CN214176985U - Automatic switching system for low-voltage station service - Google Patents

Automatic switching system for low-voltage station service Download PDF

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Publication number
CN214176985U
CN214176985U CN202022937027.7U CN202022937027U CN214176985U CN 214176985 U CN214176985 U CN 214176985U CN 202022937027 U CN202022937027 U CN 202022937027U CN 214176985 U CN214176985 U CN 214176985U
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section
switch
factory
reserve
generating line
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CN202022937027.7U
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杜婉玲
吕靖
李文城
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Guangzhou Environmental Investment Conghua Environmental Protection Energy Co ltd
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Guangzhou Environmental Investment Conghua Environmental Protection Energy Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

The utility model discloses a low pressure station service automatic switching system belongs to the power equipment field, including 10kVI section generating lines, 10kVI section generating line lower extreme is connected with the change of #1 factory, the change of #1 factory downside fixed mounting has the change of #1 factory step-down to press the side switch, the change of #1 factory step-down presses side switch downside to be connected with 400V I section generating line, 400V I section generating line downside fixed mounting has the reserve inlet wire switch of 400V I section, 10kV I section generating line right side is equipped with 10kV II section generating line, 10kV II section generating line left side lower extreme is connected with the change of #2 factory, the change of #2 factory lower extreme is connected with the change of #2 factory step-down and presses the side switch, the change of #2 factory step-down presses side switch lower extreme fixedly connected with 400V II section generating line. The automatic switching function of the low-voltage station service power under the automatic backup power switching lock ensures that the workload of operating personnel is greatly reduced when the 10kV II-section high-voltage bus loses power, and ensures that the low-voltage station service power supply is quickly recovered.

Description

Automatic switching system for low-voltage station service
Technical Field
The utility model relates to a power equipment has especially related to a low pressure station service automatic switching system.
Background
500t/d burns burning furnace power plant 400V reserve and 400V #2 factory and becomes all to hang on 10kV II section generating line, lose the electricity when this section 10kV generating line, reserve factory becomes and loses the voltage with the #2 factory becomes simultaneously, spare power automatic switching automatic shutting, 400V II section generating line loses the electricity, if need resume 400V II section load this moment, need manual completion from 400V I sections switching power supplies to 400V II section operation, the time of regaining power is longer to need automatic switching equipment to assist the operation.
The patent CN201410265219.4 discloses an automatic switching system and method for main and auxiliary power supplies, which is widely applied to a system that uses an MOS switch tube to control the main and auxiliary power supplies for power supply, but the current power supply system that uses an NMOS switch tube for power supply switching has a relatively large chip area due to relatively complex circuits, is inconvenient to integrate, and has a risk of abnormal power supply; in the power supply system adopting the PMOS switching tube for switching the power supply, the substrate is always at a higher potential, so that the performance of the power supply system is unstable, threshold leakage is easy to cause when the power supply system is turned off, whether the voltage of the main power supply and the secondary power supply meets the power utilization requirement is detected in real time by arranging the detection module, and the switching between the main power supply and the secondary power supply is automatically realized by utilizing the switch control circuit, so that the power supply connected with the power utilization system always meets the power utilization requirement.
Some of the above systems have disadvantages: when the high-voltage bus hung by the standby transformer is power-off, the standby automatic switching can not normally act, so that the voltage of the standby transformer and the station transformer hung on the same section of high-voltage bus is simultaneously lost, the standby transformer and the station transformer can not be quickly recovered, and the practicability of the system is reduced.
Disclosure of Invention
The utility model provides an automatic switching system for low voltage station service, which aims to adopt the automatic switching function, when the station service system is normal, the station service system keeps the switch-on state of the station service system, the station service system keeps the switch-off state of the station service system, the station service system keeps the switch-on state of the station service system, the station service system normally, the station service system keeps the station service system switch-off state of the station service system, the station service system keeps the station service system normally, the station service system of 400V I section, the station service system, the station of the station service system keeps the station service system, the station service system of the station service system of the station of, DCS sends out signals automatically to jump off a standby low-voltage side switch, and #2 factory low-voltage side switch delays for 3 seconds to close a 400V I section standby incoming line switch and a 400V II section standby incoming line switch, so that the 400V II section is powered by a 400V I section, and the automatic switching function of low-voltage factory power under a self-switching lock ensures the workload of operating personnel when 10kV II section buses are out of power and ensures the quick recovery of a low-voltage factory power supply.
The utility model provides a specific technical scheme as follows: the utility model provides a pair of low pressure station service automatic switching system includes 10kVI section generating lines, the utility model provides a
The lower end of a 10kVI section bus is connected with a #1 station transformer, the lower side of the #1 station transformer is fixedly provided with a #1 station transformer-transformer side switch, the lower side of the #1 station transformer-transformer side switch is connected with a 400V I section bus, the lower side of a 400V I section bus is fixedly provided with a 400V I section standby incoming line switch, the right side of a 10kV I section bus is paved with a 10kV II section bus, the left lower end of the 10kV II section bus is connected with a #2 station transformer, the lower end of the #2 station transformer is connected with a #2 station transformer-transformer side switch, the lower end of the #2 station transformer-transformer side switch is fixedly connected with a 400V II section bus, the lower end of the 400V II section bus is fixedly provided with a 400V II section standby incoming line switch, and the right lower side of the 10kV II section bus is connected with a standby transformer, reserve change downside fixed mounting have reserve step-down depression side switch, reserve step-down depression side switch downside fixedly connected with 400V reserve section generating line, 400V reserve section generating line downside left end fixed mounting has reserve B inlet wire switch that becomes, reserve B inlet wire switch left end fixed connection 400V II section reserve inlet wire switch that becomes, 400V reserve section generating line right side lower extreme fixed mounting has reserve A inlet wire switch that becomes, reserve A inlet wire switch left end connection 400V I section reserve inlet wire switch that becomes.
Optionally, the standby transformer B incoming line disconnecting link and the standby transformer A incoming line disconnecting link are in a normally closed state. Optionally, the 400V I section standby power incoming line switch and the 400V II section standby power incoming line switch keep an open state.
Alternatively, the #2 plant low to high side switch may wait three seconds. The utility model has the advantages as follows: an embodiment of the utility model provides a low pressure station service automatic switching system through automatic switch-over merit
When the station service power system is normal, the #1 station transformer low-voltage switch, the #2 station transformer low-voltage switch, the standby transformer A incoming line disconnecting link and the standby transformer B incoming line disconnecting link keep a switching-on state, the 400V I section standby power incoming line switch and the 400V II section standby power incoming line switch keep a switching-off state, the 400V I section bus, the 400V II section bus, the standby section bus have normal voltage, the 10kV I section bus and the 10kV II section bus have normal voltage, when the 10kV II section bus loses power, the 400V standby section bus and the 400V II section bus lose voltage,
become the step-down voltage side switch in #2 factory, # reserve step-down voltage side switch still keeps the combined floodgate state, 400V I section bus voltage is normal this moment, DCS sends out the signal automatically and jumps off reserve step-down voltage side switch, #2 factory step-down voltage side switch delays 3 seconds and closes the reserve inlet wire switch of 400V I section, the reserve inlet wire switch of 400V II section, realize that 400V II section is supplied power by 400V I section, the automatic switch function of low pressure station service power under the auto-switch shutting, operating personnel's work load when having guaranteed that 10kV II section bus loses power has significantly reduced, guarantee that low pressure station service power resumes fast.Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of an installation structure of an automatic low-voltage station service switching system according to an embodiment of the present invention.
In the figure: 1. #2 plant Low to high side switch; 2. a standby low-to-high side switch; 3. #1 plant Low to high side switch; 4. a 400V II section standby incoming line switch; 5. 400V I sections of spare incoming switches; 6. 400V I sections of bus bars; 7. a 400V II section bus; 8. a 400V standby section bus; 9. a standby variable B incoming line disconnecting link; 10. a standby variable A incoming line disconnecting link; 11. 10kV I section bus; 12. 10kV II section bus; 13. #1 manufacturer change;
14. #2 plant variation; 15. and (5) changing to a standby mode.Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the scope of the present practical novel protection.
The following will describe in detail an automatic switching system for low-voltage service power according to an embodiment of the present invention with reference to fig. 1.
Referring to fig. 1, an automatic switching system for low voltage station service provided in an embodiment of the present invention includes 10kVI segments of bus bar 11, a #1 station transformer 13 connected to a lower end of the 10kVI segments of bus bar 11, a #1 station transformer low-voltage side switch 3 fixedly installed on a lower side of the #1 station transformer 13, a #1 station transformer low-voltage side switch 3 connected to a lower side of the #1 station transformer low-voltage side switch 3, a 400V I segment of bus bar 6 connected to a lower side of the #1 station transformer low-voltage side switch 6, a 400V I segment of standby incoming line switch 5 fixedly installed on a lower side of the 400V I segment of bus bar 6, a 10kV II segment of bus bar 12 laid on a right side of the 10kV I segment of bus bar 11, a #2 station transformer 14 connected to a left lower end of the #2 station transformer 14, a #2 station transformer low-voltage side switch 1 connected to a lower end of the #2 station transformer low-voltage side switch 1, a 400V II segment of bus bar 7 fixedly connected to a lower end of the #2 station transformer low-voltage side switch 1, 400V II section generating line 7 lower extreme fixed mounting has the reserve inlet wire switch 4 of 400V II section, 12 right-hand member downside of 10kV II section generating line is connected with reserve the change 15, reserve 15 downside fixed mounting that become becomes low-voltage side switch 2, reserve low-voltage side switch 2 downside fixed connection 400V reserve section generating line 8 of step-down, the reserve B inlet wire switch 9 that becomes of standby section generating line 8 downside left end fixed mounting, reserve B inlet wire switch 4 of the reserve B inlet wire switch 9 left end fixed connection 400V II section, the reserve A inlet wire switch 10 that becomes of the reserve section generating line 8 right side lower extreme fixed mounting of 400V, reserve A inlet wire switch 10 left end connection 400V I section reserve inlet wire switch 5 that becomes of standby A inlet wire switch 10.
Referring to fig. 1, the standby B-type incoming line disconnecting link 9 and the standby a-type incoming line disconnecting link 10 are in a normally closed state, and when the station power system is normal, the #1 station transformer low-voltage switch 3, the #2 station transformer low-voltage switch 1, the standby low-voltage switch 2, the standby a-type incoming line disconnecting link 9 and the standby B-type incoming line disconnecting link 10 keep a switching-on state, the 400V I section standby power incoming line switch 5 and the 400V II section standby power incoming line switch 4 keep a switching-off state, and the 400V I section standby power incoming line disconnecting link 10 keeps a switching-off state
The voltage of the section bus 6, the 400V II section bus 7 and the spare section bus 8 is normal, the voltage of the 10kV I section bus 11 and the 10kV II section bus 12 is normal, when the 10kV II section bus 12 is in power loss, the voltage of the 400V spare section bus 8 and the 400V II section bus 7 is in power loss, the #2 factory low-voltage side switch 1 and the #2 factory low-voltage side switch still keep the closing state, at the moment, the voltage of the 400V I section bus 6 is normal, a DCS automatically sends a signal to jump off the spare low-voltage side switch 2 and the #2 factory low-voltage side switch 1, the 400V 400V I section spare incoming line switch 5 and the 400V II section spare incoming line switch 4 are closed for 3 seconds, the 400V II section is powered by the 400V I section, the automatic switching function of low-voltage power plant power utilization under the automatic switching locking is realized, the workload of operating personnel is greatly reduced when the 10kV II section bus 12 loses power, and the quick recovery of the low-voltage station power supply is ensured.
Referring to fig. 1, 400V I section of stand-by power incoming line switch 5 and 400V II section of stand-by power incoming line switch 4 keep the open state, when the station power system is normal, #1 station transformer low-voltage switch 3, #2 station transformer low-voltage switch 1, stand-by transformer low-voltage switch 2, stand-by transformer a incoming line knife switch 9, stand-by transformer B incoming line knife switch 10 keep the closed state, 400V I section of stand-by power incoming line switch 5, 400V II section of stand-by power incoming line switch 4 keep the open state, 400V I section of bus 6, 400V II section of bus 7, stand-by section of bus 8 are normal in voltage, 10kV I section of bus 11, 10kV II section of bus 12 are normal in voltage, when 10kV II section of bus 12 is lost, 400V stand-by section of bus 8, When the voltage of the bus 7 at the 400V section II is lost, the low-voltage side switch 1 at the #2 factory and the low-voltage side switch at the # standby are still kept in a closing state, the voltage of the bus 6 at the 400V I section is normal, a DCS automatically sends a signal to trip off the low-voltage side switch 2 at the #2 factory and the low-voltage side switch 1 at the #2 factory, and the bus is closed at the 400V I section within 3 seconds
The standby incoming line switch 5 and the standby incoming line switch 4 in the 400V II section realize that the 400V II section is supplied with power by the 400V I section, and the automatic switching function of low-voltage station service power under the self-switching lock ensures the workload of operating personnel when the 10kV II section bus 12 loses power, and ensures the quick recovery of the low-voltage station service power supply.
Referring to fig. 1, a #2 factory low-voltage side switch 1 needs to wait three seconds, when an industrial power system is normal, a #1 factory low-voltage side switch 3, a #2 factory low-voltage side switch 1, a standby low-voltage side switch 2, a standby transformer a incoming line knife switch 9 and a standby transformer B incoming line knife switch 10 keep on state, a 400V I section standby power incoming line switch 5 and a 400V II section standby power incoming line switch 4 keep off state, a 400V I section bus 6, a 400V II section bus 7, a standby section bus 8 have normal voltage, a 10kV I section bus 11 and a 10kV II section bus 12 have normal voltage, when the 10kV II section bus 12 loses power, the 400V standby section bus 8 and the 400V II section bus 7 lose voltage,
become low pressure side switch 1 for the #2 factory step-down, # reserve step-down pressure side switch still keeps the combined floodgate state, the 6 voltage of 400V I section generating line is normal this moment, DCS sends out the signal automatically and jumps reserve step-down pressure side switch 2 for the #2 factory step-down pressure side switch 1, the reserve inlet wire switch 5 of 400V I section is closed for 3 seconds of delay, the reserve inlet wire switch 4 of 400V II section, realize that 400V II section is supplied power by 400V I section, the automatic switch-over function of low pressure station service power under the auto-switch shutting, operating personnel's work load when having guaranteed to have significantly reduced 10kV II section generating line 12 power loss, guarantee low pressure station service power supply fast recovery.
The embodiment of the utility model provides an automatic switching system of low pressure station service, when station service system is normal, #1 station transformer low-voltage switch 3, #2 station transformer low-voltage switch 1, reserve transformer low-voltage switch 2, reserve transformer A inlet knife switch 9, reserve transformer B inlet knife switch 10 keep the combined floodgate state, 400V I section reserve power inlet switch 5, 400V II section reserve power inlet switch 4 keep the separating floodgate state, 400V I section bus 6, 400V II section bus 7, reserve section bus 8 voltage is normal, 10kV I section bus 11, 10kV II section bus 12 voltage is normal, when 10kV II section bus 12 loses the electricity, 400V reserve section bus 8, 400V II section bus voltage 7 loses the voltage,
become low pressure side switch 1 for the #2 factory step-down, # reserve step-down pressure side switch still keeps the combined floodgate state, the 6 voltage of 400V I section generating line is normal this moment, DCS sends out the signal automatically and jumps reserve step-down pressure side switch 2 for the #2 factory step-down pressure side switch 1, the reserve inlet wire switch 5 of 400V I section is closed for 3 seconds of delay, the reserve inlet wire switch 4 of 400V II section, realize that 400V II section is supplied power by 400V I section, the automatic switch-over function of low pressure station service power under the auto-switch shutting, operating personnel's work load when having guaranteed to have significantly reduced 10kV II section generating line 12 power loss, guarantee low pressure station service power supply fast recovery.
It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (4)

1. The utility model provides a low pressure station service automatic switching system, its characterized in that, switching system includes 10kVI section generating line (11), 10kVI section generating line (11) lower extreme is connected with the #1 factory and becomes (13), the #1 factory becomes (13) downside fixed mounting has the #1 factory to become the low pressure side switch (3) of transformer, the #1 factory becomes the low pressure side switch of transformer
(3) The downside is connected with 400V I section generating line (6), 400V I section generating line (6) downside fixed mounting has 400V I sections of reserve inlet wire switch (5), 10kV I section generating line (11) right side is spread and is equipped with 10kV II section generating line (12), 10kV II section generating line (12) left side lower extreme is connected with the #2 factory and becomes (14), the #2 factory becomes (14) the lower extreme and is connected with #2 factory step-down and presses side switch (1), the #2 factory step-down presses side switch to become
(1) Lower extreme fixedly connected with 400V II section generating line (7), 400V II section generating line (7) lower extreme fixed mounting has the reserve inlet wire switch (4) of 400V II section, 10kV II section generating line (12) right-hand member downside is connected with reserve change (15), reserve change (15) downside fixed mounting has reserve step-down pressure side switch (2), reserve step-down pressure side switch (2) downside fixedly connected with 400V reserve section generating line (8), reserve step-down B inlet wire switch (9) of 400V reserve section generating line (8) downside left end fixed mounting, reserve B inlet wire switch (9) left end fixed connection 400V II section reserve inlet wire switch (4), reserve step-down A inlet wire switch (10) of 400V reserve section generating line (8) right side lower extreme fixed mounting, the left end of the standby variable A incoming line disconnecting link (10) is connected with a standby incoming line switch (5) with a section of 400V I.
2. The automatic switching system for the low-voltage auxiliary power according to claim 1, wherein the standby transformer B incoming line disconnecting link (9) and the standby transformer A incoming line disconnecting link (10) are in a normally closed state.
3. The automatic switching system for the low-voltage auxiliary power supply of claim 1, wherein the 400V I section standby power supply incoming line switch (5) and the 400V II section standby power supply incoming line switch (4) are kept in an open state.
4. The automatic switching system for low-voltage service power according to claim 1, wherein the #2 factory low-voltage side switch (1) needs to wait for three seconds.
CN202022937027.7U 2020-12-10 2020-12-10 Automatic switching system for low-voltage station service Active CN214176985U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022937027.7U CN214176985U (en) 2020-12-10 2020-12-10 Automatic switching system for low-voltage station service

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Application Number Priority Date Filing Date Title
CN202022937027.7U CN214176985U (en) 2020-12-10 2020-12-10 Automatic switching system for low-voltage station service

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Publication Number Publication Date
CN214176985U true CN214176985U (en) 2021-09-10

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