CN203606657U - Controller for voltage-transformer excitation characteristic tester - Google Patents
Controller for voltage-transformer excitation characteristic tester Download PDFInfo
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- CN203606657U CN203606657U CN201320806560.7U CN201320806560U CN203606657U CN 203606657 U CN203606657 U CN 203606657U CN 201320806560 U CN201320806560 U CN 201320806560U CN 203606657 U CN203606657 U CN 203606657U
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Abstract
The utility model relates to a controller for a voltage-transformer excitation characteristic tester, belonging to the technical field of excitation characteristic test. The utility model aims at providing the controller with a high efficiency and precision. The controller comprises a control panel, a central data processing circuit, a drive circuit, a power circuit and a voltage and current sampling circuit, wherein the control panel is connected with the central data processing circuit, the central data processing circuit is connected with the drive circuit and the voltage and current sampling circuit, the power circuit is connected with the drive circuit and the voltage and current sampling circuit, and the output end of the power circuit is connected with a secondary terminal of a voltage transformer. The controller for the voltage-transformer excitation characteristic tester can be applied to electric power departments.
Description
Technical field
The utility model voltage transformer (VT) excitation characteristic test instrument control device, belongs to excitation characteristic test technical field, is specifically related to the device of a kind of convenience to voltage transformer (VT) excitation characteristic test.
Background technology
Along with electrical network scale is day by day huge, the further of power transmission and transformation equipment state overhauling work gos deep into, and the requirement of State Overhaul Test of Electric Equipment is also stricter; Capacity and the intelligent degree of the efficiency to equipment test, the precision of test data, test apparatus are all had higher requirement, voltage transformer (VT) detects and the visual plant of second protection as transformer substation voltage, it is carried out to state evaluation is most important accurately; The excitation characteristic test project of voltage transformer (VT) is the necessary project that electromagnetic potential transformer is carried out to diagnostic test of 5.4.2 bar regulation in " power transmission and transformation equipment state overhauling testing regulations ".
At present, market lacks excitation characteristic test device specialty, high-intelligentization degree, in test, still adopt the manual test method of the most original pressure regulator+voltage table+reometer, when test, need to carry the series of experiments instruments such as pressure regulator, voltage table, reometer, test wire, equipment volume is large, weight is heavy, test figure precision is low, complex operation, wiring trouble, data processing are time-consuming, serious waste time and manpower.
Utility model content
The utility model overcomes the deficiency that prior art exists, and technical matters to be solved is: the voltage transformer (VT) excitation characteristic test instrument that a kind of efficiency is high and precision is high control device is provided.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: voltage transformer (VT) excitation characteristic test instrument control device, comprise: control panel, central data treatment circuit, driving circuit, power circuit and electric current and voltage sample circuit, described control panel is connected with central data treatment circuit, described central data treatment circuit is connected with electric current and voltage sample circuit with driving circuit respectively, described power circuit is connected with electric current and voltage sample circuit with driving circuit respectively, and the output terminal of described power circuit is connected with the secondary terminals of voltage transformer (VT).
Described power circuit comprises: rectifier bridge, electric capacity of voltage regulation C1, IGBT inverter and filtering circuit, and described filtering circuit comprises filter inductance L1 and filter capacitor C2;
The ac input end of described rectifier bridge connects 220V AC power, the DC output end of rectifier bridge and meet electric capacity of voltage regulation C1 after be connected with the input end of above-mentioned IGBT inverter, after an output terminal serial connection filter inductance L1 of described IGBT inverter, be connected with one end of filter capacitor C2, another output terminal of IGBT inverter is connected with the other end of filter capacitor C2, and the output terminal that the two ends of filter capacitor C2 are power circuit is connected with the secondary terminals of above-mentioned voltage transformer (VT).
Described electric current and voltage sample circuit comprises two voltage hall sensors and a current Hall sensor; Described the first voltage hall sensor is attempted by the two ends of electric capacity of voltage regulation C1, described second voltage Hall element is attempted by the two ends of filter capacitor C2, described current Hall sensor is serially connected on the line between filter capacitor C2 and voltage transformer (VT), and the signal output part of above-mentioned voltage hall sensor and current Hall sensor is all connected with central data treatment circuit.
Described central data treatment circuit comprises: DSP control module, CPLD control module, crystal oscillating circuit module, electric current and voltage sampling conditioning circuit module, open into/output module and power module, described DSP control module respectively with above-mentioned CPLD control module, crystal oscillating circuit module, electric current and voltage sampling conditioning circuit module and open into/output module to be connected, described power module is that whole central data treatment circuit is powered; Described DSP control module is connected with above-mentioned control panel, and described CPLD control module is connected with above-mentioned driving circuit, and described electric current and voltage sampling conditioning circuit module is connected with above-mentioned electric current and voltage sample circuit.
Described driving circuit adopts the driving chip that model is 2SD315A.
Described DSP control module adopts the floating type DSP circuit unit that model is TMS320F28335.
The beneficial effect that the utility model compared with prior art has is:
One, the utility model utilizes high performance float-point type digital signal processing chip to realize the control of test unit, improves to a great extent speed and the precision controlled, makes whole control system have good adjusting function and reliability;
Two, the utility model adopts DSP control module to add CPLD control module forming control system, and hardware circuit is simple, output trigger pulse is safe and reliable, precision of real time control is high, and device has higher stability and reliability;
Three, the utility model power circuit adopts IGBT module as main circuit, can improve installed capacity and bucking voltage, improves the harmonic characteristic of output voltage, strengthens the stability of output voltage;
Four, the utility model adopts 2SD315A to drive the flip chip of chip as driving pulse, has the defencive function that driving force is strong, control facilitates and have overvoltage, overcurrent.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail:
Fig. 1 is electrical block diagram of the present utility model;
Fig. 2 is the electrical block diagram of the utility model central data treatment circuit 2;
Fig. 3 is the electrical block diagram of driving circuit 3 in the utility model;
In figure: 1 for control panel, 2 for central data treatment circuit, 3 for driving circuit, 4 for voltage transformer (VT), 5 for rectifier bridge, 6 for IGBT inverter, 7 be the first voltage hall sensor, 8 for second voltage Hall element, 9 for current Hall sensor, 10 for DSP control module, 11 for CPLD control module, 12 for crystal oscillating circuit module, 13 for electric current and voltage sampling conditioning circuit module, 14 for open into/to output module, 15 be power module.
Embodiment
As shown in Figure 1, the utility model voltage transformer (VT) excitation characteristic test instrument control device, comprise: control panel 1, central data treatment circuit 2, driving circuit 3, power circuit and electric current and voltage sample circuit, described control panel 1 is connected with central data treatment circuit 2, described central data treatment circuit 2 is connected with electric current and voltage sample circuit with driving circuit 3 respectively, described power circuit is connected with electric current and voltage sample circuit with driving circuit 3 respectively, and the output terminal of described power circuit is connected with the secondary terminals of voltage transformer (VT) 4.
Described power circuit comprises: rectifier bridge 5, electric capacity of voltage regulation C1, IGBT inverter 6 and filtering circuit, and described filtering circuit comprises filter inductance L1 and filter capacitor C2; The ac input end of described rectifier bridge 5 connects 220V AC power, the DC output end of rectifier bridge 5 and meet electric capacity of voltage regulation C1 after be connected with the input end of above-mentioned IGBT inverter 6, after an output terminal serial connection filter inductance L1 of described IGBT inverter 6, be connected with one end of filter capacitor C2, another output terminal of IGBT inverter 6 is connected with the other end of filter capacitor C2, and the output terminal that the two ends of filter capacitor C2 are power circuit is connected with the secondary terminals of above-mentioned voltage transformer (VT) 4.
Above-mentioned rectifier bridge 5 adopts two and two string modes to connect by 4 diodes, and two brachium pontis middle pin access 220V alternating currents, for being converted into pulsating dc voltage by 220V alternating current by rectifier bridge; Described electric capacity of voltage regulation C1 is connected between rectifier bridge 5 and IGBT inverter 6, pulsating dc voltage is become to galvanic current and press; Described IGBT inverter 6 adopts two and two string modes to connect by 4 supervisors of the IGBT containing fly-wheel diode, its one end is connected to the positive terminal of electric capacity of voltage regulation C1, the other end is connected to the negative phase end of electric capacity of voltage regulation C1, and DC voltage is converted into variable pulsation alternating voltage by IGBT inverter 6; Described filtering circuit is made up of filter inductance L1 and filter capacitor C2, and its input end is connected with the mid point of two brachium pontis middle pins of IGBT inverter 6, and its effect is carried out filtering by pulsation alternating voltage and obtained stable variable AC voltage.
Described electric current and voltage sample circuit comprises two voltage hall sensors and a current Hall sensor; Described the first voltage hall sensor 7 is attempted by the two ends of electric capacity of voltage regulation C1, described second voltage Hall element 8 is attempted by the two ends of filter capacitor C2, described current Hall sensor 9 is serially connected on the line between filter capacitor C2 and voltage transformer (VT) 4, the signal output part of above-mentioned voltage hall sensor and current Hall sensor is all connected with central data treatment circuit 2, and the electric current and voltage value of the main circuit of collection is sent to central data treatment circuit 2.
As shown in Figure 2, described central data treatment circuit 2 comprises: DSP control module 10, CPLD control module 11, crystal oscillating circuit module 12, electric current and voltage sampling conditioning circuit module 13, open into/output module 14 and power module 15, described DSP control module 10 respectively with above-mentioned CPLD control module 11, crystal oscillating circuit module 12, electric current and voltage sampling conditioning circuit module 13 with open into/output module 14 to be connected, described DSP control module 10 is two-way with CPLD control module 11 and is connected, the output terminal of described crystal oscillating circuit module 12 is connected with the input pin of DSP control module 10, for DSP control module 10 provides stable crystal oscillator frequency, described electric current and voltage sampling conditioning circuit module 13 is connected with the A/D pin of DSP control module 10, described open into/output module 14 to be formed by sister's circuit of central data treatment circuit 2, and being two-way with central data treatment circuit 2 is connected, described power module 15 is powered for whole central data treatment circuit 2.
It is the floating type DSP circuit unit of TMS320F28335 that described DSP control module 10 adopts model, described DSP control module 10 and above-mentioned two-way being connected of control panel 1, described CPLD control module 11 and above-mentioned two-way being connected of driving circuit 3, described electric current and voltage sampling conditioning circuit module 13 is connected with above-mentioned electric current and voltage sample circuit.
As shown in Figure 3, it is the driving chip of 2SD315A that described driving circuit 3 adopts model, its Main Function is that the gating pulse that CPLD control module 11 is sent is carried out power amplification, for controlling the break-make of IGBT inverter 6, wherein drive the input end of chip to receive the 4 tunnel gating pulse of being sent by CPLD control module 11,2 described tunnel feedback signals are that the duty of driving circuit 3 is fed back to CPLD control module 11, and described driving circuit 3 is exported to 4 road driving pulses of output in the circuit of IGBT inverter 6.
Above-mentioned central data treatment circuit 2 carries out COMPREHENSIVE CALCULATING according to the value of user's input and the numerical value of electric current and voltage sample circuit collection, draw corresponding Sine Modulated waveform, calculate and generate corresponding control signal by DSP control module 10, being transferred to CPLD control module 11 processes, CPLD control module 11 is converted into control signal the gating pulse of 4 tunnels correspondences and IGBT inverter 6, 4 tunnel gating pulse are sent to driving circuit 3 by CPLD control module 11, driving circuit 3 carries out after power amplification gating pulse, 4 IGBT components and parts of access IGBT inverter 6, by the work of driving pulse control inverter, the DC voltage of voltage regulation capacitor C1 is become to variable alternating voltage, the alternating voltage of stable output after device filtering higher hamonic wave after filtering again.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make a variety of changes.
Claims (6)
1. voltage transformer (VT) excitation characteristic test instrument control device, it is characterized in that: comprising: control panel (1), central data treatment circuit (2), driving circuit (3), power circuit and electric current and voltage sample circuit, described control panel (1) is connected with central data treatment circuit (2), described central data treatment circuit (2) is connected with electric current and voltage sample circuit with driving circuit (3) respectively, described power circuit is connected with electric current and voltage sample circuit with driving circuit (3) respectively, the output terminal of described power circuit is connected with the secondary terminals of voltage transformer (VT) (4).
2. voltage transformer (VT) excitation characteristic test instrument control device according to claim 1, it is characterized in that: described power circuit comprises: rectifier bridge (5), electric capacity of voltage regulation C1, IGBT inverter (6) and filtering circuit, described filtering circuit comprises filter inductance L1 and filter capacitor C2;
The ac input end of described rectifier bridge (5) connects 220V AC power, the DC output end of rectifier bridge (5) and meet electric capacity of voltage regulation C1 after be connected with the input end of above-mentioned IGBT inverter (6), after an output terminal serial connection filter inductance L1 of described IGBT inverter (6), be connected with one end of filter capacitor C2, another output terminal of IGBT inverter (6) is connected with the other end of filter capacitor C2, and the output terminal that the two ends of filter capacitor C2 are power circuit is connected with the secondary terminals of above-mentioned voltage transformer (VT) (4).
3. voltage transformer (VT) excitation characteristic test instrument control device according to claim 2, is characterized in that: described electric current and voltage sample circuit comprises two voltage hall sensors and a current Hall sensor;
Described the first voltage hall sensor (7) is attempted by the two ends of electric capacity of voltage regulation C1, described second voltage Hall element (8) is attempted by the two ends of filter capacitor C2, described current Hall sensor (9) is serially connected on the line between filter capacitor C2 and voltage transformer (VT) (4), and the signal output part of above-mentioned voltage hall sensor and current Hall sensor is all connected with central data treatment circuit (2).
4. according to the voltage transformer (VT) excitation characteristic test instrument control device described in the arbitrary claim of claims 1 to 3, it is characterized in that: described central data treatment circuit (2) comprising: DSP control module (10), CPLD control module (11), crystal oscillating circuit module (12), electric current and voltage sampling conditioning circuit module (13), open into/output module (14) and power module (15), described DSP control module (10) respectively with above-mentioned CPLD control module (11), crystal oscillating circuit module (12), electric current and voltage sampling conditioning circuit module (13) with open into/output module (14) to be connected, described power module (15) is whole central data treatment circuit (2) power supply,
Described DSP control module (10) is connected with above-mentioned control panel (1), and described CPLD control module (11) is connected with above-mentioned driving circuit (3), and described electric current and voltage sampling conditioning circuit module (13) is connected with above-mentioned electric current and voltage sample circuit.
5. voltage transformer (VT) excitation characteristic test instrument control device according to claim 4, is characterized in that: described driving circuit (3) adopts the driving chip that model is 2SD315A.
6. voltage transformer (VT) excitation characteristic test instrument control device according to claim 4, is characterized in that: described DSP control module (10) adopts the floating type DSP circuit unit that model is TMS320F28335.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806560.7U CN203606657U (en) | 2013-12-10 | 2013-12-10 | Controller for voltage-transformer excitation characteristic tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806560.7U CN203606657U (en) | 2013-12-10 | 2013-12-10 | Controller for voltage-transformer excitation characteristic tester |
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| CN203606657U true CN203606657U (en) | 2014-05-21 |
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| CN201320806560.7U Expired - Fee Related CN203606657U (en) | 2013-12-10 | 2013-12-10 | Controller for voltage-transformer excitation characteristic tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236895A (en) * | 2014-10-17 | 2014-12-24 | 国家电网公司 | Mechanical characteristic detection circuit of high-voltage circuit breaker |
| CN105467239A (en) * | 2015-11-30 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | Voltage transformer excitation characteristic test system |
| CN105699731A (en) * | 2015-11-16 | 2016-06-22 | 王爱玲 | Electronic voltage transformer |
| WO2018214347A1 (en) * | 2017-05-23 | 2018-11-29 | 江苏现代电力科技股份有限公司 | Power electronic reactor performance testing device |
-
2013
- 2013-12-10 CN CN201320806560.7U patent/CN203606657U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236895A (en) * | 2014-10-17 | 2014-12-24 | 国家电网公司 | Mechanical characteristic detection circuit of high-voltage circuit breaker |
| CN105699731A (en) * | 2015-11-16 | 2016-06-22 | 王爱玲 | Electronic voltage transformer |
| CN105467239A (en) * | 2015-11-30 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | Voltage transformer excitation characteristic test system |
| WO2018214347A1 (en) * | 2017-05-23 | 2018-11-29 | 江苏现代电力科技股份有限公司 | Power electronic reactor performance testing device |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20181210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |