CN201898373U - Power supply device used for malfunction ranging and locating of transmission line - Google Patents
Power supply device used for malfunction ranging and locating of transmission line Download PDFInfo
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- CN201898373U CN201898373U CN2010205395851U CN201020539585U CN201898373U CN 201898373 U CN201898373 U CN 201898373U CN 2010205395851 U CN2010205395851 U CN 2010205395851U CN 201020539585 U CN201020539585 U CN 201020539585U CN 201898373 U CN201898373 U CN 201898373U
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model relates to a power supply device used for malfunction ranging and locating of a transmission line, which belongs to the electric system field. Two or more mini-watt current generators are combined into a high-voltage direct current generator; the mini-watt current generators take turns to work through a change-over switch in a time-shared way, some mini-watt current generators generate high enough voltage and puncture line malfunction points again, and some mini-watt current generators output great enough current to maintain a stable malfunction state to create conditions for malfunction ranging, tracking and locating. Compared with the traditional technology, the power supply device has small power capacity and high reliability, saves power and is easy to realize and manufacture.
Description
Technical field
The utility model belongs to field of power, particularly a kind of supply unit that is used for measuring distance of transmission line fault and fault location.
Background technology
The electric energy that the power plant produces generally is transported to the user by transmission line (comprising overhead wire and power cable).When the transmission line insulation damages, enlarge for avoiding fault, power supply department can stop the power supply of faulty line usually, searches the fault point, changes trouble unit, restores electricity after fixing a breakdown.Because transmission line is longer, after the power failure, phenomenon of the failure also disappears immediately, manually searches relatively difficulty and time-consuming longer of fault point.So, after grid power blackout, reappear malfunction with manual type, calculate fault distance, to the fault trace location, shorten troubleshooting time, improve grid supply quality, significant.
The method that Chinese patent 03271299.5 has proposed a kind of " the direct current open circuit exchanges and seeks track ".Faulty line utilizes high-voltage D.C. generator that the fault point is punctured again after having a power failure, and the AC signal of reinjecting is sought track with detector road along the line, until finding the fault point.In fact, it is not enough that high voltage is only arranged, and does not have enough electric currents to support, the very fast high-impedance state that is returned to again in breakdown fault point, and AC signal can't be injected.With 10 kilovolt is example, and breakdown fault point needs 15000 volts of high pressure usually again, and keeping malfunction needs 5 peace electric currents approximately.By the conventional method design, the high-voltage D.C. generator capacity will reach 75 kilowatts.If be used for the more circuit of voltage levels, the high-voltage D.C. generator power capacity will be bigger, and cost is also higher, be difficult on the engineering realize.On the other hand, when the fault point punctured again, its equivalent load impedance descended suddenly significantly, can cause very big impact to high-voltage D.C. generator.The high-voltage D.C. generator of conventional method design will be difficult to withstand shocks and damage.。
The utility model content
The utility model proposes a kind of supply unit that is used for measuring distance of transmission line fault and fault location at the deficiencies in the prior art.
A kind of supply unit that is used for measuring distance of transmission line fault and fault location, combine by two or more small-power direct current generators, the parameter of each small-power direct current generator is equipped with different: the energy output HIGH voltage that has, but output current is less; What have can export big electric current, but output voltage is lower, and compound mode can be series system, parallel way or mix connecting mode that each small-power direct current generator is according to different operating state timeshare rotation work.
Causing line fault needs very high voltage usually, and fault is kept stable malfunction after taking place, and needs bigger electric current, and correspondent voltage is but very low.These characteristics according to line fault, traditional high-voltage D.C. generator can be divided into two or more small power electric flow-generators, the performance of these small power electric flow-generators has nothing in common with each other: what have is used to produce high voltage, but output current is less, and its effect is to cause line fault with high voltage; Being used to of having produces big electric current, but output voltage is lower, and its effect is to keep stable malfunction with big electric current.A plurality of small power electric flow-generators like this link together by certain mode, can produce very high voltage, and the breakdown fault point can provide bigger electric current again again, keeps stable malfunction, for fault point range finding and fault point seeking track Positioning Creates condition.With 10 kilovolt is example, can design two small power electric flow-generators.The basic index of a small power electric flow-generator is designed to: 15000 volts of voltages, and electric current 0.5 peace, capacity is 7.5 kilowatts, this small power electric flow-generator can abbreviate the high voltage-small current generator as; The basic index of another small power electric flow-generator is set at: 1500 volts of voltages, and electric current 5 peaces, capacity is 7.5 kilowatts, this small power electric flow-generator can abbreviate the low-voltage, high-current generator as; Two small power electric flow-generators are combined, and satisfy the condition that causes and keep line fault, and total capacity has only 15 kilowatts, than much smaller with single high-voltage D.C. generator capacity, and easier realization on the engineering.Because the effect difference of each small power electric flow-generator, in practical work process, their time of putting into operation can have nothing in common with each other.For example, when line fault is not initiated, the high voltage-small current generator that puts into operation, the break-off of low-voltage, high-current generator.After line fault is initiated, the low-voltage, high-current generator that puts into operation, the break-off of high voltage-small current generator.As long as conversion speed is enough fast, just can keep stable malfunction.Because two small power electric flow-generator wheels change jobs, the maximum power of actual consumption has only 7.5 kilowatts.Further, because two small power electric flow-generators wheel changes jobs, on circuit design, can common control circuit and part power circuit, further simplify circuit design, reduce cost.
The generation of high-voltage direct current raises with the transformer alternating voltage that voltage is lower earlier usually, with diode rectifier circuit or voltage-multiplying circuit interchange is become direct current then.As long as parameter is suitable, the rectification circuit of a plurality of different electric pressures can directly (perhaps be made isolated component with diode) and be connected in parallel, and also can directly be cascaded.After a plurality of small-power direct current generators are combined, switch, can realize each small-power direct current generator timeshare rotation work with change over switch (comprising mechanical switch or electronic switch).The installation site of change over switch can be in the low-pressure side of transformer, also can be in the high-pressure side.Because the cost of high pressure change over switch is higher relatively, is chosen in low-pressure side usually change over switch is installed.
Supply unit must be able to tolerate the impact of load impedance sudden change, and experiment shows, combines with DC chopped-wave constant-current circuit and inverter circuit, can solve shock problem.
Transmission line had certain leakage current before puncturing, can puncture again for guaranteeing the fault point, and can keep time enough, so that successfully switch to the low-voltage, high-current operating state, the output current of high voltage-small current generator should be greater than 100 milliamperes.
The output current of low-voltage, high-current generator is big more, can keep stable malfunction more, sets output current usually greater than 1 peace.
For obtaining more line fault information, the AC signal of need on direct current, superpose usually or several characteristic frequency.At this moment, as long as any one link in the current control loop of low-voltage, high-current generator, particularly on the given DC quantity of electric current, the alternating current component of stack characteristic frequency can make the alternating current component that includes characteristic frequency in the direct current of output.By alternating current in the measurement circuitry and alternating voltage component, can calculate fault distance and seek the track location along the line,
Also can design plural small power electric flow-generator, the small power electric flow-generator of design is many more, and the target setting of each small power electric flow-generator just can be thin more, and required maximum consumption of power is just low more, and shortcoming is to cause circuit design to become complicated.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the utility model embodiment 2.
Embodiment
Fig. 1 is the structural representation of the utility model embodiment 1, adopts the electronic switch conversion.Among the figure, power switch pipe Q0, reactor L and other corresponding electronic components are formed the DC chopped-wave constant-current circuit, guarantee that the operating current of subsequent conditioning circuit is stable, even under the situation of load suddenly-applied short circuit, operating current can over proof numerical value yet.Six power switch pipe Q1-Q6 form the inverter circuit of two timeshare rotation work.When Q3, Q4, Q5 and Q6 work, Q1 and Q2 end, transformer T1 work, and through behind the rectification circuit, maximum output voltage 15000V, maximum output current 0.5A is used for again the breakdown fault point.When Q1, Q2, Q3 and Q4 work, Q5 and Q6 end, transformer T2 work, and through behind the rectification circuit, maximum output voltage 1500V, maximum output current 5A is used to keep stable malfunction.Output circuit is combined as parallel way, and diode D1 plays buffer action, prevents that high tension voltage from passing to low-voltage circuit, normally is in series by a plurality of diodes.
Fig. 2 is the structural representation of the utility model embodiment 2, adopts the mechanical switch conversion.Among the figure, power switch pipe Q0, reactor L and other corresponding electronic components are formed the DC chopped-wave constant-current circuit, guarantee that the operating current of subsequent conditioning circuit is stable, even under the situation of load suddenly-applied short circuit, operating current can over proof numerical value yet.4 power switch pipe Q1-Q4 form a full bridge inverter.Relay K 1 finishes high voltage-small current and the low-voltage, high-current operating state is switched.When relay K 1 is connected to transformer T1, circuit maximum output voltage 15000V, maximum output current 0.5A is used for again the breakdown fault point.When relay K 1 is connected to transformer T2, circuit maximum output voltage 1500V, maximum output current 5A is used to keep stable malfunction.Combination of circuits is a parallel way, and diode D1 plays buffer action, prevents that high tension voltage from passing to low-voltage circuit, normally is in series by a plurality of diodes.
Claims (5)
1. supply unit that is used for measuring distance of transmission line fault and fault location, combine by two or more small-power direct current generators, it is characterized in that: the parameter of each small-power direct current generator is equipped with different, and each small-power direct current generator is according to different operating state timeshare rotation work.
2. the supply unit that is used for measuring distance of transmission line fault and fault location according to claim 1 is characterized in that: switch with change over switch, realize each small-power direct current generator timeshare rotation work.
3. the supply unit that is used for measuring distance of transmission line fault and fault location according to claim 1 and 2 is characterized in that: combine with DC chopped-wave constant-current circuit and inverter circuit.
4. the supply unit that is used for measuring distance of transmission line fault and fault location according to claim 1 and 2 is characterized in that: the output current of high voltage-small current generator is greater than 100 milliamperes, and the output current of low-voltage, high-current generator is greater than 1 peace.
5. the supply unit that is used for measuring distance of transmission line fault and fault location according to claim 1 and 2, it is characterized in that: any one link in the current control loop of low-voltage, high-current generator, particularly on the given DC quantity of electric current, the alternating current component of stack characteristic frequency makes the alternating current component that includes characteristic frequency in the direct current of output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205395851U CN201898373U (en) | 2010-09-25 | 2010-09-25 | Power supply device used for malfunction ranging and locating of transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205395851U CN201898373U (en) | 2010-09-25 | 2010-09-25 | Power supply device used for malfunction ranging and locating of transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201898373U true CN201898373U (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205395851U Expired - Fee Related CN201898373U (en) | 2010-09-25 | 2010-09-25 | Power supply device used for malfunction ranging and locating of transmission line |
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| CN (1) | CN201898373U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411102A (en) * | 2011-07-29 | 2012-04-11 | 株洲南车时代电气股份有限公司 | System and method for power examination test of large-power rectifier |
| CN105589002A (en) * | 2016-02-04 | 2016-05-18 | 珠海许继电气有限公司 | 10 kV intelligent switch cabinet automatic testing system |
| CN105634304A (en) * | 2016-03-25 | 2016-06-01 | 苏州华电电气股份有限公司 | Intelligent direct-current high-stability high-voltage generator |
| CN107706042A (en) * | 2017-10-16 | 2018-02-16 | 深圳供电局有限公司 | A kind of emergency operation circuit for permanent magnetic vacuum breaker |
-
2010
- 2010-09-25 CN CN2010205395851U patent/CN201898373U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411102A (en) * | 2011-07-29 | 2012-04-11 | 株洲南车时代电气股份有限公司 | System and method for power examination test of large-power rectifier |
| CN102411102B (en) * | 2011-07-29 | 2013-10-23 | 株洲南车时代电气股份有限公司 | System and method for power examination test of large-power rectifier |
| CN105589002A (en) * | 2016-02-04 | 2016-05-18 | 珠海许继电气有限公司 | 10 kV intelligent switch cabinet automatic testing system |
| CN105589002B (en) * | 2016-02-04 | 2019-02-12 | 珠海许继电气有限公司 | 10kV intelligent switchboard Auto-Test System |
| CN105634304A (en) * | 2016-03-25 | 2016-06-01 | 苏州华电电气股份有限公司 | Intelligent direct-current high-stability high-voltage generator |
| CN107706042A (en) * | 2017-10-16 | 2018-02-16 | 深圳供电局有限公司 | A kind of emergency operation circuit for permanent magnetic vacuum breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20110713 Termination date: 20170925 |