CN113991616A - Bus protection equipment replacement method based on double-bus wiring mode - Google Patents
Bus protection equipment replacement method based on double-bus wiring mode Download PDFInfo
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- CN113991616A CN113991616A CN202111340747.8A CN202111340747A CN113991616A CN 113991616 A CN113991616 A CN 113991616A CN 202111340747 A CN202111340747 A CN 202111340747A CN 113991616 A CN113991616 A CN 113991616A
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- protection device
- busbar
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/22—Layouts for duplicate bus-bar selection
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A bus protection equipment replacement method based on a double-bus wiring mode is characterized in that according to a relay protection doubling configuration principle, bus protection equipment consists of a protection device I and a protection device II, a new protection device is installed at a different place, the protection devices are replaced one by one when old bus protection equipment is replaced, under the condition that the bus protection equipment is not powered off, power failure of each loop on a bus is combined when the protection device I is replaced, related loops of a corresponding line, namely a current loop, a failure loop, a trip loop and a disconnecting link position loop are respectively transited, and power failure of each loop on the bus is not powered off when the protection device II is replaced, and only the power failure loop is transited; the bus protection equipment can complete the replacement of the bus double protection without power failure.
Description
Technical Field
The invention belongs to the technical field of transformer substation wiring, and relates to a bus protection equipment replacement method based on a double-bus wiring mode.
Background
At present, the protection operation age in a transformer substation is 15 years, according to the operation requirement of a power grid, in order to ensure the reliability of power supply equipment, a protection device needs to be replaced after the operation age is reached, and when the conventional line protection is replaced, only the corresponding line is powered off, so that the operation mode of the whole transformer substation is not greatly influenced, and the load transmission is not lost too much; however, in a double-bus connection mode, the replacement of bus protection equipment is a great challenge for a transformer substation, the bus protection equipment is important system equipment for ensuring the safe and stable operation of a power grid, and the safety, reliability, sensitivity and rapidness of the bus protection equipment are of decisive significance for ensuring the safety of the power grid in the whole area. Therefore, it is necessary to provide a bus protection device with reliable operation and good performance, so as to quickly detect the location of the bus fault and timely and selectively remove the fault. If the high-voltage side bus in the transformer substation adopts the wiring mode of double buses, when the protection of bus needs to be changed, then the circuit that two buses bore all need to have a power failure, so be equivalent to that whole transformer substation all is in the power failure state, this has very big influence to the grid operation: a load loss may be caused by a full stop of the end substation, and the power supply to part of power users is interrupted; the complete stop of the hub transformer substation can cause the system to lose a plurality of important loop connecting lines, and simultaneously, a plurality of low-voltage-level transformer substations taking the hub transformer substation as a superior power supply can be caused to complete stop, thereby causing a large-area power failure accident.
Disclosure of Invention
Object of the Invention
The invention provides a bus protection equipment replacement method based on a double-bus wiring mode, aiming at the problems that when bus protection needs to be replaced, lines carried by two buses need to be powered off, and large-area or all power failure accidents are caused.
Technical scheme
The bus protection equipment and the branch circuit on the bus are provided with a plurality of secondary loops which are respectively: a current loop, a starting failure loop, a trip loop and a disconnecting link position loop;
a current loop: the current collected by the bus protection equipment is taken from each line current transformer on the bus;
starting a failure loop: the starting failure opening amount collected by the bus protection equipment is taken from a breaker failure box in each line protection;
a trip loop: the tripping output by the bus protection equipment acts on a phase splitting operation box in each line protection device;
a disconnecting link position loop: the circuit knife switch position required by the bus protection equipment is provided with a voltage switching box with an input quantity taken from each circuit protection device;
and (3) replacement of a protection device for bus protection: the connection of the above four loops is transited from the old protection state to the new protection state, and the transition process comprises four stages:
1) and (3) an old protection stage:
the old bus protection equipment comprises: an old bus differential protection device I, an old bus differential protection device II and an old bus failure protection device;
the connection between the old bus differential protection device I and each line is provided with a current loop MA1 which is taken from an outdoor terminal box at the downstream of a line current transformer, a tripping loop MT1 acts on a split-phase operation box in each line protection, and a disconnecting link position loop ML1 is taken from a voltage switching box of each line protection;
the connection between the old bus differential protection device II and each line is provided with a current loop MA2 which is taken from an outdoor terminal box at the downstream of a line current transformer, a tripping loop MT2 acts on a split-phase operation box in each line protection, and a disconnecting link position loop ML2 is taken from a voltage switching box of each line protection;
the connection between the old bus failure protection device and each line is provided with a tripping loop ST1 which acts on a phase splitting operation box in each line protection device, a tripping loop ST2 acts on the phase splitting operation box in each line protection device, and a disconnecting link position loop SL is taken from a voltage switching box of each line protection device; the startup failure loop SQ is taken from a breaker failure box in each line protection device;
and when the following transition stage is realized, the insulating medium is adopted to isolate the live line and the live device on the line.
2) A first transition stage:
the bus bar protection device of the first transition stage comprises: a new bus differential and failure protection device I, an old bus differential protection device II and an old bus failure protection device;
the old bus differential protection device I in the old protection stage is shut down, the current loop MA1, the trip loop MT1 and the disconnecting link position loop ML1 are transited to a new bus protection device from the old bus protection device in the old protection stage by combining the power failure of each line one by one, and a starting failure loop SQ1 is added and taken from each line protection device; before the new bus differential and failure protection device I in the stage is not completely transited, the old bus differential protection device II and the old bus failure protection device work;
3) and a second transition stage:
the bus bar protection device of the second transition stage comprises: a new bus differential and failure protection device I and a new bus differential and failure protection device II;
the second transition stage is as follows: the old bus differential protection device II and the old bus failure protection device are stopped, each line is not powered off, a current loop MA2, a trip loop MT2, a trip loop ST1, a trip loop ST2 and a disconnecting link position loop ML2 are transited to a new bus protection device from the old bus protection device in the old protection stage, a starting failure loop SQ and a disconnecting link position loop SL in the old protection stage are removed, and a starting failure loop SQ2 is added and taken from each line protection device; at this stage, the new bus differential and failure protection device I is put into operation; the new bus differential and failure protection device II works by the new bus differential and failure protection device I before complete transition is not completed;
4) and a replacement finishing protection stage:
the bus equipment for replacing and finishing the protection stage comprises the following steps: and the new bus differential and failure protection device I and the new bus differential and failure protection device II are put into operation, and the replacement in the protection stage is completed.
Advantages and effects
The working process is simplified, the method is simple and easy to implement, the working time is saved, and the working efficiency is improved; the bus is not required to be stopped completely, and the power supply reliability is ensured; the personal and equipment safety is guaranteed, and the maximum requirement of system operation is met.
Drawings
FIG. 1 is a schematic diagram of the old protection phase of the present invention; (a) the circuit wiring diagram of the old bus differential protection device I is shown, (b) the circuit wiring diagram of the old bus differential protection device II is shown, (c) the circuit wiring diagram of the old bus failure protection device is shown;
FIG. 2 is a schematic diagram of a first transition phase of the present invention; (a) the circuit wiring diagram of the new bus differential and failure protection device I is shown, (b) the circuit wiring diagram of the old bus differential protection device II is shown, (c) the circuit wiring diagram of the old bus failure protection device is shown;
FIG. 3 is a schematic diagram of a second transition phase of the present invention; (a) the circuit wiring diagram of the new bus differential and failure protection device I is shown, (b) the circuit wiring diagram of the new bus differential and failure protection device II is shown, (c) the circuit wiring diagram of the removed old bus differential protection device II is shown, (d) the circuit wiring diagram of the removed old bus failure protection device is shown;
FIG. 4 is a schematic diagram of a replacement complete protection phase; (a) the circuit connection diagram of the new bus differential and failure protection device I is shown, and (b) the circuit connection diagram of the new bus differential and failure protection device II is shown.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
according to a relay protection duplicate configuration principle, bus protection equipment consists of a protection device I and a protection device II, a new protection device is installed at a different place, the protection devices are replaced one by one when old bus protection equipment is replaced, under the condition that the bus protection equipment is not powered off, the protection device I is replaced by combining the power failure of each loop on a bus, related loops of a corresponding line, namely a current loop, a failure loop, a trip loop and a disconnecting link position loop are respectively transited, and each loop on the bus is not powered off when the protection device II is replaced and only a power transition failure loop is provided; the bus protection equipment completes the replacement work of the bus double protection without power failure;
the new protection device is installed at a different place, the protection device is replaced one by one when the bus protection equipment is replaced, the bus is not powered off, and power is cut off in combination with each loop on the bus when the protection device I is replaced, so that the protection device I corresponds to the relevant loop of the line: after the current loop, the failure loop, the trip loop and the disconnecting link position loop are respectively subjected to transition access, an isolation measure is taken, and the old failure protection device is not removed during the period; when the protection device II is replaced, all loops on the bus are not powered off, and only the loops with power failure are powered on for transition.
Examples
The bus protection equipment and the branch circuit on the bus are provided with a plurality of secondary loops which are respectively: a current loop, a starting failure loop, a trip loop and a disconnecting link position loop;
a current loop: the current collected by the bus protection equipment is taken from each line current transformer on the bus;
starting a failure loop: the starting failure opening amount collected by the bus protection equipment is taken from a breaker failure box in each line protection;
a trip loop: the tripping output by the bus protection equipment acts on a phase splitting operation box in each line protection device;
a disconnecting link position loop: the circuit knife switch position required by the bus protection equipment is provided with a voltage switching box with an input quantity taken from each circuit protection device;
and (3) replacement of a protection device for bus protection: the connection of the above four loops is transited from the old protection state to the new protection state, and the transition process comprises four stages:
1) and (3) an old protection stage:
as shown in fig. 1:
the old bus protection equipment comprises: an old bus differential protection device I, an old bus differential protection device II and an old bus failure protection device;
the connection between the old bus differential protection device I and each line is provided with a current loop MA1 which is taken from an outdoor terminal box at the downstream of a line current transformer, a tripping loop MT1 acts on a split-phase operation box in each line protection, and a disconnecting link position loop ML1 is taken from a voltage switching box of each line protection;
the connection between the old bus differential protection device II and each line is provided with a current loop MA2 which is taken from an outdoor terminal box at the downstream of a line current transformer, a tripping loop MT2 acts on a split-phase operation box in each line protection, and a disconnecting link position loop ML2 is taken from a voltage switching box of each line protection;
the connection between the old bus failure protection device and each line is provided with a tripping loop ST1 which acts on a phase splitting operation box in each line protection device, a tripping loop ST2 acts on the phase splitting operation box in each line protection device, and a disconnecting link position loop SL is taken from a voltage switching box of each line protection device; the startup failure loop SQ is taken from a breaker failure box in each line protection device;
2) a first transition stage:
as shown in fig. 2:
the bus bar protection device of the first transition stage comprises: a new bus differential and failure protection device I, an old bus differential protection device II and an old bus failure protection device;
the old bus differential protection device I in the old protection stage is shut down, the current loop MA1, the trip loop MT1 and the disconnecting link position loop ML1 are transited to a new bus protection device from the old bus protection device in the old protection stage by combining the power failure of each line one by one, and a starting failure loop SQ1 is added and taken from each line protection device; before the new bus differential and failure protection device I in the stage is not completely transited, the old bus differential protection device II and the old bus failure protection device work;
3) and a second transition stage:
as shown in fig. 3:
the bus bar protection device of the second transition stage comprises: a new bus differential and failure protection device I and a new bus differential and failure protection device II;
the second transition stage is as follows: the old bus differential protection device II and the old bus failure protection device are stopped, each line is not powered off, a current loop MA2, a trip loop MT2, a trip loop ST1, a trip loop ST2 and a disconnecting link position loop ML2 are transited to a new bus protection device from the old bus protection device in the old protection stage, a starting failure loop SQ and a disconnecting link position loop SL in the old protection stage are removed, and a starting failure loop SQ2 is added and taken from each line protection device; at this stage, the new bus differential and failure protection device I is put into operation; the new bus differential and failure protection device II works by the new bus differential and failure protection device I before complete transition is not completed;
4) and a replacement finishing protection stage:
as shown in fig. 4:
the bus equipment for replacing and finishing the protection stage comprises the following steps: and the new bus differential and failure protection device I and the new bus differential and failure protection device II are put into operation, and the replacement in the protection stage is completed.
And when the transition stage is realized, the insulating medium is adopted to isolate the live line and the live device on the line.
The safe operation of the invention:
1. after the new bus protection device is connected into a first branch circuit, all outlets and functional pressing plates on the protection device are removed, a terminal block tripping circuit connecting piece is disconnected, an insulating partition plate is inserted, and the connected branch circuit is sealed by red insulating adhesive tape to prevent collision;
2. before the second branch line starts to work, the isolation measures of the connected branch line on the protection device are ensured to be perfect.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111340747.8A CN113991616B (en) | 2021-11-12 | 2021-11-12 | Bus protection equipment replacement method based on double bus wiring mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111340747.8A CN113991616B (en) | 2021-11-12 | 2021-11-12 | Bus protection equipment replacement method based on double bus wiring mode |
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| Publication Number | Publication Date |
|---|---|
| CN113991616A true CN113991616A (en) | 2022-01-28 |
| CN113991616B CN113991616B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111340747.8A Active CN113991616B (en) | 2021-11-12 | 2021-11-12 | Bus protection equipment replacement method based on double bus wiring mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114520499A (en) * | 2022-03-07 | 2022-05-20 | 包头钢铁（集团）有限责任公司 | Method for online replacement of fault element and transmission inspection protection of bus differential protection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6710988B1 (en) * | 1999-08-17 | 2004-03-23 | General Electric Company | Small-sized industrial rated electric motor starter switch unit |
| EP2194628A1 (en) * | 2008-12-02 | 2010-06-09 | Ormazabal Protection & Automation, S.L. | Fault protection system for a network area of a high voltage distribution network |
| CN103346496A (en) * | 2013-07-03 | 2013-10-09 | 中国电力工程顾问集团东北电力设计院 | Double-bus protection uninterrupted power transition method in transformer substation intellectualized reconstruction process |
| CN112510653A (en) * | 2020-09-20 | 2021-03-16 | 广东韶钢松山股份有限公司 | Bus differential protection device and online replacement and debugging method |
| CN113507072A (en) * | 2021-07-04 | 2021-10-15 | 国网辽宁省电力有限公司锦州供电公司 | A method of live replacement of 10kV relay protection device |
-
2021
- 2021-11-12 CN CN202111340747.8A patent/CN113991616B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6710988B1 (en) * | 1999-08-17 | 2004-03-23 | General Electric Company | Small-sized industrial rated electric motor starter switch unit |
| EP2194628A1 (en) * | 2008-12-02 | 2010-06-09 | Ormazabal Protection & Automation, S.L. | Fault protection system for a network area of a high voltage distribution network |
| CN103346496A (en) * | 2013-07-03 | 2013-10-09 | 中国电力工程顾问集团东北电力设计院 | Double-bus protection uninterrupted power transition method in transformer substation intellectualized reconstruction process |
| CN112510653A (en) * | 2020-09-20 | 2021-03-16 | 广东韶钢松山股份有限公司 | Bus differential protection device and online replacement and debugging method |
| CN113507072A (en) * | 2021-07-04 | 2021-10-15 | 国网辽宁省电力有限公司锦州供电公司 | A method of live replacement of 10kV relay protection device |
Non-Patent Citations (1)
| Title |
|---|
| 左可飞;崔明德;李中华;赵念;: "220kV母线保护改造技术原则探讨" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114520499A (en) * | 2022-03-07 | 2022-05-20 | 包头钢铁（集团）有限责任公司 | Method for online replacement of fault element and transmission inspection protection of bus differential protection device |
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| CN113991616B (en) | 2023-05-30 |
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