CN103412238A - Self-adaptive small current grounding line selection method - Google Patents

Self-adaptive small current grounding line selection method Download PDF

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CN103412238A
CN103412238A CN 201310268724 CN201310268724A CN103412238A CN 103412238 A CN103412238 A CN 103412238A CN 201310268724 CN201310268724 CN 201310268724 CN 201310268724 A CN201310268724 A CN 201310268724A CN 103412238 A CN103412238 A CN 103412238A
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line
grounding
possibility
defined
according
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CN 201310268724
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Chinese (zh)
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陈祖勋
尹凯
陈宏辉
朱子坤
贺臣
杨冬梅
张火良
周俊涛
夏敏
笃峻
葛立青
金岩磊
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广东电网公司茂名供电局
南京南瑞继保电气有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management
    • Y04S10/522Fault detection or location

Abstract

The invention provides a self-adaptive small current grounding line selection method which comprises the following steps: (1) a line grounding fault occurrence condition is defined; (2) a line grounding possibility formula is defined; (3) when a situation where the line grounding fault occurrence condition defined in the step (1) is met is monitored, a pre-positioned system collects required line fault information calculated by the line grounding possibility formula, and stores the line fault information in a transformer substation monitoring system database in accordance with a formula operator sequence; (4) the operator in the transformer substation monitoring system database is read, and according to the line grounding possibility formula definition, the grounding possibility is calculated; (5) lines which are subjected to the grounding fault are sorted according to a diminishing possibility sequence; and (6) according to the sorting result, a line trial tripping is carried out to judge a grounding fault line. The grounding line selection method of the invention can automatically adapt to protection and control devices of different communication protocols and different types, select the fault line is a convenient and rapid manner, and use the trial tripping to assist the fault handling.

Description

一种自适应小电流接地选线方法 An adaptive method for small current grounding line

技术领域 FIELD

[0001] 本发明涉及变电站系统监控领域,具体而言涉及一种自适应小电流接地选线方法。 [0001] The present invention relates to the field of substation monitoring system, particularly relates to an adaptive method for small current grounding line.

背景技术 Background technique

[0002] 目前,我国IlOkV以下电网普遍采用采用不接地与经消弧线圈接地这2种非有效接地方式。 [0002] At present, the commonly used grid using the following IlOkV not grounded to the ground large_capacity of these two non-effectively grounded manner. 采用这种运行方式,在发生单相接地故障后,故障特征不明显,故障电流很小,故称为小电流接地故障。 In this operating mode, after the single-phase ground fault occurs, not obvious fault, the fault current is very small, it is known as ground fault current is small. 由于小电流接地故障三相之间的线电压基本保持不变,因此可允许电网在单相接地的情况下继续运行一段时间,不影响负荷供电。 Since the line voltage between the small-phase earth fault current remains substantially constant, thus the grid may be allowed to continue running in the case of single-phase ground period of time, it does not affect the load power supply. 但需要注意的是故障后非故障相电压要升高V 3倍,长期带故障运行会破坏绝缘,引发更为严重的相间故障。 But it should be noted that after the failure of non-fault phase voltage V 3 times to rise, with long-term trouble-free operation will damage the insulation, causing a more serious phase fault. 因此,当发生了小电流接地故障后应尽快选出故障线路,以便运行人员及时采取措施加以处理。 Therefore, when a small current ground fault has occurred shall be elected as soon as the fault line, so that operating personnel to take timely measures to deal with.

[0003] 在变电站监控系统中,进行小电流接地选线无需独立的采集装置并铺设二次电缆。 [0003] In the substation monitoring system, a small current grounding line without a separate collection device and the laying of the second cable. 但传统的变电站监控系统小电流接地选线算法往往依赖于本公司特定型号的保护或测控装置上送的故障信息。 However, the traditional substation monitoring system small current grounding line algorithm often depend on the fault information on the company or a particular type of protection and monitoring device sent. 然而同一变电站内保护或者测控装置有可能来源于不同制造商或者相同制造商的不同型号。 However, within the same substation protection and monitoring device, or it may come from different manufacturers or different models of the same manufacturer. 这种情况下变电站监控系统往往无法进行有效的小电流接地选线。 Substation monitoring system often can not effectively small current grounding line in this case.

发明内容 SUMMARY

[0004] 针对现有技术的缺陷和不足,本发明旨在提供一种自适应小电流接地选线方法,通过定义线路接地故障发生条件和可能性公式,自动适应不同通讯规约及不同类型的保护或测控装置,方便、迅速地选出接地故障线路。 [0004] for the shortcomings and deficiencies of the prior art, the present invention aims to provide an adaptive method for small current grounding line, and the conditions defined by the likelihood of the occurrence of a ground fault Formula line, automatically adapt to different communication protocol and different types of protection or monitoring and control device, easily and quickly select a ground fault line.

[0005] 为达成上述目的,本发明所采用的技术方案如下: [0005] To achieve the above object, the technical solution employed in the present invention is as follows:

[0006] 一种自适应小电流接地选线方法,包括以下步骤: [0006] A small current grounding line adaptive method, comprising the steps of:

[0007] ( I)线路接地故障发生条件定义; [0007] (I) defined line ground fault condition;

[0008] (2)线路接地可能性公式定义; [0008] The possibility of ground defined by the equation (2) line;

[0009] (3)根据装置类型获得步骤(I)中线路接地故障发生条件定义,当监测到满足线路接地故障发生条件时,根据装置ID获得步骤(2)中线路接地可能性公式算子列表,通过前置系统收集线路接地可能性公式计算所需要的线路故障信息,并按照公式算子先后顺序储存于变电站监控系统数据库; [0009] (3) (I) in line ground fault condition is defined according to the type of device obtaining step, when detecting a ground fault circuit conditions satisfied, the step of obtaining the device according to ID (2) the possibility of a ground line equation operator list , the possibility of a ground fault line information calculated as required by the pre-collection line system, and the operator sequence according to the formula stored in the database substation monitoring system;

[0010] (4)根据装置ID获得步骤(2)中线路接地可能性公式定义,读取步骤(3)中变电站监控系统数据库中的算子,将算子代入线路接地可能性公式进行接地可能性计算; [0010] (4) According to the device ID obtained in step (2) the possibility of a ground line defined formula, read in step (3) Operators of substations in the database monitoring system, the operator into progeny line may be grounded to ground the possibility of formula calculation;

[0011] (5)根据可能性由大到小对可能发生接地故障的线路进行排序; [0011] (5) descending to ground fault line may be ordered according to likelihood;

[0012] (6)根据排序结果对线路进行试跳,并根据试跳结果判断接地故障线路。 [0012] (6) modifying the lines according to a ranking result jump, and determine a ground fault circuit according jump results.

[0013] 进一步,前述步骤(I)中,根据不同的保护装置或测控装置而定义不同的接地故障发生条件,接地故障发生条件定义为遥信动作、遥信返回、一定时间内遥测值大于设定值、以及一定时间内遥测值小于设定值中的一种或者几种,当存在多种条件时,各种条件之间通过与、或、非逻辑运算输出定义结果,线路接地故障发生条件按照装置类型建立索引并储存于变电站监控系统数据库中。 [0013] Further, the step (I), a defined different ground fault defined conditions, ground fault condition is remote communication operation, remote return depending on the protective device and monitoring device, within a predetermined time telemetry value is greater than set value, and the value is less than a certain time telemetry one or several set values, when multiple conditions, the conditions occur through, or, not the logic operation result output is defined, between the line ground fault conditions indexing means according to the type of substation monitoring system and stored in the database.

[0014] 进一步,前述步骤(2)中,根据不同的保护装置或测控装置而定义不同的接地可能性公式,在定义时,首先定义算子是来源于保护装置或测控装置的对应遥信或遥测,然后定义算子之间通过数学运算符号连接,线路接地可能性公式按照装置ID建立索引储存于变电站监控系统数据库。 [0014] Further, the step (2), whereas the possibility of defining different formulas depending on the grounding protection device and monitoring device, when defining first defined operator is protected from the corresponding remote signaling device and monitoring device or telemetry, is defined between the operator and connected by a mathematical symbol, the likelihood of a ground line equation indexed database stored in the substation monitoring system according to the apparatus ID.

[0015] 进一步,前述步骤(6)中,根据排序结果对线路进行试跳,试跳命令发出后,如果在一定时间内所有线路接地故障消除则提示选线成功;如果超过一定时间线路接地故障仍存在,则选线失败,自动对线路进行重合闸,进行下一条线路的试跳。 [0015] Further, the step (6), according to the ranking result lines for jump, the jump command is issued, if all line ground fault is eliminated within a predetermined time prompting line selection is successful; if more than a certain time line ground fault still exists, the line selection fails, automatic reclosing of the line, a line for the next jump.

[0016] 由以上本发明的技术方案可知,本发明提供的自适应小电流接地选线方法,通过定义不同的线路接地故障发生条件及线路接地可能性公式,可以自动适应不同通讯规约及不同类型的保护或测控装置,方便、迅速的选出故障线路,通过试跳协助运行人员进行故障的处理。 [0016] apparent from the above technical solutions of the present invention, the adaptive small current grounding line method provided by the invention, by defining the different line ground line ground fault conditions and the possibility of the formula, can automatically adapt to different communication protocol and different types of protection or monitoring and control devices, easily and quickly select the fault line, running through the jump assisting personnel for processing failure.

附图说明 BRIEF DESCRIPTION

[0017] 图1为本发明较优实施例的接地选线实施方法的流程示意图。 [0017] Fig 1 a schematic flowchart of an embodiment of a ground line selection method Jiaoyou embodiment of the present invention.

[0018] 图2为图1实施例中线路接地故障发生条件定义流程示意图。 [0018] FIG. 2 is a schematic flow conditions are defined ground fault circuit embodiment of FIG. 1 embodiment.

[0019] 图3为图1实施例中线路接地可能性公式定义流程示意图。 [0019] FIG. 3 is a schematic view of one embodiment of the process defined in formula possibility ground line.

[0020] 图4为图1实施例中线路试跳流程示意图。 [0020] FIG. 4 is a circuit example schematic diagram of a flow jump embodiment.

具体实施方式 detailed description

[0021] 为了更了解本发明的技术内容,特举具体实施例并配合所附图式说明如下。 [0021] In order to better understand the technical content of the present invention, several specific embodiments with the accompanying drawings and described below.

[0022] 如图1所示,根据本发明的较优实施例,自适应小电流接地选线方法包括以下步骤:(I)线路接地故障发生条件定义;(2)线路接地可能性公式定义;(3)根据装置类型获得步骤(I)中接地故障发生条件定义,当监测到满足线路接地故障发生条件时,根据装置ID获得步骤(2)中接地可能性公式算子列表,通过前置系统收集线路接地可能性公式计算所需要的线路故障信息,并按照公式算子先后顺序储存于变电站监控系统数据库;(4)根据装置ID获得步骤(2)中接地可能性公式定义,读取步骤(3)中变电站监控系统数据库中的算子,将算子代入线路接地可能性公式进行接地可能性计算;(5)根据可能性由大到小对可能发生接地故障的线路进行排序;(6)根据排序结果对线路进行试跳,并根据试跳结果判断接地故障线路。 [0022] As shown, the of the preferred embodiment of the present invention, a small current grounding line adaptive method comprises the steps of 1: defined conditions (I) line ground fault; the possibility of a ground (2) line defined by the equation; condition is defined (3) (I) according to the type of device in a ground fault occurs obtaining step, when detecting a ground fault circuit satisfying conditions, a step (2) the possibility of grounding the formula operator list based on device ID, through the front-end system the possibility collection line ground fault line information calculated as required, and the operator sequence according to the formula stored in the database substation monitoring system; (4) defined in (2) the possibility of grounding apparatus according to the formula ID obtaining step, the reading step ( 3) the substation monitoring system database and operator, the operator into progeny ground line ground possibility likelihood calculation formula; (5) descending to earth fault line may be ordered based on the likelihood; (6) modifying the lines according to a ranking result jump, and determine a ground fault circuit according jump results.

[0023] 参考图2所示,在前述步骤(I)中,根据不同的保护装置或测控装置而定义不同的接地故障发生条件,接地故障发生条件定义为遥信动作、遥信返回、一定时间内遥测值大于设定值、以及一定时间内遥测值小于设定值中的一种或者几种,当存在多种条件时,各种条件之间通过与、或、非逻辑运算输出定义结果,接地故障发生条件按照装置类型建立索引并储存于变电站监控系统数据库。 [0023] Referring to Figure 2, in the step (I), the predetermined time defined different ground fault conditions define conditions of a ground fault operation of remote communication, remote return, depending on the protective device and monitoring device the telemetry greater than the set value, and the value is less than a certain time telemetry one or several set values, when multiple conditions, among the various conditions by, or non-defined output logic operation result, ground fault conditions according to the type of device and indexing substation monitoring system stored in the database.

[0024] 参考图3所示,在前述步骤(2 )中,根据不同的保护装置或测控装置而定义不同的接地可能性公式,在定义时,首先定义算子是来源于保护装置或测控装置的对应遥信或遥测,然后定义算子之间通过数学运算符号连接,接地可能性公式按照装置ID储存于变电站监控系统数据库。 [0024] Referring to Figure 3, in the step (2), whereas the possibility of defining different formulas depending on the grounding protection device and monitoring device, when defining first defined operator is derived from the protective device and monitoring device or a corresponding telemetry or remote communication, is defined between the operator and connected by a mathematical operation symbol, the possibility of grounding apparatus according to the formula substation monitoring system ID stored in the database.

[0025] 参考图4所示,在前述步骤(6)中,根据排序结果对线路进行试跳,试跳命令发出后,如果在一定时间内所有线路接地故障消除则提示选线成功;如果超过一定时间线路接地故障仍存在,则选线失败,自动对线路进行重合闸,进行下一条线路的试跳。 [0025] Referring to FIG, in the step (6), according to the ranking of the results for line 4 jump, the jump command is issued, if a ground fault elimination of all lines in a given time line selection prompting successful; if it exceeds certain time line ground fault still exists, the line selection fails, automatic reclosing of the line, a line for the next jump.

[0026] 综上所述,本发明的自适应小电流接地选线方法通过定义不同的线路接地故障发生条件及线路接地可能性公式,利用变电站内现有的保护或测控装置和站控层网络无需独立的采集装置并铺设二次电缆,可以自动适应不同通讯规约及不同类型的保护或测控装置,方便、迅速的选出故障线路,通过试跳协助运行人员进行故障的处理。 [0026] In summary, the adaptive small current grounding wire of the present invention by a method of defining different line ground line ground fault conditions and the possibility of formula, using existing substation protection and monitoring device or the station level and the network without a separate secondary collection device and the laying of cable that can automatically adapt to different communication protocols and different types of protection or monitoring and control devices, easily and quickly select the fault line, is processed by the failure of attempts to jump assist operating personnel.

[0027] 虽然本发明已以较佳实施例揭露如上,然其并非用以限定本发明。 [0027] While the present invention has been disclosed above by the preferred embodiments, they are not intended to limit the present invention. 本发明所属技术领域中具有通常知识者,在不脱离本发明的精神和范围内,当可作各种的更动与润饰。 Technical Field The present invention pertains having ordinary knowledge in the present invention without departing from the spirit and scope, may make various modifications and variations. 因此,本发明的保护范围当视权利要求书所界定者为准。 Accordingly, the scope of the present invention when the book following claims and their equivalents.

Claims (4)

  1. 1.一种自适应小电流接地选线方法,其特征在于,包括以下步骤: (1)线路接地故障发生条件定义; (2)线路接地可能性公式定义; (3)根据装置类型获得步骤(I)中线路接地故障发生条件定义,当监测到满足线路接地故障发生条件时,根据装置ID获得步骤(2)中线路接地可能性公式算子列表,通过前置系统收集线路接地可能性公式计算所需要的线路故障信息,并按照公式算子先后顺序储存于变电站监控系统数据库; (4)根据装置ID获得步骤(2)中线路接地可能性公式定义,读取步骤(3)中变电站监控系统数据库中的算子,将算子代入线路接地可能性公式进行接地可能性计算; (5)根据可能性由大到小对可能发生接地故障的线路进行排序; (6)根据排序结果对线路进行试跳,并根据试跳结果判断接地故障线路。 1. An adaptive method for small current grounding line, characterized by comprising the steps of: (1) line ground fault condition is defined; formula defines the possibility of ground (2) line; (3) a step of obtaining device type ( I) defined in line ground fault condition occurs when the monitored line ground fault conditions satisfied, the step of obtaining the device according to ID (2) the possibility of a ground line operator equation list, the system is calculated by the pre-collection line grounding possibility formula line fault information required, and the operator sequence according to the formula stored in the database substation monitoring system; (4) obtained in step (2) the possibility of a ground line is defined according to the formula device ID, the monitoring system reading step (3) in the substation database operator, the operator into progeny ground line ground possibility likelihood calculation formula; (5) descending to earth fault line may be ordered based on the likelihood; (6) according to the ranking result of line jump, and determine a ground fault circuit according jump results.
  2. 2.根据权利要求1所述的方法,其特征在于,前述步骤(I)中,根据不同的保护装置或测控装置而定义不同的接地故障发生条件,接地故障发生条件定义为遥信动作、遥信返回、一定时间内遥测值大于设定值、以及一定时间内遥测值小于设定值中的一种或者几种,当存在多种条件时,各种条件之间通过与、或、非逻辑运算输出定义结果,线路接地故障发生条件按照装置类型建立索引并储存于变电站监控系统数据库中。 2. The method according to claim 1, wherein the step (I), the defined conditions different ground fault, a ground fault condition is defined as an operation depending on the remote communication device or a protection monitoring and control devices, remote letter return telemetry certain period of time greater than the set value, and one or several telemetric value is smaller than the set value within a certain time, when multiple conditions, through, or, between the non-logical conditions operation result output is defined, the line ground fault conditions according to the type of device and indexing substation monitoring system stored in the database.
  3. 3.根据权利要求2所述的方法,其特征在于,前述步骤(2)中,根据不同的保护装置或测控装置而定义不同的接地可能性公式,在定义时,首先定义算子是来源于保护装置或测控装置的对应遥信或遥测,然后定义算子之间通过数学运算符号连接,线路接地可能性公式按照装置ID建立索引储存于变电站监控系统数据库。 3. The method according to claim 2, wherein the step (2), whereas the possibility of defining different formulas depending on the grounding protection device and monitoring device, when defining first defined operator derived from corresponding to telemetry or remote communication and monitoring device or the protective device, and is defined between the operator via mathematical symbol, the possibility of grounding the line equation indexed database stored in the substation monitoring system according to the apparatus ID.
  4. 4.根据权利要求3所述的方法,其特征在于,前述步骤(6)中,根据排序结果对线路进行试跳,试跳命令发出后,如果在一定时间内所有线路接地故障消除则提示选线成功;如果超过一定时间线路接地故障仍存在,则选线失败,自动对线路进行重合闸,进行下一条线路的试跳。 4. The method according to claim 3, wherein the step (6), modifying the lines jump according to a ranking result, the jump command is issued, if a ground fault elimination of all lines within a selected time prompting successful line; if more than a certain time line ground fault still exists, the line selection fails, automatic reclosing of the line, a line for the next jump.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104483595A (en) * 2014-12-12 2015-04-01 国家电网公司 Transmission line malfunction online analytic method of self-adaptive power system
CN106602527A (en) * 2016-12-05 2017-04-26 山东科汇电力自动化股份有限公司 Line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060291113A1 (en) * 2005-05-17 2006-12-28 Abb Oy System and method for determining location of phase-to-earth fault
CN101159376A (en) * 2007-09-26 2008-04-09 东北大学 Low current neutral grounding malfunction detection and positioning device and method
CN101777757A (en) * 2009-01-12 2010-07-14 杭州德力西集团有限公司 Small current grounding route selection method
CN101846715A (en) * 2009-03-27 2010-09-29 北海银河科技继保电气有限公司 Low-current ground fault line selection device and multi-platform combined line selection method
CN102110978A (en) * 2011-01-20 2011-06-29 单立辉 Method and device for high-accuracy low-current intelligent grounding wire selection
CN202351371U (en) * 2011-11-21 2012-07-25 广西星宇智能电气有限公司 Small current neutral grounding route selection device of self-adaptation zero sequence current fault features

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060291113A1 (en) * 2005-05-17 2006-12-28 Abb Oy System and method for determining location of phase-to-earth fault
CN101159376A (en) * 2007-09-26 2008-04-09 东北大学 Low current neutral grounding malfunction detection and positioning device and method
CN101777757A (en) * 2009-01-12 2010-07-14 杭州德力西集团有限公司 Small current grounding route selection method
CN101846715A (en) * 2009-03-27 2010-09-29 北海银河科技继保电气有限公司 Low-current ground fault line selection device and multi-platform combined line selection method
CN102110978A (en) * 2011-01-20 2011-06-29 单立辉 Method and device for high-accuracy low-current intelligent grounding wire selection
CN202351371U (en) * 2011-11-21 2012-07-25 广西星宇智能电气有限公司 Small current neutral grounding route selection device of self-adaptation zero sequence current fault features

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
王玉梅等: "基于SFB和相关分析法的小电流接地故障选线方法", 《电力自动化设备》, vol. 31, no. 2, 28 February 2011 (2011-02-28), pages 48 - 51 *
石晶: "基于GIS的10KV配电网故障定位方法及其应用研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 6, 15 December 2007 (2007-12-15), pages 042 - 206 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104483595A (en) * 2014-12-12 2015-04-01 国家电网公司 Transmission line malfunction online analytic method of self-adaptive power system
CN106602527A (en) * 2016-12-05 2017-04-26 山东科汇电力自动化股份有限公司 Line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method
CN106602527B (en) * 2016-12-05 2018-09-18 山东科汇电力自动化股份有限公司 Small current earth fault processing method and apparatus LINE anti-theft protection of hops with

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