CN112182816B - Method for preventing misoperation in online mode in accident voltage loss region of 35 kV-110 kV power grid - Google Patents
Method for preventing misoperation in online mode in accident voltage loss region of 35 kV-110 kV power grid Download PDFInfo
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- CN112182816B CN112182816B CN202011000636.8A CN202011000636A CN112182816B CN 112182816 B CN112182816 B CN 112182816B CN 202011000636 A CN202011000636 A CN 202011000636A CN 112182816 B CN112182816 B CN 112182816B
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Abstract
The invention relates to a method for preventing misoperation in an accident voltage loss area of a 35 kV-110 kV power grid on line, which comprises the following steps: intercepting the topological relation among devices after a switching accident occurs and generating a network tidal current diagram through a topological system built in the power grid; according to the network tide flow diagram, the transformer substations with switch accidents are taken as starting points, the switches with the accidents are taken as boundary points for inspecting the transformer substations with possible voltage loss, the transformer substations with the tide connection are judged one by one, and when the busbar voltage of one transformer substation is suddenly reduced by 90% or the busbar voltage is less than 1kV in inspection, the transformer substations with the voltage loss are judged; self-checking all the voltage-loss transformer substations, and confirming whether each voltage-loss transformer substation has an abnormal condition; when the transformer substation with voltage loss has an abnormal condition, the remote control function of the transformer substation is automatically locked, and an operation command containing abnormal condition information for confirming whether to continue locking or unlocking is sent to the remote control end.
Description
Technical Field
The invention relates to a method for preventing misoperation in an accident voltage loss area of a 35 kV-110 kV power grid on line, belonging to the field of power system dispatching.
Background
With the development of power grids, the structure of the power grid is more complex, the monitoring information quantity of the power grid is more and more due to the increase of substation equipment, and the monitoring workload of the power grid is increased day by day. At present, county-level power grid monitors monitor signals of about 50 35 kV-110 kV transformer substations and hundreds of thousands of transformer substations in real time. When a switch in bad weather or a large area is tripped, one or more transformer substations are easy to lose voltage, and monitoring personnel need to simultaneously process and analyze hundreds of abnormal signals sent at intervals, such as accident tripping, equipment abnormity, a direct current system, public measurement and control and the like. The analysis by manual processing requires a long time, and omission easily occurs, resulting in missed monitoring and misoperation. Not only influences the time of recovering power transmission, but also may cause more serious consequences such as enlarging the accident range.
Meanwhile, the electric power plays a higher role in the life of people, and the requirements on power supply reliability and power restoration time are higher and higher. The voltage loss of one 35kV transformer substation means that one town or hundreds of residents have power failure, the voltage loss of one 110kV transformer substation can cause the simultaneous voltage loss of a plurality of 35kV transformer substations, and the loss caused by one-minute power failure is more than ten thousands of yuan.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for preventing misoperation in an accident voltage loss area of a 35 kV-110 kV power grid on line, when accident tripping occurs, the voltage loss range of a transformer substation is automatically identified, abnormal signals in the transformer substation are searched and analyzed, safety search operation with constraint conditions is carried out according to the severity of action signals, and an automatic valve type locking function is realized. Therefore, the workload of a monitor is reduced, a dispatcher is helped to determine a re-routing path, the safety of power transmission recovery is improved, and the power transmission time is shortened.
The technical scheme of the invention is as follows:
a method for preventing misoperation in an accident voltage loss region of a 35 kV-110 kV power grid on line comprises the following steps:
generating a network tide flow graph, acquiring a topological relation among equipment nodes through a topological system built in a power grid, intercepting the topological relation among the equipment after a switch accident happens when the switch accident trips or a switch is abnormally shifted, and generating the network tide flow graph according to the topological relation;
searching for a transformer substation with possible voltage loss, taking the transformer substation with a switching accident as a starting point according to the network tide diagram, taking the switch with the accident as a boundary point for inspecting the transformer substation with the possible voltage loss, judging the transformer substations with the current relation one by one, and judging the transformer substation as the transformer substation with the voltage loss when the bus line voltage of the transformer substation suddenly drops by 90% or is less than 1kV in inspection;
the transformer substation self-checking comprises the steps of carrying out self-checking on all transformer substations with voltage loss and confirming whether each transformer substation with voltage loss has an abnormal condition or not;
and locking the remote control, automatically locking the remote control function of the transformer substation when the transformer substation with the voltage loss has abnormal conditions, and sending an operation instruction containing abnormal condition information for confirming whether to continue locking or unlocking to the remote control end.
Further, the topological relation includes equipment nodes of each branch switch, the mother switch, the branch switches, the lines and the buses and the connection relation among the equipment nodes.
Further, the abnormal condition comprises an abnormal signal of remote control of the video switch, an accident signal of protective action, the disconnecting switch except the branch disconnecting switch of the maintenance interval is in an open position, the branch switch is in a closed position, the hydroelectric branch switch is in a closed position, the low-voltage low-cycle load shedding interval switch is in a closed position and the capacitor switch is in a closed position.
Further, the control instruction containing the abnormal condition information for confirming whether to continue locking or unlocking is displayed on the operation interface of the remote control end in a popup mode.
The invention has the following beneficial effects:
1. the invention discloses a method for preventing misoperation in an accident voltage loss area of a 35 kV-110 kV power grid on line, which is characterized in that a network tide graph after an accident occurs is generated through a topological system of the power grid, a voltage loss transformer substation is automatically searched, safety inspection is carried out on the voltage loss transformer substation, inspection contents comprise abnormal signals, equipment states and the like, when manual power transmission is carried out on the voltage loss transformer substation, if abnormal conditions exist, the remote control function of the voltage loss transformer substation is automatically locked, power transmission to fault equipment is prevented, and the accident range is expanded.
2. The invention discloses a method for preventing misoperation in an area of a 35 kV-110 kV power grid accident voltage loss area on line, which prompts an operator at a remote control end in a mode of a system interface popup window to assist the operator in judgment after the voltage loss accident occurs.
3. According to the method for preventing the online misoperation in the accident voltage loss area of the 35 kV-110 kV power grid, the abnormal condition information of the voltage loss transformer substation is intensively sent to an operator at a remote control end, the workload of the operator on analyzing signals after an accident is reduced, and the power transmission recovery efficiency is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1, a method for preventing misoperation in an accident voltage loss area of a 35 kV-110 kV power grid on line comprises the following steps:
the method comprises the following steps that S1, a network tide flow graph is generated, the topological relation among equipment nodes is obtained through a topological system arranged in a power grid, when the switching accident trips or a switch is abnormally shifted, the topological relation among the equipment after the switching accident happens is intercepted, and the network tide flow graph is generated according to the topological relation;
s2, searching for a transformer substation with possible voltage loss, judging the transformer substations with the trend relation one by taking the transformer substation with the switching accident as a starting point and taking the switch with the accident as a boundary point for inspecting the transformer substation with the possible voltage loss according to the network tide chart, and after delaying for 10 seconds, inspecting that the bus line voltage of one transformer substation suddenly drops by 90% or the bus line voltage is less than 1kV, and judging the transformer substation as the transformer substation with the voltage loss;
s3, self-checking the transformer substations, namely performing self-checking on all the transformer substations with the voltage loss, and confirming whether each transformer substation with the voltage loss has an abnormal condition;
and S4, locking remote control, automatically locking the remote control function of the transformer substation when the transformer substation with the voltage loss has abnormal conditions, sending an operation instruction containing abnormal condition information for confirming whether to continue locking or unlocking to the remote control end, and confirming the abnormal conditions by an operator of the remote control end and deciding to continue locking or unlocking the remote control function of the transformer substation with the voltage loss.
Further, the topological relation includes equipment nodes of each branch switch, the main switch, the branch switches, the lines and the buses and connection relations among the equipment nodes, wherein the overhauled and cold standby lines or equipment are not calculated.
Further, the abnormal condition comprises an abnormal signal of remote control of the image switch, an accident signal of protective action, the disconnecting switch except the branch disconnecting switch of the maintenance interval at an open position, the branch switch at a closed position, the hydroelectric branch switch at a closed position, the low-voltage low-cycle load shedding interval switch at a closed position and the capacitor switch at a closed position.
Further, the control instruction containing the abnormal condition information for confirming whether to continue locking or unlocking is displayed on the operation interface of the remote control end in a popup mode.
The working principle of the embodiment is as follows:
and converting the node branch into a transformer substation network tide graph by using a topological system, and intelligently identifying the transformer substation and the line in operation after removing the overhaul line and overhauling the transformer substation. When abnormal switch displacement or accident tripping occurs, a possible voltage-loss transformer substation is automatically searched in a network current diagram, the bus voltage of the transformer substation with possible voltage loss is searched, when the bus voltage of the transformer substation is searched to reach a voltage-loss fixed value, the transformer substation is judged to be in voltage loss after time delay, and then the automatic inspection function is further carried out on the voltage-loss transformer substation. When abnormal conditions occur after automatic inspection, interface popup window type alarming and automatic locking remote control function are adopted according to the severity of the abnormal conditions, and unlocking can be performed after manual confirmation, so that safety and reliability are guaranteed when power transmission of a voltage-loss transformer substation is recovered, and the condition of expanding the accident range is avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. A method for preventing misoperation in an 35kV to 110kV power grid accident voltage loss region on line is characterized by comprising the following steps:
generating a network tide flow graph, acquiring a topological relation among equipment nodes through a topological system built in a power grid, intercepting the topological relation among the equipment after a switch accident happens when the switch accident trips or a switch is abnormally shifted, and generating the network tide flow graph according to the topological relation;
searching potential voltage-loss substations, judging the substations in tidal current contact one by taking the substation with switch accidents as a starting point and taking the switch with accidents as a boundary point for inspecting the potential voltage-loss substations according to the network tidal current diagram, and judging the substation to be the voltage-loss substation when the busbar voltage of the substation suddenly drops by 90% or the busbar voltage is less than 1kV in the inspection process;
the transformer substation self-checking comprises the steps of carrying out self-checking on all the transformer substations with voltage loss, and confirming whether each transformer substation with voltage loss has an abnormal condition;
locking remote control, namely automatically locking a remote control function of a voltage-loss transformer substation when the voltage-loss transformer substation has abnormal conditions, and sending an operation instruction containing abnormal condition information for confirming whether to continue locking or unlocking to a remote control end;
the topological relation comprises equipment nodes of each branch switch, each mother switch, each branch switch, each line and each bus and the connection relation among the equipment nodes.
2. The method for preventing misoperation in an emergency voltage loss area of a 35kV to 110kV power grid according to claim 1, which is characterized in that: the abnormal condition comprises an abnormal signal of remote control of the image switch, an accident signal of protective action, the disconnecting link switch except the branch disconnecting link of the maintenance interval at an open position, the branch switch at a closed position, the hydroelectric branch switch at a closed position, the low-voltage low-cycle load shedding interval switch at a closed position and the capacitor switch at a closed position.
3. The method for preventing misoperation in the 35kV to 110kV power grid accident voltage loss region on line according to claim 1, wherein the method comprises the following steps: and the control instruction containing the abnormal condition information for confirming whether to continue locking or unlocking is displayed on the operation interface of the remote control end in a popup window mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011000636.8A CN112182816B (en) | 2020-09-22 | 2020-09-22 | Method for preventing misoperation in online mode in accident voltage loss region of 35 kV-110 kV power grid |
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| CN202011000636.8A CN112182816B (en) | 2020-09-22 | 2020-09-22 | Method for preventing misoperation in online mode in accident voltage loss region of 35 kV-110 kV power grid |
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| CN112182816B true CN112182816B (en) | 2023-02-28 |
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| CN113219292B (en) * | 2021-07-08 | 2021-11-26 | 广东电网有限责任公司梅州供电局 | Bus accident diagnosis method, device, equipment and storage medium |
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| CN101917063A (en) * | 2010-07-23 | 2010-12-15 | 广东电网公司中山供电局 | Method and system for automatically switching master station-centralized spare power source |
| CN107730093A (en) * | 2017-09-27 | 2018-02-23 | 广东电网有限责任公司佛山供电局 | A kind of System and method in power grid accident telegram in reply path |
| CN110138625A (en) * | 2019-07-09 | 2019-08-16 | 广东电网有限责任公司佛山供电局 | A kind of distribution main website self-healing method based on electric topology connection relationship |
| CN111049266A (en) * | 2019-12-25 | 2020-04-21 | 国网福建省电力有限公司龙岩供电公司 | Intelligent second-level power restoration method and system for regulation and control service |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9917436B2 (en) * | 2007-10-30 | 2018-03-13 | General Electric Company | System and method for control of power distribution |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917063A (en) * | 2010-07-23 | 2010-12-15 | 广东电网公司中山供电局 | Method and system for automatically switching master station-centralized spare power source |
| CN107730093A (en) * | 2017-09-27 | 2018-02-23 | 广东电网有限责任公司佛山供电局 | A kind of System and method in power grid accident telegram in reply path |
| CN110138625A (en) * | 2019-07-09 | 2019-08-16 | 广东电网有限责任公司佛山供电局 | A kind of distribution main website self-healing method based on electric topology connection relationship |
| CN111049266A (en) * | 2019-12-25 | 2020-04-21 | 国网福建省电力有限公司龙岩供电公司 | Intelligent second-level power restoration method and system for regulation and control service |
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