CN112421615A - Power distribution station self-healing control method and system based on intelligent breaker action - Google Patents
Power distribution station self-healing control method and system based on intelligent breaker action Download PDFInfo
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- CN112421615A CN112421615A CN202011221959.XA CN202011221959A CN112421615A CN 112421615 A CN112421615 A CN 112421615A CN 202011221959 A CN202011221959 A CN 202011221959A CN 112421615 A CN112421615 A CN 112421615A
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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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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- 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
- H02H7/28—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 for meshed systems
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a power distribution area self-healing control method and system based on intelligent breaker action, wherein the method comprises the following steps: the tripped uppermost-level intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx; the tripped next-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx; executing reclosing operation until the last stage of tripped intelligent breaker is more than a set threshold Tx after the electrification time of the upper pile head is greater than the set threshold Tx; if the intelligent circuit breaker after reclosing does not have the post-accelerated protection tripping within the time threshold Ty, the downstream has no fault point, and the backup protection detection function is started; if the accelerated protection tripping occurs within the time threshold Ty, the switching-on is not successful, and a fault point exists at the downstream. According to the invention, on the premise of not depending on communication and information interconnection, fault location and isolation in the distribution substation and self-healing of a non-fault area can be realized by analyzing the action logic sequence of the intelligent circuit breaker.
Description
Technical Field
The invention relates to the field of power system automation, in particular to a power distribution area self-healing control method and system based on intelligent breaker action.
Background
The low-voltage 400V power distribution area directly supplies power to thousands of households, is wide in points, has a bottleneck in equipment management and information sharing, has no mature and reliable fault self-healing recovery method once a fault occurs in the power distribution area, and can only realize fault point judgment and fault type discrimination by means of manual troubleshooting, so that the time required for troubleshooting and eliminating is long, and the requirements of power supply reliability and pursuit of high-quality life by the masses are difficult to meet.
Fig. 1 shows a conventional distribution substation fault processing flow. After the user has power failure, calling the service center through the 95598 telephone to perform power failure feedback; the service center judges whether the power failure is planned power failure according to a power failure plan prearranged by a power grid company, if so, the service center indicates that the current power failure is not caused by the failure of the distribution substation area, and explains the reason of the power failure to the user; if not, the current power failure is indicated to be possibly caused by the faults of the power distribution station area, the operation and maintenance department is immediately informed, goes to carry out on-site troubleshooting, and power supply is recovered.
The fault processing flow shown in fig. 1 above can find that the existing distribution substation fault processing flow has various disadvantages. The most important disadvantage is that the distribution substation area can only know that the power failure phenomenon occurs, but cannot clearly judge whether the power failure is caused by the internal failure of the distribution substation area, and further cannot realize self-healing recovery functions such as fault point and fault property research and judgment, automatic power recovery in a non-fault area and the like under the condition that the internal failure of the distribution substation area occurs. The above disadvantages are mainly due to: (1) the electric meter acquisition equipment contained in the power distribution station area does not have a fault monitoring function, and can only monitor whether a line is electrified or not and cannot realize the fault detection function even if a plurality of tail end sensing terminals are additionally installed at the current stage; (2) although the circuit breaker equipment contained in the subordinate of the power distribution station area can detect faults and trip, most of the circuit breaker equipment cannot report action information to the upper level; even if action information can be reported to an upper-level system, due to the lack of a power distribution area fault self-healing judgment system, a fault point and a fault type cannot be comprehensively judged, and subsequent automatic recovery control of a non-fault area cannot be realized.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides a power distribution area self-healing control method and system based on the action of an intelligent circuit breaker, so that the automatic isolation and positioning of faults after the faults occur in the power distribution area and the recovery power supply of a non-fault area are realized, and the self-healing control of the power distribution area is realized.
A self-healing control method for a distribution area based on intelligent breaker action comprises the following steps:
the tripped uppermost-level intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
the tripped next-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
the tripped next-lower-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
executing reclosing operation until the last stage of tripped intelligent breaker is more than a set threshold Tx after the electrification time of the upper pile head is greater than the set threshold Tx;
if the post-accelerated protection tripping does not occur within the time threshold Ty, the intelligent circuit breaker after reclosing indicates that the reclosing is successful and no fault point exists at the downstream, and at the moment, the backup protection detection function of the intelligent circuit breaker is started; if the intelligent circuit breaker after reclosing has accelerated protection tripping within the time threshold Ty, indicating that the reclosing is unsuccessful and a fault point exists at the downstream.
Preferably, for the intelligent circuit breaker with a fault point at the downstream, after the intelligent circuit breaker is subjected to accelerated protection tripping, the intelligent circuit breaker is locked and switched on until the intelligent circuit breaker is unlocked again after the fault is eliminated.
Above-mentioned any scheme preferred, for preventing that the intelligent circuit breaker of a certain intelligent circuit breaker low reaches is protected malfunctioning, within one section time delay that sets up in advance, this intelligent circuit breaker itself starts reserve protect function, the fast-breaking protection action that is promptly add a short time delay Tz as reserve protection start-up time delay automatically, specifically for intelligent circuit breaker closes a floodgate after succeeding in, starts reserve protection detection function, promptly: when within the Tmax period, detect whether a failure has occurred again? If a fault is detected, the intelligent circuit breaker delays the Tz starting trip; if the fault is not detected, after the time period of Tmax, the protection of the intelligent circuit breaker is reset.
In any of the above schemes, preferably, the intelligent circuit breaker only processes the same group of faults within a set time Tmax.
In any of the above schemes, the Tx value range is preferably 3000 and 10000 ms.
Preferably, the Ty value ranges from 2000-5000 ms.
In any of the above schemes, preferably, Tz is in the range of 300 and 500 ms.
In any of the above schemes, preferably, Tmax is in a range of 60-300 s.
Preferably, in any of the above schemes, the intelligent circuit breaker enters a three-phase voltage loss processing flow when detecting a three-phase voltage loss.
The utility model provides a distribution station district self-healing control system based on intelligent circuit breaker action, includes intelligent circuit breaker, the embedding has above-mentioned arbitrary scheme in the intelligent circuit breaker distribution station district self-healing control method based on intelligent circuit breaker action.
On the basis of the action of the intelligent circuit breaker, the invention can realize automatic fault isolation and fault location in the distribution substation through the action logic sequence of the intelligent circuit breaker on the premise of not depending on communication and information interconnection, and can recover the power supply of a non-fault area to complete the self-healing control of the non-fault area of the distribution substation. By adopting the technical scheme of the invention, the fault positioning judgment time of the distribution area can be shortened to within 60 seconds, and the self-healing recovery time of a non-fault area can be shortened to within 100 seconds.
Compared with the prior power distribution station fault processing technology, the technical scheme of the application has the following beneficial effects:
1. through the application of intelligent circuit breaker, promoted fault handling efficiency.
Through the application of the intelligent circuit breaker, the fault isolation and the self-healing recovery control of a non-fault area are automatically realized, the traditional fault processing mode adopting manual intervention is changed, the accuracy and the timeliness of fault troubleshooting are greatly improved, and the fault processing efficiency is improved.
2. The refined management of the low-voltage distribution transformer area is deepened, the fault first-aid repair efficiency is improved, and the power supply reliability is improved.
Through fault location, fault isolation and recovery self-healing recovery of non-fault areas, the normal construction, maintenance and rush-repair working efficiency of a power grid is improved, the fault chance and the fault power-off time are reduced, the fault hidden danger is timely discovered and treated, the reliability of equipment operation is improved, the power-off time of a user is reduced, and the fine management level of a power distribution station area is improved.
3. The intelligent circuit breaker device enables the traditional circuit breaker device and improves the intelligent application level.
Through embedding the self-healing method into the traditional circuit breaker equipment, the traditional circuit breaker becomes intelligent terminal equipment with primary and secondary integration, and a solid foundation is laid for deep application development of the power internet of things.
Drawings
Fig. 1 is a schematic diagram of a fault processing flow of a conventional distribution substation.
Fig. 2 is a schematic flow chart of a power distribution station self-healing control method based on the intelligent breaker action according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a power distribution area according to another embodiment of the power distribution area self-healing control method based on the action of the intelligent circuit breaker.
Fig. 4 is a schematic flowchart of a power distribution station self-healing control method based on the action of an intelligent circuit breaker according to another embodiment of the present invention.
Fig. 5 is a schematic diagram of a simulation environment for verifying effectiveness of the self-healing control method for the distribution substation based on the action of the intelligent circuit breaker.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the following examples.
Example 1
As shown in fig. 2, a power distribution station self-healing control method based on the action of an intelligent circuit breaker includes:
the tripped uppermost-level intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
the tripped next-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
the tripped next-lower-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
executing reclosing operation until the last stage of tripped intelligent breaker is more than a set threshold Tx after the electrification time of the upper pile head is greater than the set threshold Tx;
if the post-accelerated protection tripping does not occur within the time threshold Ty, the intelligent circuit breaker after reclosing indicates that the reclosing is successful and no fault point exists at the downstream, and at the moment, the backup protection detection function of the intelligent circuit breaker is started; if the intelligent circuit breaker after reclosing has accelerated protection tripping within the time threshold Ty, indicating that the reclosing is unsuccessful and a fault point exists at the downstream.
For the intelligent circuit breaker with the fault point at the downstream, after the intelligent circuit breaker is subjected to accelerated protection tripping, the intelligent circuit breaker is locked and switched on until the fault is eliminated, and then the intelligent circuit breaker is unlocked again. For preventing that the intelligent circuit breaker protection of a certain intelligent circuit breaker low reaches is malfunctioning, within one section time delay that sets up in advance, this intelligent circuit breaker itself starts reserve protect function, the quick-break protection action that promptly adds a short time delay Tz automatically as reserve protection start-up time delay, specifically for this intelligent circuit breaker closes a floodgate after succeeding in, starts reserve protection detection function, promptly: when within the Tmax period, detect whether a failure has occurred again? If a fault is detected, the intelligent circuit breaker delays the Tz starting trip; if the fault is not detected, after the time period of Tmax, the protection of the intelligent circuit breaker is reset. Within a set time Tmax, the intelligent circuit breaker only processes the same group of faults. Specifically, within a set time Tmax, after the intelligent circuit breaker is successfully reclosed (the reclosing duration is greater than Ty, namely the reclosing is considered to be successful), if a fault is detected, a tripping action is not immediately executed, but is waited for a time Tz, and if the fault still exists after the time Tz, the tripping action is executed; and if the fault does not exist after Tz, the intelligent circuit breaker is subjected to protection resetting after a time period of Tmax.
In the embodiment, the Tx value range is preferably 3000-10000 ms; ty value range is 2000-5000 ms; the value range of Tz is 300-500 ms; tmax ranges from 60 to 300 s.
And when the intelligent circuit breaker detects three-phase voltage loss, the three-phase voltage loss processing flow is started.
Example 2
The intelligent circuit breaker has functions such as perception measurement, plug-and-play, record ripples, harmonic analysis, protection, supports fault detection, protection tripping operation and reclosing function, and the conventional protection of intelligent circuit breaker includes: the protection circuit comprises a quick-break current protection device, an overcurrent short-time delay protection device, an overcurrent long-time delay protection device, an electric leakage protection device, an overvoltage protection device, a low-voltage protection device, a three-phase current unbalance protection device, a three-phase voltage unbalance protection device, a phase-lack protection device and the like, wherein once a fault is detected, a conventional protection tripping action is executed.
Fig. 3 is a schematic diagram of a power distribution area, where K denotes an intelligent circuit breaker, D1 and D2 denote fault points, and T1 and T2 denote distribution transformers. The intelligent circuit breaker is arranged on the wire inlet side of a power distribution cabinet/cable distribution box/user meter box under the power distribution area to realize end-side information sensing, and the intelligent circuit breaker is used as terminal equipment for primary and secondary fusion of self-healing control of the power distribution area.
A power distribution station self-healing control system based on intelligent circuit breaker action comprises an intelligent circuit breaker, wherein the intelligent circuit breaker is embedded with a power distribution station self-healing control method based on the intelligent circuit breaker action.
How to implement automatic fault isolation and fault location in the power distribution area through the action logic sequence of the intelligent circuit breaker, and recover power supply of a non-fault area to complete self-healing control of the non-fault area of the power distribution area is specifically described below with reference to fig. 2 and 3. The action logic sequence refers to a one-minute → two-in-one → three-out action logic sequence, wherein the one-minute represents that the intelligent circuit breaker detects a fault and performs a trip protection action; the 'double closing' means that the intelligent circuit breaker carries out reclosing action after detecting that the upper pile head is electrified for a period of time; the third point represents that after reclosing action, the post acceleration protection tripping action occurs.
When a distribution station breaks down, the phenomenon that a plurality of intelligent circuit breakers detect the faults can occur on the fault line, and protective tripping is generated. As shown in fig. 3, it is assumed that only a D2 fault point occurs in the distribution substation area, and the fault point causes the intelligent circuit breakers K11, K12 and K14 to trip, i.e., a "one-minute" action occurs. K11 is the top intelligent breaker that trips, K12 is the next intelligent breaker that trips, and K14 is the next intelligent breaker that trips. For convenience of description, in the following of the present embodiment, K11 is referred to as a class I smart breaker, K12 and K13 are referred to as class I +1 smart breakers, and K14, K15, K16, and K17 are referred to as class I +3 smart breakers. As can be seen from FIG. 3, no fault point exists on the route between K11-K12 and K12-K14, the fault point belongs to a non-fault area, and only a fault point exists downstream of K14, so that the fault point is isolated only by tripping K14. According to the power distribution area self-healing control method and system based on the intelligent circuit breaker action, under the condition that the positioning fault point is located at the downstream of K14, the fault point is isolated, and power supply of a non-fault area is recovered.
When the D2 fault point occurs, the intelligent circuit breakers K11, K12 and K14 are tripped, and the action of one minute occurs. After the action of 'one minute', a pile head on the I-level intelligent circuit breaker K11 is electrified, and after the electrification time of the pile head on the K11 is greater than a set threshold Tx, K11 executes reclosing operation; since no fault point exists between K11 and K12, after K11 recloses, the charging head of the I +1 th-level smart circuit breaker K12 detects recharging, and K12 performs a reclosing operation after detecting that the charging time of the charging head is greater than a set threshold Tx; then, the charging head of the I +2 th intelligent circuit breaker K14 detects the recharging, and the K14 performs the reclosing operation after detecting that the charging time of the charging head is greater than the set threshold Tx. Because a fault point exists downstream of the K14, after the K14 reclosure, the post acceleration protection tripping occurs within a set time threshold Ty, namely, the action of "three-thirds", and no fault point exists downstream of other intelligent breakers, the post acceleration protection tripping does not occur within the set time threshold Ty, the action is not performed any more, the reclosure is successful, the power supply is recovered in a non-fault area, and in view of the fact that the action logic sequence "one division → two divisions → three divisions" occurs in the K14, the fault point is located downstream of the K14, the K14 is locked and closed until the fault is restored and unlocked after the fault is eliminated, and the fault point is isolated. If the I + 2-level intelligent circuit breaker in the power distribution station area still has the next level, the next level and … … intelligent circuit breakers, namely the I + 3-level, I + 4-level and … … intelligent circuit breakers trip, referring to the description, the intelligent circuit breakers tripped from the I level to the last level execute reclosing operation, and fault point positioning, isolation and non-fault area power restoration are completed.
Considering that there may be a situation that the intelligent circuit breaker downstream of a certain intelligent circuit breaker is in a protection failure, therefore, a short delay Tz is automatically added to the quick-break protection action of the intelligent circuit breaker as a backup protection starting delay, and for the intelligent circuit breaker with successful reclosing, after the intelligent circuit breaker with successful reclosing is successfully closed, a backup protection detection function is started, that is: when within the Tmax period, detect whether a failure has occurred again? If a fault is detected, the intelligent circuit breaker delays the Tz starting trip; if the fault is not detected, after the time period of Tmax, the protection of the intelligent circuit breaker is reset. Specifically, referring to fig. 3 and the above description, after the K11 and K12 are successfully reclosed, a backup protection delay is started, that is, if a fault is detected again within a set time Tmax, the backup protection delay is not immediately tripped, but the backup protection delay waits for a time Tz to detect whether the fault still exists, if the fault exists, the backup protection delay is tripped, otherwise, the backup protection delay is not tripped, but the protection delay is reset after the time Tmax. The situation that the protection failure of the K14 exists possibly, namely when a fault point D2 exists at the downstream of the K14, the action of protection tripping cannot be executed, which may cause a serious safety hazard, therefore, the fast-break protection action of the K12 itself automatically adds a short delay Tz as the backup protection starting delay within a preset delay of the last-stage intelligent circuit breaker K12 of the K14. Specifically, after the K12 is reclosed successfully, in the same group of fault processing period Tmax, if a fault is detected again, a tripping action is not executed immediately, but the time Tz is waited, if the fault still exists after the time Tz, because the fault point D2 cannot be tripped and isolated due to the failure of the K14, the K12 trips, and the fault point D2 is isolated; if the fault does not exist after the time Tz, the K14 works normally, the D2 fault point is isolated through tripping, the K12 does not execute tripping action any more, and after the time Tmax, the K12 protection returns. The same procedure is used for backup protection of K11.
Within a set time Tmax, the intelligent circuit breaker only processes the same group of faults, namely, the original fault processing flow is not interrupted due to the occurrence of a new fault in the process of processing a certain fault.
And when the intelligent circuit breaker detects three-phase voltage loss, the three-phase voltage loss processing flow is started. The self-healing control method described in the present application is not executed.
Example 3
In this embodiment, a specific flow of the self-healing control method embedded in each intelligent circuit breaker is specifically described.
Before the intelligent circuit breaker is used in the self-healing control system to execute the self-healing control method, the logic parameters of the intelligent circuit breaker need to be configured, and the specific parameter identification, parameter name and parameter description which need to be configured refer to table 1.
TABLE 1
The parameters of the intelligent circuit breaker can be set when the equipment leaves a factory, and can also be written in later period through special equipment or software after being installed.
After the operating parameters of the intelligent circuit breakers in the distribution area are set according to table 1, a self-healing control method based on a one-division → two-combination → three-division action logic sequence is implemented for each intelligent circuit breaker according to the flow shown in fig. 4.
Firstly, initial parameter setting is carried out on the intelligent circuit breaker through software, and specifically set parameters and set values are as follows:
KgFaOpen_YX＝1；
KgFaMode_YX＝0；
KgReClose_YX＝1；
for the first stage switch, KgFaDaLoseDz _ YX is 1;
for the other switches, KgFaDaLoseDz _ YX is 0;
tx, Ty, Tz, Tmax are set as a certain specific numerical value in the range according to the value range in table 1.
After the initial parameter setting of the intelligent circuit breaker is completed, in the using process of the circuit breaker, the intelligent circuit breaker senses end-side information, detects voltage and current in a circulating mode, judges whether a non-three-phase voltage loss fault occurs or not, sets a parameter KgGzSgZ _ YX to be 1 when the non-three-phase voltage loss fault occurs, and executes protection action tripping, namely 'one minute' action in an action logic sequence.
After the action of one minute, the intelligent circuit breaker continuously detects whether the upper pile head is electrified, and when the continuous electrification time of the upper pile head is detected to be larger than the value of the parameter Tx, the intelligent circuit breaker judges whether the value of the parameter KgFaultValid _ YX is 1, namely whether a fault point is confirmed to be positioned at the downstream of the circuit breaker, and if not, the circuit breaker executes reclosing operation, namely the action of two minutes in the action logic sequence.
After the second closing action, detecting the duration time of successful closing of the breaker, if the duration time is not greater than the set value of the parameter Ty, generating a third action, and setting a parameter KgCloseValid _ YX to be 1, KgFaultValid _ YX to be 1, KgBackDzValid _ YX to be 1 and YK and protecting action locking, wherein the third action indicates that a fault point exists at the downstream of the breaker; if the value is greater than the set value of the parameter Ty, it indicates that the switching-on is successful, a fault point does not exist downstream of the intelligent circuit breaker, and KgBackPrt _ YX is set to 1 and KgOpenValid _ YX is set to 1, that is, backup protection detection is started.
The intelligent circuit breaker waits for a period of time Tmax, no fault is detected in the Tmax, a setting parameter KgGzSgZ _ YX is 0, KgBackPrt _ YX is 0, and KgOpenValid _ YX is 0. If a fault is detected in the Tmax, continuing waiting for time Tz, if the fault still exists after the Tz, performing backup protection tripping, setting a parameter KgBackPrt _ YX to be 0, setting KgOpenValid _ YX to be 0, and further setting the closing and locking of the breaker; if the fault does not exist after Tz, the fault is isolated by the next-stage circuit breaker tripping of the intelligent circuit breaker, the intelligent circuit breaker does not trip any more, and the protection is restored after time Tmax.
In this embodiment, three-phase voltage loss detection is also performed in a circulating manner, when three-phase voltage loss is detected, a parameter KgDySgZ _ YX is set to 1, a three-phase voltage loss processing flow is entered, whether the breaker is a primary switch is determined, and if yes, a voltage loss tripping operation is performed.
In this embodiment, the distribution substation is further provided with a communication system for actively reporting the detected fault information and the detected action information to the superior system.
Example 4
In order to verify the effectiveness of the technical scheme of the invention, an analog simulation environment is established, wherein the analog simulation system is composed of a primary circuit simulation system and a secondary device, and the specific simulation environment is shown in fig. 5. The primary circuit simulation system mainly comprises four parts: the intelligent circuit breaker comprises an analog power supply part, an intelligent circuit breaker part, a fault analog unit and an analog load. In order to simulate more actual lines, the primary line simulation system is designed into double power supply points, the double power supply points are mutually standby through the interconnection switch, and the primary line simulation system is unfolded according to three levels of a distribution side, a line side branch box and a user side meter box. The secondary equipment part is provided with an intelligent circuit breaker, and parameters of the intelligent circuit breaker are set.
Through simulation experiment verification, the technical scheme of the invention can realize automatic fault isolation and fault location in the distribution substation area by analyzing the action logic sequence of the intelligent circuit breaker on the premise of not depending on communication and information interconnection, and can recover the power supply of the non-fault area to complete the self-healing control of the non-fault area of the distribution substation area; the fault location judgment in the power distribution station area can be realized within 60 seconds, the self-healing of the non-fault area can be realized within 100 seconds, and the power supply of the non-fault area is recovered.
Compared with the prior power distribution station fault processing technology, the technical scheme of the application has the following beneficial effects:
1. through the application of intelligent circuit breaker, promoted fault handling efficiency.
Through the application of the intelligent circuit breaker, the fault isolation and the self-healing recovery control of a non-fault area are automatically realized, the traditional fault processing mode adopting manual intervention is changed, the accuracy and the timeliness of fault troubleshooting are greatly improved, and the fault processing efficiency is improved.
2. The refined management of the low-voltage distribution transformer area is deepened, the fault first-aid repair efficiency is improved, and the power supply reliability is improved.
Through fault location, fault isolation and recovery self-healing recovery of non-fault areas, the normal construction, maintenance and rush-repair working efficiency of a power grid is improved, the fault chance and the fault power-off time are reduced, the fault hidden danger is timely discovered and treated, the reliability of equipment operation is improved, the power-off time of a user is reduced, and the fine management level of a power distribution station area is improved.
3. The intelligent circuit breaker device enables the traditional circuit breaker device and improves the intelligent application level.
Through embedding the self-healing method into the traditional circuit breaker equipment, the traditional circuit breaker becomes intelligent terminal equipment with primary and secondary integration, and a solid foundation is laid for deep application development of the power internet of things.
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the foregoing embodiments illustrate the invention in detail, those skilled in the art will appreciate that: it is possible to modify the technical solutions described in the foregoing embodiments or to substitute some or all of the technical features thereof, without departing from the scope of the technical solutions of the present invention.
Claims (10)
1. A self-healing control method for a power distribution area based on intelligent breaker action is characterized by comprising the following steps: the method comprises the following steps:
the tripped uppermost-level intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
the tripped next-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
the tripped next-lower-stage intelligent breaker executes reclosing operation after the electrification time of the upper pile head is greater than a set threshold Tx;
executing reclosing operation until the last stage of tripped intelligent breaker is more than a set threshold Tx after the electrification time of the upper pile head is greater than the set threshold Tx;
if the post-accelerated protection tripping does not occur within the time threshold Ty, the intelligent circuit breaker after reclosing indicates that the reclosing is successful and no fault point exists at the downstream, and at the moment, the backup protection detection function of the intelligent circuit breaker is started; if the intelligent circuit breaker after reclosing has accelerated protection tripping within the time threshold Ty, indicating that the reclosing is unsuccessful and a fault point exists at the downstream.
2. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 1, wherein: for the intelligent circuit breaker with the fault point at the downstream, after the intelligent circuit breaker is subjected to accelerated protection tripping, the intelligent circuit breaker is locked and switched on until the fault is eliminated, and then the intelligent circuit breaker is unlocked again.
3. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 1, wherein: for preventing that the intelligent circuit breaker protection of a certain intelligent circuit breaker low reaches is malfunctioning, within one section time delay that sets up in advance, this intelligent circuit breaker itself starts reserve protect function, promptly at the automatic short delay Tz that adds of quick-break protection action as reserve protection start-up time delay, specifically for intelligent circuit breaker closes a floodgate after succeeding in, starts reserve protection and detects the function, promptly: when within the Tmax period, detect whether a failure has occurred again? If a fault is detected, the intelligent circuit breaker delays the Tz starting trip; if the fault is not detected, after the time period of Tmax, the protection of the intelligent circuit breaker is reset.
4. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 1, wherein: within a set time Tmax, the intelligent circuit breaker only processes the same group of faults.
5. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 1, wherein: tx ranges from 3000 + 10000 ms.
6. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 1, wherein: ty is in the range of 2000-5000 ms.
7. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 3, wherein: the range of Tz is 300-500 ms.
8. The power distribution station self-healing control method based on intelligent circuit breaker action according to claim 4, characterized in that: tmax ranges from 60 to 300 s.
9. The self-healing control method for the distribution substation based on the intelligent breaker action as claimed in claim 1, wherein: and when the intelligent circuit breaker detects three-phase voltage loss, the three-phase voltage loss processing flow is started.
10. The utility model provides a distribution station self-healing control system based on intelligent circuit breaker action, includes intelligent circuit breaker, its characterized in that: the self-healing control method for the distribution substation based on the intelligent circuit breaker action as claimed in any one of claims 1 to 9 is embedded in the intelligent circuit breaker.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267702A (en) * | 2021-06-24 | 2021-08-17 | 广东电网有限责任公司 | Method and device for generating test case of power distribution network fault self-healing system |
| CN114256819A (en) * | 2021-12-21 | 2022-03-29 | 青岛鼎信通讯股份有限公司 | Terminal-based self-healing control method for transformer area |
| CN116207702A (en) * | 2023-03-16 | 2023-06-02 | 石家庄科林物联网科技有限公司 | Multi-factor minimum set power distribution network fault research and judgment-based power restoration method and device |
| CN117081013A (en) * | 2023-08-24 | 2023-11-17 | 常熟理工学院 | Feedforward type overcurrent backup protection method and system for low-voltage distribution line |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786522A (en) * | 2016-12-16 | 2017-05-31 | 湖南世优电力科技股份有限公司 | Intelligent distribution network self-healing control method based on peer-to-peer communication network |
| CN107069676A (en) * | 2016-12-09 | 2017-08-18 | 国家电网公司 | Distribution network failure positions and quickly isolated recovery control method |
| CN107453317A (en) * | 2017-09-21 | 2017-12-08 | 国网山东省电力公司 | A kind of three times reclosing method of distribution line |
| CN108448545A (en) * | 2018-04-12 | 2018-08-24 | 国网湖北省电力有限公司电力科学研究院 | A kind of formula feeder automation fault handling method of coincidence on the spot based on breaker |
| CN108767824A (en) * | 2018-06-19 | 2018-11-06 | 西安兴汇电力科技有限公司 | A kind of intelligent feeder automation part on the spot is delayed differential fitting method and application |
-
2020
- 2020-11-05 CN CN202011221959.XA patent/CN112421615A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069676A (en) * | 2016-12-09 | 2017-08-18 | 国家电网公司 | Distribution network failure positions and quickly isolated recovery control method |
| CN106786522A (en) * | 2016-12-16 | 2017-05-31 | 湖南世优电力科技股份有限公司 | Intelligent distribution network self-healing control method based on peer-to-peer communication network |
| CN107453317A (en) * | 2017-09-21 | 2017-12-08 | 国网山东省电力公司 | A kind of three times reclosing method of distribution line |
| CN108448545A (en) * | 2018-04-12 | 2018-08-24 | 国网湖北省电力有限公司电力科学研究院 | A kind of formula feeder automation fault handling method of coincidence on the spot based on breaker |
| CN108767824A (en) * | 2018-06-19 | 2018-11-06 | 西安兴汇电力科技有限公司 | A kind of intelligent feeder automation part on the spot is delayed differential fitting method and application |
Non-Patent Citations (4)
| Title |
|---|
| 史裕等: "城市配电网分布式自愈控制方法与系统", 《山东电力技术》 * |
| 吕立平等: "全断路器配网自愈控制策略研究", 《电气应用》 * |
| 许菲等: "自适应复杂配电线路的就地型馈线自动化策略", 《水电能源科学》 * |
| 陈绍辉: "基于对等式通信智能分布式配电网自愈技术研究", 《云南电力技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267702A (en) * | 2021-06-24 | 2021-08-17 | 广东电网有限责任公司 | Method and device for generating test case of power distribution network fault self-healing system |
| CN114256819A (en) * | 2021-12-21 | 2022-03-29 | 青岛鼎信通讯股份有限公司 | Terminal-based self-healing control method for transformer area |
| CN114256819B (en) * | 2021-12-21 | 2023-08-08 | 青岛鼎信通讯股份有限公司 | Terminal-based self-healing control method for platform area |
| CN116207702A (en) * | 2023-03-16 | 2023-06-02 | 石家庄科林物联网科技有限公司 | Multi-factor minimum set power distribution network fault research and judgment-based power restoration method and device |
| CN116207702B (en) * | 2023-03-16 | 2023-08-25 | 石家庄科林物联网科技有限公司 | Multi-factor minimum set power distribution network fault research and judgment-based power restoration method and device |
| CN117081013A (en) * | 2023-08-24 | 2023-11-17 | 常熟理工学院 | Feedforward type overcurrent backup protection method and system for low-voltage distribution line |
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