CN205563184U - Zero -crossing detection medium -voltage switchgear controller - Google Patents
Zero -crossing detection medium -voltage switchgear controller Download PDFInfo
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- CN205563184U CN205563184U CN201620221646.7U CN201620221646U CN205563184U CN 205563184 U CN205563184 U CN 205563184U CN 201620221646 U CN201620221646 U CN 201620221646U CN 205563184 U CN205563184 U CN 205563184U
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Abstract
The utility model discloses a zero -crossing detection medium -voltage switchgear controller, including power module, CPU module, voltage acquisition module, electric current collection module and output module. Through voltage acquisition module and electric current collection module detection three phase voltage phase angle and three phase current phase angle, judge the zero crossing respectively, operate the time phase the zero -crossing time of voltage that ensures to close a floodgate, electric current zero crossing during the separating brake to the circuit switch through output module. A zero -crossing detection medium -voltage switchgear controller, has can reduce the overvoltage when closing a floodgate, can realize the advantage of no electric arc during at the separating brake.
Description
Technical field
This utility model relates to field of electrical equipment, is specially a kind of zero passage detection medium-voltage switch controller.
Background technology
Intelligent grid be built upon integrated, on the basis of high-speed bidirectional communication network, realize reliable, safety, the economy of electrical network and efficient target by advanced technology and method, provide the user electric power lasting, economic and safe.In recent years, although intelligent power grid technology achieves well development, but also encountering some problems: in city, overhead construction is obstructed, and circuit underground retrofit, newly-built cable loop are gradually increased, the annual growth rate of distribution line cable run accounting is exceedingly fast simultaneously；It addition, the most generally to there is radius of electricity supply long suburbs, rural area, the present situation cannot transformed immediately in short-term.The most all distribution line direct-to-ground capacitance is all made to increase substantially, capacity effect problem at substation exit is caused to highlight, and the distribution network systems overwhelming majority is small grounding current system, so compensating action for electric capacity is extremely low, close a floodgate after circuit fault trip or overlap circuit time, the significantly rising of power-frequency voltage amplitude will be caused because of the effect of capacitance voltage, thus produce switching overvoltage most commonly seen in power system.On the other hand, big electric current separating brake usually can arcing, the generation of arcing also influences whether reliability and the service life of switch controller.Traditional 10KV switch is all three-phase ganged, and three-phase deciliter instruction is all random, it is impossible to controls combined floodgate angle and the separating brake angle of switch, therefore, can cause overvoltage and arcing.
In sum, how can reduce overvoltage when closing a floodgate, at separating brake time can realize without electric arc, be industry technical problem urgently to be resolved hurrily.
Summary of the invention
In order to solve above-mentioned technical problem, this utility model provide one can close a floodgate time can reduce overvoltage, at separating brake time can realize Arc-free zero passage detection medium-voltage switch controller.
This utility model be the technical scheme is that by its technical problem of solution
A kind of zero passage detection medium-voltage switch controller, it is characterized in that: include power module, CPU module, voltage acquisition module, current acquisition module and output module, described power module is connected with CPU module, voltage acquisition module, current acquisition module and output module respectively, described CPU module connects by voltage acquisition module is corresponding with three-phase wire with current acquisition module respectively, described CPU module is also connected with output module, and the outfan of described output module connects by contactor is corresponding with three-phase wire respectively.
Further, described power module is connected with electric wire by a voltage transformer.
Further, described current acquisition module connects by a three-phase current sensor is corresponding with three-phase wire.
Further, described voltage acquisition module connects by a three-phase voltage sensor is corresponding with three-phase wire.
Further, zero passage detection medium-voltage switch controller also includes that a communication module, described communication module are connected with CPU module and power module respectively.
The beneficial effects of the utility model are: this utility model provides a kind of zero passage detection medium-voltage switch controller, switch controller control independent to three-phase wire, respectively detection three-phase voltage phase angle and three-phase current phase angle, judge zero crossing respectively, guarantee current zero-crossing point when three-phase wire combined floodgate phase voltage over zero and separating brake, closing overvoltage can be effectively reduced and eliminate separating brake electric arc, preventing the generation of switching overvoltage and arcing.
Accompanying drawing explanation
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
Fig. 1 is module diagram of the present utility model.
Detailed description of the invention
Referring to the drawings 1, this utility model zero passage detection medium-voltage switch controller includes power module 1, CPU module 2, voltage acquisition module 3, current acquisition module 4 and output module 5, described power module 1 respectively with CPU module 2, voltage acquisition module 3, current acquisition module 4 and output module 5 connect, described CPU module 2 connects by voltage acquisition module 3 is corresponding with three-phase wire with current acquisition module 4 respectively, described CPU module 2 is also connected with output module 5, the outfan of described output module 5 connects by contactor 6 is corresponding with three-phase wire respectively, described current acquisition module 4 connects by a three-phase current sensor 8 is corresponding with three-phase wire, described voltage acquisition module 3 connects by a three-phase voltage sensor 9 is corresponding with three-phase wire；It addition, also include a communication module 10, described communication module 10 is connected with CPU module 2 and power module 1 respectively.Wherein, power module 1 is respectively the module for power supply such as CPU module 2, voltage acquisition module 3, current acquisition module 4, output module 5 and communication module 10；CPU module 2 is DSP main control unit, and the coordination carrying out voltage data and the process of current data and modules controls；Voltage acquisition module 3 gathers voltage phase angle and magnitude of voltage by three-phase voltage sensor 9, and in like manner, current acquisition module 4 gathers current phase angle and current value by three-phase current sensor 8；Output module 5 control circuit switch 6, it is achieved the separating brake of circuit and combined floodgate；Communication module 10 and master station communication, upload main website by GPRS, note or optical fiber by the information gathered, and coordinates with main website and realizes SCADA function；Three-phase current sensor 8 will gather three-phase current；The phase voltage of 9 high-tension electricities of three-phase voltage sensor becomes the convenient control of AC100V and gathers.A kind of zero passage detection medium-voltage switch controller, detection three-phase voltage phase angle and three-phase current phase angle, judge zero crossing respectively, by output module 5, contactor 6 is operated, it is ensured that combined floodgate phase voltage over zero, current zero-crossing point during separating brake.As shown in Figure 1, three-phase wire is ABC three-phase wire.
As preferred implementation of the present utility model, described power module 1 is connected with electric wire by a voltage transformer 7, and voltage transformer 7, for directly power taking from electric wire, provides working power into modules after power module 1 is changed.Such passive design, directly can obtain electric energy from electric wire, simplify the structure of module.
Further, as preferred implementation of the present utility model, zero passage detection medium-voltage switch controller individually carries out current and voltage data collection, zero passage detection and folding respectively and controls three-phase wire.Contactor 6 switchs for three-phase independent agency, it is possible to accurately realizes three-phase and independently operates, it is to avoid influences each other.
The work process of zero passage detection medium-voltage switch controller is as follows:
1) voltage phase angle and the current phase angle numerical value of three-phase wire is individually detected by voltage acquisition module 3 and current acquisition module 4；
2) voltage acquisition module 3 and current acquisition module 4 respectively the voltage phase angle collected and current phase angle real-time Data Transmission to CPU module 2；
3) CPU module 2 carries out zero passage detection, judges the zero crossing of voltage and current respectively；
4) CPU module 2 is opened a sluice gate or separating brake according to zero passage detection data control circuit switch 6.
Wherein, when needs close a floodgate, CPU module 2 is when voltage phase angle is zero, by output module 5 control circuit switch 6 combined floodgate；When needs separating brake, CPU module 2, when current phase angle is zero, switchs 6 separating brakes by output module 5 control circuit.
Operation principle of the present utility model is described below in detail: a kind of zero passage detection medium-voltage switch controller, power module 1 is by the direct power taking from electric wire of voltage transformer 7, working power is provided for modules after converted, the data that voltage acquisition module 3 and current acquisition module 4 are gathered by CPU module 2 process, judge zero crossing respectively, and the separating brake of control circuit and combined floodgate, it is effectively reduced closing overvoltage and eliminates separating brake electric arc, preventing the generation of switching overvoltage and arcing.
It is above the preferably enforcement of utility model is illustrated, but this utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement on the premise of this utility model spirit, and modification or the replacement of these equivalents are all contained in the application claim limited range.
Claims (5)
1. a zero passage detection medium-voltage switch controller, it is characterized in that: include power module (1), CPU module (2), voltage acquisition module (3), current acquisition module (4) and output module (5), described power module (1) respectively with CPU module (2), voltage acquisition module (3), current acquisition module (4) and output module (5) connect, described CPU module (2) connects by voltage acquisition module (3) is corresponding with three-phase wire with current acquisition module (4) respectively, described CPU module (2) is also connected with output module (5), the outfan of described output module (5) connects by contactor (6) is corresponding with three-phase wire respectively.
A kind of zero passage detection medium-voltage switch controller the most according to claim 1, it is characterised in that: described power module (1) is connected with electric wire by a voltage transformer (7).
A kind of zero passage detection medium-voltage switch controller the most according to claim 1, it is characterised in that: described current acquisition module (4) connects by a three-phase current sensor (8) is corresponding with three-phase wire.
A kind of zero passage detection medium-voltage switch controller the most according to claim 1, it is characterised in that: described voltage acquisition module (3) connects by a three-phase voltage sensor (9) is corresponding with three-phase wire.
A kind of zero passage detection medium-voltage switch controller the most according to claim 1, it is characterised in that: also include that a communication module (10), described communication module (10) are connected with CPU module (2) and power module (1) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620221646.7U CN205563184U (en) | 2016-03-21 | 2016-03-21 | Zero -crossing detection medium -voltage switchgear controller |
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| CN201620221646.7U CN205563184U (en) | 2016-03-21 | 2016-03-21 | Zero -crossing detection medium -voltage switchgear controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300398A (en) * | 2016-10-18 | 2017-01-04 | 泰豪科技股份有限公司 | A kind of alternate load based on stable state waveform fitting transfer termination |
| CN110850242A (en) * | 2019-11-05 | 2020-02-28 | 深圳供电局有限公司 | Device and method for evaluating arc motion of high-voltage switch equipment with metal partition plate |
-
2016
- 2016-03-21 CN CN201620221646.7U patent/CN205563184U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300398A (en) * | 2016-10-18 | 2017-01-04 | 泰豪科技股份有限公司 | A kind of alternate load based on stable state waveform fitting transfer termination |
| CN106300398B (en) * | 2016-10-18 | 2019-12-27 | 泰豪科技股份有限公司 | Interphase load transfer terminal device based on steady-state waveform fitting |
| CN110850242A (en) * | 2019-11-05 | 2020-02-28 | 深圳供电局有限公司 | Device and method for evaluating arc motion of high-voltage switch equipment with metal partition plate |
| CN110850242B (en) * | 2019-11-05 | 2021-08-31 | 深圳供电局有限公司 | Device and method for evaluating arc motion of high-voltage switch equipment with metal partition plate |
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