CN112261843A - Power failure and recovery heat dissipation device for power distribution automation terminal and working method of power failure and recovery heat dissipation device - Google Patents
Power failure and recovery heat dissipation device for power distribution automation terminal and working method of power failure and recovery heat dissipation device Download PDFInfo
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- CN112261843A CN112261843A CN202011163630.2A CN202011163630A CN112261843A CN 112261843 A CN112261843 A CN 112261843A CN 202011163630 A CN202011163630 A CN 202011163630A CN 112261843 A CN112261843 A CN 112261843A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000011084 recovery Methods 0.000 title description 6
- 238000007599 discharging Methods 0.000 claims abstract description 26
- 239000000523 sample Substances 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000001960 triggered effect Effects 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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- 239000013307 optical fiber Substances 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
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- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power failure and restoration heat dissipation device for a power distribution automation terminal and a working method thereof, and the power failure and restoration heat dissipation device is characterized by comprising the following steps: the device comprises a first relay KM1, a second relay KM2, a timing switch module and a fan; the ring main unit secondary power supply is connected with the ring main unit charging and discharging module through a pair of normally closed auxiliary contacts KM11 of the first relay KM1, and is connected to the power supply input end of the timing switch module in parallel; the positive electrode and the negative electrode of the DTU backup power battery are connected to the DTU charging and discharging module through a pair of normally closed auxiliary contacts KM21 of the second relay KM 2; and the coils of the first relay KM1 and the second relay KM2 are connected with the fan in parallel and then are connected with the power supply input end and the output end of the timing switch module. The structure is simple, the use is convenient, the work is reliable, the volume of the manufactured finished product is small, the weight is light, and the installation and the removal are convenient. The alternating current power supply and the direct current power supply can be simultaneously stopped and automatically radiated.
Description
Technical Field
The invention belongs to the technical field of operation and maintenance of power distribution networks, and particularly relates to a power failure and recovery heat dissipation device for a power distribution automation terminal and a working method of the power failure and recovery heat dissipation device.
Background
With the arrival of the 5G era, the power industry also enters the 5G era, and primary equipment in a 10kV distribution network power supply system, such as a ring main unit and a switch cabinet, has realized remote three-remote functions, namely remote control, remote measurement and remote signaling. The three definitions are that remote control: the background of the power supply dispatching building can directly remotely control the on-site switch on/off and remote signaling: after the remote control is successful, the dispatching background can see the on-site switch on/off state and the ground switch off state, and telemeters the following steps: the background can see the real-time current and voltage values of the field device. The equipment capable of controlling the field switch, checking the switching position of the field switch equipment and monitoring the current and voltage values in real time is called a power distribution automation terminal (DTU for short), and the DTU and the scheduling background are communicated by adopting a wireless public network module or optical fiber. Along with the opening of an electric power market, more and more manufacturers produce DTUs to enter an electric power system, the DTUs of the manufacturers have different equipment quality, and the DTUs often break down under the current operation and maintenance condition, such as disconnection, and the looped network cabinet remote measurement abnormity, switch remote control failure, remote signaling jitter and other faults are caused.
The ring main unit and the switch cabinet (hereinafter, the ring main unit is taken as an example), the ring main unit is provided with an electric operating mechanism, a power supply of the electric operating mechanism is taken from a secondary side of a PT (PT converts 10000V voltage of a primary side into 100V and 220V voltage of the secondary side) of the ring main unit, 100V is sampling voltage (for a dispatching background), and 220V is power supply voltage, and the sampling voltage is used by a secondary loop of the ring main unit and a DTU working power supply (including an operation loop power supply and a battery charging power supply).
Disclosure of Invention
Aiming at the defects and shortcomings of the existing scheme, the invention provides the power failure and restoration heat dissipation device for the distribution automation terminal and the working method thereof, which can simultaneously stop the alternating current power supply and the direct current power supply and automatically dissipate heat.
The technical scheme is as follows:
a stop-and-reply heat dissipation device for a distribution automation terminal, characterized by comprising: the device comprises a first relay KM1, a second relay KM2, a timing switch module and a fan; the ring main unit secondary power supply is connected with the ring main unit charging and discharging module through a pair of normally closed auxiliary contacts KM11 of the first relay KM1, and is connected to the power supply input end of the timing switch module in parallel; the positive electrode and the negative electrode of the DTU backup power battery are connected to the DTU charging and discharging module through a pair of normally closed auxiliary contacts KM21 of the second relay KM 2; and the coils of the first relay KM1 and the second relay KM2 are connected with the fan in parallel and then are connected with the power supply input end and the output end of the timing switch module.
Preferably, the timing switch module is composed of a single chip microcomputer, a temperature controller, a timing switch relay and a timing switch power supply which are connected.
Preferably, the DTU backup power battery is connected with the DTU through the electric quantity monitoring module.
Preferably, the power input end of the timing switch module is connected with a secondary power supply of the ring main unit and a branch of the relay coil is respectively provided with an auxiliary contact of a temperature controller; the auxiliary contact of the temperature controller is connected with the temperature controller; the temperature controller is connected with the DTU and the temperature sensor probe; the temperature sensor probe is arranged on the CPU plate of the wireless public network module and the DTU.
Preferably, when the DTU works, the ring main unit secondary power supply provides power for the DTU and the timing switch module, and charges a DTU storage battery;
when the timing switch module is triggered, the timing switch relay acts to output a timing switch power supply, at the moment, the first relay KM1 and the second relay KM2 act, the normally closed auxiliary contacts KM11 and KM21 are disconnected, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are disconnected, the DTU and the wireless public network module are powered off, and the fan is started to dissipate heat;
when the timing of the timing switch module reaches the preset time, the timing switch power supply is stopped being output, the normally closed auxiliary contacts KM11 and KM21 are closed, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are powered on, the DTU is started, the wireless public network module is started, and the fan stops radiating.
Preferably, when the input power supply is powered off and the DTU terminal starts the storage battery to supply power, the electric quantity monitoring module monitors the residual electric quantity of the storage battery in real time, and when the residual electric quantity of the storage battery is monitored to be less than 30%, a low-voltage alarm signal is sent to the DTU, and then the DTU sends the low-voltage alarm signal to the scheduling background.
Preferably, when the temperature sensor probe detects that the temperature of the wireless public network module or the CPU board of the DTU reaches a preset temperature, the temperature controller sends a high-temperature alarm signal to the DTU, and then the DTU sends the high-temperature alarm signal to the scheduling background, when the temperature of the CPU board of the DTU exceeds the preset temperature, the temperature controller is started, the auxiliary contact of the temperature controller is switched on from off, the normally closed auxiliary contacts KM11 and KM21 are switched off, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are switched off, the DTU and the wireless public network module are.
The invention and the optimized proposal thereof have the advantages of simple structure, convenient use, reliable work, small volume of the manufactured finished product, light weight and convenient installation and disassembly. The alternating current power supply and the direct current power supply can be simultaneously stopped and automatically radiated. The device can also detect the residual electric quantity of the storage battery, when the set low electric quantity is reached, the device automatically alarms, sends a signal to the scheduling background to remind operation and maintenance personnel that the storage battery has faults and needs to be charged or replaced in time.
The temperature of a wireless public network module or a Central Processing Unit (CPU) plate of an automatic terminal unit (DTU) can be monitored in real time, when the set critical temperature is reached, a high-temperature alarm signal is sent to a scheduling background by the device to remind operation and maintenance personnel, and the DTU of the group has overhigh operating temperature and needs to be noticed. When the 220V power supply is input and the DTU terminal starts the storage battery to supply power, the residual electric quantity of the storage battery can be monitored in real time by using the electric quantity monitoring module, when the residual electric quantity of the storage battery is monitored to be less than 30%, a low-voltage alarm signal is sent to the DTU, and then the DTU sends the low-voltage alarm signal to the dispatching background to remind a dispatcher of incapability of remote control operation due to insufficient electric quantity.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic circuit diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of temperature control according to an embodiment of the present invention.
Detailed Description
In order to make the features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail as follows:
as shown in fig. 1, the apparatus of the present embodiment includes: the device comprises a first relay KM1, a second relay KM2, a timing switch module and a fan; the secondary power supply of the ring main unit is connected with the ring main unit charging and discharging module through a pair of normally closed auxiliary contacts KM11 of a first relay KM1, and is connected with the power supply input end of the timing switch module in parallel; the positive electrode and the negative electrode of the DTU backup power battery are connected to the DTU charging and discharging module through a pair of normally closed auxiliary contacts KM21 of a second relay KM 2; the coils of the first relay KM1 and the second relay KM2 are connected with the fan in parallel and then are connected with the power supply input end and the output end of the timing switch module.
In this embodiment, the timing switch module is composed of a single chip microcomputer, a temperature controller, a timing switch relay and a timing switch power supply, which are connected, the single chip microcomputer is used for controlling the timing on-off of the timing switch relay and receiving a control signal transmitted by the DTU, and the timing switch relay is used for controlling the on-off of the timing switch power supply. The DTU backup power supply battery is connected with the DTU through the electric quantity monitoring module. The power supply input end of the timing switch module is connected with a secondary power supply of the ring main unit and a branch of the relay coil is respectively provided with an auxiliary contact of a temperature controller; the temperature controller auxiliary contact is connected with the temperature controller; the temperature controller is connected with the DTU and the temperature sensor probe; the temperature sensor probe is arranged on the CPU plate of the wireless public network module and the DTU.
The working principle of the device of the embodiment is as follows: before power transmission, if the storage battery of the ring main unit is dead, the secondary 220V power line of the ring main unit is detached, the secondary 220V power line is connected to a pair of normally closed auxiliary contacts KM11 of a relay KM1 shown in fig. 1 and is connected to the power input end of a timing switch module in parallel, a coil KM1, a coil KM2 and a fan are connected in parallel and then connected with an output power supply of the timing module, the positive electrode and the negative electrode of a battery of a DTU backup power supply (battery power supply) are connected to a pair of normally closed auxiliary contacts KM21 of a relay KM 2.
When an automatic terminal (DTU) works, a PT secondary side 220V power supply provides a DTU working power supply and a timing switch module working power supply, and a DTU storage battery is charged.
The action time and the device time of the timing switch module are set, when the device time reaches the set time of the module, the module relay acts to output a 220V power supply, at the moment, the relays KM1 and KM2 act, the normally closed auxiliary contacts KM11 and KM21 are disconnected, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are disconnected, the DTU and the wireless public network module are shut down, and the fan starts to radiate heat. When the set time is passed, the timing module relay stops outputting the 220V power supply, the relays KM1 and KM2 recover at the time, the normally closed auxiliary contacts KM11 and KM21 are closed, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are powered on, the DTU is started, the wireless public network module is started, and the fan stops radiating.
When a 220V power supply is input and the power supply is cut off, and the DTU terminal starts the storage battery to supply power, the electric quantity monitoring module monitors the residual electric quantity of the storage battery in real time, and when the residual electric quantity of the storage battery is monitored to be less than 30%, a low-voltage alarm signal is sent to the DTU, and then the DTU sends the low-voltage alarm signal to the scheduling background.
WK is the auxiliary connection point of temperature controller, its temperature sensor probe is installed on the CPU plate of wireless public network module and automatic terminal (DTU), when temperature sensor probe detects wireless public network module or automatic terminal (DTU) CPU plate temperature and reaches the settlement temperature as shown in figure 2, the temperature controller sends high temperature alarm signal to DTU, send to the dispatch backstage supporter by DTU again, when exceeding the settlement value, the temperature controller starts, auxiliary connection point WK becomes the switch-on by the disconnection, relay KM1, KM2 action this moment, output 220V power, relay KM1, KM2 action this moment, normally closed auxiliary contact KM11, KM21 disconnection, looped netowrk cabinet charge-discharge module power, terminal charge-discharge module power disconnection, the DTU shuts down, wireless public network module shuts down, the fan starts the heat dissipation.
In addition, the device of the embodiment can be additionally provided with a test button for testing whether the device has a fault. The operation is as follows: when the button is pressed down, the normally open auxiliary contact of the timing module is forced to be closed, the relays KM1 and KM2 act at the moment, the normally closed auxiliary contacts KM11 and KM21 are disconnected, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are disconnected, the DTU is turned off, the wireless public network module is turned off, and the fan is started to radiate heat. This can indicate that the device is normal and can continue to operate and vice versa.
The present invention is not limited to the above-mentioned preferred embodiments, and various other types of power-off/power-off heat dissipation devices for distribution automation terminals and working methods thereof can be obtained by anyone who has the benefit of the present invention.
Claims (7)
1. A stop-and-reply heat dissipation device for a distribution automation terminal, characterized by comprising: the device comprises a first relay KM1, a second relay KM2, a timing switch module and a fan; the ring main unit secondary power supply is connected with the ring main unit charging and discharging module through a pair of normally closed auxiliary contacts KM11 of the first relay KM1, and is connected to the power supply input end of the timing switch module in parallel; the positive electrode and the negative electrode of the DTU backup power battery are connected to the DTU charging and discharging module through a pair of normally closed auxiliary contacts KM21 of the second relay KM 2; and the coils of the first relay KM1 and the second relay KM2 are connected with the fan in parallel and then are connected with the power supply input end and the output end of the timing switch module.
2. The power distribution automation terminal shutdown heat dissipation device of claim 1, wherein: the timing switch module is composed of a singlechip, a timing switch relay and a timing switch power supply which are connected.
3. The power distribution automation terminal shutdown heat dissipation device of claim 2, wherein: and the DTU backup power supply battery is connected with the DTU through the electric quantity monitoring module.
4. The power distribution automation terminal shutdown heat dissipation device of claim 2, wherein: the power supply input end of the timing switch module is connected with a secondary power supply of the ring main unit and a branch of the relay coil is respectively provided with an auxiliary contact of a temperature controller; the auxiliary contact of the temperature controller is connected with the temperature controller; the temperature controller is connected with the DTU and the temperature sensor probe; the temperature sensor probe is arranged on the CPU plate of the wireless public network module and the DTU.
5. The operating method of a power distribution automation terminal power outage heat dissipation device as set forth in claim 2, wherein: when the DTU works, the ring main unit secondary power supply provides power for the DTU and the timing switch module and charges a DTU storage battery;
when the timing switch module is triggered, the timing switch relay acts to output a timing switch power supply, at the moment, the first relay KM1 and the second relay KM2 act, the normally closed auxiliary contacts KM11 and KM21 are disconnected, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are disconnected, the DTU and the wireless public network module are powered off, and the fan is started to dissipate heat;
when the timing of the timing switch module reaches the preset time, the timing switch power supply is stopped being output, the normally closed auxiliary contacts KM11 and KM21 are closed, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are powered on, the DTU is started, the wireless public network module is started, and the fan stops radiating.
6. The method of operating a power distribution automation terminal shutdown heat sink according to claim 3, characterized in that: when the input power supply is powered off and the DTU terminal starts the storage battery to supply power, the electric quantity monitoring module monitors the residual electric quantity of the storage battery in real time, and when the residual electric quantity of the storage battery is monitored to be less than 30%, a low-voltage alarm signal is sent to the DTU, and then the DTU sends the low-voltage alarm signal to the scheduling background.
7. The method of operating a power distribution automation terminal shutdown heat sink according to claim 4, characterized in that: when the temperature sensor probe detects that the temperature of the CPU plate of the wireless public network module or the DTU reaches a preset temperature, the temperature controller sends a high-temperature alarm signal to the DTU, the high-temperature alarm signal is sent to the scheduling background by the DTU, when the temperature exceeds the preset value, the temperature controller is started, the auxiliary contact of the temperature controller is switched to be on by disconnection, the normally closed auxiliary contacts KM11 and KM21 are disconnected, the power supply of the charging and discharging module of the ring main unit and the power supply of the terminal charging and discharging module are disconnected, the DTU and the wireless public network module are shut down, and the fan is.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011163630.2A CN112261843B (en) | 2020-10-27 | 2020-10-27 | Power-off and power-on heat dissipation device for power distribution automation terminal and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011163630.2A CN112261843B (en) | 2020-10-27 | 2020-10-27 | Power-off and power-on heat dissipation device for power distribution automation terminal and working method thereof |
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| CN112261843B CN112261843B (en) | 2024-05-28 |
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