CN114268083B - Power restoration method and device, electronic equipment and storage medium - Google Patents
Power restoration method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a power restoration method, a device, electronic equipment and a storage medium, wherein the method comprises the following steps: s1, acquiring fault equipment information and positioning information of the fault equipment, S2, performing spare power automatic switching simulation by combining a preset spare power automatic switching simulation model based on the fault equipment information and the positioning information to obtain power supply running state information of voltage-losing equipment in a bus power supply range, S3, performing load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of stable equipment, S4, obtaining cut-off line information according to a stability configuration information table and the load data, and S5, combining a power grid running structure based on the load data and the cut-off line information to recover power supply. The invention provides a power restoration method, which improves the power restoration efficiency.
Description
Technical Field
The present invention relates to the field of power restoration technologies, and in particular, to a power restoration method, a device, an electronic apparatus, and a storage medium.
Background
The simulation of the fault process of the key elements of the power grid, the simulation deduction of the consequences and the calculation of the optimal recovery scheme of the power grid are one of the key problems of constructing a digital twin power grid and improving the power grid analysis and accident emergency handling capacity. At present, related patents of equipment fault result risk analysis and accident re-electricity optimal path analysis exist, so that single equipment fault result analysis can be realized, and calculation of a possible re-electricity scheme under a given fault operation mode can be realized.
At present, the existing simulation key equipment fault analysis method has the following defects: 1) The types and the quantity of the key equipment are fixed, the faults of equipment with higher voltage grades cannot be simulated, and complex fault simulation (fault equipment is more than 2) cannot be performed due to the fixed quantity; 2) The automatic switching analysis of the power grid does not have the analysis capability of the influence of the automatic switching on the power grid after successful execution; 3) The analysis processing time is longer. The analysis object in the existing power grid optimal complex electric path analysis method is a voltage-loss bus; and only providing an optimal complex electric channel under a setting strategy aiming at the voltage-losing bus.
Therefore, in order to improve the efficiency of recovering power, it is necessary to construct a method for recovering power to solve the technical problem that the existing method for recovering power is low in efficiency.
Disclosure of Invention
The invention provides a power restoration method, a device, electronic equipment and a storage medium, which solve the technical problem that the existing power restoration method is low in efficiency.
In a first aspect, the present invention provides a method for restoring power, comprising:
s1, acquiring fault equipment information and positioning information of the fault equipment;
S2, based on the fault equipment information and the positioning information, carrying out spare power automatic switching simulation by combining a preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-losing equipment in a bus power supply range;
s3, carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of the stable equipment;
S4, obtaining cut-off line information according to the stability configuration information table and the load data;
S5, based on the load data and the cut-off line information, combining a power grid operation structure to restore power supply.
Optionally, the step of constructing the spare power automatic switching simulation model includes:
acquiring line information and switching information of each side of the line;
And constructing the spare power automatic switching simulation model based on the line information and the switch information of each side of the line.
Optionally, the step S2 includes:
s21, carrying out power grid self-healing simulation analysis based on the fault equipment information and the positioning information to obtain voltage loss equipment information and suspected voltage loss equipment information;
S22, performing spare power automatic switching simulation according to the suspected voltage-loss equipment information, the voltage-loss equipment information and the preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-loss equipment in a bus power supply range.
Optionally, the step S21 includes:
s211, extracting suspected voltage-loss equipment information from an equipment table based on the fault equipment information and the positioning information;
s212, determining the fault equipment as the voltage-loss equipment, and obtaining the information of the voltage-loss equipment.
Optionally, the step S22 includes:
S221, performing spare power automatic switching analysis on any one of the voltage-losing buses in the suspected voltage-losing equipment information based on the voltage-losing equipment information and the preset spare power automatic switching simulation model to obtain bus information for recovering power supply;
S222, acquiring power supply operation state information of the voltage-losing equipment in the bus power supply range corresponding to the bus information.
Optionally, the step S221 includes:
S2211, judging whether any of the voltage-losing buses is a protected bus or not according to a spare power automatic switching configuration table; if not, another voltage-losing bus is reselected, and the step S2211 is executed on the another voltage-losing bus;
S2212, judging whether any of the voltage-loss buses meets the precondition of automatic backup power switching or not; if not, another voltage-losing bus is reselected, and the step S2211 is executed on the another voltage-losing bus;
s2213, performing power grid running state simulation according to the spare power automatic switching simulation type to obtain the bus information for recovering power supply.
Optionally, the step S2213 includes:
S22131, performing running state simulation according to the spare power automatic switching simulation type to obtain bus information of primary recovery power supply;
s22132, sequentially recovering power supply to the external direction of the station according to the original power supply path until all the buses corresponding to the bus information of the primary recovery power supply recover power supply;
S22133, judging whether the quantity of the equipment in the bus power supply range corresponding to the bus information of any primary recovery power supply or the equipment corresponding to the voltage-loss equipment information is changed or not when the power supply is recovered; if yes, another voltage-losing bus is reselected, and the step S2211 is executed on the another voltage-losing bus; if not, the method comprises the steps of; and determining the bus information of the primary power restoration as the bus information of the power restoration.
Optionally, the step S4 includes:
s41, judging whether the load data is larger than a control value according to the stability configuration information table; if yes, extracting current round of tangent line information from the stable configuration information table to serve as the cut-off line information; if not, taking the first cutting round line information as the cutting line information;
And S42, when the cutting line information contains the tangent line, adding the equipment information to be stably controlled and the current round tangent line information to the cutting line information.
Optionally, the step S5 includes:
S51, carrying out bus duplicate path search according to the voltage level and based on the load data, the cut-off line information and the power grid operation structure to obtain path information of bus restoration power supply;
and S52, carrying out power restoration according to the path information.
Optionally, after the step S5, the method further includes:
S6, calculating switching load data or main transformer load data after power supply restoration, and determining whether the load condition after power supply restoration is normal according to the switching load data or the main transformer load data after power supply restoration.
In a second aspect, the present invention provides a power restoration device comprising:
the acquisition module is used for acquiring fault equipment information and positioning information of the fault equipment;
The simulation module is used for carrying out spare power automatic switching simulation by combining a preset spare power automatic switching simulation model based on the fault equipment information and the positioning information to obtain power supply running state information of the voltage-losing equipment in a bus power supply range;
The load module is used for carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of the stable equipment;
The circuit module is used for obtaining cut-off circuit information according to the stability configuration information table and the load data;
And the power supply module is used for restoring power supply based on the load data and the cut-off line information by combining a power grid operation structure.
In a third aspect, the application provides an electronic device comprising a processor and a memory storing computer readable instructions which, when executed by the processor, perform the steps of the method as provided in the first aspect above.
In a fourth aspect, the present application provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as provided in the first aspect above.
From the above technical scheme, the invention has the following advantages: the invention provides a power restoration method, which comprises the steps of S1, obtaining fault equipment information and positioning information of the fault equipment, S2, carrying out spare power automatic switching simulation by combining a preset spare power automatic switching simulation model based on the fault equipment information and the positioning information to obtain power supply running state information of voltage-losing equipment in a bus power supply range, S3, carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of stable equipment, S4, obtaining cut-off line information according to a stable configuration information table and the load data, and S5, restoring power supply by combining a power grid running structure based on the load data and the cut-off line information, and solving the technical problem that the existing power restoration method is low in efficiency at present by the aid of the power restoration method.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flowchart showing a method for recovering power according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a method for recovering power according to the present invention;
fig. 3 is a block diagram of an embodiment of a power restoration device according to the present invention.
Detailed Description
The embodiment of the invention provides a power restoration method, a device, electronic equipment and a storage medium, which are used for solving the technical problem that the existing power restoration method is low in efficiency.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart of a power restoration method according to a first embodiment of the present invention, including:
Step S101, obtaining fault equipment information and positioning information of the fault equipment;
step S102, based on the fault equipment information and the positioning information, carrying out spare power automatic switching simulation by combining a preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-losing equipment in a bus power supply range;
The operation state data includes load data, switch opening and closing data, current data, and the like.
The spare power automatic switching simulation model comprises a 220kV spare power automatic switching simulation model, a 110kV spare power automatic switching simulation model, a 10kV spare power automatic switching simulation model, a 110kV longitudinal spare power automatic switching simulation model and a main board spare power automatic switching simulation model.
220KV spare power automatic switching simulation model construction process:
1. Any 220kV spare power automatic switching configuration information is acquired, and any 220kV spare power automatic switching configuration information is acquired from system maintenance data.
2. And acquiring any section of 220kV bus of the transformer substation, and acquiring the transformer substation name in the configuration information.
3. Judging whether the configuration information is correct, combining the opening and closing states of the switch and the disconnecting link, carrying out topology searching on the bus and each line from the 220kV bus to obtain a line with negative active load and a sectionalized or bus-connected switch, judging whether the paired lines or the bus-connected switch in the configuration information can be searched by the bus, and if so, configuring correctly.
4. And saving the reorganization information.
The construction process of the 110kV spare power automatic switching simulation model comprises the following steps:
1. And acquiring 110kV buses of any 110kV transformer substation, and acquiring 110kV bus information of any 110kV transformer substation from a primary account table of system equipment.
2. And carrying out equipment searching from the bus to a 110kV bus or a line in the station by combining the switch state to obtain a line switch or a sectioning/bus-bar switch with negative active load.
3. And storing the line spare power automatic switching model data, and storing a line switch, an disconnected line switch or a bus or sectional switch which is active as a negative line switch.
The 10kV spare power automatic switching simulation model construction process comprises the following steps:
1. Any main transformer is obtained, and any type of equipment which is the main transformer is obtained from the primary equipment information table.
2. The main change side is searched, the main change edge side is searched, equipment searching is performed on the main change side, the main change edge side is used for searching equipment on a main change switch, a bus, a section, a bus and a feeder line, and if a branch meets the section or the bus, the equipment searching is stopped.
3. And storing 10kV sectional spare power automatic switching information and storing sectional switch information of the main transformer to be low and disconnected.
The construction process of the 110kV longitudinal automatic switching simulation model comprises the following steps:
1. any longitudinal automatic switching configuration information is obtained, and any longitudinal automatic switching configuration information is obtained in a system maintenance table.
2. And acquiring the transformer substation name in the configuration information, and simultaneously configuring the spare power automatic switching models in the group of stations obtained by the simulation of the spare power automatic switching of the 110kV line.
3. And saving the automatic switching information of the longitudinal standby power.
The construction process of the main board spare power automatic switching simulation model comprises the following steps:
1. Any main-transformer spare power automatic switching information is obtained, and main-transformer spare power automatic switching configuration information is obtained from a system maintenance table.
2. And obtaining the switch information of each side of each main transformer in the group, and starting to search equipment from the main transformer body to the high side and the low side respectively to obtain the high switch and the low switch.
3. And storing the configuration information of the main transformer spare power automatic switching, and configuring each side closing switch of any main transformer in the group and the rest main transformer opening switches in the group.
Step S103, carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of stable equipment;
Step S104, obtaining cut-off line information according to the stability configuration information table and the load data;
And step S105, based on the load data and the cut-off line information, combining a power grid operation structure to restore power supply.
According to the power restoration method provided by the embodiment of the invention, through S101, fault equipment information and positioning information of the fault equipment are obtained, S102, based on the fault equipment information and the positioning information, a preset spare power automatic switching simulation model is combined to perform spare power automatic switching simulation to obtain power supply running state information of voltage-losing equipment in a bus power supply range, S103, load superposition algorithm is used for carrying out load flow calculation on the power supply running state information to obtain load data of stable equipment, S104, cut-off line information is obtained according to a stable configuration information table and the load data, and based on the load data and the cut-off line information, a power grid running structure is combined to restore power supply, and the existing technical problem of low efficiency of the existing power restoration method is solved through the power restoration method, so that the power restoration efficiency is improved.
Referring to fig. 2, fig. 2 is a flowchart of a power restoration method according to the present invention, including:
Step S201, obtaining fault equipment information and positioning information of the fault equipment;
in the embodiment of the invention, the information of the fault equipment and the positioning information of the fault equipment are obtained.
Step S202, performing power grid self-healing simulation analysis based on the fault equipment information and the positioning information to obtain voltage loss equipment information and suspected voltage loss equipment information;
in an alternative embodiment, the step S202 includes:
step S2021, extracting suspected voltage-loss equipment information from an equipment table based on the fault equipment information and the positioning information;
and step S2022, determining the fault equipment as the voltage-losing equipment, and obtaining the information of the voltage-losing equipment.
In the embodiment of the invention, based on the fault equipment information and the positioning information, suspected voltage-loss equipment information is extracted from an equipment table, the fault equipment is determined to be the voltage-loss equipment, and the voltage-loss equipment information is obtained.
In a specific implementation, fault isolation is performed based on fault equipment information, if the fault equipment is input from a system foreground and is not a switching equipment, the nearest switching equipment on each side is searched by a primary equipment table and a primary equipment connection information table, equipment of buses, lines and main transformers in a switching section is used as fault equipment which is required to be isolated when the fault equipment is in fault, and if the fault equipment is the switching equipment, the fault equipment is skipped.
Obtaining a pressure-loss equipment pool, and initializing a suspected pressure-loss equipment pool: the primary equipment table and the primary equipment connection information table are used for searching fault equipment, directly adjacent primary equipment is added according to the active power direction to serve as a suspected voltage-losing equipment pool, the fault equipment serves as a voltage-losing equipment pool, and the active direction is not required to be considered by the sectionalizing switch and the bus-bar switch, and only opposite-side equipment is required to be added.
Step S203, performing spare power automatic switching simulation according to the suspected voltage-loss equipment information, the voltage-loss equipment information and the preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-loss equipment in a bus power supply range;
in an alternative embodiment, the step S203 includes:
Step S2031, judging whether any of the voltage-loss buses is a protected bus according to a spare power automatic switching configuration table; if not, reselecting another voltage-loss bus, and executing the step S2031 on the other voltage-loss bus;
Step S2032, judging whether any of the voltage-loss buses meets a precondition of automatic switching; if not, another voltage-loss bus is reselected, and the step S2031 is executed for the other voltage-loss bus;
Step S2033, performing running state simulation according to the spare power automatic switching simulation type to obtain bus information for primary power restoration;
Step S2034, sequentially recovering power supply to the external direction of the station according to the original power supply path until all the buses corresponding to the bus information of the primary recovery power supply recover power supply;
Step S2035, determining whether a number of devices in a bus power supply range corresponding to the bus information of any of the preliminary power restoration devices or the devices corresponding to the voltage loss device information changes when the power restoration is performed; if yes, another voltage-losing bus is reselected, and the step S2031 is executed for the another voltage-losing bus; if not, the method comprises the steps of; and determining the bus information of the primary power restoration as the bus information of the power restoration.
Step S2036, obtaining power supply operation state information of the voltage-losing device in the bus power supply range corresponding to the bus information.
In the embodiment of the invention, based on the voltage-loss equipment information and the preset spare power automatic switching simulation model, spare power automatic switching analysis is carried out on any voltage-loss bus in the suspected voltage-loss equipment information to obtain the bus information for recovering power supply, and the power supply running state information of the voltage-loss equipment in the bus power supply range corresponding to the bus information is obtained.
In a specific implementation, any device from the suspected decompression device pool is selected as the analysis device.
Judging whether the current analysis equipment is bus equipment or not, if so, jumping to the next step, otherwise, jumping to the next step.
Judging whether the bus power supplies are all positioned in the voltage-losing equipment pool, searching whether the current bus power supplies are all positioned in the voltage-losing equipment pool from the bus power supply information table, if so, jumping to the next step, and otherwise, returning to the step of selecting any equipment as analysis equipment.
And moving into a voltage-losing equipment pool, adding adjacent equipment into the suspected voltage-losing equipment pool, moving non-bus equipment which does not meet the conditions and bus equipment which meets the conditions from the suspected voltage-losing equipment pool into the voltage-losing equipment pool, searching a primary equipment table and a primary equipment connection relation table according to the active direction, adding the adjacent equipment into the suspected voltage-losing equipment, and directly adding opposite adjacent equipment of the adjacent equipment without considering the active power by a sectioning and bus-bar switch, wherein the adjacent equipment is not repeatedly added with the bus equipment on a searching path.
Judging whether the number of the equipment decompression pools and the suspected decompression equipment pools is changed, comparing whether the number of the decompression equipment, the suspected decompression equipment and the numbers after the analysis start are changed, if any number is changed, jumping to the step of selecting any equipment as the analysis equipment, otherwise jumping to the next step.
And simulating the voltage loss state, and setting the corresponding voltage of the voltage loss equipment pools with no quantity change to be 0 after the voltage loss equipment pools with no quantity change are obtained.
And obtaining all equipment information in all the voltage-loss equipment pools.
Judging whether all buses in the voltage-loss equipment are analyzed; otherwise, jumping to the next step; if yes, jumping to the simulated power restoration step.
Selecting any one of the voltage-losing buses, judging whether the any one of the voltage-losing buses is protected, if so, jumping to the next step; if not, returning to judge whether all buses in the voltage-loss equipment complete the analysis step.
Judging whether any of the voltage-loss buses meets the precondition of automatic standby switching; if not, returning to judge whether all buses in the voltage-loss equipment complete the analysis step; if yes, jumping to the next step. If the bus is 110kV or 220kV voltage, judging whether a circuit to be electrified in the configuration table is in the voltage-losing equipment, if so, not meeting the requirement of returning to judge whether all buses in the voltage-losing equipment complete the analysis step, otherwise, meeting the spare power automatic switching starting condition and jumping to the next step; if the bus is in the 10kV voltage class, judging whether the voltage value of the switch to be electrified is 0, if so, not meeting the precondition of the spare power automatic switching, returning to judging whether all buses in the voltage-losing equipment complete the analysis step, otherwise, meeting the starting condition of the spare power automatic switching, and jumping to the next step.
And according to the spare power automatic switching simulation type, performing running state simulation to obtain bus information of primary recovery power supply. 1) If the standby power supply is a line, setting a standby line switch to be closed; setting the active load of the standby line to be-3 (any negative value is enough), searching the load of a switch on the opposite side of the standby line to be +3 (any positive value is enough), setting the switch of the current power supply line to be off, and setting the load to be 0, so as to obtain bus information of primary recovery power supply; 2) If the standby power supply is a bus, setting a sectionalizing and bus-connected switch to be closed, and setting a current power supply line switch to be open and setting a load to be 0; if the standby power supply is a main transformer, setting a standby main transformer high-low switch to be closed, setting a high-low switch load to be +3 and a low-low load to be-3, and setting a current power supply switch to be open; and after the spare power automatic switching simulation is completed, adding the equipment in the power supply range in the station to the complex power equipment set to obtain the bus information of primary recovery power supply.
And in the simulation power restoration step, the power is sequentially restored from the power restoration bus to the off-site direction according to the original power supply path through the backup power automatic switching power restoration bus, until the power is restored to the 10kV bus, and the equipment on the power restoration path is added into the power restoration equipment set.
And judging that the number of equipment sets and the number of voltage-loss equipment are not changed in the power restoration process, if any number is changed, returning to judging whether all buses in the voltage-loss equipment are analyzed, otherwise, ending the analysis process, and determining that the bus information of the primary power restoration is the bus information of the power restoration.
And acquiring power supply operation state information of the voltage-losing equipment in the bus power supply range corresponding to the bus information, wherein the operation state data comprises load data, switch opening and closing data, current data and the like.
Step S204, carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of stable equipment;
the method for acquiring the ring network power supply configuration information table includes:
1. And acquiring power supply point information of the power grid in any region, and acquiring power supply point data of the power grid in any region from the system maintenance data.
2. Performing power grid topology searching, and performing power grid searching according to the following mode:
According to the active power direction, if the starting point equipment is a 500kV main transformer, inquiring primary equipment account information and a primary equipment connection relation table to obtain a main transformer middle-side topology; and performing topology analysis on the outgoing line direction of the 220kV bus of the self station, the 220kV outgoing line of the self station, the incoming line of the opposite side 220kV transformer substation, the bus of the opposite side 220kV transformer substation and the opposite side 220kV transformer substation. For the parallel 220kV buses, the bus connection power direction is not considered in topology analysis. After topology analysis is completed, the 500kV main transformer starting point equipment is correspondingly stored in a system together with a 220kV bus and a 220kV line switch of a 220kV transformer substation on a topology path.
If the starting point equipment is a 220kV line switch, topology analysis is carried out along the power supply 220kV bus-220 kV outgoing line-opposite side 220kV incoming line-opposite side 220kV bus-opposite side 220kV outgoing line direction by inquiring primary equipment standing account information and a primary equipment connection relation table and taking the line switch as a starting point according to the power flow direction. After the topology analysis is completed, the 220kV line switch starting point equipment is correspondingly stored in a system with a 220kV bus and a 220kV line switch of a 220kV transformer substation on a topology path.
3. And obtaining 110kV buses of any 110kV transformer substation, and after all the power supply points are analyzed, obtaining one 110kV bus one by one according to the 110kV transformer substation for analysis.
4. And storing a bus power supply information table, and storing a line switch which can be traced back in the current station by tracing the current bus.
5. Judging whether the current line supplies power to a plurality of lines or not, and judging whether a line switch in a current station traced by the current bus is larger than 1 or not.
And storing ring network power supply information, tracing from the current bus to the power supply point direction to the 220kV main transformer, and storing lines, line switches and the like on the path.
In the embodiment of the invention, through a load superposition algorithm, according to the power running state after voltage loss and spare power automatic switching simulation, a full-network switch (excluding a sectionalized and bus-connected switch) or a main transformer load is solved, so that load data of the stabilizing equipment is obtained.
In the specific implementation, any main transformer low-voltage switch is selected, all buses are searched from the main transformer low-voltage switch to the bus direction, and all buses for supplying power to the main transformer low-voltage switch are obtained from a primary equipment connection relation table, a bus or a sectional switch state.
Judging whether all buses of the power supply of any main transformer are single buses or not; if yes, jumping to the next step, otherwise jumping to the next step.
Distributing the main transformer low load value according to the proportion of the bus power supply current, inquiring the feeder line connected with each bus from a primary equipment connection relation table, calculating the sum of the bus power supply currents through an equipment ammeter, distributing the main transformer low load to each 10kV bus according to the proportion of the sum of the currents, and storing the calculated bus load value.
The main transformer low load value is given to the 10kV bus, and if the condition of judging whether all buses for power supply of any main transformer low are single buses is met, the main transformer low load value is given to the 10kV bus load.
Starting from equipment in a regional power grid configuration table, according to the active power direction, if the starting equipment is a 500kV main transformer, inquiring primary equipment account information and a primary equipment connection relation table to obtain a main transformer medium-side topology; and performing topology analysis on the outgoing line direction of the 220kV bus of the self station, the 220kV outgoing line of the self station, the incoming line of the opposite side 220kV transformer substation, the bus of the opposite side 220kV transformer substation and the opposite side 220kV transformer substation. For the parallel 220kV buses, the bus connection power direction is not considered in topology analysis. After topology analysis is completed, the 500kV main transformer starting point equipment is correspondingly stored in a system together with a 220kV bus and a 220kV line switch of a 220kV transformer substation on a topology path.
If the starting point equipment is a 220kV line switch, topology analysis is carried out along the power supply 220kV bus-220 kV outgoing line-opposite side 220kV incoming line-opposite side 220kV bus-opposite side 220kV outgoing line direction by inquiring primary equipment standing account information and a primary equipment connection relation table and taking the line switch as a starting point according to the power flow direction. After the topology analysis is completed, the 220kV line switch starting point equipment is correspondingly stored in a system with a 220kV bus and a 220kV line switch of a 220kV transformer substation on a topology path.
Any main transformer or switch is selected in the steps, the nearest superior switch or main transformer on each power supply path is searched, the nearest neighbor superior switch (non-segmentation, bus) or main transformer on each power supply path of the equipment is searched in the paths stored in the steps, and the record is not repeated.
And storing the upper-level relation and the load coefficient of the current switch or main transformer, and initializing the load coefficient to be 1.
And acquiring and storing the connection relation between the main transformer and the bus, and searching the 10kV bus powered by each main transformer low switch in the path obtained by the steps.
And assigning a main transformer low-voltage and 10kV bus load, and assigning the bus load value obtained in the step of calculating the bus load value to the 10kV bus and the main transformer low-voltage load obtained in the step, wherein the main transformer low-voltage load is the sum of the loads of the 10kV buses at the lower stage.
And obtaining the ring network power supply configuration information, and obtaining the ring network power supply information and 110kV equipment on a power supply path from a system analysis table.
Judging whether any equipment in the looped network path is positioned in the voltage-loss equipment pool, and sequentially judging whether any equipment in the looped network power supply bus and the 110kV equipment in the power supply path is positioned in the voltage-loss equipment pool, and not all the equipment is positioned in the voltage-loss equipment pool. If the condition is met, returning to the step of acquiring the ring network power supply configuration information, otherwise, jumping to the next step.
And updating the coefficient relation, and modifying a relation table obtained in the step of searching the nearest upper-level switch or main transformer on each power supply path of a circuit switch of a transformer substation to which the loop closing power supply bus belongs, wherein the load coefficient is the load ratio during loop closing power supply.
Judging whether all switches or main transformers in the steps are assigned successfully, if so, ending the analysis step to obtain load data of the stabilizing equipment; otherwise, jumping to the next step.
And selecting any switch or main transformer in the updated relation and load coefficient table in the step, judging whether all the subsequent connected devices are successfully assigned, searching the associated device of the analysis device from the relation obtained in the step, if the assignment of all the associated devices is successful, jumping to the next step, otherwise, returning to the step of judging whether the assignment of all the switches or the main transformers in the step is successful.
And storing the load data of the current switch or the main transformer, and summarizing the product of the related subordinate equipment and the coefficient proportion as the load data of the current switch or the main transformer to obtain the load data of the stabilizing equipment.
Step S205, obtaining cut-off line information according to the stability configuration information table and the load data;
In the embodiment of the invention, judgment is performed based on the stability configuration information table and the load data to obtain cut-off line information.
In a specific implementation, according to the stability configuration information table, sequentially inquiring whether the stability equipment load value obtained in the step S204 is larger than a control value, if so, inquiring the equipment tangent line sequence through the configuration table, and taking out the current round tangent line information through the recorded round information to obtain cut line information, and taking out the first cut round line information when the current equipment round information is not available to obtain the cut line information.
Judging whether the cut-off line information has a tangent line or not, and if yes, adding each device needing stable control and the current round of tangent line information into the fault device information.
Step S206, carrying out bus duplicate path search according to the voltage level and based on the load data, the cut-off line information and the power grid operation structure to obtain path information of bus restoration power supply;
in the embodiment of the invention, the complex electric path is searched according to the voltage grade, and the path information of the bus restoration power supply is obtained.
In a specific implementation, the buses are sequentially subjected to voltage loss according to the voltage levels from high to low, and the buses in the voltage loss equipment pool obtained in the steps S201 to S205 are sequentially selected for analysis according to the voltage levels from high to low.
And judging whether the current bus is a 220kV bus of the 220kV transformer substation, if so, jumping to the next step, otherwise, jumping to the step of judging whether the current bus is a 110kV bus of the 220kV transformer substation.
And searching paths to the lines or buses with the same voltage level, searching available complex electric paths from the primary equipment connection relation table to the 220kV lines or 220kV buses, requiring that equipment on the complex electric paths cannot be located in a voltage-losing equipment pool, and jumping to the next step if the complex electric paths exist.
And recovering the power supply range of the 220kV bus, recovering the 220kV bus and equipment in the power supply range, removing the equipment in the power supply range from the voltage-losing equipment pool, and enabling the re-electrification equipment not to participate in the subsequent bus re-electrification path analysis process.
And judging whether the current bus is a 110kV bus of the 220kV transformer substation, if so, jumping to the next step, otherwise, jumping to the step of judging whether the current bus is the 110kV bus of the 110kV transformer substation.
Selecting 110kV line serial bus meeting the condition, and searching one line requirement of current bus connection from a primary equipment connection relation table: the opposite side of the line can trace back to an electrified 110kV bus; the line is not located in the faulty device; and if the line margin meets the maximum margin in the conditions, jumping to the next step, otherwise jumping to the step of judging whether the current bus is the 110kV bus of the 110kV transformer substation.
And recovering the power supply range of the 110kV bus, recovering the 110kV bus and equipment in the power supply range, removing the equipment in the power supply range from the voltage-losing equipment pool, and enabling the re-electrification equipment not to participate in the subsequent bus re-electrification path analysis process.
And judging whether the current bus is a 110kV bus of the 110kV transformer substation, if so, jumping to the next step, otherwise, jumping to the step of judging whether the current bus is a 10kV bus.
And searching paths of the same-voltage-class lines or buses, searching available complex electric paths from a primary equipment connection relation table to the 110kV lines or the 110kV buses, requiring that equipment on the complex electric paths cannot be located in a voltage-losing equipment pool, and if the complex electric paths exist, jumping to a step of recovering the power supply range of the 110kV buses.
And judging whether the current bus is a10 kV bus, if so, jumping to the next step, otherwise, ending the analysis process, and obtaining the path information of the bus for recovering the power supply.
And searching a path to the 10kV bus or the main transformer, searching an available complex electric path to the main transformer or the 10kV bus from a primary equipment connection relation table, requiring that equipment on the complex electric path cannot be located in a voltage-loss equipment pool, and recovering the power supply of the 10kV bus if the complex electric path exists, so as to obtain path information of recovering the power supply of the bus.
Step S207, power supply is restored according to the path information.
In the embodiment of the invention, the power supply is restored according to the path information.
Step S208, calculating switch load data or main transformer load data after power supply restoration, and determining whether the load condition after power supply restoration is normal according to the switch load data or the main transformer load data after power supply restoration.
According to the power restoration method provided by the embodiment of the invention, through S1, fault equipment information and positioning information of the fault equipment are obtained, S2, based on the fault equipment information and the positioning information, a preset spare power automatic switching simulation model is combined to perform spare power automatic switching simulation to obtain power supply running state information of the voltage-losing equipment in a bus power supply range, S3, load superposition algorithm is adopted to perform load flow calculation on the power supply running state information to obtain load data of stable equipment, S4, cut-off line information is obtained according to a stable configuration information table and the load data, and based on the load data and the cut-off line information, a power grid running structure is combined to restore power supply, and the existing technical problem of low efficiency of the existing power restoration method is solved through the power restoration method, so that the power restoration efficiency is improved.
Referring to fig. 3, fig. 3 is a block diagram of a power restoration device according to an embodiment of the present invention, including:
An obtaining module 301, configured to obtain fault device information and location information of the fault device;
the simulation module 302 is configured to perform a spare power automatic switching simulation by combining a preset spare power automatic switching simulation model based on the fault equipment information and the positioning information, so as to obtain power supply running state information of the voltage-losing equipment within a bus power supply range;
The load module 303 is configured to perform load flow calculation on the power supply operation state information through a load superposition algorithm, so as to obtain load data of the stabilizing device;
The circuit module 304 is configured to obtain cut-off circuit information according to the stability configuration information table and the load data;
And the power supply module 305 is used for restoring power supply based on the load data and the cut-off line information by combining a power grid operation structure.
In an alternative embodiment, the apparatus further comprises:
the information module is used for acquiring line information and switch information on each side of the line;
The construction module is used for constructing the spare power automatic switching simulation model based on the line information and the switch information of each side of the line.
In an alternative embodiment, the simulation module 302 includes:
The voltage loss sub-module is used for carrying out power grid self-healing simulation analysis based on the fault equipment information and the positioning information to obtain voltage loss equipment information and suspected voltage loss equipment information;
And the simulation sub-module is used for performing spare power automatic switching simulation according to the suspected voltage-loss equipment information, the voltage-loss equipment information and the preset spare power automatic switching simulation model to obtain the power supply running state information of the voltage-loss equipment in the bus power supply range.
In an alternative embodiment, the decompression submodule includes:
the suspected system is used for extracting suspected voltage-loss equipment information from the equipment table based on the fault equipment information and the positioning information;
And the voltage loss system is used for determining the fault equipment as voltage loss equipment and obtaining the information of the voltage loss equipment.
In an alternative embodiment, the simulation submodule includes:
The bus system is used for carrying out spare power automatic switching analysis on any one of the voltage-losing buses in the suspected voltage-losing equipment information based on the voltage-losing equipment information and the preset spare power automatic switching simulation model to obtain bus information for recovering power supply;
And the state system is used for acquiring the power supply operation state information of the voltage-losing equipment in the bus power supply range corresponding to the bus information.
In an alternative embodiment, the bus bar system includes:
the first judging subsystem is used for judging whether any of the voltage-losing buses is a protected bus or not according to the spare power automatic switching configuration table; if not, another voltage-losing bus is reselected, and the first judging subsystem step is executed on the another voltage-losing bus;
The second judging subsystem is used for judging whether any of the voltage-loss buses meets the spare power automatic switching precondition or not; if not, reselecting another voltage-losing bus, and executing the first judging subsystem step on the another voltage-losing bus;
And the simulation subsystem is used for simulating the running state of the power grid according to the spare power automatic switching simulation type to obtain the bus information for recovering the power supply.
In an alternative embodiment, the simulation subsystem includes:
The simulation unit is used for performing running state simulation according to the spare power automatic switching simulation type to obtain bus information of primary recovery power supply;
The recovery unit is used for sequentially recovering power supply to the external direction of the station according to the original power supply path until the bus information of the primary recovery power supply is completely recovered to the power supply;
The first judging unit is used for judging whether the number of the equipment in the bus power supply range corresponding to the bus information of any primary recovery power supply or the equipment corresponding to the voltage-loss equipment information changes or not when the power supply is recovered; if yes, another voltage-losing bus is reselected, and the first judging subsystem step is executed on the another voltage-losing bus; if not, the method comprises the steps of; and determining the bus information of the primary power restoration as the bus information of the power restoration.
In an alternative embodiment, the line module 304 includes:
The judging sub-module is used for judging whether the load data is larger than a control value according to the stability configuration information table; if yes, extracting current round of tangent line information from the stable configuration information table to serve as the cut-off line information; if not, taking the first cutting round line information as the cutting line information;
And the adding sub-module is used for adding the equipment information to be stably controlled and the current round of tangent line information to the cut-off line information when the tangent line exists in the cut-off line information.
In an alternative embodiment, the power module 305 includes:
The path submodule is used for searching a bus duplicate path according to the size of the voltage class based on the load data, the cut-off line information and the power grid operation structure to obtain path information of bus restoration power supply;
And the power supply electronic module is used for recovering power supply according to the path information.
In an alternative embodiment, the apparatus further comprises:
The determining module is used for calculating the switch load data or the main transformer load data after power restoration, and determining whether the load condition after power restoration is normal or not according to the switch load data or the main transformer load data after power restoration.
The embodiment of the invention also provides an electronic device, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program when executed by the processor causes the processor to execute the steps of the power restoration method according to any embodiment.
The embodiment of the invention also provides a computer storage medium, on which a computer program is stored, which when executed by the processor implements the power restoration method according to any of the embodiments above.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments provided in the present application, it should be understood that the methods, apparatuses, electronic devices and storage media disclosed in the present application may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a readable storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned readable storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method of restoring power comprising:
s1, acquiring fault equipment information and positioning information of the fault equipment;
S2, based on the fault equipment information and the positioning information, carrying out spare power automatic switching simulation by combining a preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-losing equipment in a bus power supply range;
s3, carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of the stable equipment;
S4, obtaining cut-off line information according to the stability configuration information table and the load data;
s5, based on the load data and the cut-off line information, combining a power grid operation structure to restore power supply;
The step S2 comprises the following steps:
s21, carrying out power grid self-healing simulation analysis based on the fault equipment information and the positioning information to obtain voltage loss equipment information and suspected voltage loss equipment information;
S22, performing spare power automatic switching simulation according to the suspected voltage-loss equipment information, the voltage-loss equipment information and the preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-loss equipment in a bus power supply range;
the step S21 includes:
s211, extracting suspected voltage-loss equipment information from an equipment table based on the fault equipment information and the positioning information;
s212, determining the fault equipment as voltage-loss equipment, and obtaining information of the voltage-loss equipment;
Step S22 includes:
S221, performing spare power automatic switching analysis on any one of the voltage-losing buses in the suspected voltage-losing equipment information based on the voltage-losing equipment information and the preset spare power automatic switching simulation model to obtain bus information for recovering power supply;
s222, acquiring power supply operation state information of the voltage-losing equipment in a bus power supply range corresponding to the bus information;
the step S4 includes:
s41, judging whether the load data is larger than a control value according to the stability configuration information table; if yes, extracting current round of tangent line information from the stable configuration information table to serve as the cut-off line information; if not, taking the first cutting round line information as the cutting line information;
s42, when the cut-off line information contains a tangent line, adding the equipment information to be stably controlled and the current round tangent line information to the cut-off line information;
the step S5 comprises the following steps:
S51, carrying out bus duplicate path search according to the voltage level and based on the load data, the cut-off line information and the power grid operation structure to obtain path information of bus restoration power supply;
and S52, carrying out power restoration according to the path information.
2. The power restoration method according to claim 1, wherein the step of constructing the spare power automatic switching simulation model includes:
Acquiring line information and switching information of each side of a line;
And constructing the spare power automatic switching simulation model based on the line information and the switch information of each side of the line.
3. The method of restoring power according to claim 1, wherein step S221 includes:
S2211, judging whether any of the voltage-losing buses is a protected bus or not according to a spare power automatic switching configuration table; if not, reselecting another voltage-losing bus, and executing step S2211 on the another voltage-losing bus;
S2212, judging whether any of the voltage-loss buses meets the precondition of automatic backup power switching or not; if not, reselecting another voltage-losing bus, and executing step S2211 on the another voltage-losing bus;
s2213, performing power grid running state simulation according to the spare power automatic switching simulation type to obtain the bus information for recovering power supply.
4. The power restoration method according to claim 3, wherein step S2213 includes:
S22131, performing running state simulation according to the spare power automatic switching simulation type to obtain bus information of primary recovery power supply;
s22132, sequentially recovering power supply to the external direction of the station according to the original power supply path until all the buses corresponding to the bus information of the primary recovery power supply recover power supply;
s22133, judging whether the quantity of the equipment in the bus power supply range corresponding to the bus information of any primary recovery power supply or the equipment corresponding to the voltage-loss equipment information is changed or not when the power supply is recovered; if yes, another voltage-losing bus is reselected, and step S2211 is executed on the another voltage-losing bus; if not, the method comprises the steps of; and determining the bus information of the primary power restoration as the bus information of the power restoration.
5. The method of recovering power according to claim 1, further comprising, after step S5:
S6, calculating switching load data or main transformer load data after power supply restoration, and determining whether the load condition after power supply restoration is normal according to the switching load data or the main transformer load data after power supply restoration.
6. A power restoration device, comprising:
the acquisition module is used for acquiring fault equipment information and positioning information of the fault equipment;
The simulation module is used for carrying out spare power automatic switching simulation by combining a preset spare power automatic switching simulation model based on the fault equipment information and the positioning information to obtain power supply running state information of the voltage-losing equipment in a bus power supply range;
The load module is used for carrying out load flow calculation on the power supply running state information through a load superposition algorithm to obtain load data of the stable equipment;
The circuit module is used for obtaining cut-off circuit information according to the stability configuration information table and the load data;
the power supply module is used for restoring power supply based on the load data and the cut-off line information by combining a power grid operation structure;
the simulation module includes:
The voltage loss sub-module is used for carrying out power grid self-healing simulation analysis based on the fault equipment information and the positioning information to obtain voltage loss equipment information and suspected voltage loss equipment information;
The simulation sub-module is used for performing spare power automatic switching simulation according to the suspected voltage-loss equipment information, the voltage-loss equipment information and the preset spare power automatic switching simulation model to obtain power supply running state information of the voltage-loss equipment in a bus power supply range;
the decompression submodule comprises:
the suspected system is used for extracting suspected voltage-loss equipment information from the equipment table based on the fault equipment information and the positioning information;
the voltage loss system is used for determining the fault equipment as voltage loss equipment and obtaining information of the voltage loss equipment;
the simulation submodule comprises:
The bus system is used for carrying out spare power automatic switching analysis on any one of the voltage-losing buses in the suspected voltage-losing equipment information based on the voltage-losing equipment information and the preset spare power automatic switching simulation model to obtain bus information for recovering power supply;
The state system is used for acquiring the power supply operation state information of the voltage-losing equipment in the bus power supply range corresponding to the bus information;
the line module includes:
The judging sub-module is used for judging whether the load data is larger than a control value according to the stability configuration information table; if yes, extracting current round of tangent line information from the stable configuration information table to serve as the cut-off line information; if not, taking the first cutting round line information as the cutting line information;
an adding sub-module, configured to add, when an tangent line exists in the cut-off line information, each piece of equipment information to be controlled stably and current round tangent line information to the cut-off line information;
the power supply module includes:
The path submodule is used for searching a bus duplicate path according to the size of the voltage class based on the load data, the cut-off line information and the power grid operation structure to obtain path information of bus restoration power supply;
And the power supply electronic module is used for recovering power supply according to the path information.
7. An electronic device comprising a processor and a memory storing computer readable instructions that, when executed by the processor, perform the method of any of claims 1-5.
8. A storage medium having stored thereon a computer program which, when executed by a processor, performs the method of any of claims 1-5.
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