CN102628914A - Method for positioning grounding point of intelligent distribution line - Google Patents
Method for positioning grounding point of intelligent distribution line Download PDFInfo
- Publication number
- CN102628914A CN102628914A CN2012101095495A CN201210109549A CN102628914A CN 102628914 A CN102628914 A CN 102628914A CN 2012101095495 A CN2012101095495 A CN 2012101095495A CN 201210109549 A CN201210109549 A CN 201210109549A CN 102628914 A CN102628914 A CN 102628914A
- Authority
- CN
- China
- Prior art keywords
- distribution line
- zero
- sequence current
- line
- substation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Locating Faults (AREA)
Abstract
The invention discloses a method for positioning the grounding point of an intelligent distribution line. Each distribution line is partitioned into a plurality of segments; each segment of the distribution line is provided with a distribution column switch data terminal FTU (Feeder Terminal Unit); and a distribution system is provided with a transformation station data terminal RTU (Remote Terminal Unit) and an opening/closing ring main unit data terminal DTU. The initial end zero-sequence current of a failure line is larger than that of a non-failure line; the initial end zero-sequence current of the failure line flows to a bus; the initial end zero-sequence current of the non-failure line flows to a line; the values of zero-sequence current and zero-sequence power measured by using the FUTs on both sides of a single-phase grounding failure point are different; and the value measured by using the FTU of a column switch in the single-phase grounding failure point is larger than the value measured by using the FTU of the column switch outside the single-phase grounding failure point, so that the line grounding point can be accurately searched. The method for positioning the grounding point of the intelligent distribution line has the advantages of capability of rapidly and accurately positioning the grounding point of the distribution line, improvement on the power supply reliability and safety of the distribution line, and the like.
Description
Technical field
The present invention relates to a kind of earth point localization method of intelligent power distribution circuit.
Background technology
35kV, 10kV system are isolated neutral system in the electric system, as 35kV, come quick and precisely to find earth point in the method that at present not have to get well when the 10kV feeder line breaks down.Feeder line is that feeder line is made up of many distribution lines by the power circuit of Bulk Supply Substation in the distribution system to the secondary substation power supply, and every distribution line is divided into multistage, and the line construction of feeder line is as shown in Figure 3.At present; When searching the earth point of feeder line; Be lean on the work about electric power personnel piecemeal line walking search earth point; This just needs the human and material resources and the time of labor, therefore serious reduction power supply reliability, and since other two phase voltage that single-phase earthing causes rise and bring serious threat to power grid security.
Summary of the invention
The present invention is the weak point that exists in the above-mentioned prior art for avoiding, and a kind of earth point localization method of intelligent power distribution circuit is provided, with search efficiency and accuracy, raising power supply reliability and the security that improves the feeder line earth point.
The present invention adopts following technical scheme for the technical solution problem.
The earth point localization method of intelligent power distribution circuit is characterized in, with being divided into multistage on every distribution line, all is provided with a distribution pillar switch data terminal FTU who is used to detect the zero-sequence current of this section distribution line on the distribution pillar of each section distribution line; Distribution system also is provided with substation data terminal RTU, opens and closes ring main unit data terminal DTU in one's power; The step of earth point localization method is following:
A. gathered the zero-sequence current data at each bar distribution line top and every section distribution line top thereof by the substation, terminal FTU sends zero-sequence current to substation by the distribution pillar switch data; Simultaneously the substation is gathered each substation data terminal RTU, is is respectively opened and closed the zero-sequence current data that ring main unit data terminal DTU is in one's power detected;
B. the substation is analyzed the zero-sequence current data, if the zero-sequence current of T bar distribution line is maximum, and the homopolar power of T bar distribution line flows to bus by distribution line, judges that then earth point is positioned on the T bar distribution line;
C. the zero-sequence current at each section distribution line top on the T bar distribution line is analyzed in the substation; If the zero-sequence current of n section distribution line greater than the zero-sequence current of the zero-sequence current of n+1 section distribution line and n+1 section distribution line greater than preset value; Simultaneously the homopolar power of n section distribution line greater than preset value, judges then that earth point is positioned at the n section distribution line on the T bar distribution line greater than the homopolar power of the homopolar power of n+1 section distribution line and n+1 section distribution line;
D. the substation sends to main website with earth point information, and the earth point information that the staff obtains according to main website is confirmed the position of earth point.
Compared with present technology, beneficial effect of the present invention is embodied in:
When singlephase earth fault takes place, the data terminal RTU of all feeder lines, FTU or DTU will gather and the zero-sequence current data of computing are delivered to the substation through branch's communication network on the bus.Carry out comprehensive analysis and judgement by the substation according to zero-sequence current and homopolar power, can quick and precisely find earth point.The substation is sent to main website with the result of comprehensive analysis and judgement, by the operations staff result of comprehensive analysis and judgement is informed the maintainer, and the maintainer can quick and precisely find earth point according to the result.
The earth point localization method of intelligent power distribution circuit of the present invention has advantages such as the power supply reliability that can locate, can improve distribution line to the earth point of distribution line rapidly and accurately and security.
Description of drawings
Fig. 1 is the process flow diagram of the earth point localization method of intelligent power distribution circuit of the present invention.
Fig. 2 is the power distribution automation communication network architecture figure of the earth point localization method of intelligent power distribution circuit of the present invention.
Fig. 3 is the line assumption diagram of the feeder line of distribution system.
Below pass through embodiment, and combine accompanying drawing that the present invention is described further.
Embodiment
Referring to Fig. 1, the earth point localization method of intelligent power distribution circuit with being divided into multistage on every distribution line, all is provided with a distribution pillar switch data terminal FTU who is used to detect the zero-sequence current of this section distribution line on the distribution pillar of each section distribution line; Distribution system also is provided with substation data terminal RTU, opens and closes ring main unit data terminal DTU in one's power; The step of earth point localization method is following:
A. gathered the zero-sequence current data at each bar distribution line top and every section distribution line top thereof by the substation, terminal FTU sends zero-sequence current to substation by the distribution pillar switch data; Simultaneously the substation is gathered each substation data terminal RTU, is is respectively opened and closed the zero-sequence current data that ring main unit data terminal DTU is in one's power detected;
B. the substation is analyzed the zero-sequence current data, if the zero-sequence current of T bar distribution line is maximum, and the homopolar power of T bar distribution line flows to bus by distribution line, judges that then earth point is positioned on the T bar distribution line;
C. the zero-sequence current at each section distribution line top on the T bar distribution line is analyzed in the substation; If the zero-sequence current of n section distribution line greater than the zero-sequence current of the zero-sequence current of n+1 section distribution line and n+1 section distribution line greater than preset value; Simultaneously the homopolar power of n section distribution line greater than preset value, judges then that earth point is positioned at the n section distribution line on the T bar distribution line greater than the homopolar power of the homopolar power of n+1 section distribution line and n+1 section distribution line;
D. the substation sends to main website with earth point information, and the earth point information that the staff obtains according to main website is confirmed the position of earth point.
Fault characteristic during singlephase earth fault: faulty line top zero-sequence current is greater than non-fault line top zero-sequence current; Faulty line top zero-sequence current flows to bus; Non-fault line top zero-sequence current flows to circuit; Be that homopolar power flows on the contrary; The zero-sequence current that singlephase earth fault point both sides FTU measures and homopolar power numerical value are different, and the FTU of the post switch in the singlephase earth fault point measures numerical value and measures numerical value greater than the FTU of singlephase earth fault point post switch outward, can accurately find the line-to-ground point in view of the above.
When singlephase earth fault takes place, the data terminal RTU of all feeder lines, FTU or DTU will gather and the data of computing are delivered to the substation through branch's communication network on the bus, and be as shown in Figure 2.Carry out comprehensive analysis and judgement by the substation, can quick and precisely find earth point.The substation is sent to main website with the result of comprehensive analysis and judgement, by the operations staff result of comprehensive analysis and judgement is informed the maintainer, and the maintainer can quick and precisely find earth point according to the result.
Like Fig. 3, distribution line is divided into many, and every distribution line is divided into the 1st to n+k section, and on this n+k section distribution line, each section distribution line correspondence is provided with a distribution pillar switch data terminal FTU.Distribution system also is provided with substation data terminal RTU, opens and closes ring main unit data terminal DTU in one's power.
Like Fig. 2, distribution pillar switch data terminal FTU is connected with the substation of distribution system through branch's communication network, sends detected zero-sequence current to substation.RTU also is connected with the substation of distribution system through communication network with DTU, sends detected zero-sequence current to substation.The substation includes communication line and computing machine, and special software is installed on the computing machine, through the zero-sequence current data of each FTU of software processes, RTU and DTU transmission.Handle zero-sequence current the substation, through the contrast of zero-sequence current, homopolar power and preset value, judges whether this bar or this section distribution line break down.
Claims (1)
1. the earth point localization method of intelligent power distribution circuit is characterized in that, with being divided into multistage on every distribution line, all is provided with a distribution pillar switch data terminal FTU who is used to detect the zero-sequence current of this section distribution line on the distribution pillar of each section distribution line; Distribution system also is provided with substation data terminal RTU, opens and closes ring main unit data terminal DTU in one's power; The step of earth point localization method is following:
A. gathered the zero-sequence current data at each bar distribution line top and every section distribution line top thereof by the substation, terminal FTU sends zero-sequence current to substation by the distribution pillar switch data; Simultaneously the substation is gathered each substation data terminal RTU, is is respectively opened and closed the zero-sequence current data that ring main unit data terminal DTU is in one's power detected;
B. the substation is analyzed the zero-sequence current data, if the zero-sequence current of T bar distribution line is maximum, and the homopolar power of T bar distribution line flows to bus by distribution line, judges that then earth point is positioned on the T bar distribution line;
C. the zero-sequence current at each section distribution line top on the T bar distribution line is analyzed in the substation; If the zero-sequence current of n section distribution line greater than the zero-sequence current of the zero-sequence current of n+1 section distribution line and n+1 section distribution line greater than preset value; Simultaneously the homopolar power of n section distribution line greater than preset value, judges then that earth point is positioned at the n section distribution line on the T bar distribution line greater than the homopolar power of the homopolar power of n+1 section distribution line and n+1 section distribution line;
D. the substation sends to main website with earth point information, and the earth point information that the staff obtains according to main website is confirmed the position of earth point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101095495A CN102628914A (en) | 2012-04-16 | 2012-04-16 | Method for positioning grounding point of intelligent distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101095495A CN102628914A (en) | 2012-04-16 | 2012-04-16 | Method for positioning grounding point of intelligent distribution line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102628914A true CN102628914A (en) | 2012-08-08 |
Family
ID=46587207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101095495A Pending CN102628914A (en) | 2012-04-16 | 2012-04-16 | Method for positioning grounding point of intelligent distribution line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102628914A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001325A (en) * | 2012-09-29 | 2013-03-27 | 北京康力昆泰电力技术有限公司 | Intelligent network distribution system based on Beidou satellite communication system |
| CN103267930A (en) * | 2013-05-20 | 2013-08-28 | 国家电网公司 | Method for checking small current neutral grounding |
| CN103529357A (en) * | 2013-08-02 | 2014-01-22 | 吉林省电力有限公司长春供电公司 | Method for determining section of single-phase ground fault of 10kV power distribution system |
| CN103728532A (en) * | 2013-12-26 | 2014-04-16 | 长园深瑞继保自动化有限公司 | Power distribution network single-phase grounding fault judging and locating method |
| CN103760463A (en) * | 2014-01-20 | 2014-04-30 | 国家电网公司 | Low-current line selection method based on DTU |
| CN103941157A (en) * | 2014-04-16 | 2014-07-23 | 江苏汉天星配电自动化科技有限公司 | Grounding circuit and section locating method of small current grounding system |
| CN104808113A (en) * | 2015-04-30 | 2015-07-29 | 国网黑龙江省电力有限公司鹤岗供电公司 | Intelligent distribution line fault point location method |
| CN105445619A (en) * | 2015-11-25 | 2016-03-30 | 国网辽宁省电力有限公司阜新供电公司 | Power distribution circuit fault point positioning method |
| CN106646126A (en) * | 2016-12-09 | 2017-05-10 | 国网北京市电力公司 | Method, device and system for locating fault |
| CN107907792A (en) * | 2017-11-03 | 2018-04-13 | 国网江苏省电力公司新沂市供电公司 | Neutral by arc extinction coil grounding ring distribution system single-phase grounding selecting method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017974A (en) * | 2007-03-06 | 2007-08-15 | 耿玉泉 | Single phase grounding failure positioning method and device of neutral point non direct grounding power grid |
| CN202435021U (en) * | 2011-10-24 | 2012-09-12 | 赫兹曼电力（广东）有限公司 | Automatic fault isolation system for distribution network feed line |
-
2012
- 2012-04-16 CN CN2012101095495A patent/CN102628914A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017974A (en) * | 2007-03-06 | 2007-08-15 | 耿玉泉 | Single phase grounding failure positioning method and device of neutral point non direct grounding power grid |
| CN202435021U (en) * | 2011-10-24 | 2012-09-12 | 赫兹曼电力（广东）有限公司 | Automatic fault isolation system for distribution network feed line |
Non-Patent Citations (2)
| Title |
|---|
| 张海台等: "配电线路故障快速隔离技术", 《2010配电自动化新技术及其应用高峰论坛》 * |
| 李天阳: "配电网馈线自动化主站系统关键技术研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001325A (en) * | 2012-09-29 | 2013-03-27 | 北京康力昆泰电力技术有限公司 | Intelligent network distribution system based on Beidou satellite communication system |
| CN103267930A (en) * | 2013-05-20 | 2013-08-28 | 国家电网公司 | Method for checking small current neutral grounding |
| CN103267930B (en) * | 2013-05-20 | 2016-01-06 | 国家电网公司 | A kind of method checking small current neutral grounding |
| CN103529357A (en) * | 2013-08-02 | 2014-01-22 | 吉林省电力有限公司长春供电公司 | Method for determining section of single-phase ground fault of 10kV power distribution system |
| CN103728532A (en) * | 2013-12-26 | 2014-04-16 | 长园深瑞继保自动化有限公司 | Power distribution network single-phase grounding fault judging and locating method |
| CN103728532B (en) * | 2013-12-26 | 2016-05-25 | 长园深瑞继保自动化有限公司 | One-phase earthing failure in electric distribution network judgement and localization method |
| CN103760463A (en) * | 2014-01-20 | 2014-04-30 | 国家电网公司 | Low-current line selection method based on DTU |
| CN103941157A (en) * | 2014-04-16 | 2014-07-23 | 江苏汉天星配电自动化科技有限公司 | Grounding circuit and section locating method of small current grounding system |
| CN104808113A (en) * | 2015-04-30 | 2015-07-29 | 国网黑龙江省电力有限公司鹤岗供电公司 | Intelligent distribution line fault point location method |
| CN105445619A (en) * | 2015-11-25 | 2016-03-30 | 国网辽宁省电力有限公司阜新供电公司 | Power distribution circuit fault point positioning method |
| CN106646126A (en) * | 2016-12-09 | 2017-05-10 | 国网北京市电力公司 | Method, device and system for locating fault |
| CN107907792A (en) * | 2017-11-03 | 2018-04-13 | 国网江苏省电力公司新沂市供电公司 | Neutral by arc extinction coil grounding ring distribution system single-phase grounding selecting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102628914A (en) | Method for positioning grounding point of intelligent distribution line | |
| CN102624097A (en) | Fault point positioning method for intelligent distribution lines | |
| CN205665347U (en) | 10kV distribution lines broken string fault detection and positioning system based on three phase voltage electric current | |
| CN103336220B (en) | The method and apparatus of distribution network failure being monitored and locating | |
| CN102064537B (en) | Method for judging and processing single-phase earth faults by using electronic mutual inductor | |
| CN103607042B (en) | The distribution network failure processing method of long fault indicator for overhead lines towards outskirts of a town | |
| CN102937675A (en) | Real-time data collecting and fault positioning system of power distribution network and working method thereof | |
| CN106353640A (en) | Fault location method, device and system for distribution lines | |
| CN106646130B (en) | A kind of active distribution network Fault Locating Method compared based on current polarity and system | |
| CN103018630A (en) | Single-phase earth fault transient line selection method of distribution network | |
| CN103983885A (en) | Low-voltage circuit fault locating terminal and method used for power distribution substation region | |
| CN201893540U (en) | Intelligent radio network dispatching digital-type boundary controller complete equipment | |
| CN205333777U (en) | Phase to earth fault positioner | |
| CN105759179A (en) | Zero-sequence-transient-analysis-based fault positioning system and method for low current grounding system | |
| CN202870234U (en) | Online fault monitoring system for 10KV circuit | |
| CN106205304A (en) | A kind of true value power distribution network pilot system | |
| CN205670180U (en) | Based on zero sequence transient analysis low current neutral grounding system fault alignment system | |
| CN103675606B (en) | Bridge-type DC Line Fault monitoring alarm | |
| CN204154848U (en) | A kind of Secondary Circuit of Potential Transformer multipoint earth faults on-Line Monitor Device | |
| CN104808113A (en) | Intelligent distribution line fault point location method | |
| CN203465374U (en) | Device for monitoring and positioning power distribution network faults | |
| CN202978426U (en) | Fault detection terminal based on power distribution automation | |
| CN203811747U (en) | A small current grounding line selection system | |
| CN108847656B (en) | Distribution network grounding line selection protection system based on self-adaptive dynamic contribution rate | |
| CN104931859A (en) | Fault monitoring device based on distributed wave recording |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121218 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121218 Address after: 230022 No. 133, Susong Road, Hefei, Anhui Applicant after: Anhui Power Company Hefei Power Supply Company Applicant after: State Grid Corporation of China Address before: 230022 power supply company, No. 133, Susong Road, Anhui, Hefei Applicant before: Anhui Power Company Hefei Power Supply Company |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120808 |