CN114993464A - Optical power detection system of thyristor control unit of converter valve - Google Patents
Optical power detection system of thyristor control unit of converter valve Download PDFInfo
- Publication number
- CN114993464A CN114993464A CN202210929263.5A CN202210929263A CN114993464A CN 114993464 A CN114993464 A CN 114993464A CN 202210929263 A CN202210929263 A CN 202210929263A CN 114993464 A CN114993464 A CN 114993464A
- Authority
- CN
- China
- Prior art keywords
- voltage
- thyristor
- control unit
- thyristor control
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 88
- 230000003287 optical effect Effects 0.000 title claims abstract description 84
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 238000002955 isolation Methods 0.000 claims description 13
- 230000007423 decrease Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 7
- 230000009466 transformation Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
-
- 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
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2601—Apparatus or methods therefor
-
- 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
- H02M1/06—Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/1555—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with control circuit
-
- 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
-
- 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]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Power Conversion In General (AREA)
Abstract
The application relates to a light power detection system of a thyristor control unit of a converter valve, which comprises a thyristor, the thyristor control unit and power detection equipment, wherein the thyristor is continuously powered by an external power supply; the thyristor in the continuous power-on state transmits an optical pulse signal to the thyristor control unit, the thyristor control unit transmits the optical pulse signal to the power detection equipment, and the power detection equipment performs power measurement on the received optical pulse signal to obtain a power measurement result. The whole scheme is used for continuously supplying power to the thyristor, so that the thyristor control unit is continuously electrified, the light pulse signals generated by the thyristor are sent to the measuring equipment through the thyristor control unit, the measuring equipment is further improved to measure the light pulse signals, the light power measuring result of the thyristor control unit is obtained, simplicity and high efficiency are achieved, and the light power detection can be directly carried out on the thyristor control unit when the converter valve is overhauled.
Description
Technical Field
The application relates to the technical field of high-voltage direct-current transmission, in particular to a light power detection system of a thyristor control unit of a converter valve.
Background
In a high-voltage direct-current transmission system, a TCU (Thyristor Control Unit) and a valve Control Unit are usually communicated by an optical pulse signal, but the optical power of an optical transmitter is gradually reduced under long-time operation, and communication is interrupted when the optical power is smaller than a minimum rated value of a receiver. Since the optical power does not fail until it is reduced to the minimum rating of the receiving device, such failures are difficult to detect in routine service and maintenance.
A plurality of TCUs are connected in series to the converter valves and, if they are to operate, require very high voltages to be applied to the converter valves, in which case they cannot be approached and measured.
A general optical power meter can detect only the optical power of continuous light emission, but a signal of a pulse signal, which is sometimes not measured, and thus the detection efficiency of the thyristor control unit is low.
Disclosure of Invention
In view of the above, there is a need to provide an optical power detection system, method, computer device and computer readable storage medium for a thyristor control unit of a converter valve, which can improve detection efficiency.
The application provides a light power detection system of a thyristor control unit of a converter valve. The system comprises a thyristor, a thyristor control unit and power detection equipment, wherein the thyristor is continuously powered by an external power supply;
the thyristor in the continuous power-on state transmits an optical pulse signal to the thyristor control unit, the thyristor control unit transmits the optical pulse signal to the power detection equipment, and the power detection equipment performs power measurement on the received optical pulse signal to obtain a power measurement result.
In one embodiment, the number of the thyristor control units is multiple, and the multiple thyristor control units are connected in series.
In one embodiment, the thyristor further comprises an external power supply, and the external power supply is connected with the thyristor.
In one embodiment, the thyristor control unit further comprises an isolation transformation component, and the thyristor control unit is connected with an external power supply through the isolation transformation component.
In one embodiment, the thyristor control unit obtains the voltage of the thyristor, and sends an optical pulse signal to the power detection device when the determined voltage reaches the rated voltage.
In one embodiment, the power detection device comprises a light receiving tube, a voltage comparison module and a display module; the input end of the voltage comparison module is connected with the light receiving tube, and the output end of the voltage comparison module is connected with the display module.
In one embodiment, when the voltage at the input terminal of the voltage comparison module is greater than the preset threshold voltage of the voltage comparison module, the power measurement result is displayed on the display module.
In one embodiment, the voltage comparison module comprises N voltage comparators, the display module comprises N indicator lights, and N is a positive integer not less than 3; the non-inverting input end of each voltage comparator is connected with the light receiving tube, the inverting input end of each voltage comparator is respectively connected with the preset threshold voltage with different sizes, and the output end of each voltage comparator is respectively connected with each indicator lamp in a one-to-one correspondence mode.
In one embodiment, the power detection device comprises a light receiving tube, 3 voltage comparators and 3 indicator lamps; the non-inverting input end of 3 voltage comparators is connected with the light-receiving tube, and the inverting input end of 3 voltage comparators inserts first preset threshold voltage, the preset threshold voltage of second and the preset threshold voltage of third respectively, and 3 voltage comparators's output is connected with 3 pilot lamps one-to-one respectively.
In one embodiment, the first preset threshold voltage, the second preset threshold voltage and the third preset threshold voltage are sequentially decreased.
The optical power detection system of the thyristor control unit of the converter valve comprises a thyristor, the thyristor control unit and power detection equipment, wherein the thyristor is continuously powered by an external power supply; the thyristor in the continuous power-on state transmits an optical pulse signal to the thyristor control unit, the thyristor control unit transmits the optical pulse signal to the power detection equipment, and the power detection equipment performs power measurement on the received optical pulse signal to obtain a power measurement result. The thyristor is continuously powered by the whole scheme, the thyristor control unit is continuously electrified, the optical pulse signals generated by the thyristor are sent to the measuring equipment through the thyristor control unit, the measuring equipment is further improved to measure the optical pulse signals, the optical power measuring result of the thyristor control unit is obtained, and the thyristor control unit is simple and efficient.
Drawings
FIG. 1 is a schematic structural diagram of an optical power detection system of a thyristor control unit of a converter valve in one embodiment;
FIG. 2 is a schematic structural diagram of an optical power detection system of a thyristor control unit of a converter valve in another embodiment;
fig. 3 is a schematic structural diagram of a power detection device in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In a high-voltage direct-current transmission circuit, the fault detection of a thyristor control unit in a converter valve is a difficult problem. Since a conventional optical power meter can only detect the optical power of a continuously emitting device, the sometimes intermittent signal, i.e. the optical pulse signal, transmitted during the operation of the converter valve cannot be measured. The circuit of the thyristor control unit of the converter valve needs to be changed to enable the optical device to continuously emit light, and then the optical power meter is used for measurement. However, the circuit of the thyristor control unit cannot be disassembled or changed on the converter valve, so that the measurement cannot be carried out by using a common optical power meter. An optical power meter capable of measuring a pulse signal is too costly and requires to detach the thyristor from the converter valve to supply power to the thyristor control unit, so it cannot be used on the converter valve.
Based on the above-mentioned defects, the present application provides a system that can supply power to a thyristor control unit and detect the power of an optical pulse signal without disassembling the thyristor control unit of a converter valve. Referring to fig. 1, the optical power detection system of the thyristor control unit of the converter valve provided by the present application includes a thyristor 01, a thyristor control unit 02 and a power detection device 03, wherein the thyristor is continuously powered by an external power supply. The thyristor 01 in the continuous power-on state transmits an optical pulse signal to the thyristor control unit 02, the thyristor control unit 02 transmits the optical pulse signal to the power detection device 03, and the power detection device 03 performs power measurement on the received optical pulse signal to obtain a power measurement result.
Specifically, the thyristor 01 is connected with the thyristor control unit 02, the power detection device 03 is connected with the thyristor control unit 02 through an optical cable, and the external power supply continuously supplies power to the thyristor 01. Since the thyristor control unit 02 belongs to a part of the thyristor 01 (thyristor level), the control unit is in a normal operating state after the thyristor 01 is energized. The thyristor control unit 02 comprises a light emitting tube, when the thyristor 01 is powered on, a light pulse signal is generated inside the thyristor 01, after the voltage flowing through the thyristor 01 reaches a rated value, the light emitting tube of the thyristor control unit 02 sends the light pulse signal to the power measurement equipment, and after the power measurement equipment receives the light pulse signal, the light power of the thyristor control unit 02 is measured to obtain a power measurement result.
The optical power detection system of the thyristor control unit of the converter valve comprises a thyristor 01, a thyristor control unit 02 and power detection equipment 03, wherein the thyristor is continuously powered by an external power supply; the thyristor 01 in the continuous power-on state transmits an optical pulse signal to the thyristor control unit 02, the thyristor control unit 02 transmits the optical pulse signal to the power detection device 03, and the power detection device 03 performs power measurement on the received optical pulse signal to obtain a power measurement result. The thyristor 01 is continuously powered by the whole scheme, the thyristor control unit 02 is continuously electrified, the optical pulse signals generated by the thyristor 01 are sent to the measuring equipment through the thyristor control unit 02, the measuring equipment is further improved to measure the optical pulse signals, the optical power measuring result of the thyristor control unit 02 is obtained, simplicity and high efficiency are achieved, and the optical power detection can be directly carried out on the thyristor control unit 02 when the converter valve is overhauled.
In one embodiment, the number of the thyristor control units 02 is plural, and the plural thyristor control units 02 are connected in series.
Specifically, a plurality of thyristors 01 may be connected in series inside the converter valve, and a thyristor control unit 02 may be provided inside each thyristor 01, and thus, the plurality of thyristor control units 02 are connected in series. Each thyristor control unit 02 can be connected with a power detection device 03, when an optical pulse signal flows through the current thyristor 01, the thyristor control unit 02 sends the optical pulse signal to the power detection device 03, and after receiving the optical pulse signal, the power detection device 03 detects the power of the optical pulse signal to obtain a power detection result.
In this embodiment, by accessing the power detection device 03 to the plurality of thyristors 01 connected in series in the converter valve, the thyristor control units 02 at different positions inside the converter valve can be subjected to fault detection, the fault positions of the converter valve in the high-voltage direct-current power transmission process can be found in time, and the failed thyristor control units 02 can be replaced in time, so that the risk of communication interruption is avoided.
In one embodiment, as shown in fig. 2, an external power source 04; an external power supply 04 is connected to the thyristor 01.
Specifically, the optical power detection system of the thyristor control unit of the converter valve comprises a thyristor 01, a thyristor control unit 02, a power detection device 03 and a power supply 04, wherein the power supply is connected with the thyristor 01, the power supply can be connected to commercial power to continuously supply power to the thyristor 01, the thyristor control unit 02 is in a working state, an optical pulse signal flowing through the thyristor 01 is sent to the power detection device 03, and the optical pulse signal is detected by the power detection device 03 after receiving the optical pulse signal to obtain a power detection result.
In this embodiment, the thyristor 01 is powered by an external power supply connected to the mains supply, so that the thyristor control unit 02 can be always in a working state, and the optical pulse signal flowing through the thyristor 01 can be sent to the power detection device 03 without detaching or changing the circuit of the thyristor control unit 02, and the thyristor control unit 02 is continuously subjected to power detection, and is replaced when a fault is discovered. The optical power detection system of the thyristor control unit of the converter valve can be used for detecting the optical pulse power of the thyristor control unit when the high-voltage direct-current transmission converter valve is in power failure maintenance.
In one embodiment, the thyristor control unit 02 is connected to the external power source 04 through the isolation transformer assembly.
Specifically, the optical power detection system of the thyristor control unit of the converter valve comprises a thyristor 01, a thyristor control unit 02, power detection equipment 03, an external power supply 04 and an isolation transformer, wherein the input end of the external power supply 04 is connected with a mains supply, the output end of the external power supply 04 is connected with the isolation transformer, and the isolation transformer is connected with the thyristor 01. After an external power supply 04 is connected to a mains supply, voltage transformation is carried out through an isolation transformer, the voltage connected to the external power supply 04 is converted into voltage required by the thyristor 01 to work, the thyristor 01 is continuously supplied with power, a thyristor control unit 02 is in a working state, an optical pulse signal flowing through the thyristor 01 is sent to a power detection device 03, and the optical pulse signal is detected after the power detection device 03 receives the optical pulse signal to obtain a power detection result.
In this embodiment, the access voltage of the external power source 04 is converted by the isolation transformer, so that the voltage required for normal operation can be provided for the thyristor 01, the thyristor control unit 02 is always in an operating state, the optical pulse signal flowing through the thyristor 01 is sent to the power detection device 03, the power of the thyristor control unit 02 is continuously detected, and a fault is discovered and replaced. Moreover, the power detection device 03 in the embodiment has the advantages of small volume, low cost, light weight, portability and simple use, can be moved at will on the site of the converter valve, can be used for detecting any thyristor control unit 02 on the converter valve, and improves the maintenance efficiency of the converter valve.
In one embodiment, the thyristor control unit 02 acquires the voltage of the thyristor 01, and transmits an optical pulse signal to the power detection device 03 when it is determined that the voltage reaches the rated voltage.
Specifically, in the high-voltage direct-current transmission process, when high-voltage current flows through the thyristor 01 of the converter valve, the thyristor control unit 02 obtains the voltage of the thyristor, the voltage of the thyristor 01 is judged, when the judged voltage reaches the rated voltage, the thyristor 01 converts the voltage into an optical pulse signal through the light emitting tube, the optical pulse signal is sent to the power detection device 03, and after the optical pulse signal is received by the power detection device 03, the optical pulse signal is detected to obtain a power detection result.
In one embodiment, the power detection device 03 comprises a light receiving tube, a voltage comparison module and a display module; the input end of the voltage comparison module is connected with the light receiving tube, and the output end of the voltage comparison module is connected with the display module.
Specifically, a light receiving tube of the power detection device 03 receives an optical pulse signal sent by the thyristor 01, converts the optical pulse signal into a pulse current, converts the pulse current into a voltage through a resistor, inputs the voltage into a voltage comparison module, detects the voltage by the voltage comparison module, and inputs a detection result into a display module so that the display module displays according to the detection result.
In this embodiment, the light receiving tube of the power detection device 03 receives the light pulse signal sent by the thyristor control unit 02, and then converts the light pulse signal into a voltage that can be directly measured, the voltage comparison module of the power detection device 03 detects the voltage, and finally the voltage detection result is displayed by the display module, that is, the light power transmitted by the thyristor control unit 02 is detected, so that whether the thyristor control unit 02 needs to be replaced due to the reduction of the light power can be visually displayed, and the risk of tripping of the converter valve due to communication interruption is reduced.
In one embodiment, when the voltage at the input terminal of the voltage comparison module is greater than the preset threshold voltage of the voltage comparison module, the power measurement result is displayed on the display module.
Specifically, the light receiving tube of the power detection device 03 receives an optical pulse signal sent by the thyristor control unit 02, converts the optical pulse signal into a pulse current, converts the pulse current into a voltage through the resistor, inputs the voltage into the voltage comparison module, detects the voltage according to a preset threshold voltage by the voltage comparison module, and displays a power detection result on the display module when the voltage at the input end of the voltage comparison module is greater than the preset threshold voltage.
In this embodiment, the voltage after the conversion of the optical pulse signal transmitted by the thyristor control unit 02 is compared with the preset threshold voltage by the voltage comparison module to obtain a power detection result, and when the voltage comparison module determines that the converted voltage is greater than the preset threshold voltage, the power detection result is displayed on the display module so that a user can visually check the power detection result, and the user can visually know the current working condition of the thyristor control unit 02 according to the display condition of the display module.
In one embodiment, the voltage comparison module comprises N voltage comparators, the display module comprises N indicator lights, and N is a positive integer not less than 3; the non-inverting input end of each voltage comparator is connected with the light receiving tube, the inverting input end of each voltage comparator is respectively connected with the preset threshold voltage with different sizes, and the output end of each voltage comparator is respectively connected with each indicator lamp in a one-to-one correspondence mode.
The indicating lamp is used for indicating the output of the different voltage comparators, and the indicating lamp can be an LED lamp.
Specifically, the power detection device 03 includes a light receiving tube, N voltage comparators, and N indicator lights, where N is a positive integer not less than 3, that is, the power detection device 03 includes a light receiving tube, at least three voltage comparators, and at least three indicator lights. The non-inverting input end of each voltage comparator is connected with the light receiving tube to receive the voltage converted by the light receiving tube, the inverting input end of each voltage comparator is respectively connected with the preset threshold voltage with different sizes, and the output end of each voltage comparator is respectively connected with one indicator lamp. And each voltage comparator compares the converted voltage with a preset threshold voltage, and when the converted voltage is greater than or equal to the preset threshold voltage in the voltage comparator, the voltage comparator outputs a high level, and an indicator light connected with the voltage comparator is on. When the converted voltage is smaller than the preset threshold voltage in the voltage comparator, the voltage comparator outputs a low level, and an indicator light connected with the voltage comparator is not turned on. According to the display condition of the indicator lamp, a user can intuitively know the current working condition of the thyristor control unit 02. When the indicator lights connected with the voltage comparators are equal, it is indicated that the light pulse power in the thyristor control unit 02 is large, and the thyristor control unit 02 is in a normal working condition. When the indicator lamps connected with the voltage comparators are not on, the light pulse power of the thyristor control unit 02 is indicated to be lower than the rated value of the receiving end of the converter valve, and the thyristor control unit 02 has a fault and cannot be used continuously. When the indicator lamps connected to the respective voltage comparators are partially turned on, the degree of failure of the thyristor control unit 02 can be judged according to the display number of the indicator lamps.
In one embodiment, as shown in fig. 3, the power detection device 03 includes a light receiving tube, 3 voltage comparators, and 3 indicator lights; the in-phase input end of 3 voltage comparators is connected with the light-receiving tube, and the inverting input end of 3 voltage comparators inserts first threshold voltage, second threshold voltage and the third threshold voltage of predetermineeing respectively, and 3 voltage comparators's output is connected with 3 pilot lamps one-to-one respectively.
Specifically, taking the LED lamp implementation for the indicator lamp as an example, the optical power detection system of the thyristor control unit 02 of the converter valve includes a thyristor 01, a thyristor control unit 02, an external power supply 04, a battery, a light receiving tube X1, 3 voltage comparators, 3 LED lamps, and a plurality of resistors. The 3 voltage comparators are a first voltage comparator U1, a second voltage comparator U2 and a third voltage comparator U3 from left to right. The 3 LED lamps are a first LED lamp LED1, a second LED lamp LED2, and a third LED lamp LED3, respectively. The first LED lamp is connected with the first voltage comparator, the second LED lamp is connected with the second voltage comparator, and the third LED lamp is connected with the third voltage comparator. Therefore, the optical power detection system of the thyristor control unit 02 of the converter valve comprises a thyristor 01, a thyristor control unit 02, an external power supply 04, a battery, a light receiving tube, a first voltage comparator, a second voltage comparator and a third voltage comparator, a first LED lamp connected with the first voltage comparator, a second LED lamp connected with the second voltage comparator, a third LED lamp connected with the third voltage comparator and a plurality of resistors.
The power detection device 03 can be powered by a battery, and the external power supply 04 can be connected to a mains supply to continuously supply power to the thyristor 01. The input end of the external power supply 04 is connected with commercial power, the output end of the external power supply 04 is connected with the isolation transformer, and the isolation transformer is connected with the thyristor 01. After the external power source 04 is connected to the mains supply, voltage transformation is carried out through the isolation transformer, the voltage connected to the external power source 04 is converted into voltage required by the thyristor 01 to work, power is continuously supplied to the thyristor 01, and the thyristor control unit 02 is in a working state.
In the transmission process of the high-voltage direct current, when the high-voltage current flows through the thyristor 01 of the converter valve, the thyristor control unit 02 obtains the voltage of the thyristor 01, the voltage of the thyristor 01 is judged, when the judged voltage reaches the rated voltage, the thyristor control unit 02 converts the voltage into a light pulse signal through the light emitting tube, the light pulse signal is sent to the power detection device 03, after the light receiving tube of the power detection device 03 receives the light pulse signal, and converting the optical pulse signal into pulse current, converting the pulse current into voltage through a resistor, and respectively inputting the voltage into a + end of a first voltage comparator, a + end of a second voltage comparator and a + end of a third voltage comparator, wherein a-end of the first voltage comparator is connected with a first preset threshold voltage, a-end of the second voltage comparator is connected with a second preset threshold voltage, and a-end of the third voltage comparator is connected with a third preset threshold voltage.
When the converted voltage is greater than or equal to a first preset threshold voltage, the first voltage comparator outputs a high level signal, the first LED lamp is on, otherwise, when the converted voltage is less than the first preset threshold voltage, the first voltage comparator outputs a low level signal, and the first LED lamp is off. Similarly, when the converted voltage is greater than or equal to the second preset threshold voltage, the second voltage comparator outputs a high level signal, and the second LED lamp is on, otherwise, when the converted voltage is less than the second preset threshold voltage, the second voltage comparator outputs a low level signal, and the second LED lamp is off. When the converted voltage is greater than or equal to a third preset threshold voltage, the third voltage comparator outputs a high level signal, the third LED lamp is on, otherwise, when the converted voltage is less than the third preset threshold voltage, the third voltage comparator outputs a low level signal, and the third LED lamp is off.
Optionally, the first preset threshold voltage, the second preset threshold voltage and the third preset threshold voltage are sequentially reduced, the first preset threshold voltage is set to be a normal working voltage of the converter valve receiving end, the third preset threshold voltage is set to be a minimum rated voltage of the converter valve receiving end, the second preset threshold voltage is smaller than the first preset threshold voltage and larger than the third preset threshold voltage, the second preset threshold voltage can be set to be an average value of the normal working voltage and a minimum limit voltage of the converter valve receiving end, and the second preset threshold voltage can also be set according to specific requirements. Therefore, when the first LED lamp, the second LED lamp, and the third LED lamp are all turned on, it indicates that the optical pulse power of the thyristor control unit 02 is large at this time, and the thyristor control unit 02 is in a normal operating condition. When the first LED lamp is turned off and the second LED lamp and the third LED lamp are turned on, it is indicated that the optical power of the thyristor control unit 02 has decreased, and the unit decreases to the minimum rated power of the receiving end of the converter valve, and the thyristor control unit 02 can be used continuously. When the first LED lamp and the second LED lamp are turned off and only the third LED lamp is turned on, it indicates that the optical pulse power of the thyristor control unit 02 reaches the critical value, and the thyristor control unit 02 needs to be replaced as soon as possible. When the first LED lamp, the second LED lamp, and the third LED lamp are not lit, it indicates that the optical pulse power of the thyristor control unit 02 is lower than the rated value of the receiving end of the converter valve, and the thyristor control unit 02 cannot be used.
In this embodiment, different working conditions of the thyristor control unit 02 are identified by three voltage comparators and three LED lamps, so that a user can visually judge whether the thyristor control unit 02 needs to be replaced due to the attenuation of the light power.
In one embodiment, the first preset threshold voltage, the second preset threshold voltage, and the third preset threshold voltage may also be sequentially increased, and different voltage thresholds may be set as needed to indicate different working conditions of the thyristor control unit 02.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims (10)
1. The light power detection system of the thyristor control unit of the converter valve is characterized by comprising a thyristor, the thyristor control unit and power detection equipment, wherein the thyristor is continuously powered by an external power supply;
the thyristor in the continuous power-on state transmits an optical pulse signal to the thyristor control unit, the thyristor control unit sends the optical pulse signal to the power detection equipment, and the power detection equipment performs power measurement on the received optical pulse signal to obtain a power measurement result.
2. The system of claim 1, wherein the thyristor control units are plural in number, and are connected in series.
3. The system of claim 1, further comprising an external power source connected to the thyristor.
4. The system of claim 1, further comprising an isolation transformer assembly, the thyristor control unit being connected to the external power source through the isolation transformer assembly.
5. The system according to claim 1, wherein the thyristor control unit obtains a voltage of the thyristor, and when it is determined that the voltage reaches a rated voltage, transmits an optical pulse signal to the power detection device.
6. The system of claim 1, wherein the power detection device comprises a light receiving tube, a voltage comparison module, and a display module;
the input end of the voltage comparison module is connected with the light receiving tube, and the output end of the voltage comparison module is connected with the display module.
7. The system according to claim 6, wherein when the voltage at the input terminal of the voltage comparison module is determined to be greater than the preset threshold voltage of the voltage comparison module, the power measurement result is displayed on the display module.
8. The system according to claim 6, wherein the voltage comparison module comprises N voltage comparators, the display module comprises N indicator lights, and N is a positive integer not less than 3;
the non-inverting input end of each voltage comparator is connected with the light receiving tube, the inverting input end of each voltage comparator is respectively connected with preset threshold voltages with different sizes, and the output end of each voltage comparator is respectively connected with the indicator lamps in a one-to-one correspondence mode.
9. The system of claim 1, wherein the power detection device comprises a light receiving tube, 3 voltage comparators, and 3 indicator lights;
3 voltage comparator's non inverting input end with the light receiving tube is connected, 3 voltage comparator's inverting input end inserts first threshold voltage, second and predetermines threshold voltage and third respectively and predetermines threshold voltage, 3 voltage comparator's output respectively with 3 the pilot lamp one-to-one is connected.
10. The system of claim 9, wherein the first predetermined threshold voltage, the second predetermined threshold voltage, and the third predetermined threshold voltage decrease in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210929263.5A CN114993464B (en) | 2022-08-03 | 2022-08-03 | Optical power detection system of thyristor control unit of converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210929263.5A CN114993464B (en) | 2022-08-03 | 2022-08-03 | Optical power detection system of thyristor control unit of converter valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114993464A true CN114993464A (en) | 2022-09-02 |
| CN114993464B CN114993464B (en) | 2023-09-15 |
Family
ID=83022081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210929263.5A Active CN114993464B (en) | 2022-08-03 | 2022-08-03 | Optical power detection system of thyristor control unit of converter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114993464B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155465A (en) * | 2023-10-26 | 2023-12-01 | 国网经济技术研究院有限公司 | Optical power monitoring device and method for flexible direct current converter valve |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000116110A (en) * | 1998-09-29 | 2000-04-21 | Kansai Electric Power Co Inc:The | Method and instrument for measuring characteristic of optical trigger element and power converter incorporating the same |
| CN202748412U (en) * | 2012-09-06 | 2013-02-20 | 中国人民解放军理工大学气象学院 | Optical auxiliary detection circuit for thunder and lightning detection |
| CN103926524A (en) * | 2014-04-21 | 2014-07-16 | 许继电气股份有限公司 | Method for testing converter valve control device in low-voltage control mode |
| CN104038034A (en) * | 2014-06-20 | 2014-09-10 | 中国西电电气股份有限公司 | Control and monitor method of silicon controlled rectifier converter valve for extreme high voltage direct current power transmission |
| CN104991211A (en) * | 2015-07-06 | 2015-10-21 | 国家电网公司 | High-voltage direct-current power transmission light-controlled converter valve TVM plate automatic test equipment |
| CN204903667U (en) * | 2015-06-11 | 2015-12-23 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Change of current valve under utmost point ground state and additional equipment state detection device thereof |
| CN105823950A (en) * | 2016-05-30 | 2016-08-03 | 中国西电电气股份有限公司 | extra/ultra-high voltage DC transmission converter valve light triggering thyristor level detection device |
| CN106646005A (en) * | 2015-10-29 | 2017-05-10 | 全球能源互联网研究院 | Reliability test platform for emission circuits of optical coupling module of converter valve and test method |
| CN107144777A (en) * | 2017-04-19 | 2017-09-08 | 中国南方电网有限责任公司超高压输电公司昆明局 | A kind of high-pressure thyristor voltage monitoring board checking device and detection method |
| CN206892273U (en) * | 2017-05-19 | 2018-01-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of high voltage direct current converter valve trigger circuit TE board checking devices based on electricity triggering IGCT |
| CN207037055U (en) * | 2017-05-19 | 2018-02-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of high voltage direct current converter valve trigger circuit TVM board checking devices based on light triggered thyristor |
| US20200011923A1 (en) * | 2017-07-10 | 2020-01-09 | Nr Electric Co., Ltd | Thyristor valve test system based on cooperation of logical functions of software |
| CN210039051U (en) * | 2019-07-31 | 2020-02-07 | 成都市西创科技有限公司 | Geological disaster group survey group anti-home early warning display terminal |
| CN112468227A (en) * | 2019-09-06 | 2021-03-09 | 许继集团有限公司 | Valve control system of light-operated converter valve and light trigger channel detection method |
| CN215893785U (en) * | 2021-07-20 | 2022-02-22 | 许继集团有限公司 | Result-visualized portable photoelectric detector |
| CN114485927A (en) * | 2022-02-18 | 2022-05-13 | 许继集团有限公司 | Thyristor trigger signal light intensity on-line monitoring device and valve control system adopting same |
| CN114690109A (en) * | 2022-03-17 | 2022-07-01 | 许继集团有限公司 | Testing device and testing method for thyristor voltage monitoring unit of converter valve |
-
2022
- 2022-08-03 CN CN202210929263.5A patent/CN114993464B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000116110A (en) * | 1998-09-29 | 2000-04-21 | Kansai Electric Power Co Inc:The | Method and instrument for measuring characteristic of optical trigger element and power converter incorporating the same |
| CN202748412U (en) * | 2012-09-06 | 2013-02-20 | 中国人民解放军理工大学气象学院 | Optical auxiliary detection circuit for thunder and lightning detection |
| CN103926524A (en) * | 2014-04-21 | 2014-07-16 | 许继电气股份有限公司 | Method for testing converter valve control device in low-voltage control mode |
| CN104038034A (en) * | 2014-06-20 | 2014-09-10 | 中国西电电气股份有限公司 | Control and monitor method of silicon controlled rectifier converter valve for extreme high voltage direct current power transmission |
| CN204903667U (en) * | 2015-06-11 | 2015-12-23 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Change of current valve under utmost point ground state and additional equipment state detection device thereof |
| CN104991211A (en) * | 2015-07-06 | 2015-10-21 | 国家电网公司 | High-voltage direct-current power transmission light-controlled converter valve TVM plate automatic test equipment |
| CN106646005A (en) * | 2015-10-29 | 2017-05-10 | 全球能源互联网研究院 | Reliability test platform for emission circuits of optical coupling module of converter valve and test method |
| CN105823950A (en) * | 2016-05-30 | 2016-08-03 | 中国西电电气股份有限公司 | extra/ultra-high voltage DC transmission converter valve light triggering thyristor level detection device |
| CN107144777A (en) * | 2017-04-19 | 2017-09-08 | 中国南方电网有限责任公司超高压输电公司昆明局 | A kind of high-pressure thyristor voltage monitoring board checking device and detection method |
| CN206892273U (en) * | 2017-05-19 | 2018-01-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of high voltage direct current converter valve trigger circuit TE board checking devices based on electricity triggering IGCT |
| CN207037055U (en) * | 2017-05-19 | 2018-02-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of high voltage direct current converter valve trigger circuit TVM board checking devices based on light triggered thyristor |
| US20200011923A1 (en) * | 2017-07-10 | 2020-01-09 | Nr Electric Co., Ltd | Thyristor valve test system based on cooperation of logical functions of software |
| CN210039051U (en) * | 2019-07-31 | 2020-02-07 | 成都市西创科技有限公司 | Geological disaster group survey group anti-home early warning display terminal |
| CN112468227A (en) * | 2019-09-06 | 2021-03-09 | 许继集团有限公司 | Valve control system of light-operated converter valve and light trigger channel detection method |
| CN215893785U (en) * | 2021-07-20 | 2022-02-22 | 许继集团有限公司 | Result-visualized portable photoelectric detector |
| CN114485927A (en) * | 2022-02-18 | 2022-05-13 | 许继集团有限公司 | Thyristor trigger signal light intensity on-line monitoring device and valve control system adopting same |
| CN114690109A (en) * | 2022-03-17 | 2022-07-01 | 许继集团有限公司 | Testing device and testing method for thyristor voltage monitoring unit of converter valve |
Non-Patent Citations (2)
| Title |
|---|
| 赖桂森等: "特高压直流输电阀基电子设备光通道的可靠性设计和应用研究", 《电气自动化》 * |
| 赖桂森等: "特高压直流输电阀基电子设备光通道的可靠性设计和应用研究", 《电气自动化》, vol. 43, no. 6, 30 November 2021 (2021-11-30), pages 98 - 101 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117155465A (en) * | 2023-10-26 | 2023-12-01 | 国网经济技术研究院有限公司 | Optical power monitoring device and method for flexible direct current converter valve |
| CN117155465B (en) * | 2023-10-26 | 2024-01-26 | 国网经济技术研究院有限公司 | Optical power monitoring device and method for flexible direct current converter valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114993464B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11632832B2 (en) | Data acquisition methods and apparatus for a network connected LED driver | |
| US20200060005A1 (en) | Monitoring lighting | |
| CN201532437U (en) | Cable number checking and phase checking device | |
| KR101898554B1 (en) | Bi-directional Communication Device Using Frequency Modulation of AC Power Source | |
| JP5263819B2 (en) | Battery monitoring system | |
| KR101921303B1 (en) | Unit control devices and method using control communication phase angle of volts alternating current | |
| KR102114755B1 (en) | Solar cell module monitoring apparatus and method | |
| US10826323B2 (en) | Un-interruptible power supply with voltage-balancing state detection of batteries | |
| CN114993464B (en) | Optical power detection system of thyristor control unit of converter valve | |
| CN110673054B (en) | DC/DC power supply test system and aging test method of DC/DC power supply | |
| KR101419754B1 (en) | Monitoring and error display apparatus for emergency light lamp | |
| CN101896951A (en) | An LED driver method for traffic lanterns | |
| KR101362453B1 (en) | Lamp breakdown checking monitoring for lighting fixture | |
| US8289030B2 (en) | Reliable signaling of fault conditions in battery systems with series-connected cells | |
| CN110831288A (en) | LED lighting device | |
| KR100760296B1 (en) | Lighting control system having voice notice function related operating status and control method thereof | |
| CN216718575U (en) | Microcomputer cable detector for railway signal | |
| CN212514908U (en) | Adhesion detection equipment | |
| JP6744183B2 (en) | Ground fault current detector | |
| CN210742384U (en) | Electric energy meter with detect function | |
| CN104156287A (en) | Hard disk detection system | |
| CN113687295A (en) | Meter front-meter and meter rear-meter power-off fault positioning device, system and method for electric energy meter | |
| KR101123206B1 (en) | Monitoring apparatus for solar generating system | |
| CN201583615U (en) | Advanced electric leakage detection module | |
| CN102411113A (en) | Detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |