CN103595042A - Method and device for determining constrained utilization maximal estimation of electric line and margin of constrained utilization maximal estimation - Google Patents
Method and device for determining constrained utilization maximal estimation of electric line and margin of constrained utilization maximal estimation Download PDFInfo
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- CN103595042A CN103595042A CN201310607221.0A CN201310607221A CN103595042A CN 103595042 A CN103595042 A CN 103595042A CN 201310607221 A CN201310607221 A CN 201310607221A CN 103595042 A CN103595042 A CN 103595042A
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Abstract
The invention discloses a method for determining the constrained utilization maximal estimation of an electric line. The method comprises the steps that the smallest section where the current electric line is located in a preset period is determined, wherein the smallest section comprises N transmission lines of the same voltage level; the transmission power quota of the smallest section is calculated; the transmission power quota is divided by N, a calculation result is used as the largest power transmission power quota of the current electric line; the largest power transmission power quota of the current electric line is divided by a benchmark transmission power in the first preset period, and a calculation result is determined as the constrained utilization maximal estimation of the current electric line. The invention further discloses a method and device for determining the constrained utilization average estimation of the electric line and the margins of the constrained utilization maximal estimation and the constrained utilization average estimation. By the adoption of the method and device for determining the constrained utilization maximal estimation and the constrained utilization average estimation of the electric line and the margins of the constrained utilization maximal estimation and the constrained utilization average estimation, the rationality and promotion potential of the utilization ratio level of the current electric line can be represented truly.
Description
Technical field
The application relates to technical field of power systems, particularly a kind of maximum/average utilization upper limit of definite electric line and the method and apparatus of maximum/average margin thereof.
Background technology
The situation of utilizing of electric line can embody Electric Power Network Planning construction and operation level, at aspects such as ensureing electrical network normally moves, structure optimization, has important references meaning.Conventionally, in the art, that with line efficiency, weighs electric line utilizes level height.Electric line utilance is maintained to reasonable level and contribute to excavate circuit delivery potential, optimize allocation of resources, operation of power networks quality is provided.
In prior art, electric line utilance is by doing the transmitted power of circuit in period of supervision and benchmark transmission power than obtaining, wherein, electric line transmitted power conventionally only relies on electric line actual operating data and obtains, and benchmark transmission power adopts economic transmission power, natural power or thermally-stabilised power limit.But in actual moving process, the utilance of electric line is subject to the impact of many factors, prior art is not considered these factors, makes the electric line utilance getting can not truly reflect the level that current electric line rationally utilizes.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of maximum/average utilization upper limit of definite electric line and the method and apparatus of nargin thereof, to provide the electric line that more can reflect to utilize the rational standard of level.
The method of the peak use rate upper limit of definite electric line that the embodiment of the present application provides comprises:
Determine the minimum cross section at current electric line place in the first scheduled time slot, the total N bar transmission line that comprises current electric line of described minimum cross section, the electric line that described N bar transmission line is same electric pressure;
Calculate the transmission power limit of described minimum cross section;
Described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
Described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot are made to phase division operation, the result of computing is defined as to the peak use rate upper limit of current electric line.
The method of the average utilization upper limit of definite electric line that the embodiment of the present application provides comprises:
According to aforesaid method, determine the peak use rate upper limit of current electric line;
Maximum delivery power and the average transmission power of determining current electric line in the second scheduled time slot, when aforesaid the first scheduled time slot does not occur, described the second scheduled time slot is before the first scheduled time slot; When aforesaid the first scheduled time slot has occurred, described the second scheduled time slot is the first scheduled time slot;
The average transmission power of current transmission and distribution line and maximum delivery power are made to phase division operation, and the result of phase division operation is designated as the first adjustment factor;
According to the described first adjustment factor, adjust the peak use rate upper limit of described current electric line, obtain the average utilization upper limit of current electric line.
Preferably, described method also comprises:
Add up uptime T1, unplanned idle time T2 and the planned outage time T 3 of current electric line in the second scheduled time slot;
T1 is made to phase division operation with T1, T2, T3 three's sum, and the result of phase division operation is designated as the second adjustment factor;
According to described second, adjust the average utilization upper limit that the factor is adjusted described current electric line.
Further preferably, describedly according to described second, adjust the factor and adjust the average utilization upper limit of described current electric line and be specially:
CUME
avg=CUME
peak×λ
1×λ
2
Wherein: described CUME
peakfor the peak use rate upper limit of the current electric line that obtains according to claim 1, described λ
1be the first adjustment factor, described λ
2be the second adjustment factor, described CUME
avgthe average utilization upper limit for the current electric line after the second adjustment factor is adjusted.
The method of the peak use rate nargin of definite electric line that the embodiment of the present application provides, is characterized in that, described method comprises:
Determine the actual maximum delivery power of current electric line in the first scheduled time slot;
Described actual maximum delivery power is made to phase division operation with benchmark transmission power, obtain the actual peak use rate of current electric line;
The actual peak use rate of the peak use rate upper limit of the current electric line obtaining according to aforesaid method and current electric line is made to difference operation, will make the peak use rate nargin of the result of difference operation as current electric line.
The method of the average utilization nargin of definite electric line that the embodiment of the present application provides comprises:
Determine the actual average transmission power of current electric line in the first scheduled time slot;
Described actual average transmission power and benchmark transmission power are made to phase division operation, obtain the actual average utilance of current electric line;
The actual average utilance of the average utilization upper limit of the current electric line obtaining according to aforesaid method and current electric line is made to difference operation, will make the average utilization nargin of the result of difference operation as current electric line.
The device of the peak use rate upper limit of definite electric line that the embodiment of the present application provides comprises: section determination unit, the first arithmetic element, the second arithmetic element and the 3rd arithmetic element, wherein:
Described section determination unit, for determining the minimum cross section of current electric line in the first scheduled time slot, the total N bar transmission line that comprises current electric line of described minimum cross section, the electric line that described N bar transmission line is same electric pressure;
Described the first arithmetic element, for calculating the transmission power limit of described minimum cross section;
Described the second arithmetic element, for described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
Described the 3rd arithmetic element, makes phase division operation by described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot, the result of computing is defined as to the peak use rate upper limit of current electric line.
The device of the average utilization upper limit of definite electric line that the embodiment of the present application provides comprises peak use rate upper limit determining device, the first power determining unit, the 4th arithmetic element and the first adjustment unit, wherein:
Described peak use rate upper limit determining device, for determining the peak use rate upper limit of current electric line;
Described the first power determining unit, for determining maximum delivery power and the average transmission power of current electric line in the second scheduled time slot, when aforesaid the first scheduled time slot does not occur, described the second scheduled time slot is before the first scheduled time slot; When aforesaid the first scheduled time slot has occurred, described the second scheduled time slot is the first scheduled time slot;
Described the 4th arithmetic element, for the average transmission power of current transmission and distribution line and maximum delivery power are made to phase division operation, the result of phase division operation is designated as the first adjustment factor;
Described the first adjustment unit, for adjusting according to described first the peak use rate upper limit that the factor is adjusted described current electric line.
Preferably, this device also comprises time statistic unit, the 5th arithmetic element and the second adjustment unit, wherein:
Described time statistic unit, for adding up the uptime T1 of current electric line in the second scheduled time slot, unplanned idle time T2 and planned outage time T 3;
Described the 5th arithmetic element, for T1 is made to phase division operation with T1, T2, T3 three's sum, the result of phase division operation is designated as the second adjustment factor;
Described the second adjustment unit, for adjusting according to described second the average utilization upper limit that the factor is adjusted described current electric line.
The embodiment of the present application determines that the device of the peak use rate nargin of electric line comprises device, the second power determining unit, the 6th arithmetic element and the first nargin determining unit of the peak use rate upper limit of determining electric line, wherein:
Described the second power determining unit, for determining the actual maximum delivery power of current electric line in the first preset period of time;
Described the 6th arithmetic element, for described actual maximum delivery power is made to phase division operation with benchmark transmission power, obtains the actual peak use rate of current electric line;
Described the first nargin determining unit, for the definite peak use rate upper limit of electric line and the actual peak use rate of current electric line of the device of the peak use rate upper limit by aforesaid definite electric line made to difference operation, the peak use rate nargin of the result of difference operation as current electric line will be made.
The device of the average utilization nargin of definite electric line that the embodiment of the present application provides comprises device, the 3rd power determining unit, the 7th arithmetic element and the second nargin determining unit of the average utilization upper limit of determining electric line, wherein:
Described the 3rd power determining unit, for determining the actual average transmission power of current electric line in the first preset period of time;
Described the 7th arithmetic element, for described actual average transmission power and benchmark transmission power are made to phase division operation, obtains the actual average utilance of current electric line;
Described the second nargin determining unit, for the definite average utilization upper limit of electric line and the actual average utilance of current electric line of the device of the average utilization upper limit by aforesaid definite electric line made to difference operation, the average utilization nargin of the result of difference operation as current electric line will be made.
The method of the maximum and average utilance upper limit of above-mentioned definite electric line that the embodiment of the present application provides, taken into full account the factors such as electric power netting safe running constraint, load kurtosis and maintenance and fault, in definite electric line utilance, being limited in this way power transmission and distribution utilance provides interchange electric line utilance actual accessible upper limit estimated value.The maximum and average utilance nargin of determining on this basis provides a kind of mode that contrasts practical efficiency and the utilance upper limit, contribute to assess the Improvement of line efficiency, and then provide quantitative analysis and decision support means for transmission line enlarging reconstruction.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is an embodiment flow chart of the method for the peak use rate upper limit of definite electric line;
Fig. 2 is an embodiment flow chart of the method for the average utilization upper limit of definite electric line;
Fig. 3 is the embodiment flow chart of the method for the peak use rate nargin of definite electric line;
Fig. 4 is the example structure block diagram of the device of the peak use rate upper limit of definite electric line;
Fig. 5 is the example structure block diagram of the device of the average utilization of definite electric line;
Fig. 6 is the example structure block diagram of the device of the peak use rate nargin of definite electric line.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all should belong to the scope of the application's protection.
Referring to Fig. 1, the figure shows the flow chart of an embodiment of the peak use rate upper limit of definite electric line of the application.This flow process comprises:
Step S101: determine the minimum cross section at current electric line place in the first scheduled time slot, the total N bar transmission line that comprises current electric line of described minimum cross section, the electric line that described N bar transmission line is same electric pressure;
Section is the section that the electric line by same electric pressure forms, minimum cross section conventionally by dispatcher when the given running limit determine, specifically can adopt power system safety and stability to calculate standard determines, in a section, can comprise many electric lines, these electric lines comprise current electric line, and " current electric line " refers to currently need to carry out the definite electric line of electric line utilance.First scheduled time slot is here a period of supervision determining the electric line utilance upper limit, its concrete time length can be set as required, typically, this period of supervision is the current period, it is different from follow-up by the second scheduled time slot of mentioning, when when still nonevent the first scheduled time slot (the first scheduled time slot does not occur) is predicted, before described the second scheduled time slot is selected in the first scheduled time slot; When the first scheduled time slot having occurred is added up, described the second scheduled time slot is consistent with the first scheduled time slot, and the first scheduled time slot and the second scheduled time slot are the identical period.
Step S102: the transmission power limit of calculating described minimum cross section;
After determining minimum cross section, can utilize the transmission power limit P of the method calculating minimum cross section of safety and stability calculating
boundary-peak, this limit P
boundary-peakafter calculating, by dispatcher, accordingly minimum cross section is set.Safety and stability calculate comprise that static security analysis, short circuit current Security Checking, steady stability are calculated, transient stability calculates, dynamic stability calculates that (large disturbance, microvariations), voltage stabilization calculate, frequency stabilization is calculated and synchronous calculate etc. again.
Step S103: described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
The transmission power limit P that comprises number of lines N and minimum cross section by the definite minimum cross section of abovementioned steps
boundary-peak, can calculate the maximum delivery power P of the actual permission of electric line
lim-peak, computing formula is as follows:
Step S104: described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot are made to phase division operation, the result of computing is defined as to the peak use rate upper limit of current electric line.
For convenient, use CUME here
peakrepresent that (CUME is the abbreviation of Constrained Utilization Maximal Estimation to the electric line peak use rate upper limit, refer to and considering under the related factors of operation of power networks, exchange the actual accessible upper limit estimated value of electric line peak use rate, referred to as the electric line peak use rate upper limit), benchmark transmission power P
maxrepresent this benchmark transmission power P
maxcan adopt any in economic transmission power, natural power or thermally-stabilised power limit, the application preferably adopts economic transmission power.By abovementioned steps, obtain maximum delivery power P
lim-peakafter, can calculate electric line peak use rate upper limit CUME according to following formula
peak:
The method of above-mentioned definite electric line peak use rate upper limit that the present embodiment provides, taken into full account electric power netting safe running and retrained this factor, this factor can reflect the impact on the transmission line peak use rate upper limit based on electric power netting safe running constraint requirements in electric line running.Compared with prior art, existing definite line efficiency is not such for another example on the one hand for the present embodiment, can only rely on electric line actual operating data calculates, and the actual conditions that taking into account system does not move, on the other hand, the present embodiment determines that the resonable degree that is limited to electric line utilance level on electric line peak use rate provides an important references value, can reflect reasonability and the Improvement of current electric line utilance level more truly.
In the aforementioned embodiment, in terms of existing technologies, considered electric power netting safe running constraint requirements, made the definite true and reliable of the electric line peak use rate upper limit.Yet, in actual electric network system running, the electric line utilance upper limit also may be subject to the impact of other factors, such as, the factors such as line load kurtosis, grid maintenance and fault recovery, these factors are considered in the deterministic process of the electric line utilance upper limit, will be conducive to further improve technique effect, consider that the electric line peak use rate upper limit after these influencing factors will be changed to the average utilization upper limit.Exemplarily line load kurtosis, grid maintenance and two factors of fault recovery are described below, those skilled in the art, on this basis, can also expand according to the application's invention marrow other execution mode.Obviously, these execution modes are all within the application's protection range.
In the time need to considering the factor of line load kurtosis, the application preferably carries out (referring to Fig. 2 in accordance with the following steps, the figure shows the flow process of determining the average utilization upper limit of electric line while simultaneously considering electric power netting safe running constraint and two factors of line load kurtosis, wherein step S201～204 are identical with previous embodiment, for avoiding repetition, directly from step S205, start explanation below):
Step S205: determine average transmission power and the maximum delivery power of current electric line in the second scheduled time slot, when when still nonevent the first scheduled time slot is predicted, before described the second scheduled time slot is selected in the first scheduled time slot; When the first scheduled time slot having occurred is added up, described the second scheduled time slot is consistent with the first scheduled time slot.
Here maximum delivery power and the average transmission power of determining electric line in the second scheduled time slot refer to power maximum and the mean value that electric line obtains according to history data in this period of supervision of the second scheduled time slot.
Step S206: the average transmission power of described current transmission and distribution line and maximum delivery power are made to phase division operation, and the result of phase division operation is designated as the first adjustment factor;
In abovementioned steps, determined after the maximum delivery power and average transmission power of electric line, two data can be carried out to computing and obtain the first adjustment factor, this adjustment factor can reflect the impact on electric line utilance due to load kurtosis in electrical network, therefore, can be by the first adjustment factor obtaining by this step for the adjustment to the electric line utilance upper limit.If use P
on averagethe maximum delivery power that represents current electric line in the second scheduled time slot, P
peak valuethe average transmission power that represents current electric line in the second scheduled time slot, can calculate first according to following formula and adjust factor lambda
1, that is:
Step S207: adjust the peak use rate upper limit of described current electric line according to the described first adjustment factor, obtain the average utilization upper limit of current electric line.
By abovementioned steps, obtain after the first adjustment factor, can utilize the electric line utilance upper limit obtaining in this adjustment factor pair step S204 to adjust, the concrete mode of adjusting is a lot, such as, can be considered as an exponential factor by adjusting the factor, this exponential factor is used for asking for the power of electric line utilance, to reach the object of adjusting the electric line utilance upper limit.Also such as, the first adjustment factor can be considered as to a multiplication factor, this multiplication factor and the electric line utilance upper limit are carried out to multiplying, reach the object of adjusting electric line utilance, specific formula for calculation is as follows:
CUME
avg=CUME
peak×λ
1
In the time need to considering the factor of line maintenance and fault recovery, the application can determine the second adjustment factor according to following mode, then utilizes definite electric line utilance upper limit in the second adjustment factor set-up procedure S104.There are three kinds of situations in this factor of line maintenance and fault recovery: the one, and circuit normally moves; The 2nd, circuit is out of service, and reason out of service is that predetermined plan is initiatively stopped transport as required; The 3rd, electrical network is out of service, and reason out of service is forced outage because electrical network breaks down.The application preferably adds up respectively the time length that these three kinds of situations occur within predetermined the second period, and by statistics, obtaining the uptime is T1, unplanned idle time to be that T2 and planned outage time are T3.After counting above-mentioned three time values, according to formula calculating second below, adjust factor lambda
2:
According to above-mentioned formula, obtain λ
2after, can adjust the described current electric line utilance upper limit according to this second adjustment factor, the reason identical with aforementioned consideration load kurtosis, the concrete adjustment mode here also can adopt index replacement, multiplication adjustment etc.
It should be noted that: aforementioned two factors (load kurtosis and grid maintenance and failure condition) are the key factors that affects the electric line utilance upper limit, they never ipsilateral electric line utilance is exerted an influence, these two kinds of factors can be separately for adjusting electric line utilance, no matter consider which factor, all can solve the application's technical problem, obtain with respect to the better technique effect of prior art.Yet, in actual application, in order to obtain as far as possible reflecting really the reasonability of electric line utilance level, two combined factors above can be got up consider, not only with first, adjust the utilance upper limit that the factor is adjusted electric line, and utilize the second adjustment factor to adjust the utilance upper limit of electric line simultaneously, as for when specifically combining adjustment mode, can select according to present case, such as, can be that the first adjustment factor adopts index replacement, factor Ⅱ carries out multiplication adjustment on the result basis after the first adjustment factor adjustment, or contrary, or take same adjustment mode.The application preferably first adjustment factor, the second adjustment factor all adjusts electric line in the mode of multiplication adjustment, according to following formula, carries out:
CUME
avg=CUME
peak×λ
1×λ
2
Wherein: CUME
peakfor the peak use rate upper limit of the electric line that obtains according to claim 1, described λ
1be the first adjustment factor, described λ
2be the second adjustment factor, CUME
avgthe average utilization upper limit for the current electric line after the second adjustment factor is adjusted.Above-mentioned calculating CUME
avgprocess in fact reflected the affect situation of three factors on electric line utilance higher limit, be electric power netting safe running constraint, load kurtosis, maintenance and fault recovery, three factors are considered in the middle of a formula, can be identified the key factor that affects the utilance upper limit.Such as, when the second adjustment factor being taken advantage of in electric line utilance, prescribe a time limit, great changes will take place for this higher limit, illustrates that maintenance and this factor of fault recovery are the central factors that affects the electric line utilance upper limit, should take the corrective measure for this factor.
Aforementioned content describes the method for the maximum and average utilance upper limit of the application's how to confirm electric line in detail, and on this basis, the application also provides the method for the maximum and average utilance nargin of a kind of definite electric line.Referring to Fig. 3, the figure shows the flow process of the peak use rate nargin method of determining electric line.This flow process comprises:
Step S301: determine the minimum cross section of current electric line in the first scheduled time slot, the total N bar transmission line that comprises current electric line of described minimum cross section, the electric line that described N bar transmission line is same electric pressure;
Step S302: the transmission power limit of calculating described minimum cross section;
Step S303: described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
Step S304: described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot are made to phase division operation, the result of computing is defined as to the peak use rate upper limit of current electric line;
Step S305: an actual maximum delivery power of determining current electric line in the first fixed section when pre-;
Step S306: described actual maximum delivery power is made to phase division operation with benchmark transmission power, obtain the actual peak use rate of current electric line;
Step S307: the actual peak use rate of the peak use rate upper limit of current electric line and current electric line is made to difference operation, will make the peak use rate nargin of the result of difference operation as current electric line.
The present embodiment can be determined by above-mentioned steps the peak use rate nargin of electric line, this nargin provides a kind of mode that contrasts electric line practical efficiency and utilance higher limit, contribute to assess the horizontal reasonability of alternating current circuit utilance and Improvement, for transmission line enlarging reconstruction provides quantitative analysis and decision support means.Such as, power transmission and distribution utilance nargin is on the low side, illustrates that further the space of lifting conveying capacity is little under current system constraint, otherwise, if power transmission and distribution utilance nargin is higher, illustrate that capacity of trunk design may be too leading.
It should be noted that: the peak use rate upper limit of above-mentioned electric line can be transformed to the average utilization of electric line, the actual maximum delivery power of above-mentioned electric line can be transformed to the actual average transmission power of electric line, can calculate on this basis like this average utilization nargin of electric line.Particularly:
First ask for actual average load utilization, i.e. the actual average utilance of electric line.If used
represent the mean value of actual fed power, use P
peakthe maximum that represents actual fed power, transmission line actual average load utilization and actual max load utilance can be calculated according to following formula:
P in above formula
maxas previously mentioned, can be in economic transmission power, natural power or thermally-stabilised power limit any, certainly, at the reference power with preferably adopting same form in once determining the utilance upper limit of electric line and utilance nargin process.
Recycling electric line actual average load utilization and maximum load utilance and the aforementioned CUME calculating
avgcalculate average and peak use rate nargin, i.e. average utilization nargin and the peak use rate nargin of electric line:
Average load utilance nargin=CUME
avg-actual average load utilization
Maximum load utilance nargin=CUME
peak-actual max load utilance
In fact, in concrete application process, except utilizing the electric line utilance upper limit to obtain utilance nargin, can also obtain the relative utilance of electric line.Such as, calculate according to the following equation the relative utilance of electric line:
Or,
Aforementioned content is described the embodiment of the method that the application determines the maximum and average utilance upper limit of electric line in detail, and the embodiment of the method for determining the maximum and average utilance nargin of electric line based on the maximum and average utilance of electric line, correspondingly, the application also provides a kind of device of definite electric line peak use rate upper limit, and the device of definite electric line peak use rate nargin.Referring to Fig. 4, the figure shows the composition structure of an embodiment of device of the peak use rate upper limit of definite electric line of the application.This device comprises: section determination unit 401, the first arithmetic element 402, the second arithmetic element 403 and the 3rd arithmetic element 404, wherein:
The first arithmetic element 402, for calculating the transmission power limit of described minimum cross section;
The second arithmetic element 403, for described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
The 3rd arithmetic element 404, makes phase division operation by described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot, the result of computing is defined as to the peak use rate upper limit of current electric line.
The course of work of the peak use rate upper limit device embodiment of above-mentioned definite electric line is: first by section determination unit 401, determine the minimum cross section that comprises N bar electric line in the first scheduled time slot, by the first arithmetic element 402, calculated again the transmission power limit of described minimum cross section, the second arithmetic element 403 is made phase division operation by described transmission power limit with N, the maximum delivery power limit that the result of computing is allowed as current electric line; Finally, by the 3rd arithmetic element 404, maximum delivery power limit and the benchmark transmission power in the first scheduled time slot are made to phase division operation, the result of computing is defined as to the upper limit of electric line peak use rate.This device can be obtained the technique effect identical with preceding method embodiment, for avoiding repetition, repeats no more here.
Aforementioned means embodiment can also carry out some to it according to actual needs to be improved, to obtain asking for the device of other utilances.Such as, in order further to obtain the average utilization upper limit of electric line, except considering, this factor of constraint requirements of electric power netting safe running, to it is also conceivable that line load kurtosis, grid maintenance and fault recovery etc.Particularly:
When considering line load kurtosis, aforementioned means can also comprise the first power determining unit 505, the 4th arithmetic element 506 and the first adjustment unit 507, thereby form a kind of device of the average utilization upper limit of definite electric line, (noting: in this figure, 501～504 with aforesaid 401～404 identical) shown in Figure 5 wherein: the first power determining unit 505, for determining average transmission power and the maximum delivery power of current electric line in the second scheduled time slot, when the first described scheduled time slot does not occur, described the second scheduled time slot is before the first scheduled time slot, when described the first scheduled time slot has occurred, described the second scheduled time slot is the first scheduled time slot, the 4th arithmetic element 506, for the average transmission power of described transmission and distribution line and maximum delivery power are made to phase division operation, the result of phase division operation is designated as the first adjustment factor, the first adjustment unit 507, for adjust the peak use rate upper limit of described electric line according to the described first adjustment factor, obtains the average utilization upper limit of electric line.
When considering grid maintenance and fault recovery factor, the device of the average utilization upper limit of above-mentioned definite electric line can also comprise time statistic unit 508, the 5th arithmetic element 509 and the second adjustment unit 510, wherein: time statistic unit 508, for adding up the uptime T1 of electric line in the second scheduled time slot, unplanned idle time T2 and planned outage time T 3; The 5th arithmetic element 509, for T1 is made to phase division operation with three's sum of T1, T2, T3, the result of phase division operation is designated as the second adjustment factor; The second adjustment unit 510, for adjusting according to described second the average utilization upper limit that the factor is adjusted described electric line.
Referring to Fig. 6, the figure shows the composition structure of device embodiment of the peak use rate nargin of definite electric line that the application provides.This device comprises: determine device 601, the second power determining unit 602, the 6th arithmetic element 603 and the first nargin determining unit 604 of the electric line peak use rate upper limit, wherein:
The device of determining the electric line peak use rate upper limit is the device obtaining according to any mode of aforementioned content introduction;
The second power determining unit 602, for determining the actual maximum delivery power of current electric line in the first preset period of time;
The 6th arithmetic element 603, for described actual maximum delivery power is made to phase division operation with benchmark transmission power, obtains the actual peak use rate of current electric line;
The first nargin determining unit 604, for the definite electric line utilance upper limit of electric line utilance upper limit determining device and the practical efficiency of electric line are made to difference operation, the peak use rate nargin of the result of difference operation as current electric line will be made.
The course of work of above-mentioned definite electric line utilance nargin device embodiment is: first by determining that the device 601 of the electric line peak use rate upper limit obtains the peak use rate upper limit of electric line, then, by the second power determining unit 602, determined the actual fed power of electric line in the first preset period of time, the 6th arithmetic element 603 is made phase division operation by this actual maximum delivery power with benchmark transmission power, obtains the actual peak use rate of electric line; Finally, by the first nargin determining unit 604, the definite peak use rate upper limit of electric line and the actual peak use rate of electric line of electric line peak use rate upper limit determining device made to difference operation, will make the peak use rate nargin of the result of difference operation as current electric line.This device can be obtained the technique effect identical with preceding method embodiment, for avoiding repetition, repeats no more here.It should be noted that: the function by the first nargin determining unit 604 can be known, electric line peak use rate upper limit determining device is not limited to first carry out the electric line peak use rate upper limit and determines work, after it can be placed on the 6th arithmetic element, as long as the utilance higher limit of calculating can be provided for nargin determining unit in time.
Similar with the device of the peak use rate nargin of above-mentioned definite electric line, aforesaid maximum electric line utilance is transformed to electric line average utilization, the actual maximum delivery power conversion of electric line is actual average maximum delivery power, can construct the device of the average utilization nargin of determining electric line, that is: the device of determining the average utilization nargin of electric line comprises the device of the average utilization upper limit of aforesaid definite electric line, the 3rd power determining unit, the 7th arithmetic element and the second nargin determining unit, wherein: described the 3rd power determining unit, for determining the actual average transmission power of current electric line in the first preset period of time, described the 7th arithmetic element, for described actual average transmission power and benchmark transmission power are made to phase division operation, obtains the actual average utilance of current electric line, described the second nargin determining unit, for the definite average utilization upper limit of electric line and the actual average utilance of current electric line of the device of the average utilization upper limit of aforesaid definite electric line made to difference operation, the average utilization nargin of the result of difference operation as current electric line will be made.For the operation principle of this device, the technique effect of obtaining etc., with aforementioned similar, for avoiding repetition, no longer describe in detail here.
In addition, also it should be noted that: easy for what narrate, the various distortion implementations of above-described embodiment of this specification and embodiment stress is all the difference with other embodiment or mode of texturing, between each situation identical similar part mutually referring to.Especially install embodiment part, for fear of repetition, only carried out concise and to the point description, can be with reference to the content of aforesaid embodiment of the method when understanding device embodiment.Each unit of device embodiment described above can or can not be also physically to separate, and both can be positioned at a place, or also can be distributed to a plurality of net environments.In actual application, can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme, those of ordinary skills, in the situation that not paying creative work, are appreciated that and implement.
The above is only the application's embodiment; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the application's protection range.
Claims (11)
1. a method for the peak use rate upper limit of definite electric line, is characterized in that, the method comprises:
Determine the minimum cross section at current electric line place in the first scheduled time slot, the total N bar transmission line that comprises current electric line of described minimum cross section, the electric line that described N bar transmission line is same electric pressure;
Calculate the transmission power limit of described minimum cross section;
Described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
Described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot are made to phase division operation, the result of computing is defined as to the peak use rate upper limit of current electric line.
2. a method for the average utilization upper limit of definite electric line, is characterized in that, described method comprises:
Method according to claim 1 is determined the peak use rate upper limit of current electric line;
Average transmission power and the maximum delivery power of determining current electric line in the second scheduled time slot, when the first scheduled time slot described in claim 1 does not occur, described the second scheduled time slot is before the first scheduled time slot; When the first scheduled time slot described in claim 1 has occurred, described the second scheduled time slot is the first scheduled time slot;
The average transmission power of current transmission and distribution line and maximum delivery power are made to phase division operation, and the result of phase division operation is designated as the first adjustment factor;
According to the described first adjustment factor, adjust the peak use rate upper limit of described current electric line, obtain the average utilization upper limit of current electric line.
3. method according to claim 2, is characterized in that, described method also comprises:
Add up uptime T1, unplanned idle time T2 and the planned outage time T 3 of current electric line in the second scheduled time slot;
T1 is made to phase division operation with T1, T2, T3 three's sum, and the result of phase division operation is designated as the second adjustment factor;
According to described second, adjust the average utilization upper limit that the factor is adjusted described current electric line.
4. method according to claim 3, is characterized in that, the described average utilization upper limit of adjusting described current electric line according to the described second adjustment factor is specially:
CUME
avg=CUME
peak×λ
1×λ
2
Wherein: described CUME
peakfor the peak use rate upper limit of the current electric line that obtains according to claim 1, described λ
1be the first adjustment factor, described λ
2be the second adjustment factor, described CUME
avgthe average utilization upper limit for the current electric line after the second adjustment factor is adjusted.
5. a method for the peak use rate nargin of definite electric line, is characterized in that, described method comprises:
Determine the actual maximum delivery power of current electric line in the first scheduled time slot;
Described actual maximum delivery power is made to phase division operation with benchmark transmission power, obtain the actual peak use rate of current electric line;
The peak use rate upper limit of the current electric line that method according to claim 1 is obtained and the actual peak use rate of current electric line are made difference operation, will make the peak use rate nargin of the result of difference operation as current electric line.
6. a method for the average utilization nargin of definite electric line, is characterized in that, described method comprises:
Determine the actual average transmission power of current electric line in the first scheduled time slot;
Described actual average transmission power and benchmark transmission power are made to phase division operation, obtain the actual average utilance of current electric line;
By making difference operation according to the average utilization upper limit of current electric line and the actual average utilance of current electric line that in claim 2 to 4, the method described in any one obtains, the average utilization nargin of the result of difference operation as current electric line will be made.
7. a device for the peak use rate upper limit of definite electric line, is characterized in that, this device comprises: section determination unit, the first arithmetic element, the second arithmetic element and the 3rd arithmetic element, wherein:
Described section determination unit, for determining the minimum cross section of current electric line in the first scheduled time slot, the total N bar transmission line that comprises current electric line of described minimum cross section, the electric line that described N bar transmission line is same electric pressure;
Described the first arithmetic element, for calculating the transmission power limit of described minimum cross section;
Described the second arithmetic element, for described transmission power limit is made to phase division operation with N, the maximum delivery power limit that the result of computing is allowed as current electric line;
Described the 3rd arithmetic element, makes phase division operation by described maximum delivery power limit and the benchmark transmission power in the first scheduled time slot, the result of computing is defined as to the peak use rate upper limit of current electric line.
8. a device for the average utilization upper limit of definite electric line, is characterized in that, described device comprises peak use rate upper limit determining device, the first power determining unit, the 4th arithmetic element and the first adjustment unit, wherein:
Described peak use rate upper limit determining device is device claimed in claim 7, for determining the peak use rate upper limit of current electric line;
Described the first power determining unit, for determining average transmission power and the maximum delivery power of current electric line in the second scheduled time slot, when the first scheduled time slot described in claim 7 does not occur, described the second scheduled time slot is before the first scheduled time slot; When the first scheduled time slot described in claim 7 has occurred, described the second scheduled time slot is the first scheduled time slot;
Described the 4th arithmetic element, for the average transmission power of current transmission and distribution line and maximum delivery power are made to phase division operation, the result of phase division operation is designated as the first adjustment factor;
Described the first adjustment unit, for adjust the peak use rate upper limit of described current electric line according to the described first adjustment factor, obtains the average utilization upper limit of current electric line.
9. device according to claim 8, is characterized in that, this device also comprises time statistic unit, the 5th arithmetic element and the second adjustment unit, wherein:
Described time statistic unit, for adding up the uptime T1 of current electric line in the second scheduled time slot, unplanned idle time T2 and planned outage time T 3;
Described the 5th arithmetic element, for T1 is made to phase division operation with T1, T2, T3 three's sum, the result of phase division operation is designated as the second adjustment factor;
Described the second adjustment unit, for adjusting according to described second the average utilization upper limit that the factor is adjusted described current electric line.
10. the device of the peak use rate nargin of a definite electric line, it is characterized in that, this device comprises device, the second power determining unit, the 6th arithmetic element and the first nargin determining unit of the peak use rate upper limit of definite electric line claimed in claim 7, wherein:
Described the second power determining unit, for determining the actual maximum delivery power of current electric line in the first preset period of time;
Described the 6th arithmetic element, for described actual maximum delivery power is made to phase division operation with benchmark transmission power, obtains the actual peak use rate of current electric line;
Described the first nargin determining unit, for the definite peak use rate upper limit of electric line and the actual peak use rate of current electric line of the device of the peak use rate upper limit by definite electric line claimed in claim 7 made to difference operation, the peak use rate nargin of the result of difference operation as current electric line will be made.
The device of the average utilization nargin of 11. 1 kinds of definite electric lines, it is characterized in that, this device comprises device, the 3rd power determining unit, the 7th arithmetic element and the second nargin determining unit of the average utilization upper limit of the definite electric line described in claim 8 or 9, wherein:
Described the 3rd power determining unit, for determining the actual average transmission power of current electric line in the first preset period of time;
Described the 7th arithmetic element, for described actual average transmission power and benchmark transmission power are made to phase division operation, obtains the actual average utilance of current electric line;
Described the second nargin determining unit, for the definite average utilization upper limit of electric line and the actual average utilance of current electric line of the device of the average utilization upper limit of the definite electric line by described in claim 8 or 9 made to difference operation, the average utilization nargin of the result of difference operation as current electric line will be made.
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