CN2720450Y - High-voltage transmission line parameter detector - Google Patents
High-voltage transmission line parameter detector Download PDFInfo
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- CN2720450Y CN2720450Y CN 200420079020 CN200420079020U CN2720450Y CN 2720450 Y CN2720450 Y CN 2720450Y CN 200420079020 CN200420079020 CN 200420079020 CN 200420079020 U CN200420079020 U CN 200420079020U CN 2720450 Y CN2720450 Y CN 2720450Y
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Abstract
The utility model discloses a high-voltage transmission line parameter detector which belongs to the technical field of power supply measuring. The detector comprises a CPU module, a frequency-shift signal generating module, an IPM module, a filter circuit, a three-phase transformer, an output sample-taking and control module, an AD converting circuit, a drive circuit, an analogue quantity processing module and a liquid crystal screen. The output sample-taking and control module comprises a relay control return circuit which is connected with the secondary side of the three-phase transformer. Two phases of the three-phase transformer are respectively connected with two series relays, and the third phase is connected with a relay and then outputs connecting load. The mid-point of the secondary side of the three phase transformer is connected with the earth through a relay. When the high-voltage transmission line parameter detector is in use, only the on-off state of every relay is altered, different testing power supply output signals can be output to load. The high-voltage transmission line parameter detector therefore finishes various detecting of parameters needed, largely simplifies detecting operation, increases working efficiency, and brings great convenience to field tests.
Description
Technical field
The utility model relates to a kind of tester, and especially a kind of parameter tester that is applicable to ultra-high-tension power transmission line belongs to the power supply technical field of measurement and test.
Background technology
Measure at present the ultra-high-tension power transmission line power frequency parameter on the engineering and use trichotomy usually, when measuring positive order parameter, need apply three-phase supply, measure voltage in three phases, electric current and power signal; When measuring Zero sequence parameter, single phase poaer supply be need apply, single-phase voltage, electric current and power signal measured.Owing to still there is not desirable testing tool, need use powerful three-phase transformer, pressure regulator when therefore testing, after applying power-frequency voltage on the test line, by discrete meter meters such as reometer, voltage table, power meters, respectively show scale and after corresponding computing, try to achieve each parameter value by reading.The volume and weight of testing tool is bigger, and especially the connection complexity between each table meter need change when measuring different parameters and measure wiring and instrument wiring, and testing experiment is loaded down with trivial details.
The utility model content
The purpose of this utility model is: design a kind of relay control circuit, thereby different conditions by pilot relay, use low power frequency-shift signaling, propose the ultra-high-tension power transmission line parameter tester that a kind of wiring relation that need not manually to change test line can be measured various required ultra-high-tension power transmission line power frequency parameters.
In order to reach above purpose, ultra-high-tension power transmission line parameter tester of the present utility model comprises the CPU module, frequency-shift signaling generation module, the IPM module, filtering circuit, three-phase transformer, output sampling and control module, A/D convertor circuit, driving circuit, analog quantity processing module and display device, the power supply input connects the IPM module after frequency-shift signaling generation module produces frequency-shift signaling, by connecing filtering circuit after the IPM module amplification output, the output of filtering circuit is connected with output sampling and control module through three-phase transformer, the signal output part of described output sampling and control module is behind analog quantity processing and AD modular converter, connect the signal input part of CPU, the shows signal output termination display device of described CPU.In addition, contain relay control circuit in output sampling and the control module, described relay control circuit connects the secondary of three-phase transformer, and output connect load after wherein two-phase connect two series relay, another relay that joins respectively, and the mid point of described three-phase transformer secondary is through a relay ground connection.
Like this, as long as required, change the on off operating mode of each relay, can change the mode of connection of load, constitute required test loop, to the different testing power supply output signal of load output, thereby finish the three-phase voltage when measuring positive order parameter, electric current and power test, and the single-phase voltage when measuring Zero sequence parameter, the test of various desired parameters such as electric current and power test, also constitute the use single phase poaer supply and measured the needed measurement of triphase parameter loop, can use single plane method to calculate needed triphase parameter by the preface impedance matrix, do not need manually to change the wiring relation of test line fully, simplified test operation greatly, improved work efficiency, and help to reduce the volume and the weight of instrument, for site test brings great convenience.
During the use test instrument, test lead external load with output sampling and control module repeat circuit control loop, select to confirm measuring operation by the menu that shows on the liquid crystal display by knob, instrument is the mode of connection of the tested loaded line of control automatically, apply the shift frequency measuring-signal to tested load, the signal of sampling is presented at measurement result on the liquid crystal display by CPU through respective handling and after calculating, and can be selected to preserve or print by the tester in case of necessity.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is the measurement wiring schematic diagram of an embodiment of the utility model.
Fig. 2 is the schematic block circuit diagram of Fig. 1 embodiment.
Fig. 3 is the relay automatic control loop synoptic diagram of Fig. 1 embodiment.
Embodiment
Embodiment one
The ultra-high-tension power transmission line parameter tester of present embodiment, wiring schematic diagram is referring to Fig. 1 when carrying out the zero sequence impedance measurement.During measurement, only need the measuring lead wire of test line correctly is connected with the slotted line of instrument, after the operation, instrument can be measured calculating according to measuring the automatic output power of instruction, and measurement result is presented on the liquid crystal display, and is very convenient.
The schematic block circuit diagram of present embodiment as shown in Figure 2, comprise in the block diagram and realize needed each unit module of the utility model and interface relationship, wherein 0 is MB (motherboard) circuit board, 1 is cpu pcb, 2 is Signal signal generating circuit plate, 3 is the IPM circuit board, 4 is the LC filtering circuit, and 5 is transformer, and 6 are Relay output sampling and control circuit board, 7 are load Zx, 8 is liquid crystal display and knob, and 9 is the AD circuit board, and 10 is the IO drive circuit board, 11 is Deal analog quantity treatment circuit plate, and 12 is the Power power module.
The connection of above each several part and signal transitive relation are: associated circuit board (1,2,9,10,11,12) patches by a connector and MB (0) respectively, realize following the connection: cpu pcb (1) adopts PC104 high speed industrial computer as central processing unit, send steering order and carry out overall situation control, there are an interface and liquid crystal display LCD (8) to carry out communication, display routine interface and related data, and the instruction of the outer bound pair knob of reception; Signal signal generating circuit plate (2) as frequency-shift signaling generation module is inserted on the MB (0), under CPU module (1) control, produce frequency-shift signaling, and link to each other with IPM circuit board (3), carry out the shift frequency power signal and amplify (detailed description is seen below) by a connector; The shift frequency control signal that IPM circuit board (3) passes over according to Signal circuit board (2) produces the high-power frequency-shift signaling that is used to measure, and gives filtering circuit (4) and carries out waveform processing; High-frequency harmonic composition in the SPWM frequency-converter power signal that three-phase LC filtering circuit (4) filtering IPM (3) sends improves after the waveform quality, connects three-phase transformer (5); After isolating filtered IPM power signal, three-phase transformer Tr (5) connects Relay output sampling and control module (6); This Relay module (6) is exported control with the frequency-shift signaling after the transformer isolation, the state of the instruction control relay that transmits according to different measuring task and IO circuit board (10), the form in handover measurement loop, sensing lead Zx (7) parameter, and voltage, the current signal of output sampled, give Deal circuit board (11) with the secondary singal that obtains through cable and handle; Load Zx (7) links to each other with the output of Relay module (6), shift frequency voltage, current signal is introduced carried out measuring operation in the tested load; LCD liquid crystal display and knob (8) display routine interface, and send to CPU module (1) by the steering order that knob obtains by data line and respond; AD module (9) obtains the simulating signal that need are handled from MB (0), carries out correlation computations and processing in inside, gives CPU (1) with the result who obtains by the data line on the MB (0) and handles; IO driving circuit (10) is gone up the data command that transmits according to MB (0), drives the relay on the Relay module (6), the form in control survey loop; To sample from Relay module (6) voltage and current signal that obtains of Deal analog quantity disposable plates (11) carries out analog quantity and handles, and the simulating signal after will handling passes through MB (0) and give AD module (9), is input to cpu pcb (1).Power power module (12) is inserted on the MB (0), through MB (0) general+5V, ± 12V ,-power supplys such as 24V give each module.More than relevant module under the unified instruction control of CPU (0), according to the program of presetting, the response test task is finished measuring operation.
Relay control circuit among Fig. 2 in Relay output sampling and the control circuit board as shown in Figure 3, the mid point of three-phase transformer secondary is through normally opened relay J6 ground connection, the A of secondary meets test output terminal A after normally closed relay J 1, the B of secondary, C two-phase meet two test output terminal B and C in addition through normally closed relay J2, J4 and J3, the J5 of series connection respectively.And the normally opened contact of J4, J5 two relays links to each other with A.
During the use test instrument, three-phase supply be can apply, positive sequence impedance and zero sequence impedance measured by relay control circuit, and the phase self-impedance and the phase transimpedance that apply the single phase poaer supply measuring circuit.Concrete control requires as follows:
When measuring the phase self-impedance: under the condition of circuit offside three-phase shortcircuit ground connection, in A, B, the C three-phase line, appoint two-phase unsettled, apply the impedance of voltage, current measurement third phase line-to-ground, the result is the phase self-impedance of phase circuit for this reason.When measuring the phase transimpedance, arbitrary mutually unsettled in A, B, the C three-phase line under the condition of circuit offside three-phase shortcircuit ground connection, apply the alternate impedance of voltage, current measurement other two, the result is this two alternate phase transimpedance.
After obtaining phase self-impedance and mutual impedance parameter, can calculate the zero sequence impedance and the positive sequence impedance parameter of this three-phase line, also realize simultaneously using single phase poaer supply to measure the purpose of three-phase line impedance parameter by the preface impedance matrix.
Though the number of times that uses single plane method to measure is more, and need constantly to change the mode of connection of test line, but attracting state by pilot relay control loop repeat circuit, use low power frequency-shift signaling to suppress the influence that power frequency interference signals is brought, just can form the different measurement loop of loading easily, under the control of CPU, measure automatically and calculate, thereby make things convenient for the carrying out of site test greatly, avoid the trouble of manual wiring.
Conclusion is got up, and more than the relay state of a control of Ce Lianging is as shown in the table:
| Test event | J1 | J2 | J3 | J4 | J5 | J6 | |
| Zero sequence impedance | Open | Open | Open | Close | Close | Close | |
| Positive sequence impedance | Open | Open | Open | Open | Open | Open | |
| The phase self-impedance is measured | A | Open | Close | Close | Open | Open | Open |
| B | Close | Open | Close | Close | Open | ||
| C | Close | Close | Open | Open | Close | ||
| Impedance measurement mutually | AB | Open | Open | Close | Open | Open | |
| BC | Close | Open | Open | Open | Close | ||
| CA | Open | Close | Open | Open | Open | ||
(establish the relay original state and be " opening ", be " closing " after the relay adhesive)
Present embodiment is a core with industrial computer PC104, use the high-speed AD module and carry out data processing, using high-power IPM module to carry out power produces and controls, adopt high-precision mutual inductor to carry out the multirange sampling, and various functional modules effectively are integrated in the same casing, only need the outside that 220V is provided AC power, test loop is correctly connected, can test.Whole instrument as shown in Figure 1, volume is little, and is in light weight, is convenient to transportation, on-the-spot easy to use.In addition, can use the single-phase power signal,, carry out the test of ultra-high-tension power transmission line three-phase main-frequency parameter by the computing of preface impedance matrix.
In a word, the utility model is realized measurement function by adopting integrated measurement technology, select according to the tester, can carry out the isoparametric measurement of coupling capacitance between the electromagnetic induction voltage, positive sequence impedance, zero sequence impedance, mutual inductance reactance, positive sequence electric capacity, zero sequence electric capacity, circuit of ultra-high-tension power transmission line.Compared with prior art, when carrying out various parameter measurement, only need instrument correctly is connected with test line, need not to change the mode of connection of tested this side of transmission line of electricity, therefore greatly simplified test operation, improved test job efficient.
Claims (3)
1. ultra-high-tension power transmission line parameter tester, comprise the CPU module, frequency-shift signaling generation module, the IPM module, filtering circuit, three-phase transformer, output sampling and control module, A/D convertor circuit, driving circuit, analog quantity processing module and display device, the power supply input connects the IPM module behind frequency-shift signaling generation module shift frequency, by connecing filtering circuit after the IPM module amplification output, the output of filtering circuit is connected with output sampling and control module through three-phase transformer, the signal output part of described output sampling and control module connects the signal input part of CPU through analog quantity processing and AD modular converter, the shows signal output termination display device of described CPU, it is characterized in that: contain relay control circuit in described output sampling and the control module, described relay control circuit connects the secondary of three-phase transformer, wherein two-phase connects two series relay respectively, output connects load behind another relay that joins, and the mid point of described three-phase transformer secondary is through a relay ground connection.
2. according to the described ultra-high-tension power transmission line parameter tester of claim 1, it is characterized in that: the mid point of described three-phase transformer secondary is through normally opened relay ground connection, first of secondary connects test output terminal behind normally closed relay, the second and the 3rd two-phase of secondary connects two test output terminals in addition through the normally closed relay of series connection respectively.
3. according to the described ultra-high-tension power transmission line parameter tester of claim 2, it is characterized in that: all have the normally opened contact of a relay to link to each other in described two groups of series connection normally closed relays with first.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079020 CN2720450Y (en) | 2004-08-27 | 2004-08-27 | High-voltage transmission line parameter detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079020 CN2720450Y (en) | 2004-08-27 | 2004-08-27 | High-voltage transmission line parameter detector |
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| Publication Number | Publication Date |
|---|---|
| CN2720450Y true CN2720450Y (en) | 2005-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420079020 Expired - Fee Related CN2720450Y (en) | 2004-08-27 | 2004-08-27 | High-voltage transmission line parameter detector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590627A (en) * | 2012-04-01 | 2012-07-18 | 甘肃省电力公司电力科学研究院 | Test instrument for high-voltage power transmission line |
| CN103344837A (en) * | 2013-07-11 | 2013-10-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for measuring parameters of two-circuit direct current transmission line with double circuits on same tower |
| CN103777079A (en) * | 2014-02-07 | 2014-05-07 | 国网上海市电力公司 | Anti-interference parameter integration testing device for ultra-high voltage line |
| CN103954869A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Cable power frequency parameter testing device based on PXI system |
| CN106546774A (en) * | 2015-09-18 | 2017-03-29 | 山东天庆电力设备有限公司 | A kind of automatic connection control device for Electrical Power Line Parameter test |
| CN106980070A (en) * | 2017-05-12 | 2017-07-25 | 国网天津市电力公司 | The measuring system and method for a kind of transmission line parameter |
-
2004
- 2004-08-27 CN CN 200420079020 patent/CN2720450Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590627A (en) * | 2012-04-01 | 2012-07-18 | 甘肃省电力公司电力科学研究院 | Test instrument for high-voltage power transmission line |
| CN102590627B (en) * | 2012-04-01 | 2013-10-23 | 甘肃省电力公司电力科学研究院 | Test instrument for high-voltage power transmission line |
| CN103344837A (en) * | 2013-07-11 | 2013-10-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for measuring parameters of two-circuit direct current transmission line with double circuits on same tower |
| CN103344837B (en) * | 2013-07-11 | 2015-04-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for measuring parameters of two-circuit direct current transmission line with double circuits on same tower |
| CN103777079A (en) * | 2014-02-07 | 2014-05-07 | 国网上海市电力公司 | Anti-interference parameter integration testing device for ultra-high voltage line |
| CN103954869A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Cable power frequency parameter testing device based on PXI system |
| CN103954869B (en) * | 2014-05-12 | 2017-01-25 | 国家电网公司 | Cable power frequency parameter testing device based on PXI system |
| CN106546774A (en) * | 2015-09-18 | 2017-03-29 | 山东天庆电力设备有限公司 | A kind of automatic connection control device for Electrical Power Line Parameter test |
| CN106980070A (en) * | 2017-05-12 | 2017-07-25 | 国网天津市电力公司 | The measuring system and method for a kind of transmission line parameter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |