CN114006523B - Test discharging device and method for flexible direct current converter valve power module - Google Patents
Test discharging device and method for flexible direct current converter valve power module Download PDFInfo
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- CN114006523B CN114006523B CN202111140676.7A CN202111140676A CN114006523B CN 114006523 B CN114006523 B CN 114006523B CN 202111140676 A CN202111140676 A CN 202111140676A CN 114006523 B CN114006523 B CN 114006523B
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- 238000007599 discharging Methods 0.000 title claims abstract description 101
- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 claims description 27
- 238000007689 inspection Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to a test discharging device and a test discharging method for a flexible direct current converter valve power module. Furthermore, the power module is subjected to graded discharge by arranging the first discharge loop and the second discharge loop, so that the targeted differential discharge is realized, and the discharge operation can be performed in a manual or automatic mode. According to the technical scheme, the capacitor voltage of the power module is rapidly and safely discharged, and the safety performance of the flexible direct current converter valve is improved.
Description
Technical Field
The invention relates to the technical field of testing of flexible direct current converter valve power modules, in particular to a test discharging device and a test discharging method of a flexible direct current converter valve power module.
Background
The converter valve is the most core equipment of the flexible direct current transmission system, the power modules are basic units forming the flexible direct current converter valve, and each power module consists of a full-control device, a module capacitor, a bypass switch, a bypass thyristor, a voltage equalizing resistor and the like. The dc capacitance of the power module is the core element that supports and stabilizes the power module voltage, providing a voltage source. The capacitance value of the power module is larger, and the voltage of the power module is more than 1 kilovolt in the running process of the system, so that the capacitor stores larger electric quantity. The equalizing resistor provides a discharge channel for the submodule after the system is stopped, so that the converter valve is convenient to overhaul and maintain.
If the following problems occur, the electric quantity in the capacitor cannot be discharged cleanly, and the risk of personal electric shock is caused:
(1) When the lead wire of the equalizing resistor connected into the loop is damaged and the resistor cannot be connected at two ends of the direct-current capacitor in parallel, the capacitor voltage can hardly be discharged;
(2) When the module fault causes the generation of a black module or the module voltage is lower than the starting voltage of the energy-taking power supply, the valve control workstation does not display the state of the power module and the residual capacitor voltage any more;
(3) Because of the divergence of the electrical parameters of the capacitor, the energy-taking power supply and other devices, the energy discharged by each module is different, and the situation that part of the modules still carry more energy exists.
Therefore, before maintenance personnel carry out maintenance work, the capacitor voltage of the power module must be measured and discharged to prevent personal electric shock. In the prior art, no method for effectively performing test discharge on the capacitor voltage of the power module exists.
Disclosure of Invention
Based on the above situation in the prior art, the invention aims to provide a test discharging device and a test discharging method for a flexible direct current converter valve power module, which are applicable to power modules with various structural differences and have good compatibility; the battery is adopted for power supply, external power is not needed, and the portable device has good portability; the power module capacitor voltage discharge device has the voltage grading early warning function, and can realize rapid and safe discharge of the power module capacitor voltage through manual or automatic grading.
In order to achieve the above object, according to one aspect of the present invention, there is provided a test discharging device of a flexible dc converter valve power module, the device including a test portion and a discharge portion; wherein,
the electricity testing contact of the electricity testing part is connected with two ends of the direct current capacitor of the power module so as to collect and display the voltage of the power module;
the input terminal of the discharging part is connected with the discharging interface of the electricity testing part so as to perform discharging operation according to the voltage of the power module.
Further, the electricity testing part comprises a T-shaped insulating rod;
two ends of a T-shaped cross beam of the insulating rod are provided with two electricity testing contacts, and the tail part of the T-shaped longitudinal beam of the insulating rod is provided with an insulating handle.
Further, the insulating rod is a hollow insulating rod, and the inside of the insulating rod comprises a voltage acquisition module, an LCD display module and a first power supply module;
the voltage acquisition module is connected with the electricity inspection contact to acquire the voltage of the power module;
the LCD display module is connected with the output of the voltage acquisition module and is used for displaying the acquired voltage;
the first power supply module is connected with the LCD display module through a first switch and is used for supplying power to the LCD display module.
Further, the insulating rod is telescopic; the distance between the two electricity inspection contacts is adjustable.
Further, the discharging part comprises a discharging module and a discharging control module, wherein the input ends of the discharging module and the discharging control module are connected;
the discharging module comprises a first discharging loop and a second discharging loop;
the discharge control module comprises a second power supply module and a control module which are connected with each other.
Further, the first discharging loop comprises a first high-voltage relay and a first discharging resistor which are connected with each other; the second discharge loop comprises a second high-voltage relay and a second discharge resistor which are connected with each other.
Further, the control module comprises a first high-voltage relay coil and a third switch which are connected in series in the first control loop, a second high-voltage relay coil and a fourth switch which are connected in series in the second control loop, a first high-voltage relay coil and a fifth switch which are connected in series in the third control loop, and a second high-voltage relay coil and a sixth switch which are connected in series in the fourth control loop.
According to another aspect of the invention, there is provided a method of testing discharge of a flexible dc converter valve power module, the method employing an apparatus according to the first aspect of the invention for testing discharge, comprising the steps of:
s1, closing a first switch to obtain a capacitance voltage U of a power module;
s2, comparing the capacitor voltage U with the upper voltage threshold U H If U is greater than or equal to U H The third, fourth, fifth and sixth switches are turned off to prohibit the discharging part from discharging the power module, and the step S1 is returned; if U is less than U H Step S3 is executed;
s3, comparing the capacitor voltage U with the lower voltage threshold U L If U is smaller than U L Stopping discharging, and ending the method; if U is greater than or equal to U L Step S4 is executed;
s4, comparing the capacitor voltage with a first voltage threshold U 1 And a second voltage threshold U 2 The power module is discharged by selecting a discharge loop according to the comparison result;
s5, returning to the step S1.
Further, the selecting the discharging circuit to automatically discharge the power module according to the comparison result includes:
if U is greater than or equal to U 1 Closing the fifth switch and the first high-voltage relay to discharge through the first discharge loop, and returning to the step S1;
if U is 1 >U≥U 2 Opening the fifth switch, opening the first high-voltage relay, closing the sixth switch, closing the second high-voltage relay to discharge through the second discharge loop, and returning to the step S1;
if U is>U 2 And when the first high-voltage relay and the second high-voltage relay are connected in parallel, the fifth switch and the sixth switch are closed, the first high-voltage relay and the second high-voltage relay are discharged in parallel through the first discharging loop and the second discharging loop, and the step S1 is returned.
If U is greater than or equal to U 1 Manually closing the third switch, electrifying a coil of the first high-voltage relay to close the first high-voltage relay so as to discharge through the first discharge loop, and returning to the step S1;
if U is 1 >U≥U 2 The third switch is manually turned off and turned offClosing a fourth switch, electrifying a coil of the second high-voltage relay so as to open the first high-voltage relay, closing the second high-voltage relay, discharging through a second discharging loop, and returning to the step S1;
if U is less than U 2 And when the first high-voltage relay and the second high-voltage relay are closed by manually closing the third switch and the fourth switch, electrifying the coils of the first high-voltage relay and the second high-voltage relay so as to discharge in parallel through the first discharging loop and the second discharging loop, and returning to the step S1.
In summary, the invention provides a test discharging device and a test discharging method for a flexible direct current converter valve power module, wherein the test discharging device comprises a test discharging part and a discharge discharging part, the test discharging part can realize voltage detection of the power module, has compatibility in structural design, is suitable for power modules with various structural differences, and can implement discharge operation according to the voltage detection result. Furthermore, the power module is subjected to graded discharge by arranging the first discharge loop and the second discharge loop, so that the targeted differential discharge is realized, and the discharge operation can be performed in a manual or automatic mode. According to the technical scheme, the capacitor voltage of the power module is rapidly and safely discharged, and the safety performance of the flexible direct current converter valve is improved.
Drawings
FIG. 1 is a topological structure diagram of a half-bridge power module;
FIG. 2 is a schematic block diagram of the electroscope section;
fig. 3 is a schematic structural view of the discharge portion.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The following describes the technical scheme of the present invention in detail with reference to the accompanying drawings. According to one embodiment of the invention, an optometric device for a flexible dc converter valve power module is provided. The converter valve is the most core equipment of the flexible direct current transmission system, the power modules are basic units forming the flexible direct current converter valve, and each power module consists of a full-control device, a module capacitor, a bypass switch, a bypass thyristor, a voltage equalizing resistor and the like. Fig. 1 shows a topological structure diagram of a half-bridge power module, and as shown in fig. 1, the power module comprises two power electronic devices T1 and T2 connected in series, two ends of the T1 and T2 are respectively connected in parallel with diodes D1 and D2, two ends of the T1 and T2 are connected in parallel with a resistor R and a capacitor C, and two ends of the T2 are connected in parallel with a bypass switch K and a thyristor T. The test discharging device provided by the embodiment is connected with the DC+ and the DC-at the two ends of the capacitor C of the power module, so as to realize capacitor voltage acquisition and discharging operation of the power module. The test discharging device of the flexible direct current converter valve power module comprises a test discharging part and a discharging part. The electricity testing contact of the electricity testing part is connected with two ends of the direct current capacitor of the power module so as to collect and display the voltage of the power module; the input terminal of the discharging part is connected with the discharging interface of the electricity checking part to perform discharging operation according to the voltage of the power module.
In fig. 2, a schematic structural diagram of an electricity checking part including a T-shaped insulating rod 3 is shown; two ends of a T-shaped cross beam of the insulating rod 3 are provided with two electricity testing contacts 1, and the tail part of a T-shaped longitudinal beam of the insulating rod 3 is provided with an insulating handle 4. For example, two discharging interfaces 2 on the insulating rod 3 can be respectively connected with positive and negative interfaces of a discharging part through wires, the length of the insulating rod 3 and the distance between the electricity checking contacts 1 are adjusted, and the electricity checking contacts 1 are arranged on DC+ and DC-at two ends of the power module capacitor C. To perform the test discharge of the capacitor voltage of the power module. The insulating rod 3 is a hollow insulating rod, and the inside of the insulating rod comprises a voltage acquisition module 5, an LCD display module 6 and a first power supply module 7; the voltage acquisition module 5 is connected with the electricity inspection contact 1 to acquire the voltage of the power module, and the measuring range of the voltage acquisition module 5 is 0-4000V; the LCD display module 6 is connected with the output of the voltage acquisition module 5 and is used for displaying the acquired voltage, and the display range of the LCD display module 6 is 0-4000V; the first power module 7 is connected to the LCD display module 6 through a first switch K1, and is configured to supply power to the LCD display module 6. The insulating rod 3 is telescopic; the distance between the two electrical inspection contacts 1 is adjustable, and the electrical inspection contacts can be disassembled, bent and deformed. For example, the T-shaped cross beam adopts a guide rail type structure, two electricity inspection contacts are fixed on the guide rail by screws, and the distance between the two electricity inspection contacts can be adjusted by unscrewing the fixing screws. The wall of the T-shaped longitudinal beam is telescopic by adopting a clamping groove type structure, two insulating rods are adopted to form an insulating rod 3, the insulating rod with large cross section diameter is sleeved on the insulating rod with small cross section diameter, a plurality of fixing holes are formed in the wall of the two insulating rods, the two insulating rods are telescopic and have variable lengths, the fixing holes are inserted by using high-voltage insulating nut rods, and the fixed length of the screw is screwed down. The electricity checking part can further comprise an indicator lamp 7, when electricity checking is carried out, the first switch K1 is closed, the indicator lamp D7 is on, the LCD display module 6 is electrified, and the voltage acquisition module 5 transmits a voltage signal acquired in real time to the LCD display module 6 for display through conditioning, filtering and A/D conversion, so that the capacitance voltage of the power module can be intuitively displayed in real time. The first power module 7 may be a battery, so that external power is not required, and portability is improved.
Fig. 3 shows a schematic diagram of a discharge part, which includes a discharge module and a discharge control module, the input ends of which are connected; the discharging module comprises a first discharging loop and a second discharging loop; the discharge control module comprises a second power supply module and a control module which are connected with each other. The first discharging circuit comprises a first high-voltage relay KM1 and a first discharging resistor R1 which are connected with each other; the second discharging circuit comprises a second high-voltage relay KM2 and a second discharging resistor R2 which are connected with each other. The control module comprises a first high-voltage relay coil KM1-W and a third switch K3 which are connected in series in a first control loop, a second high-voltage relay coil KM2-W and a fourth switch K4 which are connected in series in a second control loop, a first high-voltage relay coil KM1-W and a fifth switch K5 which are connected in series in the third control loop, and a second high-voltage relay coil KM2-W and a sixth switch K6 which are connected in series in the fourth control loop. Also comprises indicator lights D3-D6 and a buzzer H. The second power module may include a battery E1 and a DC/DC circuit, where the battery E1 and the DC/DC circuit are connected through a second switch K2, and the DC/DC circuit converts a voltage of the battery E1 into a voltage required for power supply of the control module, the buzzer, and the indication lamp, so as to provide a power supply for the control module. The control module can automatically control the on-off of the first high-voltage relay KM1 and the second high-voltage relay KM2 so as to control the input and the cutting of the first discharging resistor R1 and the second discharging resistor R2, thereby realizing the graded discharge of the discharge. Or the on-off of the first and second high-voltage relays KM1 and KM2 can be controlled by manually operating the switches K3 and K4 so as to control the input and the cut-off of the first and second discharge resistors R1 and R2, thereby realizing the graded discharge of the discharge. The control module controls the buzzer H to alarm when the capacitor voltage of the power module is higher than a certain threshold value through judging the acquired voltage value, and the indicator lamps D3, D4 and D5 can be lightened when the capacitor voltage is in a specific range, so that the power module has a voltage grading early warning function.
According to another embodiment of the present invention, there is provided a method for testing discharge of a flexible dc converter valve power module, the method using the apparatus according to the first embodiment of the present invention to test discharge, all switches of a discharge portion being in an off state when starting the test, comprising the steps of:
s1, closing a first switch to obtain the capacitance voltage U of the power module.
S2, comparing the capacitor voltage U with the upper voltage threshold U H If U is greater than or equal to U H The control module sends out a starting signal to enable the buzzer H to send out an alarm, and the high-voltage early warning function is achieved. Waiting for the capacitor voltage U to slowly bleed to the upper voltage threshold U H A certain waiting time can be set, and the step S1 is returned to acquire the capacitance voltage U of the power module again; if U is less than U H Step S3 is performed.
S3, comparing the capacitor voltage U with the lower voltage threshold U L If U is smaller than U L Stopping discharging, and ending the method; if U is greater than or equal to U L Step S4 is executed;
s4, comparing the capacitor voltage with a first voltage threshold U 1 And a second voltage threshold U 2 And selecting the discharge loop pair power module according to the comparison resultDischarging;
s5, returning to the step S1.
The upper voltage threshold is 4000V, the lower voltage threshold is 5V, the first voltage threshold is 2500V, and the second voltage threshold is 1000V.
The selecting a discharging loop to discharge the power module in an automatic mode (ensuring that the third switch and the fourth switch are turned off) according to the comparison result comprises:
if U is greater than or equal to U 1 Closing a fifth switch and a first high-voltage relay, lighting a high-voltage warning indicator lamp D3, connecting a first discharge resistor R1 into a discharge circuit to discharge through a first discharge loop, and returning to the step S1;
if U is 1 >U≥U 2 Opening the fifth switch, opening the first high-voltage relay, closing the sixth switch and the second high-voltage relay, lighting the low-voltage warning indicator lamp D4, switching the second discharge resistor R2 into the discharge circuit to discharge through the second discharge circuit, and returning to the step S1;
if U is less than U 2 And when the safety voltage indicator lamp D5 is turned on, the first high-voltage relay and the second high-voltage relay are turned on, the first discharging resistor R1 and the second discharging resistor R2 are connected into the discharging circuit, so that the first discharging circuit and the second discharging circuit are connected in parallel for discharging, and the step S1 is returned.
Alternatively, the power module may be controlled manually (to ensure that the fifth switch and the sixth switch are turned off), and the selecting the discharging circuit to discharge the power module according to the comparison result includes:
if U is greater than or equal to U 1 Manually closing a third switch, lighting a high-voltage warning indicator lamp D3, connecting a first discharge resistor R1 into a discharge circuit, electrifying a coil of a first high-voltage relay to close the first high-voltage relay so as to discharge through a first discharge loop, and returning to the step S1;
if U is 1 >U≥U 2 The third switch is manually opened, the fourth switch is closed, the coil of the second high-voltage relay is electrified to open the first high-voltage relay to close the second high-voltage relay, the low-voltage warning indicator lamp D4 is on, and the second discharge resistor is connected with the first high-voltage relayR2 is connected into the discharge circuit to discharge through the second discharge loop, and the step S1 is returned;
if U is less than U 2 And when the safety voltage indicator lamp D5 is on, the first discharging resistor R1 and the second discharging resistor R2 are connected into a discharging circuit to be discharged in parallel through the first discharging circuit and the second discharging circuit, and the step S1 is returned.
In summary, the invention relates to a test discharging device and a test discharging method for a flexible direct current converter valve power module, wherein the test discharging device comprises a test discharging part and a discharge discharging part, the test discharging part can realize voltage detection of the power module, has compatibility in structural design, is suitable for power modules with various structural differences, and can implement discharge operation according to the voltage detection result. Furthermore, the power module is subjected to graded discharge by arranging the first discharge loop and the second discharge loop, so that the targeted differential discharge is realized, and the discharge operation can be performed in a manual or automatic mode. According to the technical scheme, the capacitor voltage of the power module is rapidly and safely discharged, and the safety performance of the flexible direct current converter valve is improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (7)
1. The method for discharging by adopting the electricity checking and discharging device of the flexible direct current converter valve power module is characterized by comprising an electricity checking part and a discharging part; wherein,
the electricity testing contact of the electricity testing part is connected with two ends of the direct current capacitor of the power module so as to collect and display the voltage of the power module;
the input terminal of the discharging part is connected with the discharging interface of the electricity testing part so as to perform discharging operation according to the voltage of the power module, and the discharging part comprises a discharging module and a discharging control module, wherein the input end of the discharging module is connected with the discharging control module; the discharging module comprises a first discharging loop and a second discharging loop; the discharging control module comprises a second power supply module and a control module which are connected with each other, wherein the control module comprises a first high-voltage relay coil and a third switch which are connected in series in a first control loop, a second high-voltage relay coil and a fourth switch which are connected in series in a second control loop, a first high-voltage relay coil and a fifth switch which are connected in series in a third control loop, and a second high-voltage relay coil and a sixth switch which are connected in series in a fourth control loop;
the method comprises the following steps:
s1, closing a first switch to obtain a capacitance voltage U of a power module;
s2, comparing the capacitor voltage U with the upper voltage threshold U H If U is greater than or equal to U H The third, fourth, fifth and sixth switches are turned off to prohibit the discharging part from discharging the power module, and the step S1 is returned; if U is<U H Step S3 is executed;
s3, comparing the capacitor voltage U with the lower voltage threshold U L If U is the size of<U L Stopping discharging, and ending the method; if U is greater than or equal to U L Step S4 is executed;
s4, comparing the capacitor voltage with a first voltage threshold U 1 And a second voltage threshold U 2 The power module is discharged by selecting a discharge loop according to the comparison result;
s5, returning to the step S1.
2. The method of claim 1, wherein the electroscopic section comprises a T-shaped insulating rod;
two ends of a T-shaped cross beam of the insulating rod are provided with two electricity testing contacts, and the tail part of the T-shaped longitudinal beam of the insulating rod is provided with an insulating handle.
3. The method of claim 2, wherein the insulating rod is a hollow insulating rod, and the interior of the insulating rod comprises a voltage acquisition module, an LCD display module and a first power module;
the voltage acquisition module is connected with the electricity inspection contact to acquire the voltage of the power module;
the LCD display module is connected with the output of the voltage acquisition module and is used for displaying the acquired voltage;
the first power supply module is connected with the LCD display module through a first switch and is used for supplying power to the LCD display module.
4. A method according to claim 3, wherein the insulating rod is telescopic; the distance between the two electricity inspection contacts is adjustable.
5. The method of claim 4, wherein the first discharge circuit comprises a first high voltage relay and a first discharge resistor connected to each other; the second discharge loop comprises a second high-voltage relay and a second discharge resistor which are connected with each other.
6. The method of claim 5, wherein the selecting a discharge loop to automatically discharge the power module based on the comparison result comprises:
if U is greater than or equal to U 1 Closing the fifth switch and the first high-voltage relay to discharge through the first discharge loop, and returning to the step S1;
if U is 1 >U≥U 2 Opening the fifth switch, closing the sixth switch, opening the first high-voltage relay, closing the second high-voltage relay to discharge through the second discharge loop, and returning to the step S1;
if U is less than U 2 And when the first high-voltage relay and the second high-voltage relay are connected in parallel, the fifth switch and the sixth switch are closed, the first high-voltage relay and the second high-voltage relay are discharged in parallel through the first discharging loop and the second discharging loop, and the step S1 is returned.
7. The method of claim 6, wherein selecting a discharge circuit to manually discharge the power module based on the comparison result comprises:
if U is greater than or equal to U 1 Manually closing the third switch, electrifying the coil of the first high-voltage relay to close the first high-voltage relay so as to discharge through the first discharge loop, and returning to the step S1;
if U is 1 >U≥U 2 Manually opening the third switch, closing the fourth switch, electrifying the coil of the second high-voltage relay so as to open the first high-voltage relay, closing the second high-voltage relay, discharging through the second discharging loop, and returning to the step S1;
if U is less than U 2 And when the first high-voltage relay and the second high-voltage relay are closed by manually closing the third switch and the fourth switch, electrifying the coils of the first high-voltage relay and the second high-voltage relay so as to discharge in parallel through the first discharging loop and the second discharging loop, and returning to the step S1.
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| CN202111140676.7A CN114006523B (en) | 2021-09-28 | 2021-09-28 | Test discharging device and method for flexible direct current converter valve power module |
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| CN202111140676.7A CN114006523B (en) | 2021-09-28 | 2021-09-28 | Test discharging device and method for flexible direct current converter valve power module |
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| CN114006523A CN114006523A (en) | 2022-02-01 |
| CN114006523B true CN114006523B (en) | 2023-12-29 |
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| CN116169866A (en) * | 2022-11-30 | 2023-05-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Device for discharging capacitance of power module |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626918A (en) * | 2006-12-22 | 2010-01-13 | 沃尔沃技术公司 | Method and arrangement for discharging an energy storage system for electrical energy |
| CN103675540A (en) * | 2013-12-04 | 2014-03-26 | 国家电网公司 | Shunt capacitor bank discharge device |
| CN205943742U (en) * | 2016-08-08 | 2017-02-08 | 广东电网有限责任公司惠州供电局 | Take electroscopic function's discharge device of a capacitor |
| CN108519544A (en) * | 2018-04-08 | 2018-09-11 | 国网江苏省电力有限公司苏州供电分公司 | Pressure-resistant test system and test method between a kind of DC voltage support capacitor terminal |
| CN110927434A (en) * | 2020-02-13 | 2020-03-27 | 天津美腾科技股份有限公司 | Discharge test circuit and discharge test device |
| CN111431389A (en) * | 2020-04-15 | 2020-07-17 | 中国南方电网有限责任公司超高压输电公司广州局 | MMC power module quick discharge circuit |
| CN111555334A (en) * | 2020-04-15 | 2020-08-18 | 南京南瑞继保电气有限公司 | Active discharge method and control device for high-voltage direct-current cable and electronic equipment |
| CN112003038A (en) * | 2020-08-14 | 2020-11-27 | 广东电网有限责任公司 | Capacitor discharging device and discharging method thereof |
| CN112086993A (en) * | 2020-09-10 | 2020-12-15 | 南京南瑞继保电气有限公司 | Flexible direct-current transmission line discharging method and device and storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108111007B (en) * | 2018-01-31 | 2020-09-08 | 南京南瑞继保电气有限公司 | Power module redundancy energy-taking circuit and control method |
-
2021
- 2021-09-28 CN CN202111140676.7A patent/CN114006523B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626918A (en) * | 2006-12-22 | 2010-01-13 | 沃尔沃技术公司 | Method and arrangement for discharging an energy storage system for electrical energy |
| CN103675540A (en) * | 2013-12-04 | 2014-03-26 | 国家电网公司 | Shunt capacitor bank discharge device |
| CN205943742U (en) * | 2016-08-08 | 2017-02-08 | 广东电网有限责任公司惠州供电局 | Take electroscopic function's discharge device of a capacitor |
| CN108519544A (en) * | 2018-04-08 | 2018-09-11 | 国网江苏省电力有限公司苏州供电分公司 | Pressure-resistant test system and test method between a kind of DC voltage support capacitor terminal |
| CN110927434A (en) * | 2020-02-13 | 2020-03-27 | 天津美腾科技股份有限公司 | Discharge test circuit and discharge test device |
| CN111431389A (en) * | 2020-04-15 | 2020-07-17 | 中国南方电网有限责任公司超高压输电公司广州局 | MMC power module quick discharge circuit |
| CN111555334A (en) * | 2020-04-15 | 2020-08-18 | 南京南瑞继保电气有限公司 | Active discharge method and control device for high-voltage direct-current cable and electronic equipment |
| CN112003038A (en) * | 2020-08-14 | 2020-11-27 | 广东电网有限责任公司 | Capacitor discharging device and discharging method thereof |
| CN112086993A (en) * | 2020-09-10 | 2020-12-15 | 南京南瑞继保电气有限公司 | Flexible direct-current transmission line discharging method and device and storage medium |
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