projects[J].High Voltage Engineering,2012,38(12):3235-3239.
[5]彭畅,温家良,马国华,等.特高压直流输电系统中直流转换开关的电流转换分析与仿真[J].中国电机工程学报,2011,31(36):1-7.PENG Chang, WEN Jialiang, MA Guohua, et al.Analysis and simulation on current commutation of the DC transfer switches in UHVDC transmission systems[J].Proceedings of the CSEE,2011,31(36):1-7.
[6]彭畅,温家良,马国华,等.特高压直流输电系统的直流转换开关研制[J].中国电机工程学报,2012, 32(16):151-156.PENG Chang, WEN Jialiang, MA Guohua, etal.Development of DC transfer switch for ultra high voltage DC transmission systems[J].Proceedings of the CSEE, 2012, 32(16):151-156.
[7]马元社.高压直流断路器振荡回路特性[J].南方电网技术,2011,5(3):10-13.MA Yuanshe.Characteristic of oscillation circuit in HVDC circuit breakers[J]. Southen Power System Technology,2011,5(3):10-13.
[8]彭海应,陈伟.基于遗传算法的高压直流断路器振荡回路参数计算[J].广东电力,2013,26(5):40-44.PENG Haiying, CHEN Wei. Calculation for high voltage direct current breaker vibration circuit parameters based on genetic algorithm[J]. Guangdong Electric Power,2013,26(5):40-44.
[9]赵畹君.高压直流输电技术[M].北京:中国电力出版社,2004.
[10]张万荣,苟锐锋,赵伯楠,等.直流断路器转移直流电流过程的仿真计算研究[J].高压电器,2002,38(2):1-4.ZHANG Wanrong, GOU Ruifeng, ZHAO Bainan, et al.Study on digital simulation of transfering direct current using DC breakers[J]. High Voltage Apparatus, 2002, 38(2):1-4.
[11] NOVELLO L, BALDO F, FERRO A, et al. Development and testing of a 10 kA hybrid mechanical-static DC circuit breaker[J]. IEEE Transactions on Applied Superconductivity, 2011,21(6):3621-3627.
[12]郑占锋,邹积岩,董恩源,等.直流开断与直流断路器[J].高压电器,2006,42(6):445-449.ZHENG Zhanfeng, ZOU Jiyan, DONG Enyuan, et al. DCinterruption and DC circuit breaker[J]. High Voltage Apparatus,2006,42(6):445-449.
[13] CALLAVIK M, BLOMBERG A, H FNER J, et al. The hybrid HVDC breaker:an innovation breakthrough enabling reliable HVDC grid[R].Zurich:ABB Grid Systems, Technical Paper,2012.
[14]李宾宾,苟锐锋,张万荣.±800 kV特高压直流输电系统用直流断路器研究[J].电力设备,2007,8(3):8-11.LI Binbin, GOU Ruifeng, ZHANG Wanrong. Study on DC circuit breaker for±800 kV UHVDC system[J]. Electrical Equipment,2007,8(3):8-11.
[15]李岩,罗雨,许树楷,等.柔性直流输电技术:应用、进步与期望[J].南方电网技术,2015,9(1):7-13.LI Yan,LUO Yu,XU Shukai,et al. VSC-HVDC transmission technology:application, advancement and expectation[J].Southern Power System Technology,2015,9(1):7-13.
[16]程铁汉,黄瑜珑,孙珂珂,等.高压直流转换开关和试验回路的研究[J].高压电器,2014,50(12):55-61.CHENG Tiehan, HUANG Yulong, SUN Keke, et al.Investigation on current commutation capability of high voltage direct current commutation switch[J].High Voltage Apparatus,2014,50(12):55-61.
[17]姚良忠,吴婧,王志冰,等.未来高压直流电网发展动态分析[J].中国电机工程学报,2014,34(34):6007-6020.YAO Liangzhong, WU Jing, WANG Zhibing, et al.Pattern analysis of future HVDC grid development[J].Proceeding of the CSEE,2014,34(34):6007-6020.
[18]管霖,陈肖灿,沈鹏,等.改善系统暂态稳定的VSCHVDC线性自抗扰控制器[J].广东电力,2018,31(10):1-9.GUAN Lin, CHEN Xiaocan, SHEN Peng, et al.VSCHVDC linear active disturbance rejection controller for improving system transient stability[J].Guangdong Electric Power,2018,31(10):1-9.
[19]张哲任,徐政,徐雨哲,等.高压直流输电基本测试系统[J].广东电力,2018,31(9):2-12.ZHANG Zheren, XU Zheng, XU Yuzhe, et al. Basic test system for HVDC transmission[J].Guangdong Electric Power,2018,31(9):2-12.
[20]许云旺,王丙辉,曾洋,等.多端柔性直流输电应用及仿真[J].电子设计工程,2018,26(10):176-179.XU Yunwang, WANG Binghui, ZENG Yang, et al.Application and simulation of multi-terminal flexible DC transmission[J]. Electronic Design Engineering, 2018, 26(10):176-179.
[21]贺春,吴东,孙广涛.特高压直流控制保护系统设计与开发[J].电子设计工程,2017,25(17):50-53,57.HE Chun, WU Dong, SUN Guangtao.Design and development of UHV DC control and protection system[J].Electron-ic Design Engineering,2017,25(17):50-53,57.
[22]张天,龚雁峰.特高压交直流电网输电技术及运行特性综述[J].智慧电力,2018,46(2):87-92.ZHANG Tian, GONG Yanfeng. Overview of transmission technology and operation characteristics of UHV AC/DC power grid[J]. Smart Power,2018,46(2):87-92.
[23]董飞飞,俞登科.我国电网技术的回顾与展望[J].智慧电力,2018,46(4):6-10.DONG Feifei, YU Dengke.Review and prospect of China's power grid technology[J].Smart Power,2018,46(4):6-10.
[24]瞿合柞,黄彦浩,李晓明,等.机电暂态仿真中直流输电系统恢复特性曲线修正方法[J].电力信息与通信技术,2018,16(6):43-51.QU Hezuo, HUANG Yanhao, LI Xiaoming, et al.A method for correcting the recovery characteristic curve of HVDC transmission system in electromechanical transient simulation[J].Electric Power Information and Communication Technology,2018,16(6):43-51.
[25]姜梦,熊浩清,邓晓璐,等.特高压直流系统异常运行下的功率特性研究[J].智慧电力,2018,46(5):58-64.JIANG Meng, XIONG Haoqing, DENG Xiaowei, et al.Study on power characteristics under abnormal operation of UHV DC system[J]. Smart Power,2018,46(5):58-64.