Influence of Synchronous System on Measuring Device in Smart Substation and Its Processing Strategy

doi:10.11985/2020.03.019

Abstract

Abstract:

The network sampling method based on fiber-optic network transmission is widely applied in smart substation which arranges simply, and all data sharing in substation can be realized. However, it requires high accuracy of the station synchronization system signal. Compared to point-to-point sampling method, the reliability of the network sampling method cannot be ensured. By analyzing the network sampling data synchronization technology based on electrical reference vector, the influence of the clock synchronization system abnormity on the sampling, measurement calculation and synchronism function of the measuring device is analyzed. Aiming at the influence of sampling abnormities caused by synchronous system abnormities on the measuring device, the processing strategies of uniform synchronous adjustment, automatic frame loss compensation, quality-aided decision-making and abnormal interpolation alarm are proposed. These schemes are implemented to reduce the impact of synchronization system effects on measuring device effectively, and promote reliability of the network sampling and calculation in many projects and proven to be effective.

Key words: Network sampling, clock synchronization, uniform synchronous adjustment, automatic frame loss compensation, quality-aided decision-making, abnormal interpolation alarm

CLC Number:

TM561

ZHU Herong,FANG Jiawei,CHEN Guiyou,WANG Min,XIONG Muwen. Influence of Synchronous System on Measuring Device in Smart Substation and Its Processing Strategy[J]. Journal of Electrical Engineering, 2020, 15(3): 143-149.

Figures/Tables 8

References 11

[1]	赵家庆, 钱科军, 俞瑜, 等. 智能变电站采样值组网分布式同步技术及应用[J]. 电力自动化设备, 2014,34(9):154-158.
	ZHAO Jiaqing, QIAN Kejun, YU Yu, et al. Distributed synchronization technology of smart substation SV network and its application[J]. Electric Power Automation Equipment, 2014,34(9):154-158.
[2]	王璐. 智能变电站过程层组网分析与应用[J]. 电力系统保护与控制, 2012,40(2):141-144,150. doi: 10.7667/j.issn.1674-3415.2012.02.027
	WANG Lu. Analysis and application of the smart substation process level network[J]. Power System Protection and Control, 2012,40(2):141-144,150. doi: 10.7667/j.issn.1674-3415.2012.02.027
[3]	周华良, 郑玉平, 姜雷, 等. 适用于合并单元的等间隔采样控制与同步方法[J]. 电力系统自动化, 2014(23):96-99. doi: 10.7500/AEPS20140812007
	ZHOU Hualiang, ZHENG Yuping, JIANG Lei, et al. An equal-interval sampling control and synchronization method for merging unit[J]. Automation of Electric Power Systems, 2014(23):96-99. doi: 10.7500/AEPS20140812007
[4]	中国电力企业联合会, 全国电力系统管理及其信息交换标准化技术委员会. 变电站通用网络和系统第9-2部分：特定通信服务映射(SCSM)映射到ISO/IEC 8802-3的采样值：DL/T 860.92—2006 [S]. 北京: 中国电力出版社, 2006.
	China Electricity Council,National Technical Committee on Standardization of Power System Management and Information Exchange. Substation general networks and systems part 9-2：Specific communication service mapping (SCSM) to ISO/IEC 8802-3 sampling value：DL/T 860.92—2006[S]. Beijing: China Electric Power Press, 2006.
[5]	王立辉, 许扬, 陆于平, 等. 数字化变电站过程层采样值时间同步性分析及应用[J]. 电力自动化设备, 2010,30(8):37-40,44.
	WANG Lihui, XU Yang, LU Yuping, et al. Synchronized sampling of process layer in digital substation[J]. Electric Power Automation Equipment, 2010,30(8):37-40,44.
[6]	苏永春, 刘琦. 时间同步技术在智能变电站的应用[J]. 江西电力, 2010,34(4):6-8,20.
	SU Yongchun, LIU Qi. Time synchronization and its application in smart substation[J]. Jiangxi Electric Power, 2010,34(4):6-8,20.
[7]	赵志杰. 智能变电站时钟同步系统技术应用研究[J]. 云南电力技术, 2013,41(6):21-23,35.
	ZHAO Zhijie. Research on application of clock synch- ronization system of smart substation[J]. Yunnan Electric Power, 2013,41(6):21-23,35.
[8]	高红亮, 陶文伟, 刘东超, 等. 基于组网的智能变电站采样同步问题探讨[J]. 计算技术与自动化, 2017,36(4):54-59.
	GAO Hongliang, TAO Wenwei, LIU Dongchao, et al. Sampling synchronization strategy in smart substation based on network sampling[J]. Computing Technology and Automation, 2017,36(4):54-59.
[9]	雷雨田, 何银国, 徐志强, 等. 智能变电站网络时钟同步应用优化措施研究[J]. 无线通信, 2017,7(2):97-102.
	LEI Yutian, HE Yinguo, XU Zhiqiang, et al. Research on the optimization measures of intelligent substation network clock synchronization applications[J]. Hans Journal of Wireless Communications, 2017,7(2):97-102.
[10]	刘永欣, 易永辉, 陶永健, 等. 智能变电站过程层网络同步对时方案优化[J]. 电力系统自动化, 2015(10):112-116.
	LIU Yongxin, YI Yonghui, TAO Yongjian, et al. Synchronous optimization scheme of smart substation process level network[J]. Automation of Electric Power Systems, 2015(10):112-116.
[11]	李世群, 张金祥, 郭飞, 等. 智能变电站过程层网络同步对时优化研究[J]. 电力信息与通信技术, 2017,15(7):46-51.
	LI Shiqun, ZHANG Jinxiang, GUO Fei, et al. Study on synchronization optimization of process layer network in smart substation[J]. Electric Power Information and Communication Technology, 2017,15(7):46-51.

[1]	NAN Guoliang,ZHANG Lujiang,GUO Zhimin,HE Yang,LIU Meng,QIN Jiayi,JIANG Xin. Design of Trading Mode for Grid-side Energy Storage Participating in Peak-shaving Assistant Service Market [J]. Journal of Electrical Engineering, 2020, 15(3): 88-96.
[2]	LING Jian,ZHENG Huan,WAN Qijun,ZHAO Zhe,PENG Cheng. Key Issues and Improvement of High Power AC Current Source [J]. Journal of Electrical Engineering, 2020, 15(3): 78-87.
[3]	FENG Tingna,GU Shengjie,MA Jianqiao,TIAN Mingxing,CHENG Peng. Influence and Optimization of Burrs of Different Shaped Insulators Near Electric Fields [J]. Journal of Electrical Engineering, 2020, 15(3): 72-77.
[4]	YU Peizhou,YANG Gang,YANG Jihui,ZHANG Yuhua,XUE Hua,HUANG Ke. Speed Control Strategy of Permanent Magnet Synchronous Motor Based on Adaptive Backstepping [J]. Journal of Electrical Engineering, 2020, 15(3): 38-43.
[5]	HAN Dongxu,ZHAO Kai,LIU Xin,YOU Rui. Energy Management Strategy of Hybrid Energy Storage System Considering the State of Charge of the Supercapacitor [J]. Journal of Electrical Engineering, 2020, 15(3): 31-37.
[6]	JIN Qingren,GUO Min,YAO Zhiyang. Research on Control Strategy of Back-to-back VSC and Its Isolation Ability to Power Quality Problems [J]. Journal of Electrical Engineering, 2020, 15(3): 120-127.
[7]	YU Chunfeng, LI Weilin, WANG Yufeng. A Bidirectional DC Solid-state Circuit Breaker Based on Z-source [J]. Journal of Electrical Engineering, 2020, 15(2): 34-40.
[8]	BAO Yanyan,LIU Kang,WEN Dingjun,WANG Bixia,CHEN Honggang,MA Jianqiao. Effect of Test Interval Time on Effective Height of UHF Sensor [J]. Journal of Electrical Engineering, 2020, 15(1): 117-121.
[9]	SHI Yunjie,FENG Xiayun,WANG Fei,ZHANG Lijun,LI Yufei. Instability Mechanism and Control Measures of Reactive Compensation in Islanded Microgrid Based on Droop Control [J]. Journal of Electrical Engineering, 2020, 15(1): 29-35.
[10]	Min SONG,Pan WANG,Xiaodong GU. Study on Finite Element Analysis of Air Flow Characteristics in Catenary [J]. Journal of Electrical Engineering, 2019, 14(4): 51-59.
[11]	Hao PENG,Xiangyang XIA,Yin YANG,Ehui LIAO. Hybrid DC Circuit Breaker Based on Coupled Negative Pressure Circuit Research of Topological Analysis [J]. Journal of Electrical Engineering, 2019, 14(4): 46-50.
[12]	Bingfeng ZHANG,Tiejun WANG,Jianren PENG,Zhibin ZHANG,Keyue NIU. Research on Novel Harmonic Generator [J]. Journal of Electrical Engineering, 2019, 14(4): 18-25.
[13]	LIU Kang,WEN Dingjun,BAO Yanyan,WANG Bixia,CHEN Bodong,TIAN Mingxing. Effect of Fixed Angle and Outer Shielding Cover on Effective Height for UHF Sensor [J]. Journal of Electrical Engineering, 2019, 14(3): 61-66.
[14]	WANG Mingjie. Design and Research of a Device for Simulating Circuit Breaker Load [J]. Journal of Electrical Engineering, 2019, 14(2): 38-42.
[15]	YU Wenqian,TONG Xiangqian,YAN Cong,JIAO Pan. An Improved Grid Voltage Feedforward Strategy for LCL-type Grid-connected Inverters in Weak Grid [J]. Journal of Electrical Engineering, 2019, 14(2): 79-85.