CN114614446A - Small power supply connection and disconnection method and device of automatic bus transfer device - Google Patents
Small power supply connection and disconnection method and device of automatic bus transfer device Download PDFInfo
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- CN114614446A CN114614446A CN202210270247.XA CN202210270247A CN114614446A CN 114614446 A CN114614446 A CN 114614446A CN 202210270247 A CN202210270247 A CN 202210270247A CN 114614446 A CN114614446 A CN 114614446A
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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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention relates to the technical field of spare power automatic switching, in particular to a small power supply connection and disconnection method and a device of a spare power automatic switching device, which comprise the following steps: identifying the operation mode of a substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation; if the substation bus is in the split operation, whether a certain small power supply meets all cutting conditions is judged, and then the small power supply is cut in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply; if the buses of the transformer substation are in parallel operation, all small power supplies are cut off after the incoming line power supply trips. The method and the device perform logic judgment on the operation mode of the bus of the transformer substation, the tripped incoming line power supply and the main power supply source related to the small power supply, accurately judge the small power supply to be cut off, selectively trip out a plurality of small power supplies, and avoid cutting off all the connected small power supplies when the main power supply source line trips.
Description
Technical Field
The invention relates to the technical field of spare power automatic switching, in particular to a small power supply connection and disconnection method and device of a spare power automatic switching device.
Background
The spare power automatic switching device plays an increasingly greater role in improving the power supply reliability, and when the main power supply is out of power, the spare power automatic switching device switches on the breaker of the spare power supply, and the spare power supply continues to supply power to ensure the continuity of the power supply. In the actual operation of a power grid, small power supplies often exist on all levels of buses of a transformer substation, and due to the existence of the small power supplies, the asynchronous switching-on problem can be caused after the spare power automatic switching-on action, and the damage to a rotor shaft system of a power supply unit exists.
At present, in order to avoid the problem of non-synchronous switching-on, the method is adopted for connecting and cutting a small power supply incoming line breaker after the spare power automatic switching-on action, although the method is simple, the following problems exist in the analysis from the practical operation angle of the transformer substation:
for a single-bus section or a double-bus substation, due to the requirement of operation mode adjustment, the operation mode can be operated in a split mode or in parallel, when the substation is operated in a split mode, if each section of bus of the substation contains a small power supply to operate, any main power supply incoming line trips, only the small power supply which operates on the bus or the corresponding lower-level bus needs to be switched in a combined mode, but the tripping mode is that no matter what operation mode is adopted, as long as a main power supply line trips, all the accessed small power supplies are cut off, the small power supplies which do not operate on the main power supply of the tripping position trip out at the same time, the tripping range is expanded, and economic loss is caused to power supply users.
Disclosure of Invention
The invention provides a small power supply combined switching method and a small power supply combined switching device for a spare power automatic switching device, overcomes the defects of the prior art, and can effectively solve the problems that when the existing main power supply line trips, the small power supply which does not run on the tripping main power supply also trips at the same time and the tripping range is enlarged in the method for cutting off all the connected small power supplies.
One of the technical schemes of the invention is realized by the following measures: a small power supply connection and disconnection method of a spare power automatic switching device comprises the following steps:
identifying the operation mode of a substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation;
if the substation bus is in the split operation, judging whether a certain small power supply meets all cutting conditions, and cutting the small power supply in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply;
if the buses of the transformer substation are in parallel operation, all small power supplies are cut off after the incoming line power supply trips.
The following is further optimization or/and improvement of the technical scheme of the invention:
the operation mode of the bus of the identification substation comprises the following steps:
acquiring a circuit breaker position signal of a first incoming line power supply, a circuit breaker position signal of a second incoming line power supply and a bus segmented circuit breaker position signal of the spare power automatic switching device;
if the position signals of the circuit breakers meet first identification conditions, the substation bus is in split operation, wherein the first identification conditions comprise that the circuit breaker of the incoming line power supply I is in a closed position, the circuit breaker of the incoming line power supply II is in a closed position, and the position signals of the bus segmented circuit breakers are in split positions;
if the position signals of the circuit breakers meet second identification conditions, the buses of the transformer substation are in parallel operation, wherein the second identification conditions comprise that 1, the circuit breakers of the incoming line power supply I are in the closed position, the circuit breakers of the incoming line power supply II are in the separated position, and the position signals of the bus segmented circuit breakers are in the closed position; 2. the circuit breaker of the incoming line power supply I is in a separating position, the circuit breaker of the incoming line power supply II is in a closing position, and the position signal of the bus sectional circuit breaker is in the closing position.
When above-mentioned transformer substation's generating line is in the branch row operation, and judge that certain little power satisfies all excision conditions, excise this little power, include:
the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
delaying the set delay time T;
and executing a linkage cutting instruction, and cutting off the corresponding small power supply.
The identification of the main power supply source related to the small power supply comprises the following steps: control word recognition or functional hard platen recognition.
Above-mentioned transformer substation's generating line is in operation side by side, and after the tripping operation of inlet wire power, excision all little powers includes:
the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
delaying the set delay time T;
and executing a linkage cutting instruction, and cutting off all small power supplies.
The second technical scheme of the invention is realized by the following measures: a small power supply combined switching device of a spare power automatic switching device comprises:
the identification unit is used for identifying the operation mode of the substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation;
the first judgment execution unit judges whether a certain small power supply meets all cutting conditions if the substation bus is in split operation, and then cuts the small power supply in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply;
and if the buses of the transformer substation are in parallel operation, the second judgment execution unit cuts off all small power supplies after the incoming line power supply trips.
The method and the device perform logic judgment on the operation mode of the bus of the transformer substation, the tripped incoming line power supply and the main power supply source associated with the small power supply, accurately judge the small power supply to be cut off, and selectively trip out a plurality of small power supplies, so that the problems that when the main power supply source line trips, all the small power supplies connected are cut off, the small power supply not tripping at the main power supply source running but tripping at the same time is caused, the tripping range is expanded, and economic losses are caused to power supply users are solved.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of the structure of the device of the present invention.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
The invention is further described with reference to the following examples and figures:
example 1: as shown in fig. 1, the embodiment of the invention discloses a small power supply connection and disconnection method of a spare power automatic switching device, which comprises the following steps:
step S101, identifying the operation mode of the substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation, and the method specifically comprises the following steps:
1. acquiring a breaker position signal of a first incoming line power supply, a breaker position signal of a second incoming line power supply and a bus segmented breaker position signal of the spare power automatic switching device, and identifying the operation mode of the transformer substation through the three breaker positions;
2. if the position signals of the circuit breakers meet first identification conditions, the substation bus is in split operation, wherein the first identification conditions comprise that the circuit breaker of the incoming line power supply I is in a closed position, the circuit breaker of the incoming line power supply II is in a closed position, and the position signals of the bus segmented circuit breakers are in split positions;
3. if the position signals of the circuit breakers meet second identification conditions, the buses of the transformer substation are in parallel operation, wherein the second identification conditions comprise that 1, the circuit breaker of the incoming line power supply I is in a closed position, the circuit breaker of the incoming line power supply II is in a separated position, and the position signals of the bus segmented circuit breakers are in a closed position; 2. the circuit breaker of the incoming line power supply I is in a separating position, the circuit breaker of the incoming line power supply II is in a closing position, and the position signal of the bus sectional circuit breaker is in the closing position.
Step S102, if the bus of the transformer substation is in split operation, whether a certain small power supply meets all cutting conditions is judged, and the small power supply is cut in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply;
here, in response to the above, when the small power supply is cut off, a delay time needs to be preset, which specifically includes:
1. the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
2. delaying the set delay time T;
3. and executing a linkage cutting instruction, and cutting off the corresponding small power supply.
And S103, if the buses of the transformer substation are in parallel operation, all small power supplies are cut off after the incoming line power supply trips.
Here transformer substation's generating line is in parallel operation, and after the inlet wire power trip, all little powers of excision include:
1. the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
2. delaying the set delay time T;
3. and executing a linkage cutting instruction, and cutting off all small power supplies.
The above-mentioned identification of the main power supply source associated with the small power supply source herein includes: control word recognition or functional hard platen recognition.
For example, if 3 paths of small power sources are set to be switched in series, the identification of the main power supply source associated with the small power source is as follows:
(1) if the program control word is used for realizing the method, the following sentences are added in the human-computer interaction interface:
1. the small power supply G1 is associated with a main power supply selection: 1 or 2;
2. the small power supply G2 is associated with a main power supply selection: 1 or 2;
3. the small power supply G3 is associated with a main power supply selection: 1 or 2;
description of the drawings: the above "1" represents the small power supply associated main supply incoming line power supply I, and the "2" represents the small power supply associated main supply incoming line power supply II;
(2) the main power supply I and the incoming power supply II are defined and determined by a functional hard pressing plate;
1. add 3 functional hard pressboards on the device screen:
2. the small power supply G1 is connected with the main power supply to be switched on or off: putting in or withdrawing;
3. the small power supply G2 is connected with the main power supply to be switched on or off: putting in or withdrawing;
4. the small power supply G3 is connected with the main power supply to be switched on or off: putting in or withdrawing;
description of the drawings: the above hard pressing plate 'on' represents the small power supply associated with the primary power supply I, and 'off' represents the small power supply associated with the primary power supply II.
Therefore, based on the identification of the main power supply source associated with the small power supply, the small power supply connection and disconnection of the corresponding backup power automatic switching device can be specifically as follows:
(1) busbar split operation 1
When a bus of the transformer substation is in split operation, after an incoming line power supply trips, a small power supply Gn (n represents small power supplies 1, 2 and 3) in a program control word is associated with a main power supply and is selected to be set to be 1, or the small power supply Gn is associated with a main power supply and is switched on, all cutting conditions are met, and the small power supply Gn is cut. Otherwise, the small power supply Gn in the program control word is associated with the main power supply to select to be set to be 2, or the small power supply Gn is associated with the main power supply to be hard pressed to be retracted, the small power supply Gn is not cut off.
(2) Busbar split operation 2
When the bus of the transformer substation is in split operation, after the incoming line power supply II trips, the small power supply Gn related to the main power supply is selectively set to be 2 in the program control word, or when the small power supply Gn related to the main power supply hard pressing plate is withdrawn, all cutting conditions are met, and the small power supply Gn is cut. And (3) when the small power supply Gn is related to the main power supply and is selected to be set to be 1 in the program control word, or the small power supply Gn is related to the main power supply and is switched on by a hard pressure plate, the small power supply Gn is not cut off.
(3) Bus-bar parallel operation 1
When the buses of the transformer substation operate in parallel, namely the bus tie circuit breaker is in a closed position, the circuit breaker of the incoming line power supply I is in a closed position, the circuit breaker of the incoming line power supply II is in a separated position, namely after the incoming line power supply I trips, the program does not execute the selection of the small power supply Gn-associated main power supply or the switching-on and switching-off criterion of the small power supply Gn-associated main power supply hard pressing plate, and the default small power supplies G1, G2 and G3 are all cut off.
(4) Bus parallel operation 2
When the buses of the transformer substation run in parallel, namely the bus tie circuit breaker is in a closed position, the incoming line power supply second circuit breaker is in a closed position, the incoming line power supply first circuit breaker is in a separated position, namely after the incoming line power supply second circuit breaker trips, a program does not execute small power supply Gn-associated main power supply selection or small power supply Gn-associated main power supply hard pressing plate switching criterion, and all the small power supplies G1, G2 and G3 are cut off in a default mode.
The invention discloses a small power supply joint-cutting method of a self-switching device, which is used for logically judging the operation mode of a bus of a transformer substation, a tripped incoming line power supply and a main power supply source related to the small power supply, accurately judging the small power supply to be cut off and selectively tripping a plurality of small power supplies so as to avoid the problems that when a main power supply line is tripped, all the connected small power supplies are cut off, the small power supplies which are not tripped run in the main power supply source and are also tripped at the same time, the tripping range is expanded and economic losses are caused to power supply users.
Example 2: as shown in fig. 1, the embodiment of the present invention discloses a small power source connection and disconnection device of a backup power automatic switching device, which comprises:
the identification unit is used for identifying the operation mode of the substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation;
the first judgment execution unit judges whether a certain small power supply meets all cutting conditions if the substation bus is in split operation, and then cuts the small power supply in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply;
and if the buses of the transformer substation are in parallel operation, the second judgment execution unit cuts off all small power supplies after the incoming line power supply trips.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (9)
1. A small power supply connection and disconnection method of a spare power automatic switching device is characterized by comprising the following steps:
identifying the operation mode of a substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation;
if the substation bus is in the split operation, whether a certain small power supply meets all cutting conditions is judged, and then the small power supply is cut in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply;
if the buses of the transformer substation are in parallel operation, all small power supplies are cut off after the incoming line power supply trips.
2. The small power source connection and disconnection method of the spare power automatic switching device according to claim 1, wherein the step of identifying the operation mode of the substation bus comprises the following steps:
acquiring a breaker position signal of an inlet wire power supply I, a breaker position signal of an inlet wire power supply II and a bus segmented breaker position signal of a spare power automatic switching device;
if the position signals of the circuit breakers meet first identification conditions, the substation bus is in split operation, wherein the first identification conditions comprise that the circuit breaker of the incoming line power supply I is in a closed position, the circuit breaker of the incoming line power supply II is in a closed position, and the position signals of the bus segmented circuit breakers are in split positions;
if the position signals of the circuit breakers meet second identification conditions, the buses of the transformer substation are in parallel operation, wherein the second identification conditions comprise that 1, the circuit breakers of the incoming line power supply I are in the closed position, the circuit breakers of the incoming line power supply II are in the separated position, and the position signals of the bus segmented circuit breakers are in the closed position; 2. the circuit breaker of the incoming line power supply I is in a separating position, the circuit breaker of the incoming line power supply II is in a closing position, and the position signal of the bus sectional circuit breaker is in the closing position.
3. The small power supply connection and disconnection method of the spare power automatic switching device according to claim 1 or 2, wherein when the substation bus is in split operation, and when it is judged that a certain small power supply meets all disconnection conditions, the disconnection method of the small power supply comprises the following steps:
the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
delaying the set delay time T;
and executing a linkage cutting instruction, and cutting off the corresponding small power supply.
4. The small power source connection and disconnection method for the spare power automatic switching device according to claim 1 or 2, wherein the identification of the main power source associated with the small power source comprises: control word recognition or functional hard platen recognition.
5. The small power source connection and disconnection method of the spare power automatic switching device according to claim 3, wherein the identification of the main power source associated with the small power source comprises: control word recognition or functional hard platen recognition.
6. The small power supply connection and disconnection method for the spare power automatic switching device according to claim 1, 2 or 5, wherein the substation bus is in parallel operation, and all small power supplies are cut off after an incoming power supply is tripped, and the method comprises the following steps:
the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
delaying the set delay time T;
and executing a linkage cutting instruction, and cutting off all small power supplies.
7. The small power supply connection and disconnection method of the spare power automatic switching device according to claim 3, wherein the substation bus is in parallel operation, and all small power supplies are disconnected after an incoming power supply is tripped, and the method comprises the following steps:
the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
delaying the set delay time T;
and executing a linkage cutting instruction, and cutting off all small power supplies.
8. The small power supply connection and disconnection method of the spare power automatic switching device according to claim 4, wherein the substation bus is in parallel operation, and all small power supplies are disconnected after an incoming power supply is tripped, and the method comprises the following steps:
the spare power automatic switching device generates a connection and cutting instruction, and starts connection and cutting according to the connection and cutting instruction;
delaying the set delay time T;
and executing a linkage cutting instruction, and cutting off all small power supplies.
9. A small power source connection and disconnection device of a backup automatic switching device, wherein the rule generalization and attack reconstruction-based network attack detection device uses the small power source connection and disconnection method of the backup automatic switching device according to any one of claims 1 to 8, and the method comprises:
the identification unit is used for identifying the operation mode of the substation bus, wherein the operation mode of the substation bus comprises split operation and parallel operation;
the first judgment execution unit judges whether a certain small power supply meets all cutting conditions if the substation bus is in split operation, and then cuts the small power supply in response to the judgment, wherein the cutting conditions comprise: the main power supply source related to the tripping of a certain inlet wire power supply and the small power supply and the inlet wire power supply which is tripped are the same power supply;
and if the buses of the transformer substation are in parallel operation, the second judgment execution unit cuts off all small power supplies after the incoming line power supply trips.
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| CN202210270247.XA CN114614446A (en) | 2022-03-18 | 2022-03-18 | Small power supply connection and disconnection method and device of automatic bus transfer device |
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| CN202210270247.XA CN114614446A (en) | 2022-03-18 | 2022-03-18 | Small power supply connection and disconnection method and device of automatic bus transfer device |
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