CN114938074A - Automatic system applied to community power distribution - Google Patents
Automatic system applied to community power distribution Download PDFInfo
- Publication number
- CN114938074A CN114938074A CN202210661735.3A CN202210661735A CN114938074A CN 114938074 A CN114938074 A CN 114938074A CN 202210661735 A CN202210661735 A CN 202210661735A CN 114938074 A CN114938074 A CN 114938074A
- Authority
- CN
- China
- Prior art keywords
- fault
- power distribution
- voltage
- current
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- H02J13/00002—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 characterised by monitoring
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- 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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/263—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 involving signal transmission between at least two stations involving transmissions of measured values
-
- 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
- H02J13/00004—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 characterised by the power network being locally controlled
-
- 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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/0012—Contingency detection
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
Abstract
The invention relates to the technical field of distribution automation, in particular to an automation system applied to community distribution, which comprises: the distribution main station is connected with a plurality of distribution substations, each distribution substation is connected with a plurality of feeder terminals and used for receiving monitoring data aiming at the circuit operation state and sent by the feeder terminals, and each distribution substation is provided with a substation database and used for storing the monitoring data and fault logs; when the power grid has a fault, the power distribution substation retrieves the substation database, judges whether similar conditions exist in the fault log according to the monitoring data, if the similar conditions exist, the power distribution substation selects the same mode as the solution plan in the fault log to process the fault, if the similar conditions do not exist, the power distribution substation transmits the fault information to the power distribution main station, and the power distribution main station retrieves the main station database to further judge, so that the remote maintenance and self-diagnosis functions are realized, and the efficiency of the system for solving the power grid fault is improved.
Description
Technical Field
The invention relates to the technical field of distribution automation, in particular to an automation system applied to community distribution.
Background
The distribution automation is established on the basis of informatization, information integration is carried out on-line data and off-line data of a distribution system, distribution network data and user data, a power grid structure and a geographical graph to form a complete automation system, the automation of monitoring, protection and control and power consumption and distribution management under normal operation and accident states of the distribution network and equipment thereof is realized, and finally, the on-line and quasi-real-time closed-loop control of the distribution system with the aims of greatly improving the distribution reliability and improving the power quality is realized.
Chinese patent publication No.: CN 102306955B discloses a community power distribution automation system, which includes a server, where the server is equipped with a power distribution automation software system, and the software system performs topology analysis on a line to provide a fault handling policy for a worker; the topology analysis of the line comprises the steps of determining the fault position, listing switches required to be switched off for fault isolation and listing switches required to be switched on for fault recovery, and finally, the execution is confirmed by workers. It can be seen that the following problems exist: when a fault occurs, the fault needs to be solved by workers, and the efficiency of solving the grid fault is low.
Disclosure of Invention
Therefore, the invention provides an automatic system applied to community power distribution, which is used for solving the problem of low efficiency of grid faults in the prior art.
To achieve the above object, the present invention provides an automation system for cell power distribution, including:
the power distribution main station is connected with the power distribution substations and is used for monitoring, remotely controlling and carrying out man-machine interaction on the circuit operation state in the radiation range; a main station database is arranged in the power distribution main station and used for storing monitoring data and fault logs sent by the power distribution substation;
each power distribution substation is connected with a plurality of feeder terminals and used for receiving monitoring data aiming at the circuit running state and sent by the feeder terminals, and a substation database is arranged in each power distribution substation and used for storing the monitoring data and fault logs; when the power grid fails, the power distribution substation retrieves the substation database and judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the same mode as a solution plan in the fault log to process the fault, if the similar conditions do not exist, the power distribution substation sends fault information to the power distribution main station, and the power distribution main station retrieves the main station database to further judge;
the feeder terminal is used for collecting power grid data, monitoring the power grid in real time, disconnecting the switch when a circuit fails and sending power parameter information obtained when the circuit fails to the power distribution substation connected with the switch.
Further, the electrical parameters monitored by the feeder terminal include current I, voltage V, duration ta after the current exceeds a preset standard, and duration tb after the voltage exceeds the preset standard; when the circuit is in fault, the feeder terminal firstly disconnects the switch, and in the disconnection process, the feeder terminal sends fault information to the power distribution substation, the power distribution substation judges the fault type and calculates the proportional ratio of each electrical parameter to judge whether similar conditions exist in the fault log,
if the similar conditions exist, the power distribution substation selects the same mode as the solution plan in the fault log to process the fault;
and if the similar conditions do not exist, the power distribution substation sends the fault information to the power distribution main station, and the power distribution main station searches the main station database for further judgment.
Further, the distribution substation divides the fault into:
the method comprises the steps that current overload occurs, and when a current overload fault occurs, the distribution substation records an actual current value I and a duration time ta after the actual current exceeds a preset standard;
the method comprises the following steps that voltage overload is carried out, and when a voltage overload fault occurs, the distribution substation records an actual voltage value V and a duration tb after the actual voltage exceeds a preset standard;
and when the current and the voltage are simultaneously in overload fault, the distribution substation records an actual current value I, an actual voltage value V, a duration ta after the actual current exceeds a preset standard and a larger value in a duration tb after the actual voltage exceeds the preset standard.
Furthermore, the distribution substation is provided with a preset current standard value I0, the actual current is I when a fault occurs, the distribution substation calculates the ratio A of I to I0, and A is set to be I/I0; in the fault log of the distribution substation, a preset current standard value is Ia0, the actual current when the fault occurs is Ia, the distribution substation calculates a ratio Aa of Ia0 to Ia, and Aa is set to be Ia/Ia 0; when the fault occurs, the power distribution substation judges whether the fault log is similar to the fault log according to the ratio of the actual current to the preset current in the fault log and the ratio of the actual current to the preset current; the distribution substation is provided with a preset current ratio interval sigma 0 (sigma 1, sigma 2), wherein sigma 1 is the lowest current ratio, sigma 2 is the highest current ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends the fault information to the power distribution master station, and the power distribution master station searches a master station database for further judgment;
and if sigma belongs to sigma 0 (sigma 1, sigma 2), the distribution substation further judges the similarity between the duration of the fault current exceeding the preset standard and the fault log record.
Further, when the current ratio is in a preset interval, the distribution substation calculates a ratio phi between a duration ta after the fault current exceeds a preset standard and a duration ta0 in the fault log, and sets phi to ta/ta0, the distribution substation is provided with a preset overload current duration ratio interval phi 0 (phi 1, phi 2), wherein phi 1 is a lowest duration ratio, phi 2 is a highest duration ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends the fault information to the power distribution master station, and the power distribution master station searches a master station database for further judgment;
if phi belongs to phi 0 (phi 1, phi 2), the distribution substation judges that the similarity between the fault and the record of the fault log is high and processes the fault in the same way as the solution plan in the fault log.
Furthermore, the distribution substation is provided with a preset voltage standard value V0, the actual voltage is V when a fault occurs, the distribution substation calculates the ratio B of V to V0, and B is set to be V/V0; in the fault log of the distribution substation, a preset voltage standard value is Va0, the actual voltage is Va when a fault occurs, the distribution substation calculates the proportion Ba of Va0 and Va, and Ba is set to be Va/Va 0; when the power distribution substation obtains B and Ba, calculating the epsilon of the ratio of B to Ba, setting epsilon as B/Ba, and when the fault is voltage overload, judging whether the fault is similar to a fault log or not by the power distribution substation according to the ratio of the actual voltage to the preset voltage in the fault log and the fault log; the distribution substation is provided with a preset voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), wherein epsilon 1 is the lowest voltage ratio, epsilon 2 is the highest voltage ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment;
and if the epsilon belongs to epsilon 0 (epsilon 1, epsilon 2), the power distribution substation further judges the similarity between the duration of the fault voltage exceeding the preset standard and the fault log record.
Further, when the voltage proportion ratio is in a preset interval, the power distribution substation calculates the ratio τ of the duration tb after the fault voltage exceeds the preset standard to the duration tb0 in the fault log, sets τ to be tb/tb0, is provided with a preset overload voltage duration ratio interval τ 0(τ 1, τ 2), wherein τ 1 is the lowest duration ratio, τ 2 is the highest duration ratio,
if it is
The power distribution substationJudging that the similarity between the fault and the fault log record is low, sending fault information to the power distribution master station, and searching a master station database by the power distribution master station for further judgment;
if tau belongs to tau 0 (tau 1, tau 2), the distribution substation judges that the similarity of the fault and the record of the fault log is high and processes the fault in the same way as the solution plan in the fault log.
Further, when the fault is that the current and the voltage are overloaded at the same time, the distribution substation calculates the ratio of the actual current to the preset current, the ratio of the actual voltage to the preset voltage, and the ratio of the duration time after the electrical parameter exceeds the preset standard to the duration time in the fault log to determine whether the fault is similar to the fault log,
when the duration ta after the time of the fault current exceeding the preset standard is longer than the duration tb after the time of the fault voltage exceeding the preset standard,
if the calculated current proportion value is located in a current proportion interval sigma 0 (sigma 1, sigma 2) and the voltage proportion value is located in a voltage proportion interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration proportion of the fault current after exceeding the preset standard is located in an overload current duration proportion interval phi 0 (phi 1, phi 2), the distribution substation judges that the similarity between the fault and the fault log record is high and selects the same mode as the solution plan in the fault log to process the fault;
and if the calculated ratio of the current exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the ratio of the voltage exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the ratio of the duration of the fault current after exceeding a preset standard exceeds an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the similarity of the fault and the fault log record is low and sends the fault information to the power distribution master station, and the power distribution master station searches a master station database for further judgment.
Further, when the fault occurs in which the current and the voltage are simultaneously overloaded and the duration tb after the fault voltage exceeds the preset standard is longer than the duration ta after the fault current exceeds the preset standard,
if the calculated current proportion value is in a current proportion interval sigma 0 (sigma 1, sigma 2) and the voltage proportion value is in a voltage proportion interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration proportion of the fault voltage after exceeding the preset standard is in an overload voltage duration proportion interval tau 0 (tau 1, tau 2), the distribution substation judges that the similarity between the fault and the fault log record is high and selects the same mode as the solution plan in the fault log to process the fault;
if the calculated current ratio exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the voltage ratio exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the fault voltage exceeds an overload voltage duration ratio interval tau 0 (tau 1, tau 2) after the fault voltage exceeds a preset standard, the power distribution substation judges that the similarity of the fault and the fault log record is low and sends the fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment.
Further, if the similarity between the fault and the fault log is low, the power distribution substation sends the fault information to the power distribution main station, the power distribution main station searches the main station database, and whether similar conditions exist in the fault log is judged in a mode the same as the searching mode and the judgment standard of the power distribution substation;
if the similar conditions exist, the power distribution master station judges that the fault reason is the same as the fault reason recorded in the fault log, and selects the mode the same as the solution plan in the fault log to process the fault;
and if the similar conditions do not exist, the power distribution main station sends the fault information to maintenance personnel.
Compared with the prior art, the system has the advantages that the substation database is searched when the power grid fails, whether similar conditions exist in the fault log is judged according to the monitoring data, if the similar conditions exist, the power distribution substation selects the mode same as the mode for solving the plan in the fault log to process the fault, the remote maintenance and self-diagnosis functions are realized, and the efficiency of solving the power grid fault by the system is improved.
Furthermore, when the power distribution substation judges that the fault of the power grid does not have a similar condition with the fault log in the substation database, the power distribution substation sends the fault information to the power distribution main station, and the power distribution main station searches the main station database for further judgment.
Furthermore, the power distribution master station searches the master station database, judges whether similar conditions exist in the fault log according to the monitoring data, and if the similar conditions exist, the power distribution master station processes the fault in the same way as the solution plan in the fault log, so that the remote maintenance and self-diagnosis functions are realized, and the solution efficiency of the system to the power grid fault is improved.
Furthermore, the power distribution substation determines whether the fault is similar to the fault log according to the fault type and the time length of the electrical parameter exceeding the preset time, so that the accuracy of the system for judging the power grid fault is improved.
Drawings
Fig. 1 is a block diagram of an automation system for cell power distribution according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a block diagram of an automation system for cell power distribution according to the present invention, which includes:
the power distribution main station is connected with the power distribution substations and is used for monitoring, remotely controlling and carrying out man-machine interaction on the circuit operation state in the radiation range; a main station database is arranged in the power distribution main station and used for storing monitoring data and fault logs sent by the power distribution substation;
each power distribution substation is connected with a plurality of feeder terminals and used for receiving monitoring data aiming at the circuit running state and sent by the feeder terminals, and a substation database is arranged in each power distribution substation and used for storing the monitoring data and fault logs; when the power grid fails, the power distribution substation retrieves the substation database and judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the same mode as a solution plan in the fault log to process the fault, if the similar conditions do not exist, the power distribution substation sends fault information to the power distribution main station, and the power distribution main station retrieves the main station database to further judge;
the feeder terminal is used for collecting power grid data, monitoring the power grid in real time, disconnecting the switch when a circuit fails and sending power parameter information obtained when the circuit fails to the power distribution substation connected with the switch.
Specifically, the fault log comprises power-off duration T, various electrical parameter information during power-off, power-off reason remarks and a solution plan.
Specifically, the electrical parameters monitored by the feeder terminal include a current I, a voltage V, a duration ta after the current exceeds a preset standard, and a duration tb after the voltage exceeds the preset standard; when the circuit is in fault, the feeder terminal firstly disconnects the switch, and in the disconnection process, the feeder terminal sends fault information to the power distribution substation, the power distribution substation judges the fault type and calculates the proportional ratio of each electrical parameter to judge whether similar conditions exist in the fault log,
if the similar conditions exist, the power distribution substation selects the same mode as the solution plan in the fault log to process the fault;
and if the similar conditions do not exist, the power distribution substation sends the fault information to the power distribution main station, and the power distribution main station searches the main station database for further judgment.
In the embodiment, when the power grid fails, the substation database is retrieved by the power distribution substation, whether similar conditions exist in the fault log is judged according to the monitoring data, and if the similar conditions exist, the power distribution substation selects the mode same as the mode for solving the plan in the fault log to process the fault, so that the remote maintenance and self-diagnosis functions are realized, and the efficiency of solving the power grid fault by the system is improved.
In this embodiment, when it is determined that a fault occurring in the power grid does not have a similar condition with a fault log in the substation database, the power distribution substation sends fault information to the power distribution master station, and the power distribution master station searches the master station database for further determination.
Specifically, the power distribution substation divides the fault into:
the method comprises the following steps that current overload occurs, and when a current overload fault occurs, the distribution substation records an actual current value I and a duration time ta after the actual current exceeds a preset standard;
the method comprises the following steps that voltage overload is carried out, and when a voltage overload fault occurs, the distribution substation records an actual voltage value V and a duration tb after the actual voltage exceeds a preset standard;
and when the current and the voltage are simultaneously in overload fault, the distribution substation records an actual current value I, an actual voltage value V, a duration ta after the actual current exceeds a preset standard and a larger value in a duration tb after the actual voltage exceeds the preset standard.
Specifically, the distribution substation is provided with a preset current standard value I0, the actual current is I when a fault occurs, the distribution substation calculates the ratio A of I to I0, and A is set to be I/I0; in the fault log of the distribution substation, a preset current standard value is Ia0, the actual current when the fault occurs is Ia, the distribution substation calculates a ratio Aa of Ia0 to Ia, and Aa is set to be Ia/Ia 0; when the fault occurs, the power distribution substation judges whether the fault log is similar to the fault log according to the ratio of the actual current to the preset current in the fault log and the ratio of the actual current to the preset current; the distribution substation is provided with a preset current ratio interval sigma 0 (sigma 1, sigma 2), wherein sigma 1 is the lowest current ratio, sigma 2 is the highest current ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment;
and if sigma belongs to sigma 0 (sigma 1, sigma 2), the distribution substation further judges the similarity between the duration of the fault current exceeding the preset standard and the fault log record.
Specifically, when the current ratio is in a preset interval, the distribution substation calculates a ratio phi of a duration ta after the fault current exceeds a preset standard to a duration ta0 in a fault log, and sets phi to ta/ta0, the distribution substation is provided with a preset overload current duration ratio interval phi 0 (phi 1, phi 2), wherein phi 1 is a lowest duration ratio, phi 2 is a highest duration ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment;
if phi belongs to phi 0 (phi 1, phi 2), the distribution substation judges that the similarity between the fault and the record of the fault log is high and processes the fault in the same way as the solution plan in the fault log.
Specifically, the power distribution substation is provided with a preset voltage standard value V0, the actual voltage is V when a fault occurs, the power distribution substation calculates the ratio B of V to V0, and B is set to be V/V0; in the fault log of the distribution substation, a preset voltage standard value is Va0, the actual voltage is Va when a fault occurs, the distribution substation calculates the proportion Ba of Va0 and Va, and Ba is set to be Va/Va 0; when the fault occurs is voltage overload, the power distribution substation judges whether the situation is similar to the fault log according to the ratio of the actual voltage to the preset voltage in the fault log and the fault log; the distribution substation is provided with a preset voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), wherein epsilon 1 is the lowest voltage ratio, epsilon 2 is the highest voltage ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment;
and if the epsilon belongs to the epsilon 0 (epsilon 1, epsilon 2), the distribution substation further judges the similarity between the duration of the fault voltage exceeding the preset standard and the fault log record.
Specifically, when the voltage proportion ratio is in a preset interval, the power distribution substation calculates the ratio τ of the duration tb after the fault voltage exceeds the preset standard to the duration tb0 in the fault log, and sets τ to be tb/tb0, the power distribution substation is provided with preset overload voltage duration ratio intervals τ 0(τ 1, τ 2), wherein τ 1 is the lowest duration ratio, τ 2 is the highest duration ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends the fault information to the power distribution master station, and the power distribution master station searches a master station database for further judgment;
if tau belongs to tau 0 (tau 1, tau 2), the distribution substation judges that the similarity of the fault and the record of the fault log is high and processes the fault in the same way as the solution plan in the fault log.
Specifically, when the fault is that the current and the voltage are overloaded at the same time, the distribution substation calculates the ratio of the actual current to the preset current, the ratio of the actual voltage to the preset voltage, and the ratio of the duration after the electrical parameter exceeds the preset standard to the duration in the fault log to determine whether the fault is similar to the fault log, when the duration ta after the fault current exceeds the preset standard is greater than the duration tb after the fault voltage exceeds the preset standard,
if the calculated current proportion value is located in a current proportion interval sigma 0 (sigma 1, sigma 2) and the voltage proportion value is located in a voltage proportion interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration proportion of the fault current after exceeding the preset standard is located in an overload current duration proportion interval phi 0 (phi 1, phi 2), the distribution substation judges that the similarity between the fault and the fault log record is high and selects the same mode as the solution plan in the fault log to process the fault;
if the calculated current ratio exceeds the current ratio range sigma 0 (sigma 1, sigma 2) or the voltage ratio exceeds the voltage ratio range epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the fault current exceeds the duration ratio range phi 0 (phi 1, phi 2) after the preset standard, the power distribution substation judges that the similarity of the fault and the fault log record is low and sends the fault information to the power distribution main station, and the power distribution main station searches the main station database for further judgment.
Specifically, when the fault occurs in which the current and the voltage are simultaneously overloaded and the duration tb after the fault voltage exceeds the preset criterion is longer than the duration ta after the fault current exceeds the preset criterion,
if the calculated current proportion value is in a current proportion interval sigma 0 (sigma 1, sigma 2) and the voltage proportion value is in a voltage proportion interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration proportion of the fault voltage after exceeding the preset standard is in an overload voltage duration proportion interval tau 0 (tau 1, tau 2), the distribution substation judges that the similarity between the fault and the fault log record is high and selects the same mode as the solution plan in the fault log to process the fault;
if the calculated current ratio exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the voltage ratio exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the fault voltage exceeds an overload voltage duration ratio interval tau 0 (tau 1, tau 2) after the fault voltage exceeds a preset standard, the power distribution substation judges that the similarity of the fault and the fault log record is low and sends the fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment.
Specifically, if the similarity between the fault and the fault log is low, the power distribution substation sends the fault information to the power distribution main station, the power distribution main station searches the main station database, and whether similar conditions exist in the fault log is judged in the same way as the searching way and the judgment standard of the power distribution substation;
if the similar conditions exist, the power distribution master station judges that the fault reason is the same as the fault reason recorded in the fault log, and selects the mode the same as the solution plan in the fault log to process the fault;
and if the similar conditions do not exist, the power distribution main station sends the fault information to maintenance personnel.
According to the embodiment, the distribution substation determines whether the fault is similar to the fault log or not according to the fault type and the time length of the electrical parameter exceeding the preset time, so that the accuracy of judging the power grid fault by the system provided by the invention is improved.
In this embodiment, the power distribution master station retrieves the master station database, determines whether similar conditions exist in the fault log according to the monitoring data, and if the similar conditions exist, the power distribution master station processes the fault in the same way as the solution plan in the fault log, so that the remote maintenance and self-diagnosis functions are realized, and the solution efficiency of the system of the invention on the power grid fault is improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automation system for distribution of power to a cell, comprising:
the power distribution main station is connected with the power distribution substations and is used for monitoring, remotely controlling and carrying out man-machine interaction on the circuit operation state in the radiation range; a main station database is arranged in the power distribution main station and used for storing monitoring data and fault logs sent by the power distribution substation;
each power distribution substation is connected with a plurality of feeder terminals and used for receiving monitoring data aiming at the circuit running state and sent by the feeder terminals, and a substation database is arranged in each power distribution substation and used for storing the monitoring data and fault logs; when the power grid fails, the power distribution substation retrieves the substation database and judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the same mode as that for solving a plan in the fault log to process the fault, if the similar conditions do not exist, the power distribution substation sends fault information to the power distribution master station, and the power distribution master station retrieves the master station database to further judge;
the feeder terminal is used for collecting power grid data, monitoring a power grid in real time, disconnecting the switch when a circuit fails and sending power acquisition parameter information when the circuit fails to the power distribution substation connected with the switch.
2. The automated system for cellular power distribution according to claim 1, wherein the electrical parameters monitored by the feeder terminals include current I, voltage V, duration ta after the current exceeds a preset criterion, and duration tb after the voltage exceeds a preset criterion; when the circuit is in fault, the feeder terminal firstly disconnects the switch, and in the disconnection process, the feeder terminal sends fault information to the power distribution substation, the power distribution substation judges the fault type and calculates the proportional ratio of each electrical parameter to judge whether similar conditions exist in the fault log,
if the similar conditions exist, the power distribution substation selects the same mode as the solution plan in the fault log to process the fault;
and if the similar conditions do not exist, the power distribution substation sends the fault information to the power distribution main station, and the power distribution main station searches the main station database for further judgment.
3. The automation system for distribution of electricity to a cell according to claim 2, wherein the distribution substation divides the case of failure into:
the method comprises the following steps that current overload occurs, and when a current overload fault occurs, the distribution substation records an actual current value I and a duration time ta after the actual current exceeds a preset standard;
the distribution substation records an actual voltage value V and a duration tb after the actual voltage exceeds a preset standard when the voltage overload fault occurs;
and when the current and the voltage are simultaneously in overload fault, the distribution substation records an actual current value I, an actual voltage value V, a duration ta after the actual current exceeds a preset standard and a larger value in a duration tb after the actual voltage exceeds the preset standard.
4. The automation system applied to community power distribution according to claim 3, wherein the power distribution substation is provided with a preset current standard value I0, the actual current when a fault occurs is I, the power distribution substation calculates the ratio a of I to I0, and sets a to I/I0; in the fault log of the distribution substation, a preset current standard value is Ia0, the actual current is Ia when a fault occurs, the distribution substation calculates the proportion Aa of Ia0 and Ia, and sets Aa as Ia/Ia 0; when the fault is current overload, the distribution substation judges whether the fault is similar to the fault log according to the ratio of the actual current to the preset current in the fault log; the distribution substation is provided with a preset current ratio interval sigma 0 (sigma 1, sigma 2), wherein sigma 1 is the lowest current ratio, sigma 2 is the highest current ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment;
and if the sigma belongs to sigma 0 (sigma 1, sigma 2), the distribution substation further judges the similarity between the duration of the fault current exceeding the preset standard and the fault log record.
5. The automated system for community power distribution according to claim 4, wherein when the current ratio is in a preset interval, the power distribution substation calculates the ratio φ between the duration ta of the fault current exceeding the preset standard and the duration ta0 in the fault log, and sets φ to ta/ta0, the power distribution substation is provided with a preset overload current duration ratio interval φ 0(φ 1, φ 2), wherein φ 1 is the lowest duration ratio and φ 2 is the highest duration ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends the fault information to the power distribution master station, and the power distribution master station searches a master station database for further judgment;
if phi belongs to phi 0 (phi 1, phi 2), the distribution substation judges that the similarity between the fault and the record of the fault log is high and processes the fault in the same way as the solution plan in the fault log.
6. The automation system applied to community power distribution according to claim 3, wherein the power distribution substation is provided with a preset voltage standard value V0, the actual voltage is V when a fault occurs, the power distribution substation calculates the ratio B of V to V0, and sets B to V/V0; in the fault log of the distribution substation, a preset voltage standard value is Va0, the actual voltage when a fault occurs is Va, the distribution substation calculates the proportion Ba of Va0 and Va, and Ba is set to be Va/Va 0; when the fault occurs is voltage overload, the power distribution substation judges whether the situation is similar to the fault log according to the ratio of the actual voltage to the preset voltage in the fault log and the fault log; the distribution substation is provided with a preset voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), wherein epsilon 1 is the lowest voltage ratio, epsilon 2 is the highest voltage ratio,
if it is
The distribution substation judges that the similarity between the fault and the fault log record is low and sends fault informationSending the data to the power distribution master station, and searching the master station database by the power distribution master station for further judgment;
and if the epsilon belongs to epsilon 0 (epsilon 1, epsilon 2), the power distribution substation further judges the similarity between the duration of the fault voltage exceeding the preset standard and the fault log record.
7. The automated system for power distribution in cells of claim 6, wherein when the ratio of voltage ratios is within a preset interval, the substation calculates the ratio τ of duration tb after the fault voltage exceeds the preset standard to duration tb0 in the fault log, and sets τ tb/tb0, the substation has a preset overload voltage duration ratio interval τ 0(τ 1, τ 2), where τ 1 is the lowest duration ratio and τ 2 is the highest duration ratio,
if it is
The power distribution substation judges that the similarity between the fault and the fault log record is low and sends fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment;
if tau belongs to tau 0 (tau 1, tau 2), the distribution substation judges that the similarity of the fault and the record of the fault log is high and processes the fault in the same way as the solution plan in the fault log.
8. The automation system for community power distribution according to claim 3, wherein when the fault is overload current and voltage, the power distribution substation calculates the ratio of the actual current to the preset current, the ratio of the actual voltage to the preset voltage, and the ratio of the duration of the electrical parameter after exceeding the preset standard to the duration of the fault log to determine whether the fault is similar to the fault log, and when the duration ta of the fault current after exceeding the preset standard is greater than the duration tb of the fault voltage after exceeding the preset standard,
if the calculated current proportion value is located in a current proportion interval sigma 0 (sigma 1, sigma 2) and the voltage proportion value is located in a voltage proportion interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration proportion of the fault current after exceeding the preset standard is located in an overload current duration proportion interval phi 0 (phi 1, phi 2), the distribution substation judges that the similarity between the fault and the fault log record is high and selects the same mode as the solution plan in the fault log to process the fault;
if the calculated current ratio exceeds the current ratio range sigma 0 (sigma 1, sigma 2) or the voltage ratio exceeds the voltage ratio range epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the fault current exceeds the duration ratio range phi 0 (phi 1, phi 2) after the preset standard, the power distribution substation judges that the similarity of the fault and the fault log record is low and sends the fault information to the power distribution main station, and the power distribution main station searches the main station database for further judgment.
9. The automation system for distribution of electricity to a cell according to claim 8, characterised in that when the fault is a simultaneous overload of current and voltage and the duration tb after the voltage of the secondary fault exceeds the predetermined criterion is greater than the duration ta after the current of the secondary fault exceeds the predetermined criterion,
if the calculated current proportion value is in a current proportion interval sigma 0 (sigma 1, sigma 2) and the voltage proportion value is in a voltage proportion interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration proportion of the fault voltage after exceeding the preset standard is in an overload voltage duration proportion interval tau 0 (tau 1, tau 2), the distribution substation judges that the similarity between the fault and the fault log record is high and selects the same mode as the solution plan in the fault log to process the fault;
if the calculated current ratio exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the voltage ratio exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the fault voltage exceeds an overload voltage duration ratio interval tau 0 (tau 1, tau 2) after the fault voltage exceeds a preset standard, the power distribution substation judges that the similarity of the fault and the fault log record is low and sends the fault information to the power distribution main station, and the power distribution main station searches a main station database for further judgment.
10. The automation system applied to community power distribution according to claim 9, wherein if the similarity between the fault and the fault log is low, the power distribution substation sends the fault information to the power distribution main station, the power distribution main station searches the main station database, and determines whether similar conditions exist in the fault log in the same manner as the retrieval manner and determination criteria of the power distribution substation;
if the similar conditions exist, the power distribution master station judges that the fault reason is the same as the fault reason recorded in the fault log, and selects the mode the same as the solution plan in the fault log to process the fault;
and if the similar conditions do not exist, the power distribution main station sends the fault information to maintenance personnel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022102859885 | 2022-03-22 | ||
| CN202210285988 | 2022-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114938074A true CN114938074A (en) | 2022-08-23 |
| CN114938074B CN114938074B (en) | 2023-05-09 |
Family
ID=82866510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210661735.3A Active CN114938074B (en) | 2022-03-22 | 2022-06-11 | Automation system applied to district power distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114938074B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776283A (en) * | 2018-04-04 | 2018-11-09 | 国家电网公司 | A kind of CT not exclusively lower power distribution network single-phase disconnection fault judgment method of configuration with judge system |
| CN109459658A (en) * | 2018-10-29 | 2019-03-12 | 广西电网有限责任公司电力科学研究院 | A kind of method that distribution main website differentiates type feeder automation circuit fault section on the spot |
| JP2019049802A (en) * | 2017-09-08 | 2019-03-28 | 日本電気株式会社 | Failure analysis supporting device, incident managing system, failure analysis supporting method, and program |
| CN210806851U (en) * | 2019-11-18 | 2020-06-19 | 曲靖浩晨电力工程设计有限公司 | Automatic monitoring system of distribution network |
| CN112381668A (en) * | 2020-11-12 | 2021-02-19 | 国家电网公司华中分部 | Information extraction method for power grid faults |
| CN112713658A (en) * | 2020-12-30 | 2021-04-27 | 国网北京市电力公司 | Intelligent control method and system for monitoring defects of power grid equipment |
| JP2021091537A (en) * | 2019-12-12 | 2021-06-17 | 株式会社日立ビルシステム | Monitor center and elevator failure recovery assistance system |
| CN113609183A (en) * | 2021-07-12 | 2021-11-05 | 吕斌 | Method and system for studying and judging data acquisition fault in power distribution management |
-
2022
- 2022-06-11 CN CN202210661735.3A patent/CN114938074B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019049802A (en) * | 2017-09-08 | 2019-03-28 | 日本電気株式会社 | Failure analysis supporting device, incident managing system, failure analysis supporting method, and program |
| CN108776283A (en) * | 2018-04-04 | 2018-11-09 | 国家电网公司 | A kind of CT not exclusively lower power distribution network single-phase disconnection fault judgment method of configuration with judge system |
| CN109459658A (en) * | 2018-10-29 | 2019-03-12 | 广西电网有限责任公司电力科学研究院 | A kind of method that distribution main website differentiates type feeder automation circuit fault section on the spot |
| CN210806851U (en) * | 2019-11-18 | 2020-06-19 | 曲靖浩晨电力工程设计有限公司 | Automatic monitoring system of distribution network |
| JP2021091537A (en) * | 2019-12-12 | 2021-06-17 | 株式会社日立ビルシステム | Monitor center and elevator failure recovery assistance system |
| CN112381668A (en) * | 2020-11-12 | 2021-02-19 | 国家电网公司华中分部 | Information extraction method for power grid faults |
| CN112713658A (en) * | 2020-12-30 | 2021-04-27 | 国网北京市电力公司 | Intelligent control method and system for monitoring defects of power grid equipment |
| CN113609183A (en) * | 2021-07-12 | 2021-11-05 | 吕斌 | Method and system for studying and judging data acquisition fault in power distribution management |
Non-Patent Citations (3)
| Title |
|---|
| 乔骥 等: "面向电网调度故障处理的知识图谱框架与关键技术初探" * |
| 张命勇;: "故障自动检测技术在油田配电线路中的应用" * |
| 葛亮;谭志海;赵凤青;翁磊;董旭柱;: "一种改进型馈线自愈控制方案及实现" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114938074B (en) | 2023-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101232110B (en) | Method and apparatus for charging batteries | |
| CN201444191U (en) | Direct-current power supply online monitoring system | |
| CN101577438B (en) | Equipment for high-capacity back-up power maintenance based on remote monitoring platform | |
| CN109687590B (en) | Grading outage and restoration reporting method and system | |
| CN104157918A (en) | Method and device for performing redundant reassembling on storage batteries | |
| CN112349988B (en) | Vehicle storage battery online monitoring device and self-adaptive charging method | |
| CN112421615A (en) | Power distribution station self-healing control method and system based on intelligent breaker action | |
| CN106451770B (en) | One kind is based on the low fault-tolerant monitoring information interaction system of distribution system | |
| CN115051310A (en) | Intelligent power-off switch system and method for circuit fault analysis | |
| CN108599377B (en) | Monitoring method of 230M power negative control communication base station | |
| CN110601156A (en) | Master station centralized self-healing locking method based on remote sensing abnormity of distribution network terminal | |
| CN114938074A (en) | Automatic system applied to community power distribution | |
| CN115498739B (en) | Energy storage system and control method thereof | |
| CN111948575A (en) | Current transformer secondary side neutral line disconnection detection method and device | |
| CN111736096A (en) | Direct current switch cabinet frame insulation monitoring and positioning system | |
| CN114720902B (en) | Direct-current power supply fault rapid isolation system for transformer substation | |
| CN113839449A (en) | Safety control method and control system for energy storage system | |
| CN214375146U (en) | Drop-out fuse on-line monitoring terminal system | |
| CN112363085B (en) | PT broken line identification method and device for intelligent substation | |
| CN109301890B (en) | Voltage balancing method and system for storage battery pack of direct current system | |
| CN110931316A (en) | Intelligent circuit breaker | |
| CN111541284A (en) | Energy storage emergency power supply system using retired lithium battery and control method | |
| CN114563660B (en) | Power distribution network fault judgment method, device and management system | |
| CN220021238U (en) | Acid-free solid-state energy storage battery management system | |
| CN112636461B (en) | Remote restart method and system for fault recorder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230418 Address after: No. 288 Nanma Road, Longsha District, Qiqihar City, Heilongjiang Province, 161000 Applicant after: QIQIHAR POWER SUPPLY COMPANY OF STATE GRID HEILONGJIANG ELECTRIC POWER Co.,Ltd. Applicant after: STATE GRID CORPORATION OF CHINA Address before: No. 288 Nanma Road, Longsha District, Qiqihar City, Heilongjiang Province, 161000 Applicant before: QIQIHAR POWER SUPPLY COMPANY OF STATE GRID HEILONGJIANG ELECTRIC POWER Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |