CN205039524U - Transformer combined floodgate excitation surge current annihilator - Google Patents
Transformer combined floodgate excitation surge current annihilator Download PDFInfo
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- CN205039524U CN205039524U CN201520828110.7U CN201520828110U CN205039524U CN 205039524 U CN205039524 U CN 205039524U CN 201520828110 U CN201520828110 U CN 201520828110U CN 205039524 U CN205039524 U CN 205039524U
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- circuit breaker
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Abstract
The utility model provides a transformer combined floodgate excitation surge current annihilator, includes voltage measurement module, controller, power module, and the voltage measurement module is connected with side voltage transformer of system and load side voltage transformer respectively, and voltage detecting is connection director still, and power module is connected to the controller, the voltage measurement module is used for measuring grid system side and load side busbar voltage, and including voltage changer, voltage formation and operational amplifier return circuit, sample and hold and AD converter, the voltage changer is connected voltage and is formed and the operational amplifier return circuit voltage formation and operational amplifier loop connection sample and hold and AD converter, the utility model provides a transformer combined floodgate excitation surge current annihilator can eliminate transformer combined floodgate excitation surge current totally, makes the transformer close a floodgate and does not pass through transient, does not produce any harm to grid system and environment.
Description
Technical field
The utility model relates to power transformer field, is specifically related to a kind of Transformer Close magnetizing inrush current arrester.
Background technology
Transformer is the visual plant carrying out power conversion in electric power system; for a long time; the magnetizing inrush current of higher magnitude always can be produced during Transformer Close; usually cause tranformer protection action and failure of closing a floodgate; also because magnetizing inrush current is comparatively large, harmonic wave is complicated and have harmful effect to system and other power equipment, traditional direct combined floodgate inevitably produces magnetizing inrush current.
Summary of the invention
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, a kind of Transformer Close magnetizing inrush current arrester is provided, can eliminating transformer combined floodgate magnetizing inrush current completely, make Transformer Close without transient process, any harm is not produced to network system and environment.
To achieve these goals, the technical solution of the utility model is: a kind of Transformer Close magnetizing inrush current arrester, comprise voltage measurement module, controller, power module, voltage measurement module is connected with system side voltage transformer and load side voltage instrument transformer respectively, voltage detecting is connection control device also, and controller connects power module; Described voltage measurement module is for measuring network system side and load-side busbar voltage, comprise voltage changer, voltage is formed and operational amplifier loop, sampling maintenance and AD converter, voltage changer connects voltage and is formed and operational amplifier loop, and voltage is formed and the connection sampling of operational amplifier loop keeps and AD converter; Described controller comprises CPU module, PWM drive circuit, human-machine interface module, breaker control and block of state, CPU module is connected with sampling and keeps and AD converter, and CPU module is also connected with block of state with PWM drive circuit, human-machine interface module, breaker control respectively; Described power module comprises field power supply, rectifier filter, PWM inverter, field power supply connects rectifier filter, rectifier filter connects PWM inverter, and PWM inverter connects main transformer load-side, and rectifier filter is also connected with PWM drive circuit with PWM inverter; Described rectifier filter and PWM inverter are made up of high-power electric and electronic electrical equipment.
Preferably, also comprise excitation transformer, excitation transformer is located between PWM inverter and load-side bus, when excitation side voltage is higher, excitation transformer can be used to raise exciting voltage to static exciter side rated voltage.
Preferably, described human-machine interface module comprises display, keyboard, for CPU module input system parameter, control command etc.
Preferably, described breaker control and block of state comprise photoisolator, parallel interface, photoisolator is located at system side circuit breaker and load-side circuit breaker place, the position of system side circuit breaker, load-side circuit breaker, status signal, after the isolation conversion of photoisolator, connect CPU module by parallel interface; Meanwhile, CPU is sent separating brake by parallel interface, photoisolator to system side circuit breaker, load-side circuit breaker, closes a floodgate and order, and controls separating brake, the combined floodgate of circuit breaker.
Preferably, described high-power electric and electronic electrical equipment is IGBT, IGCT, GTO, MOSFET or SIT.
The utility model provides a kind of Transformer Close magnetizing inrush current arrester, and beneficial effect is as follows:
1, adopt the mode of asynchronous switch-on, cardinal principle, thoroughly solve a Transformer Close magnetizing inrush current difficult problem, meanwhile, there is the advantages such as voltage control is accurate, stable output, response time short, applicable quick-switching.
2, adopt high-power electric and electronic electrical equipment, when excitation side voltage is not high, can not adopt boosting excitation transformer, therefore, compact conformation, volume are little, lightweight, can be made into the portable structure of movable type, vehicular, are applicable to industrial mass manufacture.
3, adopt novel high-power power electronic device, power and the response speed of whole arrester can be improved, be applicable to using in the complicated severe electromagnetic environment such as transformer station, electric locomotive.
4, can according to the structure of transformer and application, Transformer Close magnetizing inrush current arrester can be single-phase or three-phase mode.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Fig. 1 is the structural representation that the utility model Transformer Close magnetizing inrush current arrester is connected with electrical network;
Fig. 2 is the structural representation of the utility model Transformer Close magnetizing inrush current arrester.
Embodiment
As shown in Figure 1, 2, a kind of Transformer Close magnetizing inrush current arrester, comprising:
(1) voltage measurement module, voltage measurement module comprises voltage changer, voltage is formed and operational amplifier loop, sampling maintenance and AD converter, system side and load-side primary side voltage, after voltage transformer, voltage measurement module, are converted to digital signal, read in CPU module.
(2) power module, power module is made up of field power supply, rectifier filter, PWM inverter, and field power supply adopts 380/220V AC power, after conversion, for transformer provides exciting voltage; Field power supply connects rectifier filter, and rectifier filter connects PWM inverter, and PWM inverter connects main transformer load-side; The three-phase full-controlled rectifier bridge that rectifier filter is made up of device for high-power power electronic such as 6 groups of IGBT, IGCT, GTO, MOSFET or SIT, filtering capacitor form; The three-phase fully-controlled inverter bridge that PWM inverter is made up of 6 groups of device for high-power power electronic, its structure, element and three-phase full-controlled rectifier bridge are just the same, under control of the controller, under being operated in rectifier system, the input both positive and negative polarity of PWM inverter connects rectifier filter output, and rectifier bridge is connected with the PWM drive circuit of controller with inverter bridge power electronic device grid G 1 to G12.Its function, the while that field power supply first being become direct voltage by rectifying and wave-filtering, is reverse into alternating voltage through PWM mode, then boost to load side voltage, for Transformer Close provides exciting current through necessary excitation transformer.
(3) controller, the output of grid side voltage transformer and load side voltage instrument transformer is connected to and is formed by voltage changer, voltage and operational amplifier loop, sampling keeps and AD converter forms voltage measurement module, the output of voltage measurement module is connected to the data/address bus of CPU module, for measuring network system side and load-side busbar voltage; Breaker control and block of state output are connected to the input/output interface of CPU module, and for inputting circuit-breaker status information to CPU module, and CPU sends separating brake to circuit breaker, order of closing a floodgate; PWM drive circuit input is connected to the input/output interface of CPU module, grid control command is sent to the device for high-power power electronic of rectifier and PWM inverter for CPU module, control conducting and the cut-off of device for high-power power electronic, complete and field power supply is transformed into static exciter voltage through rectifying and wave-filtering, PWM inversion, Transformer Close exciting current is provided.Human-machine interface module is connected to the input/output interface of CPU module, comprises display, keyboard etc., for CPU module input system parameter, control command etc.
Meanwhile, running environment during Transformer Close, the network system equipment that should possess: system side bus, load-side bus, system side voltage transformer, load side voltage instrument transformer, system side circuit breaker, load-side circuit breaker, and field power supply; Transformer Close magnetizing inrush current arrester of the present utility model is being connected normally with above-mentioned network system equipment, startup optimization.
The parameter that controller inputs according to man-machine interface and the system side bus that voltage measurement module is measured and load-side busbar voltage, by adjustment PWM function waveform, regulate rectifier filter, the conducting of PWM inverter device for high-power power electronic group and cut-off, control PWM inverter output current to increase fast from 0, transformer magnetizing current is made to be increased to rated exciting current without transient process from 0, the voltage of voltage transformer system side winding is made to reach rapidly size and the phase place of network system voltage, and the voltage of voltage transformer system side winding and network system voltage keep stablizing synchronous, PWM inverter output voltage in this process to output to the time reaching stable state very short, but transformer does not produce magnetizing inrush current.
Described breaker control and block of state, comprise photoisolator, parallel interface, and CPU module, after the isolation conversion of photoisolator, by parallel interface, is read in the position of system side circuit breaker, load-side circuit breaker, status signal; Meanwhile, CPU is sent separating brake by parallel interface, photoisolator to system side circuit breaker, load-side circuit breaker, closes a floodgate and order, and controls separating brake, the combined floodgate of circuit breaker.
Man-machine interface is used for operator to controller module input control parameter and control command, device of the present utility model is before putting into operation, should first complete correct wiring, CPU module correctly reads in both sides bus voltage signal and circuit breaker position and status signal, and operator is started and order out of service etc. to device input combined floodgate transformer of the present utility model and excitation transformer parameter, field power supply parameter, plant running mode, device by man-machine interface.
Described rectifier filter and PWM inverter module are high-power electric and electronic circuit, be made up of high-power electric and electronic electrical equipment (IGBT, IGCT, GTO, MOSFET or SIT etc.) and filtering capacitor group, rectifier filter and PWM inverter, its grid control section is formed by PWM drive circuit, CPU module sends control command, controller conducting and cut-off by bus and parallel interface to the device for high-power power electronic grid of rectifier filter and PWM inverter.
A kind of method that Transformer Close magnetizing inrush current is eliminated, under the controller of Transformer Close magnetizing inrush current arrester controls, the exciting voltage of amplitude increase fast from 0 is added at transformer load side winding, and on the winding of voltage transformer system side, produce the winding voltage consistent with system side busbar voltage phase place, when transformer load side exciting current reaches rated exciting current, voltage transformer system side winding produces rated voltage, by controller fine setting PWM inverter modulation signal, make voltage transformer system side winding voltage and system side busbar voltage size, phase place is completely the same, meet asynchronous switch-on condition, during system side breaker closing, steady magnetic field is established in transformer core, Transformer Close is without transient process, magnetizing inrush current is not produced in winding.
A kind of method that Transformer Close magnetizing inrush current is eliminated: before transformer during no-load closing, CPU module is by regulating PWM modulation signal, by bus and parallel interface, device for high-power power electronic grid to rectifier filter and PWM inverter sends control command, control conducting and the cut-off of high power device, thus control the output voltage that PWM inverter exports increase fast from 0, the exciting voltage of combined floodgate main transformer is become through excitation transformer boosting; CPU module controls PWM modulation signal, make its phase place compound according to transformer parameter result of calculation, amplitude be from 0, increase fast by predefined function (as ramp function, hyperbolic functions etc.) curve, PWM inverter output voltage is made to reach stationary value fast, excitation transformer output voltage reaches the rated excitation voltage of combined floodgate main transformer fast, the exciting current produced in Transformer Winding also increases fast and reaches rated value rapidly from 0, and voltage transformer system side winding voltage also reaches burning voltage fast; By the bus of measuring system side and the load-side voltage through voltage transformer input CPU module, the phase place of calculating transformer system side winding voltage and system side busbar voltage and difference in magnitude, fine setting PWM inverter modulation signal, make voltage transformer system side winding voltage and system side busbar voltage size, phase place completely the same, meet asynchronous switch-on condition completely, now, controller sends to system side circuit breaker order of closing a floodgate, and transformer completes closing operation; During Transformer Close, built vertical steady magnetic field in iron core, winding voltage equals system side busbar voltage, and Transformer Close directly enters steady-state operating condition without transient process, does not produce magnetizing inrush current in Transformer Winding.Now, Transformer Close magnetizing inrush current arrester can quit work, state out of service.
For needing the transformer working in frequent separating brake, "on" position because of running environment; high voltage, high-power transformer; applying Transformer Close magnetizing inrush current arrester of the present utility model can the adverse effect such as voltage fluctuation, harmonic wave brought system of eliminating transformer combined floodgate magnetizing inrush current, avoids Transformer Close to cause the generation of the state such as sympathetic inrush, system equipment damage of false protection, operating transformer.Transformer Close magnetizing inrush current arrester of the present utility model is also suitable for the applied environments such as single-phase transformer, electric locomotive and traction transformer.
Claims (5)
1. a Transformer Close magnetizing inrush current arrester, comprise voltage measurement module, controller, power module, it is characterized in that: voltage measurement module is connected with system side voltage transformer and load side voltage instrument transformer respectively, voltage detecting is connection control device also, and controller connects power module;
Described voltage measurement module is for measuring network system side and load-side busbar voltage, comprise voltage changer, voltage is formed and operational amplifier loop, sampling maintenance and AD converter, voltage changer connects voltage and is formed and operational amplifier loop, and voltage is formed and the connection sampling of operational amplifier loop keeps and AD converter;
Described controller comprises CPU module, PWM drive circuit, human-machine interface module, breaker control and block of state, CPU module is connected with sampling and keeps and AD converter, and CPU module is also connected with block of state with PWM drive circuit, human-machine interface module, breaker control respectively;
Described power module comprises field power supply, rectifier filter, PWM inverter, field power supply connects rectifier filter, rectifier filter connects PWM inverter, and PWM inverter connects main transformer load-side, and rectifier filter is also connected with PWM drive circuit with PWM inverter; Described rectifier filter and PWM inverter are made up of high-power electric and electronic electrical equipment.
2. a kind of Transformer Close magnetizing inrush current arrester according to claim 1, it is characterized in that: also comprise excitation transformer, excitation transformer is located between PWM inverter and load-side bus.
3. a kind of Transformer Close magnetizing inrush current arrester according to claim 1, is characterized in that: described human-machine interface module comprises display, keyboard, for CPU module input system parameter, control command.
4. a kind of Transformer Close magnetizing inrush current arrester according to claim 1, it is characterized in that: described breaker control and block of state comprise photoisolator, parallel interface, photoisolator is located at system side circuit breaker and load-side circuit breaker place, the position of system side circuit breaker, load-side circuit breaker, status signal, after the isolation conversion of photoisolator, connect CPU module by parallel interface; Meanwhile, CPU is sent separating brake by parallel interface, photoisolator to system side circuit breaker, load-side circuit breaker, closes a floodgate and order, and controls separating brake, the combined floodgate of circuit breaker.
5. a kind of Transformer Close magnetizing inrush current arrester according to claim 1, is characterized in that: described high-power electric and electronic electrical equipment is IGBT, IGCT, GTO, MOSFET or SIT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520828110.7U CN205039524U (en) | 2015-10-26 | 2015-10-26 | Transformer combined floodgate excitation surge current annihilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520828110.7U CN205039524U (en) | 2015-10-26 | 2015-10-26 | Transformer combined floodgate excitation surge current annihilator |
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| Publication Number | Publication Date |
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| CN205039524U true CN205039524U (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520828110.7U Expired - Fee Related CN205039524U (en) | 2015-10-26 | 2015-10-26 | Transformer combined floodgate excitation surge current annihilator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226610A (en) * | 2015-10-26 | 2016-01-06 | 三峡大学 | A kind of Transformer Close magnetizing inrush current arrester |
| WO2018023817A1 (en) * | 2016-08-05 | 2018-02-08 | 北京千驷驭电气有限公司 | Transformer closing control system and inrush-less control method |
| CN111600284A (en) * | 2020-03-05 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Excitation inrush current suppression method applied to power frequency transformer in controllable inversion |
| WO2023092696A1 (en) * | 2021-11-24 | 2023-06-01 | 广东福德电子有限公司 | Multifunctional self-checking switching-on power supply device |
-
2015
- 2015-10-26 CN CN201520828110.7U patent/CN205039524U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226610A (en) * | 2015-10-26 | 2016-01-06 | 三峡大学 | A kind of Transformer Close magnetizing inrush current arrester |
| CN105226610B (en) * | 2015-10-26 | 2017-11-24 | 三峡大学 | A kind of Transformer Close excitation surge current arrester |
| WO2018023817A1 (en) * | 2016-08-05 | 2018-02-08 | 北京千驷驭电气有限公司 | Transformer closing control system and inrush-less control method |
| CN111600284A (en) * | 2020-03-05 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Excitation inrush current suppression method applied to power frequency transformer in controllable inversion |
| WO2023092696A1 (en) * | 2021-11-24 | 2023-06-01 | 广东福德电子有限公司 | Multifunctional self-checking switching-on power supply device |
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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 |
Granted publication date: 20160217 Termination date: 20181026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |