基于EPON自同步的差动保护采样同步方法
|
摘要
同步采样是实现基于以太网无源光网络(ethernet passive optical network,EPON)通信的差动保护的关键。提出了基于EPON自同步的差动保护采样同步方法,基于EPON网络固有的IEEE802.1 AS时钟同步机制,通过EPON网络载体实现时钟的远程传递,采用光网络单元(optical network unit,ONU)的IRIG-B码或秒脉冲时钟接口输出时钟信号给差动保护装置,实现差动保护间的采样同步。分析了IEEE802.1 AS同步误差机理,理论分析及测试表明,该同步方法可达到百纳秒级的同步精度,充分满足差动保护的同步精度要求;并且对现有EPON网络和继电保护装置无特殊要求,不增加设备的软硬件成本,具有良好的经济性、实用性。
Synchronous sampling is the key to realize differential protection based on the EPON. A sampling synchronization method for differential protection based on EPON self-synchronization is proposed in this paper. Based on the inherent IEEE802.1 AS clock synchronization mechanism of the EPON network,the remote transfer of clock is realized by using the EPON network carrier. And,the IRIG-B code or the PPS clock interface of the ONU is used to output clock signal to the differential protection devices in order to achieve sampling synchronization among the devices. IEEE802.1 AS synchronization error mechanism is analyzed,and theoretical analysis and testing show that the synchronization method can reach 100 nanoseconds synchronized precision which fully meets the synchronization accuracy requirement of differential protection. This method has no special requirements on the existing EPON network and relay protection device,which does not increase the cost of hardware and software,and has good economy and practicability.
Synchronous sampling is the key to realize differential protection based on the EPON. A sampling synchronization method for differential protection based on EPON self-synchronization is proposed in this paper. Based on the inherent IEEE802.1 AS clock synchronization mechanism of the EPON network,the remote transfer of clock is realized by using the EPON network carrier. And,the IRIG-B code or the PPS clock interface of the ONU is used to output clock signal to the differential protection devices in order to achieve sampling synchronization among the devices. IEEE802.1 AS synchronization error mechanism is analyzed,and theoretical analysis and testing show that the synchronization method can reach 100 nanoseconds synchronized precision which fully meets the synchronization accuracy requirement of differential protection. This method has no special requirements on the existing EPON network and relay protection device,which does not increase the cost of hardware and software,and has good economy and practicability.
引文
[1]李瑞生.适用主动配电网的差动保护方案研究[J].电力系统保护与控制,2015,43(12):104-109.LI Ruisheng.Differential protection scheme to apply to active distribution network[J].Power System Protection and Control,2015,43(12):104-109.
[2]王婷,刘渊,李凤婷,等.光伏T接高压配电网电流差动保护研究[J].电力系统保护与控制,2015,43(13):60-65.WANG Ting,LIU Yuan,LI Fengting,et al.Research on the current differential protection where PV access to the high voltage distribution network with T-type[J].Power System Protection and Control,2015,43(13):60-65.
[3]赵萍,裘愉涛,徐华,等.适用于多点T接的新型电流差动保护[J].电力系统保护与控制,2017,45(20):152-157.ZHAO Ping,QIU Yutao,XU Hua,et al.A new current differential relay scheme for multi“T”nodes transmission line[J].Power System Protection and Control,2017,45(20):152-157.
[4]李娟,高厚磊,武志刚,等.有源配电网差动保护自同步原理及误差分析[J].电力系统自动化,2016,40(9):78-85.LI Juan,GAO Houlei,WU Zhigang,et al.Data selfsynchronization method and error analysis of differential protection in active distribution network[J].Automation of Electric Power Systems,2016,40(9):78-85.
[5]徐光福,张春合,严伟,等,基于EPON通信的智能配电网馈线差动保护[J].电力系统自动化,2014,38(2):91-96.XU Guangfu,ZHANG Chunhe,YAN Wei,et al.Feeder differential protection based on EPON communication for smart distribution networks[J].Automation of Electric Power System,2014,38(2):91-96.
[6]高吉普,徐长宝,戴宇,等.智能变电站IEEE1588以太网交换机故障案例复现测试及分析[J].电力系统保护与控制,2014,42(14):146-150.GAO Jipu,XU Changbao,DAI Yu,et al.Fault case analysis of IEEE1588 switch application in smart substation[J].Power System Protection and Control,2014,42(14):146-150.
[7]刘巍,熊浩清,石光,等.IEEE1588时钟同步系统应用分析与现场测试[J].电力自动化设备,2012,32(2):127-131.LIU Wei,XIONG Haoqing,SHI Guang,et al.Application analysis and field test of IEEE 1588 clock synchronization system[J].Electric Power Automation Equipment,2012,32(2):127-131.
[8]黄鑫,王永福,张道农,等.智能变电站IEC61588时间同步系统与安全评估[J].电力系统自动化,2012,36(13):76-80.HUANG Xin,WANG Yongfu,ZHANG Daonong,et al.IEC 61588 time synchronization system and security evaluation for smart substations[J].Automation of Electric Power Systems,2012,36(13):76-80.
[9]许永军,金乃正,叶志锋,等.一种基于EPON的时钟同步协议在配网多端差动保护中的研究及应用[J].电力系统保护与控制,2014,42(6):39-44.XU Yongjun,JIN Naizheng,YE Zhifeng,et al.Research and application of EPON based clock synchronization protocol in the multi-terminal differential protection of distribution line[J].Power System Protection and Control,2014,42(6):39-44.
[10]格伦·克雷默.基于以太网的无源光网络[M].北京:北京邮电大学出版社,2007:16.
[11]IEEE.Timing and synchronization for time-sensitive applications in bridged local area networks:IEEE Std 802.1 AS[S].IEEE,2010.
[12]LUO Yuanqiu,SUI Meng.Demonstration of an IEEE 802.1 AS prototype system for optical and wireless integration[C]//Optical Fiber Communication Conference and Exposition,USA:2011.
[13]ITU-T.Gigabit-capable passive optical networks(G-PON):transmission convergence layer specification:G.984.3Recommendation Amendment 2[Z].ITU-T,2009.
[14]国家能源局.基于以太网方式的无源光网络(EPON)系统技术条件:DL/T 1574-2016[S].北京:中国电力出版社,2016.
[15]丁志彬,吴飞.EPON在CDMA基站业务承载中的应用[J].移动通信,2009(14):75-77.
[16]何松生,张宇.符合电力应用特点的EPON关键技术研究[J].光通信技术,2016(3):5-8.HE Songsheng,ZHANG Yu.Research on the key technologies of EPON in line with the characteristics of power[J].Optical Communication Technology,2016(3):5-8.
[17]唐海国,冷华,朱吉然,等.智能配电网EPON通信技术的应用分析[J].供用电,2015,32(9):74-78.TANG Haiguo,LENG Hua,ZHU Jiran,et al.Application analysis of EPON communication technology in smart distribution networks[J].Distribution&Utilization,2015,32(9):74-78.
[18]鲍兴川.配电通信网接入层EPON保护组网可靠性与性价比分析[J].电力系统自动化,2013,37(8):96-101.BAO Xingchuan.Reliability and cost performance ratio analysis on EPON protection networking of power distribution communication network access layer[J].Automation of Electric Power Systems,2013,37(8):96-101.
[2]王婷,刘渊,李凤婷,等.光伏T接高压配电网电流差动保护研究[J].电力系统保护与控制,2015,43(13):60-65.WANG Ting,LIU Yuan,LI Fengting,et al.Research on the current differential protection where PV access to the high voltage distribution network with T-type[J].Power System Protection and Control,2015,43(13):60-65.
[3]赵萍,裘愉涛,徐华,等.适用于多点T接的新型电流差动保护[J].电力系统保护与控制,2017,45(20):152-157.ZHAO Ping,QIU Yutao,XU Hua,et al.A new current differential relay scheme for multi“T”nodes transmission line[J].Power System Protection and Control,2017,45(20):152-157.
[4]李娟,高厚磊,武志刚,等.有源配电网差动保护自同步原理及误差分析[J].电力系统自动化,2016,40(9):78-85.LI Juan,GAO Houlei,WU Zhigang,et al.Data selfsynchronization method and error analysis of differential protection in active distribution network[J].Automation of Electric Power Systems,2016,40(9):78-85.
[5]徐光福,张春合,严伟,等,基于EPON通信的智能配电网馈线差动保护[J].电力系统自动化,2014,38(2):91-96.XU Guangfu,ZHANG Chunhe,YAN Wei,et al.Feeder differential protection based on EPON communication for smart distribution networks[J].Automation of Electric Power System,2014,38(2):91-96.
[6]高吉普,徐长宝,戴宇,等.智能变电站IEEE1588以太网交换机故障案例复现测试及分析[J].电力系统保护与控制,2014,42(14):146-150.GAO Jipu,XU Changbao,DAI Yu,et al.Fault case analysis of IEEE1588 switch application in smart substation[J].Power System Protection and Control,2014,42(14):146-150.
[7]刘巍,熊浩清,石光,等.IEEE1588时钟同步系统应用分析与现场测试[J].电力自动化设备,2012,32(2):127-131.LIU Wei,XIONG Haoqing,SHI Guang,et al.Application analysis and field test of IEEE 1588 clock synchronization system[J].Electric Power Automation Equipment,2012,32(2):127-131.
[8]黄鑫,王永福,张道农,等.智能变电站IEC61588时间同步系统与安全评估[J].电力系统自动化,2012,36(13):76-80.HUANG Xin,WANG Yongfu,ZHANG Daonong,et al.IEC 61588 time synchronization system and security evaluation for smart substations[J].Automation of Electric Power Systems,2012,36(13):76-80.
[9]许永军,金乃正,叶志锋,等.一种基于EPON的时钟同步协议在配网多端差动保护中的研究及应用[J].电力系统保护与控制,2014,42(6):39-44.XU Yongjun,JIN Naizheng,YE Zhifeng,et al.Research and application of EPON based clock synchronization protocol in the multi-terminal differential protection of distribution line[J].Power System Protection and Control,2014,42(6):39-44.
[10]格伦·克雷默.基于以太网的无源光网络[M].北京:北京邮电大学出版社,2007:16.
[11]IEEE.Timing and synchronization for time-sensitive applications in bridged local area networks:IEEE Std 802.1 AS[S].IEEE,2010.
[12]LUO Yuanqiu,SUI Meng.Demonstration of an IEEE 802.1 AS prototype system for optical and wireless integration[C]//Optical Fiber Communication Conference and Exposition,USA:2011.
[13]ITU-T.Gigabit-capable passive optical networks(G-PON):transmission convergence layer specification:G.984.3Recommendation Amendment 2[Z].ITU-T,2009.
[14]国家能源局.基于以太网方式的无源光网络(EPON)系统技术条件:DL/T 1574-2016[S].北京:中国电力出版社,2016.
[15]丁志彬,吴飞.EPON在CDMA基站业务承载中的应用[J].移动通信,2009(14):75-77.
[16]何松生,张宇.符合电力应用特点的EPON关键技术研究[J].光通信技术,2016(3):5-8.HE Songsheng,ZHANG Yu.Research on the key technologies of EPON in line with the characteristics of power[J].Optical Communication Technology,2016(3):5-8.
[17]唐海国,冷华,朱吉然,等.智能配电网EPON通信技术的应用分析[J].供用电,2015,32(9):74-78.TANG Haiguo,LENG Hua,ZHU Jiran,et al.Application analysis of EPON communication technology in smart distribution networks[J].Distribution&Utilization,2015,32(9):74-78.
[18]鲍兴川.配电通信网接入层EPON保护组网可靠性与性价比分析[J].电力系统自动化,2013,37(8):96-101.BAO Xingchuan.Reliability and cost performance ratio analysis on EPON protection networking of power distribution communication network access layer[J].Automation of Electric Power Systems,2013,37(8):96-101.