CN106451745B - Automatic switching system for relay protection outlet loop - Google Patents
Automatic switching system for relay protection outlet loop Download PDFInfo
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- CN106451745B CN106451745B CN201610905357.3A CN201610905357A CN106451745B CN 106451745 B CN106451745 B CN 106451745B CN 201610905357 A CN201610905357 A CN 201610905357A CN 106451745 B CN106451745 B CN 106451745B
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- relay protection
- protection device
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
Abstract
The invention discloses an automatic switching system of a relay protection outlet loop, which is characterized in that a switching device, a first relay protection device, a second relay protection device, a third relay protection device and a breaker mechanism are arranged, the switching device is used for judging which relay protection device operating power supply is to be connected into the breaker mechanism through an operating loop, and because a normally closed contact of a voltage relay is connected in series in the operating loop, only one set of relay protection device operating power supply is connected into the breaker mechanism.
Description
Technical Field
The invention relates to the field of power relay protection, in particular to an automatic switching system of a relay protection outlet loop.
Background
In recent years, with the rapid development of power grid construction, the number of substations is rapidly increased, the number of relay protection newly-entered personnel is gradually increased, meanwhile, as the requirement on power grid equipment maintenance is improved, the requirement on training of relay protection personnel is higher, and the requirement needs to be closer to equipment daily maintenance equipment for training, most of relay protection training works at present use analog circuit breakers, few practical circuit breakers are used for training, few sets of protection simultaneously use one circuit breaker, when different relay protection devices are required for transmission, manual rewiring is often adopted for realization, when different relay protection devices need to be exported for transmission and only one circuit breaker is actually adopted, manual rewiring is required for realization, and meanwhile, as the personnel participating in training are newly-entered staff, the circuit is not familiar, the incomplete circuit modification is often caused, so that the mutual series connection or incomplete wiring of different control power supplies can not be realized, and transmission cannot be realized due to the fact that the circuit modification is incomplete
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an automatic switching system for relay protection outlet circuit, which automatically switches operating power supplies and prevents the operating power supplies of different protection devices from being connected in series.
The technical scheme provided by the invention is as follows: the utility model provides a relay protection outlet circuit automatic switching system, includes auto-change over device and first relay protection device, second relay protection device, third relay protection device and circuit breaker mechanism that are independent loop connection respectively with the auto-change over device to and the control backstage of monitoring switching state, be provided with control module in the auto-change over device, first relay protection device, second relay protection device and third relay protection device with be provided with first control circuit, second control circuit and third control circuit between the control module respectively, first relay protection device, second relay protection device and third relay protection device with still be provided with first voltage detection circuit, second voltage detection circuit and third voltage detection circuit between the control module respectively, first relay protection device, second relay protection device and third relay protection device all through the circuit with circuit breaker mechanism connects, control module with be provided with operation circuit between the circuit breaker mechanism, control module basis first voltage detection circuit or second voltage detection circuit or third voltage detection circuit detect whether there is feedback that the voltage detects the circuit and come to judge to first relay protection device or second relay protection device or third relay protection device's relay protection operation circuit is switched on to first relay protection device or second relay protection device's relay protection operation circuit or third relay protection device's relay protection operation instruction makes relay protection switch on.
In a preferred embodiment of the present invention, a voltage relay is disposed on the operation circuit, and a normally closed contact of the voltage relay is connected in series in a circuit in the operation circuit that conducts the first relay protection device, the second relay protection device, or the third relay protection device, so that two power supplies from the first relay protection device, the second relay protection device, or the third relay protection device cannot exist in the operation circuit and are simultaneously connected to the circuit breaker mechanism.
In a preferred embodiment of the present invention, the first voltage detection circuit, the second voltage detection circuit and the third voltage detection circuit are all provided with an optocoupler relay.
In a preferred embodiment of the present invention, photo MOS relays are disposed on the first control loop, the second control loop and the third control loop.
In a preferred embodiment of the present invention, the monitoring system further includes a measurement and control device, connected between the first control loop, the second control loop, and the third control loop and the monitoring background, for transmitting the switching conduction signals of the first control loop, the second control loop, and the third control loop to the monitoring background.
In a preferred embodiment of the present invention, the measurement and control device is further provided with three indicator lights, the three indicator lights are respectively electrically connected to the conduction loops of the first relay protection device, the second relay protection device, and the third relay protection device, and when the first relay protection device, the second relay protection device, or the third relay protection device is conducted, the corresponding indicator light is turned on.
In a preferred embodiment of the present invention, the indicator light is provided as a light emitting diode, and the light emitting diode is electrically connected to the photo MOS relay.
In a preferred embodiment of the present invention, the control module is configured as a single chip.
In a preferred embodiment of the present invention, the switching device further includes a power module.
The invention has the following beneficial effects: the relay protection outlet loop automatic switching system judges whether to send a conducting control instruction to a corresponding first relay protection device, a second relay protection device or a third relay protection device by setting a switching device, the first relay protection device, the second relay protection device, the third relay protection device and a circuit breaker mechanism according to the feedback of whether the first voltage detection loop, the second voltage detection loop or the third voltage detection loop detects voltage, so that an operating power supply of the conducted first relay protection device, the second relay protection device or the third relay protection device is connected to the circuit breaker mechanism through the operating loop.
Drawings
Fig. 1 is a system contact diagram of an automatic switching system of a relay protection outlet loop in the invention;
fig. 2 is a module contact diagram of a switching device in the automatic switching system of the relay protection outlet circuit according to the present invention;
fig. 3 is a control circuit diagram between a switching device and a relay protection device in the automatic switching system of the relay protection outlet circuit in the invention;
fig. 4 is a wiring diagram in the relay protection device in the automatic switching system of the relay protection outlet circuit in the invention;
fig. 5 is a diagram of a voltage detection circuit between a switching device and a relay protection device in the automatic switching system of the relay protection outlet circuit of the present invention;
fig. 6 is a circuit diagram of a single chip microcomputer in the automatic switching system of the relay protection outlet circuit in the invention.
Detailed Description
Referring to fig. 1 to 6, an automatic switching system of a relay protection outlet loop comprises a switching device, a first protection device (first relay protection device), a second protection device (first relay protection device), a third protection device (first relay protection device) and a circuit breaker mechanism, wherein the first protection device (first relay protection device), the second protection device (first relay protection device) and the circuit breaker mechanism are respectively connected with the switching device in an independent loop, and a monitoring background for monitoring the switching state, a control module (a single chip in fig. 2) is arranged in the switching device, a power module (as shown in fig. 2) is also arranged in the switching device, a first control circuit, a second control circuit and a third control circuit are respectively arranged among the first protection device, the second protection device, the third protection device and the control module, optical MOS relays are respectively arranged on the first control circuit, the second control circuit and the third control circuit, a first voltage detection circuit, a second voltage detection circuit and a third voltage detection circuit are respectively arranged among the first protection device, the second protection device, the third protection device and the control module, optical coupling relays are respectively arranged on the first voltage detection circuit, the second voltage detection circuit and the third voltage detection circuit, the first protection device, the second protection device and the third protection device are respectively connected with a circuit breaker mechanism through circuits, an operation circuit is arranged between the control module and the circuit breaker mechanism, and the control module judges whether the protection device or the second protection device is conducted to the corresponding protection device according to the feedback that the detection voltage of the first voltage detection circuit or the second voltage detection circuit or the third voltage detection circuit is detected, thereby, the operation power supply of the conducted protection device I or protection device II or protection device III is connected into the circuit breaker mechanism through the operation loop. A voltage relay is arranged on the operation loop, and a normally closed contact of the voltage relay is connected in series in the operation loop to conduct a loop of the protection device I or the protection device II or the protection device III, so that two paths of power supplies from the protection device I or the protection device II or the protection device III cannot be connected into the circuit breaker mechanism simultaneously in the operation loop. The monitoring device is connected among the first control loop, the second control loop, the third control loop and the monitoring background and used for transmitting switching conduction signals of the first control loop, the second control loop and the third control loop to the monitoring background, three indicating lamps (not shown) are further arranged on the monitoring device and are respectively and electrically connected to the conduction loops of the first protection device, the second protection device and the third protection device, when the first protection device, the second protection device or the third protection device are conducted, the corresponding indicating lamps are turned on, the indicating lamps are set to be light-emitting diodes, and the light-emitting diodes are electrically connected with the light MOS relay.
Specifically, referring to fig. 1, in the automatic switching system of the relay protection outlet loop, three protection device (a protection device i, a protection device ii, and a protection device iii) operation loops are connected to an automatic switching device, only one group of operation loops are connected to a circuit breaker operation mechanism after switching, and the connection condition of the three protection devices is sent to a monitoring background through a measurement and control device.
Referring to fig. 2, the connection of each module in the switching device is as shown in fig. 2, the operation loop of the protection device is connected to the front end of the intermediate relay and is provided with a potential detection loop, each intermediate relay is also provided with a control loop and a voltage relay after switching, only when the voltage relay does not have voltage after switching and only one group of operation loops have voltage in the front end of the intermediate relay are from absent to present, the single chip sends out an instruction to turn on the relay when the voltage at the front end of the relay is from present to absent, and the single chip sends out an instruction to turn off the relay, so that the automatic switching on and off of the operation power supplies of different protection devices are realized.
Referring to fig. 3, the control circuit of the relay is as shown in fig. 3, because the normally closed contact of the voltage relay is connected in series in the circuit for conducting the relay, when the voltage exists at the rear end of the relay, the normally closed contact is disconnected, so that when one protection device is already supplied with the operating power supply, and another protection device is supplied with the power supply again, the relay is not conducted, and the two groups of operating power supplies are prevented from being connected in series.
Referring to fig. 4, each contact of the intermediate relay is as shown in fig. 4, when the contact 1 receives a signal of a single chip microcomputer, the contacts 3-4, 5-6, 9-10 and 11-12 of the relay are closed, the operation loop is conducted to the circuit breaker at the moment, meanwhile, the contacts 7-8 are closed, an action signal is sent to a monitoring background through the measurement and control device, and when the contact 13 of the intermediate relay receives a signal of the single chip microcomputer, all the contacts are disconnected.
Referring to fig. 5, the voltage detection circuit is as shown in fig. 5, the voltage difference between 1 and 2 in the operation circuit is switched into the single chip microcomputer through the optical coupling relay, and when positive electricity is switched on, the voltage of the circuit is judged.
Referring to fig. 6, the open circuit of the single chip microcomputer is as shown in fig. 6, when the single chip microcomputer is opened, the + and-contacts of the light emitting diode of the optical MOS relay are closed when the light emitting diode emits light, and the contacts are used for controlling the contact relay.
In summary, the automatic switching system of the relay protection outlet loop comprises a switching device, three sets of relay protection devices and a circuit breaker mechanism, wherein the switching device is used for judging which set of operating power supply of the relay protection device is to be connected into the circuit breaker mechanism through an operating loop, and a normally closed contact of a voltage relay is connected in series in the operating loop, so that only one set of operating power supply of the relay protection device is connected into the circuit breaker mechanism at the same time.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (9)
1. An automatic switching system of a relay protection outlet loop is characterized by comprising a switching device, a first relay protection device, a second relay protection device, a third relay protection device and a circuit breaker mechanism which are respectively connected with the switching device in an independent loop, and a monitoring background for monitoring a switching state, wherein a control module is arranged in the switching device, a first control loop, a second control loop and a third control loop are respectively arranged between the first relay protection device, the second relay protection device and the third relay protection device and the control module, a first voltage detection loop, a second voltage detection loop and a third voltage detection loop are respectively arranged between the first relay protection device, the second relay protection device and the third relay protection device and the control module, the first relay protection device, the second relay protection device and the third relay protection device are all connected with the circuit breaker mechanism through a circuit, an operation loop is arranged between the control module and the circuit breaker mechanism, and the control module judges whether the relay protection device is switched on or not through a power supply feedback instruction of the first relay protection device or the third relay protection device corresponding to the circuit breaker mechanism according to the first relay protection device or the second relay protection device, and the second relay protection device or the third relay protection device is switched on or the second relay protection device through the power supply feedback instruction;
the operation loops are connected to the switching device, and only one group of operation loops are connected with the circuit breaker mechanism after switching; the operation circuit is connected to the front end of the intermediate relay and is provided with a potential detection circuit, each intermediate relay is also provided with a control circuit and a voltage relay after switching, only when the voltage relay does not have voltage after switching and only one group of operation circuits at the front end of the intermediate relay have voltage from the non-existent to the existent, the single chip can send an instruction to switch on the relay when sending the instruction, and when the voltage at the front end of the relay is from the existent to the non-existent, the single chip can send the instruction to switch off the relay, so that the automatic switching-in and the automatic switching-out of the operation power supplies of different protection devices can be realized;
and a normally closed contact of a voltage relay is connected in series in a conducting loop of the control loop of the relay.
2. The automatic switching system of the relay protection outlet circuit according to claim 1, wherein: the circuit breaker mechanism is characterized in that a voltage relay is arranged on the operation loop, a normally closed contact of the voltage relay is connected in series to be conducted in the operation loop in the loop of the first relay protection device, the second relay protection device or the third relay protection device, and therefore the circuit breaker mechanism cannot be accessed by two paths of power supplies of the first relay protection device, the second relay protection device or the third relay protection device.
3. The automatic switching system of the relay protection outlet circuit according to claim 1, wherein: and optocoupler relays are arranged on the first voltage detection loop, the second voltage detection loop and the third voltage detection loop.
4. The automatic switching system of the relay protection outlet circuit according to claim 1, wherein: and the first control circuit, the second control circuit and the third control circuit are all provided with light MOS relays.
5. The automatic switching system of the relay protection outlet circuit according to claim 4, wherein: the monitoring system further comprises a measurement and control device, wherein the measurement and control device is connected between the first control loop, the second control loop and the third control loop and the monitoring background and used for transmitting switching conduction signals of the first control loop, the second control loop and the third control loop to the monitoring background.
6. The automatic switching system of relay protection outlet loop according to claim 5, wherein: the measurement and control device is further provided with three indicator lamps, the three indicator lamps are respectively electrically connected to the conduction loops of the first relay protection device, the second relay protection device and the third relay protection device, and when the first relay protection device or the second relay protection device or the third relay protection device are conducted, the corresponding indicator lamps are turned on.
7. The automatic switching system of the relay protection outlet circuit according to claim 6, wherein: the indicator light is set to be a light emitting diode, and the light emitting diode is electrically connected with the optical MOS relay.
8. The automatic switching system of the relay protection outlet circuit according to claim 1, wherein: the control module is set as a single chip microcomputer.
9. The automatic switching system of the relay protection outlet circuit according to claim 1, wherein: the switching device also comprises a power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905357.3A CN106451745B (en) | 2016-10-18 | 2016-10-18 | Automatic switching system for relay protection outlet loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905357.3A CN106451745B (en) | 2016-10-18 | 2016-10-18 | Automatic switching system for relay protection outlet loop |
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| Publication Number | Publication Date |
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| CN106451745A CN106451745A (en) | 2017-02-22 |
| CN106451745B true CN106451745B (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610905357.3A Active CN106451745B (en) | 2016-10-18 | 2016-10-18 | Automatic switching system for relay protection outlet loop |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115264752A (en) * | 2022-07-25 | 2022-11-01 | 珠海格力电器股份有限公司 | Error connection preventing circuit, air conditioner and control method of air conditioner |
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| CN104821557A (en) * | 2015-04-23 | 2015-08-05 | 中国能源建设集团江苏省电力设计院有限公司 | Control loop of breaker operation box |
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|---|---|---|---|---|
| US7532955B2 (en) * | 2002-02-25 | 2009-05-12 | General Electric Company | Distributed protection system for power distribution systems |
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2016
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| CN103515956A (en) * | 2013-10-08 | 2014-01-15 | 国家电网公司 | Voltage switching automatic paralleling device |
| CN104821557A (en) * | 2015-04-23 | 2015-08-05 | 中国能源建设集团江苏省电力设计院有限公司 | Control loop of breaker operation box |
| CN205643537U (en) * | 2015-12-22 | 2016-10-12 | 许继集团有限公司 | Middle and low voltage relay protection automatic checkout system |
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