CN104657910A - Daily operation evaluation method for power grid - Google Patents
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Abstract
The invention discloses a daily operation evaluation method for a power grid, and belongs to the technical field of power system scheduling operation control. The method comprises the steps of constructing a daily power grid scheduling operation evaluation index set, wherein the index set comprises four aspects of the operation, namely a safety index, an economy index, a fairness index and an environment-friendliness index; acquiring corresponding data of daily operation of the power grid according to constructed evaluation indexes to calculate each index; integrating calculated index results, and evaluating a result of the daily operation of the power grid. The evaluation on the operation of the power grid is limited in the daily range, so that the evaluation on the power grid operation result is more targeted; a reference can be provided for a power grid operating worker for making a scheduling operation strategy; the safety index, the economy, the fairness and the environment-friendliness of the power grid operation are improved.
Description
Technical field
The invention belongs to electric power system dispatching and run control technology field, particularly a kind of electrical network postitallation evaluation every day method.
Background technology
It is all one of focus of research to the research of electrical network evaluation method all the time.Evaluation method at present for operation of power networks concentrates in the long-term assessment to electrical network mostly, and the target of the existing research to electrical network evaluation method or the quality of more different power network planning scheme, play the effect of programmed decision-making; Or the ruuning situation long-term to electrical network carries out macroscopic evaluation, instructs the planning operation of following electrical network, research is seldom had to discuss to electrical network postitallation evaluation every day method.
For the emphasis of the evaluation of electrical network, it is all the emphasis of evaluation study to the security of operation of power networks and Economic Evaluation all the time, in security, the index of general consideration has N-1 percent of pass, N-2 percent of pass, short circuit current level, section load factor, active power margin, Reactive Power Margin, rate of qualified voltage, frequency qualification rate, load prediction qualification rate, accident number of times etc., in different evaluation methods, because evaluation object, object are different, the index of the safety evaluatio selected also difference to some extent; In Economic Evaluation, the index of general consideration has power selling income, rate of profit, line loss per unit, peak-valley difference, number of working hours based on maximum load etc., same, economy aspect evaluation index choose also because the index chosen in each different evaluation method that do not coexist of evaluation object and object can difference to some extent; Comparatively rare in correlative study at present to the evaluation of operation of power networks fairness, mentioned by relevant evaluation index only has in " national grid " three is public " management and running regulation ", but main it is considered that evaluate respectively from generation schedule progress indicator, gas-to electricity hour sequence index and the power generation situation of power generation load rate index three indexs to each power plant; To the evaluation of the electrical network feature of environmental protection at present along with the rise of " low-carbon (LC) " concept, the temperature of research is also more and more higher, the evaluation index chosen comprises the discharge capacity etc. of clean energy resource generating accounting, clean energy resource generated energy, coal consumption, various pollutant, also different to the consideration mode of these indexs in different evaluation methods.
At present for dispatching of power netwoks operations staff, lack the evaluation to the every day operation of electrical network, the running status of actual electric network every day can not be understood in time, therefore to the same day electrical network dispatching running way whether have the space of improving further there is no clear and definite foundation, electrical network with realizing safer, economical, fair and environmental protection optimizing operation can not be instructed targetedly.
Summary of the invention
The object of the invention is the weak point to not yet considering the evaluation of every day operation in existing electrical network appraisement system, a kind of electrical network postitallation evaluation every day method is proposed, realize evaluation to electrical network operational effect every day, and by every day postitallation evaluation result analysis to be electrical network safe, economical, justice and environmental protection and energy saving optimizing operation provide guidance.
A kind of electrical network postitallation evaluation every day method that the present invention proposes, is characterized in that, comprise the following steps:
A: build dispatching of power netwoks every day postitallation evaluation index set, this index set comprises the security of operation, economy, fairness and feature of environmental protection index four aspects;
B: the corresponding data that the evaluation index built according to steps A gathers the every day operation of electrical network calculates each index;
C: carry out comprehensively, evaluating the result of the every day operation of electrical network to the index result calculated in step B.
Beneficial effect of the present invention
The electrical network postitallation evaluation every day method that the present invention proposes, from the actual demand that dispatching of power netwoks runs, propose a set of index system being applicable to electrical network postitallation evaluation every day, can realize operating in security every day to electrical network, economy, the comprehensive evaluation of fairness and the feature of environmental protection four aspects, concrete appraisal result is beneficial to the running status that dispatching of power netwoks operations staff understands actual electric network every day, thus conveniently find out operation typical case's day preferably, further by comparative analysis, current dispatching running way can be discussed and whether have the space of improving further, for the optimizing operation of electrical network provides guidance.
Accompanying drawing explanation
Fig. 1 is electrical network postitallation evaluation every day index system establishment of the present invention and evaluation method process flow diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
The present invention proposes a kind of electrical network postitallation evaluation every day method, it is characterized in that, comprises the following steps:
A: build dispatching of power netwoks every day postitallation evaluation index set, this index set comprises the security of operation, economy, fairness and feature of environmental protection index four aspects; Be respectively described below:
Safety indexes comprises plan safety, security of operation, qualification and device security and power grid security four classifications, and wherein plan safety comprises N-1 percent of pass, the N-2 percent of pass of main cross sections and short-circuit current exceeding standard rate three indexs; Security of operation comprises main cross sections load factor, main cross sections load balancing degrees, spinning reserve rate, Reactive Power Margin, 220kV Above Transmission Lines tripping operation unsuccessful reclosing number of times, 220kV Above Transmission Lines relay protection performance factor, more than 220kV transformer maximum load rate, 220kV Above Transmission Lines maximum load rate, generator chaser number of times, generator chaser stoppage in transit hour dozens of index; Qualification comprises rate of qualified voltage, frequency qualification rate and load prediction qualification rate three indexs; Power grid security and device security comprise severely injured several four indexs of power grid accident number, equipment breakdown number, personal death toll and the person.The concrete account form of each index is as follows:
N-1 percent of pass:
The requirement of N-1 percent of pass in order to check electrical network whether can meet first order safety and stability standard, the N-1 percent of pass of the N-1 percent of pass indicator-specific statistics designated components in the present invention;
Computing formula is such as formula (1):
Provide N-1 percent of pass every day according to collection grid company to obtain.
Main cross sections N-2 percent of pass:
Main cross sections N-2 percent of pass in order to check the second level safety and stability standard of electrical network,
Computing formula is such as formula (2):
The calculated value providing N-2 percent of pass according to collection grid company every day obtains;
Short-circuit current exceeding standard rate
Short-circuit current exceeding standard rate is specify to be added up bus that short-circuit current exceeds standard in the bus added up and account for the ratio of all statistics buses, and the electric current standard of exceeding standard is that 330kV and above bus statistics are greater than 50kA, and 220kV bus is greater than 40kA;
Computing formula is such as formula (3):
The calculated value providing short-circuit current exceeding standard rate according to collection grid company every day obtains;
Main cross sections load factor
For adding up the load (because the load factor of each period section is different in a day, having considered that different section needs statistics) of the main cross sections of specifying simultaneously, in safety indexes, main cross sections load factor gets main cross sections maximum load rate;
Computing formula is such as formula (4):
In formula, P
imaxbe the maximum load that i-th section can bear, P
ibe the load of i-th section at certain statistical time range, Ω is selected main cross sections collection; For different electrical networks, choosing of main cross sections is selected according to the actual conditions of electrical network;
Main cross sections load balancing degrees:
For adding up the balanced intensity of each section load factor, institute's value should be the maximal value of specifying the load balancing degrees calculated by the main cross sections of adding up one day 96 point data;
Computing formula is as (5):
Spinning reserve rate:
Positive and negative for subsequent use for considering, be the minimum value positive and negative for subsequent use utilizing one day each generator output data of 96 and generator capacity to calculate spinning reserve rate;
Computing formula is such as formula (6):
In formula, P
imaxfor the maximum active power that can send at the generator of certain statistics point i-th start, P
iminfor the minimum active power that can send at the generator of certain statistics point i-th start, P
ifor certain statistics point i-th actual active power sent of generator, Ω is the generator collection of certain statistics point start; Finally get the minimum value in positive and negative spinning reserve rate.
Reactive Power Margin:
For considering idle in-situ balancing factor, utilize one day each generator reactive of 96 to go out force data and generator reactive capacity, subregion calculates the minimum value of Reactive Power Margin, then gets the minimum value of all subregion Reactive Power Margins.
Computing formula is such as formula (7):
In formula, Q
imaxfor the maximum reactive power that can send at the generator of certain statistics point i-th start, Q
ifor certain statistics point i-th actual reactive power sent of generator, Ω
ifor the generator collection of certain subregion statistics point start, Ω is partitioned set;
The unsuccessful number of 220kV Above Transmission Lines fault reclosing:
Obtain by adding up the unsuccessful number of times of reclosing that breaks down of 220kV and Above Transmission Lines in a day, this index can reflect the situation that electrical network broke down in a day;
220kV and Above Transmission Lines circuit relay protection performance factor:
According to statistics in one day when 220kV line failure, the ratio of relay protection correct operation obtains,
Computing formula is such as formula (8):
More than 220kV transformer maximum load rate:
For adding up the load of main transformer (more than 220kV) (because the load factor of each period transformer is different in one day, considered that different transformer needs statistics simultaneously), transformer load rate statistics transformer maximum load rate in safety indexes;
Computing formula is such as formula (9):
In formula, P
imaxbe the maximum load that i-th transformer can bear, Pi is the load of i-th transformer at certain statistical time range, and Ω is the transformer collection of selected statistics;
220kV and Above Transmission Lines maximum load rate:
For adding up load (because the load factor of each period circuit is different in one day, having considered that different circuit needs statistics) the circuit load factor statistics circuit maximum load rate in safety indexes of main line (220kV and more than) simultaneously.
Computing formula is such as formula (10):
In formula, P
imaxbe the maximum load that i-th circuit can bear, Pi is the load of i-th circuit at certain statistical time range, and Ω is the sets of lines of statistics;
Generator chaser accident number:
Add up generator chaser number in a day (comprising thermoelectricity, water power, wind-powered electricity generation, biomass energy power station and pump-up power station) to obtain;
Generator chaser stoppage in transit hourage:
Add up generator chaser in a day (comprising thermoelectricity, water power, wind-powered electricity generation, biomass energy power station and pump-up power station) stoppage in transit hourage to obtain;
Rate of qualified voltage:
Rate of qualified voltage to calculate with total sampling number according to qualified the counting of voltage in each observation station point sampling data every day 96;
Computing formula is such as formula (11):
Rate of qualified voltage value every day provided by gathering electrical network obtains;
Frequency qualification rate:
Frequency qualification rate to calculate with total sampling number according to qualified the counting of each observation station point sampling data every day 96 medium frequency, and frequency qualification rate gets the frequency qualification rate of (50 ± 0.1Hz);
Computing formula is such as formula (12):
Daily load prediction qualification rate
Daily load prediction qualification rate is counted accurately according to load prediction in each observation station point sampling data every day 96 and to be calculated with total sampling number, and daily load prediction value adopts the result a few days ago predicted,
Computing formula is such as formula (13):
The daily load prediction qualification rate provided every day by gathering grid company obtains;
Power grid accident number of times:
Adopt according to " State Grid Corporation of China's electrical production accident investigation code " the general power grid accident defined, great power grid accident and short-term load total number of accident;
Equipment breakdown number of times
Adopt general device accident, substantial equipment accident and the especially big equipment breakdown sum defined according to " State Grid Corporation of China's electrical production accident investigation code ";
Person death toll:
Adopt the number causing personnel death defined according to " State Grid Corporation of China's electrical production accident investigation code ";
Adopt personal severely injured number
Adopt the number causing personnel's severe injury defined according to " State Grid Corporation of China's electrical production accident investigation code "; Economy aspect comprises plant factor, load level and income three classifications, and wherein plant factor comprises the load factor two indices of the Rate of average load of 220kV and Above Transmission Lines, 220kV and above transformer; Load level comprises average daily rate of load condensate, peak-valley difference and pumped storage unit weighting electricity three indexs; Income level comprises average purchase electricity price and network loss two indices; The concrete account form of each index is as follows:
220kV and Above Transmission Lines Rate of average load
For adding up the load factor of circuit.Because the load factor of each period circuit is different in one day, considered that different circuit needs statistics, so line load rate statistics circuit Rate of average load, computing formula is such as formula (14) simultaneously:
P in formula
imaxbe the maximum load that i-th circuit can bear, P
ibe the load of i-th circuit at certain statistical time range, Ω is selected sets of lines;
220kV and above transformer Rate of average load
For adding up the load of main transformer.Because the load factor of each period transformer is different in one day, considered that different transformer needs statistics, so transformer load rate statistics transformer Rate of average load simultaneously; Computing formula is such as formula (15):
P in formula
imaxbe the maximum load that i-th transformer can bear, P
ibe the load of i-th transformer at certain statistical time range, Ω is the transformer collection of selected statistics;
Average daily rate of load condensate
Average daily rate of load condensate is the ratio of average daily load and peak load, and daily load rate is larger, illustrates that in one day, load level is more stable, more favourable to the economy of electrical network; Computing formula is such as formula (16):
Peak-valley difference
Peak-valley difference is the difference of network load maxima and minima in one day 96 point data.Peak-valley difference is less, illustrates that the load level of system in a day is more stable, more favourable to the economy of operation of power networks; Computing formula is such as formula (17):
Day peak-valley difference=Daily treatment cost-minimum load (17)
The weighting electricity of pumped storage unit
The use of pumped storage unit can reduce the peak-valley difference of electrical network, is conducive to the economy of system cloud gray model, considers the impact of pumped storage unit for economy by the weighting electricity of pumped storage unit, and the account form of weighting electricity is such as formula (18):
In above formula, P
pipumped storage unit the exerting oneself of moment i (getting generating on the occasion of), α
ifor weighted value, value is determined by following formula (19) according to the load curve of electrical network:
Average purchase electricity price index is the weighted mean value of electricity price of water power, thermoelectricity, wind-powered electricity generation, outer power transmission.
Transmission loss index is the electrical network electricity that network consumes in transmission of electric energy process, can represent by the difference of purchase of electricity and electricity sales amount.Generally get the statistical value of EMS.
The generation schedule progress indicator of index except proposing in " national grid " three is public " management and running specify " that fairness aspect of the present invention is chosen, gas-to electricity hour sequence index, outside these three indexs of power generation load rate index, also increase Plan rescheduling rationality index every day newly, altogether four indexs; Concrete account form is as follows:
Generation schedule progress indicator, for evaluating respectively all kinds of generating plant generation schedule progress situation, wherein the non-cogeneration plant that supplies evaluates according to generation schedule unit adjustable utilization factor deviation and the difference of the average adjustable utilization factor deviation of unit in province territory, and index normal range is determined according to ± 3%; With non-for compared with cogeneration plant, the index for cogeneration plant can fine tune at Different periods, and suitably advanced according to first quarter Mo, end is suitable for the second quarter, and the third quater Mo, suitably delayed principle was evaluated.
The computing formula of utilization factor deviation that generation schedule unit is adjustable is such as formula (20):
Adjustable utilization factor-generation schedule modular plan is adjustable utilization factor (20) that utilization factor deviation that generation schedule unit is adjustable (%)=generation schedule unit is actual
In above formula accordingly every computing formula such as formula (21):
In province territory, the computing formula of the average adjustable utilization factor deviation of unit is such as formula (22):
In province territory, in average adjustable utilization factor deviation (the %)=province territory of unit, in the average actual adjustable utilization factor-province territory of unit, unit on average plans adjustable utilization factor (22)
In above formula accordingly every computing formula such as formula (23):
Definition generation schedule progress equilibrium degree index: be used for evaluating the generation schedule progress of unit, its computing method are as shown in the formula shown in (24):
Generation schedule progress indicator statistics be the aggregate-value of the annual plan that each unit is completed till now from annual January 1.
Gas-to electricity hour sequence index, carry out comprehensive evaluation by a gas-to electricity hour equilibrium degree index:
To utilize hour according to annual generation schedule, send that transaction utilizes hour outside, power constraint utilizes and hour utilize a hour sequence to evaluate to size unit respectively, namely an aforementioned utilization hour reversal of the natural order of things extreme difference must not be caused to expand because of scheduling self reason.
Genset utilize hour computing formula such as formula (25):
The computing formula that in province territory, genset on average utilizes hour is such as formula (26):
Definition gas-to electricity hour equilibrium degree index carries out comprehensive evaluation, as shown in the formula (27) to a gas-to electricity hour sequence index:
A gas-to electricity hour equilibrium degree index belongs to the smaller the better type index, and gas-to electricity hour balanced angle value is less, illustrates that the gas-to electricity hourage of each unit is more balanced.For consider 600MW unit utilize hourage to be greater than 300MW unit utilize this requirement of hourage, then can consider a gas-to electricity hour equilibrium degree by following formula (28):
Namely the coefficient that is less than 1 is multiplied by the gas-to electricity hourage of 600MW unit, the coefficient (the concrete value of coefficient can adjust according to the actual conditions of electrical network) that one is greater than 1 is multiplied by the gas-to electricity hourage of 300MW unit, and then calculate gas-to electricity hour equilibrium degree index, can ensure that the gas-to electricity hourage of the 600MW unit when gas-to electricity hour equilibrium degree index gets ideal value 0 is greater than 300MW unit.
Power generation load rate index
Because unit generation rate of load condensate affects comparatively large by the factor such as load factor, power supply architecture, therefore evaluate with the difference of load factor in province territory to economize the average power generation load rate of unit in territory;
Unit generation rate of load condensate computing formula is such as formula (29):
The computing formula of the average power generation load rate of unit is such as formula (30) inside the province:
In province territory, load factor calculates with 96 daily load curve data.
To power generation load rate index, the average power generation load rate of unit and economize the difference of load factor in territory every day in the province territory considering every day when every day is evaluated.In province territory, load factor calculates and calculates with average daily load factor.
Every day Plan rescheduling rationality index
For evaluating the rationality adjusted under existing progress very not rational situation, (even generation schedule unit i had completed annual electricity generation plan ratio before the same day is P
i, generation schedule unit j had completed annual electricity generation plan ratio before the same day is P
jif both differ greatly, then when daily generation should embody adjustment corresponding with it.)；
Account form is such as formula (31).
Then M should be considered
iwith
trend whether consistent, that is: respectively to M
iwith
sort, corresponding sequence number is respectively SortM
iand SortN
i, definition coincident indicator is as shown in the formula (32):
Be generated energy sequence and the inverse having completed annual plan ratio to sort the difference absolute value sum of sequence number;
The index of feature of environmental protection aspect comprises clean energy resource use, resource consumption and pollutant emission four classifications, wherein clean energy resource uses and comprises clean energy resource generating accounting and clean energy resource generated energy two indices, resource consumption comprises the average coal consumption of thermoelectricity and hydropower station water consumption rate two indices, and pollutant emission comprises unit quantity of electricity SO2 emissions, unit quantity of electricity nitrogen oxide emission, unit quantity of electricity dust discharge amount and unit quantity of electricity solid waste discharge capacity four indexs; Circular is described as follows:
Clean energy resource generating accounting index
For considering the ratio in the energy structure that clean energy resource electrical network is total, clean energy resource mainly comprises water power, wind-powered electricity generation, sun power, biomass energy etc.; Clean energy resource generating accounting is higher, and the environmental requirement of electrical network is better, and computing formula is such as formula (33):
Clean energy resource target generated output
For adding up clean energy resource generated energy.The generated energy of clean energy resource is more, also better to the feature of environmental protection.
The average coal consumption index of thermoelectricity
For adding up the average coal consumption of thermoelectricity generating every day, evaluate the efficiency of fired power generating unit.The average coal consumption of fired power generating unit is lower about favourable to environmental protection.
Hydropower station water consumption rate index
This index is for representing the utilization ratio of power station to water resource, and computing formula is such as formula (34):
Unit quantity of electricity SO2 emissions index is:
Add up sulfur dioxide pollution thing discharge capacity in a day.SO2 emissions convert the SO2 emissions often spending electricity.
Unit quantity of electricity nitrogen oxide emission index is:
Add up nitrogen oxides pollution thing discharge capacity in a day.Nitrogen oxide emission converts the nitrogen oxide emission of often spending electricity.
Unit quantity of electricity dust emission figureofmerit is:
Add up dust discharge amount in a day.Dust discharge amount converts the dust discharge amount of often spending electricity again.
Unit quantity of electricity solid waste discharge capacity index is:
Add up solid waste discharge capacity in a day.Solid waste discharge capacity converts the solid waste discharge capacity often spending electricity again.
Above-mentioned each evaluation index set is as shown in table 1 below.
Table 1 electrical network postitallation evaluation every day index set
B: the corresponding data that the evaluation index built according to steps A gathers the every day operation of electrical network calculates each index;
C: carry out comprehensively, evaluating the result of the every day operation of electrical network to the index result calculated in step B.
Comprehensive method is carried out much to desired value, provides in the present embodiment by analytical hierarchy process agriculture products weight, carry out the evaluation comprehensively realized operation conditions every day by TOPSIS method; Concrete steps are as follows:
(C-1) weight of each index when carrying out comprehensive (adopting the step of analytical hierarchy process) is determined with analytical hierarchy process; Present embodiment is carried out comprehensively, first determine the weight of security, economy, fairness and feature of environmental protection index various aspects classification, determine the weight of each index in same kind again, finally according to the comprehensive weight score of each aspect index as assessed value, concrete outcome (can need to modify to the weight of each index according to the emphasis evaluated in specific implementation process) as shown in table 2 below.
The weight of each index that table 2 analytical hierarchy process is determined
When carrying out index comprehensive evaluation score, for power grid security and device security index, if operation of power networks or equipment operate in the same day there occurs accident, then the score indirect assignment of each index of the security on the same day is 0.
(C-2) after determining the weight of each index, carry out further comprehensive before, need first to determine the average of each index, positive ideal solution and minus ideal result.Average
mode of specifically choosing elects the mean value of the every earning in a day after preceding year (time range can be modified as required) each index weighted as.Positive ideal solution and minus ideal result then can add up over the optimum value of 1 year (time range can be modified as required) interior index and worst-case value as positive ideal solution and minus ideal result.(C-3) equalization method is adopted to carry out nondimensionalization process to index calculate result, for variable x
ijif its average is
even then equalization method:
(C-4) TOPSIS method operational effect every day to security, economy, the feature of environmental protection and fairness four aspects is adopted to mark.The appraisal result of four aspect indexs utilizes radar map to show.
Adopt the inventive method, management and running personnel can by going out for the favourable scene of operation of power networks to the comparative analysis of the not score of the various aspects index of same date, thus instruct the management and running of electrical network, improve the security of operation of power networks, economy, fairness and the feature of environmental protection.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (6)
1. an electrical network postitallation evaluation every day method, is characterized in that, comprise the following steps:
A: build dispatching of power netwoks every day postitallation evaluation index set, this index set comprises the security of operation, economy, fairness and feature of environmental protection index four aspects;
B: the corresponding data that the evaluation index built according to steps A gathers the every day operation of electrical network calculates each index;
C: carry out comprehensively, evaluating the result of the every day operation of electrical network to the index result calculated in step B.
2. the method for claim 1, is characterized in that, specifically comprises plan safety, security of operation, qualification and device security and power grid security four classifications in the security aspect index of the operation in described steps A; Main cross sections maximum load rate wherein in safety indexes is the maximum load rate of corresponding circuit, transformer or section, calculates respectively as shown in the formula (1), shown in (2) and (3);
In above formula, P
imaxbe the maximum load that i-th section can bear, P
ibe the load of i-th section at certain statistical time range, Ω is selected main cross sections collection; For different electrical networks, choosing of main cross sections is selected according to the actual conditions of electrical network;
In above formula, P
imaxbe the maximum load that i-th transformer can bear, P
ibe the load of i-th transformer at certain statistical time range, Ω is the transformer collection of selected statistics;
In above formula, P
imaxbe the maximum load that i-th circuit can bear, P
ibe the load of i-th circuit at certain statistical time range, Ω is the sets of lines of statistics.
3. the method for claim 1, it is characterized in that, economy aspect index in described steps A comprises plant factor, load level and income three classifications, wherein, load factor index adopts corresponding circuit, transformer Rate of average load, and it calculates such as formula shown in (4) and (5):
In above formula, P
imaxbe the maximum load that i-th circuit can bear, P
ibe the load of i-th circuit at certain statistical time range, Ω is selected sets of lines;
In above formula, P
imaxbe the maximum load that i-th transformer can bear, P
ibe the load of i-th transformer at certain statistical time range, Ω is the transformer collection of selected statistics;
The computing method of the pumped storage unit weighting electricity index of economy aspect are as shown in the formula (6):
In formula, P
pibe pumped storage unit exerting oneself at moment i, get generating on the occasion of, α
ifor weighted value, value is determined by following formula (7) according to the load curve of electrical network;
4. the method for claim 1, is characterized in that, the fairness aspect index in described steps A comprises generation schedule progress indicator, gas-to electricity hour sequence index, power generation load rate index and every day Plan rescheduling rationality index;
Wherein, generation schedule progress equilibrium degree index is defined: be used for evaluating the generation schedule progress of unit, it is calculated as follows formula (8):
A gas-to electricity hour sequence index gas-to electricity hour equilibrium degree index carries out comprehensive evaluation, its calculate such as formula
Every day, Plan rescheduling rationality index was for evaluating the rationality adjusted under existing progress very not rational situation; This index calculate mode is such as formula (10):
Then M should be considered
iwith
trend whether consistent, that is: respectively to M
iwith
sort, corresponding sequence number is respectively SortM
iand SortN
i, definition coincident indicator is as shown in the formula (11):
Be generated energy sequence and the inverse having completed annual plan ratio to sort the difference absolute value sum of sequence number.
5. the method for claim 1, is characterized in that, the index of the feature of environmental protection aspect in described steps A comprises clean energy resource use, resource consumption and pollutant emission four classifications.
6. the method for claim 1, is characterized in that, described step C adopts analytical hierarchy process agriculture products weight, carries out the evaluation comprehensively realized operation conditions every day by TOPSIS method.
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