CN104881822A - Evaluation method, device and system - Google Patents
Evaluation method, device and system Download PDFInfo
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- CN104881822A CN104881822A CN201510370224.6A CN201510370224A CN104881822A CN 104881822 A CN104881822 A CN 104881822A CN 201510370224 A CN201510370224 A CN 201510370224A CN 104881822 A CN104881822 A CN 104881822A
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Abstract
The invention discloses an evaluation method, device and system. The method comprises the steps that first model parameters of a first power network wiring model of a first power grid in a target area are acquired, and the first power grid wiring model is used for describing structure attributes of the first power grid in a current running state; basic data used for evaluating the power grid load distribution conditions of the first power grid are determined according to the first model parameters of the first power grid model; quantitative evaluation is conducted on the power grid load distribution conditions of the first power grid according to the basic data; a quantitative evaluation result of the power grid load distribution conditions of the first power grid in the target area is output. By means of the evaluation method, device and system, the technical problem that due to the fact that the reasonable degree of the power grid load distribution conditions in a certain area is difficult to evaluate, a reference scheme for locating and sizing and circuit rerouting and transformation of a power grid transformer substation of the certain area can not be supplied is solved.
Description
Technical field
The present invention relates to computer realm, in particular to a kind of appraisal procedure, Apparatus and system.
Background technology
Under ideal conditions, the network load in a certain area should be evenly distributed in the reasonable radius of electricity supply of each transformer station, balances each other to make the power needed for the power of the circuit in this area and transformer transmission and power load.
But, owing to affecting by factors such as Urban House Demolition, population migration, line corridor occupation of land difficulties, at the planning initial stage, originally network load distributes relatively reasonable circuit, after development in a few years, easy appearance situation pockety, this result directly can cause local line overload or 10kV busbar voltage extremely.
In the related, owing to being difficult to the resonable degree assessing a certain area power grid power load distributing situation, cause to cut to change for the electricity grid substation addressing constant volume in a certain area and circuit providing reference data.
For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of appraisal procedure, Apparatus and system, at least to solve the resonable degree owing to being difficult to assess a certain area power grid power load distributing situation, cause to cut for the electricity grid substation addressing constant volume in a certain area and circuit the technical matters changing and reference scheme is provided.
According to an aspect of the embodiment of the present invention, provide a kind of appraisal procedure, comprise: the first model parameter obtaining the first power network wiring model of the first electrical network in target area, above-mentioned first power network wiring model is for describing the structure attribute of above-mentioned first electrical network in the current state of operation; The basic data of the network load distribution situation assessing above-mentioned first electrical network is determined according to the first model parameter of above-mentioned first electric network model; Quantitative evaluation is carried out according to the network load distribution situation of above-mentioned basic data to above-mentioned first electrical network; Export the quantitative evaluation result of the network load distribution situation of above-mentioned first electrical network in above-mentioned target area.
Further, after the quantitative evaluation result of network load distribution situation exporting above-mentioned first electrical network in above-mentioned target area, said method also comprises: the second model parameter obtaining the second power network wiring model of the second electrical network in target area, and above-mentioned second power network wiring model is for describing the structure attribute of above-mentioned second electrical network in the current state of operation; The basic data of the network load distribution situation assessing above-mentioned second electrical network is determined according to the second model parameter of above-mentioned second electric network model; The network load distribution situation of basic data to the network load distribution situation of above-mentioned second electrical network and above-mentioned first electrical network according to the basic data of the network load distribution situation of above-mentioned second electrical network and the network load distribution situation of above-mentioned first electrical network compares, and obtains comparative result; From above-mentioned first electrical network and above-mentioned second electrical network, the electrical network that network load is evenly distributed is determined according to above-mentioned comparative result; The electrical network be evenly distributed by network load exports as quantitative evaluation result.
Further, above-mentioned target area comprises multiple subregion, a partition power grid in corresponding above-mentioned first electrical network of each subregion, the basic data determining the network load distribution situation assessing above-mentioned first electrical network according to the first model parameter of above-mentioned first electric network model comprises: the basic data determining the partition power grid power load distributing situation of the partition power grid that in above-mentioned multiple subregion, each subregion is corresponding according to the first model parameter of above-mentioned first electric network model, carry out quantitative evaluation according to the network load distribution situation of above-mentioned basic data to above-mentioned first electrical network to comprise: the electric uniformity ratio of partition power grid load calculating each subregion above-mentioned according to the basic data of the partition power grid power load distributing situation of partition power grid corresponding to each subregion above-mentioned, the electric uniformity ratio of the first network load of above-mentioned target area is calculated according to the electric uniformity ratio of partition power grid load of each subregion above-mentioned, quantitative evaluation is carried out according to the network load distribution situation of the electric uniformity ratio of above-mentioned first network load to above-mentioned first electrical network.
Further, by the electric uniformity ratio of partition power grid load of following formulae discovery each subregion above-mentioned: S
i-y=S
i-max-S
i-o, S
i-max=S
i-o+ mS
i-d,
wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
Further, by the electric uniformity ratio of the first network load of the above-mentioned target area of following formulae discovery:
wherein, T is the electric uniformity ratio of the first network load of above-mentioned target area, a
iit is the weighting coefficient of the i-th subregion.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of apparatus for evaluating, comprise: the first acquiring unit, for obtaining the first model parameter of the first power network wiring model of the first electrical network in target area, above-mentioned first power network wiring model is for describing the structure attribute of above-mentioned first electrical network in the current state of operation; First determining unit, for determining the basic data of the network load distribution situation assessing above-mentioned first electrical network according to the first model parameter of above-mentioned first electric network model; Assessment unit, for carrying out quantitative evaluation according to the network load distribution situation of above-mentioned basic data to above-mentioned first electrical network; Output unit, for exporting the quantitative evaluation result of the network load distribution situation of above-mentioned first electrical network in above-mentioned target area.
Further, said apparatus also comprises: second acquisition unit, for after the quantitative evaluation result of network load distribution situation exporting above-mentioned first electrical network in above-mentioned target area, obtain the second model parameter of the second power network wiring model of the second electrical network in target area, above-mentioned second power network wiring model is for describing the structure attribute of above-mentioned second electrical network in the current state of operation; Second determining unit, for determining the basic data of the network load distribution situation assessing above-mentioned second electrical network according to the second model parameter of above-mentioned second electric network model; Comparing unit, the network load distribution situation of basic data to the network load distribution situation of above-mentioned second electrical network and above-mentioned first electrical network for the basic data of the network load distribution situation according to above-mentioned second electrical network and the network load distribution situation of above-mentioned first electrical network compares, and obtains comparative result; 3rd determining unit, for determining the electrical network that network load is evenly distributed according to above-mentioned comparative result from above-mentioned first electrical network and above-mentioned second electrical network; The electrical network of above-mentioned output unit also for being evenly distributed by network load exports as quantitative evaluation result.
Further, above-mentioned target area comprises multiple subregion, a partition power grid in corresponding above-mentioned first electrical network of each subregion, above-mentioned first determining unit is also for determining the basic data of the partition power grid power load distributing situation of the partition power grid that in above-mentioned multiple subregion, each subregion is corresponding according to the first model parameter of above-mentioned first electric network model, above-mentioned assessment unit comprises: the first computing module, basic data for the partition power grid power load distributing situation according to partition power grid corresponding to each subregion above-mentioned calculates the electric uniformity ratio of partition power grid load of each subregion above-mentioned, second computing module, for calculating the electric uniformity ratio of the first network load of above-mentioned target area according to the electric uniformity ratio of partition power grid load of each subregion above-mentioned, evaluation module, for carrying out quantitative evaluation according to the network load distribution situation of the electric uniformity ratio of above-mentioned first network load to above-mentioned first electrical network.
Further, above-mentioned first computing module is also for the electric uniformity ratio of partition power grid load by following formulae discovery each subregion above-mentioned: S
i-y=S
i-max-S
i-o, S
i-max=S
i-o+ mS
i-d,
wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
Further, above-mentioned second computing module is also for the electric uniformity ratio of the first network load by the above-mentioned target area of following formulae discovery:
wherein, T is the electric uniformity ratio of the first network load of above-mentioned target area, a
iit is the weighting coefficient of the i-th subregion.
According to the one side again of the embodiment of the present invention, additionally provide a kind of evaluating system, comprising: the apparatus for evaluating of above-mentioned any one
In embodiments of the present invention, adopt the mode that software and hardware combines, by obtaining the first model parameter of the first power network wiring model of the first electrical network in target area, the first power network wiring model is for describing the structure attribute of the first electrical network in the current state of operation; The basic data of the network load distribution situation of assessment first electrical network is determined according to the first model parameter of the first electric network model; Quantitative evaluation is carried out according to the network load distribution situation of basic data to the first electrical network; Export the quantitative evaluation result of the network load distribution situation of the first electrical network in target area, reach the object of the resonable degree of a certain area power grid power load distributing situation of simple assessment, thus achieve and the electricity grid substation addressing constant volume in a certain area and circuit can cut the technique effect changing and reference scheme is provided, and then the resonable degree solved owing to being difficult to assess a certain area power grid power load distributing situation, cause to cut for the electricity grid substation addressing constant volume in a certain area and circuit the technical matters changing and reference scheme is provided.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the hardware configuration of a kind of optional evaluating system according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the software architecture of a kind of optional evaluating system according to the embodiment of the present invention;
Fig. 3 is the schematic diagram of a kind of typical area power grid connection mode according to the embodiment of the present invention;
Fig. 4 is the calculating S according to the embodiment of the present invention
i-maxschematic diagram;
Fig. 5 is the process flow diagram of a kind of optional appraisal procedure according to the embodiment of the present invention; And
Fig. 6 is the schematic diagram of a kind of optional apparatus for evaluating according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiment 1
According to the embodiment of the present invention, provide a kind of device embodiment of evaluating system.
This evaluating system comprises apparatus for evaluating.This apparatus for evaluating comprises: the first acquiring unit, and for obtaining the first model parameter of the first power network wiring model of the first electrical network in target area, the first power network wiring model is for describing the structure attribute of the first electrical network in the current state of operation; First determining unit, for determining the basic data of the network load distribution situation of assessment first electrical network according to the first model parameter of the first electric network model; Assessment unit, for carrying out quantitative evaluation according to the network load distribution situation of basic data to the first electrical network; Output unit, for exporting the quantitative evaluation result of the network load distribution situation of the first electrical network in target area.
As shown in Figure 1, the hardware configuration of evaluating system comprises: the energy management system EMS102 being positioned at production control district, be positioned at the uni-directional physical xegregating unit 104 of place of safety, EMS Web server 106, fire wall 108, be positioned at the interface server 110 of Office Area, relational database server 112, live database server 114 and application server 116.Wherein, energy management system EMS102 is responsible for the related data of the electrical network gathered in production control district; Uni-directional physical xegregating unit 104 is responsible for ensureing network data security, and control data stream from inflow place of safety, production control district, and can only oppositely cannot flow into production control district from place of safety; EMS Web server 106 is for the data of collecting energy management system EMS102; During use, interface server 110 is responsible for receiving the parameters such as CIM/XML file (i.e. the model parameter of power network wiring model), SCADA real time data from EMS Web server 106, and is stored in respectively after the data received suitably being processed in relational database server 112 and live database server 114; Particularly, relational database server 112, for storing the model parameter of electrical network connection mode, comprising: the parameters such as electric network model, device parameter, equipment state; Live database server 114 is for storing the real time data gathered from EMS; Application server 116 is for being responsible for the services such as the calculating of online topological analysis, tidal current analysis, the electric uniformity ratio of partition power grid load of each subregion and the electric uniformity ratio of network load of whole target area, and the Web completing result of calculation issues.
It should be noted that, in embodiments of the present invention, whether correct in order to verify the model parameter of the power network wiring model in relational database server 112, in the hardware configuration of evaluating system, be provided with live database server 114.When the real time data of storage in live database server 114 and the model parameter of current power network wiring model match, determine that the model parameter of the power network wiring model in relational database server 112 is correct; Otherwise, determine the model parameter mistake of the power network wiring model in relational database server 112.
Corresponding with the hardware configuration shown in Fig. 1, as shown in Figure 2, the software architecture of above-mentioned evaluating system comprises: data Layer, basal layer, application layer and presentation layer 4 major parts.Each level concrete function as shown in Figure 2, data Layer is used for the model parameter obtaining power network wiring model from CIM/XML file, and from SCADA Real time data acquisition real time data, and then by the tidal data recovering of acquisition in data integration bus, also be, data Layer primary responsibility carries out data acquisition, standard handovers to the data of separate sources according to standard interface, wherein can obtain operation of power networks real time data from EMS; Basal layer is used for providing topological analysis service according to the model parameter of power network wiring model, and provide calculation services according to real time data, also be, basal layer comprises topological analysis service and calculation services 2 parts, topological analysis service is mainly used to carry out network structure description to the electrical network under current operating conditions, calculation services provides necessary fundamental analysis data for application layer, mainly comprises branch road through-put power and node voltage.First it adopt P-Q decomposition method to carry out primary iteration, and then proceed to the inferior method of Niu Dun – pressgang; Application layer is the core of system, and for carrying out the quantitative evaluation of network load distribution situation according to topological analysis result and result of calculation to target area, its core algorithm will be described in detail in embodiment of the method part, not repeat them here; Presentation layer is for exporting assessment result, and also, presentation layer is responsible for the result of calculation of application layer to be presented to user with the form of figure and text, such as, adopts Flex technology to realize the issue of real time data on Web and graphic software platform.
In embodiments of the present invention, by building a set of application on site system comprising hardware and software, the quantitative evaluation of network load distribution situation is realized.Particularly, this system is by EMS acquisition area power grid Connection Mode and with 50% numerical value of all transformer 10kV winding sides capacity in a certain subregion of area power grid, as the original state of Load flow calculation, calculated the available power supply capacity of each subregion by flow calculation program and appraisal procedure of the present invention, then adopt appraisal procedure proposed by the invention to try to achieve the electric uniformity ratio of partition power grid load of each subregion; Finally the electric uniformity ratio of partition power grid load of all subregions is weighted, tries to achieve the electric uniformity ratio of network load of target area, export result of calculation finally by Web, and judge the network load distribution resonable degree of this target area with this.It should be noted that, algorithm part will be described in detail in embodiment of the method part of the present invention, not repeat them here.
In addition, the quantitative evaluation scheme of the network load distribution situation to certain area that the embodiment of the present invention proposes, simple and clear, be easy to realize.And the basic data needed for the program is easy to obtain.
The evaluation scheme provided in the embodiment of the present invention is provided, whether the network load bay status not only can assessing some areas is reasonable, determine the weak link of the electrical network of this area, and can compare areal electrical network different modification schemes in network load distribution situation, determine optimum electric network reconstruction scheme, for choosing of electric network reconstruction scheme provides foundation.
Particularly, during network load distribution situation in the different modification scheme of the electrical network for comparing areal, said apparatus can also comprise: second acquisition unit, for after the quantitative evaluation result of network load distribution situation exporting the first electrical network in target area, obtain the second model parameter of the second power network wiring model of the second electrical network in target area, the second power network wiring model is for describing the structure attribute of the second electrical network in the current state of operation; Second determining unit, for determining the basic data of the network load distribution situation of assessment second electrical network according to the second model parameter of the second electric network model; Comparing unit, basic data for the basic data of the network load distribution situation according to the second electrical network and the network load distribution situation of the first electrical network compares the network load distribution situation of the second electrical network and the network load distribution situation of the first electrical network, obtains comparative result; 3rd determining unit, for determining the electrical network that network load is evenly distributed according to comparative result from the first electrical network and the second electrical network; The electrical network of output unit also for being evenly distributed by network load exports as quantitative evaluation result.
Alternatively, above-mentioned target area can comprise multiple subregion, a partition power grid in corresponding first electrical network of each subregion, the first determining unit is also for determining the basic data of the partition power grid power load distributing situation of the partition power grid that in multiple subregion, each subregion is corresponding according to the first model parameter of the first electric network model.Accordingly, assessment unit comprises: the first computing module, and the basic data for the partition power grid power load distributing situation according to partition power grid corresponding to each subregion calculates the electric uniformity ratio of partition power grid load of each subregion; Second computing module, for calculating the electric uniformity ratio of the first network load of target area according to the electric uniformity ratio of partition power grid load of each subregion; Evaluation module, for carrying out quantitative evaluation according to the network load distribution situation of the electric uniformity ratio of the first network load to the first electrical network.
Pass through the embodiment of the present invention, not only can the partial electric grid power load distributing situation of each subregion in quantitative evaluation areal, but also can the overall network load distribution situation of all subregions in quantitative evaluation this area, thus reach the technique effect of the resonable degree of the overall network load distribution situation in a certain area of effective quantitative evaluation, in conjunction with area power grid typical wiring situation, with clear, be easy to be operating as principle, area power grid power load distributing situation quantitative evaluation scheme is proposed.
Alternatively, the first computing module is also for the electric uniformity ratio of partition power grid load by following each subregion of formulae discovery: S
i-y=S
i-max-S
i-o(1), S
i-max=S
i-o+ mS
i-d(2),
wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
Adopt formula (1), (2), (3) to calculate the method for the electric uniformity ratio of load of each partition power grid simply by the embodiment of the present invention, algorithm the convergence speed is fast.
Alternatively, the second computing module is also for the electric uniformity ratio of the first network load by following formulae discovery target area:
wherein, T is the electric uniformity ratio of the first network load of target area, a
iit is the weighting coefficient of the i-th subregion.
The present invention is elaborated below by way of specific embodiment:
The power network wiring model of electrical network in regional A as shown in Figure 3, as seen from Figure 3, the electrical network in this area is type area's power transmission network of the multi-voltage grade comprising 220kV, 110kV and 10kV, three transmissions of electricity subregion (not comprising 220kV transformer station) can be comprised, the T wiring wherein not participating in running does not belong to any subregion, and detailed subregion is in table 1.Be connected by 220kV interconnection between 220kV transformer station, form loop-net operation with other 220kV transformer stations of this area; Though 110kV transformer substation side has interconnection to be connected, in order to avoid the interference of electromagnetic looped network, when normally running, the 110kV transformer station independent operating separately of this area.During enforcement, EMS can be utilized to obtain the power network wiring pattern of this area, and in this area's electrical network in each partition power grid all 10kV Transformer Winding sides capacity 50%.
Table 1
(1) mathematical model of the available power supply capacity of each subregion is calculated
Wherein, the available power supply capacity of each subregion refers to that each partition power grid is under the appointment method of operation, when meeting the condition of the constraint of all bus nodes voltage and the constraint of all branch powers, the difference of the peak power that this partition power grid can provide and current supplied load, its mathematic(al) representation is:
S
y＝S
max-S
o(5)
S
max＝S
o+mS
d(6)
In formula, S
yfor under Exist Network Structure and load level, the difference of the peak power that partition power grid can provide and current supplied load, namely partition power grid can use power supply capacity; S
maxfor the peak power that partition power grid can provide; The embodiment of the present invention gets S
ofor 50% of all 10kV Transformer Winding sides capacity in subregion; M is a real number, at S
d=S
oprerequisite under represent load growth multiple; S
dfor load growth step-length, the present invention gets S
d=S
o.
Constraint condition comprises trend constraint, node voltage retrains and the capacity-constrained of wire and transformer branch, namely
YU＝I (7)
V
il≤V
i≤V
iu(8)
i
i≤i
imax(9)
S
i≤S
imax(10)
In formula, Y is bus admittance matrix, and U is node voltage vector, and I is the multiple pulse current injectingt vector of all nodes; V
i, V
iuand V
ilbe respectively voltage and the bound thereof of node i; i
iand i
imaxthe maximum current that the electric current flow through for each branch road and its permission are passed through; S
iand S
imaxthe performance number flowed out for each transformer branch and maximum permission capacity.
In embodiments of the present invention, utilize network load to distribute and Load flow calculation constraint condition inner link between the two, take out the quantitative evaluation index of convenient operation, that has accomplished physical concept and mathematical model effectively has unification, has certain actual application value.
(2) S is asked for
maxmethod
From current load level operating point, choose a suitable step-length m, according to certain load growth pattern, constantly increase load, often increase a load and just ask for a trend solution, until there is out-of-limit constraint condition to be excited.In load growth process, step-length m strategically constantly adjusts, until meet certain accuracy requirement.Be about to the peak power that the out-of-limit load corresponding to that critical point of generation can provide under the current method of operation as this regional power grid.
In embodiments of the present invention, adopt the method for automatic changing step progressively to increase payload forward, even increase load success (namely not having constraint condition to trigger), then continue to increase load with former step-length; If increase load failure (triggering constraint condition), then step-length reduces by half, so repeatedly, until step-length is reduced to meet accuracy requirement, its principle as shown in Figure 4, the power that figure mean camber line and coordinate axis institute enclosure are divided into partition power grid normally to carry illustrates that district, current load level are S
0, with former load for growth base constantly increases load, until trigger out-of-limit condition, then reduce step-length, be finally converged in frontier point S
6.
(3) the electric uniformity ratio of partition power grid load is calculated
Ask for the peak power S that the i-th subregion can provide
i-maxafterwards, the available power supply capacity S of the i-th subregion just can be calculated according to formula (1)
i-y, the present invention defines the electric uniformity ratio A of load of the i-th subregion
ifor:
Wherein, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, the embodiment of the present invention gets S
i-totalbe all transformer capacity sums in all 220kV transformer stations in the i-th subregion.
(4) the electric uniformity ratio of area power grid load is calculated
The electric uniformity ratio T of embodiment of the present invention definition area power grid load is:
Wherein, T is the electric uniformity ratio of area power grid load, and between 0 and 50%; a
ibe the weighting coefficient of the i-th subregion, the embodiment of the present invention is got
s
totalfor area power grid designs power supply capacity, the embodiment of the present invention gets S
totalfor all transformer capacity sums of 220kV transformer stations all in area power grid.
(5) decision condition
S
i-yrepresent the available power supply capacity of the i-th subregion under current loads level, its value is larger, and to represent the load that electrical network can provide more; If A
ithe ratio that the larger available power supply capacity under current loads level of value accounts for partition power grid design power supply capacity is larger, illustrates that the power load distributing of partition power grid is more reasonable; In like manner, if T is larger, then illustrate that the power load distributing of whole distract electrical network is more reasonable.
By the embodiment of the present invention, being reach simple and clear carrying out assessment to the network load distribution situation in a certain region, being easy to the technique effect realized.Say from technological layer, basic data needed for the embodiment of the present invention is all easy to obtain, and data acquisition difficulty is lower; Embodiment of the present invention computing method are simple, and algorithm the convergence speed is fast; Embodiment of the present invention result of calculation clear physical concept, is easily understood.
Embodiment 2
According to the embodiment of the present invention, provide a kind of embodiment of the method for appraisal procedure, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 5 is the process flow diagram of a kind of optional appraisal procedure according to the embodiment of the present invention, and as shown in Figure 5, the method comprises the steps:
Step S502, obtain the first model parameter of the first power network wiring model of the first electrical network in target area, the first power network wiring model is for describing the structure attribute of the first electrical network in the current state of operation;
Step S504, determines the basic data of the network load distribution situation of assessment first electrical network according to the first model parameter of the first electric network model;
Step S506, carries out quantitative evaluation according to the network load distribution situation of basic data to the first electrical network;
Step S508, exports the quantitative evaluation result of the network load distribution situation of the first electrical network in target area.
In embodiments of the present invention, by building a set of application on site system comprising hardware and software, the quantitative evaluation of network load distribution situation is realized.Particularly, this system is by EMS acquisition area power grid Connection Mode and with 50% numerical value of all transformer 10kV winding sides capacity in a certain subregion of area power grid, as the original state of Load flow calculation, calculated the available power supply capacity of each subregion by flow calculation program and appraisal procedure of the present invention, then adopt appraisal procedure proposed by the invention to try to achieve the electric uniformity ratio of partition power grid load of each subregion; Finally the electric uniformity ratio of partition power grid load of all subregions is weighted, tries to achieve the electric uniformity ratio of network load of target area, export result of calculation finally by Web, and judge the network load distribution resonable degree of this target area with this.It should be noted that, algorithm part will be described in detail in embodiment of the method part of the present invention, not repeat them here.
In addition, the quantitative evaluation scheme of the network load distribution situation to certain area that the embodiment of the present invention proposes, simple and clear, be easy to realize.And the basic data needed for the program is easy to obtain.
The evaluation scheme provided in the embodiment of the present invention is provided, whether the network load bay status not only can assessing some areas is reasonable, determine the weak link of the electrical network of this area, and can compare areal electrical network different modification schemes in network load distribution situation, determine optimum electric network reconstruction scheme, for choosing of electric network reconstruction scheme provides foundation.
Particularly, during network load distribution situation in the different modification scheme of the electrical network for comparing areal, after the quantitative evaluation result of network load distribution situation exporting the first electrical network in target area, said method can also comprise:
S2, obtain the second model parameter of the second power network wiring model of the second electrical network in target area, the second power network wiring model is for describing the structure attribute of the second electrical network in the current state of operation;
S4, determines the basic data of the network load distribution situation of assessment second electrical network according to the second model parameter of the second electric network model;
S6, basic data according to the basic data of the network load distribution situation of the second electrical network and the network load distribution situation of the first electrical network compares the network load distribution situation of the second electrical network and the network load distribution situation of the first electrical network, obtains comparative result;
S8, determines the electrical network that network load is evenly distributed according to comparative result from the first electrical network and the second electrical network;
S10, the electrical network be evenly distributed by network load exports as quantitative evaluation result.
Pass through the embodiment of the present invention, not only can the partial electric grid power load distributing situation of each subregion in quantitative evaluation areal, but also can the overall network load distribution situation of all subregions in quantitative evaluation this area, thus reach the technique effect of the resonable degree of the overall network load distribution situation in a certain area of effective quantitative evaluation, in conjunction with area power grid typical wiring situation, with clear, be easy to be operating as principle, area power grid power load distributing situation quantitative evaluation scheme is proposed.
Alternatively, target area comprises multiple subregion, a partition power grid in corresponding first electrical network of each subregion, the basic data determining the network load distribution situation of assessment first electrical network according to the first model parameter of the first electric network model comprises: the basic data determining the partition power grid power load distributing situation of the partition power grid that in multiple subregion, each subregion is corresponding according to the first model parameter of the first electric network model, carry out quantitative evaluation according to the network load distribution situation of basic data to the first electrical network to comprise: the electric uniformity ratio of partition power grid load calculating each subregion according to the basic data of the partition power grid power load distributing situation of partition power grid corresponding to each subregion, the electric uniformity ratio of the first network load of target area is calculated according to the electric uniformity ratio of partition power grid load of each subregion, quantitative evaluation is carried out according to the network load distribution situation of the electric uniformity ratio of the first network load to the first electrical network.
Alternatively, by the electric uniformity ratio of partition power grid load of following each subregion of formulae discovery:
S
i-y＝S
i-max-S
i-o， (1)
S
i-max＝S
i-o+mS
i-d， (2)
Wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
Adopt formula (1), (2), (3) to calculate the method for the electric uniformity ratio of load of each partition power grid simply by the embodiment of the present invention, algorithm the convergence speed is fast.
Alternatively, by the electric uniformity ratio of the first network load of following formulae discovery target area:
Wherein, T is the electric uniformity ratio of the first network load of target area, a
iit is the weighting coefficient of the i-th subregion.
By the embodiment of the present invention, being reach simple and clear carrying out assessment to the network load distribution situation in a certain region, being easy to the technique effect realized.Say from technological layer, basic data needed for the embodiment of the present invention is all easy to obtain, and data acquisition difficulty is lower; Embodiment of the present invention computing method are simple, and algorithm the convergence speed is fast; Embodiment of the present invention result of calculation clear physical concept, is easily understood.
Embodiment 3
According to the embodiment of the present invention, provide a kind of device embodiment of apparatus for evaluating.
Fig. 6 is the schematic diagram of a kind of optional apparatus for evaluating according to the embodiment of the present invention, and as shown in Figure 6, this evaluating system comprises apparatus for evaluating.This apparatus for evaluating comprises: the first acquiring unit 602, and for obtaining the first model parameter of the first power network wiring model of the first electrical network in target area, the first power network wiring model is for describing the structure attribute of the first electrical network in the current state of operation; First determining unit 604, for determining the basic data of the network load distribution situation of assessment first electrical network according to the first model parameter of the first electric network model; Assessment unit 606, for carrying out quantitative evaluation according to the network load distribution situation of basic data to the first electrical network; Output unit 608, for exporting the quantitative evaluation result of the network load distribution situation of the first electrical network in target area.
The evaluation scheme provided in the embodiment of the present invention is provided, whether the network load bay status not only can assessing some areas is reasonable, determine the weak link of the electrical network of this area, and can compare areal electrical network different modification schemes in network load distribution situation, determine optimum electric network reconstruction scheme, for choosing of electric network reconstruction scheme provides foundation.
Particularly, during network load distribution situation in the different modification scheme of the electrical network for comparing areal, said apparatus can also comprise: second acquisition unit, for after the quantitative evaluation result of network load distribution situation exporting the first electrical network in target area, obtain the second model parameter of the second power network wiring model of the second electrical network in target area, the second power network wiring model is for describing the structure attribute of the second electrical network in the current state of operation; Second determining unit, for determining the basic data of the network load distribution situation of assessment second electrical network according to the second model parameter of the second electric network model; Comparing unit, basic data for the basic data of the network load distribution situation according to the second electrical network and the network load distribution situation of the first electrical network compares the network load distribution situation of the second electrical network and the network load distribution situation of the first electrical network, obtains comparative result; 3rd determining unit, for determining the electrical network that network load is evenly distributed according to comparative result from the first electrical network and the second electrical network; The electrical network of output unit also for being evenly distributed by network load exports as quantitative evaluation result.
Alternatively, above-mentioned target area can comprise multiple subregion, a partition power grid in corresponding first electrical network of each subregion, the first determining unit is also for determining the basic data of the partition power grid power load distributing situation of the partition power grid that in multiple subregion, each subregion is corresponding according to the first model parameter of the first electric network model.Accordingly, assessment unit comprises: the first computing module, and the basic data for the partition power grid power load distributing situation according to partition power grid corresponding to each subregion calculates the electric uniformity ratio of partition power grid load of each subregion; Second computing module, for calculating the electric uniformity ratio of the first network load of target area according to the electric uniformity ratio of partition power grid load of each subregion; Evaluation module, for carrying out quantitative evaluation according to the network load distribution situation of the electric uniformity ratio of the first network load to the first electrical network.
Pass through the embodiment of the present invention, not only can the partial electric grid power load distributing situation of each subregion in quantitative evaluation areal, but also can the overall network load distribution situation of all subregions in quantitative evaluation this area, thus reach the technique effect of the resonable degree of the overall network load distribution situation in a certain area of effective quantitative evaluation, in conjunction with area power grid typical wiring situation, with clear, be easy to be operating as principle, area power grid power load distributing situation quantitative evaluation scheme is proposed.
Alternatively, the first computing module is also for the electric uniformity ratio of partition power grid load by following each subregion of formulae discovery: S
i-y=S
i-max-S
i-o, S
i-max=S
i-o+ mS
i-d,
wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
Alternatively, the second computing module is also for the electric uniformity ratio of the first network load by following formulae discovery target area:
wherein, T is the electric uniformity ratio of the first network load of target area, a
iit is the weighting coefficient of the i-th subregion.
It should be noted that, the device provided in device embodiment of the present invention may be used for the method provided in manner of execution embodiment, and the method provided in embodiment of the method may be used for the device that provides in generating apparatus embodiment, and equipment and system is suitable for mutually, therefore, the content of system, method, device section is similar, can reference mutually, the content overlapped in three embodiments, the present invention elaborates in an embodiment wherein, repeats no more in other embodiments.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. an appraisal procedure, is characterized in that, comprising:
Obtain the first model parameter of the first power network wiring model of the first electrical network in target area, described first power network wiring model is for describing the structure attribute of described first electrical network in the current state of operation;
The basic data of the network load distribution situation assessing described first electrical network is determined according to the first model parameter of described first electric network model;
Quantitative evaluation is carried out according to the network load distribution situation of described basic data to described first electrical network;
Export the quantitative evaluation result of the network load distribution situation of described first electrical network in described target area.
2. appraisal procedure according to claim 1, is characterized in that, after the quantitative evaluation result of network load distribution situation exporting described first electrical network in described target area, described method also comprises:
Obtain the second model parameter of the second power network wiring model of the second electrical network in target area, described second power network wiring model is for describing the structure attribute of described second electrical network in the current state of operation;
The basic data of the network load distribution situation assessing described second electrical network is determined according to the second model parameter of described second electric network model;
The network load distribution situation of basic data to the network load distribution situation of described second electrical network and described first electrical network according to the basic data of the network load distribution situation of described second electrical network and the network load distribution situation of described first electrical network compares, and obtains comparative result;
From described first electrical network and described second electrical network, the electrical network that network load is evenly distributed is determined according to described comparative result;
The electrical network be evenly distributed by network load exports as quantitative evaluation result.
3. appraisal procedure according to claim 1, is characterized in that, described target area comprises multiple subregion, a partition power grid in corresponding described first electrical network of each subregion,
The basic data determining the network load distribution situation assessing described first electrical network according to the first model parameter of described first electric network model comprises: the basic data determining the partition power grid power load distributing situation of the partition power grid that in described multiple subregion, each subregion is corresponding according to the first model parameter of described first electric network model
Carry out quantitative evaluation according to the network load distribution situation of described basic data to described first electrical network to comprise: the electric uniformity ratio of partition power grid load calculating each subregion described according to the basic data of the partition power grid power load distributing situation of partition power grid corresponding to each subregion described; The electric uniformity ratio of the first network load of described target area is calculated according to the electric uniformity ratio of partition power grid load of each subregion described; Quantitative evaluation is carried out according to the network load distribution situation of the electric uniformity ratio of described first network load to described first electrical network.
4. appraisal procedure according to claim 3, is characterized in that, the electric uniformity ratio of partition power grid load by each subregion described in following formulae discovery:
S
i-y＝S
i-max-S
i-o，
S
i-max＝S
i-o+mS
i-d，
Wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
5. appraisal procedure according to claim 4, is characterized in that, the electric uniformity ratio of the first network load by target area described in following formulae discovery:
Wherein, T is the electric uniformity ratio of the first network load of described target area, a
iit is the weighting coefficient of the i-th subregion.
6. an apparatus for evaluating, is characterized in that, comprising:
First acquiring unit, for obtaining the first model parameter of the first power network wiring model of the first electrical network in target area, described first power network wiring model is for describing the structure attribute of described first electrical network in the current state of operation;
First determining unit, for determining the basic data of the network load distribution situation assessing described first electrical network according to the first model parameter of described first electric network model;
Assessment unit, for carrying out quantitative evaluation according to the network load distribution situation of described basic data to described first electrical network;
Output unit, for exporting the quantitative evaluation result of the network load distribution situation of described first electrical network in described target area.
7. apparatus for evaluating according to claim 6, is characterized in that, described device also comprises:
Second acquisition unit, for after the quantitative evaluation result of network load distribution situation exporting described first electrical network in described target area, obtain the second model parameter of the second power network wiring model of the second electrical network in target area, described second power network wiring model is for describing the structure attribute of described second electrical network in the current state of operation;
Second determining unit, for determining the basic data of the network load distribution situation assessing described second electrical network according to the second model parameter of described second electric network model;
Comparing unit, the network load distribution situation of basic data to the network load distribution situation of described second electrical network and described first electrical network for the basic data of the network load distribution situation according to described second electrical network and the network load distribution situation of described first electrical network compares, and obtains comparative result;
3rd determining unit, for determining the electrical network that network load is evenly distributed according to described comparative result from described first electrical network and described second electrical network;
The electrical network of described output unit also for being evenly distributed by network load exports as quantitative evaluation result.
8. apparatus for evaluating according to claim 6, is characterized in that, described target area comprises multiple subregion, a partition power grid in corresponding described first electrical network of each subregion,
Described first determining unit also for determining the basic data of the partition power grid power load distributing situation of the partition power grid that in described multiple subregion, each subregion is corresponding according to the first model parameter of described first electric network model,
Described assessment unit comprises: the first computing module, and the basic data for the partition power grid power load distributing situation according to partition power grid corresponding to each subregion described calculates the electric uniformity ratio of partition power grid load of each subregion described; Second computing module, for calculating the electric uniformity ratio of the first network load of described target area according to the electric uniformity ratio of partition power grid load of each subregion described; Evaluation module, for carrying out quantitative evaluation according to the network load distribution situation of the electric uniformity ratio of described first network load to described first electrical network.
9. apparatus for evaluating according to claim 8, is characterized in that, described first computing module is also for the electric uniformity ratio of partition power grid load by each subregion described in following formulae discovery:
S
i-y＝S
i-max-S
i-o，
S
i-max＝S
i-o+mS
i-d，
Wherein, S
i-ybe the available power supply capacity of the i-th subregion, S
i-maxfor the peak power that the i-th subregion can provide, S
i-obe 50%, m of all 10kV Transformer Winding sides capacity in the i-th subregion be real number, S
dfor load growth step-length, S
i-totalbe the electrical reticulation design power supply capacity of the i-th subregion, A
ithe electric uniformity ratio of load of the i-th partition power grid.
10. apparatus for evaluating according to claim 9, is characterized in that, described second computing module is also for the electric uniformity ratio of the first network load by target area described in following formulae discovery:
Wherein, T is the electric uniformity ratio of the first network load of described target area, a
iit is the weighting coefficient of the i-th subregion.
11. 1 kinds of evaluating systems, is characterized in that, comprising: the apparatus for evaluating according to any one of claim 6 to 10.
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