CN114094538B - Power supply lightning protection device degradation protection switch device and method - Google Patents
Power supply lightning protection device degradation protection switch device and method Download PDFInfo
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- CN114094538B CN114094538B CN202111436857.4A CN202111436857A CN114094538B CN 114094538 B CN114094538 B CN 114094538B CN 202111436857 A CN202111436857 A CN 202111436857A CN 114094538 B CN114094538 B CN 114094538B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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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
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/027—Details with automatic disconnection after a predetermined time
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Electromagnetism (AREA)
Abstract
The invention relates to the field of lightning protection, in particular to a power supply lightning protection device degradation protection switch device and a method, comprising the following steps: the device comprises a micro-current sensor, an acquisition current judging module, a delay circuit and a switch control module; the invention avoids the defects of the traditional lightning protection switch and the trouble of selecting the type during installation, and can also test whether each component can work normally.
Description
Technical Field
The invention relates to the field of lightning protection, in particular to a power supply lightning protection device degradation protection switch device and a method.
Background
Along with the continuous construction of modern power systems, the integration degree of industries such as building electricity, railways, highways, telecommunications, electric power, petrochemical industry and the like is higher and higher, so that the problem of lightning protection of equipment is more and more important, and in order to protect the equipment from lightning current, a power supply is usually required to be additionally arranged in a power supply circuit of the equipment for lightning protection.
According to national standard (GB 50057-2010), a series protection switch device is arranged at the front end of the power lightning protector when the power lightning protector is installed, so that the power lightning protector cannot be separated from a circuit in time when the power lightning protector is aged and fails to work, explosion or spontaneous combustion accidents are caused, and the power lightning protector is convenient to maintain. The series protection switch device is selected according to the SPD current capacity, when the selected capacity is overlarge, when the power supply lightning protection device is short-circuited due to overlarge lightning current or aging, the circuit breaker or the fuse does not act, so that the power supply main circuit is idle to act first, and the power supply is influenced; when the selected capacity is too small, the fuse (or the breaker) is often opened during lightning strike, the protected equipment is damaged due to secondary lightning strike, and meanwhile, a plurality of troubles are caused for maintenance personnel.
In general, the front-end protection switching device of the power supply lightning protector is selected to meet the nominal current capacity parameter requirement of the power supply lightning protector, and meanwhile, the switching capacity in a power supply system is combined to prevent the power failure accident of aging and short circuit of the power supply lightning protector, so that the contradiction problem is caused when the protection switching device is selected.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, a protection switch device is difficult to select, has certain defects and cannot monitor a motor and a circuit board, and on one hand, the invention provides a power supply lightning protection device degradation protection switch device, and on the other hand, provides a use method of the power supply lightning protection device degradation protection switch device, which has the following specific technical scheme:
a power lightning protection device degradation protection switching device, comprising: the device comprises a micro-current sensor, an acquisition current judging module, a delay circuit and a switch control module;
the micro-current sensor is arranged in a front-end circuit of the power lightning protection device, the micro-current sensor is connected with the acquisition current judging module, the acquisition current judging module is connected with the delay circuit, and the delay circuit is connected with the switch control module;
the switch control module comprises a release electromagnetic coil driving module, a release electromagnetic coil, a switch on-off remote signaling contact and a switch linkage trip piece, wherein the delay circuit is connected with the release electromagnetic coil driving module, the release electromagnetic coil driving module is connected with the release electromagnetic coil, the switch linkage trip piece is arranged in a front-end circuit of the micro-current sensor, the switch on-off remote signaling contact is arranged at one end of the switch linkage trip piece, and the release electromagnetic coil is connected or disconnected with the switch linkage trip piece through electromagnetic force control.
Further, the collected current judging module is provided with a current threshold.
Further, the micro-current sensor, the acquisition current judging module, the delay circuit and the release electromagnetic coil driving module are all connected with a power supply.
Further, the delay circuit is provided with a time threshold.
Further, the switch linkage trip piece is connected with the switch on-off remote signaling contact when being tripped.
Further, the switch on-off remote signaling contact is connected with an alarm module, and the alarm module is one or more of an optical alarm module, an acoustic alarm module or a communication alarm module.
Further, the micro-current sensor further comprises a switch action test circuit, one end of the switch action test circuit is connected in the middle circuit of the micro-current sensor and the power lightning protection device, the other end of the switch action test circuit is connected with zero, and the switch action test circuit is sequentially connected with a test resistor and a switch action test button.
The invention also provides a using method of the power supply lightning protection device degradation protection switch device, which comprises the following steps:
s1, connecting a power supply lightning protection device degradation protection switching device into a front-end circuit of the power supply lightning protection device;
s2, the power supply lightning protection device degradation protection switch device works, a micro-current sensor samples current flowing through the power supply lightning protection device degradation protection switch device, and collected current signals are transmitted to a collected current judging module;
s3, comparing the acquired current signal with a current threshold value by the acquired current judging module, recognizing the current signal larger than the current threshold value as an abnormal current signal, and transmitting the abnormal current signal to the delay circuit;
s4, the delay circuit receives an abnormal current signal, compares the duration of the abnormal current signal with a time threshold, confirms that lightning is over-current when the duration is smaller than the time threshold, does not trigger the electromagnetic coil driving module of the release, confirms that the lightning protection device is degraded and leaked or short-circuited when the duration is larger than the time threshold, and triggers the electromagnetic coil driving module of the release;
s5, triggering the electromagnetic coil driving module of the release, obtaining driving electric energy by the electromagnetic coil of the release, providing thrust for the switch linkage release fastener, and releasing the switch linkage release fastener.
Further, the switch linkage tripping piece is disconnected and connected with the switch on-off remote signaling contact, and an alarm module in the switch on-off remote signaling contact gives an alarm in one or more of optical alarm, acoustic alarm or communication alarm.
Further, the method further comprises the following steps before the step S2:
the switch action test circuit tests the micro-current sensor, the acquisition current judging module, the delay circuit and the switch control module by pressing the switch action test button.
The beneficial effects of the invention are as follows:
1. according to the invention, the current threshold value is set in the collected current judging module, the collected current is preliminarily judged and checked to determine whether an abnormal current signal exists, the time threshold value is set in the delay circuit, the discovered abnormal current signal is further judged, the lightning stroke overcurrent and the lightning protection device degradation leakage current or short circuit are rapidly and effectively distinguished, and the lightning protection device degradation leakage current or short circuit is timely disconnected from the circuit when the lightning protection device degradation leakage current or short circuit is confirmed, so that the normal power supply is effectively ensured, and meanwhile, the maintenance of the power supply lightning protection device is facilitated;
2. the invention is only related to the through-flow capacity parameter of the lightning protection device, is irrelevant to the switching capacity in a power supply system, and avoids the defects of the traditional lightning protection device and the trouble of selection during installation;
3. the invention is provided with the switch action test circuit, and the micro-current sensor, the acquisition current judging module, the delay circuit and the switch control module can be tested whether to work normally by pressing the switch action test button, so that the device is convenient for subsequent staff to detect and maintain, and the accident rate is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Reference numerals:
1. a microcurrent sensor; 2. the acquisition current judging module; 3. a delay circuit; 4. a trip electromagnetic coil driving module; 5. a trip electromagnetic coil; 6. the switch is connected with a remote signaling contact; 7. the switch is linked to release the fastener; 8. a switch action test button; 9. testing resistance; 10. and a power supply.
Detailed Description
It will be apparent that the embodiments described below are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
A power lightning protection device degradation protection switching device, the protection switching device being connected in series in a front-end circuit of the lightning protection device, comprising: the micro-current sensor 1, the acquisition current judging module 2, the delay circuit 3 and the switch control module;
the micro-current sensor 1 is arranged in a front-end circuit of the power supply lightning protection device, the micro-current sensor 1 is connected with the acquisition current judging module 2, the acquisition current judging module 2 is connected with the delay circuit 3, and the delay circuit 3 is connected with the switch control module;
the switch control module comprises a release electromagnetic coil driving module 4, a release electromagnetic coil 5, a switch on-off remote signaling contact 6 and a switch linkage trip piece 7, wherein the delay circuit 3 is connected with the release electromagnetic coil driving module 4, the release electromagnetic coil driving module 4 is connected with the release electromagnetic coil 5, the switch linkage trip piece 7 is arranged in a front-end circuit of the micro-current sensor 1, the switch on-off remote signaling contact 6 is arranged at one end of the switch linkage trip piece 7, and the release electromagnetic coil 5 controls the connection or disconnection of the switch linkage trip piece 7 through electromagnetic force.
The micro-current sensor 1 utilizes a micro-current mutual inductance coil to sample a current signal flowing through a switch connecting wire, the current signal is transmitted to the acquisition current judging module 2, the acquisition current judging module 2 transmits the abnormal current signal to the delay circuit 3 for further judgment, the delay circuit 3 distinguishes lightning stroke overcurrent and lightning protector degradation leakage or short circuit, and when the lightning protector degradation leakage or short circuit is confirmed, the switch control module timely controls the switch linkage trip piece 7 to be tripped.
Further, the collected current judgment module 2 is provided with a current threshold.
The collected current judging module 2 compares and judges the current signal with a current threshold value, and the current signal exceeds the current threshold value to be regarded as an abnormal current signal.
Further, the micro-current sensor 1, the collected current judging module 2, the delay circuit 3 and the release electromagnetic coil driving module 4 are all connected with the power supply 10.
The current 10 provides working electric energy for the micro-current sensor 1, the acquisition current judging module 2, the delay circuit 3 and the release electromagnetic coil driving module 4.
Further, the delay circuit 3 is provided with a time threshold.
The time delay circuit compares and judges the duration time of the abnormal current signal with a time threshold value, wherein the time signal is smaller than the time threshold value and is regarded as lightning stroke overcurrent, and the time signal is larger than the time threshold value and is regarded as degradation leakage or short circuit of the lightning protection device.
Further, the switch linkage trip piece 7 is connected with the switch on-off remote signaling contact 6 when being tripped.
Further, the switch on-off remote signaling contact 6 is connected with an alarm module, and the alarm module is one or more of an optical alarm module, an acoustic alarm module or a communication alarm module.
The switch linkage trip piece 7 is connected with the switch on-off remote signaling contact 6 when being disconnected, the alarm module carries out alarm prompt, the light alarm module can take the form of a flashing lamp alarm and the like, the sound alarm module can take the form of a buzzing alarm and the like, and the communication alarm module can take the form of a terminal alarm and the like which is transmitted to a mobile phone and the like in a communication mode such as wireless transmission and the like.
Further, the micro-current sensor further comprises a switch action test circuit, one end of the switch action test circuit is connected in an intermediate circuit of the micro-current sensor 1 and the power lightning arrester, the other end of the switch action test circuit is connected with zero, and the switch action test circuit is sequentially connected with a test resistor 9 and a switch action test button 8.
By the aid of the switch action testing circuit, before the power supply lightning protection device is operated, components such as the micro-current sensor 1, the acquisition current judging module 2, the delay circuit 3 and the switch control module can be tested, and normal operation of the power supply lightning protection device is guaranteed.
The invention also provides a using method of the power supply lightning protection device degradation protection switch device, which comprises the following steps:
s1, connecting a power supply lightning protection device degradation protection switching device into a front-end circuit of the power supply lightning protection device;
s2, the power lightning protection device degradation protection switching device works, the micro-current sensor 1 samples the current flowing through the power lightning protection device degradation protection switching device and transmits the acquired current signal to the acquired current judging module 2;
s3, the collected current judging module 2 compares the collected current signal with a current threshold value, and recognizes the current signal larger than the current threshold value as an abnormal current signal and transmits the abnormal current signal to the delay circuit 3;
s4, the delay circuit 3 receives an abnormal current signal, compares the duration of the abnormal current signal with a time threshold, confirms that lightning is over-current when the duration is smaller than the time threshold, the release electromagnetic coil driving module 4 is not triggered, confirms that the lightning protection device is degraded and leaked or short-circuited when the duration is larger than the time threshold, and triggers the release electromagnetic coil driving module 4;
s5, triggering the release electromagnetic coil driving module 4, obtaining driving electric energy by the release electromagnetic coil 5, providing thrust for the switch linkage release piece 7, and releasing the switch linkage release piece 7.
Further, the switch linkage trip piece 7 is disconnected from and connected with the switch on-off remote signaling contact 6, and an alarm module in the switch on-off remote signaling contact 6 gives an alarm in one or more of light alarm, sound alarm or communication alarm.
Further, the method further comprises the following steps before the step S2:
the switch action test circuit tests the micro-current sensor 1, the acquisition current judging module 2, the delay circuit 3 and the switch control module by pressing a switch action test button.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. The application method of the power supply lightning protection device degradation protection switch device is characterized by comprising the following steps of: the method comprises the following steps:
s1, connecting a power supply lightning protection device degradation protection switching device into a front-end circuit of the power supply lightning protection device;
s2, the power supply lightning protection device degradation protection switch device works, a micro-current sensor samples current flowing through the power supply lightning protection device degradation protection switch device, and collected current signals are transmitted to a collected current judging module;
s3, comparing the acquired current signal with a current threshold value by the acquired current judging module, recognizing the current signal larger than the current threshold value as an abnormal current signal, and transmitting the abnormal current signal to the delay circuit;
s4, the delay circuit receives an abnormal current signal, compares the duration of the abnormal current signal with a time threshold, confirms that lightning is over-current when the duration is smaller than the time threshold, does not trigger the electromagnetic coil driving module of the release, confirms that the lightning protection device is degraded and leaked or short-circuited when the duration is larger than the time threshold, and triggers the electromagnetic coil driving module of the release;
s5, triggering the electromagnetic coil driving module of the release, obtaining driving electric energy by the electromagnetic coil of the release, providing thrust for the switch linkage release piece, and releasing the switch linkage release piece;
the micro-current sensor is connected with the acquisition current judging module, the acquisition current judging module is connected with the delay circuit, and the delay circuit is connected with the switch control module;
the switch control module comprises a release electromagnetic coil driving module, a release electromagnetic coil, a switch on-off remote signaling contact and a switch linkage trip piece, wherein the delay circuit is connected with the release electromagnetic coil driving module, the release electromagnetic coil driving module is connected with the release electromagnetic coil, the switch linkage trip piece is arranged in a front-end circuit of the micro-current sensor, the switch on-off remote signaling contact is arranged at one end of the switch linkage trip piece, and the release electromagnetic coil controls the connection or disconnection of the switch linkage trip piece through electromagnetic force;
the collected current judging module is provided with a current threshold value;
the delay circuit is provided with a time threshold;
the micro-current sensor, the acquisition current judging module, the delay circuit and the release electromagnetic coil driving module are all connected with a power supply;
the lightning protection device further comprises a switch action test circuit, one end of the switch action test circuit is connected in the middle circuit of the micro-current sensor and the power lightning protection device, the other end of the switch action test circuit is connected with zero, and the switch action test circuit is sequentially connected with a test resistor and a switch action test button.
2. The method of claim 1, wherein the microcurrent sensor, the acquisition current judging module, the delay circuit and the trip electromagnetic coil driving module are all connected with a power supply.
3. The method of claim 1, wherein the switch interlock release member is connected to the switch on-off remote signaling contact when disengaged.
4. The method of claim 3, wherein the switch on-off remote signaling contact is connected with an alarm module, and the alarm module is one or more of an optical alarm module, an acoustic alarm module or a communication alarm module.
5. The method of any one of claims 1-4, wherein the switch interlock trip is disconnected from the switch on-off remote signaling contact, and an alarm module in the switch on-off remote signaling contact alarms in one or more of an optical alarm, an acoustic alarm or a communication alarm.
6. The method of using a power lightning protection device degradation protection switching device according to claim 5, further comprising the step of, before step S2:
the switch action test circuit tests the micro-current sensor, the acquisition current judging module, the delay circuit and the switch control module by pressing the switch action test button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111436857.4A CN114094538B (en) | 2021-11-29 | 2021-11-29 | Power supply lightning protection device degradation protection switch device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111436857.4A CN114094538B (en) | 2021-11-29 | 2021-11-29 | Power supply lightning protection device degradation protection switch device and method |
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| Publication Number | Publication Date |
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| CN114094538A CN114094538A (en) | 2022-02-25 |
| CN114094538B true CN114094538B (en) | 2023-07-28 |
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| CN110829362A (en) * | 2019-11-08 | 2020-02-21 | 沈阳兴华航空电器有限责任公司 | Control circuit of overcurrent protection device and design method thereof |
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| JP5405433B2 (en) * | 2010-10-26 | 2014-02-05 | 中国電力株式会社 | Arrestor deterioration diagnosis device and deterioration diagnosis method |
| CN202772568U (en) * | 2012-09-12 | 2013-03-06 | 南京普天鸿雁电器科技有限公司 | Lightning protection module |
| CN107809103B (en) * | 2016-09-08 | 2019-12-06 | 浙江正泰电器股份有限公司 | Lightning protection type residual current operated circuit breaker |
| CN110912101B (en) * | 2019-11-26 | 2022-01-04 | 乐清市贝加尔电子科技有限公司 | Non-contact passive SPD backup protection circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007129871A (en) * | 2005-11-07 | 2007-05-24 | Morinaga Denshi Kk | Controller for decoupling of arrester |
| JP2008270135A (en) * | 2007-04-25 | 2008-11-06 | Mitsubishi Electric Corp | Circuit breaker, and spd protection system using the same |
| CN102798786A (en) * | 2012-09-10 | 2012-11-28 | 天津协盛闪宁科技有限公司 | Universal intelligent lightning protection monitoring module and method |
| CN110829362A (en) * | 2019-11-08 | 2020-02-21 | 沈阳兴华航空电器有限责任公司 | Control circuit of overcurrent protection device and design method thereof |
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| CN114094538A (en) | 2022-02-25 |
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