CN111478425A - High-voltage station service power fast switching system, power supply system and method - Google Patents
High-voltage station service power fast switching system, power supply system and method Download PDFInfo
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- CN111478425A CN111478425A CN202010305435.2A CN202010305435A CN111478425A CN 111478425 A CN111478425 A CN 111478425A CN 202010305435 A CN202010305435 A CN 202010305435A CN 111478425 A CN111478425 A CN 111478425A
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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
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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
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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
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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
- 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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a high-voltage station service quick-switching system, a power supply system and a method, which solve the problems that a high-voltage station service quick-switching device cannot identify a circuit breaker test position and the starting switching logic of 'CT disconnection', and the like, and prevent the high-voltage station service quick-switching device from still starting switching when the circuit breaker test position exists; the technical scheme is as follows: the quick-cutting device comprises a quick-cutting device, wherein an opening plate of the quick-cutting device is additionally provided with a working power supply working position interface and a standby power supply working position interface which are used for accessing a position signal, so that the quick-cutting device can identify a circuit breaker test position; the electric signal of inserting fast cutting device includes working power supply inlet wire current, stand-by power supply inlet wire current, working power supply inlet wire current connection working power supply circuit breaker three-phase current stand-by power supply inlet wire current connection stand-by power supply circuit breaker three-phase current.
Description
Technical Field
The invention relates to the technical field of high-voltage station service power quick switching, in particular to a high-voltage station service power quick switching system, a power supply system and a method.
Background
The quick switching device is mainly used for ensuring the service power supply. The service power is generally not allowed to be lost for a long time, under the condition of fault, the power supply load may be powered off due to bus fault or working power supply fault, and at the moment, the standby power supply needs to be switched to continuously supply power to the load.
The inventor finds that the common high-voltage station service quick-switching device cannot identify the working/experimental positions of the working and standby incoming line circuit breakers, such as: the service power is in the working power supply side, and stand-by power supply inlet wire circuit breaker is in experimental position, if switch over to stand-by power supply side this moment, the service power just probably causes short-time power loss, causes harm to the station service equipment. Moreover, the general high-voltage service power quick-switching device does not judge CT disconnection, and does not start switching logic.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-voltage station service quick-switching system, a power supply system and a method, which solve the problems that a high-voltage station service quick-switching device cannot identify a circuit breaker test position and the starting switching logic of CT disconnection and the like, and prevent the high-voltage station service quick-switching device from still starting switching when the circuit breaker test position is reached.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a high-voltage station service fast switching system, including a fast switching device, where an opening plate of the fast switching device is additionally provided with a working power supply working position interface and a standby power supply working position interface for accessing a position signal, so that the fast switching device can identify a circuit breaker test position;
the electric signal of inserting fast cutting device includes working power supply inlet wire current, stand-by power supply inlet wire current, working power supply inlet wire current connection working power supply circuit breaker three-phase current stand-by power supply inlet wire current connection stand-by power supply circuit breaker three-phase current.
In a second aspect, an embodiment of the present invention further provides a power supply system, which includes a working power supply, a standby power supply, a transfer switch, and the high-voltage service power fast switching system, where the fast switching device is connected to the working power supply, and the fast switching device is connected to the standby power supply through the transfer switch.
In a third aspect, an embodiment of the present invention further provides a control method for a high-voltage service power fast switching system, where a state flag is set, and when the state flag satisfies a first state, a switching manner of the fast switching device does not consider a position of a working/standby power circuit breaker; the fast switching device takes into account the working/backup power circuit breaker position when the status flag satisfies the second status.
As a further implementation manner, during the normal switching manner, the following condition is satisfied when the working power supply is switched to the standby power supply: the standby power supply voltage meets the switching condition; the standby power supply circuit breaker is in a working position;
the switching from the standby power supply to the working power supply meets the following conditions: the working power supply voltage meets the switching condition (the voltage condition comprises amplitude, angular difference and frequency difference); the working power supply breaker is in a working position.
As a further implementation manner, when the condition is met and manual switching is on outside, the fast switching device is switched from the working power supply to the standby power supply according to a fixed value; or, the standby power supply is switched to the working power supply.
As a further implementation mode, if the standby power CT is detected to be disconnected after the normal mode is started and switched, if the voltage of the working power supply still meets the switching condition (the voltage condition comprises amplitude, angular difference and frequency difference), and the working power supply breaker is at the working position, the fast switching device switches the service power to the working power supply according to a fixed value, and simultaneously, the fast switching device displays that the standby power CT is disconnected to start switching.
As a further implementation manner, when the service power is supplied by a working power supply, if the external power supply is switched on after receiving protection starting and the standby power supply voltage is satisfied (the voltage conditions include amplitude, angular difference and frequency difference), the standby power supply circuit breaker is in a working position, and the fast switching device is switched to the standby power supply according to a fixed value;
when the service power is supplied by a working power supply, if the current CT disconnection of the working power supply is detected and the voltage of the standby power supply is met (the voltage conditions comprise amplitude, angular difference and frequency difference), the circuit breaker of the standby power supply is at a working position, and the fast switching device is switched to the standby power supply according to a fixed value; meanwhile, the fast switching device displays that the working power supply CT is disconnected to start switching;
when the service power is supplied by the working power supply, if the service bus voltage loss or the stealing trip of the working power supply circuit breaker is detected and the standby power supply voltage is met (the voltage conditions comprise amplitude, angle difference and frequency difference), the standby power supply circuit breaker is in a working position, and the fast switching device is switched to the standby power supply according to the fixed value.
As a further implementation mode, in the condition of protection starting switching, criteria that the standby power supply circuit breaker is in a working position and the standby power supply circuit breaker is in the working position are added.
As a further implementation manner, after the switching is started, when the disconnection of the standby power supply CT is detected, the standby power supply circuit breaker can be tripped to judge whether to trip off the standby power supply circuit breaker according to the disconnection of the standby power supply CT after the switching is performed under the accident/abnormal condition.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
according to one or more embodiments of the invention, a working power supply working position and a standby power supply working position are added on an opening plate, an alternating current loop of a quick switching device is modified into a three-phase current input of a working power supply circuit breaker and a three-phase current input of a standby power supply circuit breaker, so that the starting switching logic of 'CT disconnection' is added; the problems that the fast switching device cannot identify a circuit breaker test position and the logic of 'CT disconnection' starting switching and the like are solved, and the high-voltage service fast switching device is prevented from still starting switching when the circuit breaker test position is reached and cannot be started and switched quickly when the 'CT disconnection' occurs.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is an illustration of a quick-disconnect apparatus according to one or more embodiments of the present invention;
FIG. 2 is an AC loop diagram of a fast switching apparatus according to one or more embodiments of the present disclosure;
FIG. 3 is a circuit diagram of a fast switching system in accordance with one or more embodiments of the present invention;
FIG. 4 is a control flow diagram of the present invention in accordance with one or more embodiments.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
the first embodiment is as follows:
the embodiment provides a high pressure station service power fast cutting system, including fast cutting device, the board of opening of fast cutting device adds working power supply position interface, the stand-by power supply position interface that is used for accessing the position signal, promptly, as shown in fig. 1, increases "working power supply position", "stand-by power supply position" at the board of opening of conventional fast cutting device.
The electric quantity signal of the access fast switching device comprises working power supply incoming line current and standby power supply incoming line current, wherein the working power supply incoming line current is connected with the working power supply breaker three-phase current, and the standby power supply incoming line current is connected with the standby power supply breaker three-phase current. That is, as shown in fig. 2, the alternating current circuit of the conventional fast switching apparatus is changed to: the three-phase current input of the working power supply circuit breaker and the three-phase current input of the standby power supply circuit breaker are used for increasing the starting switching logic of 'CT disconnection'.
The circuit diagram of the fast switching system of the present embodiment is shown in fig. 3.
Example two:
this embodiment still provides a power supply system, including working power supply, stand-by power supply, change over switch and embodiment one the high pressure station service power supply cut system soon, the operating power supply is connected to the fast device of cutting, the fast device of cutting passes through change over switch and links to each other with a plurality of stand-by power supplies.
Example three:
the embodiment also provides a control method of the high-voltage station service quick switching system, which comprises the steps of setting a state mark, and when the state mark meets a first state, the switching mode of the quick switching device does not consider the position of the working/standby power supply circuit breaker; the fast switching device takes into account the working/backup power circuit breaker position when the status flag satisfies the second status.
In this embodiment, the status flag is a trial control word, the first status is the trial control word set to 1, and the second status is the trial control word set to 0. When the test control word is set to be 1, the high-voltage auxiliary power supply quick switching device is the same as a conventional quick switching device, the position of a working/standby power supply circuit breaker is not considered, the switching mode and the logic of the high-voltage auxiliary power supply quick switching device are also the same as those of the conventional device, and the description is omitted here.
When the test control word is set to 0, the fast switching device considers the "working/standby power supply circuit breaker position", as shown in fig. 4, the specific switching method is as follows:
normal switching (including series and parallel) takes working to standby as an example (standby power is in hot standby, and the same applies to cold standby):
the standby power supply is normally switched to the standby power supply from work, ① standby power supply voltage meets switching conditions (voltage conditions comprise amplitude, angle difference and frequency difference), ② standby power supply circuit breaker is in a working position, and the fast switching device switches the service power from the working power supply to the standby power supply according to a fixed value when the external manual switching is switched on after the 2 conditions are met.
Accident mode 1: the auxiliary power is supplied by the working power supply, and if the protection starting external switch is received and the voltage of the standby power supply is met (the voltage conditions comprise amplitude, angle difference and frequency difference), the standby power supply circuit breaker is at a working position, and the quick switching device switches the auxiliary power to the standby power supply according to a fixed value.
The criterion that a standby power supply breaker is in a working position is added in the protection starting switching logic of the conventional fast switching device.
Accident mode 2: the auxiliary power is supplied by the working power supply, if the current CT disconnection of the working power supply is detected and the voltage of the standby power supply is met (the voltage conditions comprise amplitude, angle difference and frequency difference), the standby power supply circuit breaker is at a working position, and the quick switching device switches the auxiliary power to the standby power supply according to a fixed value. Meanwhile, the fast switching device sends 'working power supply CT disconnection', and the device display is started to switch by 'working power supply CT disconnection'.
Abnormal situation mode: the service power is supplied by the working power supply, and if the service bus voltage loss or the stealing and jumping of the working power supply circuit breaker is detected and the standby power supply voltage is met (the voltage conditions comprise amplitude, angle difference and frequency difference), the standby power supply circuit breaker is in a working position, and the service power is switched to the standby power supply by the quick switching device according to a fixed value.
The criterion that a standby power supply breaker is in a working position is added in the protection starting switching logic of the conventional fast switching device.
If the standby power supply CT is detected to be disconnected after the normal mode is started and switched (taking the working switching to the standby mode as an example), at the moment, if the working power supply voltage still meets the switching conditions (the voltage conditions comprise amplitude, angle difference and frequency difference), and the working power supply circuit breaker is at a working position, the fast switching device switches the service power to the working power supply according to a fixed value, and simultaneously, the fast switching device sends the standby power supply CT to be disconnected, and the device displays that the standby power supply CT is started and switched.
If the emergency mode 1, the emergency mode 2 or the abnormal condition mode starts switching, the 'standby power supply CT disconnection' is detected, and whether the standby power supply circuit breaker is tripped or not can be judged according to the fixed value 'the standby power supply CT disconnection tripping standby power supply circuit breaker after the switching of the emergency/abnormal condition'.
This embodiment has solved when the circuit breaker is in experimental position, and the problem that the service power is lost power and working power supply, stand-by power supply CT broken string for a short time caused by the quick switching device start-up of station service
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A high-voltage station service quick-switching system is characterized by comprising a quick-switching device, wherein a working power supply working position interface and a standby power supply working position interface which are used for accessing position signals are additionally arranged on an opening plate of the quick-switching device, so that the quick-switching device can identify a circuit breaker test position;
the electric signal of inserting fast cutting device includes working power supply inlet wire current, stand-by power supply inlet wire current, working power supply inlet wire current connection working power supply circuit breaker three-phase current stand-by power supply inlet wire current connection stand-by power supply circuit breaker three-phase current.
2. A power supply system comprising an operating power source, a backup power source, a transfer switch and a high voltage service quick switching system as claimed in claim 1, said quick switching device being connected to the operating power source and said quick switching device being connected to the backup power source through the transfer switch.
3. A power supply system according to claim 2, wherein there are a plurality of said backup power sources.
4. The control method of the high-voltage service rapid switching system according to claim 1, characterized in that a state flag is set, and when the state flag satisfies a first state, the switching mode of the rapid switching device does not consider the position of the working/standby power supply circuit breaker; the fast switching device takes into account the working/backup power circuit breaker position when the status flag satisfies the second status.
5. The control method of the high-voltage auxiliary power quick switching system according to claim 4, wherein in the normal switching mode, the switching from the working power supply to the standby power supply meets the following conditions: the standby power supply voltage meets the switching condition; the standby power supply circuit breaker is in a working position;
the switching from the standby power supply to the working power supply meets the following conditions: the working power supply voltage meets the switching condition; the working power supply breaker is in a working position.
6. The control method of the high-voltage service rapid switching system according to claim 5, wherein when the condition is met and manual switching is on externally, the rapid switching device is switched from the working power supply to the standby power supply according to a fixed value; or, the standby power supply is switched to the working power supply.
7. The method according to claim 6, wherein when the switching is started in a normal manner, the disconnection of the stand-by power supply CT is detected, and when the voltage of the working power supply still meets the switching condition and the working power supply circuit breaker is in the working position, the fast switching device switches the service power to the working power supply according to a fixed value, and the fast switching device displays the disconnection of the stand-by power supply CT to start the switching.
8. The control method of the high-voltage auxiliary power fast switching system according to claim 4, wherein when the auxiliary power is supplied by the working power supply, if the external switch-in for protection starting is received and the backup power supply voltage is met, the backup power supply circuit breaker is in the working position, and the fast switching device is switched to the backup power supply according to a fixed value;
when the service power is supplied by the working power supply, if the current CT of the working power supply is detected to be disconnected and the voltage of the standby power supply is met, the standby power supply circuit breaker is in a working position, and the fast switching device is switched to the standby power supply according to a fixed value; meanwhile, the fast switching device displays that the working power supply CT is disconnected to start switching;
when the station service is supplied with power by the working power supply, if the station service bus voltage loss or the stealing trip of the working power supply circuit breaker is detected and the standby power supply voltage is met, the standby power supply circuit breaker is at a working position, and the fast switching device is switched to the standby power supply according to a fixed value.
9. The method as claimed in claim 8, wherein the criterion that the backup power circuit breaker is at the working position and the criterion that the backup power circuit breaker is at the working position are added in the protection starting switching condition.
10. The method as claimed in claim 8, wherein the switching is initiated and when the disconnection of the back-up power CT is detected, the back-up power CT disconnection tripping back-up power circuit breaker can determine whether to trip off the back-up power circuit breaker according to the accident/abnormal situation.
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| CN202010305435.2A CN111478425B (en) | 2020-04-17 | 2020-04-17 | High-voltage station service power fast switching system, power supply system and method |
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| CN202010305435.2A CN111478425B (en) | 2020-04-17 | 2020-04-17 | High-voltage station service power fast switching system, power supply system and method |
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| CN111478425B CN111478425B (en) | 2021-07-30 |
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| CN204696788U (en) * | 2015-06-08 | 2015-10-07 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of large-size thermal power plant high-voltage Auxiliary power supply three power supply automatic switchover wiring construction |
| US9467006B2 (en) * | 2013-09-23 | 2016-10-11 | Trippe Manufacturing Company | Automatic transfer switch for three-phase applications |
| CN209658908U (en) * | 2019-05-24 | 2019-11-19 | 华能国际电力股份有限公司海门电厂 | A kind of power plant neighbour machine HV auxiliary power s ystem is mutually for system |
| CN209658909U (en) * | 2019-05-24 | 2019-11-19 | 广东红海湾发电有限公司 | A kind of Auxiliary System in Power Plant interacted system |
| CN209881489U (en) * | 2019-06-13 | 2019-12-31 | 中国神华能源股份有限公司 | Power supply system |
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2020
- 2020-04-17 CN CN202010305435.2A patent/CN111478425B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9467006B2 (en) * | 2013-09-23 | 2016-10-11 | Trippe Manufacturing Company | Automatic transfer switch for three-phase applications |
| CN204696788U (en) * | 2015-06-08 | 2015-10-07 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of large-size thermal power plant high-voltage Auxiliary power supply three power supply automatic switchover wiring construction |
| CN209658908U (en) * | 2019-05-24 | 2019-11-19 | 华能国际电力股份有限公司海门电厂 | A kind of power plant neighbour machine HV auxiliary power s ystem is mutually for system |
| CN209658909U (en) * | 2019-05-24 | 2019-11-19 | 广东红海湾发电有限公司 | A kind of Auxiliary System in Power Plant interacted system |
| CN209881489U (en) * | 2019-06-13 | 2019-12-31 | 中国神华能源股份有限公司 | Power supply system |
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