CN109245291B - Maintenance safety measure arrangement method for double-bus double-subsection power supply system of transformer substation - Google Patents
Maintenance safety measure arrangement method for double-bus double-subsection power supply system of transformer substation Download PDFInfo
- Publication number
- CN109245291B CN109245291B CN201811358617.5A CN201811358617A CN109245291B CN 109245291 B CN109245291 B CN 109245291B CN 201811358617 A CN201811358617 A CN 201811358617A CN 109245291 B CN109245291 B CN 109245291B
- Authority
- CN
- China
- Prior art keywords
- bus
- overhauled
- section
- power supply
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012423 maintenance Methods 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 1
- 208000027418 Wounds and injury Diseases 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 4
- 208000014674 injury Diseases 0.000 abstract description 4
- 230000011218 segmentation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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
- 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
-
- 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
Landscapes
- 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 maintenance safety measure arrangement method for a double-bus double-subsection power supply system of a transformer substation. The method comprises the following steps: 11) carrying out loop closing and bus reversing operations on the bus; 12) switching a low-voltage alternating current power supply; 13) switching each switch cabinet of the bus to be overhauled to a hot standby state; 14) switching each switch cabinet to a cold standby state; 15) switching the voltage transformer to a cold standby state; 16) switching the station transformer to a cold standby state; 17) installing a grounding wire; 18) disconnecting the direct-current power supply screen, and removing a direct-current control power supply breaker and a closing power supply breaker of the bus to be overhauled; 19) and disconnecting the low-voltage AC screen to the low-voltage AC circuit breakers of the switch cabinets of the buses to be overhauled. The maintenance safety measure arrangement method of the power supply system has the advantages of fast and efficient switching operation, complete and complete maintenance safety measure arrangement, can effectively avoid switching misoperation and personal injury accidents, and ensures the safety of equipment maintenance operation.
Description
Technical Field
The invention relates to the technical field of power supply of transformer substations, in particular to a maintenance safety measure arrangement method of a double-bus double-subsection power supply system of a transformer substation.
Background
Fig. 1 is a schematic diagram illustrating a primary system principle of a transformer substation double-bus double-section power supply system in accordance with an example. As shown in the attached figure 1, a double-bus double-subsection power supply system of a transformer substation has I, II, III and IV four-section buses in common, when the transformer substation is in normal power supply operation, a 1# main transformer is connected with the I-section buses and each feed-out line through a 3501 circuit breaker, a 2# main transformer is connected with the II-section buses and each feed-out line through a 3502 circuit breaker, a 3# main transformer is connected with the III-section buses and each feed-out line through a 3503 circuit breaker, a 4# main transformer is connected with the IV-section buses and each feed-out line through a 3504 circuit breaker, a I-section voltage transformer is connected with the I-section buses, a II-section voltage transformer is connected with the II-section buses, a 1# station transformer is respectively connected with the I-section buses and the II-section buses through a high-voltage side isolating switch thereof, a III-section voltage transformer (not shown in the figure) is connected with the III-section buses, an IV-section voltage transformer (not shown in the figure) is connected with the IV-section buses, a 2# station transformer is respectively connected with the III-section buses and the IV-section buses through a high-section isolating switch thereof, i section generating line and III section generating line segmentation 3500E, II section generating line and IV section generating line segmentation 3500F, I section generating line and II section generating line bus-coupling 3500A, III section generating line and IV section generating line bus-coupling 3500B, 3500B is in hot standby state.
The transformer substation needs to be cleaned and overhauled electrically to the transformation and distribution equipment in spring and autumn two times every year, because the system structure of the double-bus double-section power supply system of the existing transformer substation is complicated, during equipment overhaul, the switching operation amount is large, the operation safety risk is high, the overhaul safety measure is arranged in a complicated manner, the positions of reverse power transmission or possible incoming calls are many, misoperation occurs easily, the safety of overhaul personnel is endangered, and personal injury accidents are even caused. Therefore, it is necessary to provide a safety measure arrangement method which is accurate in switching and can realize rapid and safe maintenance.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a maintenance safety measure arrangement method for a double-bus double-subsection power supply system of a transformer substation.
Therefore, the invention discloses a maintenance safety measure arrangement method of a double-bus double-subsection power supply system of a transformer substation. The method comprises the following steps:
11) carrying out loop closing operation on four sections of buses of the I section, the II section, the III section and the IV section, and adjusting the loads of two sections of buses to be overhauled to be supplied with power by the other two sections of buses;
12) switching a low-voltage alternating-current power supply, switching a low-voltage alternating-current screen of a power supply system from a station transformer station inner low-voltage load connected with the bus to be overhauled to another station transformer station inner low-voltage load for supplying power, and disconnecting an alternating-current incoming line breaker connected with a station transformer station lower-voltage side connected with the bus to be overhauled in the low-voltage alternating-current screen;
13) switching each switch cabinet of the bus to be overhauled from an operating state to a hot standby state;
14) switching each switch cabinet of the bus to be overhauled from a hot standby state to a cold standby state;
15) switching the voltage transformer connected with the bus to be overhauled from a hot standby state to a cold standby state;
16) switching the station transformer connected with the bus to be overhauled from a hot standby state to a cold standby state;
17) carrying out installation operation of a grounding wire on the power supply system to be overhauled;
18) disconnecting the direct-current power supply screen, and removing the direct-current control power supply circuit breaker and the closing power supply circuit breaker of the bus to be overhauled;
19) and disconnecting the low-voltage AC screen, and removing the low-voltage AC circuit breakers of the switch cabinets of the bus to be overhauled.
Further, in the overhaul safety measure arrangement method of the substation double-bus double-section power supply system, the step 12 is performed in the gap of the bus closing and load shedding.
Further, in the method for arranging overhaul safety measures of the double-bus double-subsection power supply system of the transformer substation, the step 13 further includes respectively checking and confirming that each feed-out line of the to-be-overhauled bus has no load before each switch cabinet of the to-be-overhauled bus is switched from the operating state to the hot standby state.
Further, in the method for arranging overhaul safety measures in the double-bus double-section power supply system of the transformer substation, in step 13, switching each switch cabinet of the bus to be overhauled from the operating state to the hot standby state includes: and the circuit breakers of the outgoing line switch cabinets of the buses to be overhauled are sequentially disconnected, the circuit breakers at the high-low voltage sides of the main transformers connected with the buses to be overhauled are disconnected, and the circuit breakers of the I-section buses, the III-section buses, the II-section buses and the IV-section buses, and the bus-tie of the buses to be overhauled are sequentially disconnected.
Further, in the method for arranging overhaul safety measures in the dual-bus dual-segment power supply system of the substation, in step 14, switching each switch cabinet of the bus to be overhauled from the hot standby state to the cold standby state includes: disconnecting-3, -1 and-2 disconnecting switches of the outgoing line switch cabinets of the buses to be overhauled in sequence, disconnecting the disconnecting switches on two sides of the main transformer high-low voltage circuit breakers connected with the buses to be overhauled, and disconnecting 3500E sections of the buses in the I section and the III section, 3500F sections of the buses in the II section and the IV section, and the disconnecting switches of the bus coupler of the buses to be overhauled.
Further, in the method for arranging overhaul safety measures in the double-bus and double-section power supply system of the transformer substation, in the step 15, switching the voltage transformer connected to the bus to be overhauled from the hot standby state to the cold standby state includes: disconnecting the isolating switches of the voltage transformers connected with the bus to be overhauled, and taking down the fuses on the high and low voltage sides of each voltage transformer.
Further, in the repair safety measure arrangement method for the substation double-bus double-section power supply system, in the step 16, switching the station transformer connected to the busbar to be repaired from a hot standby state to a cold standby state includes: disconnecting each isolating switch for the station and each outgoing line breaker on the low-voltage side of the isolating switch connected with the bus to be overhauled, and taking down the fuse on the high-voltage side for the station connected with the bus to be overhauled.
Further, in the method for arranging overhaul safety measures of the double-bus double-section power supply system of the transformer substation, in the step 17, the operation of installing the ground wire to the power supply system to be overhauled includes: respectively installing a group of ground wires on the load side of a-3 isolating switch circuit of each outgoing feeder switch cabinet of the bus to be overhauled, respectively installing a group of ground wires on the bus to be overhauled, respectively installing a group of ground wires at the bridge of each main transformer low-voltage side bus connected with the bus to be overhauled, respectively installing a group of ground wires at the bus bar connecting between the-1 isolating switch of the I-section bus and the III-section bus section 3500E and the circuit breaker, respectively installing a group of ground wires at the bus bar connecting between the-1 isolating switch of the II-section bus and the IV-section bus section 3500F and the circuit breaker, and respectively installing a group of ground wires at the two sides of the station used for changing high voltage and low voltage connected with the bus to be overhauled.
Further, in the arrangement method of the overhaul safety measures of the double-bus double-subsection power supply system of the transformer substation, in the step 17, the part of the to-be-overhauled bus, which is provided with the grounding wire, is the power supply side of the isolating switch of the voltage transformer, which is connected with the to-be-overhauled bus.
Further, in the arrangement method of the overhaul safety measures of the double-bus double-section power supply system of the transformer substation, the step 17 further includes checking and confirming whether a part of the power supply system where the ground wire is to be installed has no voltage before the power supply system is subjected to the operation of installing the ground wire.
The technical scheme of the invention has the following main advantages:
the overhaul safety measure arrangement method of the double-bus double-subsection power supply system of the transformer substation, provided by the invention, has the advantages that switching operation is rapid and efficient, overhaul safety measures are complete and complete in arrangement, switching misoperation and personal injury accidents can be effectively avoided, equipment overhaul operation safety is ensured, overhaul efficiency is high, operation is convenient, and safety and reliability are realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram illustrating a primary system principle of a dual-bus dual-section power supply system of a transformer substation according to the prior art provided by way of example;
fig. 2 is a flowchart of a method for arranging overhaul safety measures of a double-bus and double-section power supply system of a transformer substation according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
As shown in the attached figure 1, a double-bus double-subsection power supply system of a transformer substation has I, II, III and IV four-section buses in common, when the transformer substation is in normal power supply operation, a 1# main transformer is connected with the I-section buses and each feed-out line through a 3501 circuit breaker, a 2# main transformer is connected with the II-section buses and each feed-out line through a 3502 circuit breaker, a 3# main transformer is connected with the III-section buses and each feed-out line through a 3503 circuit breaker, a 4# main transformer is connected with the IV-section buses and each feed-out line through a 3504 circuit breaker, a I-section voltage transformer is connected with the I-section buses, a II-section voltage transformer is connected with the II-section buses, a 1# station transformer is respectively connected with the I-section buses and the II-section buses through a high-voltage side isolating switch thereof, a III-section voltage transformer (not shown in the figure) is connected with the III-section buses, an IV-section voltage transformer (not shown in the figure) is connected with the IV-section buses, a 2# station transformer is respectively connected with the III-section buses and the IV-section buses through a high-section isolating switch thereof, i section generating line and III section generating line segmentation 3500E, II section generating line and IV section generating line segmentation 3500F, I section generating line and II section generating line bus-coupling 3500A, III section generating line and IV section generating line bus-coupling 3500B, 3500B is in hot standby state. In the figure, the-1, -2 and-3 are all indicated as the numbers of the disconnecting switches matched with the circuit breaker.
As shown in fig. 2, an embodiment of the present invention provides an overhaul safety measure arrangement method for a double-bus double-segment power supply system of a transformer substation, where the overhaul safety measure arrangement method includes the following steps:
11) carrying out loop closing operation on four sections of buses of the I section, the II section, the III section and the IV section, and adjusting the loads of two sections of buses to be overhauled to be supplied with power by the other two sections of buses;
12) switching a low-voltage alternating current power supply, switching a low-voltage alternating current screen of a power supply system from a station transformer station low-voltage load connected with a bus to be overhauled to another station transformer station low-voltage load for supplying power, and disconnecting an alternating current incoming line breaker connected with a station transformer station low-voltage side connected with the bus to be overhauled in the low-voltage alternating current screen;
13) switching each switch cabinet of the bus to be overhauled from an operating state to a hot standby state;
14) switching each switch cabinet of the bus to be overhauled from a hot standby state to a cold standby state;
15) switching a voltage transformer connected with a bus to be overhauled from a hot standby state to a cold standby state;
16) switching a station utilization transformer connected with a bus to be overhauled from a hot standby state to a cold standby state;
17) carrying out installation operation of a grounding wire on a power supply system to be overhauled;
18) disconnecting the direct-current power supply screen, and removing a direct-current control power supply breaker and a closing power supply breaker of the bus to be overhauled;
19) and disconnecting the low-voltage AC screen to the low-voltage AC circuit breakers of the switch cabinets of the buses to be overhauled.
More specifically, the overhaul safety measure arrangement method for the double-bus double-section of the transformer substation comprises the following steps:
21) carrying out loop closing operation on four sections of buses of the I section, the II section, the III section and the IV section, and adjusting the loads of two sections of buses to be overhauled to be supplied with power by the other two sections of buses;
22) switching a low-voltage alternating current power supply in a gap of bus loop closing reverse loads, switching a low-voltage alternating current screen of a power supply system from a station-used variable power supply station low-voltage load connected with a bus to be overhauled to another station-used variable power supply station low-voltage load, and disconnecting an alternating current incoming line breaker connected with a station-used variable voltage side connected with the bus to be overhauled in the low-voltage alternating current screen;
23) after checking and confirming that each outgoing line of the to-be-overhauled bus is unloaded, sequentially disconnecting the circuit breakers of the outgoing line switch cabinets of the to-be-overhauled bus, disconnecting the circuit breakers at the high-low voltage side of each main transformer connected with the to-be-overhauled bus, and sequentially disconnecting 3500E sections of I section buses and III section buses, 3500F sections of II section buses and IV section buses and the circuit breakers of the bus connection of the to-be-overhauled bus, so that each switch cabinet of the to-be-overhauled bus is switched to a hot standby state from a running state;
24) disconnecting-3, -1 and-2 disconnecting switches of all outgoing line switch cabinets of the bus to be overhauled in sequence, disconnecting the disconnecting switches on two sides of each main transformer high-low voltage circuit breaker connected with the bus to be overhauled, disconnecting 3500E sections of I and III sections of the bus, 3500F sections of II and IV sections of the bus and each disconnecting switch of a bus connection of the bus to be overhauled, and thus switching each switch cabinet of the bus to be overhauled from a hot standby state to a cold standby state;
25) disconnecting the isolating switches of the voltage transformers connected with the bus to be overhauled, and taking down the fuses on the high and low voltage sides of each voltage transformer, so that the voltage transformers connected with the bus to be overhauled are switched from a hot standby state to a cold standby state;
26) disconnecting each isolating switch of the station transformer connected with the bus to be overhauled and each outgoing line breaker on the low-voltage side of the isolating switch, and taking down a high-voltage side fuse of the station transformer connected with the bus to be overhauled, so that the station transformer connected with the bus to be overhauled is switched from a hot standby state to a cold standby state;
27) checking and confirming whether a part to be provided with a ground wire in a power supply system has no voltage, respectively arranging a group of ground wires on the load side of a-3 isolating switch line of each feed-out line switch cabinet of a bus to be overhauled after confirming that no voltage exists, respectively arranging a group of ground wires on the bus to be overhauled, respectively arranging a group of ground wires on a bus bridge at the low-voltage side of each main transformer connected with the bus to be overhauled, respectively arranging a group of ground wires on a-1 isolating switch of a first-section bus segment 3500E and a bus bar connected between circuit breakers, arranging a group of ground wires on a-1 isolating switch of a second-section bus segment 3500F and a bus bar connected between the circuit breakers, and respectively arranging a group of ground wires on both sides of a station connected with the bus to be overhauled;
28) disconnecting the direct-current power supply screen, and removing a direct-current control power supply breaker and a closing power supply breaker of the bus to be overhauled;
29) and disconnecting the low-voltage AC screen to the low-voltage AC circuit breakers of the switch cabinets of the buses to be overhauled.
In step 27, the part of the bus to be overhauled, which is provided with the ground wire, may be a power supply side of the isolating switch of the voltage transformer connected to the bus to be overhauled.
The method for arranging maintenance safety measures of the double-bus double-section power supply system of the transformer substation provided by the embodiment of the invention is specifically described below by taking the example of performing power-off electric cleaning maintenance on the first-section bus equipment and the second-section bus equipment in the double-bus double-section power supply system of the transformer substation.
Specifically, when power failure maintenance is performed on two sections of bus equipment, namely a section I bus equipment and a section II bus equipment, in a power supply system, the maintenance safety measure arrangement method comprises the following steps:
31) carrying out loop closing on the first-section bus and the third-section bus, adjusting the load of the first-section bus to be supplied with power by the third-section bus, carrying out loop closing on the second-section bus and the IV-section bus, and adjusting the load of the second-section bus to be supplied with power by the IV-section bus;
32) switching a low-voltage alternating current power supply in a gap of bus loop closing reverse load, switching a low-voltage alternating current screen of a power supply system from a low-voltage load in a variable power supply station for a station 1 connected with a bus in a section I and a bus in a section II to a variable power supply station for a station 2 connected with a bus in a section III and a bus in a section IV, and then disconnecting a 1# alternating current incoming line breaker connected with a low-voltage side for the station 1 connected with the bus in the section I and the bus in the section II in the low-voltage alternating current screen;
33) after checking and confirming that the feeding-out wires of the first-section bus and the second-section bus are all unloaded, the circuit breakers of the feeding-out switch cabinets of the first-section bus and the second-section bus are sequentially disconnected, the high-low voltage two-side circuit breakers of a 1# main transformer and a 2# main transformer connected with the first-section bus and the second-section bus are disconnected, the circuit breakers of a 3500E section of the first-section bus and a 3500E section of the III section bus, a 3500F section of the second-section bus and a IV section bus and a 3500A bus connector of the first-section bus and the second-section bus are sequentially disconnected, and then whether the circuit breakers are disconnected or not is respectively checked and confirmed.
34) The isolating switches of-3, -1 and-2 of the feed-out line switch cabinets of the first section of the bus and the second section of the bus are sequentially disconnected, the isolating switches of-1, -2 and-3 at two sides of a 1# main transformer and a 2# main transformer high-low voltage circuit breaker connected with the first section of the bus and the second section of the bus are disconnected, the isolating switches of-1 and-2 of the I section of the bus and the III section of the bus section 3500E are disconnected, the isolating switches of-1 and-2 of the II section of the bus and the IV section of the bus section 3500F are disconnected, and the isolating switches of-1 and-2 of the busbar connection 3500A of the I section of the bus and the II section of the bus are disconnected;
35) disconnecting a 3581-1 isolating switch of a first-section voltage transformer connected with a first-section bus, disconnecting a 3582-1 isolating switch of a second-section voltage transformer connected with a second-section bus, and respectively and sequentially removing high-voltage and low-voltage two-side fuses of the first-section voltage transformer and the second-section voltage transformer so as to prevent the low voltage on the secondary side from transmitting electricity back to the primary side of the voltage transformer;
36) disconnecting 3591-1 and 3591-2 disconnecting switches for a 1# station, which are connected with the I section bus and the II section bus, disconnecting low-voltage side outgoing line breakers for the 1# station, and removing a high-voltage side fuse for the 1# station to prevent low-voltage alternating current from being reversely transmitted;
37) checking and confirming whether the part to be provided with the grounding wire has no voltage, respectively arranging a group of grounding wires on the load side of a-3 isolating switch circuit of each feed-out switch cabinet of a first-section bus and a second-section bus after verifying and confirming that no voltage exists, respectively arranging a group of grounding wires on the first-section bus and the second-section bus, respectively arranging a group of grounding wires at the low-voltage side bus bridge of a 1# main transformer and a 2# main transformer connected with the first-section bus and the second-section bus, respectively arranging a group of grounding wires at the connecting bus bar between the-1 isolating switch and a circuit breaker of a 3500E first-section bus and a third-section bus, respectively arranging a group of grounding wires at the connecting bus bar between the-1 isolating switch and the circuit breaker of a 3500F of the second-section bus and the IV-section bus, and respectively arranging a group of grounding wires at the two sides of the 1# station connected with the first-section bus and the second-section bus by using high voltage and low voltage;
38) disconnecting the direct-current power supply screen, and removing the direct-current control power supply circuit breaker and the closing power supply circuit breaker of the first section of bus and the second section of bus;
39) and disconnecting the low-voltage AC screen, and removing the low-voltage AC circuit breakers of the switch cabinets of the first section of bus and the second section of bus.
According to the maintenance safety measure arrangement method for the double-bus double-subsection power supply system of the transformer substation, switching operation is rapid and efficient, maintenance safety measures are complete and complete in arrangement, switching misoperation and personal injury accidents can be effectively avoided, equipment maintenance operation safety is guaranteed, maintenance efficiency is high, operation is convenient, and safety and reliability are achieved.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (1)
1. A method for arranging overhaul safety measures of a double-bus double-subsection power supply system of a transformer substation is characterized by comprising the following steps of:
11) carrying out loop closing operation on four sections of buses of the I section, the II section, the III section and the IV section, and adjusting the loads of two sections of buses to be overhauled to be supplied with power by the other two sections of buses;
12) switching a low-voltage alternating current power supply in a gap of bus loop closing reverse load, switching a low-voltage alternating current screen of a power supply system from a station-used variable power supply station low-voltage load connected with a bus to be overhauled to another station-used variable power supply station low-voltage load, and disconnecting an alternating current incoming line breaker connected with a station-used low-voltage side connected with the bus to be overhauled in the low-voltage alternating current screen;
13) switching each switch cabinet of the bus to be overhauled from an operating state to a hot standby state;
wherein, with each cubical switchboard of pending maintenance generating line is switched to hot standby state by the running state, include: after checking and confirming that each outgoing line of the to-be-overhauled bus is unloaded, sequentially disconnecting the circuit breakers of the outgoing line switch cabinets of the to-be-overhauled bus, disconnecting the circuit breakers at the high-low voltage side and the low-voltage side of each main transformer connected with the to-be-overhauled bus, and sequentially disconnecting 3500E sections of buses in the I section and the III section, 3500F sections of buses in the II section and the IV section, and circuit breakers of the bus connection of the to-be-overhauled bus;
14) switching each switch cabinet of the bus to be overhauled from a hot standby state to a cold standby state;
wherein, with each cubical switchboard of waiting to overhaul the generating line switch to cold standby state by hot standby state, include: disconnecting each disconnecting switch of each feeding-out line switch cabinet of the bus to be overhauled in sequence, disconnecting each disconnecting switch on two sides of each main transformer high-low voltage circuit breaker connected with the bus to be overhauled, and disconnecting each disconnecting switch of the bus segment I and the bus segment III 3500E, the bus segment II and the bus segment IV 3500F and the bus coupling of the bus to be overhauled;
15) switching the voltage transformer connected with the bus to be overhauled from a hot standby state to a cold standby state;
switching the voltage transformer connected with the bus to be overhauled from a hot standby state to a cold standby state comprises: disconnecting the isolating switches of the voltage transformers connected with the two sections of buses to be overhauled in sequence, and taking down the fuses on the high and low sides of the voltage transformers connected with the two sections of buses to be overhauled in sequence;
16) switching the station transformer connected with the bus to be overhauled from a hot standby state to a cold standby state;
switching the station transformer connected to the bus to be serviced from a hot standby state to a cold standby state comprises: disconnecting each disconnecting switch of the station transformer connected with the two sections of buses to be overhauled in sequence, disconnecting each outgoing line breaker of the low-voltage side of the station transformer connected with the two sections of buses to be overhauled in sequence, and taking down the high-voltage side fuses of the station transformer connected with the two sections of buses to be overhauled in sequence;
17) carrying out installation operation of a grounding wire on the power supply system to be overhauled;
the operation of installing the grounding wire on the power supply system to be overhauled comprises the following steps: respectively installing a group of ground wires on the load side of a-3 isolating switch circuit of each outgoing feeder switch cabinet of the bus to be overhauled, respectively installing a group of ground wires on a bus bridge at the low-voltage side of each main transformer connected with the bus to be overhauled, respectively installing a group of ground wires at a-1 isolating switch of a section I bus and a section III bus segment 3500E and a bus bar connecting circuit breakers, respectively installing a group of ground wires at a-1 isolating switch of a section II bus and a section IV bus segment 3500F and a bus bar connecting circuit breakers, respectively installing a group of ground wires on both sides of the station used for connecting the bus to be overhauled and the station used for connecting the bus to be overhauled, wherein the part on which the ground wires are installed on the bus to be overhauled is the power supply side of the isolating switch of the voltage, before the power supply system is subjected to the installation operation of the grounding wire, whether the part of the power supply system, which is to be provided with the grounding wire, has no voltage is checked and confirmed;
18) disconnecting the direct-current power supply screen, and removing the direct-current control power supply circuit breaker and the closing power supply circuit breaker of the bus to be overhauled;
19) and disconnecting the low-voltage AC screen, and removing the low-voltage AC circuit breakers of the switch cabinets of the bus to be overhauled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358617.5A CN109245291B (en) | 2018-11-15 | 2018-11-15 | Maintenance safety measure arrangement method for double-bus double-subsection power supply system of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358617.5A CN109245291B (en) | 2018-11-15 | 2018-11-15 | Maintenance safety measure arrangement method for double-bus double-subsection power supply system of transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109245291A CN109245291A (en) | 2019-01-18 |
| CN109245291B true CN109245291B (en) | 2021-08-27 |
Family
ID=65075312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811358617.5A Active CN109245291B (en) | 2018-11-15 | 2018-11-15 | Maintenance safety measure arrangement method for double-bus double-subsection power supply system of transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109245291B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271728A (en) * | 2020-10-15 | 2021-01-26 | 华能重庆珞璜发电有限责任公司 | Method for improving flexibility of thermal generator set switching station and operation method thereof |
| CN112787650B (en) * | 2020-12-30 | 2022-09-13 | 国网河北省电力有限公司 | Method and device for rapidly judging three-phase position of isolating switch |
| CN113902071B (en) * | 2021-09-29 | 2025-03-25 | 深圳市深能环保东部有限公司 | A transformer power supply line safety inspection device and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570612A (en) * | 2012-01-31 | 2012-07-11 | 广东电网公司中山供电局 | The Method of Programmed Operation of Intelligent Inverted Busbar |
| CN203895766U (en) * | 2014-06-20 | 2014-10-22 | 国家电网公司 | Double busbar and double subsection based substation main wiring system |
| CN107863690A (en) * | 2017-11-16 | 2018-03-30 | 四川电器集团股份有限公司 | A kind of switch cubicle control system and back brake method |
| CN108023351A (en) * | 2018-01-11 | 2018-05-11 | 山东钢铁股份有限公司 | The method and system of falling busbar of double-bus power supply |
-
2018
- 2018-11-15 CN CN201811358617.5A patent/CN109245291B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570612A (en) * | 2012-01-31 | 2012-07-11 | 广东电网公司中山供电局 | The Method of Programmed Operation of Intelligent Inverted Busbar |
| CN203895766U (en) * | 2014-06-20 | 2014-10-22 | 国家电网公司 | Double busbar and double subsection based substation main wiring system |
| CN107863690A (en) * | 2017-11-16 | 2018-03-30 | 四川电器集团股份有限公司 | A kind of switch cubicle control system and back brake method |
| CN108023351A (en) * | 2018-01-11 | 2018-05-11 | 山东钢铁股份有限公司 | The method and system of falling busbar of double-bus power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109245291A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1974430B1 (en) | A transmission system | |
| RU2414786C2 (en) | Power distribution system with individually isolated functional zones | |
| CN104333118A (en) | Spare power automatic switching system with self-adaptive switching intermediate resistance grounding mode, and operation method thereof | |
| CN101297448B (en) | converter station | |
| CN109245291B (en) | Maintenance safety measure arrangement method for double-bus double-subsection power supply system of transformer substation | |
| RU154342U1 (en) | OPEN DISTRIBUTION DEVICE OF SUBSTATION | |
| CN109995015A (en) | 220KV two electricity two charging DC system | |
| CN102403780A (en) | Power supply device for bypass to operate without power failure | |
| EP4046249A1 (en) | High voltage overhead electric transmission line equipped with switchgear unit | |
| CN110277771B (en) | A method for improving the breaking capacity of short-circuit current in substations by means of line T-connection | |
| CN113437795B (en) | Mobile box transformer substation vehicle with input voltage automatic switching function | |
| CN114256804A (en) | Power short-circuit current DC component standard exceeding transformation method, system, equipment and medium | |
| US20090201702A1 (en) | Converter Station | |
| JP2019122145A (en) | Opening/closing unit group replacement method | |
| CN111509701A (en) | Single bus wiring structure | |
| CN208045949U (en) | A kind of high voltage distribution installation main electrical scheme system | |
| CN207782141U (en) | A kind of secondary voltage circuit and high-tension switch cabinet of PT | |
| CN115372730A (en) | New method for variable low-pressure side pressurization no-load impact test | |
| CN113311229A (en) | Method for testing power phase of GIS cabinet | |
| RU117732U1 (en) | HIGH VOLTAGE DISTRIBUTION DEVICE | |
| CN204258301U (en) | Station service electrical system assisted by nuclear power station | |
| JP2018074643A (en) | Distribution board with power failure compensation device | |
| CN202534944U (en) | Power transformation system with spare-free low-voltage switch connected in parallel with by-pass switch | |
| Belda et al. | AC and DC Switchgear for LCC and VSC HVDC Converter Stations | |
| CN219554656U (en) | Maintenance power distribution optimizing equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |