CN109460844B - GIS-based power-conserving vehicle optimized scheduling method - Google Patents
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Abstract
The invention relates to the field of power system automation, in particular to an optimal dispatching method for a power-conserving vehicle based on a GIS. The GIS-based power-conserving vehicle optimal scheduling method is characterized by comprising the following steps of: A) importing a power grid topological structure, road network information and electric vehicle attachment information, and solving an electric target set; B) taking the intersection as a node, taking the electricity-conserving target as a target node, using the road section to pass through time consumption as a connecting line, establishing a time-consuming node model, and placing a movable node representing an electricity-conserving vehicle to obtain the target model; C) solving an objective model by taking the minimum sum of the arrival time of the power-conserving vehicles obtained by any power-conserving objective as an objective; D) when a power-conserving target fails, a power-conserving vehicle with the shortest arrival time is assigned, and an optimal route is displayed. The invention has the beneficial effects that: the dispatching scheme which enables the efficiency of the power-conserving vehicle to be highest is obtained through a scientific algorithm, and the rationality and the scientificity of dispatching the power-conserving vehicle are improved.
Description
Technical Field
The invention relates to the field of power system automation, in particular to an optimal dispatching method for a power-conserving vehicle based on a GIS.
Background
The electricity utilization condition of important users is the work key point of power supply enterprises, the important users have important positions in local society, politics and economy although the number of the users is small, and the interruption of power supply can cause great political influence, great economic loss, even serious disorder of social public order and the like. Therefore, the power supply reliability of important users is improved, a perfect and feasible power conservation scheme is established and effectively implemented, and the method has important practical significance for power supply companies. In the current power supply protection work, although a large number of guard personnel can be arranged on the site, the types of power protection emergency repair vehicles are more, the number of each type is not large enough to be arranged on the whole site, so that the power protection emergency repair vehicles are often arranged on the position which is subjectively considered to be suitable by power protection planning personnel, scientific planning is lacked, the power protection emergency repair vehicles are considered to be out of consideration, and the power protection emergency repair vehicles are not favorable for timely repairing sudden faults. There is thus a need for a system that can intelligently schedule a power conservation maintenance vehicle.
Chinese patent CN 101105891 a, published 2008, 1 month and 16 days, a GPS vehicle monitoring and scheduling system applied to power system, which includes vehicle-mounted terminal equipment, wireless communication network, monitoring and scheduling center and task assignment system with intelligent scheduling algorithm and fault processing time statistical model, monitors and assigns maintenance tasks through the task assignment system with intelligent scheduling algorithm and fault processing time statistical model, realizes monitoring and scheduling of GPS vehicle, improves scheduling efficiency, and realizes whole process monitoring, so that monitoring of service work is more effective, and assessment is more objective and fair, but it does not disclose intelligent scheduling algorithm.
Disclosure of Invention
The technical problem to be solved by the invention is that the current dispatching of the power-conserving vehicle has subjectivity and lacks scientific planning. The optimal dispatching method of the power-conserving vehicle based on the GIS and capable of intelligently calculating the optimal dispatching scheme is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the GIS-based power-conserving vehicle optimal scheduling method comprises the following steps: A) importing a power grid topological structure and electric vehicle attachment information, solving an electric target set, and acquiring road network information by a GIS (geographic information system); B) taking a road intersection as a node, taking a power-conserving target as a target node, taking a road section passing time consumption as a connecting line, connecting the connecting line with the node and the target node based on a road network topological structure, establishing a time-consuming node model, and randomly putting a power-conserving vehicle into the time-consuming node model as a movable node to obtain a target model; C) solving an objective model to obtain the optimal dispatching of the power-conserving vehicles by taking the minimum time sum of the power-conserving vehicles obtained after any power-conserving target in the power-conserving target set breaks down as an objective; D) when the power-conserving targets in the power-conserving target set have faults, assigning the power-conserving vehicle with the shortest arrival time and displaying an optimal route; E) and monitoring the execution condition of the power-conserving vehicle, and updating the scheduling.
Preferably, the solving of the power conservation target set comprises the following steps: A1) acquiring a power protection user set and a power grid topological structure; A2) solving a power supply source and a power supply line by adopting a breadth-first algorithm; A3) and taking the power supply equipment contained in the power supply source and the power supply line as a power protection target to obtain a power protection target set.
Preferably, the establishing of the time-consuming node model comprises the following steps: B1) taking a road intersection as a node, predicting the passage time consumption of a road section according to the historical data of the road section, and connecting the nodes by taking the passage time consumption as a connecting line to form a time-consuming node topological structure; B2) adding the electricity-preserving target into a road topological structure as a node, and recalculating a corresponding time-consuming connection line; B3) and taking the electricity-preserving vehicle as a movable node and randomly placing the movable node in a time-consuming node topological structure to form a time-consuming node model.
Preferably, the solving of the objective model comprises the following steps: C1) calculating the shortest time for a movable node i representing a power-conserving vehicle to reach a target node g representing a power-conserving target according to a time-consuming node modelThe minimum value is taken as a power-protection target to obtain the arrival time of the power-protection vehicleAnd further writing a calculation formula of the target function F:
wherein G is a target node set; C2) taking a positive real value as an initial value T of the control parameter T0The count N is set to 0; C3) randomly moving a movable node in the time-consuming node model to any adjacent node or between any adjacent nodes, calculating the difference delta F between the value of the target function F' after moving and the value of the target function F before moving, if the delta F is less than 0, accepting the position of the movable node after moving as a new solution and setting the value of N as 0, otherwise, calculating the probability p,comparing a random value epsilon in the interval [0, 1) with p, if p is larger than epsilon, accepting the position of the movable node after movement as a new solution and setting the value of N as 0, otherwise, maintaining the solution before movement and adding 1 to the value of N; C4) calculating a value T' of a new control parameter T, T-lnT; C5) and judging whether a termination condition is met, wherein the termination condition is that T is less than or equal to 1 and N is more than or equal to 20, if the termination condition is not met, the step C3-C4 is repeated by taking T' as the value of the control parameter T, if the termination condition is met, the solution is ended, and the position of the current movable node is taken as the optimal solution.
Preferably, the step of assigning the electricity-conserving vehicle with the shortest arrival time comprises the following steps: D1) according to the time-consuming node model, exhausting all routes from the movable node i representing the power-conserving vehicle to the target node g representing the power-conserving target and calculating the time consumptionWherein X is the set of all routes, takenIs taken as the shortest time consumption for the corresponding movable node i to reach the target node gGetThe line corresponding to the minimum value of (a) is taken as the optimal line gamma of g-ig-i(ii) a D2) GetThe movable node i corresponding to the minimum value of (a) is taken as an assigned power-conserving vehicle, and the route gamma is taken asg-iAnd displaying as an optimal route, wherein I belongs to I, and I is a set of power-conserving vehicles.
Preferably, the solving of the objective model comprises the following steps: C11) acquiring historical average fault rate psi of power-conserving target g from big data platformg(ii) a C12) Calculating the shortest time for a movable node i representing a power-conserving vehicle to reach a target node g representing a power-conserving target according to a time-consuming node modelThe minimum value is taken as a power-protection target to obtain the arrival time of the power-protection vehicleHistorical mean fault rate psi considering power conservation objective ggWriting a calculation formula of the target function F:
wherein G is a target node set; C13) taking a positive real value as an initial value T of the control parameter T0The count N is set to 0; C14) randomly moving a movable node in the time-consuming node model to any adjacent node or between any adjacent nodes, calculating the difference delta F between the value of the target function F' after moving and the value of the target function F before moving, if the delta F is less than 0, accepting the position of the movable node after moving as a new solution and setting the value of N as 0, otherwise, calculating the probability p,comparing a random value epsilon in the interval [0, 1) with p, if p is larger than epsilon, accepting the position of the movable node after movement as a new solution and setting the value of N as 0, otherwise, maintaining the solution before movement and adding 1 to the value of N; C15) calculating a value T' of a new control parameter T, T-lnT; C16) and judging whether a termination condition is met, wherein the termination condition is that T is less than or equal to 1 and N is more than or equal to 20, if the termination condition is not met, the step C14-C15 is repeated by taking T' as the value of the control parameter T, if the termination condition is met, the solution is ended, and the position of the current movable node is taken as the optimal solution.
Preferably, the method for updating the schedule includes: E1) when the power-conserving vehicle is assigned to carry out maintenance tasks, deducting the assigned power-conserving vehicle and the power-conserving target with faults, establishing a target model again by using the residual power-conserving target and the power-conserving vehicle, and repeating the step C; E2) and D, when the power-protection vehicle completes the maintenance task, adding the power-protection vehicle which completes the maintenance and the power-protection target to be maintained, establishing the target model again, and repeating the step C.
Preferably, the shortest time for the mobile node i to reach the target node g is calculatedThe method comprises the following steps: according to the time-consuming node model, exhausting all routes from the movable node i representing the power-conserving vehicle to the target node g representing the power-conserving target and calculating the time consumptionWherein X is the set of all routes, takenIs taken as the shortest time for the mobile node i to reach the target node g
Preferably, a plurality of power protection targets located at the same position of the road network topology structure are regarded as one power protection target.
The substantial effects of the invention are as follows: the dispatching scheme which enables the efficiency of the power-conserving vehicle to be highest is obtained through a scientific algorithm, and the rationality and the scientificity of dispatching the power-conserving vehicle are improved.
Drawings
Fig. 1 is a flow chart of a GIS-based power-conserving vehicle scheduling method.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
As shown in fig. 1, a flow chart of a power-conserving vehicle scheduling method based on a GIS is shown, and first, according to a power grid topology and power-conserving user information, a power supply and a transmission line of a power-conserving user are obtained by using a breadth-first algorithm, and a power supply target set is obtained by using power supply devices included in the power supply and the power supply line as power-conserving targets.
And importing the road network information by the GIS system to obtain a road network topological structure, and obtaining the average traffic time of each road section of the road network according to the GIS historical data. And (4) taking the road intersections as nodes and taking the road section time consumption as connecting lines, reconstructing a road network topological structure and constructing a time-consuming node model. And importing the electricity-protecting targets serving as target nodes into a time-consuming node model according to the geographic positions of the electricity-protecting targets, wherein a plurality of electricity-protecting targets located at the same position of the topological structure of the road network are regarded as one electricity-protecting target, and then importing the electricity-protecting vehicles serving as movable nodes into the time-consuming node model according to the attached information of the electricity-protecting vehicles to form the target model. And solving the target model by using a simulated annealing method to obtain an optimal solution which is used as a scheduling scheme of the power-conserving vehicle. And monitoring whether the electricity-guaranteeing target set has maintenance requirements or not, and attaching the electricity-guaranteeing vehicles to have vehicles which complete maintenance tasks or not, and updating the optimal scheduling scheme of the vehicles.
The method for solving the target model by using the simulated annealing method comprises the following steps:
s101) calculating the shortest time for a movable node i representing an electricity-conserving vehicle to reach a target node g representing an electricity-conserving target according to a time-consuming node modelThe minimum value is taken as a power-protection target to obtain the arrival time of the power-protection vehicleAnd further writing a calculation formula of the target function F:
wherein G is a target node set;
s102) taking a positive real value as an initial value T of the control parameter T0The count N is set to 0;
s103) randomly moving a movable node in the time-consuming node model to any adjacent node or between any adjacent nodes, calculating a difference value delta F between the value of the target function F' after moving and the value of the target function F before moving, if the delta F is less than 0, accepting the position of the movable node after moving as a new solution and setting the value of N as 0, otherwise, calculating the probability p,comparing a random value epsilon in the interval [0, 1) with p, if p is larger than epsilon, accepting the position of the movable node after movement as a new solution and setting the value of N as 0, otherwise, maintaining the solution before movement and adding 1 to the value of N;
s104) calculating a value T' of the new control parameter T;
s105) judging whether a termination condition is met, wherein the termination condition is that T is less than or equal to 1 and N is greater than or equal to 20, if the termination condition is not met, the step S103-S104 is repeated by taking T' as the value of the control parameter T, if the termination condition is met, the solution is ended, and the position of the current movable node is taken as the optimal solution.
Another example of solving the target model using simulated annealing that takes into account historical failure rates is:
s201) acquiring historical mean fault rate psi of power-conserving target g from big data platformg;
S202) calculating that a movable node i representing a power-saving vehicle reaches a target node representing a power-saving target according to the time-consuming node modelMinimum time of point gThe minimum value is taken as a power-protection target to obtain the arrival time of the power-protection vehicleHistorical mean fault rate psi considering power conservation objective ggWriting a calculation formula of the target function F:
wherein G is a target node set;
s203) taking a positive real value as an initial value T of the control parameter T0The count N is set to 0;
s204) randomly moving the movable node in the time-consuming node model to any adjacent node or between any adjacent nodes, calculating the difference value delta F between the value of the target function F' after moving and the value of the target function F before moving, if delta F is less than 0, accepting the position of the movable node after moving as a new solution and setting the value of N as 0, otherwise, calculating the probability p,comparing a random value epsilon in the interval [0, 1) with p, if p is larger than epsilon, accepting the position of the movable node after movement as a new solution and setting the value of N as 0, otherwise, maintaining the solution before movement and adding 1 to the value of N;
s205) calculating a value T', T ═ T-lnT of the new control parameter T;
s206) judging whether a termination condition is met, wherein the termination condition is that T is less than or equal to 1 and N is more than or equal to 20, if the termination condition is not met, the step C14-C15 is repeated by taking T' as the value of the control parameter T, and if the termination condition is met, the solution is ended, and the position of the current movable node is taken as the optimal solution.
Shortest time for mobile node i to reach target node g representing power-conserving objectThe calculation method comprises the following steps: according to the time-consuming node model, exhausting all routes from the movable node i representing the power-conserving vehicle to the target node g representing the power-conserving target and calculating the time consumptionWherein X is the set of all routes, takenThe shortest time taken for the movable node i corresponding to the minimum value of (a) to reach the target node g
The method for assigning the electricity-keeping vehicle with the shortest arrival time comprises the following steps:
s301) exhausting all routes from the movable node i representing the power-conserving vehicle to the target node g representing the power-conserving target according to the time-consuming node model and calculating time consumptionWherein X is the set of all routes, takenThe shortest time taken for the movable node i corresponding to the minimum value of (a) to reach the target node gGetThe line corresponding to the minimum value of (a) is taken as the optimal line gamma of g-ig-i(ii) a S302) takingThe movable node i corresponding to the minimum value of (a) is taken as an assigned power-conserving vehicle, and the route gamma is taken asg-iAnd displaying as an optimal route, wherein I belongs to I, and I is a set of power-conserving vehicles.
The method for updating the optimal scheduling of the vehicle comprises the following steps:
s401) when the power-conserving vehicle is assigned to carry out maintenance tasks, deducting the assigned power-conserving vehicle and the power-conserving target with faults, establishing a target model again by using the residual power-conserving target and the power-conserving vehicle, and solving the target model again to update an optimal solution;
s402) when the power-saving vehicle completes the maintenance task, adding the power-saving vehicle which completes the maintenance and the maintained power-saving target to establish the target model again and solving the target model again to update the optimal solution.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (9)
1. The GIS-based power-conserving vehicle optimized dispatching method is characterized in that,
comprises the following steps:
A) importing a power grid topological structure and electric vehicle attachment information, solving an electric target set, and acquiring road network information by a GIS (geographic information system);
B) taking a road intersection as a node, taking a power-conserving target as a target node, taking a road section passing time consumption as a connecting line, connecting the connecting line with the node and the target node based on a road network topological structure, establishing a time-consuming node model, and randomly putting a power-conserving vehicle into the time-consuming node model as a movable node to obtain a target model;
C) solving an objective model to obtain the optimal dispatching of the power-conserving vehicles by taking the minimum time sum of the power-conserving vehicles obtained after any power-conserving target in the power-conserving target set breaks down as an objective;
D) when the power-conserving targets in the power-conserving target set have faults, assigning the power-conserving vehicle with the shortest arrival time and displaying an optimal route;
E) and monitoring the execution condition of the power-conserving vehicle, and updating the scheduling.
2. The GIS-based power-conserving vehicle optimized scheduling method of claim 1,
the solving of the power conservation objective set comprises the following steps:
A1) acquiring a power protection user set and a power grid topological structure;
A2) solving a power supply source and a power supply line by adopting a breadth-first algorithm;
A3) and taking the power supply equipment contained in the power supply source and the power supply line as a power protection target to obtain a power protection target set.
3. The GIS-based power-conserving vehicle optimized scheduling method of claim 1,
the establishing of the time-consuming node model comprises the following steps:
B1) taking a road intersection as a node, predicting the passage time consumption of a road section according to the historical data of the road section, and connecting the nodes by taking the passage time consumption as a connecting line to form a time-consuming node topological structure;
B2) adding the electricity-preserving target into a road topological structure as a node, and recalculating a corresponding time-consuming connection line;
B3) and taking the electricity-preserving vehicle as a movable node and randomly placing the movable node in a time-consuming node topological structure to form a time-consuming node model.
4. The GIS-based power-conserving vehicle optimized scheduling method of claim 1,
the solving of the objective model comprises the following steps:
C1) calculating movable nodes representing power-conserving vehicles according to time-consuming node modelTo a target node representing a power conservation objectivegMinimum time ofAnd taking the minimum value as a power-protection target to obtain the arrival time of the power-protection vehicleFurther write out the objective functionFThe calculation formula (c) is as follows:
whereinGA target node set is obtained;
C2) taking a positive real value as a control parameterTInitial value of (2)T 0 Counting ofNSetting to 0;
C3) randomly moving a movable node in the time-consuming node model to any adjacent node or between any adjacent nodes, and calculating a moved objective functionValue of (D) and pre-shift objective functionFDifference of value ofIf, ifThen the moved mobile node position is accepted as a new solution and willNIs set to 0, otherwise the probability is calculatedp,Taking the random value in the interval [0, 1)Andpin comparison, ifThen the moved mobile node position is accepted as a new solution and willNIs set to 0, otherwise the solution before movement is maintained and will beNAdding 1 to the value of (c);
C5) Judging whether a termination condition is met, wherein the termination condition isAnd isIf the termination condition is not satisfied, the method willAs control parametersTAnd (4) repeating the steps C3-C4, if the termination condition is met, ending the solution, and taking the position of the current movable node as the optimal solution.
5. The GIS-based power-conserving vehicle optimized scheduling method of claim 1,
assigning the power-conserving vehicle with the shortest arrival time comprises the following steps:
D1) exhaustive representation of mobile nodes of a power conservation vehicle according to a time-consuming node modelTo a target node representing a power conservation objectivegAll routes of and calculating time consumingWhereinFor the set of all routes, takeAs a corresponding mobile nodeReach target nodegMinimum elapsed time ofGet itAs a line corresponding to the minimum value ofOf the optimal route;
6. The GIS-based power-conserving vehicle optimized scheduling method of claim 1,
the solving of the objective model comprises the following steps:
C11) from large to largeData platform acquisition power-conserving targetgHistorical mean failure rate of;
C12) Calculating movable nodes representing power-conserving vehicles according to time-consuming node modelTo a target node representing a power conservation objectivegMinimum time ofAnd taking the minimum value as a power-protection target to obtain the arrival time of the power-protection vehicleConsidering the goal of power conservationgHistorical mean failure rate ofWriting out the objective functionFThe calculation formula (c) is as follows:
whereinGA target node set is obtained;
C13) taking a positive real value as a control parameterTInitial value of (2)T 0 Counting ofNSetting to 0;
C14) randomly moving a movable node in the time-consuming node model to any adjacent node or between any adjacent nodes, and calculating a moved objective functionValue of (D) and pre-shift objective functionFDifference of value ofIf, ifThen the moved mobile node position is accepted as a new solution and willNIs set to 0, otherwise the probability is calculatedp,Taking the random value in the interval [0, 1)Andpin comparison, ifThen the moved mobile node position is accepted as a new solution and willNIs set to 0, otherwise the solution before movement is maintained and will beNAdding 1 to the value of (c);
C16) Judging whether a termination condition is met, wherein the termination condition isAnd isIf the termination condition is not satisfied, the method willAs control parametersTAnd (4) repeating the steps C14-C15, if the termination condition is met, ending the solution, and taking the position of the current movable node as the optimal solution.
7. The GIS-based power-conserving vehicle optimized scheduling method of claim 1,
the method for updating and scheduling comprises the following steps:
E1) when the power-conserving vehicle is assigned to carry out maintenance tasks, deducting the assigned power-conserving vehicle and the power-conserving target with faults, establishing a target model again by using the residual power-conserving target and the power-conserving vehicle, and repeating the step C;
E2) and D, when the power-protection vehicle completes the maintenance task, adding the power-protection vehicle which completes the maintenance and the power-protection target to be maintained, establishing the target model again, and repeating the step C.
8. The GIS-based electric vehicle optimal scheduling method of claim 2, wherein a plurality of electric targets located at the same position of the topology of the road network are regarded as one electric target.
9. The GIS-based power-conserving vehicle optimal scheduling method of claim 4 or 6,
computing a mobile nodeReach target nodegMinimum time ofThe method comprises the following steps: exhaustive representation of mobile nodes of a power conservation vehicle according to a time-consuming node modelTo a target node representing a power conservation objectivegAll routes of and calculating time consumingWhereinIs all thatSet of routes, takeAs a mobile nodeReach target nodegMinimum time of。
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