CN111585275A - Control method for intelligent loop opening and closing operation - Google Patents
Control method for intelligent loop opening and closing operation Download PDFInfo
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- CN111585275A CN111585275A CN202010403089.1A CN202010403089A CN111585275A CN 111585275 A CN111585275 A CN 111585275A CN 202010403089 A CN202010403089 A CN 202010403089A CN 111585275 A CN111585275 A CN 111585275A
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- loop
- opening
- closing
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
Abstract
The invention relates to the technical field of electric power, in particular to a control method for intelligent loop opening and closing operation, which comprises the following steps: receiving a scheduling load transfer instruction to select a preset mode of load transfer, selecting a system mode of load transfer according to acquired data information, and issuing a loop closing instruction of the closed-loop circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection; and carrying out logic analysis and judgment on the data information fed back by the loop closing circuit breaker, and determining whether the loop closing operation is successfully completed: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening breaker through the switching value output logic unit; and logically analyzing and judging the data information fed back by the loop opening circuit breaker, and determining whether the loop opening operation is successfully completed: and if the ring-opening operation is successful, completing the load transferring operation. The invention can rapidly complete the loop closing and loop releasing actions of the circuit breaker through logic judgment, thereby preventing the power failure problem during the adjustment of the operation mode.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a control method for intelligent loop opening and closing operation.
Background
At the current stage, when the operation mode of a main power supply line is converted into a standby power supply line for adjustment according to the transformer substation, the switching station, the ring website and the power distribution station, a power failure mode is adopted all the time, namely, the main power supply line is cut off, then the standby power supply line is connected, the power conversion is completed, the power supply quality of a user is seriously influenced, and the power failure of the user is caused.
With the construction of a higher-level voltage power grid, a lower-level voltage power grid is required to gradually realize partition operation, and adjacent partitions are kept mutually standby; when the operation of the power system constructed by the layered subareas is changed from standby to operation, if the power failure is adopted for supply, the production and the life of users are seriously influenced, particularly, the power system has serious influence on large users and special users with high power supply quality requirements, and meanwhile, the rapid adjustment under the accident condition is difficult to realize.
Disclosure of Invention
In order to solve the above problems, the present invention provides a control method for intelligent loop opening and closing operation.
A method of controlling intelligent opening and closing loop operation, comprising:
receiving a scheduling load transfer instruction to select a preset mode of load transfer, selecting a system mode of load transfer according to acquired data information, and issuing a loop closing instruction of the closed-loop circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection;
and carrying out logic analysis and judgment on the data information fed back by the loop closing circuit breaker, and determining whether the loop closing operation is successfully completed: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening breaker through the switching value output logic unit;
and logically analyzing and judging the data information fed back by the loop opening circuit breaker, and determining whether the loop opening operation is successfully completed: and if the ring-opening operation is successful, completing the load transferring operation.
Preferably, if the ring-opening operation fails, performing logic analysis and judgment of remedial measures:
when the remedial condition is met, a remedial measure instruction is issued, and the switching-to-load operation is completed when the position signal of the unoperated disconnecting circuit breaker is switched to be switched off.
Preferably, when the remedial condition is not satisfied, the recovery time interval judgment that the loop closing operation is successful and the loop opening operation is failed is performed:
and when the recovery time interval of the successful loop closing operation and the failed loop opening operation reaches a preset condition, waiting for manually operating the circuit breaker.
Preferably, when the recovery time interval during which the loop closing operation is successful and the loop opening operation is failed does not reach the preset condition, the data information is continuously monitored until the remediation condition is met.
Preferably, the logic analysis and judgment of the data information fed back by the closed-loop circuit breaker, for determining whether the closed-loop operation is successfully completed, includes:
when the data information fed back by the loop closing circuit breaker is consistent with the data information judged by the loop closing logic and the current of the loop closing incoming line is combined by the position signals of the loop closing circuit breaker and the loop closing incoming line from the absence of the current and the branching of the position signals of the loop closing circuit breaker, judging that the loop closing operation is successful;
and when the data information fed back by the loop closing circuit breaker is inconsistent with the data information judged by the loop closing logic, or the loop closing incoming line current still does not exist, or the position signal of the loop closing circuit breaker still is in the split position, judging that the loop closing operation fails.
Preferably, the logically analyzing and judging the data information fed back by the loop opening breaker to determine whether the loop opening operation is successfully completed includes:
when the data information fed back by the loop-opening circuit breaker is consistent with the data information judged by the loop-opening logic, the loop-opening incoming line current is divided into a current state from the current state to the current state, and the position signal of the loop-opening circuit breaker is divided into a time state from the current state to the current state, judging that the loop-opening operation is successful;
and when the data information fed back by the loop-opening circuit breaker is inconsistent with the data information judged by the logic, or the loop-opening incoming line current still exists or the position signal of the loop-opening circuit breaker still is in a closed position, judging that the loop-opening operation fails.
Preferably, the performing the remedial action logic analysis determination includes:
if the loop closing current is greater than the current splitting action fixed value and the loop closing time is greater than the current splitting time fixed value, judging that the remediation condition is met;
and if the loop closing current does not reach the current splitting action fixed value or the loop closing time is greater than the current splitting time fixed value, judging that the remediation condition is not met.
The invention has the beneficial effects that:
the invention effectively improves the reliability of system power supply and the quality of electric energy, and can effectively prevent the risk of misoperation caused by misoperation of operators on site; the device can be quickly repaired when primary equipment fails in the operation process, and the risk that a power grid fault causes power loss of a user in the operation process is effectively prevented.
According to the invention, the loop closing and loop opening actions of the circuit breaker are rapidly completed through logic judgment, the power failure problem during operation mode adjustment is prevented, the regional load balance is ensured, the power supply reliability and the power quality of the system are improved, the operation risk of operators is obviously reduced, and the safety of equipment and the stable operation of a power grid are ensured.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic flow chart of a method for controlling an intelligent loop opening and closing operation in accordance with one embodiment of the present invention;
fig. 2 is a logic flow diagram of a method for controlling an intelligent loop opening and closing operation according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The basic idea of the invention is to carry out logic analysis and judgment on the data information fed back by the closed-loop circuit breaker and carry out logic analysis and judgment on the data information fed back by the open-loop circuit breaker, thereby adjusting the operation mode of the power grid in a short time, completing the operation of load transfer, analyzing the currently issued command in the process of load transfer adjustment, judging whether the current power grid operation state is met, carrying out corresponding remedial measures on the faults of the power grid during the adjustment of the load transfer, monitoring the operated circuit breaker after the operation and ensuring that the time interval of the closed-loop main operation circuit breaker group is within a controllable range.
Based on the above thought, the present invention provides a control method for intelligent loop opening and closing operation, which is implemented by an intelligent loop opening and closing operation system, as shown in fig. 1, the method includes the following steps:
s1: receiving a scheduling load transfer instruction to select a preset mode of load transfer, selecting a system mode of load transfer according to acquired data information, and issuing a loop closing instruction of the closed-loop circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection;
s2: and carrying out logic analysis and judgment on the data information fed back by the loop closing circuit breaker, and determining whether the loop closing operation is successfully completed: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening breaker through the switching value output logic unit;
s3: and logically analyzing and judging the data information fed back by the loop opening circuit breaker, and determining whether the loop opening operation is successfully completed: if the ring-opening operation is successful, the load transferring operation is completed;
s4: if the ring-opening operation fails, performing remedial measure logic analysis and judgment: when the remedial condition is met, a remedial measure instruction is issued, and when the position signal of the unoperated ring-opening circuit breaker is switched from on to off, the load transfer operation is completed;
s5: when the remedial condition is not met, judging the recovery time interval of successful ring closing operation and failed ring opening operation: when the recovery time interval of successful ring closing operation and failed ring opening operation reaches a preset condition, waiting for manual operation of the circuit breaker;
s6: and when the recovery time interval of the successful ring closing operation and the failed ring opening operation does not reach the preset condition, continuously monitoring the data information until the remediation condition is met.
Wherein, the logic analysis and judgment of the data information fed back by the closed-loop circuit breaker is used for confirming whether the closed-loop operation is successfully completed or not, and comprises the following steps: when the data information fed back by the loop closing circuit breaker is consistent with the data information judged by the loop closing logic and the current of the loop closing incoming line is combined by the position signals of the loop closing circuit breaker and the loop closing incoming line from the absence of the current and the branching of the position signals of the loop closing circuit breaker, judging that the loop closing operation is successful; and when the data information fed back by the loop closing circuit breaker is inconsistent with the data information judged by the loop closing logic, or the loop closing incoming line current still does not exist, or the position signal of the loop closing circuit breaker still is in the split position, judging that the loop closing operation fails.
Wherein, the logic analysis and judgment of the data information fed back by the loop opening circuit breaker is used for confirming whether the loop opening operation is completed successfully or not, and comprises the following steps: when the data information fed back by the loop-opening circuit breaker is consistent with the data information judged by the loop-opening logic, the loop-opening incoming line current is divided into a current state from the current state to the current state, and the position signal of the loop-opening circuit breaker is divided into a time state from the current state to the current state, judging that the loop-opening operation is successful; and when the data information fed back by the loop-opening circuit breaker is inconsistent with the data information judged by the logic, or the loop-opening incoming line current still exists or the position signal of the loop-opening circuit breaker still is in a closed position, judging that the loop-opening operation fails.
Wherein the performing remedial action logic analysis determination comprises: if the loop closing current is greater than the current splitting action fixed value and the loop closing time is greater than the current splitting time fixed value, judging that the remediation condition is met; and if the loop closing current does not reach the current splitting action fixed value or the loop closing time is greater than the current splitting time fixed value, judging that the remediation condition is not met.
Specifically, a logic flow chart of the control method for intelligent loop opening and closing operation of the present invention is shown in fig. 2. The power company operating personnel receives the power company dispatching switching load instruction, then the switching load is selected through the preset mode of the intelligent switching loop operating system, the intelligent switching loop operating system is according to the collected data information, the intelligent switching loop operating system comprises two inlet wires and two bus single-phase voltages, a circuit breaker position signal and two inlet wire currents, the mode selection of the system is confirmed to be consistent with the mode selection preset by the operating personnel, the system is opened and the authority is issued, the operating personnel can not operate mistakenly, the operating personnel issues the operating instruction of the intelligent switching loop operating system, and after the operating instruction is issued, the intelligent switching loop operating system issues the switching loop circuit breaker instruction through the switching value output logic unit.
After the intelligent closing and opening loop operation system sends a circuit breaker closing loop instruction to complete, the logic analysis and judgment is carried out on data information fed back by the closing and opening loop circuit breaker, including closing and opening loop circuit current and closing loop circuit breaker position nodes, and the data information is used for confirming whether the closing and opening loop operation is completed successfully or not.
After the intelligent loop opening and closing operation system confirms that the operation is successful, namely the data information fed back by the loop closing circuit breaker is consistent with the data information judged by the loop closing logic, the loop closing incoming line current is switched to be closed by the position signals of the loop closing circuit breaker without current, and the intelligent loop opening and closing operation system issues a loop opening instruction of the loop opening circuit breaker through the switching value output logic unit.
If the intelligent closing and opening loop operation system confirms that the closing and opening loop operation fails, namely the data information fed back by the closing and opening loop circuit breaker is inconsistent with the data information judged by the closing and opening loop logic, the current of the closing and opening loop incoming line is still not available, the position signal of the closing and opening loop circuit breaker is still in the split position, the operation mode of the power grid is not changed, and the intelligent closing and opening loop operation system returns.
After the circuit breaker ring-opening instruction is sent by the intelligent ring-opening and closing operation system, the data information fed back by the ring-opening circuit breaker is consistent with the ring-opening logic judgment data information, and the data information fed back by the ring-opening circuit breaker is logically analyzed and judged to confirm whether the ring-opening instruction is correctly completed or not.
After the intelligent loop opening and closing operation system confirms that the loop opening operation is successful, namely, the data information fed back by the loop opening circuit breaker is consistent with the data information judged by the loop opening logic, the loop opening incoming line current is switched to the loop opening circuit breaker by the presence or absence of the loop opening circuit breaker position signal, and the intelligent loop opening and closing operation system returns to complete the load transferring operation.
If the intelligent loop opening and closing operation system confirms that the loop opening operation fails, namely the data information fed back by the loop opening and closing circuit breaker is inconsistent with the data information judged by the logic, the loop opening and closing incoming line current still exists, the position signal of the loop opening and closing circuit breaker still is in a closed position, and the intelligent loop opening and closing system carries out remedial measure logic analysis and judgment.
If the intelligent loop opening and closing operation system confirms that the loop opening operation fails, namely the data information fed back by the loop opening and closing circuit breaker is inconsistent with the data information judged by the logic, the intelligent loop opening and closing system carries out remedial measure logic analysis and judgment, the remedial condition is met, namely the circuit breaker feedback data information reaches the remedial measure logic judgment condition, the loop closing current is greater than the current splitting action fixed value, and the loop closing time is greater than the current splitting time fixed value, the intelligent loop opening and closing operation system sends a remedial measure instruction, after the confirmation instruction is completed, namely the circuit breaker position signal which does not act is switched on and off, and the intelligent loop opening and closing system returns.
If the intelligent loop opening and closing operation system confirms that the loop opening operation fails, namely the data information fed back by the loop opening and closing circuit breaker is inconsistent with the data information judged by the logic, the intelligent loop opening and closing system carries out remedial measure logic analysis and judgment, the remedial condition is not met, namely the circuit breaker feedback data information reaches the remedial measure logic judgment condition, the loop closing current does not reach the current splitting action fixed value or the loop closing time is greater than the current splitting time fixed value, and the intelligent loop opening and closing operation system carries out recovery time interval judgment of the loop opening success and the loop opening failure.
After the intelligent loop opening and closing operation system confirms that the loop opening operation fails, namely, data information fed back by the loop opening and closing circuit breaker is inconsistent with data information judged by the logic, the intelligent loop opening and closing system carries out remedial measure logic analysis and judgment, remedial conditions are not met, namely, the circuit breaker feedback data information reaches the remedial measure logic judgment conditions, loop closing current does not reach a current splitting action fixed value or loop closing time is greater than a current splitting time fixed value, the intelligent loop opening and closing operation system judges recovery time intervals of loop closing success and loop opening failure to reach preset conditions, the recovery time interval fixed value of loop closing success and loop opening failure reaches, the intelligent loop opening and closing operation system returns to wait for manually operating the circuit breaker.
After the intelligent loop opening and closing operation system confirms that the loop opening operation fails, namely, the data information fed back by the loop opening and closing circuit breaker is inconsistent with the data information judged by the logic, the intelligent loop opening and closing system carries out remedial measure logic analysis and judgment, the remedial condition is not met, namely, the circuit breaker feedback data information reaches the remedial measure logic judgment condition, the loop closing current does not reach the current splitting action fixed value or the loop closing time is greater than the current splitting time fixed value, the recovery time interval judgment of the loop closing success and loop opening failure of the intelligent loop opening and closing operation system does not reach the preset condition, the recovery time interval fixed value of the loop closing success and loop opening failure does not reach, the intelligent loop opening and closing operation system continuously monitors the data information, and the remedial measure judgment is carried out on the operation.
The invention effectively improves the reliability of system power supply and the quality of electric energy, and can effectively prevent the risk of misoperation caused by misoperation of operators on site; the device can be quickly repaired when primary equipment fails in the operation process, and the risk that a power grid fault causes power loss of a user in the operation process is effectively prevented.
According to the invention, the loop closing and loop opening actions of the circuit breaker are rapidly completed through logic judgment, the power failure problem during operation mode adjustment is prevented, the regional load balance is ensured, the power supply reliability and the power quality of the system are improved, the operation risk of operators is obviously reduced, and the safety of equipment and the stable operation of a power grid are ensured.
Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. A control method for intelligent ring opening and closing operation is characterized by comprising the following steps:
receiving a scheduling load transfer instruction to select a preset mode of load transfer, selecting a system mode of load transfer according to acquired data information, and issuing a loop closing instruction of the closed-loop circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection;
and carrying out logic analysis and judgment on the data information fed back by the loop closing circuit breaker, and determining whether the loop closing operation is successfully completed: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening breaker through the switching value output logic unit;
and logically analyzing and judging the data information fed back by the loop opening circuit breaker, and determining whether the loop opening operation is successfully completed: and if the ring-opening operation is successful, completing the load transferring operation.
2. The method for controlling an intelligent opening/closing loop operation according to claim 1,
if the ring-opening operation fails, performing remedial measure logic analysis and judgment:
when the remedial condition is met, a remedial measure instruction is issued, and the switching-to-load operation is completed when the position signal of the unoperated disconnecting circuit breaker is switched to be switched off.
3. The method for controlling an intelligent opening/closing loop operation according to claim 2,
when the remedial condition is not met, judging the recovery time interval of successful ring closing operation and failed ring opening operation:
and when the recovery time interval of the successful loop closing operation and the failed loop opening operation reaches a preset condition, waiting for manually operating the circuit breaker.
4. The method for controlling an intelligent opening/closing loop operation according to claim 3,
and when the recovery time interval of the successful ring closing operation and the failed ring opening operation does not reach the preset condition, continuously monitoring the data information until the remediation condition is met.
5. The method as claimed in claim 1, wherein the performing logic analysis and judgment on the data information fed back by the loop closing circuit breaker for determining whether the loop closing operation is successfully completed comprises:
when the data information fed back by the loop closing circuit breaker is consistent with the data information judged by the loop closing logic and the current of the loop closing incoming line is combined by the position signals of the loop closing circuit breaker and the loop closing incoming line from the absence of the current and the branching of the position signals of the loop closing circuit breaker, judging that the loop closing operation is successful;
and when the data information fed back by the loop closing circuit breaker is inconsistent with the data information judged by the loop closing logic, or the loop closing incoming line current still does not exist, or the position signal of the loop closing circuit breaker still is in the split position, judging that the loop closing operation fails.
6. The method as claimed in claim 1, wherein the performing logic analysis and judgment on the data information fed back by the loop opening breaker for determining whether the loop opening operation is successfully completed comprises:
when the data information fed back by the loop-opening circuit breaker is consistent with the data information judged by the loop-opening logic, the loop-opening incoming line current is divided into a current state from the current state to the current state, and the position signal of the loop-opening circuit breaker is divided into a time state from the current state to the current state, judging that the loop-opening operation is successful;
and when the data information fed back by the loop-opening circuit breaker is inconsistent with the data information judged by the logic, or the loop-opening incoming line current still exists or the position signal of the loop-opening circuit breaker still is in a closed position, judging that the loop-opening operation fails.
7. The method as claimed in claim 2, wherein the performing a remedial action logic analysis determination comprises:
if the loop closing current is greater than the current splitting action fixed value and the loop closing time is greater than the current splitting time fixed value, judging that the remediation condition is met;
and if the loop closing current does not reach the current splitting action fixed value or the loop closing time is greater than the current splitting time fixed value, judging that the remediation condition is not met.
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| CN112636471A (en) * | 2020-12-11 | 2021-04-09 | 国网安徽省电力有限公司黄山供电公司 | Method for judging abnormal ring opening in 10KV distribution network ring closing process |
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| CN111585275B (en) | 2023-08-22 |
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