CN202433480U - Fast fault location device of overhead lines based on time synchronization - Google Patents
Fast fault location device of overhead lines based on time synchronization Download PDFInfo
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- CN202433480U CN202433480U CN 201120549916 CN201120549916U CN202433480U CN 202433480 U CN202433480 U CN 202433480U CN 201120549916 CN201120549916 CN 201120549916 CN 201120549916 U CN201120549916 U CN 201120549916U CN 202433480 U CN202433480 U CN 202433480U
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Abstract
The utility model relates to a fast fault location device of overhead lines based on time synchronization and belongs to the technical field of smart grid distribution automation. The device comprises a master station and is characterized in that distributed data acquisition units are arranged on distribution overhead lines, and a wireless communication circuit is in a wireless connection with a communication system of the master station. A plurality of distributed data acquisition units are arranged on the distribution overhead lines, time synchronization technology is adopted to collect voltages of the distribution overhead lines and current signals of each branch, collected data with time labels are sent back to the master station for calculation, a branch with a fault is determined, and positional information of a fault interval and a fault condition of the line are displayed. According to the fast fault location device, the fault interval of a power supply line can be determined automatically, the positional information of the fault interval can be provided, especially the accuracy rate of single-phase ground fault detection is improved, a small current neutral grounding system of a substation can be replaced, the power outage range can be reduced, first-aid repair time of lines can be shortened, and service reliability of a power supply system is improved.
Description
Technical field
The utility model belongs to intelligent grid Distribution Automation Technology field, is the quick fault locator of a kind of pole line based on time synchronized specifically.
Background technology
China's power distribution network; Generally adopt isolated neutral or neutral by arc extinction coil grounding mode; Singlephase earth fault is one of modal fault in these electrical networks, and failure rate is the highest, finds fault rapidly and accurately, fixes a breakdown; Be beneficial to power grid security, reliable, economical operation, be beneficial to the realization of power distribution automation.Traditional distribution line failure location technology generally uses line-failure indicator to carry out localization of fault now, but this localization method can only be effective to phase fault, do not fit into singlephase earth fault.The intelligent fault detector that occurred in recent years can solve the part singlephase earth fault, but success ratio is low, often occurs reporting by mistake and failing to report, and result of use is undesirable.Therefore the singlephase earth fault location that can carry out distribution line fast and accurately is that the power distribution automation industry is never to reducing the power failure scope, shorten power off time, improving power supply reliability and become extremely important.
At present, the distribution line failure localization method mainly contains following several method:
1, utilize the difference of failure message before and after the trouble spot that outdoor fault detector detects to confirm the localization method of fault section.
2, measure at line scan pickup coil side point place to confirm that fault distance is the fault analysis method of purpose:
3, the signal injection method of back through realizing to system's injection letter bow tracking takes place in fault.
The signal injection method of method 3 has the low frequency signal injection method dual mode of power frequency component injection method and non-power frequency integral multiple.This dual mode all need be transformed primary equipment, and investment is big.Wherein (1) power frequency component injection method is when singlephase earth fault takes place, and the neutral point access resistance (resistance value is 100 to 150 ohm) at transformer through the size of detection line current in resistance property, carries out earthing wire-selecting.When earth fault was resistive ground connection, the current in resistance property of injection was smaller, directly influenced the accuracy of route selection.This method can not be used for localization of fault simultaneously.(2) the low frequency signal injection method of non-power frequency integral multiple is when singlephase earth fault takes place; Judge the fault phase earlier through circuit PT voltage; Then through circuit PT to fault on the contrary to injecting greater than power frequency and for being not equal to the low frequency signal of power frequency integral multiple, search earth fault line and trouble spot through the principle that tracks.This method since inject signal a little less than, and receive the influence of line mutual-ground capacitor, under the situation of high resistance ground, the signal attenuation of primary side is fast, directly influences the detection of signal.
The utility model content
According to above deficiency of the prior art; The purpose of the utility model is to provide can judge the fault section of supply line automatically, and provides the positional information of fault section, has particularly improved the accuracy rate that singlephase earth fault is judged; Can substitute the small current earthing wire-selecting system of transformer station; Can reduce the labour intensity of power failure scope, attenuating line walking, shorten the circuit repairing time, improve the quick fault locator of the pole line based on time synchronized of the power supply reliability of electric power system.
The utility model solves the technical scheme that its technical matters adopted: based on the quick fault locator of the pole line of time synchronized; Comprise main website; Main website is provided with communication system and processor; It is characterized in that: the distributed data acquisition unit is set on the power frame ceases to be busy; The distributed data acquisition unit comprises that at least the inductive coil, protection modulate circuit, data acquisition circuit, storer, microprocessor, wireless communication line, electric power management circuit and the time reference that are electrically connected produce circuit; The communication system wireless connections of wireless communication line and main website, described wireless connections are meant that oneself organizes wireless network or public wireless communication networks can carry out message exchange with main website, and the data that have time tag of any time distributed data acquisition unit can be called by main website.Inductive coil adopts air core coil, can be that current sensor also can be a voltage sensor.
Through being arranged on the some distributed data acquisitions unit on the power frame ceases to be busy; Adopt Time synchronization technique to gather the voltage of power frame ceases to be busy and the current signal of each branch; The data back main website that collection is had time tag carries out computing; Judge out of order branch, show the positional information of fault section and the malfunction of circuit.
Wherein preferred version is:
Described distributed data acquisition unit comprises distributed current data collecting unit and distributed Voltage data acquisition unit; Three of described distributed current data collecting units are that one group of A, B, C that is installed in the power frame ceases to be busy respectively goes up mutually; Adorn one group along pole line basic routing line to be detected or branched line interval 20-2000 meter ampere, gather current data; Described distributed voltage data collecting unit is installed on distribution line or the substation bus bar, gathers circuit line voltage and residual voltage data.The installation interval distance can be confirmed bearing accuracy, is convenient to search.
Described electric power management circuit is provided with accumulator.
Described electric power management circuit is provided with the high-pressure source removing circuit.From power frame ceases to be busy power taking source, reduce the device power supply cost.
Described electric power management circuit comprises solar panel and accumulator, and solar panel connects accumulator.From utilizing the solar panel generating, reduce the device power supply cost.
The utility model based on the beneficial effect that the pole line fast fault locating method of time synchronized is had is: through globality optimal design and processing, utilize this device to realize:
1, do not roll up on the basis of equipment cost, make engineering technical personnel can grasp use fast, accurately the failure judgement distance is repaired fast, improves power supply quality, reduces equipment cost;
2, provide a kind of simple and practical, measured easy, the new equipment of the localization of fault of power frame ceases to be busy accurately;
This device can be judged the fault section of supply line automatically; And provide the positional information of fault section; Particularly improved the accuracy rate that singlephase earth fault is judged; Can substitute the small current earthing wire-selecting system of transformer station, can reduce the power failure scope, shorten the circuit repairing time, improve the power supply reliability of electric power system.
Description of drawings
Fig. 1 is the electrical schematic diagram of the utility model;
Fig. 2 is the collection point scheme of installation of the distributed current data collecting unit of the utility model;
Fig. 3 is the functional-block diagram of the distributed data acquisition unit of the utility model;
Among the figure: 1, transformer station 2, distributed current data collecting unit 3, power frame ceases to be busy 4, trouble spot 5, fault phase.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done and to further describe:
Embodiment 1:
Like Fig. 1, shown in Figure 2, distributed voltage data collecting unit is installed in the distribution line outlet or the secondary side of each section bus-bar potential transformer of transformer station 1, gathers circuit line voltage and residual voltage data.2 three of distributed current data collecting units are one group and are installed in respectively on A, B, three power frame ceases to be busys 3 of C, adorn one group along pole line basic routing line to be detected or branched line interval 20-2000 meter ampere, gather current data.
As shown in Figure 3; The distributed data acquisition unit comprises that at least the inductive coil, protection modulate circuit, data acquisition circuit, storer, microprocessor, wireless communication line, electric power management circuit and the time reference that are electrically connected produce circuit; The communication system wireless connections of wireless communication line and main website; Wireless connections are meant that oneself organizes wireless network or public wireless communication networks can carry out message exchange with main website, and the data that have time tag of any time distributed data acquisition unit can be called by main website.Sensor links to each other with the signal protection modulate circuit, and the guard signal modulate circuit links to each other with microprocessor, and microprocessor and time reference produce circuit, data storage circuitry, communicating circuit, electric power management circuit and link to each other.
Inductive coil adopts air core coil, can be that current sensor also can be a voltage sensor, and the distributed Voltage collecting unit adopts voltage sensor, and distributed current data collecting unit adopts current sensor.
Electric power management circuit both can adopt storage battery power supply; Also can the high-pressure source removing circuit from power frame ceases to be busy power taking source, reduce the device power supply cost, can also be solar panel to be set make up with accumulator; From utilizing the solar panel generating, reduce the device power supply cost.
Pole line fast fault locating method based on time synchronized is:
Through being arranged on the some distributed data acquisitions unit on the power frame ceases to be busy; Adopt Time synchronization technique to gather the voltage of power frame ceases to be busy and the current signal of each branch; The data back main website that collection is had time tag carries out computing; Judge out of order branch, show the positional information of fault section and the malfunction of circuit, comprise following concrete steps:
Step 1: some distributed data acquisitions unit is set on the power frame ceases to be busy; The distributed data acquisition unit comprises that at least the inductive coil, protection modulate circuit, data acquisition circuit, storer, microprocessor, wireless communication line, electric power management circuit and the time reference that are electrically connected produce circuit; Collection has the data of current signal of voltage and each branch of the power frame ceases to be busy of time tag; Judge the pole line fault, the record trouble moment, and upload main website;
Step 2: after main website receives fault moment, through the distributed data acquisition unit storage failure fault data constantly of its communication system request power frame ceases to be busy;
Step 3: main website carries out computing according to the data of receiving that have time tag, judges the fault phase 5 of power frame ceases to be busy, the distributed data acquisition unit requests fault data of going up mutually to fault through its communication system then;
Step 4: after the fault data of fault phase was received by main website, failure judgement was interval, and failure message is reached each distributed data acquisition unit respectively down through communication system, indicated.
Wherein,
The time of time reference generation circuit and its error of universal time are less than 1ms.The time tag that guarantees data is accurate, is convenient to analyzing and processing.
The data sampling frequency of distributed data acquisition unit is 1kHz-2GHz, and the data of cycle index storage above time of 2s.Guarantee sampling precision, detail record correct data and fault data are guaranteed the accuracy of analyzing and processing.
The interval method of the failure judgement of step 4 is: after main website obtains fault moment; This fault data more than the cycle in fault moment front and back that collects is uploaded in distributed data acquisition unit through communication system request fault goes up mutually; Main website carries out computing through this fault data; Judge that which distributed data acquisition unit has collected fault current, thereby judge the information of distribution line failure segment.
Fault data is electric current stable state and Temporal Data.
When the voltage data collecting unit detects the residual voltage rising of circuit; Line failure is put 4 ground connection; The moment that the fault of noting the voltage data collecting unit takes place, and cross wireless network during with this and send main website to, main website is received to after the information; The distributed current data collecting unit of installing to this transformer station outlet sends the data-frozen order; The distributed current data collecting unit of transformer station outlet can pass through the radio relay communication mode, transmits the data-frozen order to each distributed current data collecting unit of data link below, until the final node of network.Each distributed current data collecting unit is carried out freeze command, freezes electric current stable state and the Temporal Data gathered before and after the fault moment.
Main website passes through wireless network to distributed Voltage data acquisition unit request fault data.In order to reduce data transmission period; The reaction velocity of raising system; Main website calculates the fault phase according to the line voltage distribution fault data that receives, then through the distributed current data collecting unit request fault data of wireless network on fault, after a request fault data that distributed current data collecting unit is gathered is received by main website; At first carry out first half-wave polarity computing of fault moment and comparison, confirm fault section according to first half-wave polarity.And then according to thus before and after the humorous wave amplitude of both sides, trouble spot distributed current data collecting units confirm, to improve the accuracy of fault distinguishing.After completion is differentiated by main website, provide the longitude and latitude of fault section, send local display command to individual distributed current data collecting unit again, be convenient to search fast and confirm the trouble spot.
When distributed current data collecting unit detects the fault definite value that the electric current of circuit surpass to set; The circuit failed because; Distributed current data collecting unit is noted the moment that fault takes place; And judge generation, and the distributed current data collecting unit at the line outlet place of transformer station will be carved through wireless network and send main website to, and main website is received to after the information; The distributed current data collecting unit of installing to this transformer station outlet sends the data-frozen order; The distributed current data collecting unit of transformer station outlet can pass through the radio relay communication mode, transmits the data-frozen order to each distributed current data collecting unit of data link below, until the final node of network.Each distributed current data collecting unit is carried out freeze command, freezes electric current stable state and the Temporal Data gathered before and after the fault moment.
Main website passes through wireless network to request Reflector data.Main website confirms fault section according to Reflector property after receiving a Reflector fault data that distributed current data collecting unit is gathered.After completion is differentiated by main website, provide the longitude and latitude of fault section, send local display command to individual distributed current data collecting unit again, be convenient to search fast and confirm the trouble spot.Main website, is saved to main website and is convenient to crash analysis to distributed current data collecting unit request fault data through wireless network then.
The mechanism of the main website of mentioning in the utility model and function can be passed through program setting, by professionals such as common computer and Electrical Engineer are grasped.
Claims (5)
1. quick fault locator of the pole line based on time synchronized; Comprise main website; Main website is provided with communication system and processor; It is characterized in that: the distributed data acquisition unit is set on the power frame ceases to be busy; The distributed data acquisition unit comprises that at least the inductive coil, protection modulate circuit, data acquisition circuit, storer, microprocessor, wireless communication line, electric power management circuit and the time reference that are electrically connected produce circuit, the communication system wireless connections of wireless communication line and main website.
2. the quick fault locator of the pole line based on time synchronized according to claim 1 is characterized in that: described distributed data acquisition unit comprises distributed current data collecting unit and distributed Voltage data acquisition unit,
Three of described distributed current data collecting units are that one group of A, B, C that is installed in the power frame ceases to be busy respectively goes up mutually, adorn one group along pole line basic routing line to be detected or branched line interval 20-2000 meter ampere, gather current data;
Described distributed voltage data collecting unit is installed on distribution line or the substation bus bar, gathers circuit line voltage and residual voltage data.
3. the quick fault locator of the pole line based on time synchronized according to claim 1, it is characterized in that: described electric power management circuit is provided with accumulator.
4. the quick fault locator of the pole line based on time synchronized according to claim 1, it is characterized in that: described electric power management circuit is provided with the high-pressure source removing circuit.
5. the quick fault locator of the pole line based on time synchronized according to claim 1, it is characterized in that: described electric power management circuit comprises solar panel and accumulator, solar panel connects accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120549916 CN202433480U (en) | 2011-12-23 | 2011-12-23 | Fast fault location device of overhead lines based on time synchronization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120549916 CN202433480U (en) | 2011-12-23 | 2011-12-23 | Fast fault location device of overhead lines based on time synchronization |
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| CN202433480U true CN202433480U (en) | 2012-09-12 |
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| CN 201120549916 Expired - Fee Related CN202433480U (en) | 2011-12-23 | 2011-12-23 | Fast fault location device of overhead lines based on time synchronization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297629A (en) * | 2014-08-19 | 2015-01-21 | 中国科学院电工研究所 | Method for detecting and positioning section faults of a power distribution network containing distributed generators |
| CN104914347A (en) * | 2015-05-20 | 2015-09-16 | 广西电网有限责任公司桂林供电局 | Grounding fault judgment method based on time axis comparison of Beidou satellite time service |
| GB2524055A (en) * | 2014-03-13 | 2015-09-16 | Cresatech Ltd | Improvements in or relating to power service monitoring |
-
2011
- 2011-12-23 CN CN 201120549916 patent/CN202433480U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2524055A (en) * | 2014-03-13 | 2015-09-16 | Cresatech Ltd | Improvements in or relating to power service monitoring |
| GB2524055B (en) * | 2014-03-13 | 2017-11-15 | Cresatech Ltd | Improvements in or relating to power service monitoring |
| CN104297629A (en) * | 2014-08-19 | 2015-01-21 | 中国科学院电工研究所 | Method for detecting and positioning section faults of a power distribution network containing distributed generators |
| CN104914347A (en) * | 2015-05-20 | 2015-09-16 | 广西电网有限责任公司桂林供电局 | Grounding fault judgment method based on time axis comparison of Beidou satellite time service |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZIBO POWER SUPPLY COMPANY OF SHANDONG ELECTRIC POW Free format text: FORMER OWNER: ZIBO WEITE ELECTRIC CO., LTD. Effective date: 20130802 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: ZIBO POWER SUPPLY COMPANY OF SHANDONG ELECTRIC POWER CORPORATION Effective date: 20130802 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 255000 ZIBO, SHANDONG PROVINCE TO: 100031 XICHENG, BEIJING |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 Xicheng District, Chang'an Avenue, No. 86, Patentee after: State Grid Corporation of China Patentee after: STATE GRID ZIBO POWER SUPPLY COMPANY OF SHANDONG PROVINCE Patentee after: Zibo Wit Electric Co.,Ltd. Address before: 100031 Xicheng District, Chang'an Avenue, No. 86, Patentee before: State Grid Corporation of China Patentee before: Zibo Power Supply Company of Shandong Electric Power Corp. Patentee before: Zibo Wit Electric Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130802 Address after: 100031 Xicheng District, Chang'an Avenue, No. 86, Patentee after: State Grid Corporation of China Patentee after: Zibo Power Supply Company of Shandong Electric Power Corp. Patentee after: Zibo Wit Electric Co.,Ltd. Address before: 255000 No. 61 West Village Road, Zhangdian District, Shandong, Zibo Patentee before: Zibo Power Supply Company of Shandong Electric Power Corp. Patentee before: Zibo Wit Electric Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20181223 |