CN113346409A - Uninterrupted power operation method for load transfer maintenance of 10kV outgoing line interval of transformer substation - Google Patents
Uninterrupted power operation method for load transfer maintenance of 10kV outgoing line interval of transformer substation Download PDFInfo
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- CN113346409A CN113346409A CN202110792232.5A CN202110792232A CN113346409A CN 113346409 A CN113346409 A CN 113346409A CN 202110792232 A CN202110792232 A CN 202110792232A CN 113346409 A CN113346409 A CN 113346409A
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- line
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- power
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- 238000012423 maintenance Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012546 transfer Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 238000011835 investigation Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 12
- 238000004134 energy conservation Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention belongs to the technical field of electric power overhaul, and particularly relates to a non-power-outage operation method for load transfer overhaul at 10kV outgoing line intervals of a transformer substation, which comprises the following steps: s1, surveying and detecting equipment to be overhauled and a line where the equipment is located, and selecting a bypass line access point; s2, detecting and evaluating the adjacent line; s3, connecting a cable of the bypass line to a line connected with the equipment to be overhauled from an adjacent line, and closing a bypass line switch; s4, disconnecting a high-voltage disconnecting link of a circuit connected with the maintenance equipment, and stopping power at intervals when the bus is outgoing by the maintenance personnel of the transformer substation to start power-off maintenance work; and S5, finishing the equipment maintenance work, closing the high-voltage disconnecting link of the line connecting circuit at the line outlet interval, and disconnecting and removing the bypass line connection to recover each connecting circuit after confirming that the maintenance equipment and the line thereof operate normally. The method utilizes the bypass to realize the transfer of the interval load under the condition that the line side implements the whole line user without power failure.
Description
Technical Field
The invention belongs to the technical field of electric power overhaul, and particularly relates to a non-power-off operation method for load transfer overhaul at 10kV outgoing line intervals of a transformer substation.
Background
When the 10kV outgoing line interval traditional power failure maintenance of the transformer substation is carried out, the line carried by the equipment is stopped, the outgoing line interval is powered off, the whole line is stopped, individual 10kV users are stopped, the load loss of the line cannot be estimated, the power supply reliability is reduced, the assessment index is influenced, the power failure influences the life of the users, the economy suffers from loss, resources are wasted, and the social situation of energy conservation, efficiency improvement, energy conservation and emission reduction at present is not met.
The invention patent of publication number CN112132300A discloses a transformer substation maintenance method, device and system, which comprises the steps of constructing a maintenance work flow according to a maintenance task, and sending a maintenance subtask to an operation terminal according to a work node of the maintenance work flow; receiving a maintenance result, sending an approval request and receiving an approval result; judging whether the approval result passes, if so, entering the next working node, and otherwise, sending a refund instruction to the current working node to receive the updated overhaul result; and traversing the maintenance work flow until the approval results of all the work nodes approved are received, storing the corresponding maintenance results into a maintenance work database, and calling and displaying the maintenance results of the related maintenance tasks in the maintenance work database by constructing indexes. Covering the transformer substation maintenance overall process with digital means, overhauing and approving every work node in proper order, controlling each link of maintenance work, mastering every maintainer's operating condition, solving the supervision problem in the current transformer substation maintenance work, the research that the maintenance process that this patent was directed to goes on does not consider the influence that the maintenance process has a power failure and causes.
The invention patent of publication number CN103427367B discloses a power transmission line maintenance method, which comprises the following steps: carrying out state detection on each line unit in the power transmission line, and recording a detection result; calculating a risk value of the power transmission line according to the recorded detection result; multiplying the risk value by a weight coefficient corresponding to the power transmission line, and calculating a comprehensive risk value of the power transmission line; and executing a corresponding maintenance plan for the power transmission line according to the calculated comprehensive risk value. The invention can preset corresponding weight coefficients according to the characteristics and the actual conditions of the power transmission line, multiplies the risk value of the power transmission line by the corresponding weight coefficient of the power transmission line, calculates the comprehensive risk value of the power transmission line, and then executes a corresponding maintenance plan for the power transmission line according to the calculated comprehensive risk value. The invention considers the defects in the maintenance work of the transmission line, carries out research and design aiming at the defects, and does not consider the influence of the maintenance power failure on the maintenance work.
Disclosure of Invention
The invention aims to provide a non-power-off operation method for load transfer and overhaul of a 10kV outgoing line interval of a transformer substation, aiming at solving the problems in the prior art.
The technical scheme of the invention is as follows:
the uninterrupted power operation method for load transfer maintenance of 10kV outgoing line intervals of the transformer substation comprises the following steps:
s1, firstly, carrying out early-stage investigation and detection on equipment to be overhauled and a line where the equipment is located, selecting a bypass line access point, and approaching a normally-running line suitable for supplying power to the line to be overhauled;
s2, detecting and evaluating the adjacent line, detecting whether the adjacent line operates normally or not, wherein the load and current allowed to be borne by the adjacent line meet the requirements, and performing the next step of work when the adjacent line operates normally;
s3, connecting a cable of the bypass system into a line connected with the equipment to be overhauled from an adjacent line, detecting that the connection line where the equipment to be overhauled is located and a bypass line switch are normal in operation, and switching on the bypass line switch to carry out the next step of work;
s4, disconnecting a high-voltage disconnecting link of a circuit connected with the maintenance equipment, and interrupting power supply to the outgoing line of the bus by the maintenance personnel of the transformer substation to start maintenance;
and S5, after the equipment maintenance work is finished, confirming that the operation requirements are met, closing the high-voltage disconnecting link of the adjacent connected line, disconnecting and removing the bypass line connection after the maintenance equipment and the connected line operate normally, and recovering the normal operation of each connecting line.
Specifically, in step S1, the line current detection of the device to be overhauled does not exceed the carrying capacity of the bypass line, and the current range that can be carried does not exceed 200A.
Specifically, the load and current allowed to be carried by the adjacent line in step S2 do not exceed 200A.
Specifically, the current carried by the bypass line is less than 200A.
In the past, the line carried by the equipment is stopped, the load loss of the line is immeasurable, the power supply reliability is reduced, the assessment index is influenced, the power failure affects the life of a user, and the economy suffers from loss. The resources are wasted, and the social situation of energy conservation, efficiency improvement, energy conservation and emission reduction is not met. At present, no one carries out research and countermeasure on the influence caused by power failure, and only the problem and deficiency in the maintenance process are researched and solved, so that the method for maintenance without power failure is omitted.
The principle of the invention is that a 10kV line carried by a bus outgoing interval of a transformer substation is temporarily connected with a bypass of an adjacent distribution line, and after the normal operation, the outgoing interval is disconnected, the line keeps a normal operation state, and the outgoing interval of the transformer substation can be overhauled by power failure.
The invention has the beneficial effects that: the method provided by the invention can keep the line to run in a live way, the maintenance equipment can realize the maintenance without power failure for users, the safety and the reliability are realized, the load loss is less, the power supply reliability is guaranteed, the power failure of the users of the whole line is realized on the side of the line, the comprehensive maintenance range of the transformer substation equipment can be realized, the power supply reliability is greatly improved, and the maintenance mode without power failure at the 10kV outgoing line interval of the transformer substation is more flexible and convenient, and the method develops towards the direction of diversified maintenance.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the specific embodiments.
The invention provides a non-power-off operation method for load transfer maintenance of a 10kV outgoing line interval of a transformer substation, which comprises the following steps of:
s1, firstly, carrying out early investigation and detection on equipment to be overhauled and a line where the equipment is located, selecting a bypass system access point, and approaching a normally-running line suitable for supplying power to the line to be overhauled, wherein the current detection of the line where the equipment to be overhauled is located does not exceed the bearing capacity of the connected bypass line, and the range of the current capable of being borne does not exceed 200A;
s2, detecting and evaluating the adjacent line, detecting whether the adjacent line operates normally or not, wherein the load and current allowed to be borne by the adjacent line meet the requirements, and when the adjacent line operates normally, performing the next step of work, wherein the load and current allowed to be borne by the adjacent line do not exceed 200A;
s3, connecting a cable of the bypass system to a line connected with equipment to be overhauled from an adjacent line, wherein the current carried by the bypass line is less than 200A, the connection line where the equipment to be overhauled is located and a bypass line switch detect normal operation, and the next step of work can be carried out by switching on the bypass line switch;
s4, disconnecting a high-voltage disconnecting link of a circuit connected with the maintenance equipment, and interrupting power supply to the outgoing line of the bus by the maintenance personnel of the transformer substation to start maintenance;
and S5, after the equipment maintenance work is finished, confirming that the operation requirements are met, closing the high-voltage disconnecting link of the adjacent connected line, disconnecting and removing the bypass line connection after the maintenance equipment and the connected line operate normally, and recovering the normal operation of each connecting line.
In the practical operation process, the temporary power supply line has few users, the corresponding load is certainly not large, the current is about 20A-30A, the load of the line to be supplied is not large, the line current is about 30A, the line current and the line current are connected in series to form a total current of 50A-60A, and the load carrying capacity of a bypass system is within 200A.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (4)
1. The uninterrupted power operation method for load transfer maintenance of 10kV outgoing line intervals of the transformer substation is characterized by comprising the following steps of:
s1, firstly, carrying out early-stage investigation and detection on equipment to be overhauled and a line where the equipment is located, selecting a bypass line access point, and enabling the access point to be close to a line which runs normally and is suitable for supplying power to a line to be switched;
s2, detecting and evaluating the adjacent line, detecting whether the adjacent line operates normally or not, wherein the load and current allowed to be borne by the adjacent line meet the requirements of a series line, and performing the next step of work when the adjacent line operates normally;
s3, connecting a cable of the bypass line to a line connected with the equipment to be overhauled from an adjacent line, detecting that the line connected with the equipment to be overhauled and the bypass line switch operate normally, and switching on the bypass line switch to carry out the next step of work;
s4, disconnecting a high-voltage disconnecting link of a circuit connected with the maintenance equipment, and interrupting power supply to the outgoing line of the bus by the maintenance personnel of the transformer substation to start maintenance;
and S5, after the equipment maintenance work is finished, confirming that the operation requirements are met, closing the high-voltage disconnecting link of the connected line, disconnecting and removing the bypass line connection after the maintenance equipment and the connected line operate normally, and recovering the normal operation state of each line.
2. The substation 10kV outgoing line interval load transfer maintenance non-power-off operation method according to claim 1, wherein the line current detection of the equipment to be maintained in step S1 does not exceed the carrying capacity of the connected bypass line, and the current value that can be carried does not exceed 200A.
3. The substation 10kV outgoing line interval load transfer maintenance non-power-off operation method according to claim 1, wherein the allowable load and current of the adjacent line in the step S2 are not more than 200A.
4. The substation 10kV outgoing line interval on-load transfer overhaul uninterrupted operation method according to claim 1, characterized in that the current carried by the bypass line is less than 200A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792232.5A CN113346409A (en) | 2021-07-14 | 2021-07-14 | Uninterrupted power operation method for load transfer maintenance of 10kV outgoing line interval of transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792232.5A CN113346409A (en) | 2021-07-14 | 2021-07-14 | Uninterrupted power operation method for load transfer maintenance of 10kV outgoing line interval of transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN113346409A true CN113346409A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110792232.5A Pending CN113346409A (en) | 2021-07-14 | 2021-07-14 | Uninterrupted power operation method for load transfer maintenance of 10kV outgoing line interval of transformer substation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812041A (en) * | 2014-02-21 | 2014-05-21 | 国网湖南省电力公司带电作业中心 | Method for overhauling ring main unit of 10kV cable circuit without switching power supply off |
| CN105406384A (en) * | 2015-12-25 | 2016-03-16 | 广东电网有限责任公司佛山供电局 | Uninterruptible overhaul system for substation equipment and method thereof |
| CN109787132A (en) * | 2018-12-29 | 2019-05-21 | 国网山东省电力公司临清市供电公司 | A kind of intelligence 10kV septal accessory pathways vehicle and temporary transmission system |
| CN113054656A (en) * | 2021-03-10 | 2021-06-29 | 广东电网有限责任公司广州供电局 | Distribution transformer overhauling method and device, electronic equipment and storage medium |
-
2021
- 2021-07-14 CN CN202110792232.5A patent/CN113346409A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812041A (en) * | 2014-02-21 | 2014-05-21 | 国网湖南省电力公司带电作业中心 | Method for overhauling ring main unit of 10kV cable circuit without switching power supply off |
| CN105406384A (en) * | 2015-12-25 | 2016-03-16 | 广东电网有限责任公司佛山供电局 | Uninterruptible overhaul system for substation equipment and method thereof |
| CN109787132A (en) * | 2018-12-29 | 2019-05-21 | 国网山东省电力公司临清市供电公司 | A kind of intelligence 10kV septal accessory pathways vehicle and temporary transmission system |
| CN113054656A (en) * | 2021-03-10 | 2021-06-29 | 广东电网有限责任公司广州供电局 | Distribution transformer overhauling method and device, electronic equipment and storage medium |
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Application publication date: 20210903 |
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