CN111817305B - Power grid operation efficiency post-evaluation method and system for capacity increase of power transmission and transformation equipment - Google Patents
Power grid operation efficiency post-evaluation method and system for capacity increase of power transmission and transformation equipment Download PDFInfo
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Abstract
The invention discloses a method and a system for evaluating the operation efficiency of a power grid of capacity increase of power transmission and transformation equipment, which are used for acquiring historical information of the normal operation state of the power grid after the capacity increase of the power transmission and transformation equipment and generating an emergency control scene set; calculating to obtain the total safety and stability emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safety and stability emergency control cost after the capacity increase of the power transmission and transformation equipment; screening out a scene of the limit before the power transmission channel increases the capacity of the power transmission and transformation equipment, and generating a prevention control scene set; calculating the total cost of prevention and control; and determining the evaluation result after the operation efficiency of the power grid of the capacity increase of the power transmission and transformation equipment is determined. The advantages are that: the method can directly and objectively reflect the actual effect of power transmission and transformation capacity increase, realizes the evaluation of the power grid operation efficiency of the power transmission and transformation capacity increase, and can provide a basis for scientific decision of capacity increase transformation of power transmission and transformation equipment.
Description
Technical Field
The invention relates to a post-evaluation method and a post-evaluation system for the operation efficiency of a power grid for capacity increase of power transmission and transformation equipment, and belongs to the technical field of planning and operation of power systems.
Background
The current-carrying capacity of the power transmission and transformation equipment is a key factor influencing the power transmission capacity of a power grid, and is comprehensively influenced by equipment parameters, equipment states, environmental factors and the like. And (4) formulating a power grid operation mode according to the equipment static current carrying capacity determined under the conservative condition, and carrying out power grid dispatching operation control, wherein the utilization rate of the equipment is not high.
The on-line monitoring device is arranged on the line, the transformer, the disconnecting link and other equipment, the equipment state monitoring information is collected, the real-time meteorological information and the medium-and long-term meteorological information are combined, the current carrying capacity of the equipment under real-time, short-term and medium-and long-term multi-time scales can be analyzed on line, and the conveying capacity of the existing equipment is fully excavated and improved. The prior art focuses on how to improve the current carrying capacity of equipment and the evaluation accuracy of a power transmission channel, and avoids the safety risk of the equipment and the power transmission channel which operate according to the current carrying capacity after capacity increase.
The method for carrying out capacity increase transformation on the power transmission and transformation equipment needs investment, and because the method for evaluating the operation efficiency improvement degree of the power grid after the capacity increase of the power transmission and transformation equipment is lacked at present, the capacity increase decision of the power transmission and transformation can only be carried out by empirical estimation, and the scientific decision of the capacity increase transformation of the power transmission and transformation equipment is difficult to carry out.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a system for evaluating the operation efficiency of a power grid for capacity increase of power transmission and transformation equipment, which support investment decision of capacity increase transformation of power transmission and transformation.
In order to solve the technical problems, the invention provides a power grid operation efficiency post-evaluation method for power transmission and transformation equipment capacity increase, which comprises the steps of obtaining historical information of a normal operation state of a power grid after the capacity increase of the power transmission and transformation equipment, and generating an emergency control scene set;
calculating to obtain the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment according to the emergency control scene set;
screening out a scene of the limit before the power transmission channel increases the capacity of the power transmission and transformation equipment from the emergency control scene to generate a prevention control scene set;
calculating the total prevention control cost for adjusting the running state of the power grid to be not more than the limit before the capacity increase of the power transmission and transformation according to the prevention control scene set;
and adding the difference value of the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment to the total prevention control cost, and determining the evaluation result after the operation efficiency of the power grid of the capacity increase of the power transmission and transformation equipment.
Further, the process of acquiring historical information of the normal operation state of the power grid after the capacity increase of the power transmission and transformation equipment and generating the emergency control scene set includes:
acquiring historical information of a normal operation state of a power grid after capacity increase of power transmission and transformation equipment, sampling the historical information of the normal operation state of the power grid according to a set sampling interval, and generating an emergency control scene set S for calculating emergency control cost;
each scene comprises a power grid load flow calculation result, a commissioning state of a safety and stability emergency control system, the occurrence probability of each expected fault in an expected fault set F, F defended by the safety and stability emergency control system, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before the capacity increase of the power transmission and transformation equipment, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system after the capacity increase of the power transmission and transformation equipment, a safety and stability monitoring channel set T, the limit of each safety and stability monitoring channel in the T before the capacity increase of the power transmission and transformation equipment, and an adjustable space of each preventive control measure in a preventive control measure set C, C;
the safety and stability emergency control system comprises all safety and stability emergency control systems in a power grid, wherein the control strategies before and after capacity increase of the power transmission and transformation equipment and the fixed values of the control strategies are not completely the same;
the probability of the expected fault is the probability of the expected fault occurring at the corresponding moment of the scene;
the preventive control measures comprise power regulation, load regulation and external network injection power regulation of the power station.
Further, the step of calculating the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment according to the emergency control scene set includes:
aiming at each scene in S, searching control measures of each expected fault in F according to a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before and after capacity increase of the power transmission and transformation equipment respectively under the commissioning condition of the safety and stability emergency control system, calculating the probability of each expected fault in F, and calculating the safety and stability emergency control cost of the power transmission and transformation equipment before capacity increase and the safety and stability emergency control cost of the power transmission and transformation equipment after capacity increase corresponding to the scene;
summing the safety and stability emergency control costs of the electric transmission and transformation equipment corresponding to all the scenes in the S before capacity increasing to obtain the total safety and stability emergency control cost of the electric transmission and transformation equipment before capacity increasing;
and summing the safe and stable emergency control costs of the power transmission and transformation equipment corresponding to all the scenes in the S after capacity increase to obtain the total safe and stable emergency control cost of the power transmission and transformation equipment after capacity increase.
Further, the step of screening out a scene of capacity increase front limit of the power transmission channel beyond the power transmission and transformation equipment from the emergency control scene to generate a prevention control scene set includes:
and aiming at each scene in the S, calculating the active power of each safety and stability monitoring channel in the T according to the power grid load flow calculation result of the scene, and taking the scene that the active power of at least one safety and stability monitoring channel in the T is larger than the limit of the power transmission and transformation equipment before capacity increase as the scene of the preventive control scene set W.
Further, the process of calculating, according to the prevention control scenario set, a total prevention control cost for adjusting the power grid operating state to not exceed the pre-capacity limit of power transmission and transformation capacity increase includes:
aiming at each scene in W, respectively establishing a prevention control decision optimization model taking the minimum total cost of the prevention and control measures in C as an optimization target, considering that the adjustable space of the prevention and control measures in C, the power balance of the power grid and the active power of each safety and stability monitoring channel in T are not greater than the limit of the safety and stability monitoring channel before the capacity increase of the power transmission and transformation equipment as constraint conditions, and obtaining the prevention and control cost of the scene in C through optimization calculation;
and summing the preventive control costs corresponding to all scenes in the W to determine the total preventive control cost.
A power transmission and transformation equipment capacity-increased power grid operation efficiency post-evaluation system comprises:
the information acquisition and emergency control scene set generation module is used for acquiring historical information of the normal running state of the power grid after the capacity increase of the power transmission and transformation equipment and generating an emergency control scene set;
the emergency control cost calculation module is used for calculating and obtaining the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment according to the emergency control scene set;
the device comprises a preventive control scene set generation module, a data acquisition module and a data processing module, wherein the preventive control scene set generation module is used for screening a scene of limit before the power transmission channel is increased beyond the power transmission and transformation equipment from an emergency control scene to generate a preventive control scene set;
the prevention control cost calculation module is used for calculating the total prevention control cost for adjusting the running state of the power grid to be not more than the limit before the capacity increase of the power transmission and transformation according to the prevention control scene set;
and the power grid operation efficiency evaluation module is used for adding the difference value of the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment to the total preventive control cost to determine the evaluation result after the power grid operation efficiency of the capacity increase of the power transmission and transformation equipment.
Further, the information acquisition and emergency control scene set generation module includes:
the acquisition module is used for acquiring historical information of the normal running state of the power grid after the capacity increase of the power transmission and transformation equipment;
the generating module is used for sampling historical information of a normal operation state of the power grid according to a set sampling interval and generating an emergency control scene set S for calculating emergency control cost;
each scene comprises a power grid load flow calculation result, a commissioning state of a safety and stability emergency control system, the occurrence probability of each expected fault in an expected fault set F, F defended by the safety and stability emergency control system, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before the capacity increase of the power transmission and transformation equipment, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system after the capacity increase of the power transmission and transformation equipment, a safety and stability monitoring channel set T, the limit of each safety and stability monitoring channel in the T before the capacity increase of the power transmission and transformation equipment, and an adjustable space of each preventive control measure in a preventive control measure set C, C;
the safety and stability emergency control system comprises all safety and stability emergency control systems in a power grid, wherein the control strategies before and after capacity increase of the power transmission and transformation equipment and the fixed values of the control strategies are not completely the same;
the probability of the expected fault is the probability of the expected fault occurring at the corresponding moment of the scene;
the preventive control measures comprise power regulation, load regulation and external network injection power regulation of the power station.
Further, the emergency control cost calculation module includes:
the first calculation module is used for searching control measures of each expected fault in the F according to the control strategy and the fixed value of the control strategy of the safety and stability emergency control system before and after capacity increase of the power transmission and transformation equipment under the operation condition of the safety and stability emergency control system aiming at each scene in the S, calculating the probability of each expected fault in the F, and calculating the safety and stability emergency control cost of the power transmission and transformation equipment before and after capacity increase of the power transmission and transformation equipment corresponding to the scene;
the second calculation module is used for summing the safety and stability emergency control costs of the electric transmission and transformation equipment corresponding to all the scenes in the S before capacity increase to serve as the total safety and stability emergency control cost of the electric transmission and transformation equipment before capacity increase; and summing the safe and stable emergency control costs of the power transmission and transformation equipment corresponding to all the scenes in the S after capacity increase to obtain the total safe and stable emergency control cost of the power transmission and transformation equipment after capacity increase.
Further, the preventive control scenario set generation module includes:
the third calculation module is used for calculating the active power of each safety and stability monitoring channel in the T according to the power grid load flow calculation result of the scene aiming at each scene in the S;
and the first determining module is used for determining a scene that the active power of at least one safety and stability monitoring channel in the T is greater than the limit of the power transmission and transformation equipment before capacity increase as a scene of the preventive control scene set W.
Further, the power grid operation performance evaluation module comprises:
the fourth calculation module is used for establishing a preventive control decision optimization model which takes the minimum total cost of preventive control measures in the step C as an optimization target, takes the adjustable space of the preventive control measures in the step C, balances the power of the power grid and takes the limit of each safety and stability monitoring channel in the step T before the power transmission and transformation equipment is increased in power as a constraint condition and obtains the preventive control cost of the scene in the step C through optimization calculation aiming at each scene in the step W respectively based on the power grid load flow calculation result of the scene;
and the second determining module is used for summing the preventive control costs corresponding to all the scenes in the W to determine the total preventive control cost.
The invention achieves the following beneficial effects:
according to the actual operation data of the power grid after the power transmission and transformation capacity increase, the safety and stability emergency control cost is counted, and the safety and stability emergency control cost before the power transmission and transformation capacity increase is calculated by changing the control strategy and the fixed value; and (4) adjusting the active power of the power transmission channel monitored safely and stably to be not more than the limit before the capacity increase of the power transmission and transformation by optimization, and calculating the prevention and control cost. The sum of the reduction amount of the safe and stable emergency control cost and the prevention control cost is used as the improvement amount of the operation efficiency of the power grid after the power transmission and transformation capacity increase reflected by the economic benefit, the actual effect of the power transmission and transformation capacity increase is directly and objectively reflected, the power grid operation efficiency after the power transmission and transformation capacity increase is evaluated, and a basis can be provided for scientific decision of capacity increase improvement of power transmission and transformation equipment.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, a post-evaluation method for power grid operation performance of capacity increase of power transmission and transformation equipment includes the following steps:
step 1: acquiring historical information of the normal operation state of the power grid after the capacity increase of the power transmission and transformation equipment, sampling the historical information of the normal operation state of the power grid according to a set sampling interval (generally set to be 15 minutes), generating a scene set S for calculating the emergency control cost, each scene comprises a power grid load flow calculation result, a commissioning state of a safety and stability emergency control system, the occurrence probability of each expected fault in an expected fault set F, F defended by the safety and stability emergency control system, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before the capacity increase of the power transmission and transformation equipment, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system after the capacity increase of the power transmission and transformation equipment, a safety and stability monitoring channel set T, the limit of each safety and stability monitoring channel in the T before the capacity increase of the power transmission and transformation equipment, and an adjustable space of each preventive control measure in a preventive control measure set C, C;
the safety and stability emergency control system comprises all safety and stability emergency control systems in a power grid, wherein the control strategies before and after capacity increase of the power transmission and transformation equipment and the fixed values of the control strategies are not completely the same; the probability of the expected fault is the probability of the expected fault occurring at the corresponding moment of the scene; the preventive control measures comprise power regulation, load regulation and external network injection power regulation of the power station.
Step 2: comprises two parallel processing parts of emergency control total cost calculation and prevention control total cost calculation,
(1) emergency control total cost calculation
Aiming at each scene in the S, searching control measures of each expected fault in the F according to a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before and after capacity increase of the power transmission and transformation equipment respectively under the commissioning condition of the safety and stability emergency control system, calculating the probability of each expected fault in the F, and calculating the total safety and stability emergency control cost of the power transmission and transformation equipment before capacity increase and the total safety and stability emergency control cost of the power transmission and transformation equipment after capacity increase corresponding to the scene;
wherein, the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment corresponding to each scene in the S are respectively calculated by a formula (1) and a formula (2),
ce.i.b＝∑j∈F(pi.jci.j.b)i∈S,j∈F (1)
ce.i＝∑j∈F(pi.jci.j)i∈S,j∈F (2)
in the formula, ce.i.b、ce.iRespectively corresponding to the scene i in S, the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment, pi.jIs the probability of occurrence of an expected failure j at the time F corresponding to the scene i in S, ci.j.b、ci.jAfter the expected fault j occurs in F corresponding to the scene i in S, the expected fault j is respectively applied to the power gridThe cost of the safety and stability emergency control measures before the capacity increase of the power transmission and transformation equipment is implemented and the cost of the safety and stability emergency control measures after the capacity increase of the power transmission and transformation equipment is implemented on the power grid.
(2) Preventive control total cost calculation
Aiming at each scene in the S, calculating the active power of each safety and stability monitoring channel in the T according to the power grid load flow calculation result of the scene, and taking the scene that the active power of at least one safety and stability monitoring channel in the T is larger than the limit of the power transmission and transformation equipment before capacity increase as the scene of a prevention control scene set W to obtain W;
aiming at each scene in W, respectively establishing a preventive control decision optimization model taking the minimum total cost of preventive control measures in C as an optimization target and considering that the adjustable space of the preventive control measures in C, the power balance of the power grid and the active power of each safety and stability monitoring channel in T are not more than the limit of the safety and stability monitoring channel before the capacity increase of the power transmission and transformation equipment as constraint conditions based on the power flow calculation result of the scene, and obtaining the total cost of the preventive control measures in C through optimization calculation;
wherein the preventive control decision optimization model of each scene in W is specifically,
where Δ t is the set sampling interval, Pl.w.0The active power of a load l in a scene W corresponding to a moment C in W, x is electric quantity, fl.w(x) Is a power consumption cost function P of the load l in the time delta t corresponding to the moment C in the scene W in Wg.w.0The active power output f of the power station g at the moment C corresponding to the scene W in Wg.w(x) Is a power generation cost function P of the power generation station g in the time delta t in the scene W corresponding to the time C in Wa.w.0Injecting active power of the node a into the external network at the moment C corresponding to the scene W in W, and injecting f into the external network at the moment C corresponding to the scene W in Wa.w.b(x) The function f of the electricity purchase cost of the injection node a of the external network in delta t time in the scene W corresponding to the moment C in Wa.w(x) The power selling cost function P of the external network injection node a in the delta t time at the moment C corresponding to the scene W in Wl.w.1、Pg.w.1、Pa.w.1Respectively an active variable of a load l in a scene W in W at a corresponding moment C, an active output variable of a power generation station g in C and an active injection variable of an external network injection node a in C, Pl.w.u、Pl.w.dRespectively is the upper limit and the lower limit of the active adjustable space of the load l in the scene W corresponding to the moment C in the time delta t, Pg.w.u、Pg.w.dRespectively is the upper limit and the lower limit of the active output adjustable space of the power station g in the time C corresponding to the scene W in W in delta t time, Pa.w.u、Pa.w.dRespectively is the upper limit and the lower limit of active injection adjustable space of the external network injection node a in the time delta t in the scene W corresponding to the moment C in the W, Pk.w.0The active power s of the channel k is monitored for safety and stability in the scene W corresponding to the moment T in Wl.w.kThe active sensitivity, s, of the load l active in the scene W corresponding to the moment C in W to the safety and stability monitoring channel k in Tg.w.kThe active output of the power station g at the moment C corresponding to the scene W in W has the active sensitivity s to the safety and stability monitoring channel k in Ta.w.kInjecting active power of the node a into the external network at the moment C corresponding to the scene W in the W to monitor the active power sensitivity of the channel k in the T in the safety and stability manner, Pk.w.lmt.1And limiting the safety and stability monitoring channel k in the T before capacity increase of the power transmission and transformation equipment at the moment corresponding to the scene W in the W.
In the optimization process, when the energy storage power station is in a discharging state, the energy storage power station is processed according to the power generation station, and when the energy storage power station is in a charging state, the energy storage power station is processed according to the load.
And step 3: taking the difference value of the sum of the total safe and stable emergency control costs of the electric transmission and transformation equipment before capacity increase and the sum of the total safe and stable emergency control costs of the electric transmission and transformation equipment after capacity increase as the reduction amount of the safe and stable emergency control costs of the electric network of the electric transmission and transformation equipment capacity increase; taking the sum of the total cost of the preventive control measures in the step C corresponding to each scene in the step W as the increment of the power transmission benefit of the power grid for capacity increase of the power transmission and transformation equipment; and taking the sum of the reduction of the safe and stable emergency control cost of the power grid subjected to capacity increase of the power transmission and transformation equipment and the power grid transmission benefit increase of the capacity increase of the power transmission and transformation equipment as an evaluation result after the operation efficiency of the power grid subjected to capacity increase of the power transmission and transformation equipment.
A post-operational performance evaluation system for a power grid augmented by power transmission and transformation equipment, the system comprising:
the information acquisition and emergency control scene set generation module: used for obtaining the historical information of the normal operation state of the power grid after the capacity increase of the power transmission and transformation equipment, sampling the historical information of the normal operation state of the power grid according to the set sampling interval, generating a scene set S for calculating the emergency control cost, each scene comprises a power grid load flow calculation result, a commissioning state of a safety and stability emergency control system, the occurrence probability of each expected fault in an expected fault set F, F defended by the safety and stability emergency control system, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before the capacity increase of the power transmission and transformation equipment, a control strategy and a fixed value of the control strategy of the safety and stability emergency control system after the capacity increase of the power transmission and transformation equipment, a safety and stability monitoring channel set T, the limit of each safety and stability monitoring channel in the T before the capacity increase of the power transmission and transformation equipment, and an adjustable space of each preventive control measure in a preventive control measure set C, C;
an emergency control cost calculation module: the method is used for searching control measures of various expected faults in the F according to control strategies and fixed values of the control strategies of the safety and stability emergency control system before and after capacity increase of the power transmission and transformation equipment under the condition that the safety and stability emergency control system is put into operation aiming at various scenes in the S, calculating the total safety and stability emergency control cost of the power transmission and transformation equipment before capacity increase and the total safety and stability emergency control cost of the power transmission and transformation equipment after capacity increase according to the probability of occurrence of various expected faults in the F;
a preventive control scenario set generation module: the method comprises the steps that for each scene in the S, the active power of each safety and stability monitoring channel in the T is calculated according to the power grid load flow calculation result of the scene, at least one scene that the active power of the safety and stability monitoring channel in the T is larger than the limit of the power transmission and transformation equipment before capacity increase is carried out is used as a scene of a preventive control scene set W, and the W is obtained;
a prevention control cost calculation module: the method comprises the steps of establishing a preventive control decision optimization model which takes the minimum total cost of preventive control measures in the step C as an optimization target, takes the adjustable space of the preventive control measures in the step C, the power balance of the power grid and the active power of each safety and stability monitoring channel in the step T not larger than the limit of the safety and stability monitoring channel before the capacity increase of power transmission and transformation equipment as constraint conditions, and obtaining the total cost of the preventive control measures in the step C through optimization calculation;
the power grid operation efficiency evaluation module: the difference value between the sum of the total safe and stable emergency control costs before the capacity increase of the power transmission and transformation equipment corresponding to each scene in the S and the sum of the total safe and stable emergency control costs after the capacity increase is used as the reduction amount of the safe and stable emergency control costs of the power grid of the capacity increase of the power transmission and transformation equipment; taking the sum of the total cost of the preventive control measures in the step C corresponding to each scene in the step W as the increment of the power transmission benefit of the power grid for capacity increase of the power transmission and transformation equipment; and taking the sum of the reduction of the safe and stable emergency control cost of the power grid subjected to capacity increase of the power transmission and transformation equipment and the power grid transmission benefit increase of the capacity increase of the power transmission and transformation equipment as an evaluation result after the operation efficiency of the power grid subjected to capacity increase of the power transmission and transformation equipment.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A post-evaluation method for the operation efficiency of a power grid for capacity increase of power transmission and transformation equipment is characterized in that,
acquiring historical information of a normal running state of a power grid after capacity increase of power transmission and transformation equipment, and generating an emergency control scene set;
calculating safety and stability emergency control costs before capacity increase of the power transmission and transformation equipment and safety and stability emergency control costs after capacity increase of the power transmission and transformation equipment corresponding to each emergency control scene in the emergency control scene set, and adding the safety and stability emergency control costs before capacity increase of the power transmission and transformation equipment corresponding to all the emergency control scenes to obtain total safety and stability emergency control costs before capacity increase of the power transmission and transformation equipment; adding the safety and stability emergency control costs of the power transmission and transformation equipment after capacity increase corresponding to all the emergency control fields to obtain the total safety and stability emergency control cost of the power transmission and transformation equipment after capacity increase;
screening out a scene of capacity increase front limit of the power transmission channel beyond the power transmission and transformation equipment from the emergency control scene set to generate a prevention control scene set;
calculating prevention control costs corresponding to each prevention control scene in the prevention control scene set for adjusting the power grid operation state to be not more than the power transmission and transformation capacity increase front limit, and adding the prevention control costs corresponding to all the prevention control scenes for adjusting the power grid operation state to be not more than the power transmission and transformation capacity increase front limit to obtain the total prevention control costs for adjusting the power grid operation state to be not more than the power transmission and transformation capacity increase front limit;
and calculating the difference value of the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment, and adding the difference value to the total preventive control cost to determine the evaluation result after the operation efficiency of the power grid of the capacity increase of the power transmission and transformation equipment.
2. The method for evaluating the power grid operation performance after power transmission and transformation equipment capacity increase according to claim 1, wherein the step of obtaining historical information of the normal operation state of the power grid after the power transmission and transformation equipment capacity increase and generating the emergency control scene set comprises the steps of:
acquiring historical information of a normal operation state of a power grid after capacity increase of power transmission and transformation equipment, sampling the historical information of the normal operation state of the power grid according to a set sampling interval, and generating an emergency control scene set S for calculating emergency control cost;
each scene comprises a power grid load flow calculation result, a commissioning state of a safety and stability emergency control system, an expected failure set F defended by the safety and stability emergency control system, the probability of occurrence of each expected failure in the expected failure set F, a control strategy of the safety and stability emergency control system and a fixed value of the control strategy before capacity increase of power transmission and transformation equipment, a control strategy of the safety and stability emergency control system and a fixed value of the control strategy after capacity increase of the power transmission and transformation equipment, a safety and stability monitoring channel set T, a limit of each safety and stability monitoring channel in the safety and stability monitoring channel set T before capacity increase of the power transmission and transformation equipment, a preventive control measure set C and an adjustable space of each preventive control measure in the preventive control measure set C;
the safety and stability emergency control system comprises all safety and stability emergency control systems in a power grid, wherein the control strategies before and after capacity increase of the power transmission and transformation equipment and the fixed values of the control strategies are not completely the same;
the probability of the expected fault is the probability of the expected fault occurring at the corresponding moment of the scene;
the preventive control measures comprise power regulation, load regulation and external network injection power regulation of the power station.
3. The method for evaluating the performance of the power grid after the capacity increase of the power transmission and transformation equipment according to claim 2, wherein the step of calculating the safety and stability emergency control cost before the capacity increase of the power transmission and transformation equipment and the safety and stability emergency control cost after the capacity increase of the power transmission and transformation equipment corresponding to each emergency control scene in the emergency control scene set comprises:
aiming at each scene in the emergency control scene set S, under the condition that the safety and stability emergency control system is put into operation, the control measures of each expected fault in the expected fault set F are searched according to the control strategy and the fixed value of the control strategy of the safety and stability emergency control system before and after capacity increase of the power transmission and transformation equipment respectively, the probability of each expected fault in the expected fault set F is calculated, and the safety and stability emergency control cost before capacity increase of the power transmission and transformation equipment and the safety and stability emergency control cost after capacity increase of the power transmission and transformation equipment corresponding to the scene are calculated.
4. The post-operation performance evaluation method for the power grid augmented by the electric transmission and transformation equipment according to claim 2, wherein the scene of the limit of the augmented capacity of the electric transmission channel beyond the electric transmission and transformation equipment is screened from the emergency control scene set, and the process of generating the prevention control scene set comprises the following steps:
and aiming at each scene in the emergency control scene set S, calculating the active power of each safety and stability monitoring channel in the safety and stability monitoring channel set T according to the power grid load flow calculation result of the scene, and taking the scene in which the active power of at least one safety and stability monitoring channel in the safety and stability monitoring channel set T is larger than the limit of the power transmission and transformation equipment before capacity increase as the scene of the preventive control scene set W.
5. The post-evaluation method for power grid operation performance of power transmission and transformation equipment capacity increase according to claim 4, wherein the step of calculating the prevention control cost for adjusting the power grid operation state to not exceed the power transmission and transformation capacity increase front limit corresponding to each prevention control scenario in the prevention control scenario set comprises:
aiming at each scene in a preventive control scene set W, a preventive control decision optimization model which takes the minimum total cost of preventive control measures in a preventive control measure set C as an optimization target and takes the adjustable space of the preventive control measures in the preventive control measure set C, the power balance of a power grid and each safety and stability monitoring channel in a safety and stability monitoring channel set T with the active value not larger than the limit of the power transmission and transformation equipment before capacity increase as a constraint condition is established based on the power grid load flow calculation result of the scene, and the preventive control cost of the scene in the preventive control measure set C is obtained through optimization calculation.
6. A power transmission and transformation equipment capacity-increased power grid operation efficiency post-evaluation system is characterized by comprising:
the information acquisition and emergency control scene set generation module is used for acquiring historical information of the normal running state of the power grid after the capacity increase of the power transmission and transformation equipment and generating an emergency control scene set;
the emergency control cost calculation module is used for calculating the safety and stability emergency control cost before the capacity increase of the power transmission and transformation equipment and the safety and stability emergency control cost after the capacity increase of the power transmission and transformation equipment corresponding to each emergency control scene in the emergency control scene set, and adding the safety and stability emergency control costs before the capacity increase of the power transmission and transformation equipment corresponding to all the emergency control scenes to obtain the total safety and stability emergency control cost before the capacity increase of the power transmission and transformation equipment; adding the safety and stability emergency control costs of the power transmission and transformation equipment after capacity increase corresponding to all the emergency control fields to obtain the total safety and stability emergency control cost of the power transmission and transformation equipment after capacity increase;
the preventive control scene set generating module is used for screening out scenes of the capacity increase front limit of the power transmission channel beyond the power transmission and transformation equipment from the emergency control scene set to generate a preventive control scene set;
the prevention control cost calculation module is used for calculating prevention control costs for adjusting the power grid operation state to be not more than the power transmission and transformation capacity increase front limit corresponding to each prevention control scene in the prevention control scene set, and adding the prevention control costs for adjusting the power grid operation state to be not more than the power transmission and transformation capacity increase front limit corresponding to all the prevention control scenes to obtain the total prevention control costs for adjusting the power grid operation state to be not more than the power transmission and transformation capacity increase front limit;
and the power grid operation efficiency evaluation module is used for calculating the sum of the difference value of the total safe and stable emergency control cost before the capacity increase of the power transmission and transformation equipment and the total safe and stable emergency control cost after the capacity increase of the power transmission and transformation equipment and the total preventive control cost, and determining the evaluation result after the power grid operation efficiency of the capacity increase of the power transmission and transformation equipment.
7. The post-operation performance evaluation system for the power transmission and transformation equipment-augmented power grid according to claim 6, wherein the information acquisition and emergency control scenario set generation module comprises:
the acquisition module is used for acquiring historical information of the normal running state of the power grid after the capacity increase of the power transmission and transformation equipment;
the generating module is used for sampling historical information of a normal operation state of the power grid according to a set sampling interval and generating an emergency control scene set S for calculating emergency control cost;
each scene comprises a power grid load flow calculation result, a commissioning state of a safety and stability emergency control system, an expected failure set F defended by the safety and stability emergency control system, the probability of occurrence of each expected failure in the expected failure set F, a control strategy of the safety and stability emergency control system and a fixed value of the control strategy before capacity increase of power transmission and transformation equipment, a control strategy of the safety and stability emergency control system and a fixed value of the control strategy after capacity increase of the power transmission and transformation equipment, a safety and stability monitoring channel set T, a limit of each safety and stability monitoring channel in the safety and stability monitoring channel set T before capacity increase of the power transmission and transformation equipment, a preventive control measure set C and an adjustable space of each preventive control measure in the preventive control measure set C;
the safety and stability emergency control system comprises all safety and stability emergency control systems in a power grid, wherein the control strategies before and after capacity increase of the power transmission and transformation equipment and the fixed values of the control strategies are not completely the same;
the probability of the expected fault is the probability of the expected fault occurring at the corresponding moment of the scene;
the preventive control measures comprise power regulation, load regulation and external network injection power regulation of the power station.
8. The power transmission and transformation equipment capacity-increased power grid operation efficiency post-evaluation system according to claim 7, wherein the emergency control cost calculation module is configured to search, for each scene in the emergency control scene set S, a control measure of each expected fault in the expected fault set F according to a control strategy and a fixed value of the control strategy of the safety and stability emergency control system before and after capacity-increase of the power transmission and transformation equipment, respectively, under a commissioning condition of the safety and stability emergency control system, calculate a probability of occurrence of each expected fault in the expected fault set F, and calculate a safety and stability emergency control cost before capacity-increase of the power transmission and transformation equipment and a safety and stability emergency control cost after capacity-increase of the power transmission and transformation equipment corresponding to the scene.
9. The post-operational performance evaluation system for a power transmission and transformation equipment-augmented electrical grid of claim 7, wherein the preventive control scenario set generation module comprises:
the third calculation module is used for calculating the active power of each safety and stability monitoring channel in the safety and stability monitoring channel set T according to the power grid load flow calculation result of each scene in the emergency control scene set S;
the first determining module is used for determining a scene that at least one safety and stability monitoring channel in the safety and stability monitoring channel set T has an active power larger than the limit of the power transmission and transformation equipment before capacity increase as a scene of the preventive control scene set W.
10. The post-operational performance evaluation system for an electric transmission and transformation equipment-augmented electric network of claim 9, wherein the preventive control cost calculation module comprises:
and the fourth calculation module is used for establishing a preventive control decision optimization model taking the minimum total cost of preventive control measures in the preventive control measure set C as an optimization target and taking the active power of each safety and stability monitoring channel in the adjustable space, the power grid power balance and the safety and stability monitoring channel set T of the preventive control measures in the preventive control measure set C not greater than the limit of the safety and stability monitoring channel set T before the capacity increase of the power transmission and transformation equipment as a constraint condition aiming at each scene in the preventive control scene set W respectively based on the power grid load flow calculation result of the scene, and obtaining the preventive control cost of the scene in the preventive control measure set C through optimization calculation.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099906A (en) * | 2016-05-13 | 2016-11-09 | 国电南瑞科技股份有限公司 | A kind of power system safety and stability online integrated campaign method |
| CN107122920A (en) * | 2017-05-19 | 2017-09-01 | 浙江大学 | A kind of transformer increase-volume scheme Economic Analysis Method |
| JP2017225205A (en) * | 2016-06-13 | 2017-12-21 | 古河電気工業株式会社 | Electric power network and laying method of electric power network |
-
2020
- 2020-06-10 CN CN202010523309.4A patent/CN111817305B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099906A (en) * | 2016-05-13 | 2016-11-09 | 国电南瑞科技股份有限公司 | A kind of power system safety and stability online integrated campaign method |
| JP2017225205A (en) * | 2016-06-13 | 2017-12-21 | 古河電気工業株式会社 | Electric power network and laying method of electric power network |
| CN107122920A (en) * | 2017-05-19 | 2017-09-01 | 浙江大学 | A kind of transformer increase-volume scheme Economic Analysis Method |
Non-Patent Citations (2)
| Title |
|---|
| Development and Application of On-Line Dynamic Security Early Warning and Preventive Control System in China;Wenchuan Wu,et al;《IEEE PES General Meeting》;20100930;第1-7页 * |
| 自然灾害下电网运行风险控制策略探讨;常康等;《电力系统保护与控制》;20190516;第47卷(第10期);第73-81页 * |
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