CN201269915Y - Travelling wave positioning apparatus for electricity grid failure - Google Patents
Travelling wave positioning apparatus for electricity grid failure Download PDFInfo
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- CN201269915Y CN201269915Y CNU2008200538048U CN200820053804U CN201269915Y CN 201269915 Y CN201269915 Y CN 201269915Y CN U2008200538048 U CNU2008200538048 U CN U2008200538048U CN 200820053804 U CN200820053804 U CN 200820053804U CN 201269915 Y CN201269915 Y CN 201269915Y
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Abstract
The utility model relates to a fault traveling wave location device for a power grid, which comprises an open specialized traveling wave sensor (1), a traveling wave head check board (2), a GPS clock board (3), a recording board (4) for traveling wave time, a central processing unit (CPU) board (5) and a location computer (6). The open specialized traveling wave sensor (1) detects the transient signal of the power grid; the traveling wave head check board (2) judges the transient traveling wave signal of the power grid; the GPS clock board (3) generates a GPS synchronous clock with high precision; the recording board (4) for traveling wave time records the arrival time of the traveling wave signal; the CPU board (5) processes the time data; the location computer (6) calculates the accurate position of the fault point by utilizing the time data of various transformer substations. The fault traveling wave location device for the power grid collects the transient signal of the power grid from a casing earth wire (8) of a transformer (7), detects the fault traveling wave signal of the circuits at the high-voltage side, the medium-voltage side and the low-voltage side of the transformer of the transformer substation and has wide applicability. The location device is characterized by high precision and simple structure and is stable and reliable.
Description
Technical field
The utility model belongs to grid fault diagnosis technology field, particularly a kind of electric network functional failure travelling wave locating device.
Background technology
The key of transmission line travelling wave location is to seek the accurate moment that row wave-wave head arrives.Existing capable ripple locating device extracts travelling wave signal from the Current Transformer Secondary side mostly, by high speed acquisition, software detection failure judgement travelling wave signal, the capable ripple of record trouble time of arrival, needs to measure the transient current of every outlet, locating device complexity, cost height.For this reason, study traveling wave sensor both at home and abroad and extracted the correlation technique that the electrical network transient state travelling wave carries out localization of fault.Application number 02228319.6 " failure point of power transmission line locating device " by name application discloses the little reactance of a kind of utilization on transformer station's capacity cell and has extracted the device that travelling wave signal carries out localization of fault, this device extracts travelling wave signal by specialized equipment, eliminated the influence of power frequency component to positioning result, but this method need change the wiring of primary system, be unfavorable for the safe operation of electric system, be difficult to obtain at home promote.Application number 200320124005.2 " based on the power transmission network fault locator of the row ripple time difference " by name application disclose a kind of on the capacitive apparatus ground wire socket core-theaded type traveling wave sensor or in voltage transformer (VT) open delta side and connect the device that the partial pressure type traveling wave sensor obtains the electrical network jump signal, this device bearing accuracy height, good reliability; But the traveling wave sensor of this device can only detect the fault traveling wave signal of same electric pressure circuit, and installs complicated.
The utility model content
The purpose of this utility model is the problem at above-mentioned existence, and a kind of transient state travelling wave signal that extracts from the transformer case ground wire is provided, and writes down the row ripple electric network functional failure travelling wave locating device of time of arrival.It is sensitive, simple in structure to fault reflection, time keeping is accurate, reliable, and the special-purpose traveling wave sensor of this open type can be realized the transient signal detection to all outlets of transformer high, medium and low voltage.
For achieving the above object, the utility model comprises:
The special-purpose traveling wave sensor of open type is socketed on the transformer case ground wire, is used to extract the transient state travelling wave signal;
Row wave-wave head check-out console, be used to carry out the detection of transient state travelling wave signal, the signal that the special-purpose traveling wave sensor of open type extracts is through low frequency signals such as high-pass filtering filtering power frequencies, measure then, the variation steepness and the size of comparator input signal, what satisfy condition is the transient state travelling wave signal, again row wave-wave head signal is become the square-wave signal with certain amplitude, certain width;
The gps clock plate, online correction GPS clock signal second is used for providing standard GPS pps pulse per second signal to row ripple time keeping plate;
Row ripple time keeping plate, the time of arrival of combined standard GPS pps pulse per second signal and the capable wave-wave head of high precision crystal oscillator signal record, record row ripple channel number and polarity of traveling wave signal and packing simultaneously forms row ripple information and stores;
CPU (central processing unit) plate, the capable ripple information that the reads capable ripple time keeping plate record professional etiquette of going forward side by side is changed approximately and is formed capable wave datum, and will go wave datum and deliver to position computer;
Position computer carries out localization of fault according to the row wave datum and calculates.
The special-purpose traveling wave sensor of described open type is made up of two semi-circular high-frequency magnetic materials of symmetry, is advisable with double-deck coiling 5～30 circle coils of every part, and general coiling 10 circle coils, two semi-circular high-frequency magnetic material iron cores are by bolt together.
Electric network functional failure travelling wave locating device in the utility model adopts unique transient state travelling wave method for extracting signal, uses an open type traveling wave sensor just can realize the detection of all outlet transient state travelling wave signals of transformer high, medium and low voltage; And utilize hardware directly to write down capable ripple time of arrival, simplified greatly and judged having or not and write down the capable ripple design of hardware and software of time of arrival, avoided A/D sampling error and software analysis error of row ripple; In conjunction with gps clock check and correction high precision constant temperature crystal oscillator, output high-precision GPS synchronizing clock signals makes the time error of capable ripple time keeping be no more than 100ns, has improved the accuracy of capable ripple record time of arrival greatly.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is a structural drawing of the present utility model;
Fig. 2 is the structural drawing of the special-purpose traveling wave sensor of open type;
(a) be cell winding coiling figure;
(b) be the sensor shape assumption diagram.
Embodiment
After test line broke down, the fault traveling wave that fault produces was propagated at road direction circuit along the line two ends from the trouble spot, arrives circuit two ends transformer station respectively.The detection of fault traveling wave signal as shown in Figure 1, the earthing of casing line (8) of the special-purpose traveling wave sensor of open type (1) transformer (7) from transformer station extracts the transient state travelling wave signal, there is not direct electrical communication with primary system, the output signal amplitude of the special-purpose traveling wave sensor of open type (1)+2V～+ 12V between, send into capable wave-wave head check-out console (2).Row wave-wave head check-out console (2) carries out jump signal to input signal and detects, and goes the identification of wave-wave head by rate of change, rise or fall time and the wave head amplitude of row ripple.When the amplitude of rate of change, rise or fall time and the wave head of transient state travelling wave signal meets the demands, row wave-wave head check-out console will be gone wave-wave head signal by hardware circuit and be become the square-wave signal with certain amplitude, certain width, and deliver to capable ripple time keeping plate (4) after isolating by high speed optoelectronic.The gps signal that gps clock plate (3) receives the GPS receiver is handled and is produced the high precision standard pps pulse per second signal: when gps signal receives just often, directly provide the standard second pulse signal by the GPS receiver; When GPS receiver operation exception or when losing star, produce the standard second pulse signal in conjunction with 100M high precision constant temperature crystal oscillator by CPLD; The standard second pulse signal is delivered to capable ripple time keeping plate (4) after isolating through photoelectricity.Capable ripple that row ripple time keeping plate (4) will be imported and polarity of traveling wave signal are by behind the filtering circuit, with the synchronous 100MHz high precision of standard second pulse signal constant temperature crystal oscillator signal, to latch the time at the input signal due in, record row ripple channel number and polarity of traveling wave simultaneously, and temporal information, row ripple channel number and the polarity of traveling wave packing of latching formed row ripple information store.CPU (central processing unit) plate (5) reads the capable ripple information of storing in the ripple time keeping plate (4) of being expert at, carry out the stipulations conversion, produce the row wave datum, and will go wave datum and be sent to position computer (6), position computer (6) carries out localization of fault according to the capable ripple at faulty line two ends and calculate time of arrival.
As shown in Figure 2, the special-purpose traveling wave sensor of open type (1) is made up of two semi-circular high-frequency magnetic materials of symmetry, be advisable with double-deck coiling 5～30 circle coils of every part, general coiling 10 circle coils, two semi-circular high-frequency magnetic material iron cores are by bolt together.The special-purpose traveling wave sensor of open type (1) can suppress high-frequency signal, only transmits the high frequency jump signal between 100kHz～2MHz.
This electric network functional failure travelling wave locating device is actual electric network operation 3 years, operation result shows: energy is reliable, accurate, the fault traveling wave signal of Sensitive Detection substation transformer senior middle school all circuits of low-pressure side, the localization of fault error has broad prospect of application less than 150 meters.
Claims (4)
1, a kind of electric network functional failure travelling wave locating device is characterized in that it comprises:
The special-purpose traveling wave sensor (1) of open type is used to extract the transient state travelling wave signal;
Row wave-wave head check-out console (2) is used to detect the transient state travelling wave signal, and transient state travelling wave wave head signal is become the square-wave signal with certain amplitude, certain width;
Gps clock plate (3) is used to provide standard GPS pps pulse per second signal;
Row ripple time keeping plate (4), the time of arrival that is used to write down the transient state travelling wave wave head, storage line ripple information simultaneously;
CPU (central processing unit) plate (5), the capable ripple information that is used to read capable ripple time keeping plate (4) the record professional etiquette of going forward side by side is changed approximately and is formed capable wave datum, and will go wave datum and deliver to position computer (6);
Position computer (6) is used to carry out localization of fault and calculates.
2, electric network functional failure travelling wave locating device as claimed in claim 1, it is characterized in that: the special-purpose traveling wave sensor of described open type (1) is socketed on the earthing of casing line (8) of transformer (7), extract the electrical network transient signal, realize the transient signal of all outlets of transformer high, medium and low voltage is detected.
3, electric network functional failure travelling wave locating device as claimed in claim 1, it is characterized in that: the special-purpose traveling wave sensor of described open type (1) is made up of two semi-circular high-frequency magnetic materials of symmetry, double-deck coiling 5～30 circle coils of every part, two semi-circular high-frequency magnetic material iron cores by bolt together.
4, electric network functional failure travelling wave locating device as claimed in claim 3 is characterized in that: the double-deck coiling 10 circle coils of the every part of described two semi-circular high-frequency magnetic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200538048U CN201269915Y (en) | 2008-07-23 | 2008-07-23 | Travelling wave positioning apparatus for electricity grid failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200538048U CN201269915Y (en) | 2008-07-23 | 2008-07-23 | Travelling wave positioning apparatus for electricity grid failure |
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| Publication Number | Publication Date |
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| CN201269915Y true CN201269915Y (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200538048U Expired - Fee Related CN201269915Y (en) | 2008-07-23 | 2008-07-23 | Travelling wave positioning apparatus for electricity grid failure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592577A (en) * | 2013-11-26 | 2014-02-19 | 南京航空航天大学 | Integrated directional non-contact cable fault detection positioning sensing device |
| CN105448498A (en) * | 2015-12-07 | 2016-03-30 | 深圳供电局有限公司 | Traveling wave sensor and coil winding method for magnetic core for traveling wave sensor |
| CN105929303A (en) * | 2016-04-18 | 2016-09-07 | 国网山东省电力公司郓城县供电公司 | Power-supply network fault traveling wave positioning device |
| CN110161376A (en) * | 2019-06-24 | 2019-08-23 | 四川电安智能科技有限公司 | A kind of traveling wave fault moment extraction algorithm |
| CN111025088A (en) * | 2019-12-09 | 2020-04-17 | 北京铁诚精锐电力技术有限公司 | Railway power line fault positioning method and device |
-
2008
- 2008-07-23 CN CNU2008200538048U patent/CN201269915Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592577A (en) * | 2013-11-26 | 2014-02-19 | 南京航空航天大学 | Integrated directional non-contact cable fault detection positioning sensing device |
| CN103592577B (en) * | 2013-11-26 | 2016-05-04 | 南京航空航天大学 | The directed noncontact Cable fault examination of integral type orientation sensing device |
| CN105448498A (en) * | 2015-12-07 | 2016-03-30 | 深圳供电局有限公司 | Traveling wave sensor and coil winding method for magnetic core for traveling wave sensor |
| CN105929303A (en) * | 2016-04-18 | 2016-09-07 | 国网山东省电力公司郓城县供电公司 | Power-supply network fault traveling wave positioning device |
| CN110161376A (en) * | 2019-06-24 | 2019-08-23 | 四川电安智能科技有限公司 | A kind of traveling wave fault moment extraction algorithm |
| CN110161376B (en) * | 2019-06-24 | 2021-05-28 | 四川电安智能科技有限公司 | Traveling wave fault time extraction algorithm |
| CN111025088A (en) * | 2019-12-09 | 2020-04-17 | 北京铁诚精锐电力技术有限公司 | Railway power line fault positioning method and device |
| CN111025088B (en) * | 2019-12-09 | 2020-12-25 | 北京铁诚精锐电力技术有限公司 | Railway power line fault positioning method and device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20100723 |