CN113991616B - 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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- CN113991616B CN113991616B CN202111340747.8A CN202111340747A CN113991616B CN 113991616 B CN113991616 B CN 113991616B CN 202111340747 A CN202111340747 A CN 202111340747A CN 113991616 B CN113991616 B CN 113991616B
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- bus
- protection device
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- failure
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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
Abstract
According to a relay protection doubling configuration principle, the bus protection equipment consists of a protection device I and a protection device II, the new protection device is installed in different places, the protection devices are replaced one by one when the old bus protection equipment is replaced, under the condition that the bus protection equipment is not powered off, the power failure of each loop on a bus is combined when the protection device I is replaced, the transition is carried out on the relevant loops of the corresponding lines, namely a current loop, a failure loop, a tripping loop and a disconnecting link position loop, and when the protection device II is replaced, the power failure loop is only electrified; the bus double-sleeve protection replacement work is completed under the form that the bus protection equipment does not need power failure.
Description
Technical Field
The invention belongs to the technical field of wiring of substations, and relates to a bus protection equipment replacement method based on a double-bus wiring mode.
Background
The protection operation period in the existing transformer substation is 15 years, the protection device is required to be replaced after the operation period is reached according to the operation requirement of the power grid, the power failure of the corresponding line is only required when the conventional line is replaced, the whole operation mode of the transformer substation is not greatly influenced, and the load transportation is not too lost; however, in the double-bus wiring 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 rapidity of the bus protection equipment have 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 bus fault and selectively remove the fault in time. If a wiring mode of double buses is adopted for a high-voltage side bus in a transformer substation, when the protection of the buses needs to be replaced, the circuits borne by the two buses all need to be powered off, so that the whole transformer substation is in a power failure state, and the operation of a power grid is greatly influenced: the complete stop of the terminal transformer substation can cause load loss, and power supply to partial power consumers 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, the complete stop of a plurality of low-voltage-class transformer substations taking the system as an upper-level power supply can be caused, so that a large-area power failure accident is caused.
Disclosure of Invention
Object of the Invention
The invention provides a bus protection equipment replacing method based on a double bus wiring mode, aiming at the problem that when a bus protection needs to be replaced, lines borne by two buses need to be powered off to cause large-area or all power failure accidents.
Technical proposal
The bus protection equipment and branch lines on the bus are provided with a plurality of secondary circuits, which are respectively: a current loop, a start failure loop, a trip loop, and a knife switch position loop;
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;
trip circuit: the tripping opening quantity output by the bus protection equipment acts on the split-phase operation boxes in the line protection devices;
knife switch position loop: the position opening amount of the line disconnecting link required by the bus protection equipment is taken from the voltage switching box of each line protection device;
and replacing a protection device for protecting the bus: the connection of the four loops is transited from the old protection state to the new protection state, and the transition process comprises four stages:
1) Old protection phase:
the old bus bar protection apparatus includes: an old bus differential protection device I, an old bus differential protection device II and an old bus failure protection device;
the old bus differential protection device I and each line are connected with an outdoor terminal box, a current loop MA1 is taken from 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 old bus differential protection device II and each line are connected with an outdoor terminal box, a current loop MA2 is taken from 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 old bus failure protection device and each line are connected with a tripping circuit ST1 acting on a split-phase operation box in each line protection device, a tripping circuit ST2 acting on a split-phase operation box in each line protection device, and a disconnecting link position circuit SL being taken from a voltage switching box of each line protection device; the start failure circuit SQ is taken from the breaker failure box in each line protection device;
when the following transition stage is realized, an insulating medium is adopted to isolate the electrified line and the electrified device on the line.
2) A first transition stage:
the bus bar protection device of the first transition phase comprises: new bus differential and failure protection device I, old bus differential protection device II and old bus failure protection device;
the old bus differential protection device I in the old protection stage is stopped, the current loop MA1, the tripping loop MT1 and the disconnecting link position loop ML1 are transited from the old bus protection device in the old protection stage to the new bus protection device by combining the power failure of each line one by one, and the starting failure loop SQ1 is added and taken from each line protection device; the new bus differential and failure protection device I at this stage works by the old bus differential and failure protection device II before the complete transition is completed;
3) A second transition stage:
the bus bar protection device of the second transition phase 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 tripping loop MT2, a tripping loop ST1, a tripping loop ST2 and a disconnecting link position loop ML2 are transited into 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; the new bus differential and failure protection device I is put into operation at this stage; 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 (3) a replacement completion protection stage:
the bus equipment for replacing the complete protection stage is as follows: 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 protection stage is replaced.
Advantages and effects
The working process is simplified, the method is simple and feasible, the working time is saved, and the working efficiency is improved; the bus is not required to be completely stopped, so that the power supply reliability is ensured; the personal safety and the equipment safety are ensured, and the maximum operation requirement of the system is met.
Drawings
FIG. 1 is a schematic diagram of the old protection phase of the present invention; (a) is a circuit wiring schematic diagram of an old bus differential protection device I, (b) is a circuit wiring schematic diagram of an old bus differential protection device II, and (c) is a circuit wiring schematic diagram of an old bus failure protection device;
FIG. 2 is a schematic diagram of a first transition stage according to the present invention; (a) is a circuit wiring schematic diagram of a new bus differential and failure protection device I, (b) is a circuit wiring schematic diagram of an old bus differential protection device II, and (c) is a circuit wiring schematic diagram of an old bus failure protection device;
FIG. 3 is a schematic diagram of a second transition stage according to the present invention; (a) is a circuit wiring schematic diagram of a new bus differential and failure protection device I, (b) is a circuit wiring schematic diagram of a new bus differential and failure protection device II, (c) is a circuit wiring schematic diagram of a removed old bus differential protection device II, and (d) is a circuit wiring schematic diagram of a removed old bus failure protection device;
FIG. 4 is a schematic diagram of the replacement complete protection phase; (a) A circuit wiring schematic diagram of the new bus differential and failure protection device I, and (b) a circuit wiring schematic diagram of the new bus differential and failure protection device II.
Detailed Description
The invention is further described with reference to the accompanying drawings:
according to the principle of relay protection double configuration, the bus protection equipment consists of a protection device I and a protection device II, the new protection device is installed in different places, the protection devices are replaced one by one when the old bus protection equipment is replaced, under the condition that the bus protection equipment is not powered off, the power failure of each loop on the bus is combined when the protection device I is replaced, the corresponding loops of the corresponding lines, namely the current loop, the failure loop, the tripping loop and the disconnecting link position loop are respectively transited, and when the protection device II is replaced, the power failure of each loop on the bus is not interrupted, and only the failure loop is transited in a live state; the bus double-sleeve protection replacement work is completed under the form that the bus protection equipment does not need power failure;
the new protection device is installed in different places, the protection device is replaced one by one when the bus protection equipment is replaced, the bus is not powered off, power failure of each loop on the bus is combined when the protection device I is replaced, and the related loops of the corresponding lines are powered off: the current loop, the failure loop, the tripping loop and the disconnecting link position loop are respectively connected in a transitional way and then are subjected to isolation measures, and the old failure protection device is not returned to operation in the period; when the protection device II is replaced, all circuits on the bus are not powered off, and only the transition failure circuit is electrified.
Examples
The bus protection equipment and branch lines on the bus are provided with a plurality of secondary circuits, which are respectively: a current loop, a start failure loop, a trip loop, and a knife switch position loop;
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;
trip circuit: the tripping opening quantity output by the bus protection equipment acts on the split-phase operation boxes in the line protection devices;
knife switch position loop: the position opening amount of the line disconnecting link required by the bus protection equipment is taken from the voltage switching box of each line protection device;
and replacing a protection device for protecting the bus: the connection of the four loops is transited from the old protection state to the new protection state, and the transition process comprises four stages:
1) Old protection phase:
as shown in fig. 1:
the old bus bar protection apparatus includes: an old bus differential protection device I, an old bus differential protection device II and an old bus failure protection device;
the old bus differential protection device I and each line are connected with an outdoor terminal box, a current loop MA1 is taken from 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 old bus differential protection device II and each line are connected with an outdoor terminal box, a current loop MA2 is taken from 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 old bus failure protection device and each line are connected with a tripping circuit ST1 acting on a split-phase operation box in each line protection device, a tripping circuit ST2 acting on a split-phase operation box in each line protection device, and a disconnecting link position circuit SL being taken from a voltage switching box of each line protection device; the start failure circuit SQ is taken from the 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 phase comprises: new bus differential and failure protection device I, old bus differential protection device II and old bus failure protection device;
the old bus differential protection device I in the old protection stage is stopped, the current loop MA1, the tripping loop MT1 and the disconnecting link position loop ML1 are transited from the old bus protection device in the old protection stage to the new bus protection device by combining the power failure of each line one by one, and the starting failure loop SQ1 is added and taken from each line protection device; the new bus differential and failure protection device I at this stage works by the old bus differential and failure protection device II before the complete transition is completed;
3) A second transition stage:
as shown in fig. 3:
the bus bar protection device of the second transition phase 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 tripping loop MT2, a tripping loop ST1, a tripping loop ST2 and a disconnecting link position loop ML2 are transited into 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; the new bus differential and failure protection device I is put into operation at this stage; 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 (3) a replacement completion protection stage:
as shown in fig. 4:
the bus equipment for replacing the complete protection stage is as follows: 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 protection stage is replaced.
When the transition stage is realized, an insulating medium is adopted to isolate the electrified circuit and the electrified device on the circuit.
The safety operation of the invention:
1. after the new bus protection device is connected to the first branch line, all outlets and functional pressing plates on the protection device are removed, a tripping circuit connecting piece of the terminal block is disconnected, an insulating partition plate is inserted, and the connected branch line is sealed by a red insulating adhesive tape to prevent no collision;
2. before the second branch line starts working, the isolation measure of the accessed branch line on the protection device is ensured to be perfect.
Claims (4)
1. A bus protection equipment replacement method based on a double bus wiring mode is characterized in that: the bus protection is replaced by the following four stages:
1) Old protection phase:
the old bus bar protection apparatus includes: an old bus differential protection device I, an old bus differential protection device II and an old bus failure protection device;
the old bus differential protection device I and each line are connected with an outdoor terminal box, a current loop MA1 is taken from 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 old bus differential protection device II and each line are connected with an outdoor terminal box, a current loop MA2 is taken from 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 old bus failure protection device and each line are connected with a tripping circuit ST1 acting on a split-phase operation box in each line protection device, a tripping circuit ST2 acting on a split-phase operation box in each line protection device, and a disconnecting link position circuit SL being taken from a voltage switching box of each line protection device; the start failure circuit SQ is taken from the breaker failure box in each line protection device;
2) A first transition stage:
the bus bar protection device of the first transition phase comprises: new bus differential and failure protection device I, old bus differential protection device II and old bus failure protection device;
the old bus differential protection device I in the old protection stage is stopped, the current loop MA1, the tripping loop MT1 and the disconnecting link position loop ML1 are transited from the old bus protection device in the old protection stage to the new bus protection device by combining the power failure of each line one by one, and the starting failure loop SQ1 is added and taken from each line protection device; the new bus differential and failure protection device I at this stage works by the old bus differential and failure protection device II before the complete transition is completed;
3) A second transition stage:
the bus bar protection device of the second transition phase 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 tripping loop MT2, a tripping loop ST1, a tripping loop ST2 and a disconnecting link position loop ML2 are transited into 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; the new bus differential and failure protection device I is put into operation at this stage; 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 (3) a replacement completion protection stage:
the bus equipment for replacing the complete protection stage is as follows: 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 protection stage is replaced.
2. The bus bar protection device replacement method based on the double bus bar wiring mode according to claim 1, wherein: when the transition stage is realized, an insulating medium is adopted to isolate the electrified circuit and the electrified device on the circuit.
3. The bus bar protection device replacement method based on the double bus bar wiring mode according to claim 1, wherein: the protection device replacement for bus protection includes a current loop, a start failure loop, a trip loop, and a connection of the knife switch position loop transitioning from an old protection state to a new protection state.
4. The bus bar protection device replacement method based on the double bus bar wiring mode according to claim 1, wherein: the bus protection equipment and branch lines on the bus are provided with a plurality of secondary circuits, which are respectively: a current loop, a start failure loop, a trip loop, and a knife switch position loop;
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;
trip circuit: the tripping opening quantity output by the bus protection equipment acts on the split-phase operation boxes in the line protection devices;
knife switch position loop: the position opening amount of the line disconnecting link required by the bus protection equipment is taken from the voltage switching box of each line protection device.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN113991616A CN113991616A (en) | 2022-01-28 |
| CN113991616B true 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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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 | Method for replacing 10kV relay protection device in live mode |
-
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 | Method for replacing 10kV relay protection device in live mode |
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.四川电力技术.2010,(第04期),全文. * |
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