CN114389239B - Bus protection voltage judging method and device of hand-in-hand wiring mode and storage medium - Google Patents
Bus protection voltage judging method and device of hand-in-hand wiring mode and storage medium Download PDFInfo
- Publication number
- CN114389239B CN114389239B CN202111571870.0A CN202111571870A CN114389239B CN 114389239 B CN114389239 B CN 114389239B CN 202111571870 A CN202111571870 A CN 202111571870A CN 114389239 B CN114389239 B CN 114389239B
- Authority
- CN
- China
- Prior art keywords
- voltage
- breaker
- incoming line
- line branch
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000001681 protective effect Effects 0.000 claims abstract description 50
- 238000004590 computer program Methods 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 15
- 230000005856 abnormality Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a bus protection voltage judging method, a device and a storage medium of a hand-in-hand wiring mode, wherein the method comprises the following steps: acquiring breaker position information, incoming line branch current data and incoming line branch voltage data of breaker switches C1 and C2 on two incoming line branches; judging the positions of the protective circuit breakers of C1 and C2 according to the corresponding circuit breaker position information and the incoming line branch current data respectively; determining the voltage of an incoming line branch circuit which should be selected for bus protection according to the positions of the circuit breakers for protection of C1 and C2 and the current data of each incoming line branch circuit; based on the obtained incoming line branch voltage data, judging whether incoming line branch voltage which should be selected by bus protection meets the preset bus protection voltage locking condition, if so, judging that the bus protection voltage locking is opened, and if a fault in a bus area occurs, allowing corresponding bus protection action. The invention optimizes the bus protection voltage switching selection logic and can improve the reliability of bus voltage protection.
Description
Technical Field
The invention relates to the technical field of power system protection control, in particular to a bus protection voltage judgment method and device in a hand-in-hand wiring mode and a storage medium.
Background
The safe and stable operation of the power system is the basis for guaranteeing national economy and social development, and the requirement on the stability of the power system is increasingly remarkable along with the continuous high-speed development of the economy.
A typical hand-in-hand wiring power supply mode is shown in a drawing 1 of the specification, a C, D, E transformer substation is also called a chain structure series transformer substation, a C station is taken as an example, a series supply loop consisting of C1, C2 and C3 is required to be configured, a set of bus protection device is required to be configured as shown in a drawing 2, a main wiring mode is a single bus, and a single bus main wiring bus protection device is also required to be configured for C4, C5 and C6.
Because the bus PT is not generally configured on the high-voltage side bus in the hand-in power supply mode, the bus protection needs to acquire the voltage of the incoming line side PT for logic judgment, and the accuracy of the voltage directly influences whether the whole bus protection can act correctly when the system fails, therefore, the research and improvement of the bus protection voltage switching method suitable for the hand-in wiring mode is necessary.
In addition, in the actual system operation, there may be two wires C1, C2 with two split or double combined positions of the abnormal working conditions, at the same time, for some extreme working conditions, such as two wires of the switch position is actually split and combined, and at the same time, the situation that the respective positions are not corresponding will occur, at this time, the bus protection voltage should be selected, and the prior art does not propose a reliable and effective solution.
Disclosure of Invention
The invention aims to provide a bus protection voltage judging method, device and storage medium of a hand-in-hand wiring mode, which optimize bus protection voltage switching selection logic and improve bus voltage protection reliability. The technical scheme adopted by the invention is as follows.
On the one hand, the invention provides a bus protection voltage judging method of a hand-in wiring mode, in the hand-in wiring mode, a bus is connected with a first incoming line branch and a second incoming line branch, a breaker switch C1 is arranged on the first incoming line branch, and a breaker switch C2 is arranged on the second incoming line branch;
The bus protection judging method comprises the following steps:
acquiring the position information of a breaker of the breaker switches C1 and C2, current data of each incoming line branch circuit and voltage data of each incoming line branch circuit;
For C1 and C2, judging the positions of the protective circuit breakers of C1 and C2 according to the corresponding circuit breaker position information and the incoming line branch current data respectively;
Determining the voltage of an incoming line branch circuit which should be selected for bus protection according to the positions of the circuit breakers for protection of C1 and C2 and the current data of each incoming line branch circuit;
Based on the obtained incoming line branch voltage data, judging whether incoming line branch voltage which should be selected by bus protection meets a preset bus protection voltage locking opening condition, and if so, judging that the bus protection voltage locking opening is carried out.
The bus voltage blocking opening is one of the requirements of the bus protection operation, and under the bus voltage blocking opening condition, if a fault occurs in the bus area, the bus protection operation is allowed to cut off the fault.
Optionally, the determining the protection circuit breaker positions of C1 and C2 includes:
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is located has a current, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch close position;
If the breaker position information of the breaker switch corresponds to the switch closing position, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch closing position;
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is located is not current, judging that the protective breaker position TWJ of the breaker switch is 1, and corresponds to the switch split position.
Optionally, the judging condition that the incoming line branch where the breaker switch is located has a flow is as follows: and if the corresponding incoming line branch circuit still continues to have flow after the delay is set from the moment when the position information of the circuit breaker is acquired and the corresponding switch is located, judging that the incoming line branch circuit has flow. The delay judging mode can prevent the current of the line from being caused by short-time CT abnormality, and can realize more accurate judgment of the state of the incoming line branch.
Optionally, the method further comprises: when judging the positions of the protective circuit breakers of C1 and C2, if the circuit breaker position information of the circuit breaker switch corresponds to the switch division position and the incoming line branch circuit where the circuit breaker switch is positioned continuously has flow in a set duration, judging that the corresponding circuit breaker switch is abnormal, and outputting an abnormal alarm signal.
Optionally, the determining the voltage of the incoming line branch circuit used for bus protection according to the positions of the protective circuit breakers of C1 and C2 and the current data of each incoming line branch circuit includes:
If the protective circuit breaker positions TWJ of the C1 and the C2 are 0 and no current exists in the incoming line branch circuit where the C1 is located, the voltage of the incoming line branch circuit where the C2 is located is selected as the bus protective voltage;
if the protective circuit breaker positions TWJ of the C1 and the C2 are 0 and no current exists in the incoming line branch circuit where the C2 is located, the voltage of the incoming line branch circuit where the C1 is located is selected as the bus protective voltage;
If the protective breaker positions TWJ of the C1 and the C2 are 0 and the incoming line branches of the C1 and the C2 have current, the voltages of the two incoming line branches of the C1 and the C2 are selected to be used as bus protection voltages.
In the above scheme, that is, if the protective circuit breaker positions TWJ of C1 and C2 are both 0 and only one incoming branch is not flowing, the voltage of the flowing one incoming branch is taken as the bus protection voltage.
Optionally, if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0 and the incoming line branches where C1 and C2 are located have flows, determining that the bus protection voltage is blocked and opened when both the incoming line branches where C1 and C2 are located meet the protection voltage blocking and opening determination condition.
In the above scheme, that is, if the protective circuit breaker positions TWJ of C1 and C2 are both 0 and at least one incoming line branch has current, the voltage of the incoming line branch having current is taken as the bus protection voltage.
Optionally, the determining, according to the positions of the protection circuit breakers of C1 and C2 and the current data of each incoming line branch circuit, the incoming line branch voltage that should be selected for bus protection further includes:
If the protection circuit breaker positions of C1 and C2 are different, the voltage of the incoming line branch where the circuit breaker switch with the protection circuit breaker position TWJ of 0 is located is taken as the bus protection voltage.
Optionally, when determining the voltage of the line incoming branch line which should be selected for bus protection according to the positions of the protection circuit breakers of C1 and C2 and the current data of each line incoming branch line, if the positions TWJ of the protection circuit breakers of C1 and C2 are both 1, the bus protection does not need to consider the line incoming voltage, at this time, the bus protection voltage can be directly determined to be blocked and opened, and when the fault occurs in the bus area, the corresponding bus protection action is allowed.
In a second aspect, the invention provides a bus protection voltage judging device in a hand-in-hand wiring mode, wherein a bus is connected with a first incoming line branch and a second incoming line branch, a circuit breaker switch C1 is arranged on the first incoming line branch, and a circuit breaker switch C2 is arranged on the second incoming line branch;
The bus bar protection voltage determination device includes:
The data acquisition module is configured to acquire breaker position information of the breaker switches C1 and C2, current data of each incoming branch and voltage data of each incoming branch;
A protection circuit breaker position judging module configured to judge, for C1 and C2, protection circuit breaker positions of C1 and C2 according to corresponding circuit breaker position information and incoming line branch current data, respectively;
The bus protection voltage selection module is configured to determine the voltage of the incoming line branch circuit which should be selected for bus protection according to the positions of the circuit breakers for protection of C1 and C2 and the current data of each incoming line branch circuit;
And the bus protection voltage judging module is configured to judge whether the line incoming branch voltage which should be selected by the bus protection meets the preset bus protection voltage locking opening condition based on the obtained line incoming branch voltage data, and judge that the bus protection voltage locking is opened if the line incoming branch voltage meets the preset bus protection voltage locking opening condition.
Optionally, the protection circuit breaker position determining module determines the protection circuit breaker positions of C1 and C2, including:
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is located has current, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch on position;
If the breaker position information of the breaker switch corresponds to the switch closing position, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch closing position;
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is located is not current, judging that the protective breaker position TWJ of the breaker switch is 1, and corresponds to the switch split position.
Optionally, the bus protection voltage selecting module determines the voltage of the incoming line branch circuit that should be selected by bus protection:
if the protective breaker positions TWJ of the C1 and the C2 are 0 and at least one incoming line branch circuit has current, taking the voltage of the current incoming line branch circuit as the bus protection voltage;
If the positions of the protective circuit breakers of C1 and C2 are different, taking the voltage of the incoming line branch circuit where the circuit breaker switch with the protective circuit breaker position TWJ of 0 is located as the bus protection voltage;
if the protective circuit breaker positions TWJ of C1 and C2 are both 1, the bus protection does not need to consider the incoming line voltage, and the bus protection voltage determination module determines that the bus protection voltage is blocked and opened.
In a third aspect, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the bus bar protection voltage determination method of the hand-held wiring method according to the first aspect.
Advantageous effects
According to the bus protection voltage judging method of the hand-in-hand wiring mode, firstly, initial judgment of a theoretical value of circuit breaker switch protection TWJ and an operation condition of an incoming line branch is carried out according to an external TWJ state and a branch current condition of the circuit breaker switch, then incoming line branch voltage which should be selected for bus protection is selected according to the initial judgment result, and judgment of a bus protection voltage blocking protection state is carried out according to the selected incoming line branch voltage, so that bus protection voltage judging logic under various combined working conditions of protection TWJ and direct current can be perfected, common working conditions and various extreme working conditions of the hand-in-hand wiring mode can be dealt with, efficient switching of bus protection voltage is achieved, reliable operation of bus protection is guaranteed, safety and stability of power grid operation are improved, power supply quality can be effectively improved, and power grid operation efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a typical system power mode for a pull tab connection;
FIG. 2 is a flow chart of an embodiment of a bus protection determination method of the present invention;
FIG. 3 is a schematic diagram of TWJ acknowledge logic for C1 protection;
FIG. 4 is a schematic diagram of TWJ acknowledge logic for C2 protection;
FIG. 5 is a schematic diagram of the voltage switching logic of the C1 and C2 double-bit circuit;
FIG. 6 is a schematic diagram of the voltage switching logic of the C1-bit and C2-bit;
FIG. 7 is a schematic diagram of the voltage switching logic of the C1 split and C2 combined bits;
FIG. 8 is a schematic diagram of a voltage switching logic of the C1 and C2 bi-parting;
FIG. 9 is a schematic diagram of an in-zone fault of a pull tab mode of connection under special conditions.
Detailed Description
Further description is provided below in connection with the drawings and the specific embodiments.
Example 1
The embodiment introduces a bus protection voltage judging method of a hand-in-hand wiring mode.
Referring to the main wiring diagram of the hand-in wiring mode shown in fig. 1, each low-voltage side bus is connected with two high-voltage side buses through a first incoming line branch and a second incoming line branch, taking 110kV station C therein as an example, referring to fig. 9 again, a breaker switch C1, a current transformer CT1 and a voltage transformer PT1 are arranged on the first incoming line branch of the 110kV bus, and a breaker switch C2, a current transformer CT2 and a voltage transformer PT2 are arranged on the second incoming line branch.
Referring to fig. 2, the bus bar protection voltage determination method of the present embodiment includes:
acquiring breaker position information of the breaker switches C1 and C2, namely external TWJ opening information; acquiring current data of each incoming line branch, namely current data acquired by CT1 and CT 2; acquiring voltage data of each incoming line branch, namely voltage data acquired by PT1 and PT 2;
For C1 and C2, judging the positions of the protective circuit breakers of C1 and C2 according to the corresponding circuit breaker position information and incoming line branch current data, wherein the positions are abbreviated as protective TWJ of C1 and C2;
determining the voltage of an incoming line branch circuit which should be selected for bus protection according to the positions of the protective circuit breakers of C1 and C2, namely protective TWJ and the current data of each incoming line branch circuit;
Based on the obtained incoming line branch voltage data, judging whether the incoming line branch voltage which should be selected by bus protection meets the preset bus voltage locking opening condition, and if so, judging that the bus voltage locking opening is carried out. And in the bus voltage locking open state, if a fault occurs in the bus area, allowing corresponding bus protection action to cut off the fault.
The process of the present embodiment for bus bar protection determination is specifically described below.
1. Determination of TWJ for protection of C1 and C2
Referring to fig. 3 and 4, in this embodiment, the positions of the protection circuit breakers of the circuit breakers C1 and C2, i.e. the protection TWJ, are determined according to the external TWJ switch-in and the current conditions of the branch circuit where the switch is located, and the circuit breaker position information to be obtained by the method is derived from the external TWJ switch-in. The determination process of the TWJ for protection is specifically as follows:
as shown in fig. 3, when the external TWJ of C1 is opened to 1 and no flow exists in the incoming branch where C1 is located, it is determined that the TWJ for protection of C1 is 1. If the external TWJ of C1 is turned on to 1 and the incoming line branch where C1 is located is delayed to determine that there is a continuous flow, it is assumed that C1 is theoretically co-located, and the TWJ for protection of C1 is 0. At the moment, the situation that the C1 is not corresponding to the generated position can be judged at the same time, and a C1 position abnormality warning signal can be output. If the external TWJ of C1 is turned on to 0, it is directly obtained that the TWJ for protection of C1 is 0.
As shown in fig. 4, when the external TWJ of C2 is turned on to 1 and the incoming line branch where C2 is located is not flowing, the confirmation logic of the TWJ for protection of C2 is similar to C1, and the TWJ for protection of C2 is determined to be 1. If the external TWJ of C2 is turned on to 1 and the incoming line branch where C2 is located is delayed to determine that there is a continuous flow, it is assumed that C2 is theoretically in the merging position, and the TWJ for protecting C2 is 0. At the moment, the situation that the C2 position is not corresponding can be judged at the same time, and a C2 position abnormality warning signal can be output. If the external TWJ of C2 is turned on to 0, it is directly obtained that the TWJ for protection of C2 is 0.
The continuous current existence of the incoming line branch circuit after delay judgment means that the incoming line branch circuit still continuously has current after the delay is set from the moment when the TWJ outside the breaker switch is 1. The delay judging mode can prevent the current of the line from being caused by short-time CT abnormality, and can realize more accurate judgment of the state of the incoming line branch.
2. Bus protection voltage selection switch
The embodiment comprehensively considers various working condition combinations of the hand-in-hand wiring mode, and designs the following bus protection voltage selection switching and bus protection voltage judging logic.
(1) Referring to fig. 5, if the protective circuit breaker positions TWJ of C1 and C2 are twj=0 and at least one incoming branch has a current, the voltage of the incoming branch having a current is taken as the bus protection voltage:
If TWJ for protection of C1 and C2 is 0 and no current exists in the incoming line branch where C1 is located, the incoming line branch voltage where C2 is located is selected as bus protection voltage, the incoming line branch voltage where C2 is located is opened, bus voltage is closed and opened, and corresponding bus protection action is allowed when faults occur in a bus area;
if TWJ for protection of C1 and C2 is 0 and no current exists in the incoming line branch where C2 is located, the incoming line branch voltage where C1 is located is selected as bus protection voltage, the incoming line branch voltage where C1 is located is opened, bus voltage is closed and opened, and corresponding bus protection action is allowed when faults occur in a bus area;
If the protective circuit breaker positions TWJ of C1 and C2 are twj=0 and the incoming line branches where C1 and C2 are located have flows, the incoming line branch voltages where C1 and C2 are located are selected to be used as the bus protection voltages, if the two incoming line branches are open, the bus voltage is closed and opened, and when the bus area fails, corresponding bus protection actions are allowed.
(2) If the protection circuit breaker positions of C1 and C2 are different, the voltage of the line-incoming branch where the circuit breaker switch with the protection circuit breaker position of twj=0 is located is taken as the bus protection voltage:
referring to fig. 6, if twj=0 for protection of C1 and twj=1 for protection of C2, selecting the voltage of the incoming line branch where C1 is located as the bus protection voltage, and when the voltage of the incoming line branch where C1 is located is open, locking and opening the bus voltage, and allowing corresponding bus protection operation when the bus area fails;
Referring to fig. 7, if twj=1 for protection of C1 and twj=0 for protection of C2, the voltage of the incoming line branch where C2 is located is selected as the bus protection voltage, and when the voltage of the incoming line branch where C2 is located is open, the bus voltage is blocked and opened, and when the bus area fails, the corresponding bus protection operation is allowed.
(3) Referring to fig. 8, if the positions of the protection circuit breakers of C1 and C2 are twj=1, the bus protection does not need to consider the incoming line voltage, and if the protection TWJ of C1 and C2 does not change after the delay time is set for a long time, it is determined that the bus voltage is blocked and opened, and when the fault occurs in the bus area, the corresponding bus protection operation is allowed.
According to the bus protection voltage selection switching logic and the bus protection voltage judgment logic, the embodiment can cope with various working conditions of a hand-in-hand wiring mode, including extreme working conditions. As shown in fig. 9, in the extreme working condition, the actual positions of the circuit breaker switches C1 and C2 of the 2 incoming line branches are one-to-one, and meanwhile, the positions do not correspond to each other:
No current exists in the incoming line branch where C1 and C2 are located, and the voltage of the incoming line branch where C1 and C2 are located is not opened;
The switch positions of C1 are inconsistent, and the external TWJ is turned on to 0, and at this time, the method of this embodiment will determine that the TWJ for protection of C1 is 0, but the actual C1 switch is split;
The switch positions of C2 are inconsistent, the external TWJ is turned on to be 1, and no current flows in the incoming line branch, and at this time, the method of this embodiment will determine that the protective TWJ of C2 is 1, but the actual C2 switch is in the closed position.
According to the voltage switching logic shown in fig. 6, if twj=0 of C1 and twj=1 of C2, the line branch voltage where C1 is located is selected as the bus bar protection voltage, and if the C1 voltage is not open, the bus bar voltage is not open. If a fault occurs in the bus area at this time, an actual fault current will flow through C2, and C2 is split for a long time but flows, and it is determined that C2 is actually in the closed position by referring to the TWJ determination logic for protection shown in fig. 4, the TWJ for protection of C2 becomes 0. According to the voltage switching logic shown in fig. 5, if TWJ of C1 and C2 are both 0 and there is a current in the incoming line branch where C2 is located, the incoming line branch voltage where C2 is located is selected as the bus protection voltage, and if the incoming line branch voltage where C2 is located is open, the bus voltage is blocked and opened, so that the bus protection action is allowed to cut off the bus fault.
The above application example can show that the bus protection voltage switching logic and the corresponding bus protection voltage judging method of the embodiment can effectively realize the extreme working condition of the hand-in-hand wiring mode and realize the reliable operation of bus protection.
Example 2
Based on the same inventive concept as embodiment 1, this embodiment describes a bus bar protection voltage determination device of a hand-in-hand wiring scheme, including:
The data acquisition module is configured to acquire breaker position information of the breaker switches C1 and C2, current data of each incoming branch and voltage data of each incoming branch;
A protection circuit breaker position judging module configured to judge, for C1 and C2, protection circuit breaker positions of C1 and C2 according to corresponding circuit breaker position information and incoming line branch current data, respectively;
The bus protection voltage selection module is configured to determine the voltage of the incoming line branch circuit which should be selected for bus protection according to the positions of the circuit breakers for protection of C1 and C2 and the current data of each incoming line branch circuit;
And the bus protection voltage judging module is configured to judge whether the line incoming branch voltage which should be selected by bus protection meets the bus voltage protection fixed value or not based on the obtained line incoming branch voltage data, and if so, the bus voltage is judged to be open, and corresponding bus protection action needs to be started.
Specific functional implementation of the above modules is described specifically below with reference to the relevant matters in the method of embodiment 1.
The protection circuit breaker position determination module determines the protection circuit breaker positions of C1 and C2, including:
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is positioned is not current, judging that the breaker position TWJ=1 for protection of the breaker switch corresponds to the switch split position;
If the breaker position information of the breaker switch corresponds to the switch closing position, the breaker position twj=0 for protection of the breaker switch is determined to correspond to the switch closing position.
The bus protection voltage selecting module is used for determining the voltage of the incoming line branch circuit which should be selected by bus protection:
if the positions of the protective circuit breakers of C1 and C2 are TWJ=0 and at least one incoming line branch circuit has current, taking the voltage of the incoming line branch circuit with current as the bus protection voltage;
If the positions of the protection circuit breakers of C1 and C2 are different, taking the voltage of the incoming line branch circuit where the circuit breaker switch with the position of TWJ=0 is located as the bus protection voltage;
If the positions of the protection circuit breakers of C1 and C2 are twj=1, the bus protection does not need to consider the incoming line voltage, and the bus protection voltage judgment module judges that the bus voltage is blocked and opened, and when a fault occurs in the bus area, the corresponding bus protection operation is allowed.
Example 3
This embodiment describes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the bus bar protection determination method of the hand-held wiring scheme as described in embodiment 1.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are all within the protection of the present invention.
Claims (6)
1. In the hand-in-hand wiring mode, a bus is connected with a first incoming line branch and a second incoming line branch, a breaker switch C1 is arranged on the first incoming line branch, and a breaker switch C2 is arranged on the second incoming line branch;
The bus protection voltage judging method is characterized by comprising the following steps of:
acquiring the position information of a breaker of the breaker switches C1 and C2, current data of each incoming line branch circuit and voltage data of each incoming line branch circuit;
For C1 and C2, judging the positions of the protective circuit breakers of C1 and C2 according to the corresponding circuit breaker position information and the incoming line branch current data respectively;
The judging of the protection circuit breaker positions of C1 and C2 includes:
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is located has a current, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch close position;
If the breaker position information of the breaker switch corresponds to the switch closing position, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch closing position;
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is positioned is not current, judging that the protective breaker position TWJ of the breaker switch is 1 and corresponds to the switch split position;
Determining the voltage of an incoming line branch circuit which should be selected for bus protection according to the positions of the circuit breakers for protection of C1 and C2 and the current data of each incoming line branch circuit;
The determining the voltage of the incoming line branch circuit which should be selected for bus protection according to the positions of the protective circuit breakers of C1 and C2 and the current data of each incoming line branch circuit comprises the following steps:
If the protective circuit breaker positions TWJ of the C1 and the C2 are 0, the incoming line branch circuit where the C1 is positioned has no current, and the incoming line branch circuit where the C2 is positioned has current, the voltage of the incoming line branch circuit where the C2 is positioned is selected as the bus protection voltage;
if the protective circuit breaker positions TWJ of the C1 and the C2 are 0 and the incoming line branch circuit where the C2 is positioned has no current and the incoming line branch circuit where the C1 is positioned has current, selecting the voltage of the incoming line branch circuit where the C1 is positioned as the bus protection voltage;
If the protective breaker positions TWJ of the C1 and the C2 are 0 and the incoming line branches of the C1 and the C2 have flows, the voltages of the two incoming line branches of the C1 and the C2 are selected to be used as bus protective voltages;
If the positions of the protective circuit breakers of C1 and C2 are different, taking the voltage of the incoming line branch circuit where the circuit breaker switch with the protective circuit breaker position TWJ of 0 is located as the bus protection voltage;
Judging whether the line-incoming branch voltage which should be selected by bus protection meets the preset bus protection voltage locking opening condition or not based on the obtained line-incoming branch voltage data, and judging that the bus protection voltage locking opening is met if the line-incoming branch voltage which should be selected by the bus protection meets the preset bus protection voltage locking opening condition;
When the line incoming branch voltage which should be selected by the bus protection is determined according to the protection circuit breaker positions of C1 and C2 and the current data of each line incoming branch, if the protection circuit breaker positions TWJ of C1 and C2 are both 1, the bus protection does not need to consider the line incoming voltage, and the bus protection voltage is judged to be blocked and opened.
2. The method of claim 1, wherein the incoming line branch circuit where the breaker switch is located has a flow determination condition that: and if the corresponding incoming line branch circuit still continues to have flow after the delay is set from the moment when the position information of the circuit breaker is acquired and the corresponding switch is located, judging that the incoming line branch circuit has flow.
3. The method according to claim 1, wherein the method further comprises: when judging the positions of the protective circuit breakers of C1 and C2, if the circuit breaker position information of the circuit breaker switch corresponds to the switch division position and the incoming line branch circuit where the circuit breaker switch is positioned continuously has flow in a set duration, judging that the corresponding circuit breaker switch is abnormal, and outputting an abnormal alarm signal.
4. The method of claim 1, wherein if the protective circuit breaker positions TWJ of C1 and C2 are both 0 and both incoming branches of C1 and C2 have flows, determining that the bus protection voltage is open when both incoming branches of C1 and C2 satisfy the protection voltage open determination condition.
5. In the hand-in-hand wiring mode, a bus is connected with a first incoming line branch and a second incoming line branch, a breaker switch C1 is arranged on the first incoming line branch, and a breaker switch C2 is arranged on the second incoming line branch;
The bus protection voltage judging device is characterized by comprising:
The data acquisition module is configured to acquire breaker position information of the breaker switches C1 and C2, current data of each incoming branch and voltage data of each incoming branch;
A protection circuit breaker position judging module configured to judge, for C1 and C2, protection circuit breaker positions of C1 and C2 according to corresponding circuit breaker position information and incoming line branch current data, respectively;
The bus protection voltage selection module is configured to determine the voltage of the incoming line branch circuit which should be selected for bus protection according to the positions of the circuit breakers for protection of C1 and C2 and the current data of each incoming line branch circuit;
The bus protection voltage judging module is configured to judge whether the line incoming branch voltage which is selected by bus protection meets the preset bus protection voltage locking opening condition based on the obtained line incoming branch voltage data, and judge that the bus protection voltage is locked and opened if the line incoming branch voltage which is selected by bus protection meets the preset bus protection voltage locking opening condition;
Wherein, the breaker trip protection state judging module judges the protection breaker position of C1 and C2, including:
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is located has current, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch on position;
If the breaker position information of the breaker switch corresponds to the switch closing position, judging that the protective breaker position TWJ of the breaker switch is 0 and corresponds to the switch closing position;
if the breaker position information of the breaker switch corresponds to the switch split position and the incoming line branch circuit where the breaker switch is positioned is not current, judging that the protective breaker position TWJ of the breaker switch is 1 and corresponds to the switch split position;
the bus protection voltage selecting module is used for determining the voltage of the incoming line branch circuit which should be selected by bus protection:
if the protective breaker positions TWJ of the C1 and the C2 are 0 and at least one incoming line branch circuit has current, taking the voltage of the current incoming line branch circuit as the bus protection voltage;
If the positions of the protective circuit breakers of C1 and C2 are different, taking the voltage of the incoming line branch circuit where the circuit breaker switch with the protective circuit breaker position TWJ of 0 is located as the bus protection voltage;
if the protective circuit breaker positions TWJ of C1 and C2 are both 1, the bus protection does not need to consider the incoming line voltage, and the bus protection voltage determination module determines that the bus protection voltage is blocked and opened.
6. A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the bus bar protection voltage determination method of the hand-held wiring method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571870.0A CN114389239B (en) | 2021-12-21 | 2021-12-21 | Bus protection voltage judging method and device of hand-in-hand wiring mode and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571870.0A CN114389239B (en) | 2021-12-21 | 2021-12-21 | Bus protection voltage judging method and device of hand-in-hand wiring mode and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114389239A CN114389239A (en) | 2022-04-22 |
| CN114389239B true CN114389239B (en) | 2024-04-26 |
Family
ID=81197361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111571870.0A Active CN114389239B (en) | 2021-12-21 | 2021-12-21 | Bus protection voltage judging method and device of hand-in-hand wiring mode and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114389239B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629983A (en) * | 2009-08-12 | 2010-01-20 | 国电南京自动化股份有限公司 | Judging method of double-bus bus-coupled running mode |
| EP2650996A1 (en) * | 2012-04-12 | 2013-10-16 | Hamilton Sundstrand Corporation | Overcurrent protection and fault isolation |
| CN106129971A (en) * | 2016-08-12 | 2016-11-16 | 许继集团有限公司 | A kind of busbar protective device chopper dual failure fault partition method and system |
| WO2017166735A1 (en) * | 2016-03-31 | 2017-10-05 | 国电南瑞科技股份有限公司 | Power-grid self-healing system and self-healing logic thereof in 110kv chain power-supply mode |
| CN109861179A (en) * | 2019-03-20 | 2019-06-07 | 南京国电南自电网自动化有限公司 | A kind of bus protection voltage-switching method suitable for powering mode of handing in hand |
| CN110514994A (en) * | 2019-09-04 | 2019-11-29 | 甘书宇 | A kind of high-voltage AC breaker is restriked the method for on-line monitoring |
| CN111900701A (en) * | 2020-08-05 | 2020-11-06 | 华自科技股份有限公司 | Isolation switch abnormity processing method and device, bus protection device and storage medium |
| CN113346481A (en) * | 2021-05-18 | 2021-09-03 | 国网河北省电力有限公司经济技术研究院 | Self-healing system and self-healing method for 110kV chain structure transformer substation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795802B (en) * | 2014-01-16 | 2018-07-10 | 西门子公司 | Protective device, system and method with communication bus fault diagnosis functions |
-
2021
- 2021-12-21 CN CN202111571870.0A patent/CN114389239B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629983A (en) * | 2009-08-12 | 2010-01-20 | 国电南京自动化股份有限公司 | Judging method of double-bus bus-coupled running mode |
| EP2650996A1 (en) * | 2012-04-12 | 2013-10-16 | Hamilton Sundstrand Corporation | Overcurrent protection and fault isolation |
| WO2017166735A1 (en) * | 2016-03-31 | 2017-10-05 | 国电南瑞科技股份有限公司 | Power-grid self-healing system and self-healing logic thereof in 110kv chain power-supply mode |
| CN106129971A (en) * | 2016-08-12 | 2016-11-16 | 许继集团有限公司 | A kind of busbar protective device chopper dual failure fault partition method and system |
| CN109861179A (en) * | 2019-03-20 | 2019-06-07 | 南京国电南自电网自动化有限公司 | A kind of bus protection voltage-switching method suitable for powering mode of handing in hand |
| CN110514994A (en) * | 2019-09-04 | 2019-11-29 | 甘书宇 | A kind of high-voltage AC breaker is restriked the method for on-line monitoring |
| CN111900701A (en) * | 2020-08-05 | 2020-11-06 | 华自科技股份有限公司 | Isolation switch abnormity processing method and device, bus protection device and storage medium |
| CN113346481A (en) * | 2021-05-18 | 2021-09-03 | 国网河北省电力有限公司经济技术研究院 | Self-healing system and self-healing method for 110kV chain structure transformer substation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114389239A (en) | 2022-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100039741A1 (en) | Electrical protection arrangement for an electrical distribution network | |
| Sidhu et al. | TCSC impact on communication-aided distance-protection schemes and its mitigation | |
| CN106711953B (en) | Photovoltaic inverter direct-current side short-circuit protection device and protection method | |
| EP2909908B1 (en) | Method of operate is-limiters in ring systems | |
| CN104617783A (en) | Improved structure of MMC (Modular Multilevel Converter) current converter with direct-current fault current-limiting capacity and isolating method | |
| Dijkhuizen et al. | Zoning in high voltage DC (HVDC) grids using hybrid DC breaker | |
| CN114977131B (en) | Series-parallel connection type flexible interconnection switch, power distribution system and fault protection method thereof | |
| JP5567624B2 (en) | Protection coordination system | |
| US5566082A (en) | Method of detecting a fault section of busbar | |
| CN114389239B (en) | Bus protection voltage judging method and device of hand-in-hand wiring mode and storage medium | |
| EP3258563B1 (en) | Protection device and protection system | |
| EP3783764A1 (en) | Integration of primary protection relays for electric power delivery systems | |
| JP4648789B2 (en) | Isolated operation prevention system | |
| Rahman et al. | Cyber vulnerabilities on agent-based smart grid protection system | |
| Jamali et al. | New approach to coordination of distance relay zone-2 with overcurrent protection using linear programming methods | |
| Apostolov et al. | An update to protection issues during system restoration | |
| JP7181760B2 (en) | Protection control device for AC/DC converter station, protection control system for DC power transmission system, and protection control method for AC/DC converter station | |
| Rosas-Ortiz et al. | High-speed backup scheme for zone 2 of non-pilot distance relays | |
| JP2020167774A (en) | Protection device | |
| CN114498582B (en) | T-zone protection method and system suitable for different installation positions of outgoing line isolating cutters | |
| Duong et al. | Bus protection a new and reliable approach | |
| RU2611059C2 (en) | Method of measurement for detecting fault of three-phase network | |
| JP2011182548A (en) | Bus protection system | |
| Kasztenny et al. | Digital low-impedance bus differential protection–Review of principles and approaches | |
| Munteanu et al. | Reliability model to estimate power quality and reliability of supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |