CN108963972B - Alternating current leakage protection circuit with intelligent recovery function - Google Patents
Alternating current leakage protection circuit with intelligent recovery function Download PDFInfo
- Publication number
- CN108963972B CN108963972B CN201810868348.0A CN201810868348A CN108963972B CN 108963972 B CN108963972 B CN 108963972B CN 201810868348 A CN201810868348 A CN 201810868348A CN 108963972 B CN108963972 B CN 108963972B
- Authority
- CN
- China
- Prior art keywords
- switch
- detection
- alternating current
- control
- output bus
- 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.)
- Active
Links
Images
Classifications
-
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/325—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors involving voltage comparison
-
- 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
-
- 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
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
Abstract
The invention provides an alternating current leakage protection circuit with an intelligent recovery function, which comprises a control board, an input switch, an auxiliary power supply switch, a detection switch and a detection resistor, wherein the control board is connected with the input switch; the input switch is a switch with a leakage protection function; the auxiliary power supply outputs a direct current voltage signal; the control panel is provided with an input control interface, a detection control interface and a sampling interface, the input control interface is connected to the input switch to control the on-off of the input switch, the detection control interface is connected to the detection switch and the auxiliary power switch to control the on-off of the detection switch and the auxiliary power switch, and the sampling interface is connected to the alternating current output bus to collect a voltage signal of the alternating current output bus; the detection resistor is connected to the AC output bus via the detection switch. The invention supports the function of intelligently recovering the alternating current leakage protection through intelligent control, and creates conditions for fundamentally solving the problem of high maintenance difficulty after the charging pile is subjected to leakage fault protection.
Description
Technical Field
The invention relates to the field of alternating current leakage protection, in particular to an alternating current leakage protection circuit with an intelligent recovery function.
Background
Along with the rapid development of new energy automobile market scale, the demand of filling electric pile also promotes by a wide margin. Relevant policies are issued in various countries in the global market, and the construction of charging piles is accelerated. The charging pile works in an outdoor environment with high temperature, low temperature and complex power supply condition and works continuously for 24 hours. This kind of abominable outdoor operational environment causes very easily to fill electric pile input circuit breaker electric leakage tripping, and the electric pile electric leakage tripping that has filled in the existing market needs artificial recovery at present. However, charging pile installation points are scattered, such as: in different places such as streets, roadsides, public transportation stations, underground garages and the like, the maintenance mode that the leakage tripping operation needs to be manually recovered increases great difficulty for maintenance work.
In order to solve the problems of high leakage tripping fault rate and high maintenance difficulty of the unattended charging pile, the alternating current leakage protection equipment with the intelligent recovery function is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an alternating current leakage protection circuit with an intelligent recovery function, which can intelligently judge whether the leakage fault is eliminated or not and automatically recover an alternating current power supply loop after the alternating current leakage fault is eliminated under the condition of tripping of the alternating current leakage fault. Therefore, the invention adopts the following technical scheme:
an alternating current leakage protection circuit with an intelligent recovery function is characterized by comprising a control board, an input switch, an auxiliary power supply switch, a detection switch and a detection resistor; the input switch is a switch with a leakage protection function; the auxiliary power supply outputs a direct current voltage signal;
the control panel is provided with an input control interface, a detection control interface and a sampling interface, the input control interface is connected to the input switch to control the on-off of the input switch, the detection control interface is connected to the detection switch and the auxiliary power switch to control the on-off of the detection switch and the auxiliary power switch, and the sampling interface is connected to the alternating current output bus to collect a voltage signal of the alternating current output bus; the detection resistor is connected to the AC output bus via the detection switch.
The control panel captures a leakage fault signal through a sampling interface; connecting an auxiliary power supply to an alternating current output bus by controlling an auxiliary power supply switch; the control board controls the detection switch and connects the detection resistor to the AC output bus; the control panel acquires different voltage signals on the alternating current output bus through different combinations of the actions of the detection switches; the control board analyzes whether the leakage fault is eliminated or not through intelligent operation according to the acquired voltage signal so as to decide whether to close the input switch again or not.
Preferably, the device is provided with two groups of detection resistors connected in parallel, and the detection resistors respectively detect different alternating current buses through detection switches.
Preferably, the input control interface and the detection control interface of the control board output passive switch signals, and the passive switch signals have an open state and a closed state.
Preferably, the control panel collects alternating current output bus voltage signals and judges the leakage fault state in real time.
Preferably, when the control board detects that the leakage fault occurs, the control board automatically controls the auxiliary power switch to connect the auxiliary power to the ac output bus.
Preferably, after the control panel connects the auxiliary power supply to the ac output bus, the control panel controls the on/off of the detection switch to connect and disconnect the detection resistor and the ac output bus.
Preferably, the control panel detects the switching action and simultaneously collects the voltage signal of the alternating current output bus in real time.
Preferably, the control panel has intelligent operation, control function, through control detection switch action and the voltage signal of gathering the alternating current bus, whether the electric leakage fault touch source of assay on the alternating current output bus is got rid of.
Preferably, the control board automatically decides whether to close the input switch according to whether the leakage fault source is eliminated.
Preferably, before the control panel closes the input switch again, the auxiliary power switch and the detection switch are opened.
In the invention, the input switch can be switched on and off by the output signal of the control interface, and the auxiliary power switch and the detection switch can be switched on and off by the output signal of the detection control interface. The invention supports the function of intelligently recovering the alternating current leakage protection through intelligent control, and creates conditions for fundamentally solving the problem of high maintenance difficulty after the charging pile is subjected to leakage fault protection. When the load end takes place the electric leakage trouble, input switch relies on the earth leakage protection function of self, automatic disconnection, the sampling interface of control panel is through the voltage signal of gathering AC output bus, catch the electric leakage trouble and take place the signal, then, can be by control panel control auxiliary power switch, detect switch's closure, the disconnection action, and simultaneously, gather AC output bus's voltage signal, judge the electric leakage fault state of load end in real time, after judging load end electric leakage trouble and removing, control panel control input switch is closed, realize that AC supply circuit mistakenly recognizes the local direct automatic recovery power supply of guard, remove the trouble of dispatcher's field maintenance from.
Drawings
Fig. 1 is a schematic diagram illustrating an ac leakage protection circuit with an intelligent recovery function according to the present invention.
Fig. 2 is a circuit diagram of the input control interface and the detection control interface of the control board according to the present invention.
Fig. 3 is a circuit diagram of a sampling interface of the control board of the present invention.
Detailed Description
The following embodiments are provided to illustrate the present invention, but are not intended to limit the scope of the present invention.
As shown in fig. 1, an ac leakage protection circuit with an intelligent recovery function according to the present invention includes: an input switch P0; control panel P2; an input control interface P1 on the control board; a detection control interface P3 and a sampling interface P4 on the control board; detection switches P5, P8; detection resistances P6, P7; an auxiliary power switch P10; an auxiliary power supply P11.
The input switch P0 has an ac leakage protection function, and a common breaker having a leakage protection function can be selected.
The control panel P2 is provided with a controller, which can be a common single chip microcomputer or a common microprocessor, such as STM32F103VCT6 of ST company.
As shown in fig. 2, the input control interface P1 and the detection control interface P3 on the control board P2 may adopt a common relay control circuit: r1 is a control current limiting resistor; q1 is a triode; RLY1 is a relay. The input control signal controls the on-off of the triode Q1, indirectly controls the power supply of the coil of the relay RLY1, and further controls the on-off of the contact of the relay RLY 1.
As shown in fig. 3, the sampling interface P4 on the control board P2 can sample a common resistance voltage division sampling circuit: r2 and R3 are divider resistors. The ratio of the input voltage VIN to the output voltage VOUT is determined by R2 and R3.
The auxiliary power switch P10, the detection switches P5, P8 may be ordinary electromagnetic relays.
The detection resistors P6 and P7 can adopt common plug-in resistors. One ends of P6 and P7 are connected to a common end PE1, and the other ends are connected to output buses L1 and N1 through detection switches P5 and P8 respectively.
The operation of an ac leakage protection circuit with an intelligent recovery function according to the present invention will be described.
The input switch P0 is closed, the alternating current input L0/N0/PE0 is connected to the output bus L1/N1/PE1, when the load P9 has a leakage fault, the input switch P0 is automatically opened, and the alternating current output bus L1/N1/PE1 is in a power-off state. The control board P2 collects the voltage signal through the sampling interface P4, and captures the disconnection signal of the input switch P0 through operation and analysis. The control board P2 connects the auxiliary power supply P11 to the ac output bus L1/N1/PE1 by controlling the auxiliary power switch P10, and starts to detect the leakage fault condition of the load P9, and the specific operation process is as follows: the control board P2 closes the detection switch P5 through the detection control interface P3 first, the first group of voltage signals are collected through the sampling interface P4, then, the control board P2 closes the detection switch P8 and opens the detection switch P5 through the detection control interface P3, the second group of voltage signals are collected through the sampling interface P4, the control board P2 judges whether the leakage fault on the output bus L1/N1/PE1 is eliminated or not according to the two groups of collected voltage signals and the collected voltage signals in combination with kirchhoff voltage and current law. If the leakage fault is eliminated, the control board P2 controls the input switch P0 to be closed, and the AC input bus L0/N0/PE0 is reconnected to the AC output bus L1/N1/PE 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications, combinations, and alterations may occur to those skilled in the art. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. An alternating current leakage protection circuit with an intelligent recovery function is characterized by comprising a control board, an input switch, an auxiliary power supply switch, a detection switch and a detection resistor; the input switch is a switch with a leakage protection function; the auxiliary power supply outputs a direct current voltage signal;
the control panel is provided with an input control interface, a detection control interface and a sampling interface, and the input control interface is connected to the input switch and controls the on-off of the input switch; the detection control interface is connected to the detection switch and the auxiliary power switch to control the on-off of the detection switch and the auxiliary power switch, and the sampling interface is connected to the alternating current output bus to collect a voltage signal of the alternating current output bus; two groups of detection resistors are connected to an alternating current output bus by controlling the on-off of a detection switch, and the change conditions of two groups of voltage signals on the output bus are collected at the same time, so that the judgment on whether the leakage fault is eliminated is completed;
when the control board detects that the electric leakage fault occurs and the input switch is disconnected, the control board controls the auxiliary power switch to be closed, and the auxiliary power is connected to the alternating current output bus.
2. The ac leakage protection circuit with intelligent recovery function as claimed in claim 1, wherein said control board input control interface and detection control interface output passive switching signals having two states of open and closed.
3. The alternating current leakage protection circuit with the intelligent recovery function as claimed in claim 1, wherein after the control board connects the auxiliary power supply to the alternating current output bus, the control board controls on and off of the detection switch to realize connection and disconnection of the detection resistor and the alternating current output bus.
4. The AC leakage protection circuit with intelligent recovery function as claimed in claim 1, wherein said control board collects voltage signal on AC output bus in real time while controlling detection switch action.
5. The alternating current leakage protection circuit with the intelligent recovery function as claimed in claim 1, wherein the control board has the functions of intelligent operation and control, and by controlling the detection switch and collecting the voltage signal on the alternating current output bus, whether the leakage fault on the alternating current output bus is eliminated is analyzed, and whether the input switch is closed is determined.
6. The ac leakage protection circuit with intelligent recovery function as claimed in claim 1, wherein the control board must open the auxiliary power switch and the detection switch before automatically closing the input switch.
7. An AC leakage protection circuit with intelligent recovery function according to claim 1, wherein it is provided with two sets of detection resistors connected in parallel to detect different AC buses respectively via detection switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868348.0A CN108963972B (en) | 2018-08-02 | 2018-08-02 | Alternating current leakage protection circuit with intelligent recovery function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868348.0A CN108963972B (en) | 2018-08-02 | 2018-08-02 | Alternating current leakage protection circuit with intelligent recovery function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108963972A CN108963972A (en) | 2018-12-07 |
| CN108963972B true CN108963972B (en) | 2020-02-18 |
Family
ID=64465751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810868348.0A Active CN108963972B (en) | 2018-08-02 | 2018-08-02 | Alternating current leakage protection circuit with intelligent recovery function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108963972B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531211B (en) * | 2019-10-09 | 2021-10-29 | 青岛鼎信通讯股份有限公司 | Circuit scheme for alternating current/direct current leakage detection system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100593275C (en) * | 2006-09-12 | 2010-03-03 | 深圳Tcl新技术有限公司 | Power factor correction circuit |
| CN204068405U (en) * | 2014-07-15 | 2014-12-31 | 沈亚斌 | The earth leakage protective DC power-supply system of a kind of band |
| CN106655487B (en) * | 2016-09-28 | 2018-07-20 | 国网山东省电力公司梁山县供电公司 | A kind of comprehensive early warning of distribution network intelligent and safe and control system |
| CN106329471A (en) * | 2016-10-20 | 2017-01-11 | 常州尼诺光电科技有限公司 | Automatic restorable leakage protection circuit breaker and working method thereof |
| CN106711937B (en) * | 2016-12-26 | 2019-05-07 | 浙江万马新能源有限公司 | A kind of alternating-current charging pile A type leakage protection circuit |
| CN206401964U (en) * | 2017-01-09 | 2017-08-11 | 深圳市深泰明科技有限公司 | A kind of alternating-current charging pile controller and alternating-current charging pile control system |
-
2018
- 2018-08-02 CN CN201810868348.0A patent/CN108963972B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108963972A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203444081U (en) | Monitoring and control system for permanent magnetic mechanism breaker | |
| CN108909494B (en) | Charging system and electric automobile | |
| CN101420116B (en) | Intelligent integrated electricity leakage protection device | |
| CN107438929B (en) | Method for being protected in combined power transmission line | |
| CN104377816A (en) | Intelligent reclosure breaker and automatic reclosure control method thereof | |
| CN107508264B (en) | A kind of site route protection does not have a power failure drive method | |
| CN101980419B (en) | Automatic control device for vacuum circuit breaker on electric distribution network | |
| CN110794293A (en) | Method for detecting automatic nuclear capacity switch state of storage battery | |
| CN103618377A (en) | Automatic bus transfer equipment system and automatic bus transfer method used for transformer substation to which small power supply is connected | |
| CN203398755U (en) | Three-phase earth leakage protection and power-off automatic recovery apparatus | |
| CN105978148A (en) | Domestic intelligent power distribution safety system with remote monitoring function, and remote monitoring method therefor | |
| CN101789580A (en) | Fault detection and protection method of power-supply system and device for realizing same | |
| CN108963972B (en) | Alternating current leakage protection circuit with intelligent recovery function | |
| CN103018621A (en) | Direct current insulation monitoring module based on 24V power system and achieving method thereof | |
| KR102034675B1 (en) | An apparatus and method for circuit breaker restoring by power failure detection remotely for battery charging system of electric vehicle | |
| CN102508155B (en) | Test circuit for internally installed load switch of intelligent electric energy meter | |
| CN104485642A (en) | Open-phase protection circuit composed of voltage comparators | |
| CN109119975A (en) | A kind of failure protection method of the breaker of direct current system and its start-up course | |
| CN204258436U (en) | A kind of intelligentized reclosing breaker | |
| CN207234401U (en) | A kind of accumulation power supply system | |
| CN203800556U (en) | Microcomputer protection device exit relay drive circuit | |
| CN202488093U (en) | Electric leakage discriminating protection device for detecting ground wire leakage current | |
| CN106908686A (en) | Single-phase grounded malfunction in grounded system of low current reliability judgment means based on asymmetric method | |
| CN200941546Y (en) | On-line line selection protector of single-phase earthing fault | |
| CN205753005U (en) | A kind of auxiliary circuits in cabinet monitoring device |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200123 Address after: No. 69 Hangzhou City, Zhejiang province 310053 High-tech Zone of Jiangsu Science and Technology Industrial Park, Eastcom Avenue Applicant after: HANGZHOU ELECTRIC Co.,Ltd. Applicant after: Beijing Join Bright Electric Power Technology Co., Ltd. Address before: No. 69 Hangzhou City, Zhejiang province 310053 High-tech Zone of Jiangsu Science and Technology Industrial Park, Eastcom Avenue Applicant before: HANGZHOU ELECTRIC Co.,Ltd. |
|
| TA01 | Transfer of patent application right |