CN114629104A - Error-avoiding operation circuit and method for non-contact protector live-line detection - Google Patents
Error-avoiding operation circuit and method for non-contact protector live-line detection Download PDFInfo
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- CN114629104A CN114629104A CN202011434758.8A CN202011434758A CN114629104A CN 114629104 A CN114629104 A CN 114629104A CN 202011434758 A CN202011434758 A CN 202011434758A CN 114629104 A CN114629104 A CN 114629104A
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 230000001012 protector Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 3
- 230000003111 delayed effect Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 2
- 238000012800 visualization Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- 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
- H02J2003/365—Reducing harmonics or oscillations in HVDC
Abstract
The utility model provides a keep away maloperation circuit for electrified detection of non-contact's protector, includes the circuit breaker F that connects in parallel with its output of arbitrary two-phase voltage transformer who is connected in the thread, the parallelly connected first relay K1 in circuit breaker F both ends, first relay K1 series resistance R1, the warning circuit is connected in the drive of the normally open node of first relay K1, the warning circuit includes DC power supply, central processing unit, wireless transmission unit, display element. Compared with the prior art, the direct current transmission system has the advantages that the visualization tool is added to the secondary circuit for measuring the voltage of the incoming line of the converter transformer, the visualization tool can be a display, the display is used for displaying environmental parameters in a power distribution room, when the breaker F is disconnected due to misoperation, the display cannot work due to power failure, the black screen is used for reminding, the wireless transmission unit does not output data to the background, field operators and remote monitoring personnel are prompted to take measures, and the problem of stability of the direct current transmission system is fundamentally solved.
Description
Technical Field
The invention relates to the technical field of high-voltage direct-current transmission detection, in particular to an error-avoiding operation circuit and method for non-contact electrified detection of a protector.
Background
The converter transformer is a power transformer connected between a converter and an alternating current system, is a key device which is crucial in an ultrahigh voltage direct current transmission project, and is a core device of interfaces at two ends of rectification and inversion in the alternating current and direct current transmission system. The incoming line voltage of the converter transformer refers to the voltage of the converter transformer connected to an alternating current power grid (also called the grid side voltage of the converter transformer), and the direct current system realizes rectification and inversion and provides the voltage as a time reference for a specific logic operation and an outlet of the direct current control system by depending on the converter transformer.
If the incoming line voltage of the converter transformer is abnormal, the stable operation of the direct current system is affected, and the reasons for the abnormal incoming line voltage of the converter transformer are as follows: the fault of the alternating current system, the fault of the direct current system and the fault of the incoming line voltage measuring circuit of the converter transformer occur. The direct current blocking event caused by the fault of the converter transformer inlet line voltage measuring circuit occurs for many times in the network, and the main reason is that operation and maintenance personnel mistakenly break the circuit breaker F at intervals and the circuit breaker F is mistakenly broken due to the quality reason.
In the prior art, whether a converter transformer inlet line voltage measurement loop has a fault is judged only by simply converting a converter transformer inlet line voltage measurement value and combining a current amplitude value and a switching value, and only by increasing a virtual voltage value, the fault is remedied, referring to the invention patent of 'a virtual alternating voltage method (application number 201710949072.4) for preventing direct current locking caused by the abnormity of an alternating voltage measurement loop', the technical scheme of the invention cannot reflect an actual voltage value, and the problem of the stability of a direct current transmission system cannot be fundamentally solved.
Disclosure of Invention
The invention aims to provide an error-avoiding operation circuit and method for non-contact protector live-line detection, which aim to solve the technical defect that the stability of a direct-current power transmission system cannot be fundamentally solved only by increasing a virtual voltage value to remedy in the prior art.
The technical scheme of the invention is realized as follows:
the utility model provides a keep away maloperation circuit that is used for electrified detection of protector of non-contact which characterized in that: including the circuit breaker F that connects in the thread and its output of arbitrary two-phase voltage transformer who is connected and connect, the parallelly connected first relay K1 in circuit breaker F both ends, first relay K1 series connection resistance R1, the normally open node drive of first relay K1 connects warning circuit, warning circuit includes second relay K3, alarm, first power and second power, and the mains voltage of two powers is the same, and first power is established ties second relay K3 back and second power are parallelly connected, connect the both ends at above-mentioned parallel part after alarm and second relay K3's normally closed contact establish ties, the both ends of above-mentioned parallel part still respectively link through flexible conductor respectively has a wiring plug, the alarm include audible alarm and/or light alarm.
Preferably, each circuit breaker F is connected in series with a light emitting diode H1, a light emitting diode H2, and a light emitting diode H3, and each light emitting diode H1, a light emitting diode H2, and a light emitting diode H3 is connected in series with a voltage dividing resistor R2, a voltage dividing resistor R3, and a voltage dividing resistor R4.
Preferably, the reminding circuit further comprises a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are respectively connected with the central processing unit.
Preferably, the resistor R1 is connected in parallel with a switching diode D1, and the resistor R6 is connected in parallel with a switching diode D2.
Preferably, the first relay K1 is connected in series with a normally closed node SD and a normally closed node OF.
An anti-misoperation method for a secondary circuit of a converter transformer incoming line voltage transformer comprises the following steps:
1) two ends of a one-phase breaker F are taken as opening and entering signals, the breaker F is closed when a converter transformer normally operates, if the breaker F is tripped by mistake, a potential difference U exists at the two ends of the breaker F, the potential difference U drives a first relay K1 to be excited, a normally open node of a first relay K1 which is disconnected in a delayed mode is closed, the upper end and the lower end of the breaker F are communicated, a loop is continuously conducted, the normally open node of the first relay K1 is closed, the normally open node is closed, a switch K2 is driven to be disconnected, a reminding circuit is powered off and closed, a display unit is black, a wireless transmission unit outputs no data to a background, field operators and remote monitoring personnel are prompted to take measures, and the delayed closing time T of the normally open node of the first relay K1 is longer than 1 minute;
2) the normally closed node OF in the loop is an auxiliary contact OF the circuit breaker F, only indicates the position OF the circuit breaker F, and is closed when the circuit breaker F is disconnected; when the breaker F is closed, the normally-closed node OF is opened;
3) a normally closed node SD in the loop is an alarm node of the circuit breaker F, when the circuit breaker F has overload, short circuit and ground fault, the position of the normally closed node SD is reversed, and the error conduction of the anti-error loop is prevented when the circuit breaker F has overload, short circuit and ground fault;
4) a resistor R1 is connected in series in the loop to prevent the elements from being over-voltage, and a switch diode is connected in parallel at two ends of the resistor R1 to prevent the resistors from being short-circuited.
Compared with the prior art, the invention has the following beneficial effects:
according to the circuit and the method for avoiding the misoperation in the electrified detection of the non-contact protector, a visualization tool is added to a secondary circuit for measuring the voltage of the inlet wire of the converter transformer (voltage transformer), the visualization tool can be a display, the display is used for displaying environmental parameters in a power distribution room, when the breaker F is disconnected due to misoperation, the display is powered off and does not work, the black screen is used for reminding, the wireless transmission unit does not output data to a background, field operators and remote monitoring personnel are prompted to take measures, and the problem of the stability of a direct current transmission system is fundamentally solved.
Drawings
FIG. 1 is a circuit diagram of a circuit for avoiding erroneous operation of a non-contact protector during live-line detection according to the present invention;
FIG. 2 is a circuit diagram of the anti-misstep warning circuit of the circuit for preventing missteps of the non-contact protector for live detection according to the present invention;
FIG. 3 is a schematic block diagram of the alert circuit of the present invention.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.
As shown in fig. 1 to 3, an error operation avoiding circuit for detecting the electrification of a non-contact protector comprises a circuit breaker F connected in parallel with the output end of a voltage transformer connected with any two phases in a main line, the two ends of the breaker F are connected with a first relay K1 in parallel, the first relay K1 is connected with a resistor R1 in series, the normally open node of the first relay K1 is connected with a reminding circuit in a driving mode, the reminding circuit comprises a second relay K3100, an alarm 200, a first power supply 300 and a second power supply 400, the power supply voltages of the two power supplies are the same, the first power supply 300 is connected with the second relay K3100 in series and then connected with the second power supply 400 in parallel, the alarm 200 is connected with the normally closed contact of the second relay K3100 in series and then connected with the two ends of the parallel part, the two ends of the parallel part are respectively connected with a wiring plug 500 through flexible wires, the alarm 500 includes an audible alarm 510 and/or a light alarm 520. Each circuit breaker F is connected in series with a light emitting diode H1, a light emitting diode H2 and a light emitting diode H3, when the converter transformer normally operates, the light emitting diode H1, the light emitting diode H2 and the light emitting diode H3 flicker in a certain sequence, and can remind and warn operation and maintenance personnel who go wrong at intervals, and each light emitting diode H1, the light emitting diode H2 and the light emitting diode H3 are connected in series with a voltage dividing resistor R2, a voltage dividing resistor R3 and a voltage dividing resistor R4, and the resistance values of the voltage dividing resistor R2, the voltage dividing resistor R3 and the voltage dividing resistor R4 are matched with the corresponding light emitting diode, so that overvoltage of the lamp is prevented. The resistor R1 is connected in parallel with a switch diode Dz1, and the resistor R6 is connected in parallel with a switch diode Dz 2. The first relay K1 is connected in series with a normally closed node SD and a normally closed node OF.
An anti-misoperation method for a secondary circuit of a converter transformer incoming line voltage transformer comprises the following steps:
1) two ends of a one-phase breaker F are taken as opening and entering signals, the breaker F is closed when a converter transformer normally operates, if the breaker F is tripped by mistake, a potential difference U exists at the two ends of the breaker F, the potential difference U drives a first relay K1 to be excited, a normally open node of a first relay K1 which is disconnected in a delayed mode is closed, the upper end and the lower end of the breaker F are communicated, a loop is continuously conducted, the normally open node of the first relay K1 is closed, the normally open node is closed, a switch K2 is driven to be disconnected, a reminding circuit is powered off and closed, a display unit is black, a wireless transmission unit outputs no data to a background, field operators and remote monitoring personnel are prompted to take measures, and the delayed closing time T of the normally open node of the first relay K1 is longer than 1 minute;
2) the normally closed node OF in the loop is an auxiliary contact OF the circuit breaker F, only indicates the position OF the circuit breaker F, and is closed when the circuit breaker F is disconnected; when the breaker F is closed, the normally-closed node OF is opened;
3) a normally closed node SD in the loop is an alarm node of the circuit breaker F, when the circuit breaker F has overload, short circuit and ground fault, the position of the normally closed node SD is reversed, and the error conduction of the anti-error loop is prevented when the circuit breaker F has overload, short circuit and ground fault;
4) a resistor R1 is connected in series in the loop to prevent the elements from being over-voltage, and a switch diode is connected in parallel at two ends of the resistor R1 to prevent the resistors from being short-circuited.
According to the circuit structure and the principle of the invention, the misoperation avoiding circuit and the method for the non-contact protector electrification detection are characterized in that a visualization tool is added to a secondary circuit for measuring the voltage of the inlet wire of a converter transformer (voltage transformer), the visualization tool can be a display, the display is used for displaying environmental parameters in a power distribution room, when the breaker F is disconnected due to misoperation, the display cannot work due to power failure, the black screen is used for reminding, and the wireless transmission unit does not output data to the background, so that field operators and remote monitoring personnel are prompted to take measures, and the problem of the stability of a direct current transmission system is fundamentally solved.
Claims (6)
1. The utility model provides a keep away maloperation circuit that is used for electrified detection of protector of non-contact which characterized in that: including the circuit breaker F that connects in the thread and its output of arbitrary two-phase voltage transformer who is connected and connect, the parallelly connected first relay K1 in circuit breaker F both ends, first relay K1 series connection resistance R1, the normally open node drive of first relay K1 connects warning circuit, warning circuit includes second relay K3, alarm, first power and second power, and the mains voltage of two powers is the same, and first power is established ties second relay K3 back and second power are parallelly connected, connect the both ends at above-mentioned parallel part after alarm and second relay K3's normally closed contact establish ties, the both ends of above-mentioned parallel part still respectively link through flexible conductor respectively has a wiring plug, the alarm include audible alarm and/or light alarm.
2. The circuit for avoiding the misoperation of the non-contact protector in electrified detection as claimed in claim 1, wherein each circuit breaker F is connected in series with a light emitting diode H1, a light emitting diode H2 and a light emitting diode H3, and each light emitting diode H1, a light emitting diode H2 and a light emitting diode H3 are connected in series with a voltage dividing resistor R2, a voltage dividing resistor R3 and a voltage dividing resistor R4.
3. The circuit of claim 1, wherein the reminder circuit further comprises a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are respectively connected to the central processing unit.
4. The circuit for avoiding the misoperation of the charged detection of the non-contact protector as claimed in claim 1, 2 or 3, wherein the resistor R1 is connected in parallel with a switch diode D1, and the resistor R6 is connected in parallel with a switch diode D2.
5. The circuit for avoiding erroneous operation in electrified detection OF a non-contact type protector according to claim 1, wherein the first relay K1 is connected in series with a normally closed node SD and a normally closed node OF.
6. An anti-misoperation method for a secondary circuit of a converter transformer incoming line voltage transformer based on any one of claims 1-5 is characterized by comprising the following steps:
1) two ends of a one-phase breaker F are taken as opening and entering signals, the breaker F is closed when a converter transformer normally operates, if the breaker F is tripped by mistake, a potential difference U exists at the two ends of the breaker F, the potential difference U drives a first relay K1 to be excited, a normally open node of a first relay K1 which is disconnected in a delayed mode is closed, the upper end and the lower end of the breaker F are communicated, a loop is continuously conducted, the normally open node of the first relay K1 is closed, the normally open node is closed, a switch K2 is driven to be disconnected, a reminding circuit is powered off and closed, a display unit is black, a wireless transmission unit outputs no data to a background, field operators and remote monitoring personnel are prompted to take measures, and the delayed closing time T of the normally open node of the first relay K1 is longer than 1 minute;
2) the normally closed node OF in the loop is an auxiliary contact OF the circuit breaker F, only indicates the position OF the circuit breaker F, and is closed when the circuit breaker F is disconnected; when the breaker F is closed, the normally-closed node OF is opened;
3) a normally closed node SD in the loop is an alarm node of the circuit breaker F, when the circuit breaker F has overload, short circuit and ground fault, the position of the normally closed node SD is reversed, and the error conduction of the anti-error loop is prevented when the circuit breaker F has overload, short circuit and ground fault;
4) a resistor R1 is connected in series in the loop to prevent the elements from being over-voltage, and a switch diode is connected in parallel at two ends of the resistor R1 to prevent the resistors from being short-circuited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434758.8A CN114629104A (en) | 2020-12-10 | 2020-12-10 | Error-avoiding operation circuit and method for non-contact protector live-line detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434758.8A CN114629104A (en) | 2020-12-10 | 2020-12-10 | Error-avoiding operation circuit and method for non-contact protector live-line detection |
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| Publication Number | Publication Date |
|---|---|
| CN114629104A true CN114629104A (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011434758.8A Pending CN114629104A (en) | 2020-12-10 | 2020-12-10 | Error-avoiding operation circuit and method for non-contact protector live-line detection |
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| Country | Link |
|---|---|
| CN (1) | CN114629104A (en) |
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2020
- 2020-12-10 CN CN202011434758.8A patent/CN114629104A/en active Pending
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Effective date of registration: 20240429 Address after: 310000 No.3, gaoxinjiu Road, Qiaonan block, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Applicant after: Hangzhou taiweidun Intelligent Technology Co.,Ltd. Country or region after: China Address before: 310000 Tongyi village, Hezhuang street, dajiangdong industrial cluster, Hangzhou City, Zhejiang Province Applicant before: Hangzhou Fulaixing Technology Co.,Ltd. Country or region before: China |