CN112865077B - Locking method of factory power system switch in hand-in-hand mode - Google Patents

Locking method of factory power system switch in hand-in-hand mode Download PDF

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Publication number
CN112865077B
CN112865077B CN202110044965.0A CN202110044965A CN112865077B CN 112865077 B CN112865077 B CN 112865077B CN 202110044965 A CN202110044965 A CN 202110044965A CN 112865077 B CN112865077 B CN 112865077B
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China
Prior art keywords
unit
switch
standby
inlet wire
incoming line
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CN202110044965.0A
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CN112865077A (en
Inventor
张少鹏
王团结
张亚夫
杜宇
何信林
杨萍
邵云鹏
杨志龙
郭沛
罗强
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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Classifications

    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • 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
    • 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

Abstract

The invention discloses a locking method of a station power system switch in a hand-in-hand manner, which comprises a station power system of a No. 1 unit and a station power system of a No. 2 unit, wherein the station power system of the No. 1 unit comprises a station power transformer of the No. 1 unit, a 6kV working inlet wire switch of the No. 1 unit, a 6kV section bus voltage transformer of the No. 1 unit and a 6kV standby inlet wire switch of the No. 1 unit, and the station power system of the No. 2 unit comprises a station power transformer of the No. 2 unit, a 6kV working inlet wire switch of the No. 2 unit, a 6kV section bus voltage transformer of the No. 2 unit and a 6kV standby inlet wire switch of the No. 2 unit. According to the system and the method, the locking of each switch can be realized by modifying the switching-on logic of each unit working incoming line switch and the standby incoming line switch in the DCS, so that the situation that the power switch of the plant is switched on by mistake in a non-synchronization mode is avoided.

Description

Locking method of factory power system switch in hand-in-hand mode
Technical Field
The invention belongs to the technical field of electric power debugging and electric power test, and relates to a locking method of a factory power system switch in a hand-in-hand mode.
Background
The conventional power plant factory system is powered by a factory work power supply and a factory standby power supply, the factory power supply is provided by a factory transformer of the machine set, and the standby power supply is provided by a special start-up transformer. The hand-in-hand mode means that two high-power plants of the machine set can mutually provide standby power without starting equipment change.
The hand-in-hand wiring mode is early in the design of part of thermal power plants, and can be reliably completed through multiple accident switching. At present, most of newly built gas power plant systems are designed in a hand-in-hand mode, and start-up and standby changes are not designed. The two unit factory systems mutually provide standby power sources for accident shutdown and shutdown maintenance in a hand-in-hand mode. When two unit plant sections are charged by a contact bus or a quick-cutting device is in fault and other special conditions, manual operation is needed to complete power supply to the other unit, and at the moment, the working inlet wire and the standby inlet wire switch of the same unit are switched on by DCS, so that hard wiring locking between the working inlet wire and the standby inlet wire is not needed, and the situation that the power switch of the plant is switched on by mistake in a non-synchronization mode can occur under the condition.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a locking method of a power supply system switch for a factory in a hand-in-hand mode, which can effectively avoid the non-synchronous error closing state of the power supply switch for the factory.
In order to achieve the purpose, the locking method of the station power system switch in the hand-in-hand mode comprises a station power system of a No. 1 unit and a station power system of a No. 2 unit.
The station service system of the No. 1 unit comprises a station service transformer (T1) of the No. 1 unit, a 6kV working incoming line switch (61 AN) of the No. 1 unit, a 6kV IA section bus voltage transformer (TV 1) of the No. 1 unit and a 6kV standby incoming line switch (61 AE) of the No. 1 unit.
The station service power system of the No. 2 machine set comprises a station service transformer (T2) of the No. 2 machine set, a 6kV working incoming line switch (62 AN) of the No. 2 machine set, a 6kV section IIA bus voltage transformer (TV 2) of the No. 2 machine set and a 6kV standby incoming line switch (62 AE) of the No. 2 machine set.
The high-voltage transformer (T1) of the No. 1 unit is connected with a No. 1 unit 6kV IA section bus through a No. 1 unit 6kV working incoming line switch (61 AN) switch, and a No. 1 unit 6kV IA section bus voltage transformer (TV 1) is connected with a No. 1 unit 6kV IA section bus.
The high-voltage transformer (T2) of the No. 2 machine set is connected with a No. 2 machine set 6kV IIA section bus through a No. 2 machine set 6kV working incoming line switch (62 AN), and a No. 2 machine set 6kV IIA section bus voltage transformer (TV 2) is connected with a No. 2 machine set 6kV IIA section bus.
The 6kV section IA bus of the No. 1 unit is connected with the 6kV section IIA bus of the No. 2 unit through a 6kV standby incoming line switch (61 AE) of the No. 1 unit and a 6kV standby incoming line switch (62 AE) of the No. 2 unit.
The specific implementation process of the allowable conditions of the 6kV working inlet wire switch (61 AN) of the No. 1 unit, the 6kV standby inlet wire switch (61 AE) of the No. 1 unit, the 6kV working inlet wire switch (62 AN) of the No. 2 unit and the 6kV standby inlet wire switch (62 AE) of the No. 2 unit are as follows: and the remote operation of the switch is closed and locked by modifying DCS logic.
The DCS logic is specifically modified as follows:
the switching-on permission logic of a 6kV working incoming line switch (61 AN) of the No. 1 unit is CEG;
6kV standby incoming line switch (61 AE) switching-on permission logic of No. 1 unit is as follows
The switching-on permission logic of a 6kV working incoming line switch (62 AN) of the No. 2 unit is DFG;
the switching-on permission logic of a 6kV standby incoming line switch (62 AE) of the No. 2 unit is CG;
wherein A represents the 6kV working inlet wire switch (61 AN) of the No. 1 unit and is in a disconnecting state, B represents the 6kV working inlet wire switch (62 AN) of the No. 2 unit and is in a disconnecting state, C represents the 6kV standby inlet wire switch (61 AE) of the No. 1 unit and is in a disconnecting state, D represents the 6kV standby inlet wire switch (62 AE) of the No. 2 unit and is in a disconnecting state, E represents the 6kV IA section bus voltage transformer (TV 1) of the No. 1 unit and is not under voltage, F represents the 6kV IIA section bus voltage transformer (TV 2) of the No. 2 unit and is not under voltage, and G represents other conditions of switching on of the respective switches.
G indicates that the switch is in a remote state.
G represents the switch operating position.
G represents no alarm of the switch.
The invention has the following beneficial effects:
according to the locking method of the station power system switch in the hand-in-hand mode, when the station power system switch is specifically operated, locking of each switch is achieved through modification of the switching-on logic of each unit work incoming line switch and each standby incoming line switch in the DCS, the situation that the station power switch is not switched on in the same period in error is avoided, new equipment is not required to be purchased, only the existing DCS logic is modified, operation risks of power plant operators are reduced, and safe and stable operation reliability of the power plant is improved.
Drawings
FIG. 1 is a schematic diagram of a system of the present invention;
FIG. 2 is a logic diagram of the present invention;
wherein T1 is a high-voltage transformer of a No. 1 unit, 61AN is a 6kV working incoming line switch of the No. 1 unit, TV1 is a 6kV IA section bus voltage transformer of the No. 1 unit, and 61AE is a 6kV standby incoming line switch of the No. 1 unit; t2 is a high-voltage transformer of the No. 2 machine set, 62AN is a 6kV working incoming line switch of the No. 2 machine set, TV2 is a 6kV IIA section bus voltage transformer of the No. 2 machine set, and 62AE is a 6kV standby incoming line switch of the No. 2 machine set.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the factory power system in a hand-in-hand manner comprises a high factory transformer T1 of a No. 1 unit, a 6kV working incoming line switch 61AN of the No. 1 unit, a 6kV section IA bus voltage transformer TV1 of the No. 1 unit and a 6kV standby incoming line switch 61AE of the No. 1 unit; no. 2 high-voltage transformer T2, no. 2 set 6kV working incoming line switch 62AN, no. 2 set 6kV IIA section bus voltage transformer TV2, no. 2 set 6kV standby incoming line switch 62AE.
The high-voltage transformer T1 of the No. 1 unit is connected with a No. 1 unit 6kV IA section bus through a No. 1 unit 6kV working incoming line switch 61AN switch, and the No. 1 unit 6kV section bus voltage transformer TV1 is connected with a No. 1 unit 6kV section bus.
The high-power plant transformer T2 of the No. 2 machine set is connected with a No. 2 machine set 6kV IIA section bus through a No. 2 machine set 6kV working incoming line switch 62AN, and the No. 2 machine set 6kV IIA section bus voltage transformer TV2 is connected with a No. 2 machine set 6kV IIA section bus.
The 6kV IA section bus of the No. 1 unit is connected with the 6kV IIA section bus of the No. 2 unit through a 6kV standby inlet wire switch 61AE of the No. 1 unit and a 6kV standby inlet wire switch 62AE of the No. 2 unit.
Referring to fig. 2, the locking method of the factory power system switch in the hand-in-hand manner specifically modifies DCS logic as follows:
wherein, the switching-on permission logic of the 6kV working inlet wire switch 61AN of the No. 1 unit is CEG;
6kV standby incoming line switch 61AE switching-on permission logic of No. 1 unit is as follows
The switching-on permission logic of the 6kV working inlet switch 62AN of the No. 2 unit is DFG;
the 6kV standby incoming line switch 62AE switching-on permission logic of the No. 2 unit is CG;
wherein A represents the 6kV working inlet wire switch 61AN of the No. 1 unit and the switch-off state, B represents the 6kV working inlet wire switch 62AN of the No. 2 unit and the switch-off state, C represents the 6kV standby inlet wire switch 61AE of the No. 1 unit and the switch-off state, D represents the 6kV standby inlet wire switch 62AE of the No. 2 unit and the switch-off state, E represents the no-voltage state of the 6kV IA section bus voltage transformer TV1 of the No. 1 unit, F represents the no-voltage state of the 6kV IIA section bus voltage transformer TV2 of the No. 2 unit and G represents other conditions of switching on of the respective switches.
G indicates that the switch is in a remote state.
G represents the switch operating position.
G represents no alarm of the switch.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.

Claims (1)

1. A locking method of a station power system switch in a hand-in-hand manner is characterized in that a station power system of a No. 1 unit and a station power system of a No. 2 unit are mutually provided with standby power in the hand-in-hand manner;
the station service power system of the No. 1 unit comprises a station high-voltage transformer (T1) of the No. 1 unit, a 6kV working incoming line switch (61 AN) of the No. 1 unit, a 6kV section IA bus voltage transformer (TV 1) of the No. 1 unit and a 6kV standby incoming line switch (61 AE) of the No. 1 unit;
the station service power system of the No. 2 machine set comprises a station service transformer (T2) of the No. 2 machine set, a 6kV working incoming line switch (62 AN) of the No. 2 machine set, a 6kV section IIA bus voltage transformer (TV 2) of the No. 2 machine set and a 6kV standby incoming line switch (62 AE) of the No. 2 machine set;
the high-voltage transformer (T1) of the No. 1 unit is connected with a No. 1 unit 6kV IA section bus through a No. 1 unit 6kV working inlet wire switch (61 AN), and a No. 1 unit 6kV IA section bus voltage transformer (TV 1) is connected with a No. 1 unit 6kV IA section bus; the high-voltage transformer (T2) of the No. 2 unit is connected with a No. 2 unit 6kV IIA section bus through a No. 2 unit 6kV working incoming line switch (62 AN), and a No. 2 unit 6kV IIA section bus voltage transformer (TV 2) is connected with a No. 2 unit 6kV IIA section bus;
the 6kV section IA bus of the No. 1 unit is connected with the 6kV section IIA bus of the No. 2 unit through a 6kV standby incoming line switch (61 AE) of the No. 1 unit and a 6kV standby incoming line switch (62 AE) of the No. 2 unit;
setting a switching-on permission condition of a 6kV working inlet wire switch (61 AN) of a No. 1 unit, a 6kV standby inlet wire switch (61 AE) of the No. 1 unit, a 6kV working inlet wire switch (62 AN) of a No. 2 unit and a 6kV standby inlet wire switch (62 AE) of the No. 2 unit;
the switching-on locking of remote operation of each switch is realized by modifying DCS logic, and the switching-on permission conditions of a 6kV working inlet wire switch (61 AN) of a No. 1 unit, a 6kV standby inlet wire switch (61 AE) of a No. 1 unit, a 6kV working inlet wire switch (62 AN) of a No. 2 unit and a 6kV standby inlet wire switch (62 AE) of a No. 2 unit are met;
the DCS logic is modified as follows:
the switching-on permission logic of a 6kV working incoming line switch (61 AN) of the No. 1 unit is CEG;
6kV standby incoming line switch (61 AE) switching-on permission logic of No. 1 unit is as follows
The switching-on permission logic of a 6kV working incoming line switch (62 AN) of the No. 2 unit is DFG;
the switching-on permission logic of a 6kV standby incoming line switch (62 AE) of the No. 2 unit is CG;
wherein A represents a 6kV working inlet wire switch (61 AN) opening state of a No. 1 unit, B represents a 6kV working inlet wire switch (62 AN) opening state of a No. 2 unit, C represents a 6kV standby inlet wire switch (61 AE) opening state of a No. 1 unit, D represents a 6kV standby inlet wire switch (62 AE) opening state of a No. 2 unit, E represents a 6kV IA section bus voltage transformer (TV 1) of a No. 1 unit without voltage, F represents a 6kV IIA section bus voltage transformer (TV 2) of a No. 2 unit without voltage, and G represents other conditions that each switch has closing;
g represents the operating position, remote position and no fault condition of the respective switch.
CN202110044965.0A 2021-01-13 2021-01-13 Locking method of factory power system switch in hand-in-hand mode Active CN112865077B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203352172U (en) * 2013-07-25 2013-12-18 湖南省电力勘测设计院 Auxiliary power wiring structure for large thermal power plant
US9047076B1 (en) * 2013-12-31 2015-06-02 Victor K. J. Lee Uninterruptable power supply system and method
CN206790126U (en) * 2017-05-23 2017-12-22 广州市宏大欣电子科技有限公司 A kind of power plant low pressure annular station service and haul oneself willingly into control system
CN110401194A (en) * 2019-08-15 2019-11-01 西安热工研究院有限公司 A kind of fast cutting system of three power supply of Combined cycle gas-steam turbine distributed energy and method
CN111711261A (en) * 2020-07-02 2020-09-25 陕西榆林能源集团横山煤电有限公司 Method for manually switching factory power supply to different network power supply and automatically judging

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203352172U (en) * 2013-07-25 2013-12-18 湖南省电力勘测设计院 Auxiliary power wiring structure for large thermal power plant
US9047076B1 (en) * 2013-12-31 2015-06-02 Victor K. J. Lee Uninterruptable power supply system and method
CN206790126U (en) * 2017-05-23 2017-12-22 广州市宏大欣电子科技有限公司 A kind of power plant low pressure annular station service and haul oneself willingly into control system
CN110401194A (en) * 2019-08-15 2019-11-01 西安热工研究院有限公司 A kind of fast cutting system of three power supply of Combined cycle gas-steam turbine distributed energy and method
CN111711261A (en) * 2020-07-02 2020-09-25 陕西榆林能源集团横山煤电有限公司 Method for manually switching factory power supply to different network power supply and automatically judging

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