CN205067693U - High -voltage switch machinery and electrical characteristics detector - Google Patents
High -voltage switch machinery and electrical characteristics detector Download PDFInfo
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- CN205067693U CN205067693U CN201520861679.3U CN201520861679U CN205067693U CN 205067693 U CN205067693 U CN 205067693U CN 201520861679 U CN201520861679 U CN 201520861679U CN 205067693 U CN205067693 U CN 205067693U
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Abstract
Press switch machinery and electrical characteristics detector, including the at least one sampling return circuit unit that is used for gathering high -voltage switch's machinery and electric feature data, with the electric a central processing unit who is connected of the output of this sampling return circuit unit, can hold the electric output unit who is connected with the electric input unit who is connected of this a central processing unit's output and with this a central processing unit's messenger, sampling return circuit unit includes looks voltage measurement module, sample and hold module and a AD conversion module who is used for carrying on the three -phase sampling. The utility model discloses simple structure, practicality are strong, through setting up looks voltage measurement module, sample and hold module and AD conversion module, can become the comprehensive measuring instrument who is arranged in measuring with analysis electric power system high -voltage switch machinery and the electric performance index of electrical characteristics, can realize on -load tap -changer's transit time, the measurement of pass through wave form, voltage measurement 0, three -phase synchronism isoparametric, have voltage measurement 1, voltage measurement 2 together, voltage measurement 3 is good, the precision is high.
Description
Technical field
The utility model relates to high-voltage switch gear online measuring technique, refers in particular to a kind of composite measurement instrument for measuring and analyze electric system high-voltage switch machinery and electrical specification electricity function index.
Background technology
High-voltage switch gear is also known as primary cut-out, and it mainly refers to rated voltage 3kV and the above electrical equipment being mainly used in cut-offfing and closing galvanic circle.
At present the inspection of primary cut-out running status is mainly passed through to mechanical movement characteristic and the insulation status of power failure test both opens device operating mechanism, because operations staff cannot grasp the mechanical movement situation of breaker operation mechanism in time, cause within the preventative maintenance cycle, also often have accident to occur.According to statistics: the mechanical fault of primary cut-out accounts for its institute out of order more than 90%, and wherein the fault of operating mechanism occupies very large ratio, therefore the mechanical property must paying close attention to primary cut-out is diagnosed.Along with being gradually improved of computer technology, signal transacting, artificial intelligence and sensing technology, on-line checkingi being carried out to the running status of electrical equipment and becomes possibility.
Chinese invention patent application (application number: 201310193477.1, publication number: 103323770A) disclose the detection of a kind of mechanical characteristic of high-voltage circuit breaker and trouble-shooter, it mainly comprises power module, AD conversion module, USB/RS232 communication module, computing machine, signal processing module, control module, acquisition module and USB/RS232 communication module.Although above device can the fault of Timeliness coverage high-tension switch gear, but also has the following disadvantages in the use procedure of reality: 1, volume is relatively large, single-piece frame is heavier, uses comparatively inconvenience; 2, electrical equipment is many, device structure is complicated, and under hyperbaric environment, antijamming capability is limited, causes accuracy of detection lower.
Utility model content
The utility model provides high-voltage switch gear machinery and electrical specification detector, and its fundamental purpose is to overcome the use inconvenience that existing high-voltage switch gear on-line measuring device exists, the defect that antijamming capability is not enough and accuracy of detection is low.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
High-voltage switch gear machinery and electrical specification detector, comprise the sampling circuit unit of at least one machinery for gathering high-voltage switch gear and electric characteristic data, the CPU (central processing unit) be electrically connected with the output terminal of this sampling circuit unit, the input block be electrically connected with the output terminal of this CPU (central processing unit) and the output unit be electrically connected with the Enable Pin of this CPU (central processing unit), described sampling circuit unit comprises one for carrying out the phase voltage measurement module of three phase samplers, sampling keeps module and AD conversion module, the output terminal of described phase voltage measurement module is connected to the Enable Pin of described sampling maintenance module, described sampling keeps the output terminal of module to be connected to the Enable Pin of described AD conversion module, the output terminal of described AD conversion module is connected to the Enable Pin of described CPU (central processing unit).
Further, each sampling keeps model calling in the output terminal of a current regulator, this current regulator also includes a DC power supply terminal mouth and a data input pin, wherein direct current supply port is electrically connected on an alternating current-direct current filtering circuit, data input pin is connected to the output terminal in a voltage compare loop, and the Enable Pin in described voltage compare loop is connected to and is connected to equally on alternating current-direct current filtering circuit.
Further, described sampling circuit unit is provided with three, and the phase voltage measurement module on these three sampling circuit unit is respectively A phase voltage measurement module, B phase voltage measurement module and C phase voltage measurement module.
Further, described input block comprises a keyboard portion be electrically connected with described CPU (central processing unit).
Further, described output unit comprises the display section and printing portion that are electrically connected with CPU (central processing unit) respectively.
Further, described CPU (central processing unit) is a single-chip microcomputer, and this single-chip microcomputer is electrically connected with an electronic memory and a data switching port.
Further; the Enable Pin of A phase voltage measurement module, B phase voltage measurement module and C phase voltage measurement module is electrically connected on the output terminal of a protection circuit simultaneously, and the Enable Pin of this protection circuit is connected on the high-voltage switch gear that needs to carry out collection machinery and electric characteristic data.
Further, described data switching port is RS232 interface.
Compared to the prior art, the beneficial effect that the utility model produces is:
1, the utility model structure is simple, practical, by arranging phase voltage measurement module, sampling keeps module and AD conversion module, the composite measurement instrument for measuring and analyze electric system high-voltage switch machinery and electrical specification electricity function index can be become, the transit time to load ratio bridging switch, transition waveform, transition resistance, the isoparametric measurement of three-phase synchronism can be realized, with have easy to use, lightweight, good in anti-interference performance, precision are high.
2, in the utility model; by arranging alternating current-direct current filtering circuit, current regulator, voltage compare loop and protection circuit; effectively can eliminate the impact of hyperbaric environment on electric equipment element; make to adopt consisting of high-voltage switch gear machinery and electrical specification detector can the defect of Timeliness coverage high-tension switch gear; the incidence of reduction accident, reduces workload and the frequency of power cut of equipment preventive trial and maintenance.Therefore, this patent focuses on the application of research fingerprint envelope in mechanical characteristic of high-voltage circuit breaker diagnosis.The safe operation of primary cut-out can be guaranteed and improve the reliability of Operation of Electric Systems, take on-line checkingi as the predictive maintenance that the state monitor maintenance of foundation progressively replaces based on preventive trial, or make up the deficiency of preventive trial, extend the cycle of predictive maintenance, this all has great Technological Economy and is worth in theory and practice.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the circuit diagram of the filtering circuit of alternating current-direct current described in the utility model.
Fig. 3 is the circuit diagram of current regulator described in the utility model.
Fig. 4 is the circuit diagram in the loop of voltage compare described in the utility model.
The oscillogram of Fig. 5 is the utility model transition resistance and transit time in use.
Embodiment
Embodiment of the present utility model is described with reference to the accompanying drawings.
With reference to Fig. 1.High-voltage switch gear machinery and electrical specification detector, comprise the sampling circuit unit 2 of at least one machinery for gathering high-voltage switch gear 1 and electric characteristic data, the CPU (central processing unit) be electrically connected with the output terminal of this sampling circuit unit 2, the input block be electrically connected with the output terminal of this CPU (central processing unit) and the output unit be electrically connected with the Enable Pin of this CPU (central processing unit), described sampling circuit unit 2 comprises one for carrying out the phase voltage measurement module of three phase samplers, sampling keeps module 21 and AD conversion module 22, the output terminal of described phase voltage measurement module is connected to the Enable Pin of described sampling maintenance module 21, described sampling keeps the output terminal of module 21 to be connected to the Enable Pin of described AD conversion module 22, the output terminal of described AD conversion module 22 is connected to the Enable Pin of described CPU (central processing unit).By arranging phase voltage measurement module, sampling keeps module 21 and AD conversion module 22, the composite measurement instrument for measuring and analyze electric system high-voltage switch 1 machinery and electrical specification electricity function index can be become, the transit time to load ratio bridging switch, transition waveform, transition resistance, the isoparametric measurement of three-phase synchronism can be realized, with have easy to use, lightweight, good in anti-interference performance, precision are high.
With reference to Fig. 1.Each sampling keeps module 21 to be connected to the output terminal of a current regulator 3, this current regulator 3 also includes a DC power supply terminal mouth and a data input pin, wherein direct current supply port is electrically connected on an alternating current-direct current filtering circuit 4, data input pin is connected to the output terminal in a voltage compare loop 5, and the Enable Pin in described voltage compare loop 5 is connected to and is connected to equally on alternating current-direct current filtering circuit 4.By arranging alternating current-direct current filtering circuit 4, current regulator 3, voltage compare loop 5, effectively can eliminate the impact of hyperbaric environment on electric equipment element, make to adopt consisting of high-voltage switch gear 1 machinery and electrical specification detector can the defect of Timeliness coverage high-tension switch gear, the incidence of reduction accident, reduces workload and the frequency of power cut of equipment preventive trial and maintenance.Therefore, this patent focuses on the application of research fingerprint envelope in mechanical characteristic of high-voltage circuit breaker diagnosis.The safe operation of primary cut-out can be guaranteed and improve the reliability of Operation of Electric Systems, take on-line checkingi as the predictive maintenance that the state monitor maintenance of foundation progressively replaces based on preventive trial, or make up the deficiency of preventive trial, extend the cycle of predictive maintenance, this all has great Technological Economy and is worth in theory and practice.
With reference to Fig. 1.Described sampling circuit unit 2 is provided with three, and the phase voltage measurement module on these three sampling circuit unit 2 is respectively A phase voltage measurement module 23, B phase voltage measurement module 24 and C phase voltage measurement module 25.The Enable Pin of A phase voltage measurement module 23, B phase voltage measurement module 24 and C phase voltage measurement module 25 is electrically connected on the output terminal of a protection circuit 6 simultaneously, and the Enable Pin of this protection circuit 6 is connected on the high-voltage switch gear 1 that needs to carry out collection machinery and electric characteristic data.
With reference to Fig. 1.Described input block comprises a keyboard portion 70 be electrically connected with described CPU (central processing unit).Described output unit comprises the display section 71 and printing portion 72 that are electrically connected with CPU (central processing unit) respectively.Described CPU (central processing unit) is a single-chip microcomputer 8, and this single-chip microcomputer 8 is electrically connected with electronic memory 73(and ERAM) and a data switching port.Described data switching port is RS232 interface 74.
With reference to Fig. 1.Circuit theory of the present utility model is: export the DC current of 1A on the switch of transformer, isolating switch etc. by current regulator 3 circuit, obtain its d. c. voltage signal from from load ratio bridging switch joint simultaneously, then carry out sampling, keep, AD conversion, the operation such as display, directly show its transition resistance, transition current, three-phase synchronism and waveform by the inter-process of single-chip microcomputer.
With reference to Fig. 1 and Fig. 3.Current regulator 3 circuit regulates electric current to 1A by the mode of closed-loop control automatically, its concrete control method: DC voltage is carried on the H bridge of 4 metal-oxide-semiconductor compositions, then receive in the loop of LRC by transformer and VD1, VD2, closed-loop control controls the break-make of metal-oxide-semiconductor by PWM device, thus makes outputting current steadily be 1A.
With reference to Fig. 2.Alternating current-direct current filtering circuit 4 effectively can suppress electric network noise, improves the Electro Magnetic Compatibility of tester and reliability, selects second order common-mode filter here, here main filtering switching noise and the harmonic wave that caused by input line.When there is common mode interference in circuit, because the flow direction of two coils in L is consistent, after overcoupling, total inductance amount increases rapidly, thus produces very large induction reactance to common-mode signal, make it to not easily pass through, these two coils are respectively around on the ferrite bead of low-loss, high permeability.Directly grounded two electric capacity C1, C2 are mainly used to filtering series mode interference.L1, D1 and D2 form excess voltage suppressor and surge suppressor jointly, prevent from exceeding their specified momentary outputs and pass through, protection subsequent conditioning circuit.By after rectifier again by DC filtering with filtering spiking etc.
With reference to Fig. 4.In order to improve modulus conversion chip precision and current regulator 3 circuit stable output, reduce the many factors such as temperature, drift to the impact of equipment precision, voltage compare loop 5 utilizes accurate voltage chip LM2940 to set up high-precision voltage reference, and making reference voltage keep stable further by amplifier LM158A, physical circuit is as shown in Figure 4.
Sampling keeps module 21 to adopt model to be that the sampling of LF398 keeps chip, and its feature is made up of field effect transistor, have sample rate high, keep the slow and precision high of voltage drop.When as single amplifier, its DC current gain precision is 0.002%, and when the sampling time is less than 6 μ s, precision can reach 0.01%; The adjustment of input offset voltage only need adjust at offset side, and when not reducing bias current, bandwidth allows 1MHz, can ensure the same period and the accuracy requirement of three phase samplers so completely.
AD conversion module 22 adopts model to be the AD conversion chip of (AD7705), and it is a complete AFE (analog front end) for low frequency measurement application scenario, for directly receiving small-signal from circuit and exporting serial digital amount.It uses sigma-delta switch technology to realize can not losing up to the code of 24 precision, and has 3 difference analogue inputs and a differential reference input, for connecing reference signal.
The sampling circuit unit 2 of tester as shown in Figure 1, voltage signal keeps chip and AD sampling A/D chip finally to deliver in single-chip microcomputer by special sampling, single-chip microcomputer carries out analyzing and processing to the waveform be made up of transition resistance, transition current (as shown in Figure 5), finally directly be presented on display section, also printable part communicates with by RS232 interface simultaneously.
Above are only embodiment of the present utility model, but design concept of the present utility model is not limited thereto, all changes utilizing this design the utility model to be carried out to unsubstantiality, all should belong to the behavior of invading the utility model protection domain.
Claims (8)
1. high-voltage switch gear machinery and electrical specification detector, it is characterized in that: the sampling circuit unit comprising at least one machinery for gathering high-voltage switch gear and electric characteristic data, the CPU (central processing unit) be electrically connected with the output terminal of this sampling circuit unit, the input block be electrically connected with the output terminal of this CPU (central processing unit) and the output unit be electrically connected with the Enable Pin of this CPU (central processing unit), described sampling circuit unit comprises one for carrying out the phase voltage measurement module of three phase samplers, sampling keeps module and AD conversion module, the output terminal of described phase voltage measurement module is connected to the Enable Pin of described sampling maintenance module, described sampling keeps the output terminal of module to be connected to the Enable Pin of described AD conversion module, the output terminal of described AD conversion module is connected to the Enable Pin of described CPU (central processing unit).
2. as claimed in claim 1 high-voltage switch gear machinery and electrical specification detector, it is characterized in that: each sampling keeps model calling in the output terminal of a current regulator, this current regulator also includes a DC power supply terminal mouth and a data input pin, wherein direct current supply port is electrically connected on an alternating current-direct current filtering circuit, data input pin is connected to the output terminal in a voltage compare loop, and the Enable Pin in described voltage compare loop is connected to and is connected to equally on alternating current-direct current filtering circuit.
3. as claimed in claim 1 high-voltage switch gear machinery and electrical specification detector, it is characterized in that: described sampling circuit unit is provided with three, the phase voltage measurement module on these three sampling circuit unit is respectively A phase voltage measurement module, B phase voltage measurement module and C phase voltage measurement module.
4. as claimed in claim 1 high-voltage switch gear machinery and electrical specification detector, it is characterized in that: described input block comprises a keyboard portion be electrically connected with described CPU (central processing unit).
5. as claimed in claim 1 high-voltage switch gear machinery and electrical specification detector, it is characterized in that: described output unit comprises the display section and printing portion that are electrically connected with CPU (central processing unit) respectively.
6. as claimed in claim 1 high-voltage switch gear machinery and electrical specification detector, it is characterized in that: described CPU (central processing unit) is a single-chip microcomputer, this single-chip microcomputer is electrically connected with an electronic memory and a data switching port.
7. as claimed in claim 3 high-voltage switch gear machinery and electrical specification detector; it is characterized in that: the Enable Pin of A phase voltage measurement module, B phase voltage measurement module and C phase voltage measurement module is electrically connected on the output terminal of a protection circuit simultaneously, the Enable Pin of this protection circuit is connected on the high-voltage switch gear that needs to carry out collection machinery and electric characteristic data.
8. as claimed in claim 6 high-voltage switch gear machinery and electrical specification detector, it is characterized in that: described data switching port is RS232 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520861679.3U CN205067693U (en) | 2015-11-02 | 2015-11-02 | High -voltage switch machinery and electrical characteristics detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520861679.3U CN205067693U (en) | 2015-11-02 | 2015-11-02 | High -voltage switch machinery and electrical characteristics detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557008A (en) * | 2020-12-01 | 2021-03-26 | 合肥新沪屏蔽泵有限公司 | Test system of water pump button |
| CN113092999A (en) * | 2021-04-02 | 2021-07-09 | 中国第一汽车股份有限公司 | Switching value input diagnosis device and diagnosis method |
| CN115524608A (en) * | 2022-10-13 | 2022-12-27 | 常熟理工学院 | Low-voltage intelligent on-line detection sensing device for on-off synchronization of circuit breaker |
-
2015
- 2015-11-02 CN CN201520861679.3U patent/CN205067693U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557008A (en) * | 2020-12-01 | 2021-03-26 | 合肥新沪屏蔽泵有限公司 | Test system of water pump button |
| CN113092999A (en) * | 2021-04-02 | 2021-07-09 | 中国第一汽车股份有限公司 | Switching value input diagnosis device and diagnosis method |
| CN115524608A (en) * | 2022-10-13 | 2022-12-27 | 常熟理工学院 | Low-voltage intelligent on-line detection sensing device for on-off synchronization of circuit breaker |
| CN115524608B (en) * | 2022-10-13 | 2023-08-11 | 常熟理工学院 | Switching-on and switching-off synchronism online detection sensing device of low-voltage intelligent circuit breaker |
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