CN111952929A - Self-healing false switching-on judgment method and device for distribution network feeder automation terminal - Google Patents
Self-healing false switching-on judgment method and device for distribution network feeder automation terminal Download PDFInfo
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- CN111952929A CN111952929A CN202010814622.3A CN202010814622A CN111952929A CN 111952929 A CN111952929 A CN 111952929A CN 202010814622 A CN202010814622 A CN 202010814622A CN 111952929 A CN111952929 A CN 111952929A
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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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to the technical field of distribution network automatic self-healing, in particular to a distribution network feeder automatic terminal self-healing false switching-on judging method and a distribution network feeder automatic terminal self-healing false switching-on judging device, which comprise the following steps: s10, collecting voltage Up information on two sides of a switch, switch position information, remote control opening information and hand-closing operation opening information; s20, starting a self-healing false closing judgment program by switching the switch position from off to on, and firstly judging whether the switch is normally operated to close; s30, judging whether the switch is switched on by mistake or not according to whether a single-side voltage loss signal exists before the switch is switched on; s40, after the switch is switched on, whether the single-side voltage loss signal is recovered is judged through time delay: if not, a self-healing false closing alarm is sent out, or the circuit is immediately tripped to carry out self-correction. According to the invention, whether the switch is in the false switching-on state or not is judged by analyzing the difference of the related electrical sampling characteristics of the switch under the conditions of false switching-on in a normal state and single-side voltage loss switching-on, if the switch is in the false switching-on state, an alarm is sent or self-error correction logic is entered, the false switching-on switch is separated, the long-time electromagnetic ring network operation of a line is prevented, and the safe operation level of a power distribution network is improved.
Description
Technical Field
The invention relates to the technical field of distribution network protection, in particular to a method and a device for judging self-healing false switching-on of a distribution network feeder automation terminal.
Background
At present, the power failure time of a user mainly comprises two parts, namely planned power failure prearranged time and fault power failure time. With the continuous perfection of the power distribution network frame and the application of advanced maintenance technologies such as live working and the like, the planned power failure prearrangement time is greatly compressed, and if the power supply reliability is further improved, the reduction of the failure and power failure time is needed. The distribution network feeder automation technology provides a technical means for greatly reducing the fault power failure time, and is widely popularized in recent years, wherein the voltage time type feeder automation technology is applied most widely, and the voltage time type distribution network automation terminal is independent of fault positioning, isolation and self-healing through voltage loss delay switching-off, incoming call delay switching-on and single-side power loss delay switching-on of a contact switch, and has the characteristics of simplicity, high efficiency and easiness in popularization. However, the self-healing function of the interconnection switch is not put into most areas at present because the self-healing function of the interconnection switch has a large risk of false switching-on.
Chinese patent CN103066552A discloses a method for controlling anti-false switching of a circuit breaker, which comprises detecting a load circuit before switching on a circuit breaker in a breaking state in a power supply line; if the load line is found to be normal during the detection period, allowing the breaker to be switched on; and once a short-circuit fault of the load line is detected in the detection period, the locking is carried out immediately, the breaker is not allowed to be switched on, and the fault of the load line is monitored. According to the scheme, the circuit breaker is prevented from being mistakenly closed in a fault when power is transmitted after the circuit is interrupted and overhauled, the circuit breaker cannot be suitable for the interconnection switch of the distribution network circuit to prevent mistaken closing, the judgment of the operation of the electromagnetic ring network of the distribution network circuit is caused, in addition, the sampling signal is judged and processed and the result is output to the unlocking circuit by generating the sampling signal closely related to the impedance of the load circuit, the sampling detection and the judgment are only carried out on the load circuit, and the judgment accuracy are limited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method and a device for judging self-healing false switching-on of a distribution network feeder automation terminal, so that the risk of self-healing false switching-on of the feeder automation terminal is effectively avoided.
In order to solve the technical problems, the invention adopts the technical scheme that:
the method for judging the self-healing false switching-on of the distribution network feeder automation terminal comprises the following steps:
s10, collecting voltage Up information on two sides of a switch, switch position information, remote control opening information and hand-closing operation opening information;
s20, starting a self-healing false closing judgment program by switching on and off the switch position, and firstly judging whether the switch is normally operated to close: if yes, judging the program is finished; if not, the step S30 is entered;
s30, judging whether a single-side voltage loss signal exists before the switch is switched on: if not, judging that the program is finished, sending a self-healing false closing alarm, or immediately tripping to perform self-correction; if yes, go to step S40;
s40, after the switch is switched on, whether the single-side voltage loss signal is recovered is judged through time delay: if the self-healing action is recovered, judging that the self-healing action is correct; if not, the self-healing false closing is judged, a self-healing false closing alarm is sent out, or the trip is immediately carried out to carry out self-correction.
According to the self-healing false-closing judging method for the distribution network feeder automation terminal, hardware configuration of an automation switch is not required to be added, whether the switch is false-closing or not is judged by analyzing the difference of relevant electrical sampling characteristics of the switch under the conditions of false-closing and unilateral voltage loss-closing in a normal state, if the switch is judged to be false-closing, an alarm is sent or self-correction logic is entered, the false-closing switch is separated, long-time electromagnetic ring network operation of a line is prevented, and the safe operation level of a distribution network is improved.
Preferably, the self-healing false-closing distinguishing function of the distribution network feeder automation terminal is switched on and off by control words: 1 is input and 0 is output.
Preferably, in step S20, it is determined whether or not the remote control entry information or the hand close entry information is received: if yes, judging that the switch is switched on in normal operation, and finishing the judging program; if not, the process proceeds to step S30.
Preferably, in step S20, it is determined that the automatic terminal post-closing position relay KKJ and the switch closing position contact point HWJ: if both KKJ and HWJ are 1, determining that the switch-on is normally operated, and finishing the determination procedure; if not, the process proceeds to step S30.
Preferably, in step S30, it is determined whether there is a single-side no-voltage signal before the switch is turned on: if yes, the process goes to step S40; if not, the self-healing false closing is judged, a self-healing false closing alarm is sent out, or the trip is immediately carried out to carry out self-correction.
Preferably, in step S30, it is determined whether the automatic terminal has a self-healing report: if yes, the process goes to step S40; if not, the judging program is ended, and a self-healing and false-closing alarm is sent out or the trip is immediately carried out to carry out self-correction.
The invention also provides a computer readable storage medium, which comprises a self-healing false-closing judging program, and the steps of the self-healing false-closing judging method are realized when the self-healing false-closing judging program is executed by the processor.
The invention also provides a self-healing false switching-on judging device of the distribution network feeder automation terminal, which comprises an information acquisition unit, a data judging unit and an alarm unit:
the information acquisition unit is used for acquiring voltage Up information at two sides of the switch, switch position information, remote control opening information and hand closing operation opening information and transmitting the acquired information to the data processing unit;
the data discrimination unit receives and analyzes the information acquired by the information acquisition unit: if the switch-on is determined to be switched on by mistake by analysis, the alarm module is controlled to send an alarm signal or the switch is immediately tripped to carry out self-correction; if the normal closing is determined by analysis, the judging program is ended.
According to the self-healing false-closing judging device for the distribution network feeder automation terminal, whether the switch is false-closing or not is judged by analyzing the difference of relevant electrical sampling characteristics of the switch under the conditions of false-closing and unilateral voltage loss-closing in a normal state, and if the switch is judged to be false-closing, an alarm is sent or self-correction logic is entered, the false-closing switch is separated, the long-time electromagnetic ring network operation of a line is prevented, and the safe operation level of a distribution network is improved.
Furthermore, the input end of the data discrimination unit is connected with a storage unit which stores an automatic terminal self-healing report.
Further, the data discrimination unit is turned on and off by a control word: 1 is input, and 0 is input.
Compared with the prior art, the invention has the beneficial effects that:
according to the method and the device for judging the self-healing false-closing of the distribution network feeder automation terminal, the hardware configuration of an automation switch is not required to be increased, whether the switch is in false-closing or not is judged by analyzing the difference of relevant electrical sampling characteristics of the switch under the conditions of false-closing in a normal state and single-side voltage-loss closing, if the switch is judged to be in false-closing, an alarm is sent or self-healing logic is entered, the false-closing switch is separated, the long-time electromagnetic ring network operation of a line is prevented, the safe operation level of a distribution network is improved, and the bottleneck problem of the engineering popularization and application of the voltage time type feeder automation self-healing technology is solved.
Drawings
Fig. 1 is a flowchart of a self-healing false-closing judgment method for a distribution network feeder automation terminal according to the present invention;
fig. 2 is a schematic structural diagram of a self-healing false-closing judgment device of a distribution network feeder automation terminal according to the present invention;
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Example one
Fig. 1 shows an embodiment of a method for determining a self-healing false switching-on of a distribution network feeder automation terminal according to the present invention, which includes the following steps:
s10, collecting voltage Up information on two sides of a switch, switch position information, remote control opening information and hand-closing operation opening information;
s20, starting a self-healing false closing judgment program by switching on and off the switch position, and firstly judging whether the switch is normally operated to close: if yes, judging the program is finished; if not, the step S30 is entered;
s30, judging whether a single-side voltage loss signal exists before the switch is switched on: if not, judging that the program is finished, sending a self-healing false closing alarm, or immediately tripping to perform self-correction; if yes, go to step S40;
s40, after the switch is switched on, whether the single-side voltage loss signal is recovered is judged through time delay: if the self-healing action is recovered, judging that the self-healing action is correct; if not, the self-healing false closing is judged, a self-healing false closing alarm is sent out, or the trip is immediately carried out to carry out self-correction.
In the implementation of the embodiment, the hardware configuration of the automatic switch is not required to be added, whether the switch is in the false switching-on state or not is judged by analyzing the difference of relevant electrical sampling characteristics of the switch under the conditions of false switching-on and unilateral voltage loss switching-on in a normal state, if the switch is in the false switching-on state, an alarm is sent or self-error correction logic is entered, the false switching-on switch is separated, the long-time electromagnetic ring network operation of a line is prevented, and the safe operation level of the power distribution network is improved.
In one embodiment, the self-healing false-closing judgment function of the distribution network feeder automation terminal is switched on and off by control words: 1 is input and 0 is output. And the control words are adopted for switching on and off, the control logic is simple, and the implementation is easy.
In one embodiment, in step S20, it is determined whether the remote control access information or the hand access information is received: if yes, judging that the switch is switched on in normal operation, and finishing the judging program; if not, the process proceeds to step S30. In another embodiment, in step S20, the automatic terminal post-close position relay KKJ and the switch close position contact point HWJ are determined: if both KKJ and HWJ are 1, determining that the switch-on is normally operated, and finishing the determination procedure; if not, the process proceeds to step S30. Whether the switch is normally operated and switched on can be judged through a remote control switch-on and manual switch-on switching-off signal, and the judgment can also be realized through a position relay KKJ after the automatic terminal is switched on and a switch-on position auxiliary contact HWJ, so that the flexibility adjustment and the strong adaptability can be realized according to the design of a secondary circuit of the automatic terminal.
In one embodiment, in step S30, it is determined whether there is a single-side no-voltage signal before the switch is turned on: if yes, the process goes to step S40; if not, the self-healing false closing is judged, a self-healing false closing alarm is sent out, or the trip is immediately carried out to carry out self-correction. In another embodiment, in step S30, it is determined whether the automatic terminal has a self-healing report: if yes, the process goes to step S40; if not, the judging program is ended, and a self-healing and false-closing alarm is sent out or the trip is immediately carried out to carry out self-correction. Whether the switch is switched on by mistake is judged according to information before switching on, whether a unilateral decompression signal exists before switching on of the switch can be judged, whether self-healing action report exists at an automatic terminal can be judged, and the switch can be flexibly adjusted according to actual requirements and has strong adaptability.
Example two
The embodiment is an embodiment of a computer-readable storage medium, where the computer-readable storage medium includes a self-healing false-closing determination program, and when the self-healing false-closing determination program is executed by a processor, the steps of the self-healing false-closing determination method in the first embodiment are implemented.
EXAMPLE III
Fig. 2 shows an embodiment of a self-healing false-closing determination device for a distribution network feeder automation terminal, which includes an information acquisition unit, a data determination unit, and an alarm unit:
the information acquisition unit is used for acquiring voltage Up information at two sides of the switch, switch position information, remote control opening information and hand closing operation opening information and transmitting the acquired information to the data processing unit;
the data discrimination unit receives and analyzes the information acquired by the information acquisition unit: if the switch-on is determined to be switched on by mistake by analysis, the alarm module is controlled to send an alarm signal or the switch is immediately tripped to carry out self-correction; if the normal closing is determined by analysis, the judging program is ended.
When the method is implemented, whether the switch is in the false switching-on state or not is judged by analyzing the difference of relevant electrical sampling characteristics of the switch under the conditions of false switching-on and unilateral voltage loss switching-on in a normal state, if the switch is judged to be in the false switching-on state, an alarm is sent or self-error correction logic is entered, the false switching-on switch is separated, long-time electromagnetic ring network operation of a line is prevented, and the safe operation level of a power distribution network is improved.
In one embodiment, the input end of the data discrimination unit is connected with a storage unit which stores a self-healing report of the automatic terminal.
In one embodiment, the data discrimination unit is switched on and off by a control word: 1 is input, and 0 is input.
In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A self-healing false switching-on judgment method for a distribution network feeder automation terminal is characterized by comprising the following steps:
s10, collecting voltage Up information on two sides of a switch, switch position information, remote control opening information and hand-closing operation opening information;
s20, starting a self-healing false closing judgment program by switching on and off the switch position, and firstly judging whether the switch is normally operated to close: if yes, judging the program is finished; if not, the step S30 is entered;
s30, judging whether a single-side voltage loss signal exists before the switch is switched on: if not, judging that the program is finished, sending a self-healing false closing alarm, or immediately tripping to perform self-correction; if yes, go to step S40;
s40, after the switch is switched on, whether the single-side voltage loss signal is recovered is judged through time delay: if the self-healing action is recovered, judging that the self-healing action is correct; if not, the self-healing false closing is judged, a self-healing false closing alarm is sent out, or the trip is immediately carried out to carry out self-correction.
2. The distribution network feeder automation terminal self-healing false-closing judgment method according to claim 1, characterized in that the distribution network feeder automation terminal self-healing false-closing judgment function is switched on and off by control words: 1 is input and 0 is output.
3. The distribution network feeder automation terminal self-healing false switching-on judgment method according to claim 1, characterized in that in step S20, it is judged whether remote control switching-on information or hand switching-off switching-on information is received: if yes, judging that the switch is switched on in normal operation, and finishing the judging program; if not, the process proceeds to step S30.
4. The distribution network feeder automation terminal self-healing false-closing judgment method according to claim 1, characterized in that in step S20, the automatic terminal post-closing position relay KKJ and the switch closing position contact point HWJ are judged: if both KKJ and HWJ are 1, determining that the switch-on is normally operated, and finishing the determination procedure; if not, the process proceeds to step S30.
5. The distribution network feeder automation terminal self-healing false-closing judgment method according to claim 1, characterized in that in step S30, it is judged whether there is a single-side no-voltage signal before the switch is closed: if yes, the process goes to step S40; if not, the self-healing false closing is judged, a self-healing false closing alarm is sent out, or the trip is immediately carried out to carry out self-correction.
6. The distribution network feeder automation terminal self-healing false-closing judgment method according to claim 1, wherein in step S30, it is judged whether the automation terminal has a self-healing report: if yes, the process goes to step S40; if not, the judging program is ended, and a self-healing and false-closing alarm is sent out or the trip is immediately carried out to carry out self-correction.
7. A computer-readable storage medium, wherein the computer-readable storage medium includes a self-healing false-closing determination program, and when the self-healing false-closing determination program is executed by a processor, the steps of the self-healing false-closing determination method according to any one of claims 1 to 6 are implemented.
8. The utility model provides a join in marriage net feeder automation terminal self-healing mistake combined floodgate discriminating gear which characterized in that, includes information acquisition unit, data discrimination unit and alarm unit:
the information acquisition unit is used for acquiring voltage Up information at two sides of the switch, switch position information, remote control opening information and hand closing operation opening information and transmitting the acquired information to the data processing unit;
the data discrimination unit receives and analyzes the information acquired by the information acquisition unit: if the switch-on is determined to be switched on by mistake by analysis, the alarm module is controlled to send an alarm signal or the switch is immediately tripped to carry out self-correction; if the normal closing is determined by analysis, the judging program is ended.
9. The distribution network feeder automation terminal self-healing false-closing determination device according to claim 8, wherein a storage unit storing an automation terminal self-healing report is connected to the input end of the data determination unit.
10. The distribution network feeder automation terminal self-healing false-closing distinguishing device of claim 8, wherein the data distinguishing unit is turned on and off by control words: 1 is input, and 0 is input.
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| CN113241723A (en) * | 2021-05-20 | 2021-08-10 | 广东电网有限责任公司 | Self-healing method and device based on master station and voltage-time current coordination type |
| CN114362374A (en) * | 2022-03-16 | 2022-04-15 | 广东电网有限责任公司珠海供电局 | Method and system for preventing contact switch from being switched on after active load shedding of distribution network |
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