CN111585275B - Control method for intelligent ring opening and closing operation - Google Patents
Control method for intelligent ring opening and closing operation Download PDFInfo
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- CN111585275B CN111585275B CN202010403089.1A CN202010403089A CN111585275B CN 111585275 B CN111585275 B CN 111585275B CN 202010403089 A CN202010403089 A CN 202010403089A CN 111585275 B CN111585275 B CN 111585275B
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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
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to the technical field of electric power, in particular to a control method for intelligent ring opening and closing operation, which comprises the following steps: receiving a scheduled transfer load instruction to perform transfer load preset mode selection, performing transfer load system mode selection according to the acquired data information, and issuing a loop closing instruction of the loop closing circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection; the logic analysis judgment is carried out on the data information fed back by the loop closing circuit breaker, and the logic analysis judgment is used for confirming whether the loop closing operation is successfully completed or not: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening circuit breaker through the switching value output logic unit; logic analysis judgment is carried out on the data information fed back by the loop-opening circuit breaker, and the logic analysis judgment is used for confirming whether loop-opening operation is successfully completed or not: if the loop releasing operation is successful, the load transferring operation is completed. The invention can rapidly complete the closing and opening actions of the circuit breaker through logic judgment, and prevent the power failure problem during the operation mode adjustment.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a control method for intelligent ring opening and closing operation.
Background
At the current stage, various substations, switching stations, ring websites and distribution stations always adopt a power failure mode when the operation mode of the substation, the switching stations, the ring websites and the distribution stations is changed from a main power supply line to a standby power supply line, namely the main power supply line is cut off, and then the standby power supply line is connected to complete the transfer and match, so that the power supply quality of a user is seriously influenced, and the power failure of the user is caused.
Along with the construction of the high-level voltage power grid, the lower-level voltage power grid is required to realize the partition operation step by step, and adjacent partitions are kept in reserve; when the power system constructed by the layered partitions is transferred from the standby in the adjacent partitions, if power failure is adopted for transferring, the production and life of users are seriously affected, especially, large users and special users with high power supply quality requirements are seriously affected, 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 ring opening and closing operation.
A control method for intelligent ring opening and closing operation comprises the following steps:
receiving a scheduled transfer load instruction to perform transfer load preset mode selection, performing transfer load system mode selection according to the acquired data information, and issuing a loop closing instruction of the loop closing circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection;
the logic analysis judgment is carried out on the data information fed back by the loop closing circuit breaker, and the logic analysis judgment is used for confirming whether the loop closing operation is successfully completed or not: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening circuit breaker through the switching value output logic unit;
logic analysis judgment is carried out on the data information fed back by the loop-opening circuit breaker, and the logic analysis judgment is used for confirming whether loop-opening operation is successfully completed or not: if the loop releasing operation is successful, the load transferring operation is completed.
Preferably, if the dechucking operation fails, performing remedial measure logic analysis and judgment:
and when the remedial condition is met, issuing a remedial measure instruction, and completing load transferring operation when the position signal of the un-operated dechucking circuit breaker is changed from on to off.
Preferably, when the remedial condition is not satisfied, a recovery time interval judgment of successful ring closing operation and failure of ring opening operation is performed:
and when the recovery time interval of successful loop closing operation and failed loop opening operation reaches a preset condition, the circuit breaker is operated manually.
Preferably, when the recovery time interval for successful ring closing operation and failed ring opening operation does not reach the preset condition, the data information is continuously monitored until the remedial condition is met.
Preferably, the logic analysis and judgment of the data information fed back by the loop closing circuit breaker is used for confirming whether the loop closing operation is successfully completed, and the logic analysis and judgment 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 loop closing incoming line current is not found and the loop closing circuit breaker position signal is found, 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 is still not available, or the loop closing circuit breaker position signal is still in the split position, judging that the loop closing operation fails.
Preferably, the logic analysis and judgment on the data information fed back by the loop-opening circuit breaker is used for confirming whether the loop-opening operation is successfully completed, and the logic analysis and judgment 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, and the loop opening incoming line current is switched on or off from the position signal of the loop opening circuit breaker to the time-sharing state, judging that the loop opening operation is successful;
and judging that the loop opening operation fails when the data information fed back by the loop opening circuit breaker is inconsistent with the data information judged by logic or the loop opening incoming line current still exists or the loop opening circuit breaker position signal still is at the closing position.
Preferably, the performing the remedial measure logic analysis judgment 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 repairing condition is met;
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 repairing condition is not met.
The invention has the beneficial effects that:
the invention effectively improves the reliability and the electric energy quality of the power supply of the system, and can effectively prevent the risk of misoperation caused by misoperation of operators on site; the system can quickly remedy when primary equipment fails in the operation process, and effectively prevents the risk of power failure of a user caused by power grid failure in the operation process.
The invention rapidly completes the loop closing and opening actions of the circuit breaker through logic judgment, prevents the power failure problem during operation mode adjustment, ensures regional load balance, improves the power supply reliability and the power quality of the system, obviously reduces the operation risk of operators, and ensures the safety of equipment and the stable operation of a power grid.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic flow chart of a control method of intelligent decombination loop operation according to an embodiment of the present invention;
fig. 2 is a logic flow diagram of a method for controlling an intelligent decombination loop operation according to an embodiment of the present invention.
Detailed Description
The technical scheme of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these examples.
The basic idea of the invention is that the logic analysis and judgment are carried out on the data information fed back by the loop breaker, and the logic analysis and judgment are carried out on the data information fed back by the loop breaker, so that the adjustment of the power grid operation mode is carried out in a short time, the load transfer operation is completed, the current issuing command can be analyzed in the load transfer adjustment process, whether the current issuing command accords with the current power grid operation state or not, the corresponding remedial measures can be carried out on the faults of the power grid during the load transfer adjustment, the operating breakers can be monitored after the operation, and the loop closing and releasing time interval of the loop closing main operation breaker group is ensured to be within a controllable range.
Based on the above ideas, the invention provides a control method for intelligent ring opening operation, which is realized by an intelligent ring opening operation system, as shown in fig. 1, and comprises the following steps:
s1: receiving a scheduled transfer load instruction to perform transfer load preset mode selection, performing transfer load system mode selection according to the acquired data information, and issuing a loop closing instruction of the loop closing circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection;
s2: the logic analysis judgment is carried out on the data information fed back by the loop closing circuit breaker, and the logic analysis judgment is used for confirming whether the loop closing operation is successfully completed or not: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening circuit breaker through the switching value output logic unit;
s3: logic analysis judgment is carried out on the data information fed back by the loop-opening circuit breaker, and the logic analysis judgment is used for confirming whether loop-opening operation is successfully completed or not: if the ring-opening operation is successful, the load transferring operation is completed;
s4: if the ring-opening operation fails, carrying out remedial measure logic analysis and judgment: when the remedying condition is met, a remedying measure instruction is issued, and when the position signal of the un-operated loop-opening breaker is switched from on to off, the load transferring operation is completed;
s5: when the remedy condition is not satisfied, judging a recovery time interval of successful ring closing operation and failure of ring opening operation: when the recovery time interval of successful ring closing operation and failure ring opening operation reaches a preset condition, the circuit breaker is operated manually;
s6: and when the recovery time interval for successful ring closing operation and failed ring opening operation does not reach the preset condition, continuously monitoring the data information until the remedial condition is met.
The logic analysis and judgment of the data information fed back by the loop closing circuit breaker is used for confirming whether the loop closing operation is successfully completed or not, and the logic analysis and judgment of the data information fed back by the loop closing circuit breaker 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 loop closing incoming line current is not found and the loop closing circuit breaker position signal is found, 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 is still not available, or the loop closing circuit breaker position signal is still in the split position, judging that the loop closing operation fails.
The logic analysis and judgment are carried out on the data information fed back by the loop-opening circuit breaker, and the logic analysis and judgment are used for confirming whether the loop-opening operation is successfully completed or not and comprise 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, and the loop opening incoming line current is switched on or off from the position signal of the loop opening circuit breaker to the time-sharing state, judging that the loop opening operation is successful; and judging that the loop opening operation fails when the data information fed back by the loop opening circuit breaker is inconsistent with the data information judged by logic or the loop opening incoming line current still exists or the loop opening circuit breaker position signal still is at the closing position.
Wherein the performing a 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 repairing condition is met; 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 repairing condition is not met.
Specifically, a logic flow diagram of a control method for intelligent ring opening and closing operation of the present invention is shown in fig. 2. An operator of an electric company receives an electric company dispatching transfer load instruction, then a transfer load preset mode selection is carried out through an intelligent ring opening and closing operation system, the intelligent ring opening and closing operation system confirms that the mode selection of the system is consistent with the preset mode selection of the operator according to collected data information, including two incoming lines, two bus single-phase voltages, a breaker position signal and two incoming line currents, the system opening mode issuing authority is ensured, misoperation cannot be caused by the operator, the operator carries out operation instruction issuing of the intelligent ring opening and closing operation system, and after the operation instruction issuing, the intelligent ring opening and closing operation system carries out issuing of the ring opening and closing instruction of the ring closing breaker through a switching value output logic unit.
After the intelligent ring opening and closing operation system issues the ring opening instruction of the circuit breaker, logic analysis judgment is carried out on data information fed back by the ring opening and closing circuit breaker, including ring opening line current and ring opening circuit breaker position nodes, and the data information is used for confirming whether the ring opening operation is successfully completed.
After the intelligent ring opening and closing operation system confirms that the operation is successful, namely the data information fed back by the ring closing circuit breaker is consistent with the data information judged by the ring closing logic, the ring closing incoming line current is switched from none to none, the position signal of the ring closing circuit breaker is switched from on to off, and the intelligent ring opening and closing operation system issues a ring opening instruction of the ring opening circuit breaker through the switching value output logic unit.
If the intelligent ring opening and closing operation system confirms that the ring opening operation fails, namely the data information fed back by the ring opening and closing circuit breaker is inconsistent with the data information judged by the ring opening logic, the ring opening and closing incoming line current is still not, the position signal of the ring opening and closing circuit breaker is still in the separated position, the power grid operation mode is not changed, and the intelligent ring opening and closing operation system returns.
After the intelligent loop opening and closing operation system issues the loop opening instruction of the circuit breaker, namely the data information fed back by the loop opening and closing circuit breaker is consistent with the loop opening logic judgment data information, logic analysis judgment is carried out on the data information fed back by the loop opening and closing circuit breaker, and whether the loop opening instruction is correctly completed is confirmed.
After the intelligent ring opening and closing operation system confirms that the ring opening operation is successful, namely the data information fed back by the ring opening circuit breaker is consistent with the data information judged by the ring opening logic, the ring opening incoming line current is changed from the existence state to the nonexistence state, the position signal of the ring opening circuit breaker is changed from the closing state to the opening state, and the intelligent ring opening and closing operation system returns to finish the load transferring operation.
If the intelligent ring opening and closing operation system confirms that the ring opening operation fails, namely the data information fed back by the ring opening and closing circuit breaker is inconsistent with the data information logically judged, the ring opening and closing incoming line current still exists, the position signal of the ring opening and closing circuit breaker still is the closing position, and the intelligent ring opening and closing system performs remedial measure logic analysis judgment.
If the intelligent ring opening and closing operation system confirms that the ring opening operation fails, namely that the data information fed back by the ring opening circuit breaker is inconsistent with the data information of the logic judgment, the intelligent ring opening and closing system carries out logic analysis judgment of remedial measures, and the remedial conditions are met, namely that the data information fed back by the circuit breaker reaches the logic judgment condition of the remedial measures, the ring closing current is greater than the current opening action fixed value and the ring closing time is greater than the current opening time fixed value, the intelligent ring opening and closing operation system issues a remedial measure instruction, namely that the position signal of the circuit breaker which does not act is divided from the opening to the closing after the instruction is confirmed, and the intelligent ring opening and closing system returns.
If the intelligent ring opening and closing operation system confirms that the ring opening operation fails, namely that the data information fed back by the ring opening circuit breaker is inconsistent with the data information of the logic judgment, the intelligent ring opening and closing system carries out logic analysis judgment of remedial measures, and the remedial conditions are not met, namely that the data information fed back by the circuit breaker reaches the logical judgment conditions of the remedial measures, the ring closing current does not reach the current opening action fixed value or the ring closing time is longer than the current opening time fixed value, and the intelligent ring opening and closing operation system carries out recovery time interval judgment of successful ring opening and failure of ring closing.
After the intelligent ring opening and closing operation system confirms that the ring opening operation fails, namely that the data information fed back by the ring opening circuit breaker is inconsistent with the data information of the logic judgment, the intelligent ring opening and closing system carries out logic analysis judgment of remedial measures, and the remedial conditions are not met, namely that the data information fed back by the circuit breaker reaches the logic judgment condition of the remedial measures, the ring closing current does not reach the current opening action fixed value or the ring closing time is longer than the current opening time fixed value, the recovery time interval judgment of the success and the failure of the ring opening of the intelligent ring opening operation system reaches the preset condition, the recovery time interval fixed value of the success and the failure of the ring opening of the intelligent ring opening operation system reaches, and the intelligent ring opening operation system returns until the circuit breaker is operated manually.
After the intelligent ring opening and closing operation system confirms that the ring opening operation fails, namely that the data information fed back by the ring opening circuit breaker is inconsistent with the data information of the logic judgment, the intelligent ring opening and closing system carries out logic analysis judgment of remedial measures, the remedial conditions are not met, namely that the data information fed back by the circuit breaker reaches the logic judgment condition of the remedial measures, the ring closing current does not reach the current opening action fixed value or the ring closing time is longer than the current opening time fixed value, the recovery time interval judgment of the success and failure of the ring opening by the intelligent ring opening operation system does not reach the preset conditions, the recovery time interval fixed value of the success and failure of the ring opening is not reached, and the intelligent ring opening operation system continuously monitors the data information to judge the remedial measures for the operation.
The invention effectively improves the reliability and the electric energy quality of the power supply of the system, and can effectively prevent the risk of misoperation caused by misoperation of operators on site; the system can quickly remedy when primary equipment fails in the operation process, and effectively prevents the risk of power failure of a user caused by power grid failure in the operation process.
The invention rapidly completes the loop closing and opening actions of the circuit breaker through logic judgment, prevents the power failure problem during operation mode adjustment, ensures regional load balance, improves the power supply reliability and the power quality of the system, obviously reduces the operation risk of operators, and ensures the safety of equipment and the stable operation of a power grid.
Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (3)
1. The control method for the intelligent ring opening and closing operation is characterized by comprising the following steps of:
receiving a scheduled transfer load instruction to perform transfer load preset mode selection, performing transfer load system mode selection according to the acquired data information, and issuing a loop closing instruction of the loop closing circuit breaker through a switching value output logic unit when the received preset mode is consistent with the system mode selection;
the logic analysis judgment is carried out on the data information fed back by the loop closing circuit breaker, and the logic analysis judgment is used for confirming whether the loop closing operation is successfully completed or not: if the loop closing operation is successful, issuing a loop opening instruction of the loop opening circuit breaker through the switching value output logic unit;
logic analysis judgment is carried out on the data information fed back by the loop-opening circuit breaker, and the logic analysis judgment is used for confirming whether loop-opening operation is successfully completed or not: if the ring-opening operation is successful, the load transferring operation is completed;
if the ring-opening operation fails, performing remedial measure logic analysis and judgment, including:
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 repairing condition is met;
if the loop closing current does not reach the current splitting action fixed value or the loop closing time is smaller than the current splitting time fixed value, judging that the repairing condition is not met;
when the remedying condition is met, a remedying measure instruction is issued, and when the position signal of the un-operated loop-opening breaker is switched from on to off, the load transferring operation is completed;
when the remedy condition is not satisfied, judging a recovery time interval of successful ring closing operation and failure of ring opening operation:
when the recovery time interval of successful ring closing operation and failure ring opening operation reaches a preset condition, the circuit breaker is operated manually;
and when the recovery time interval for successful ring closing operation and failed ring opening operation does not reach the preset condition, continuously monitoring the data information until the remedial condition is met.
2. The method for controlling an intelligent ring opening and closing operation according to claim 1, wherein the logic analysis and judgment of the data information fed back by the ring closing circuit breaker is used for confirming whether the ring opening and closing operation is successfully completed, and the method 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 loop closing incoming line current is not found and the loop closing circuit breaker position signal is found, 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 is still not available, or the loop closing circuit breaker position signal is still in the split position, judging that the loop closing operation fails.
3. The method for controlling an intelligent loop opening/closing operation according to claim 1, wherein the logic analysis and judgment of the data information fed back by the loop opening/closing circuit breaker is used for confirming whether the loop opening operation is successfully completed, and the method 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, and the loop opening incoming line current is switched on or off from the position signal of the loop opening circuit breaker to the time-sharing state, judging that the loop opening operation is successful;
and judging that the loop opening operation fails when the data information fed back by the loop opening circuit breaker is inconsistent with the data information judged by logic or the loop opening incoming line current still exists or the loop opening circuit breaker position signal still is at the closing position.
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| CN112636471B (en) * | 2020-12-11 | 2022-08-02 | 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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