CN201408231Y - Zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply - Google Patents
Zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply Download PDFInfo
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- CN201408231Y CN201408231Y CN200920085690XU CN200920085690U CN201408231Y CN 201408231 Y CN201408231 Y CN 201408231Y CN 200920085690X U CN200920085690X U CN 200920085690XU CN 200920085690 U CN200920085690 U CN 200920085690U CN 201408231 Y CN201408231 Y CN 201408231Y
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Abstract
The utility model relates to a zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply which comprises a control circuit module, a pulse width modulation generator, a Metal-Oxide-Semiconductor Field-Effect Transistor driver and power tube, a high-frequency transformer, a protection circuit and a voltage-multiplying rectifier circuit, wherein the low-voltage output end of the high-frequency transformer is connected with a sampling resistor, a current measuring terminal and a current feedback circuit, the output end of the voltage-multiplying rectifiercircuit is connected with a voltage divider, a current measuring terminal and a current feedback circuit, the control circuit module is equipped with a constant voltage control circuit, a constant current control circuit and a cascade constant voltage / constant current alternation switch, the signals of the feedback circuits which are compared with the setting signal values are inputted into an error amplifier of a constant current control module and then enter into a closed-cycle control system for guaranteeing the reliability of output signals. The zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply with stable performance can reliably work in the two modes of constant voltage and constant current, the protection circuit is internally arranged, thereby guaranteeing the working safety of power supply.
Description
Technical field
The utility model relates to a kind of high-voltage power supply, high voltage power supply for direct current characteristics test of zinc oxide arrester specifically.
Background technology
Power supply facilities test industry is to the Zinc-Oxide Arrester testing experiment, usually adopt control box control multiplication of voltage tube, form high pressure generator, produce adjustable high-tension electricity and be added in the Zinc-Oxide Arrester two ends, the high pressure generator that adopts this device brings very big inconvenience owing to wiring complexity, quality are heavy, bulky to test.In the Zinc-Oxide Arrester testing experiment, need the reference voltage U of test Zinc-Oxide Arrester under the 1mA leakage current
1mA, often need to obtain U gradually by manually regulating output voltage repeatedly and monitoring output current value
1mA, operating process is loaded down with trivial details, and test error is big, and this process also can be come semi-automatic finishing by microprocessor, but overshoot occurs easily, and output is difficult for stable, even danger out of control is arranged.
The utility model content
The utility model purpose is to overcome and exists complex operation, output signal instability, test error to provide a kind of energy fully automatic working in constant voltage, two kinds of patterns of constant current greatly in the above-mentioned Zinc-Oxide Arrester testing experiment, and the high voltage power supply for direct current characteristics test of zinc oxide arrester of can sample high tension voltage and electric current.
The purpose of this utility model realizes by following measure:
High voltage power supply for direct current characteristics test of zinc oxide arrester comprises control circuit module, PWM generator, mosfet driver and power tube, high-frequency transformer, holding circuit, it is characterized in that: also comprise voltage doubling rectifing circuit; Its control circuit module comprises the constant voltage/constant current switch of constant-voltage control circuit and constant-current control circuit and cascade.
Current measurement terminal and current feedback circuit that described high-frequency transformer output low pressure end is connected to sample resistance and draws; Voltage measurement terminal and voltage feedback circuit that the voltage doubling rectifing circuit output terminal is connected to voltage divider and draws.
Constant-current control circuit is provided with error amplifier and current reference is provided with circuit, and the inverting input of error amplifier connects the current feedback circuit output terminal, and its in-phase input end connects current reference circuit is set.
Constant-voltage control circuit is provided with error amplifier and voltage reference is provided with circuit, the inverting input of error amplifier connects the voltage feedback circuit output terminal, its in-phase input end connects voltage reference circuit is set, and the output terminal of error amplifier and error amplifier also connects constant voltage/constant current switch input end.
Described current feedback circuit is a voltage follower, and its input signal is the output terminal of sample resistance.
Described voltage feedback circuit is a voltage follower, and its input signal is the voltage division signal of the output voltage of voltage doubling rectifing circuit through voltage divider.
Compared with prior art, the beneficial effects of the utility model are:
1, the control circuit module of voltage doubling rectifing circuit has constant-current control circuit and constant-voltage control circuit, and the constant voltage/constant current switch of cascade, control circuit module is according to the calculated signals analysis that receives and select the constant voltage/constant current switch, thereby select circuit working at constant current mode or constant voltage mode, make high-voltage power supply have the function of stable constant current output and constant voltage output;
2, the output voltage of voltage multiplying rectifier module through series impedance device dividing potential drop, is input to voltage feedback circuit, and as the anti-phase input of error amplifier, its closed-loop control system guarantees to export constant voltage signal stabilization, reliable operation;
3, string has sample resistance between the output terminal of high-frequency transformer and the earth terminal, and the voltage signal of collection is converted to current value and is input to current feedback circuit, and as the anti-phase input of error amplifier, it is stable, reliable that its closed-loop control system guarantees to export constant current signal;
4, described voltage feedback circuit and current feedback circuit adopt voltage follower, and feedback signal is accurate;
5, be provided with holding circuit in the circuit, can limit excess current effectively, realize overcurrent protection, guarantee the safety of power supply.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is the voltage doubling rectifing circuit synoptic diagram;
Fig. 3 is the utility model closed-loop control system block scheme;
Fig. 4 is a closed-loop control system sampling synoptic diagram;
1-is an error amplifier among the figure, 2-high-frequency transformer, 10-current control module, 11-voltage control module, 12-constant voltage/constant current switch, 101-error amplifier, 103-error amplifier, 21-sample resistance, the 31-voltage divider, 32-voltage follower, 33-voltage follower.
Embodiment
Describe embodiment in detail below in conjunction with accompanying drawing: as shown in fig. 1, high voltage power supply for direct current characteristics test of zinc oxide arrester comprises control circuit module 1, PWM generator, mosfet driver and power tube, high-frequency transformer 2, holding circuit, voltage doubling rectifing circuit.
Referring to Fig. 1, in the utility model schematic block circuit diagram, high-frequency transformer 2 output low pressure ends are gone here and there sample resistance 21, current measurement terminal and current feedback circuit between earth terminal, the current measurement terminal is measured voltage swing on the sample resistance, be converted into current value, enter control circuit module 1 through feedback circuit.
Be connected to voltage divider 31 at the voltage doubling rectifing circuit output terminal, can adopt the mode dividing potential drop of serial resistance among the embodiment, can also pass through the polyphone capacitance partial pressure, and the dividing potential drop mode of other voltage dividers commonly used.Voltage divider 31 lead-in wires connect voltage measurement terminal and voltage feedback circuit, and the voltage measurement terminal is measured the voltage divider partial pressure value and entered control circuit module 1 through feedback circuit.
Its control circuit module 1 comprises the constant voltage/constant current switch 12 of constant-voltage control circuit 10 and constant-current control circuit 11 and cascade.
Constant-voltage control circuit 10 comprises setting voltage circuit, voltage feedback circuit and error amplifier 101, the input end in the same way of the magnitude of voltage put-into error amplifier 101 that the setting voltage circuit is provided with, the voltage signal of voltage feedback circuit feedback comes from the voltage division signal of voltage doubling rectifing circuit output terminal voltage divider 31, the reverse input end of put-into error amplifier.
Constant-current control circuit 11 comprises sets current circuit, current feedback circuit and error amplifier 102, set the input end in the same way of the current value put-into error amplifier 101 of current circuit setting, the voltage signal that the feedback current signal of current feedback circuit comes from the sample resistance that high-frequency transformer low pressure outgoing side and earth terminal transmit between referring to changes into current signal, the reverse input end of put-into error amplifier.
Control circuit module is according to the calculated signals analysis that receives and select the constant voltage/constant current switch, zero load is boosted and is the constant voltage pressure limiting automatically, excessive or the short circuit of load is the constant current current limliting automatically, thereby select circuit working at constant current mode or constant voltage mode, make high-voltage power supply have the function of constant current output and constant voltage output, because the feedback circuit of output terminal is as the comparison signal of input end error amplifier, guarantee that high-voltage power supply output constant current/constant voltage signal keeps stable, accurate under the effect of control circuit, have good stablizing effect.
String has holding circuit between high-frequency transformer and PWM generator, when guaranteeing that input end is short-circuited fault, plays overcurrent protection, guarantees that circuit working is at safe condition.
As shown in Figure 2, make the voltage doubling rectifing circuit synoptic diagram of the utility model high voltage power supply for direct current characteristics test of zinc oxide arrester, DC voltage after the rectification is sent into the feedback end of control module through the voltage divider sampling, control module is under the acting in conjunction of initialization circuit and feedback signal, output one direct current signal is given the PWM generator control end after error amplifier amplifies, and realizes the stable regulation of VD.Circuit structure is simple, has reduced the influence of undesired signal to control circuit.
Figure 3 shows that the closed-loop control system block scheme of the utility model high voltage power supply for direct current characteristics test of zinc oxide arrester, default electric current and voltage value and system's output feedback signal are relatively, by the error amplifier amplifying signal, the dutycycle that pwm circuit is adjusted switching tube changes the rectification output signal, finally make output voltage stabilization in the value of setting, reach constant current output.
The systematic sampling synoptic diagram as shown in Figure 4, r among the figure (t) is the setting signal value, e (t) is an error amplifier output signal, becomes discrete signal e after sampling thief Ts sampling
*(t), discrete signal e
*(t) feed back the inverting input that enters error amplifier through open loop pulsed transfer function G (s) output signal y (t) and relatively amplify, guarantee the stability of system.
Because the utility model high voltage power supply for direct current characteristics test of zinc oxide arrester adopts closed-loop control, has realized the automatic control and the adjusting of output signal, has improved the technical indicators such as stability, ripple voltage and reliability of power supply.
Facts have proved, in the direct current characteristics test of zinc oxide arrester device, use the utility model high-voltage power supply, the energy steady operation is in constant voltage, two kinds of patterns of constant current, and the reference voltage under can sample Leakage Current of Zinc-oxide Lightning Arresters and the leakage current, efficiently solve and when doing the Zinc-Oxide Arrester testing experiment, have inconvenient power taking source problem in the past, reduce the workload in the operation in the test in the past, avoided complex operation, output signal instability, test error big.
Claims (6)
1, high voltage power supply for direct current characteristics test of zinc oxide arrester comprises control circuit module (1), PWM generator, mosfet driver and power tube, high-frequency transformer (2), holding circuit, it is characterized in that: also comprise voltage doubling rectifing circuit; Its control circuit module (1) comprises the constant voltage/constant current switch (12) of constant-voltage control circuit (10) and constant-current control circuit (11) and cascade.
2, high voltage power supply for direct current characteristics test of zinc oxide arrester according to claim 1 is characterized in that: current measurement terminal and current feedback circuit that high-frequency transformer (2) output low pressure end is connected to sample resistance (21) and draws; Voltage measurement terminal and voltage feedback circuit that the voltage doubling rectifing circuit output terminal is connected to voltage divider and draws.
3, high voltage power supply for direct current characteristics test of zinc oxide arrester according to claim 1, it is characterized in that: constant-current control circuit (10) is provided with error amplifier (101) and current reference is provided with circuit (102), the inverting input of error amplifier (101) connects the current feedback circuit output terminal, and its in-phase input end connects current reference circuit (102) is set.
4, high voltage power supply for direct current characteristics test of zinc oxide arrester according to claim 1, it is characterized in that: constant-voltage control circuit (11) is provided with error amplifier (103) and voltage reference is provided with circuit (104), the inverting input of error amplifier (103) connects the voltage feedback circuit output terminal, its in-phase input end connects voltage reference circuit (104) is set, and the output terminal of error amplifier (101) and error amplifier (103) also connects constant voltage/constant current switch (12) input end.
5, according to claim 1 or 3 described high voltage power supply for direct current characteristics test of zinc oxide arrester, it is characterized in that: current feedback circuit is voltage follower (32), and its input signal is the output terminal of sample resistance (21).
6, according to claim 1 or 4 described high voltage power supply for direct current characteristics test of zinc oxide arrester, it is characterized in that: voltage feedback circuit is voltage follower (33), and its input signal is that the output voltage of voltage doubling rectifing circuit is through voltage divider (31) voltage division signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920085690XU CN201408231Y (en) | 2009-05-13 | 2009-05-13 | Zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920085690XU CN201408231Y (en) | 2009-05-13 | 2009-05-13 | Zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply |
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| CN201408231Y true CN201408231Y (en) | 2010-02-17 |
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| CN200920085690XU Expired - Lifetime CN201408231Y (en) | 2009-05-13 | 2009-05-13 | Zinc oxide lightning arrester direct current characteristic experimental high-voltage power supply |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887073B (en) * | 2009-05-13 | 2012-07-25 | 武汉特试特电气有限公司 | High voltage power supply for direct current characteristics test of zinc oxide arrester |
| CN103792446A (en) * | 2014-01-17 | 2014-05-14 | 宁波大学 | Method for simulating discharge performance of battery and battery simulator applying same |
| CN105911391A (en) * | 2016-04-28 | 2016-08-31 | 中国铁建电气化局集团第工程有限公司 | RPLDECT rail potential limiting apparatus electrical apparatus characteristics tester |
| CN107345978A (en) * | 2017-06-23 | 2017-11-14 | 沈阳工程学院 | The packaged type of power plant or intelligent substation controls power supply and control method |
| CN107579662A (en) * | 2017-10-25 | 2018-01-12 | 吉林大学 | A kind of double-plasma ion source discharge power supply |
| CN107703391A (en) * | 2017-10-17 | 2018-02-16 | 云南电网有限责任公司电力科学研究院 | A kind of secondary circuit detecting system of transformer station |
-
2009
- 2009-05-13 CN CN200920085690XU patent/CN201408231Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887073B (en) * | 2009-05-13 | 2012-07-25 | 武汉特试特电气有限公司 | High voltage power supply for direct current characteristics test of zinc oxide arrester |
| CN103792446A (en) * | 2014-01-17 | 2014-05-14 | 宁波大学 | Method for simulating discharge performance of battery and battery simulator applying same |
| CN103792446B (en) * | 2014-01-17 | 2016-04-27 | 宁波大学 | A kind of method of simulated battery discharge performance and realize the battery simulator of the method |
| CN105911391A (en) * | 2016-04-28 | 2016-08-31 | 中国铁建电气化局集团第工程有限公司 | RPLDECT rail potential limiting apparatus electrical apparatus characteristics tester |
| CN105911391B (en) * | 2016-04-28 | 2018-09-14 | 中国铁建电气化局集团第一工程有限公司 | A kind of RPLDECT rails potential limiting device opering characteristic of electric apparatus tester |
| CN107345978A (en) * | 2017-06-23 | 2017-11-14 | 沈阳工程学院 | The packaged type of power plant or intelligent substation controls power supply and control method |
| CN107345978B (en) * | 2017-06-23 | 2023-07-04 | 沈阳工程学院 | Movable control power supply for power plant or intelligent substation and control method |
| CN107703391A (en) * | 2017-10-17 | 2018-02-16 | 云南电网有限责任公司电力科学研究院 | A kind of secondary circuit detecting system of transformer station |
| CN107579662A (en) * | 2017-10-25 | 2018-01-12 | 吉林大学 | A kind of double-plasma ion source discharge power supply |
| CN107579662B (en) * | 2017-10-25 | 2024-04-09 | 吉林大学 | Double-plasma ion source discharge power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100217 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Wuhan Testyle Electric Co., Ltd. Document name: Notification of Expiration of Patent Right Duration |