CN114389239A - Bus protection voltage determination method and device in hand-in-hand wiring mode and storage medium - Google Patents
Bus protection voltage determination method and device in hand-in-hand wiring mode and storage medium Download PDFInfo
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- CN114389239A CN114389239A CN202111571870.0A CN202111571870A CN114389239A CN 114389239 A CN114389239 A CN 114389239A CN 202111571870 A CN202111571870 A CN 202111571870A CN 114389239 A CN114389239 A CN 114389239A
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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
- 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
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Abstract
The invention discloses a method, a device and a storage medium for judging bus protection voltage in a hand-in-hand wiring mode, wherein the method comprises the following steps: acquiring breaker position information, incoming branch current data and incoming branch voltage data of breaker switches C1 and C2 on the two incoming branches; judging the positions of the protective circuit breakers of C1 and C2 according to the corresponding circuit breaker position information and the incoming branch current data; according to the positions of the protective circuit breakers of C1 and C2 and current data of all incoming line branches, determining incoming line branch voltage which should be selected for bus protection; and judging whether the voltage of the incoming line branch which should be selected by the bus protection meets the preset bus protection voltage locking condition or not based on the acquired voltage data of the incoming line branch, if so, judging that the bus protection voltage locking is open, and if a fault occurs in a bus area, allowing the corresponding bus protection action. The bus protection voltage switching selection logic is optimized, and the reliability of bus voltage protection can be improved.
Description
Technical Field
The invention relates to the technical field of power system protection control, in particular to a method and a device for judging bus protection voltage 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 ensuring the national economy and social development, and the requirement on the stability of the power system is more and more prominent along with the continuous high-speed development of the economy.
A typical manual wiring power supply mode is shown in fig. 1 of the specification, wherein C, D, E substations in the drawings are also called chain-structured series-supply substations, and taking a C station as an example, a series-supply loop composed of C1, C2 and C3 is shown in fig. 2, a set of bus protection device needs to be configured, a main wiring form is a single bus, and a single-bus main wiring bus protection device needs to be configured for C4, C5 and C6.
Because a bus PT is not generally configured on a high-voltage side bus in a hand-in-hand power supply mode, bus protection needs to acquire the voltage of the PT on a line inlet side for logic judgment, and the accuracy of the voltage directly influences whether the whole bus protection can correctly act when a system fails, it is necessary to research and improve a bus protection voltage switching method suitable for a hand-in-hand wiring mode.
Moreover, in the operation of an actual system, there may be an abnormal condition that the positions of the two incoming lines C1 and C2 are double-open or double-close, and meanwhile, for some extreme conditions, such as the switch positions of the two incoming lines are actually open and close, respectively, and the situation that the respective positions do not correspond occurs at the same time, how to select the bus protection voltage at this time, the prior art does not provide a reliable and effective solution.
Disclosure of Invention
The invention aims to provide a method, a device and a storage medium for judging the bus protection voltage in a hand-in-hand wiring mode, which optimize the selection logic of bus protection voltage switching and improve the reliability of bus voltage protection. The technical scheme adopted by the invention is as follows.
On one hand, the invention provides a method for judging the bus protection voltage in a hand-in-hand wiring mode, wherein in the hand-in-hand wiring mode, 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 protection judgment method comprises the following steps:
acquiring breaker position information of breaker switches C1 and C2, current data of each incoming line branch and voltage data of each incoming line branch;
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 branch current data respectively;
according to the positions of the protective circuit breakers of C1 and C2 and current data of all incoming line branches, determining incoming line branch voltage which should be selected for bus protection;
and judging whether the voltage of the incoming line branch which should be selected by the bus protection meets the preset locking and unlocking condition of the bus protection voltage or not based on the acquired voltage data of the incoming line branch, and if so, judging that the locking and unlocking of the bus protection voltage is opened.
The bus voltage locking and unlocking is one of the necessary conditions for the bus protection action, and under the condition of the bus voltage locking and unlocking, if a fault occurs in a bus area, the bus protection action is allowed to remove the fault.
Optionally, the determining the positions of the protective breakers C1 and C2 includes:
if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has current, judging that the protection 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 on position, judging that the protection breaker position TWJ of the breaker switch is 0 and corresponds to the switch on position;
and if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has no current, judging that the protection breaker position TWJ of the breaker switch is 1 and corresponds to the switch separation position.
Optionally, the condition for judging whether the incoming line branch where the breaker switch is located has a current is as follows: if the corresponding inlet branch circuit still continues to have flow after the set time delay from the moment when the breaker position information corresponding to the switch is obtained, the inlet branch circuit is judged to have flow. The delay judgment mode can prevent the line flowing caused by short-time CT abnormity, and realize more accurate judgment of the incoming line branch circuit state.
Optionally, the method further comprises: when the positions of the protective circuit breakers of C1 and C2 are judged, if the circuit breaker position information of the circuit breaker switch corresponds to the switch separation position, and the inlet line branch circuit where the circuit breaker switch is located continuously has current within a set time length, the corresponding circuit breaker switch is judged to be abnormal, and an abnormal alarm signal is output.
Optionally, the determining the incoming branch voltage for bus protection according to the positions of the protective breakers of C1 and C2 and the current data of each incoming branch includes:
if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0, and the incoming line branch circuit of C1 has no current, selecting the voltage of the incoming line branch circuit of C2 as the voltage for protecting the bus;
if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0, and the incoming line branch circuit of C2 has no current, selecting the voltage of the incoming line branch circuit of C1 as the voltage for protecting the bus;
if the positions TWJ of the protective breakers of C1 and C2 are both 0, and the incoming lines of C1 and C2 all have current, the voltages of the two incoming lines of C1 and C2 are selected as the bus protection voltage.
In the above-described scheme, if the protection breaker positions TWJ of C1 and C2 are both 0 and only one incoming line branch has no current, the voltage of the current incoming line branch is used as the bus protection voltage.
Optionally, if the positions TWJ of the protective breakers of C1 and C2 are both 0, and the incoming line branches of C1 and C2 both have a current, it is determined that the bus protection voltage is locked and unlocked when both the incoming line branches of C1 and C2 meet the protection voltage locking and unlocking determination condition.
In the above scheme, that is, if the positions TWJ of the protective breakers of C1 and C2 are both 0, and at least one incoming line branch has a current, the voltage of the incoming line branch having the current is used as the bus protection voltage.
Optionally, the determining, according to the positions of the protective breakers of C1 and C2 and the current data of each incoming line branch, the incoming line branch voltage that should be selected for the bus protection further includes:
if the positions of the protective breakers of C1 and C2 are different, the voltage of the incoming line branch where the breaker switch with the protective breaker position TWJ of 0 is located is used as the bus protection voltage.
Optionally, when the incoming line branch voltage that the bus protection should select is determined according to the positions of the protection circuit breakers of C1 and C2 and the current data of each incoming line branch, 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 incoming line voltage, at this time, it can be directly determined that the bus protection voltage is closed and opened, and when a fault occurs in the bus area, a corresponding bus protection action is allowed.
In the hand-in-hand wiring mode, a bus is connected with a first inlet branch and a second inlet branch, a circuit breaker switch C1 is arranged on the first inlet branch, and a circuit breaker switch C2 is arranged on the second inlet branch;
the bus protection voltage determination device includes:
the data acquisition module is configured to acquire breaker position information of breaker switches C1 and C2, current data of each incoming branch circuit, and voltage data of each incoming branch circuit;
the protection circuit breaker position judging module is configured for judging the protection circuit breaker positions of C1 and C2 according to the corresponding circuit breaker position information and the incoming branch current data of C1 and C2 respectively;
the bus protection voltage selection module is configured to determine incoming line branch voltage which should be selected by bus protection according to the positions of the protective circuit breakers of C1 and C2 and current data of all incoming line branches;
and the bus protection voltage judging module is configured to judge whether the incoming line branch voltage which should be selected by the bus protection meets a preset bus protection voltage locking and opening condition or not based on the acquired incoming line branch voltage data, and if so, judge that the bus protection voltage is locked and opened.
Optionally, the protection circuit breaker position determining module determines the positions of the protection circuit breakers C1 and C2, including:
if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has current, judging that the position TWJ of the breaker for protection 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 on position, judging that the protection breaker position TWJ of the breaker switch is 0 and corresponds to the switch on position;
and if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has no current, judging that the protection breaker position TWJ of the breaker switch is 1 and corresponds to the switch separation position.
Optionally, when the bus protection voltage selection module determines the incoming line branch voltage that the bus protection should select:
if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0 and at least one incoming line branch has current, the voltage of the incoming line branch with the current is used as the voltage for protecting the bus;
if the positions of the protective circuit breakers of C1 and C2 are different, taking the voltage of the incoming line branch where the circuit breaker switch with the position TWJ of the protective circuit breaker being 0 is located as the voltage for protecting the bus;
if the positions TWJ of the protective breakers of C1 and C2 are both 1, the incoming line voltage does not need to be considered for bus protection, and the bus protection voltage determination module determines that the bus protection voltage is closed or opened.
In a third aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for determining a bus protection voltage in a hand-in-hand wiring manner according to the first aspect.
Advantageous effects
According to the bus protection voltage judging method of the hand-in-hand wiring mode, firstly, the initial judgment of the TWJ theoretical value of the breaker switch protection and the operation condition of the incoming line branch is carried out according to the external TWJ state and the branch current condition of the breaker switch, then the incoming line branch voltage which is required to be selected for bus protection is selected according to the initial judgment result, and then the judgment of the locking protection state of the bus protection voltage is carried out according to the selected incoming line branch voltage, so that the bus protection voltage judging logic under the combined working condition of various protection TWJ and direct current is perfected, the common working condition and various extreme working conditions of the hand-in-hand wiring mode can be coped with, the efficient switching of the bus protection voltage is realized, the reliable operation of the bus protection is ensured, the safety and the stability of the operation of a power grid are improved, the power supply quality can be effectively improved, and the operation efficiency of the power grid is improved.
Drawings
FIG. 1 is a schematic diagram of a typical system power supply mode of a hand-in-hand wiring system;
fig. 2 is a schematic flow chart illustrating a bus protection determining method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the TWJ validation logic for C1 protection;
FIG. 4 is a schematic diagram of the TWJ validation logic for C2 protection;
FIG. 5 is a schematic diagram of the C1, C2 double-bit voltage switching logic;
FIG. 6 is a schematic diagram of the C1 on-bit and C2 off-bit voltage switching logic;
FIG. 7 is a schematic diagram of the C1 divide-by-bit, C2 close-by voltage switching logic;
FIG. 8 is a schematic diagram of the C1, C2 binary voltage switching logic;
FIG. 9 is a schematic diagram of an in-zone fault of a manual connection mode under a special working condition.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and the specific embodiments.
Example 1
This embodiment introduces a method for determining a bus protection voltage in a hand-in-hand connection mode.
Referring to a main wiring diagram of a hand-in-hand 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 respectively, taking a 110kV station C as an example, referring to fig. 9 again, a circuit 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 circuit 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 protection voltage determination method of the present embodiment includes:
acquiring breaker position information of 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 breakers of C1 and C2, which are abbreviated as protective TWJ of C1 and C2 herein, according to the corresponding breaker position information and the incoming branch current data;
according to the positions of the protective circuit breakers, namely the protective TWJ, of the C1 and the C2 and current data of all incoming line branches, the voltage of the incoming line branch which is required to be selected for bus protection is determined;
and judging whether the voltage of the incoming line branch which is required to be selected by the bus protection meets the preset bus voltage locking and opening condition or not based on the acquired voltage data of the incoming line branch, and if so, judging that the bus voltage locking and opening are realized. And under the condition that the bus voltage is locked and opened, if a fault occurs in the bus area, allowing corresponding bus protection action to remove the fault.
The following describes the process of determining the bus protection in this embodiment.
Determination of protective TWJ for one, C1 and C2
Referring to fig. 3 and 4, in this embodiment, the breaker positions for protection, i.e., the TWJ for protection, of the breaker switches C1 and C2 are determined according to the current conditions of the external TWJ and the branch where the switch is located, and the breaker position information that needs to be acquired by the method is derived from the external TWJ. The determination process of the TWJ for protection is specifically as follows:
referring to fig. 3, when the TWJ cut of the C1 is 1 and the incoming line branch of the C1 has no flow, it is determined that the TWJ for protection of C1 is 1. If the external TWJ of C1 is opened to 1 and the incoming branch at C1 is delayed to determine that there is continuous flow, it is assumed that C1 is theoretically closed and the TWJ for protection of C1 is 0. At the same time, the occurrence of position inconsistency of the C1 can be judged, and a C1 position abnormity warning signal can be output. If the external TWJ entry of C1 is 0, the protective TWJ of C1 is 0.
The confirmation logic of the TWJ for protection of C2 is similar to that of C1, and as shown in fig. 4, when the external TWJ of C2 is opened to 1 and the incoming line branch of C2 has no flow, it is determined that the TWJ for protection of C2 is 1. If the external TWJ of C2 is opened to 1 and the incoming branch at C2 is delayed to determine that there is continuous flow, it is assumed that C2 is theoretically closed and the TWJ for protection of C2 is 0. At the same time, the occurrence of position inconsistency of the C2 can be judged, and a C2 position abnormity warning signal can be output. If the external TWJ entry of C2 is 0, the protective TWJ of C2 is 0.
The fact that the incoming line branch continues flowing after being judged by the time delay means that the incoming line branch still continues flowing after the time delay is set from the moment when the external TWJ of the breaker switch is obtained to be 1. The delay judgment mode can prevent the line flowing caused by short-time CT abnormity, and realize more accurate judgment of the incoming line branch circuit state.
Second, bus protection voltage selection switching
In the embodiment, various working condition combinations of a hand-in-hand wiring mode are comprehensively considered, and the following bus protection voltage selection switching and bus protection voltage judgment logics are designed.
(1) Referring to fig. 5, if the protection breaker positions TWJ of C1 and C2 are both TWJ =0, and at least one incoming line branch has a current, the voltage of the incoming line branch having the current is used as the bus protection voltage:
if the TWJ for protection of the C1 and the C2 is 0, and the incoming line branch circuit where the C1 is located has no current, the voltage of the incoming line branch circuit where the C2 is located is selected as the voltage for bus protection, the voltage of the incoming line branch circuit where the C2 is located is open, the bus voltage is closed and open, and when a fault occurs in a bus area, corresponding bus protection action is allowed;
if the TWJ for protection of the C1 and the C2 is 0, and the incoming line branch circuit where the C2 is located has no current, the voltage of the incoming line branch circuit where the C1 is located is selected as the voltage for bus protection, the voltage of the incoming line branch circuit where the C1 is located is open, the bus voltage is closed and open, and when a fault occurs in a bus area, corresponding bus protection action is allowed;
if the TWJ of the protective circuit breakers of C1 and C2 are both TWJ =0, and the incoming line branches of C1 and C2 all have current, the incoming line branch voltages of C1 and C2 are selected to be the bus protection voltage, if both the incoming line branches are open, the bus voltage is closed and open, and when a fault occurs in the bus area, the corresponding bus protection action is allowed.
(2) 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 of TWJ =0 is used as the bus protection voltage:
referring to fig. 6, if the TWJ =0 for protection of C1 and the TWJ =1 for protection of C2, the voltage of the incoming line branch at which C1 is located is selected as the voltage for bus protection, and when the voltage of the incoming line branch at which C1 is located is open, the bus voltage is closed and open, and when a fault occurs in the bus area, the corresponding bus protection operation is allowed;
referring to fig. 7, if the TWJ =1 for protection of C1 and the TWJ =0 for protection of C2, the voltage of the incoming line branch at C2 is selected as the voltage for bus protection, and when the voltage of the incoming line branch at C2 is open, the bus voltage is closed and open, and when a fault occurs in the bus area, the corresponding bus protection operation is allowed.
(3) Referring to fig. 8, if the positions of the protection breakers of C1 and C2 are both TWJ =1, the incoming line voltage does not need to be considered for bus protection, and if the protection TWJ of C1 and C2 does not change after the time delay is set for a long time, it is determined that the bus voltage is closed and opened, and when a fault occurs in the bus area, a 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 deal with various working conditions of a hand-in-hand wiring mode, including extreme working conditions. As shown in fig. 9, in the extreme operating condition, the actual positions of the breaker switches C1 and C2 of 2 incoming branches are one-in-one, and the position non-correspondence occurs:
the incoming branches of C1 and C2 have no current, and the voltages of the incoming branches of C1 and C2 are not opened;
the switch positions of the C1 are not consistent, and the external TWJ is turned on to be 0, at this time, the method of this embodiment determines that the TWJ for protection of the C1 is 0, but the actual C1 switch is in a split position;
the switch positions of C2 are not consistent, the external TWJ is opened to 1, and there is no current in the incoming line branch, and at this time, the method of this embodiment will determine that the TWJ for protection of C2 is 1, but the actual C2 switch is closed.
According to the voltage switching logic shown in fig. 6, if TWJ =0 of C1 and TWJ =1 of C2, the incoming line branch voltage of C1 is selected as the bus protection voltage, and if the C1 voltage is not open, the bus voltage is not open. If a fault occurs in the bus area at this time, the actual fault current flows through C2, and C2 is divided but flows for a long time, and it is determined that C2 is actually in the on position with reference 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 the incoming line branch of C2 has current, the voltage of the incoming line branch of C2 is selected as the voltage for bus protection, and at this time, if the voltage of the incoming line branch of C2 is open, the bus voltage is closed and open, allowing the bus protection to remove the bus fault.
The above application examples show that the bus protection voltage switching logic and the corresponding bus protection voltage determination method of the embodiment can effectively cope with extreme working conditions of a hand-in-hand wiring mode, and realize reliable operation of bus protection.
Example 2
Based on the same inventive concept as embodiment 1, this embodiment introduces a bus protection voltage determination device in a hand-in-hand wiring manner, which includes:
the data acquisition module is configured to acquire breaker position information of breaker switches C1 and C2, current data of each incoming branch circuit, and voltage data of each incoming branch circuit;
the protection circuit breaker position judging module is configured for judging the protection circuit breaker positions of C1 and C2 according to the corresponding circuit breaker position information and the incoming branch current data of C1 and C2 respectively;
the bus protection voltage selection module is configured to determine incoming line branch voltage which should be selected by bus protection according to the positions of the protective circuit breakers of C1 and C2 and current data of all incoming line branches;
and the bus protection voltage judging module is configured to judge whether the incoming line branch voltage which should be selected by the bus protection meets a bus voltage protection fixed value or not based on the acquired incoming line branch voltage data, and if so, judge that the bus voltage is open and need to start corresponding bus protection action.
The specific functional implementation of each module above refers to the relevant contents in the method of embodiment 1, and the following contents are specifically introduced.
The protective breaker position judging module judges the protective breaker positions of C1 and C2, and comprises the following steps:
if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch where the breaker switch is located has no current, judging that the breaker position TWJ =1 for protection of the breaker switch corresponds to the switch separation position;
and if the breaker position information of the breaker switch corresponds to the switch on position, judging that the breaker position TWJ =0 for protection of the breaker switch corresponds to the switch on position.
When the bus protection voltage selection module determines the voltage of the incoming line branch which should be selected by the bus protection:
if the positions of the protective circuit breakers of C1 and C2 are both TWJ =0, and at least one incoming line branch has current, the voltage of the incoming line branch with the current is used as the voltage for bus protection;
if the positions of the protective circuit breakers of C1 and C2 are different, the voltage of the incoming line branch where the circuit breaker switch with the position of the protective circuit breaker TWJ =0 is located is used as the voltage for protecting the bus;
if the positions of the protective circuit breakers of C1 and C2 are both TWJ =1, the incoming line voltage does not need to be considered in bus protection, the bus protection voltage judgment module judges that the bus voltage is closed and opened, and corresponding bus protection action is allowed when a fault occurs in a bus area.
Example 3
This embodiment describes a computer-readable storage medium, on which a computer program is stored, where the computer program, when being executed by a processor, implements the method for determining bus protection in a manual connection manner as described in embodiment 1.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A bus protection voltage judging method of a hand-in-hand wiring mode is characterized in that in the hand-in-hand wiring mode, a bus is connected with a first inlet branch circuit and a second inlet branch circuit, a circuit breaker switch C1 is arranged on the first inlet branch circuit, and a circuit breaker switch C2 is arranged on the second inlet branch circuit;
the bus protection voltage judging method is characterized by comprising the following steps:
acquiring breaker position information of breaker switches C1 and C2, current data of each incoming line branch and voltage data of each incoming line branch;
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 branch current data respectively;
according to the positions of the protective circuit breakers of C1 and C2 and current data of all incoming line branches, determining incoming line branch voltage which should be selected for bus protection;
and judging whether the voltage of the incoming line branch which should be selected by the bus protection meets the preset locking and unlocking condition of the bus protection voltage or not based on the acquired voltage data of the incoming line branch, and if so, judging that the locking and unlocking of the bus protection voltage is opened.
2. The method as claimed in claim 1, wherein the judging the positions of the protective breakers of C1 and C2 comprises:
if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has current, judging that the protection 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 on position, judging that the protection breaker position TWJ of the breaker switch is 0 and corresponds to the switch on position;
and if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has no current, judging that the protection breaker position TWJ of the breaker switch is 1 and corresponds to the switch separation position.
3. The method as claimed in claim 2, wherein the condition for determining the current flowing in the incoming branch of the circuit breaker switch is: if the corresponding inlet branch circuit still continues to have flow after the set time delay from the moment when the breaker position information corresponding to the switch is obtained, the inlet branch circuit is judged to have flow.
4. The method according to claim 1 or 2, characterized in that the method further comprises: when the positions of the protective circuit breakers of C1 and C2 are judged, if the circuit breaker position information of the circuit breaker switch corresponds to the switch separation position, and the inlet line branch circuit where the circuit breaker switch is located continuously has current within a set time length, the corresponding circuit breaker switch is judged to be abnormal, and an abnormal alarm signal is output.
5. The method as claimed in claim 2, wherein the determining the incoming branch voltage that the bus protection should select according to the protection breaker positions of C1 and C2 and the incoming branch current data comprises:
if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0, and the incoming line branch circuit of C1 has no current, selecting the voltage of the incoming line branch circuit of C2 as the voltage for protecting the bus;
if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0, and the incoming line branch circuit of C2 has no current, selecting the voltage of the incoming line branch circuit of C1 as the voltage for protecting the bus;
if the positions TWJ of the protective breakers of C1 and C2 are both 0, and the incoming lines of C1 and C2 all have current, the voltages of the two incoming lines of C1 and C2 are selected as the bus protection voltage.
6. The method as claimed in claim 5, wherein if the protection breaker positions TWJ of C1 and C2 are both 0 and the incoming branches of C1 and C2 both have current, the bus protection voltage latch is determined to be open when the protection voltage latch open determination conditions are met for both incoming branches of C1 and C2.
7. The method as claimed in claim 2, wherein the step of determining the incoming branch voltage to be selected for the bus protection according to the protection breaker positions of C1 and C2 and the incoming branch current data further comprises:
if the positions of the protective breakers of C1 and C2 are different, the voltage of the incoming line branch where the breaker switch with the protective breaker position TWJ of 0 is located is used as the bus protection voltage.
8. The method as claimed in claim 2, wherein when the incoming branch voltage that should be selected for the bus protection is determined according to the protection breaker positions of C1 and C2 and the incoming branch current data, if the protection breaker positions TWJ of C1 and C2 are both 1, the bus protection does not need to consider the incoming voltage, and it is determined that the bus protection voltage is locked and unlocked.
9. A bus protection voltage judging device of a hand-in-hand wiring mode is characterized in that in the hand-in-hand wiring mode, a bus is connected with a first inlet branch circuit and a second inlet branch circuit, a circuit breaker switch C1 is arranged on the first inlet branch circuit, and a circuit breaker switch C2 is arranged on the second inlet branch circuit;
the bus protection voltage determination device is characterized by comprising:
the data acquisition module is configured to acquire breaker position information of breaker switches C1 and C2, current data of each incoming branch circuit, and voltage data of each incoming branch circuit;
the protection circuit breaker position judging module is configured for judging the protection circuit breaker positions of C1 and C2 according to the corresponding circuit breaker position information and the incoming branch current data of C1 and C2 respectively;
the bus protection voltage selection module is configured to determine incoming line branch voltage which should be selected by bus protection according to the positions of the protective circuit breakers of C1 and C2 and current data of all incoming line branches;
and the bus protection voltage judging module is configured to judge whether the incoming line branch voltage which should be selected by the bus protection meets a preset bus protection voltage locking and opening condition or not based on the acquired incoming line branch voltage data, and if so, judge that the bus protection voltage is locked and opened.
10. The device for determining the bus voltage in the hand-in-hand wiring manner according to claim 9, wherein the circuit breaker trip protection state determining module determines the positions of the protective circuit breakers of C1 and C2, and comprises:
if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has current, judging that the position TWJ of the breaker for protection 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 on position, judging that the protection breaker position TWJ of the breaker switch is 0 and corresponds to the switch on position;
and if the breaker position information of the breaker switch corresponds to the switch separation position and the incoming line branch circuit where the breaker switch is located has no current, judging that the protection breaker position TWJ of the breaker switch is 1 and corresponds to the switch separation position.
11. The device for determining bus protection voltage according to claim 10, wherein the bus protection voltage selection module, when determining the incoming line branch voltage that the bus protection should select:
if the positions TWJ of the protective circuit breakers of C1 and C2 are both 0 and at least one incoming line branch has current, the voltage of the incoming line branch with the current is used as the voltage for protecting the bus;
if the positions of the protective circuit breakers of C1 and C2 are different, taking the voltage of the incoming line branch where the circuit breaker switch with the position TWJ of the protective circuit breaker being 0 is located as the voltage for protecting the bus;
if the positions TWJ of the protective breakers of C1 and C2 are both 1, the incoming line voltage does not need to be considered for bus protection, and the bus protection voltage determination module determines that the bus protection voltage is closed or opened.
12. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method for determining a bus bar protection voltage according to any one of claims 1 to 8.
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