CN114938074B - Automation system applied to district power distribution - Google Patents
Automation system applied to district power distribution Download PDFInfo
- Publication number
- CN114938074B CN114938074B CN202210661735.3A CN202210661735A CN114938074B CN 114938074 B CN114938074 B CN 114938074B CN 202210661735 A CN202210661735 A CN 202210661735A CN 114938074 B CN114938074 B CN 114938074B
- Authority
- CN
- China
- Prior art keywords
- fault
- power distribution
- ratio
- voltage
- current
- 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.)
- Active
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 power distribution automation, in particular to an automatic system applied to district power distribution, which comprises the following components: the power distribution main station is connected with a plurality of power distribution electronic stations, each power distribution electronic station is connected with a plurality of feeder terminals and is used for receiving monitoring data aiming at the running state of a circuit and sent by the feeder terminals, and each power distribution electronic station is provided with a substation database for storing the monitoring data and fault logs; when a power grid breaks down, the power distribution substation searches the substation database, judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the mode which is the same as the mode for solving the 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, the power distribution main station searches the main station database to further judge, remote maintenance and self-diagnosis functions are achieved, and the system solves the power grid faults.
Description
Technical Field
The invention relates to the technical field of power distribution automation, in particular to an automatic system applied to district power distribution.
Background
The distribution automation is based on informatization, integrates the online data and the offline data of the distribution system, the distribution network data and the user data, the power grid structure and the geographic graph to form a complete automation system, realizes the monitoring, protection and control of the distribution network and equipment thereof under normal operation and accident states and the automation of electricity consumption and distribution management, and finally realizes the online and quasi-real-time closed-loop control of the distribution system aiming at greatly improving the distribution reliability and the electric energy quality.
Chinese patent publication No.: CN 102306955B discloses a district distribution automation system, which comprises a server, wherein the server is provided with a distribution automation software system, the software system performs topology analysis on the line and provides fault processing strategies for staff; the topology analysis of the line comprises determining fault positions, listing switches of opening needed by fault isolation and listing switches of closing needed by fault recovery, and finally, the topology analysis is confirmed and executed by staff. It follows that the following problems exist: when the fault occurs, the staff is required to solve the fault, and the efficiency of solving the power grid fault is low.
Disclosure of Invention
Therefore, the invention provides an automatic system applied to district power distribution, which is used for solving the problem of low power grid fault efficiency in the prior art.
To achieve the above object, the present invention provides an automation system applied to cell power distribution, comprising:
the power distribution main station is connected with the plurality of power distribution electronic stations and is used for monitoring, remotely controlling and interacting with a human-computer system on the running state of the circuit in the radiation range; a master station database is arranged in the power distribution master station and used for storing monitoring data and fault logs sent by the power distribution substation;
each distribution electronic station is connected with a plurality of feeder terminals and is used for receiving monitoring data aiming at the running state of the circuit and sent by the feeder terminals, and each distribution electronic station is internally provided with a sub-station database for storing the monitoring data and fault logs; when a power grid fails, the power distribution substation searches the substation database, judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the mode which is the same as the mode for solving the plan in the fault log to process the secondary 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 searches the main station database to further judge;
the feeder terminal is used for collecting power grid data, monitoring the power grid in real time, opening a switch when a circuit fails and sending power parameter information obtained when the circuit fails to a power distribution substation connected with the power distribution substation.
Further, 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 fails, the feeder terminal firstly opens the switch, and in the opening process, the feeder terminal sends fault information to the power distribution substation, the power distribution substation judges the type of the fault and calculates the ratio of various electrical parameters to judge whether similar conditions exist in the fault log,
if the similar situation exists, the auxiliary electronic station selects the mode which is the same as the mode for solving the plan in the fault log to process the secondary fault;
if the similar situation does not exist, the power distribution substation sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
Further, the power distribution substation classifies the case of failure as:
when the current overload fault occurs, the power distribution substation records an actual current value I and a duration ta after the actual current exceeds a preset standard;
when the voltage overload fault occurs, the power distribution substation records an actual voltage value V and a duration tb after the actual voltage exceeds a preset standard;
when the current and the voltage are overloaded and overload faults occur at the same time, the power distribution substation records an actual current value I, an actual voltage value V and one of a duration ta after the actual current exceeds a preset standard and a duration tb after the actual voltage exceeds the preset standard, wherein the value is larger.
Further, the power distribution substation is provided with a preset current standard value I0, the actual current is I when a fault occurs, the power distribution substation calculates the proportion A of I to I0, and A=I/I0 is set; in the fault log of the power distribution substation, a preset current standard value is Ia0, the actual current is Ia when a fault occurs, the power distribution substation calculates the ratio Aa of Ia0 to Ia, and aa=Ia/Ia 0 is set; after the power distribution substation obtains A and Aa, calculating the ratio sigma of A and Aa, setting sigma=A/Aa, and when the fault is current overload, judging whether the fault is similar to the fault log or not according to the ratio of the actual current to the preset current in the fault log; the power 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 to further judge;
if σ epsilon σ0 (σ1, σ2), the power distribution substation further determines a similarity between the duration of the secondary fault current exceeding a preset standard and the fault log record.
Further, when the current proportion ratio is in a preset interval, the power distribution substation calculates the ratio phi of the duration ta of the fault current exceeding a preset standard to the duration ta0 in the fault log, phi = ta/ta0 is set, the power distribution substation is provided with a preset overload current duration ratio interval phi 0 (phi 1, phi 2), wherein phi 1 is the lowest duration ratio, phi 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 to further judge;
if phi epsilon phi 0 (phi 1, phi 2), the power distribution substation determines that the secondary fault has high similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault.
Further, 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 proportion B of V to V0, and B=V/V0 is set; in a fault log of the power distribution substation, a preset voltage standard value is Va0, actual voltage is Va when a fault occurs, the power distribution substation calculates a ratio Ba of Va0 and Va, and Ba=Va/Va 0 is set; after the distribution substation obtains B and Ba, calculating epsilon of the ratio of B to Ba, setting epsilon=B/Ba, and when the fault is voltage overload, judging whether the fault log is similar to the actual voltage in the fault log or not according to the ratio of the actual voltage to the preset voltage in the fault log; the power 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 to further judge; />
If epsilon 0 (epsilon 1, epsilon 2), the power distribution substation further judges the similarity between the duration time and fault log record after the voltage of the secondary fault exceeds a preset standard.
Further, when the voltage ratio is in the preset interval, the power distribution substation calculates the ratio τ of the duration tb of the fault voltage exceeding the preset standard to the duration tb0 in the fault log, and sets τ=tb/tb 0, and the power distribution substation is provided with a preset overload voltage duration ratio interval τ0 (τ1, τ2), where τ1 is the lowest duration ratio, τ2 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 to further judge;
if tau epsilon tau 0 (tau 1, tau 2), the distribution substation determines that the secondary fault has high similarity to the fault log record and selects the same way as the solution in the fault log to handle the secondary fault.
Further, when the fault is overload of current and voltage at the same time, the power distribution substation calculates the ratio of the actual current to the preset current in the fault log, the ratio of the actual voltage to the preset voltage and the ratio of the duration time after the electric parameter exceeds the preset standard to the duration time in the fault log to judge whether the fault is similar to the fault log,
when the duration ta after the sub-fault current exceeds the preset standard is greater than the duration tb after the sub-fault voltage exceeds the preset standard,
if the calculated ratio of the currents is in a current ratio interval sigma 0 (sigma 1, sigma 2) and the ratio of the voltages is in a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration ratio of the secondary fault current exceeding a preset standard is in an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault is high in similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault;
if the calculated ratio of the currents exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the ratio of the voltages exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the secondary fault current exceeds a preset standard exceeds an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault is low in similarity with fault log records and sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
Further, when the fault is that the current and the voltage are simultaneously overloaded and the duration tb after the voltage of the secondary fault exceeds the preset standard is greater than the duration ta after the current of the secondary fault exceeds the preset standard,
if the calculated ratio of the currents is in a current ratio interval sigma 0 (sigma 1, sigma 2) and the ratio of the voltages is in a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration ratio of the secondary fault voltage exceeding a preset standard is in an overload voltage duration ratio interval tau 0 (tau 1, tau 2), the power distribution substation judges that the secondary fault has high similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault;
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 duration ratio of the secondary fault voltage exceeds a preset standard exceeds an overload voltage duration ratio interval tau 0 (tau 1, tau 2), the power distribution substation judges that the secondary fault is low in similarity with fault log records and sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
Further, if the similarity between the secondary fault and the fault log is low, the power distribution substation sends fault information to the power distribution main station, the power distribution main station searches a main station database, and whether the fault log has similar conditions is judged in the same mode as the searching mode and the judging standard of the power distribution substation;
if similar conditions exist, the distribution master station judges that the reason of the secondary fault is the same as the reason of the fault recorded in the fault log, and selects the mode which is the same as the solution scheme in the fault log to process the secondary fault;
if no similar condition exists, the power distribution master station sends fault information to maintenance personnel.
Compared with the prior art, the power distribution substation has the beneficial effects that when the power distribution substation breaks down, the substation database is searched, 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 which is the same as the mode for solving the scheme in the fault log to process the fault, the remote maintenance and self-diagnosis functions are realized, and the power grid fault solving efficiency of the system is improved.
Furthermore, when the power distribution substation judges that the faults of the power grid are similar to the fault logs in the substation database, the fault information is sent to the power distribution main station, and the power distribution main station searches the main station database to further judge.
Further, the power distribution main station searches the main station database, judges whether the fault log has similar conditions according to the monitoring data, and if the fault log has similar conditions, the power distribution main station selects the mode which is the same as the mode for solving the plan in the fault log to process the fault, thereby realizing remote maintenance and self-diagnosis functions and improving the solving efficiency of the system for the power grid faults.
Further, 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 electric parameter exceeding the preset time, so that the accuracy of judging the power grid fault by the system is improved.
Drawings
Fig. 1 is a block diagram of an automation system for cell distribution according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of 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 merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a block diagram of an automation system for cell power distribution according to the present invention includes:
the power distribution main station is connected with the plurality of power distribution electronic stations and is used for monitoring, remotely controlling and interacting with a human-computer system on the running state of the circuit in the radiation range; a master station database is arranged in the power distribution master station and used for storing monitoring data and fault logs sent by the power distribution substation;
each distribution electronic station is connected with a plurality of feeder terminals and is used for receiving monitoring data aiming at the running state of the circuit and sent by the feeder terminals, and each distribution electronic station is internally provided with a sub-station database for storing the monitoring data and fault logs; when a power grid fails, the power distribution substation searches the substation database, judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the mode which is the same as the mode for solving the plan in the fault log to process the secondary 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 searches the main station database to further judge;
the feeder terminal is used for collecting power grid data, monitoring the power grid in real time, opening a switch when a circuit fails and sending power parameter information obtained when the circuit fails to a power distribution substation connected with the power distribution substation.
Specifically, the fault log includes a power-off duration T, various electrical parameter information during power-off, a power-off reason remark, 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 fails, the feeder terminal firstly opens the switch, and in the opening process, the feeder terminal sends fault information to the power distribution substation, the power distribution substation judges the type of the fault and calculates the ratio of various electrical parameters to judge whether similar conditions exist in the fault log,
if the similar situation exists, the auxiliary electronic station selects the mode which is the same as the mode for solving the plan in the fault log to process the secondary fault;
if the similar situation does not exist, the power distribution substation sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
According to the embodiment, when the power distribution substation breaks down in the power grid, the substation database is searched, whether the similar situation exists in the fault log is judged according to the monitoring data, and if the similar situation exists, the power distribution substation selects the mode which is the same as the mode for solving the scheme in the fault log to process the fault, so that the remote maintenance and self-diagnosis functions are realized, and the power grid fault solving efficiency of the system is improved.
When the power distribution substation judges that the faults of the power grid are similar to the fault logs in the substation database, fault information is sent to the power distribution main station, and the power distribution main station searches the main station database to further judge.
In particular, the distribution substation classifies the case of failure into:
when the current overload fault occurs, the power distribution substation records an actual current value I and a duration ta after the actual current exceeds a preset standard;
when the voltage overload fault occurs, the power distribution substation records an actual voltage value V and a duration tb after the actual voltage exceeds a preset standard;
when the current and the voltage are overloaded and overload faults occur at the same time, the power distribution substation records an actual current value I, an actual voltage value V and one of a duration ta after the actual current exceeds a preset standard and a duration tb after the actual voltage exceeds the preset standard, wherein the value is larger.
Specifically, the power distribution substation is provided with a preset current standard value I0, the actual current is I when a fault occurs, the power distribution substation calculates the proportion A of I to I0, and A=I/I0 is set; in the fault log of the power distribution substation, a preset current standard value is Ia0, the actual current is Ia when a fault occurs, the power distribution substation calculates the ratio Aa of Ia0 to Ia, and aa=Ia/Ia 0 is set; after the power distribution substation obtains A and Aa, calculating the ratio sigma of A and Aa, setting sigma=A/Aa, and when the fault is current overload, judging whether the fault is similar to the fault log or not according to the ratio of the actual current to the preset current in the fault log; the power 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 to further judge;
if σ epsilon σ0 (σ1, σ2), the power distribution substation further determines a similarity between the duration of the secondary fault current exceeding a preset standard and the fault log record.
Specifically, when the current proportion ratio is in a preset interval, the power distribution substation calculates the ratio phi of the duration ta of the fault current exceeding a preset standard to the duration ta0 in the fault log, phi = ta/ta0 is set, the power distribution substation is provided with a preset overload current duration ratio interval phi 0 (phi 1, phi 2), wherein phi 1 is the lowest duration ratio, phi 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 to further judge;
if phi epsilon phi 0 (phi 1, phi 2), the power distribution substation determines that the secondary fault has high similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault.
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 proportion B of V to V0, and b=v/V0 is set; in a fault log of the power distribution substation, a preset voltage standard value is Va0, actual voltage is Va when a fault occurs, the power distribution substation calculates a ratio Ba of Va0 and Va, and Ba=Va/Va 0 is set; after the distribution substation obtains B and Ba, calculating epsilon of the ratio of B to Ba, setting epsilon=B/Ba, and when the fault is voltage overload, judging whether the fault log is similar to the actual voltage in the fault log or not according to the ratio of the actual voltage to the preset voltage in the fault log; the power 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 to further judge;
if epsilon 0 (epsilon 1, epsilon 2), the power distribution substation further judges the similarity between the duration time and fault log record after the voltage of the secondary fault exceeds a preset standard.
Specifically, when the voltage ratio is in a preset interval, the power distribution substation calculates a ratio τ of duration tb of the fault voltage exceeding a preset standard to duration tb0 in the fault log, and sets τ=tb/tb 0, and the power distribution substation is provided with a preset overload voltage duration ratio interval τ0 (τ1, τ2), where τ1 is a lowest duration ratio, τ2 is a highest duration ratio,
if it is
The distribution substation judges that the secondary fault has low similarity with the fault log record and sends fault information to the distribution mainThe station, the distribution master station searches the master station database to make further judgment;
if tau epsilon tau 0 (tau 1, tau 2), the distribution substation determines that the secondary fault has high similarity to the fault log record and selects the same way as the solution in the fault log to handle the secondary fault.
Specifically, when the fault is overload of current and voltage at the same time, the power distribution substation calculates the ratio of the actual current to the preset current in the fault log, the ratio of the actual voltage to the preset voltage, and the ratio of the duration after the electric 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 ratio of the currents is in a current ratio interval sigma 0 (sigma 1, sigma 2) and the ratio of the voltages is in a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration ratio of the secondary fault current exceeding a preset standard is in an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault is high in similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault;
if the calculated ratio of the currents exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the ratio of the voltages exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the secondary fault current exceeds a preset standard exceeds an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault is low in similarity with fault log records and sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
In particular, when the fault occurs in which the current and the voltage are simultaneously overloaded and the duration tb after the sub-fault voltage exceeds the preset criterion is greater than the duration ta after the sub-fault current exceeds the preset criterion,
if the calculated ratio of the currents is in a current ratio interval sigma 0 (sigma 1, sigma 2) and the ratio of the voltages is in a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration ratio of the secondary fault voltage exceeding a preset standard is in an overload voltage duration ratio interval tau 0 (tau 1, tau 2), the power distribution substation judges that the secondary fault has high similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault;
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 duration ratio of the secondary fault voltage exceeds a preset standard exceeds an overload voltage duration ratio interval tau 0 (tau 1, tau 2), the power distribution substation judges that the secondary fault is low in similarity with fault log records and sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
Specifically, if the similarity between the secondary fault and the fault log is low, the power distribution substation sends fault information to the power distribution main station, the power distribution main station searches a main station database, and whether the fault log has similar conditions is judged in the same mode as the searching mode and the judging standard of the power distribution substation;
if similar conditions exist, the distribution master station judges that the reason of the secondary fault is the same as the reason of the fault recorded in the fault log, and selects the mode which is the same as the solution scheme in the fault log to process the secondary fault;
if no similar condition exists, the power distribution master station sends fault information to maintenance personnel.
According to the power distribution substation, whether the fault is similar to the fault log or not is determined according to the fault type and the time length of the electric parameter exceeding the preset time, and the accuracy of judging the power grid fault by the system is improved.
According to the power distribution main station, the power distribution main station searches the main station database, judges whether the similar situation exists in the fault log according to the monitoring data, and if the similar situation exists, the power distribution main station processes the fault in the same mode as the solution scheme in the fault log, so that the remote maintenance and self-diagnosis functions are realized, and the power grid fault solving efficiency of the system is improved.
Thus far, the technical solution of the present invention has 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 protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An automated system for use in cell power distribution, comprising:
the power distribution main station is connected with the plurality of power distribution electronic stations and is used for monitoring, remotely controlling and interacting with a human-computer system on the running state of the circuit in the radiation range; a master station database is arranged in the power distribution master station and used for storing monitoring data and fault logs sent by the power distribution substation;
each distribution electronic station is connected with a plurality of feeder terminals and is used for receiving monitoring data aiming at the running state of the circuit and sent by the feeder terminals, and each distribution electronic station is internally provided with a sub-station database for storing the monitoring data and fault logs; when a power grid fails, the power distribution substation searches the substation database, judges whether similar conditions exist in a fault log according to monitoring data, if the similar conditions exist, the power distribution substation selects the mode which is the same as the mode for solving the plan in the fault log to process the secondary 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 searches the main station database to further judge;
the feeder terminal is used for collecting power grid data, monitoring the power grid in real time, switching off a switch when a circuit fails and sending power parameter information obtained when the circuit fails to a power distribution substation connected with the power distribution substation;
the power distribution substation is provided with a preset current standard value I0, the actual current is I when a fault occurs, the power distribution substation calculates the proportion A of I to I0, and A=I/I0 is set; in the fault log of the power distribution substation, a preset current standard value is Ia0, the actual current is Ia when a fault occurs, the power distribution substation calculates the ratio Aa of Ia0 to Ia, and aa=Ia/Ia 0 is set; after the power distribution substation obtains A and Aa, calculating the ratio sigma of A and Aa, setting sigma=A/Aa, and when the fault is current overload, judging whether the fault is similar to the fault log or not according to the ratio of the actual current to the preset current in the fault log; the power 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 sigma ∉ sigma 0 (sigma 1, sigma 2), 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 to further judge;
if sigma epsilon sigma 0 (sigma 1, sigma 2), the power distribution substation further judges the similarity between the duration time of the secondary fault current exceeding a preset standard and fault log records;
when the current proportion ratio is in a preset interval, the power distribution substation calculates the ratio phi of the duration ta of the fault current exceeding a preset standard to the duration ta0 in the fault log, phi = ta/ta0 is set, the power distribution substation is provided with a preset overload current duration ratio interval phi 0 (phi 1, phi 2), wherein phi 1 is the lowest duration ratio, phi 2 is the highest duration ratio,
if phi ∉ phi 0 (phi 1, phi 2), 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 to further judge;
if phi is E phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault has high similarity with the fault log record and selects the mode which is the same as the solution scheme in the fault log to process the secondary fault;
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 proportion B of V to V0, and B=V/V0 is set; in a fault log of the power distribution substation, a preset voltage standard value is Va0, actual voltage is Va when a fault occurs, the power distribution substation calculates a ratio Ba of Va0 and Va, and Ba=Va/Va 0 is set; after the distribution substation obtains B and Ba, calculating epsilon of the ratio of B to Ba, setting epsilon=B/Ba, and when the fault is voltage overload, judging whether the fault log is similar to the actual voltage in the fault log or not according to the ratio of the actual voltage to the preset voltage in the fault log; the power 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 epsilon ∉ epsilon 0 (epsilon 1, epsilon 2), 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 to further judge;
if epsilon 0 (epsilon 1, epsilon 2), the power distribution substation further judges the similarity between the duration time of the fault voltage exceeding a preset standard and the fault log record;
when the voltage proportion ratio is in a preset interval, the power distribution substation calculates the ratio tau of the duration tb of the secondary fault voltage exceeding a preset standard to the duration tb0 in the fault log, and sets tau=tb/tb 0, the power distribution substation is provided with a preset overload voltage duration ratio interval tau 0 (tau 1, tau 2), wherein tau 1 is the lowest duration ratio, tau 2 is the highest duration ratio,
if tau ∉ tau 0 (tau 1, tau 2), 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 to further judge;
if tau epsilon tau 0 (tau 1, tau 2), the distribution substation determines that the secondary fault has high similarity to the fault log record and selects the same way as the solution in the fault log to handle the secondary fault.
2. The automated system for cell 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 standard, and duration tb after the voltage exceeds a preset standard; when the circuit fails, the feeder terminal firstly opens the switch, and in the opening process, the feeder terminal sends fault information to the power distribution substation, the power distribution substation judges the type of the fault and calculates the ratio of various electrical parameters to judge whether similar conditions exist in the fault log,
if the similar situation exists, the auxiliary electronic station selects the mode which is the same as the mode for solving the plan in the fault log to process the secondary fault;
if the similar situation does not exist, the power distribution substation sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
3. The automated system for application to cell power distribution of claim 2, wherein the power distribution substation classifies a failure condition as:
when the current overload fault occurs, the power distribution substation records an actual current value I and a duration ta after the actual current exceeds a preset standard;
when the voltage overload fault occurs, the power distribution substation records an actual voltage value V and a duration tb after the actual voltage exceeds a preset standard;
when the current and the voltage are overloaded and overload faults occur at the same time, the power distribution substation records an actual current value I, an actual voltage value V and one of a duration ta after the actual current exceeds a preset standard and a duration tb after the actual voltage exceeds the preset standard, wherein the value is larger.
4. The automated system for cell distribution according to claim 3, wherein when the fault is overload of current and voltage at the same time, the power distribution substation calculates a ratio of actual current to preset current, a ratio of actual voltage to preset voltage, and a ratio of a duration after the electrical parameter exceeds a preset standard to a 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 ratio of the currents is in a current ratio interval sigma 0 (sigma 1, sigma 2) and the ratio of the voltages is in a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration ratio of the secondary fault current exceeding a preset standard is in an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault is high in similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault;
if the calculated ratio of the currents exceeds a current ratio interval sigma 0 (sigma 1, sigma 2) or the ratio of the voltages exceeds a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2) or the duration ratio of the secondary fault current exceeds a preset standard exceeds an overload current duration ratio interval phi 0 (phi 1, phi 2), the power distribution substation judges that the secondary fault is low in similarity with fault log records and sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
5. The automated system for cell power distribution according to claim 4, wherein when the fault is current and voltage overload at the same time and the duration tb after the secondary fault voltage exceeds a preset standard is greater than the duration ta after the secondary fault current exceeds the preset standard,
if the calculated ratio of the currents is in a current ratio interval sigma 0 (sigma 1, sigma 2) and the ratio of the voltages is in a voltage ratio interval epsilon 0 (epsilon 1, epsilon 2), and meanwhile, when the duration ratio of the secondary fault voltage exceeding a preset standard is in an overload voltage duration ratio interval tau 0 (tau 1, tau 2), the power distribution substation judges that the secondary fault has high similarity with the fault log record and selects the same mode as the solution scheme in the fault log to process the secondary fault;
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 duration ratio of the secondary fault voltage exceeds a preset standard exceeds an overload voltage duration ratio interval tau 0 (tau 1, tau 2), the power distribution substation judges that the secondary fault is low in similarity with fault log records and sends fault information to the power distribution main station, and the power distribution main station searches a main station database to further judge.
6. The automated system for district power distribution according to claim 5 wherein if the secondary fault has low similarity to the fault log, the power distribution substation sends fault information to the power distribution substation, the power distribution substation retrieves the master station database, and determines whether a similar condition exists in the fault log in the same manner as the retrieval manner and the determination criteria of the power distribution substation;
if similar conditions exist, the distribution master station judges that the reason of the secondary fault is the same as the reason of the fault recorded in the fault log, and selects the mode which is the same as the solution scheme in the fault log to process the secondary fault;
if no similar condition exists, the power distribution master station sends 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 CN114938074A (en) | 2022-08-23 |
| CN114938074B true 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 (2)
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6919438B2 (en) * | 2017-09-08 | 2021-08-18 | 日本電気株式会社 | Fault analysis support device, incident management system, fault analysis support 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 |
| JP7244406B2 (en) * | 2019-12-12 | 2023-03-22 | 株式会社日立ビルシステム | Monitoring center and elevator failure recovery support system |
| CN112381668B (en) * | 2020-11-12 | 2022-12-02 | 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 |
-
2022
- 2022-06-11 CN CN202210661735.3A patent/CN114938074B/en active Active
Patent Citations (2)
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 张命勇 ; .故障自动检测技术在油田配电线路中的应用.油气田地面工程.2018,(08),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114938074A (en) | 2022-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110794299A (en) | Fault online monitoring method and system of circuit breaker | |
| CN102684308A (en) | Superconducting state information-based power distribution network self-healing system and method | |
| CN108701871A (en) | Accumulator plant, the control method of accumulator plant and program | |
| CN115333247A (en) | Energy storage battery system and safety control method | |
| CN108599377B (en) | Monitoring method of 230M power negative control communication base station | |
| CN114938074B (en) | Automation system applied to district power distribution | |
| CN207459110U (en) | Accumulator group surveys protection device | |
| CN111555279A (en) | Method for maintaining power utilization continuity based on intelligent unloading of three-level load | |
| CN112462250A (en) | Switching characteristic comprehensive test device | |
| CN114720902B (en) | Direct-current power supply fault rapid isolation system for transformer substation | |
| CN212008841U (en) | Fault on-line monitoring system of circuit breaker | |
| CN109861179B (en) | Bus protection voltage switching method suitable for hand-in-hand power supply mode | |
| CN116627080B (en) | Digital intelligent control system suitable for operation of molded case circuit breaker | |
| CN111509679A (en) | Cloud computing distribution network level difference protection system and method based on 5G | |
| CN111211542A (en) | Fusion type power transmission line fault isolation method | |
| CN109787327A (en) | A kind of lithium ionic cell module management circuit | |
| CN110579691A (en) | Storage battery pack insulation descending positioning monitoring device and method | |
| CN219999075U (en) | Energy storage device | |
| CN114899944B (en) | Communication management machine | |
| CN109687406B (en) | Working method of three-level boundary breaker structure distribution network line isolation fault system | |
| CN214953952U (en) | Capacitor power-taking switch with fault diagnosis function | |
| CN114167193B (en) | Self-diagnosis method for AC/DC screen | |
| CN210074879U (en) | Intelligent monitoring system capable of quickly searching line fault | |
| CN113690834A (en) | Overlapping type feeder automation line short circuit fault interval detection system on spot | |
| KR20160122349A (en) | Limited fault current energy storage system in power grid |
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 |