CN117196578A - Scheduling method and system for power grid fault overhaul mode - Google Patents
Scheduling method and system for power grid fault overhaul mode Download PDFInfo
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Abstract
The invention discloses a dispatching method and a dispatching system for a power grid fault overhaul mode, wherein the method comprises the following steps: acquiring operation data of a power grid during fault, and constructing a power grid simulation model; traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; according to the power grid operation problems corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model; according to the overhaul mode of each power grid operation problem, calculating the power grid economic benefit under each overhaul mode; and obtaining an optimal overhaul mode corresponding to each power grid operation problem by taking the maximum power grid economic benefit as an aim, and generating an overhaul mode scheduling scheme. According to the invention, the economic benefit influence of the power grid overhaul mode on the power grid operation is calculated, and the power grid fault overhaul scheme with the aim of minimum economic loss is provided, so that the economic benefit of the power grid operation is maximized.
Description
Technical Field
The invention belongs to the field of power grid fault overhaul, and particularly relates to a scheduling method and system of a power grid fault overhaul mode.
Background
Distribution network overhaul is an indispensable part in the operation of a power grid, and the frequency of power distribution network overhaul are continuously increased along with the continuous expansion of the scale of the power grid. The distribution network is used as an important component of a grid structure and a power grid asset, and the safe and reliable operation of distribution network equipment plays a vital role in the normal operation of the power grid. Whether the distribution network maintenance schedule is reasonable or not affects the safe operation of the distribution network and directly affects the benefits of power supply enterprises and users.
The existing power grid maintenance mode arrangement generally aims at the power grid safe and stable operation risks caused by maintenance of a power transmission line or a transformer and the like, and the corresponding risks are solved by adjusting direct current transmission power, power plant output, power of the power transmission line and the like in a near area of maintenance equipment in a mode pre-control method. However, the existing dispatching method of the power grid maintenance mode is mainly focused on controlling or solving risks, however, various schemes are possible for dispatching in a mode of generally coping with risks, economic benefit differences possibly caused by each scheme are not fully considered in the existing dispatching method, and particularly economic losses possibly caused by solving faults such as reducing high-voltage direct-current transmission power and reducing power plant output are reduced, so that the power grid maintenance cost is too high.
Disclosure of Invention
The invention provides a dispatching method and a dispatching system for a power grid fault maintenance mode, and provides a power grid fault maintenance scheme aiming at minimizing economic loss, so that the economic benefit of power grid operation is maximized.
The first aspect of the invention provides a scheduling method of a power grid fault overhaul mode, which comprises the following steps:
acquiring operation data during power grid overhaul, and constructing a power grid simulation model;
traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; wherein the faults include N-1 faults and N-2 faults;
according to the power grid operation problems corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model; the overhaul mode of each power grid operation problem can be various;
according to the overhaul modes of each power grid operation problem, the active power output of each unit and the active power output of each direct current in each overhaul mode are obtained, the power grid economic benefit in each overhaul mode is calculated, and the power grid economic benefits in the overhaul modes for solving the same power grid operation problem are compared to obtain an overhaul mode scheduling scheme for maximizing the power grid economic benefits.
According to the scheme, the power grid simulation model is obtained through simulation of the operation data during power grid maintenance, then the set of all maintenance modes of each power grid operation problem is obtained through the simulation model, the economic benefits of the power grid in each maintenance mode are calculated, the economic benefits of the power grid in the maintenance modes for solving the same power grid operation problem are compared, the maintenance mode for maximizing the economic benefits of the power grid is obtained, the scheduling scheme of the power grid fault maintenance mode for maximizing the economic benefits of the power grid is determined, and the economic loss caused by the maintenance power grid faults to the power grid operation is smaller.
In one possible implementation method of the first aspect, operation data during power grid overhaul is acquired, and a power grid simulation model is constructed, which specifically includes:
acquiring operation data of the power grid during fault, debugging the numerical value of the simulation model by using simulation software until the debugged simulation model meets the experimental error requirement, and obtaining the power grid simulation model; the operation data during power grid overhaul comprise transmission line operation data, generator set operation data and transformer operation data.
According to the scheme, the operation data during power grid overhaul is obtained, the accurate power grid simulation model is obtained through debugging, and a test environment is provided for obtaining power grid operation problems and overhaul modes.
In one possible implementation method of the first aspect, according to the power grid operation problem corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in the power grid simulation model, which specifically includes:
the specific expression of the set R of power grid operation problems is as follows:
R＝{R i |i＝1,2,…,n}
wherein i is a natural number other than 0;
according to each power grid operation problem, the direct current power of the power grid is adjusted through a power grid simulation model, the unit starting mode of the power grid is adjusted to carry out maintenance, the power grid operation problem is solved, the maintenance mode for solving each power grid operation problem is determined, and a set M of the maintenance modes is obtained, wherein the specific expression is as follows:
M＝{M i,j |j＝1,2,…,n}
wherein j is a natural number other than 0, M i,j For the power grid operation problem R i And (5) a corresponding j-th overhaul mode.
In one possible implementation method of the first aspect, according to the overhaul mode of each power grid operation problem, the active power output of each unit and the active power output of each direct current in each overhaul mode are obtained, and the power grid economic benefit in each overhaul mode is calculated, which specifically includes:
according to the overhaul mode of each power grid operation problem, determining the active power output of each unit in each overhaul mode to obtain the first economic benefit in each overhaul mode;
determining the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, and obtaining the second economic benefit in each maintenance mode;
and calculating the economic benefit of the power grid under each maintenance mode according to the first economic benefit and the second economic benefit.
According to the scheme, the power grid economic benefits corresponding to each maintenance mode are calculated through the maintenance modes, and the optimal maintenance mode of each power grid operation problem is determined, so that the scheduling scheme of the power grid fault maintenance mode for maximizing the power grid economic benefits is obtained, and the economic loss caused by the maintenance of the power grid faults to the power grid operation is smaller.
In one possible implementation method of the first aspect, according to the first economic benefit and the second economic benefit, the grid economic benefit under each maintenance mode is calculated, where the grid economic benefit specifically includes:
first economic benefit C under each maintenance mode g The specific formula is as follows:
C g (P g (i,j))＝αP g (i,j)+K 1
wherein P is g (i, j) is an inspection mode M i,j The active power output of each unit is g is the number of units, alpha is the economic benefit coefficient of the unit output, K 1 Supplementing the economic benefit of the unit;
second economic benefit C under each maintenance mode h The specific formula is as follows:
C h (P h (i,j))＝βP h (i,j)+K 2
wherein P is h (i, j) is an inspection mode M i,j The active power output of each direct current is h is the direct current quantity, beta is the economic benefit coefficient of the direct current output, K 2 Supplementing the direct current economic benefit;
according to the firstEconomic benefit and the second economic benefit, determining an overhaul mode M i,j The economic benefit of the power grid is reduced; wherein, overhaul mode M i,j Corresponding power grid economic benefit C T The specific formula is as follows:
the second aspect of the present invention provides a dispatching system for a power grid fault maintenance mode, the system comprising: the system comprises a data acquisition module, a maintenance mode recording module, an economic benefit calculation module and a scheduling scheme fault treatment module;
the data acquisition module is used for acquiring operation data during power grid overhaul and constructing a power grid simulation model;
the overhaul mode recording module is used for traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; wherein the faults include N-1 faults and N-2 faults; according to the power grid operation problems corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model; wherein, each power grid operation problem corresponds to one or more maintenance modes, and the maintenance modes comprise active power output of a regulating unit and active power output of direct current;
the economic benefit calculation module is used for obtaining the active power output of each unit and the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, and calculating the power grid economic benefit in each maintenance mode; respectively taking an overhaul mode with the largest economic benefit of the power grid in the operation problems of each power grid as an optimal overhaul mode corresponding to the operation problems of each power grid, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid;
and the scheduling scheme fault processing module is used for repairing the real-time fault according to the overhaul mode scheduling scheme when the power grid has the real-time fault.
In a possible implementation manner of the second aspect, the data acquisition module includes: the power grid simulation model building unit;
the power grid simulation model construction unit is used for acquiring operation data when a power grid fails, debugging the numerical value of the simulation model by using simulation software until the debugged simulation model meets the experimental error requirement, and obtaining a power grid simulation model; the operation data during power grid overhaul comprise transmission line operation data, generator set operation data and transformer operation data.
In one possible implementation manner of the second aspect, according to the power grid operation problem corresponding to each fault, the overhaul mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit start-up mode of the power grid in the power grid simulation model, which specifically includes:
the specific expression of the set R of power grid operation problems is as follows:
R＝{R i |i＝1,2,…,n}
wherein i is a natural number other than 0;
according to each power grid operation problem, the direct current power of the power grid is adjusted through a power grid simulation model, the unit starting mode of the power grid is adjusted to carry out maintenance, the power grid operation problem is solved, the maintenance mode for solving each power grid operation problem is determined, and a set M of the maintenance modes is obtained, wherein the specific expression is as follows:
M＝{M i,j |j＝1,2,…,n}
wherein j is a natural number other than 0, M i,j For the power grid operation problem R i And (5) a corresponding j-th overhaul mode.
In one possible implementation manner of the second aspect, the economic benefit calculating module includes: the system comprises a first economic benefit calculating unit, a second economic benefit calculating unit and a power grid economic benefit calculating unit;
the first economic benefit calculation unit is used for determining the active power output of each unit in each maintenance mode according to the maintenance mode of each power grid operation problem, so as to obtain the first economic benefit in each maintenance mode;
the second economic benefit calculation unit is used for determining the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, so as to obtain the second economic benefit in each maintenance mode;
and the power grid economic benefit calculating unit is used for calculating the power grid economic benefit under each maintenance mode according to the first economic benefit and the second economic benefit.
In a possible implementation manner of the second aspect, according to the first economic benefit and the second economic benefit, the grid economic benefit under each overhaul mode is calculated, which specifically is:
first economic benefit C under each maintenance mode g The specific formula is as follows:
C g (P g (i,j))＝αP g (i,j)+K 1
wherein P is g (i, j) is an inspection mode M i,j The active power output of each unit is g is the number of units, alpha is the economic benefit coefficient of the unit output, K 1 Supplementing the economic benefit of the unit;
second economic benefit C under each maintenance mode h The specific formula is as follows:
C h (P h (i,j))＝βP h (i,j)+K 2
wherein P is h (i, j) is an inspection mode M i,j The active power output of each direct current is h is the direct current quantity, beta is the economic benefit coefficient of the direct current output, K 2 Supplementing the direct current economic benefit;
determining a maintenance mode M according to the first economic benefit and the second economic benefit i,j The economic benefit of the power grid is reduced; wherein, overhaul mode M i,j Corresponding power grid economic benefit C T The specific formula is as follows:
drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a scheduling method for a power grid fault maintenance mode according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dispatching system for power grid troubleshooting according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an economic benefit calculating module of a dispatching system for a power grid fault maintenance mode according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as a limitation on the order in which the steps are performed.
As shown in fig. 1, fig. 1 is a specific flow chart of a power grid fault overhaul method according to an embodiment of the present invention, where the power grid fault overhaul method according to the embodiment includes steps S1 to S4, and is described in detail as follows:
step S1, operation data of a power grid during fault is obtained, and a power grid simulation model is constructed;
in the step, according to the operation data of the power grid provided by the power grid dispatching operation mechanism during power grid faults, the operation data is input into power system simulation software to perform power grid simulation; the operation data during power grid faults comprise transmission line operation data, generator set operation data and transformer operation data.
Debugging the numerical value of the simulation model of the power system simulation software until the deviation between the voltage of each station in the debugged simulation model and the actual value is not more than 0.5%, and the deviation between the system frequency and the actual value is not more than 0.1%, so as to obtain a power grid simulation model; the power grid simulation model comprises mechanical equipment such as a power transmission line, a generator set, a transformer, a load, a high-voltage direct current and the like.
Step S2, traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; according to the power grid operation problems corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model;
traversing N-1 type faults and N-2 type faults in a power grid simulation model, and recording to obtain a set of power grid operation problems corresponding to each fault; the N-1 type fault is a fault which does not meet the N-1 type principle, and the N-1 type principle is that any element in the power system has no fault or is disconnected due to fault in a normal operation mode, the power system can keep stable operation and normal power supply, other elements are not overloaded, and the stable and continuous power supply capacity of the system can be kept; wherein each fault corresponds to zero or one grid operation problem.
Aiming at the power grid operation problem corresponding to each fault, the active power output of a unit and the active power output of direct current are changed to solve each power grid operation problem by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model, so that an overhaul mode for solving each power grid operation problem is determined, and a set of overhaul modes is obtained; each power grid operation problem corresponds to one or more overhaul modes, and the overhaul modes comprise active power output of a regulating unit and active power output of direct current.
In some embodiments, the step S2 includes:
the specific expression of the set R of power grid operation problems is as follows:
R＝{R i |i＝1,2,…,n}
wherein i is a natural number other than 0;
according to each power grid operation problem, the direct current power of the power grid is adjusted through a power grid simulation model, the unit starting mode of the power grid is adjusted to carry out maintenance, the power grid operation problem is solved, the maintenance mode for solving each power grid operation problem is determined, and a set M of the maintenance modes is obtained, wherein the specific expression is as follows:
M＝{M i,j |j＝1,2,…,n}
wherein j is a natural number other than 0, M i,j For the power grid operation problem R i And (5) a corresponding j-th overhaul mode.
Step S3, according to the overhaul modes of each power grid operation problem, obtaining the active power output of each unit and the active power output of each direct current in each overhaul mode, and calculating the power grid economic benefit in each overhaul mode; respectively taking an overhaul mode with the largest economic benefit of the power grid in the operation problems of each power grid as an optimal overhaul mode corresponding to the operation problems of each power grid, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid;
in the step, according to each maintenance mode, the change of the active power output and the direct current active power output of the unit is obtained; the change of the active power output of the unit and the active power output of the direct current can influence the economic benefit of the power grid generated by the operation of the power grid, so the economic benefit of the power grid in each maintenance mode can be calculated according to the active power output of the unit and the active power output of the direct current in each maintenance mode; wherein the change of the active power output of each unit and the change of the direct current active power output can not influence each other
And then taking the overhaul mode which can obtain the maximized economic benefit in the operation problems of each power grid as the optimal overhaul mode corresponding to the operation problems of each power grid with the aim of maximizing the economic benefit, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid.
In some embodiments, the step S3 includes:
according to the overhaul mode of each power grid operation problem, determining the active power output of each unit in each overhaul mode to obtain the first economic benefit in each overhaul mode; wherein, the first economic benefit C under each maintenance mode g The specific formula is as follows:
C g (P g (i,j))＝αP g (i,j)+K 1
wherein P is g (i, j) is an inspection mode M i,j The active power output of each unit is g is the number of units, alpha is the economic benefit coefficient of the unit output, K 1 Supplementing the economic benefit of the unit;
determining the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, and obtaining the second economic benefit in each maintenance mode; wherein, the second economic benefit C under each maintenance mode h The specific formula is as follows:
C h (P h (i,j))＝βP h (i,j)+K 2
wherein P is h (i, j) is an inspection mode M i,j The active power output of each direct current is h is the direct current quantity, beta is the economic benefit coefficient of the direct current output, K 2 Supplementing the direct current economic benefit;
calculating to obtain the economic benefit of the power grid in each maintenance mode according to the first economic benefit and the second economic benefit; wherein, overhaul mode M i,j Corresponding power grid economic benefit C T The specific formula is as follows:
s4, when the power grid has a real-time fault, repairing the real-time fault according to the maintenance mode scheduling scheme;
in the step, when the actual fault occurs in the power grid, an optimal overhaul mode is called to generate an overhaul mode scheduling scheme to repair the real-time fault, so that the influence on the economic benefit of the power grid generated by the operation of the power grid is minimized.
Further, in order to execute the scheduling method of the power grid fault maintenance mode corresponding to the above method embodiment to implement the response function and the technical effect, fig. 2 provides a schematic structural diagram of a scheduling system of the power grid fault maintenance mode. For convenience of explanation, only the portion relevant to the embodiment is shown, and the scheduling system of the power grid fault maintenance mode provided by the embodiment of the invention includes:
the data acquisition module 201 is used for acquiring operation data during power grid overhaul and constructing a power grid simulation model;
the fault recording module 202 is configured to traverse all faults of the power grid according to the power grid simulation model, and obtain a set of power grid operation problems corresponding to each fault; wherein the faults include N-1 faults and N-2 faults;
the overhaul mode recording module 203 is configured to obtain an overhaul mode of each power grid operation problem by adjusting a direct current power of the power grid and a unit start-up mode of the power grid in the power grid simulation model according to the power grid operation problem corresponding to each fault; wherein, each power grid operation problem corresponds to one or more maintenance modes, and the maintenance modes comprise active power output of a regulating unit and active power output of direct current;
the economic benefit calculating module 204 is configured to obtain an active power output of each unit and an active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, and calculate a power grid economic benefit in each maintenance mode;
the scheduling scheme generating module 205 is configured to respectively use an overhaul mode with the largest economic benefit of the power grid in the operation problems of each power grid as an optimal overhaul mode corresponding to the operation problems of each power grid, and generate an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid;
and the scheduling scheme application module 206 is configured to repair the real-time fault according to the overhaul mode scheduling scheme when the power grid fails in real time.
In some embodiments, the data acquisition module 201 includes:
the power grid simulation model construction unit 201.1 is configured to obtain operation data of a power grid provided by a power grid dispatching operation mechanism when the power grid fails, and input the operation data into power system simulation software to perform power grid simulation; the operation data during power grid faults comprise transmission line operation data, generator set operation data and transformer operation data.
Debugging the numerical value of the simulation model of the power system simulation software until the deviation between the voltage of each station in the debugged simulation model and the actual value is not more than 0.5%, and the deviation between the system frequency and the actual value is not more than 0.1%, so as to obtain a power grid simulation model; the power grid simulation model comprises mechanical equipment such as a power transmission line, a generator set, a transformer, a load, a high-voltage direct current and the like.
In some embodiments, the fault logging module 202 includes:
traversing N-1 type faults and N-2 type faults in the power grid simulation model, and recording to obtain a set of power grid operation problems corresponding to each fault; the N-1 type fault is a fault which does not meet the N-1 type principle, and the N-1 type principle is that any element in the power system has no fault or is disconnected due to fault in a normal operation mode, the power system can keep stable operation and normal power supply, other elements are not overloaded, and the stable and continuous power supply capacity of the system can be kept; wherein each fault corresponds to zero or one grid operation problem.
In some embodiments, the maintenance mode recording module 203 includes:
aiming at the power grid operation problem corresponding to each fault, the active power output of a unit and the active power output of direct current are changed to solve each power grid operation problem by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model, so that an overhaul mode for solving each power grid operation problem is determined, and a set of overhaul modes is obtained; each power grid operation problem corresponds to one or more overhaul modes, and the overhaul modes comprise active power output of a regulating unit and active power output of direct current.
The specific expression of the set R of power grid operation problems is as follows:
R＝{R i |i＝1,2,…,n}
wherein i is a natural number other than 0;
according to each power grid operation problem, the direct current power of the power grid is adjusted through a power grid simulation model, the unit starting mode of the power grid is adjusted to carry out maintenance, the power grid operation problem is solved, the maintenance mode for solving each power grid operation problem is determined, and a set M of the maintenance modes is obtained, wherein the specific expression is as follows:
M＝{M i,j |j＝1,2,…,n}
wherein j is a natural number other than 0, M i,j For the power grid operation problem R i And (5) a corresponding j-th overhaul mode.
In some embodiments, the economic benefits calculation module 204 includes:
the first economic benefit calculating unit 204.1 is configured to determine an active power output of each unit in each maintenance mode according to the maintenance mode of each power grid operation problem, so as to obtain a first economic benefit in each maintenance mode;
the second economic benefit calculating unit 204.2 is configured to determine an active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, so as to obtain a second economic benefit in each maintenance mode;
and the power grid economic benefit calculating unit 204.3 is configured to calculate and obtain the power grid economic benefit under each maintenance mode according to the first economic benefit and the second economic benefit.
According to each maintenance mode, the change of the active power output and the direct current active power output of the unit is obtained; the change of the active power output of the unit and the active power output of the direct current can influence the economic benefit of the power grid generated by the operation of the power grid, so the economic benefit of the power grid in each maintenance mode can be calculated according to the active power output of the unit and the active power output of the direct current in each maintenance mode; wherein, the change of the active power output of each unit and the change of the direct current active power output can not influence each other.
And then taking the overhaul mode which can obtain the maximized economic benefit in the operation problems of each power grid as the optimal overhaul mode corresponding to the operation problems of each power grid with the aim of maximizing the economic benefit, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid.
Wherein, the first economic benefit C under each maintenance mode g The specific formula is as follows:
C g (P g (i,j))＝αP g (i,j)+K 1
wherein P is g (i, j) is an inspection mode M i,j The active power output of each unit is g is the number of units, alpha is the economic benefit coefficient of the unit output, K 1 Supplementing the economic benefit of the unit;
wherein, the second economic benefit C under each maintenance mode h The specific formula is as follows:
C h (P h (i,j))＝βP h (i,j)+K 2
wherein P is h (i, j) is an inspection mode M i,j The active power output of each direct current is h is the direct current quantity, beta is the economic benefit coefficient of the direct current output, K 2 Supplementing the direct current economic benefit;
wherein, overhaul mode M i,j Corresponding power grid economic benefit C T The specific formula is as follows:
the embodiment provides a scheduling method and a system for a power grid fault overhaul mode: acquiring operation data of a power grid during fault, and constructing a power grid simulation model; traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; wherein the faults include N-1 faults and N-2 faults; according to the power grid operation problems corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model; wherein, each power grid operation problem corresponds to one or more maintenance modes, and the maintenance modes comprise active power output of a regulating unit and active power output of direct current; according to the overhaul mode of each power grid operation problem, the active power output of each unit and the active power output of each direct current in each overhaul mode are obtained, and the power grid economic benefit in each overhaul mode is calculated; respectively taking an overhaul mode with the largest economic benefit of the power grid in the operation problems of each power grid as an optimal overhaul mode corresponding to the operation problems of each power grid, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid; and when the power grid has real-time faults, repairing the real-time faults according to the overhaul mode scheduling scheme. The beneficial effects are that: by calculating the influence of the power grid overhaul mode on the economic benefit of the power grid operation, a power grid fault overhaul scheme aiming at minimizing the economic loss is provided, so that the economic benefit of the power grid operation is maximized.
The above embodiments are provided to further illustrate the objects, technical solutions and advantageous effects of the present invention. It should be understood that the foregoing is only illustrative of the present invention and is not intended to limit the scope of the present invention. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The power grid fault overhaul mode scheduling method is characterized by comprising the following steps of:
acquiring operation data of a power grid during fault, and constructing a power grid simulation model;
traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; wherein the faults include N-1 faults and N-2 faults;
according to the power grid operation problems corresponding to each fault, a maintenance mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit starting mode of the power grid in a power grid simulation model; wherein, each power grid operation problem corresponds to one or more maintenance modes, and the maintenance modes comprise active power output of a regulating unit and active power output of direct current;
according to the overhaul mode of each power grid operation problem, the active power output of each unit and the active power output of each direct current in each overhaul mode are obtained, and the power grid economic benefit in each overhaul mode is calculated;
respectively taking an overhaul mode with the largest economic benefit of the power grid in the operation problems of each power grid as an optimal overhaul mode corresponding to the operation problems of each power grid, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid;
and when the power grid has real-time faults, repairing the real-time faults according to the overhaul mode scheduling scheme.
2. The method for dispatching a power grid fault maintenance mode according to claim 1, wherein the operation data of the power grid fault is obtained, and a power grid simulation model is constructed, specifically:
acquiring operation data of the power grid during fault, debugging the numerical value of the simulation model by using simulation software until the debugged simulation model meets the experimental error requirement, and obtaining the power grid simulation model; the operation data during power grid overhaul comprise transmission line operation data, generator set operation data and transformer operation data.
3. The method for dispatching the power grid fault overhaul mode according to claim 1, wherein the overhaul mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit start-up mode of the power grid in a power grid simulation model according to the power grid operation problem corresponding to each fault, specifically comprising the following steps:
the specific expression of the set R of power grid operation problems is as follows:
R＝{R i |i＝1,2,…,n}
wherein i is a natural number other than 0;
according to each power grid operation problem, the direct current power of the power grid is adjusted through a power grid simulation model, the unit starting mode of the power grid is adjusted to carry out maintenance, the power grid operation problem is solved, the maintenance mode for solving each power grid operation problem is determined, and a set M of the maintenance modes is obtained, wherein the specific expression is as follows:
M＝{M i,j |j＝1,2,…,n}
wherein j is a natural number other than 0, M i,j For the power grid operation problem R i And (5) a corresponding j-th overhaul mode.
4. The method for dispatching the power grid fault maintenance mode according to claim 1, wherein the power grid economic benefit under each maintenance mode is calculated by obtaining the active power output of each unit and the active power output of each direct current under each maintenance mode according to the maintenance mode of each power grid operation problem, specifically comprising the following steps:
according to the overhaul mode of each power grid operation problem, determining the active power output of each unit in each overhaul mode to obtain the first economic benefit in each overhaul mode;
determining the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, and obtaining the second economic benefit in each maintenance mode;
and calculating the economic benefit of the power grid under each maintenance mode according to the first economic benefit and the second economic benefit.
5. The method for dispatching a power grid fault maintenance mode according to claim 4, wherein the calculating, according to the first economic benefit and the second economic benefit, the power grid economic benefit under each maintenance mode is specifically as follows:
first economic benefit C under each maintenance mode g The specific formula is as follows:
C g (P g (i,j))＝αP g (i,j)+K 1
wherein P is g (i, j) is an inspection mode M i,j The active power output of each unit is g is the number of units, alpha is the economic benefit coefficient of the unit output, K 1 Supplementing the economic benefit of the unit;
second economic benefit C under each maintenance mode h The specific formula is as follows:
C h (P h (i,j))＝βP h (i,j)+K 2
wherein P is h (i, j) is an inspection mode M i,j The active power output of each direct current is h is the direct current quantity, beta is the economic benefit coefficient of the direct current output, K 2 Supplementing the direct current economic benefit;
determining a maintenance mode M according to the first economic benefit and the second economic benefit i,j The economic benefit of the power grid is reduced; wherein, overhaul mode M i,j Corresponding power grid economic benefit C T The specific formula is as follows:
6. a power grid troubleshooting scheduling system, comprising: the system comprises a data acquisition module, a fault recording module, an overhaul mode recording module, an economic benefit calculating module, a scheduling scheme generating module and a scheduling scheme application module;
the data acquisition module is used for acquiring operation data during power grid overhaul and constructing a power grid simulation model;
the fault recording module is used for traversing all faults of the power grid according to the power grid simulation model to obtain a set of power grid operation problems corresponding to each fault; wherein the faults include N-1 faults and N-2 faults;
the overhaul mode recording module is used for obtaining an overhaul mode of each power grid operation problem by adjusting the direct current power of the power grid and the unit start-up mode of the power grid in the power grid simulation model according to the power grid operation problem corresponding to each fault; wherein, each power grid operation problem corresponds to one or more maintenance modes, and the maintenance modes comprise active power output of a regulating unit and active power output of direct current;
the economic benefit calculation module is used for obtaining the active power output of each unit and the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, and calculating the power grid economic benefit in each maintenance mode;
the scheduling scheme generating module is used for respectively taking an overhaul mode with the largest economic benefit of the power grid in the operation problems of each power grid as an optimal overhaul mode corresponding to the operation problems of each power grid, and generating an overhaul mode scheduling scheme according to the optimal overhaul mode corresponding to the operation problems of each power grid;
and the scheduling scheme application module is used for repairing the real-time faults according to the overhaul mode scheduling scheme when the power grid has the real-time faults.
7. The grid troubleshooting scheduling system of claim 6, wherein said data acquisition module includes: the power grid simulation model building unit;
the power grid simulation model construction unit is used for acquiring operation data when a power grid fails, debugging the numerical value of the simulation model by using simulation software until the debugged simulation model meets the experimental error requirement, and obtaining a power grid simulation model; the operation data during power grid overhaul comprise transmission line operation data, generator set operation data and transformer operation data.
8. The dispatching system of the power grid fault overhaul mode according to claim 6, wherein the overhaul mode of each power grid operation problem is obtained by adjusting the direct current power of the power grid and the unit start-up mode of the power grid in a power grid simulation model according to the power grid operation problem corresponding to each fault, specifically comprising the following steps:
the specific expression of the set R of power grid operation problems is as follows:
R＝{R i |i＝1,2,…,n}
wherein i is a natural number other than 0;
according to each power grid operation problem, the direct current power of the power grid is adjusted through a power grid simulation model, the unit starting mode of the power grid is adjusted to carry out maintenance, the power grid operation problem is solved, the maintenance mode for solving each power grid operation problem is determined, and a set M of the maintenance modes is obtained, wherein the specific expression is as follows:
M＝{M i,j |j＝1,2,…,n}
wherein j is a natural number other than 0, M i,j For the power grid operation problem R i And (5) a corresponding j-th overhaul mode.
9. The grid troubleshooting scheduling system of claim 6, wherein said economic benefit computing module includes: the system comprises a first economic benefit calculating unit, a second economic benefit calculating unit and a power grid economic benefit calculating unit;
the first economic benefit calculation unit is used for determining the active power output of each unit in each maintenance mode according to the maintenance mode of each power grid operation problem, so as to obtain the first economic benefit in each maintenance mode;
the second economic benefit calculation unit is used for determining the active power output of each direct current in each maintenance mode according to the maintenance mode of each power grid operation problem, so as to obtain the second economic benefit in each maintenance mode;
and the power grid economic benefit calculating unit is used for calculating the power grid economic benefit under each maintenance mode according to the first economic benefit and the second economic benefit.
10. The grid fault overhaul mode scheduling system according to claim 9, wherein the calculating, according to the first economic benefit and the second economic benefit, the grid economic benefit under each overhaul mode is specifically:
first economic benefit C under each maintenance mode g The specific formula is as follows:
C g (P g (i,j))＝αP g (i,j)+K 1
wherein P is g (i, j) is an inspection mode M i,j The active power output of each unit is g is the number of units, alpha is the economic benefit coefficient of the unit output, K 1 Supplementing the economic benefit of the unit;
second economic benefit C under each maintenance mode h The specific formula is as follows:
C h (P h (i,j))＝βP h (i,j)+K 2
wherein P is h (i, j) is an inspection mode M i,j The active power output of each direct current is h is the direct current quantity, beta is the economic benefit coefficient of the direct current output, K 2 Supplementing the direct current economic benefit;
determining a maintenance mode M according to the first economic benefit and the second economic benefit i,j The economic benefit of the power grid is reduced; wherein, overhaul mode M i,j Corresponding power grid economic benefit C T The specific formula is as follows:
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