CN113839446A - Intelligent capacitor pulse discharging device - Google Patents
Intelligent capacitor pulse discharging device Download PDFInfo
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- CN113839446A CN113839446A CN202111214949.8A CN202111214949A CN113839446A CN 113839446 A CN113839446 A CN 113839446A CN 202111214949 A CN202111214949 A CN 202111214949A CN 113839446 A CN113839446 A CN 113839446A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates to the technical field of direct current quick breakers, in particular to an intelligent capacitor pulse discharging device which comprises a charging unit, a sampling unit, a capacitor, a control unit and a trigger switch for controlling the capacitor to discharge; the charging unit, the sampling unit and the capacitor are sequentially connected in parallel, and the charging unit is connected to an external power supply and is used for converting the output of the external power supply into direct current and outputting the direct current to the capacitor for charging; the sampling unit detects the voltage value output to the capacitor by the charging unit and the charging amount of the capacitor, and feeds back the detection result to the control unit; the control unit is used for receiving an external trigger signal input from the outside and controlling the on and off of the trigger switch according to the external trigger signal so as to enable the capacitor to be switched on and discharged when the trigger switch is switched on. The device does not need to be additionally provided with a capacitor charging device, can realize forward pulse discharge and reverse pulse discharge of the capacitor, and has the function of detecting the external load connection condition.
Description
Technical Field
The invention relates to the technical field of direct current quick breakers, in particular to an intelligent capacitor pulse discharging device.
Background
The direct current quick circuit breaker is key equipment for safe operation and protection of a direct current network, and the performance of the direct current quick circuit breaker is very key to formulation of a system protection strategy and engineering realization. In recent years, with the continuous development of technology, a hybrid direct current vacuum circuit breaker based on a forced commutation principle is widely applied to the fields of a long-distance direct current high-voltage power transmission system, a distributed direct current power grid, a rail transit traction power supply system and the like due to the advantages of strong through-current capacity and high breaking capacity. The mixed DC vacuum circuit breaker consists of a normal through-current branch and a forced commutation shutoff branch consisting of a capacitance pulse discharge device. The capacitor pulse discharging device directly determines whether the hybrid direct current vacuum circuit breaker is successfully switched on or off, and is a key device of the direct current vacuum circuit breaker.
Most of capacitor pulse discharge devices in the prior art have the defects of complex structure, large volume, low reliability, additional configuration of a charging device, incapability of realizing forward pulse discharge and reverse pulse discharge and the like.
For example, patent application publication No. CN112865275A discloses a super capacitor discharging device, which includes a main control unit for controlling discharge of a super capacitor, a voltage detection unit for detecting voltage of the super capacitor, a current detection unit for detecting discharge current of the super capacitor, an inverter unit for controlling on/off of a discharge loop of the super capacitor and selection of the discharge loop, and a motor unit for discharging energy of the super capacitor. The super capacitor discharging device needs to be additionally provided with a capacitor charging device, and the defects of forward pulse discharging and reverse pulse discharging of the capacitor cannot be realized.
For another example, a capacitor discharge circuit and a power conversion circuit disclosed in patent application publication No. CN113037068A include a main discharge circuit and a residual voltage discharge circuit, where the main discharge circuit and the residual voltage discharge circuit are respectively connected between a positive electrode of a bus capacitor and a negative electrode of the bus capacitor, and the main discharge circuit is connected to the residual voltage discharge circuit, and the main discharge circuit controls the residual voltage discharge circuit to be in a conducting state and to discharge a voltage of the bus capacitor when the main discharge circuit does not receive a turn-off signal and a voltage of the capacitor is less than a voltage threshold. The capacitor discharge circuit also needs to be additionally provided with a capacitor charging device, and also has the defects that the forward pulse discharge and the reverse pulse discharge of the capacitor cannot be realized, and in addition, the capacitor discharge circuit cannot detect the external load connection condition.
Therefore, there is a need for a capacitive pulse discharging device, which can realize the forward pulse discharging and reverse pulse discharging of the capacitor without additionally configuring a capacitive charging device, and has a function of detecting the external load connection condition.
Disclosure of Invention
Solves the technical problem
In view of the above-mentioned disadvantages of the prior art, the present invention provides an intelligent capacitor pulse discharging device, which can realize the forward pulse discharging and the reverse pulse discharging of a capacitor without additionally configuring a capacitor charging device, and has a function of detecting the external load connection condition.
Technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides an intelligent capacitor pulse discharge device, which comprises a charging unit, a sampling unit, a capacitor, a control unit and a trigger switch for controlling the discharge of the capacitor;
the charging unit, the sampling unit and the capacitor are sequentially connected in parallel, and the charging unit is connected to an external power supply and is used for converting the output of the external power supply into direct current and outputting the direct current to the capacitor for charging; the sampling unit detects the voltage value output to the capacitor by the charging unit and the charging amount of the capacitor, and feeds back the detection result to the control unit; the control unit is used for receiving an external trigger signal input from the outside and controlling the on and off of the trigger switch according to the external trigger signal so as to enable the capacitor to be switched on and discharged when the trigger switch is switched on.
Further, the external trigger signal includes a forward trigger signal and a reverse trigger signal, the control unit controls the trigger switch through the trigger unit, when the control unit receives the forward trigger signal, the trigger unit controls the trigger switch to be turned on according to a first mode to enable the capacitor to discharge forward pulses, the control unit receives the reverse trigger signal, and the trigger unit controls the trigger switch to be turned on according to a second mode to enable the capacitor to discharge reverse pulses.
Further, the trigger switch comprises a first trigger switch, a second trigger switch, a third trigger switch and a fourth trigger switch; the first mode is conducted, the first trigger switch and the fourth trigger switch are conducted, and the second trigger switch and the third trigger switch are turned off; the second mode is turned on, the second trigger switch and the third trigger switch are turned on, and the first trigger switch and the fourth trigger switch are turned off.
The detection unit is used for detecting whether the load communicated with the capacitor is connected and normal or not, and if the load is connected and normal, a load connected signal is output; the ready judging element is used for sending a ready signal to the outside when receiving the load connected signal and the charging completion signal at the same time, and the charging completion signal is sent to the ready judging element by the control unit.
Further, the intelligent capacitor pulse discharging device further comprises a residual voltage discharging circuit, and the residual voltage discharging circuit is used for releasing energy stored by the capacitor when the intelligent capacitor pulse discharging device is in fault or stops working.
Further, the residual voltage discharging loop comprises a residual voltage discharging resistor and a residual voltage discharging switch which are connected in series, the control unit is used for controlling the on and off of the residual voltage discharging switch, if the residual voltage discharging switch is on, the capacitor discharges to the residual voltage discharging resistor, and if the residual voltage discharging switch is off, the capacitor does not discharge to the residual voltage discharging resistor.
Further, the residual voltage release switch is a normally closed contactor.
Furthermore, a voltage regulating element is further arranged on the control unit, and the control unit determines the output voltage value of the charging unit according to a regulating value set on the voltage regulating element; and the capacitor is also connected with a follow current element in parallel, and the follow current element is used for preventing overvoltage from occurring in the discharging process of the capacitor.
Further, the freewheeling element is a freewheeling diode or a varistor.
Further, the trigger switch is a thyristor element or an IGBT/IGCT element.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects: the intelligent capacitor pulse discharge device has the advantages of compact size, safety and reliability, and can realize the forward pulse discharge and reverse pulse discharge of the capacitor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram of an intelligent capacitor pulse discharge device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another intelligent capacitor pulse discharging apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an intelligent capacitor pulse discharging apparatus according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of another intelligent capacitor pulse discharging apparatus according to the second embodiment of the present invention;
wherein the reference numerals are as follows:
1-a power supply input end, 2-a charging unit, 3-a sampling unit, 4-a residual voltage discharge resistor, 5-a residual voltage discharge switch, 6-a trigger switch, 61-a first trigger switch, 62-a second trigger switch, 63-a third trigger switch, 64-a fourth trigger switch, 10-a capacitor, 11-a detection unit, 12-a follow current element, 13-a power supply output end, 14-a ready signal, 15-a charging voltage signal, 16-a ready judgment element, 17-a trigger unit, 18-a control unit, 19-a voltage regulation element, 20-an external trigger signal, 21-a forward trigger signal and 22-a reverse trigger signal.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 and 2, the present invention provides an intelligent capacitor pulse discharging apparatus, which includes a charging unit 2, a sampling unit 3, a capacitor 10, a control unit 18, and a trigger switch 6 for controlling the discharging of the capacitor 10; the charging unit 2, the sampling unit 3 and the capacitor 10 are sequentially connected in parallel, and the charging unit 2 is connected with an external power supply and used for converting the output of the external power supply into direct current and outputting the direct current to the capacitor 10 for charging; the sampling unit 3 detects the voltage value output to the capacitor 10 by the charging unit 2 and the charging amount of the capacitor 10, and feeds back the detection result to the control unit 18; the control unit 10 can determine the charging condition of the capacitor 10 according to the voltage value and the charging amount, and can output a determination result, the operator can determine whether to input an external trigger signal to the control unit 18 according to the determination result, the control unit 18 receives the external trigger signal input from the outside, and controls the on and off of the trigger switch 6 according to the external trigger signal, so that the capacitor 10 is switched on and discharged when the trigger switch 6 is switched on, and the capacitor 10 can be connected with a load and discharged to the switched-in load.
In this embodiment, the intelligent capacitor pulse discharging device further includes a residual voltage discharging circuit, the residual voltage discharging circuit is connected in parallel to two ends of the capacitor 10, and when the intelligent capacitor pulse discharging device fails or does not work, the energy stored in the capacitor 10 can be released, so as to ensure safety. Referring to fig. 1 and 2, the residual voltage discharging circuit generally includes a residual voltage discharging resistor 4 and a residual voltage discharging switch 5 connected in series, and the control unit 18 is configured to control the residual voltage discharging switch 5 to be turned on and off, and if turned on, the capacitor 10 discharges to the residual voltage discharging resistor 4, and if turned off, the capacitor 10 does not discharge to the residual voltage discharging resistor 4.
In this embodiment, the capacitor 10 can be discharged by turning on the trigger switch 6, and the discharge output side of the capacitor 10 is further provided with a detection unit 11 for detecting whether the external load on the power output end 13 is connected and whether the load is normal. Two output ends of the power supply output end 13 are connected in parallel with a follow current element 12 for preventing overvoltage in the discharging process of the capacitor. The control unit 18 can receive an external trigger signal 20, and controls the trigger switch 6 to be turned on and off through the trigger unit 17 according to the external trigger signal 20. The control unit 18 is provided with a voltage adjusting element 19 for changing the output voltage value of the charging unit 2 according to the adjustment value, measuring the output voltage value of the charging unit 2 through the sampling unit 3, and outputting a charging voltage signal 15 to the outside, wherein the charging voltage signal 15 reflects the output voltage value, i.e., the charging voltage of the capacitor 10. After the capacitor 10 is charged, the control unit 18 outputs a charge completion signal, which is connected in parallel with the load connected signal output from the detection unit 11, and sends a ready signal 14 to the outside through the ready determination element 16. That is, the readiness determination element 16 receives the charging completion signal and the load connected signal at the same time, and sends the readiness signal 14 to the outside.
In the implementation, the charging process and the discharging process are controlled by the control unit 18.
The charging process is as follows:
as shown in fig. 1, when the intelligent capacitor pulse discharging device starts to work, the control unit 18 controls the residual voltage discharging circuit to be turned off, and the capacitor 10 can be normally charged without being put into operation. The control unit 18 controls the charging unit 2 to charge the capacitor 10, and measures the voltage value at two ends of the capacitor 10 through the sampling unit 3 to judge whether the charging of the capacitor 10 is completed. After the capacitor 10 is charged, the control unit 18 controls the charging unit 2 to stop charging, and waits for a pulse discharging command.
The discharge process is as follows:
as shown in fig. 1, when the control unit 18 receives a pulse discharge command from the external trigger signal 20, it sends an operation signal to the trigger unit 17, and the trigger unit 17 controls the trigger switch 6 to be turned on, so that the capacitor 10 starts to discharge. After the capacitor 10 discharges, the trigger switch 6 is turned off, the follow current element 12 and the external load form a follow current loop, and the circuit elements are protected from being damaged.
Furthermore, the control unit 18 is also used for fault detection:
as shown in fig. 1, when the control unit 18 detects an internal fault, the control unit 18 controls the residual voltage discharging circuit to discharge the energy stored in the capacitor 10, and discharge the residual voltage of the capacitor to ensure safety.
The intelligent capacitor pulse discharge device is internally integrated with a capacitor, a charging unit, a sampling unit, a residual voltage discharge circuit and an external load detection unit, can intelligently detect the connection condition of capacitor voltage and an external load, and has the advantages of compact size, safety and reliability.
In this embodiment, the residual voltage discharging circuit generally includes a residual voltage discharging resistor 4 and a residual voltage discharging switch 5 connected in series, and the control unit 18 is configured to control the on and off of the residual voltage discharging switch 5, and if on, the capacitor 10 discharges to the residual voltage discharging resistor 4, and if off, the capacitor 10 does not discharge to the residual voltage discharging resistor 4.
In the present embodiment, when the control unit 18 fails or the external power source of the capacitive pulse discharge device loses power, the residual voltage discharge switch 5 may be set as a normally closed contactor to ensure the safety of the device. Referring to fig. 1 and 2, when the control unit 18 fails or the external power supply of the capacitor pulse discharging device loses power, because the residual voltage discharging switch 5 is a normally closed switch, the residual voltage discharging loop formed by the residual voltage discharging switch 5 and the residual voltage discharging resistor 4 automatically releases the energy stored in the capacitor 10, discharges the capacitor residual voltage, and ensures the safety of the device.
In this embodiment, referring to fig. 2, the freewheeling element 12 may be a freewheeling diode, which is sometimes called a freewheeling diode, and is a diode used in conjunction with an inductive load, when the current of the inductive load changes suddenly or decreases, an abrupt voltage may be generated at two ends of the inductor, which may damage other elements, and when the freewheeling diode is used, the current may change more gradually, which avoids the occurrence of an abrupt voltage, and is a common component for placing overvoltage.
Example two
Referring to fig. 3 and 4, the present embodiment provides an intelligent capacitor pulse discharging apparatus, different from the above, the external trigger signal 20 input by the control unit 18 includes a forward trigger signal 21 and a reverse trigger signal 22, if the control unit 18 receives the forward trigger signal 21, the capacitor 10 discharges in a forward pulse manner, and if the control unit 18 receives the reverse trigger signal 22, the capacitor 10 discharges in a reverse pulse manner. By dividing the external trigger signal 20 into the forward trigger signal 21 and the reverse trigger signal 22, different discharge requirements of the capacitor 10 are realized, and the characteristic that the device can perform forward pulse discharge and reverse pulse discharge of the capacitor is realized.
In the present embodiment, in order to distinguish between the forward pulse discharge and the reverse pulse discharge of the capacitor 10, the arrangement of the trigger switch 6 is generally implemented, and referring to fig. 3, for example, the trigger switch 6 may be arranged to include a first trigger switch 61, a second trigger switch 62, a third trigger switch 63, and a fourth trigger switch 64; if the first trigger switch 61 and the fourth trigger switch 64 are turned on, the second trigger switch 62 and the third trigger switch 63 are turned off, and the capacitor 10 discharges in a positive pulse mode; if the second trigger switch 62 and the third trigger switch 63 are turned on, the first trigger switch 61 and the fourth trigger switch 64 are turned off, and the capacitor 10 is reversely pulse-discharged.
In the present embodiment, the trigger switch 6 is a thyristor element or an IGBT/IGCT element. The thyristor element has the advantages of small volume, high efficiency, long service life and the like. In an automatic control system, the device can be used as a high-power driving device to realize the control of high-power equipment by using a low-power control. It is widely applied to speed regulating systems, power regulating systems and follow-up systems of alternating current and direct current motors. The IGCT element has the characteristics of large current, high voltage of resistance and disconnection, high switching frequency, high reliability, compact structure, low conduction loss and the like. The IGBT integrates the advantages of GTR and MOSFET devices, and has the characteristics of small driving power, low saturation voltage, high current-carrying density and the like.
In this embodiment, the charging unit 2 charges the capacitor 10 in a constant voltage manner or a constant current manner, so as to ensure the charging stability and the stability of acquiring the charging signal.
In the present embodiment, the charging unit 2 generally has an isolation function to isolate the charging power supply from the discharging circuit, so as to avoid interference between the charging power supply and the discharging circuit.
In this embodiment, referring to fig. 4, the freewheeling element 12 is a voltage dependent resistor, which is a resistor device with nonlinear current-voltage characteristics and is mainly used for voltage clamping when the circuit is subjected to overvoltage, and absorbing excess current to protect the sensitive device. The varistor has the impact resistance characteristic that the varistor can bear specified impact current, impact energy and average power when multiple impacts occur successively; and the service life characteristics comprise continuous working voltage service life, namely that the voltage dependent resistor can reliably work for a specified time under specified environmental temperature and system voltage conditions, and impact service life, namely that the voltage dependent resistor can reliably bear specified impact times.
The invention has the advantages that the intelligent capacitor pulse discharging device is provided, the capacitor, the charging unit, the sampling unit, the residual voltage discharge circuit and the external load detection unit are integrated in the intelligent capacitor pulse discharging device, the connection condition of the capacitor voltage and the external load can be intelligently detected, the intelligent capacitor pulse discharging device has the advantages of compact size, safety and reliability, and the device can realize the characteristics of forward pulse discharging and reverse pulse discharging of the capacitor.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An intelligent capacitor pulse discharging device is characterized by comprising a charging unit, a sampling unit, a capacitor, a control unit and a trigger switch for controlling the capacitor to discharge;
the charging unit, the sampling unit and the capacitor are sequentially connected in parallel, and the charging unit is connected to an external power supply and is used for converting the output of the external power supply into direct current and outputting the direct current to the capacitor for charging; the sampling unit detects the voltage value output to the capacitor by the charging unit and the charging amount of the capacitor, and feeds back the detection result to the control unit; the control unit is used for receiving an external trigger signal input from the outside and controlling the on and off of the trigger switch according to the external trigger signal so as to enable the capacitor to be switched on and discharged when the trigger switch is switched on.
2. The intelligent capacitor pulse discharge device according to claim 1, wherein the external trigger signal includes a forward trigger signal and a reverse trigger signal, the control unit controls the trigger switch through a trigger unit, when the control unit receives the forward trigger signal, the trigger unit controls the trigger switch to be turned on in a first manner to discharge the capacitor forward pulse, the control unit receives the reverse trigger signal, and the trigger unit controls the trigger switch to be turned on in a second manner to discharge the capacitor reverse pulse.
3. The intelligent capacitor pulse discharge device of claim 2, wherein the trigger switches comprise a first trigger switch, a second trigger switch, a third trigger switch, and a fourth trigger switch; the first mode is conducted, the first trigger switch and the fourth trigger switch are conducted, and the second trigger switch and the third trigger switch are turned off; the second mode is turned on, the second trigger switch and the third trigger switch are turned on, and the first trigger switch and the fourth trigger switch are turned off.
4. The intelligent capacitor pulse discharge device according to claim 1, further comprising a detection unit and a readiness determination element, wherein the detection unit is configured to detect whether a load connected to the capacitor is connected and normal, and if the load is connected and normal, output a load connected signal; the ready judging element is used for sending a ready signal to the outside when receiving the load connected signal and the charging completion signal at the same time, and the charging completion signal is sent to the ready judging element by the control unit.
5. The intelligent capacitor pulse discharge device of claim 1, further comprising a residual voltage bleed circuit for discharging energy stored by the capacitor when the intelligent capacitor pulse discharge device fails or ceases to operate.
6. The intelligent capacitor pulse discharge device according to claim 5, wherein the residual voltage discharging loop comprises a residual voltage discharging resistor and a residual voltage discharging switch connected in series, and the control unit is configured to control the residual voltage discharging switch to be turned on and off, if turned on, the capacitor discharges to the residual voltage discharging resistor, and if turned off, the capacitor does not discharge to the residual voltage discharging resistor.
7. The intelligent capacitor pulse discharge device of claim 6, wherein the residual voltage bleeder switch is a normally closed contactor.
8. The intelligent capacitor pulse discharge device according to claim 1, wherein a voltage regulating element is further disposed on the control unit, and the control unit determines the output voltage value of the charging unit according to a regulating value set on the voltage regulating element; and the capacitor is also connected with a follow current element in parallel, and the follow current element is used for preventing overvoltage from occurring in the discharging process of the capacitor.
9. The intelligent capacitor pulse discharge device of claim 8, wherein the freewheeling element is a freewheeling diode or a varistor.
10. The intelligent capacitor pulse discharge device according to any one of claims 1-9, wherein the trigger switch is a thyristor element or an IGBT/IGCT element.
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| CN202111214949.8A CN113839446A (en) | 2021-10-19 | 2021-10-19 | Intelligent capacitor pulse discharging device |
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| CN202111214949.8A CN113839446A (en) | 2021-10-19 | 2021-10-19 | Intelligent capacitor pulse discharging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114355143A (en) * | 2022-01-05 | 2022-04-15 | 中节能风力发电股份有限公司 | Energy discharge and inhibition device and method for IGBT characteristic test equipment |
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2021
- 2021-10-19 CN CN202111214949.8A patent/CN113839446A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114355143A (en) * | 2022-01-05 | 2022-04-15 | 中节能风力发电股份有限公司 | Energy discharge and inhibition device and method for IGBT characteristic test equipment |
| CN114355143B (en) * | 2022-01-05 | 2022-08-05 | 中节能风力发电股份有限公司 | Energy discharge and inhibition device and method for IGBT characteristic test equipment |
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