CN107274052A - Power distribution network operation grade appraisal procedure and system containing distributed energy - Google Patents
Power distribution network operation grade appraisal procedure and system containing distributed energy Download PDFInfo
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Abstract
The present invention relates to a kind of power distribution network operation grade appraisal procedure and system containing distributed energy, method includes：The index evaluation model that the power distribution network based on life cycle management runs economic benefit is set up, the evaluation index of assessment models is determined；According to the economy parameter of the regional extent of power distribution network to be assessed, load level, load character and dependability parameter, the basic data of the corresponding power distribution network to be assessed of the evaluation index is obtained；The index value of each evaluation index is calculated according to the expected service life of the power equipment of power distribution network to be assessed and the basic data；The operation economic benefit of the power distribution network to be assessed is obtained according to the assessment models and each index value.Technical solution of the present invention, with more science, evaluation process meets objective reality situation, efficiency high and accuracy height.
Description
Technical field
The present invention relates to distribution network technology field, more particularly to a kind of power distribution network operation grade containing distributed energy
Appraisal procedure and system.
Background technology
Sharply increased with the fast-developing electricity needs of social productive forces, the demand of distribution network construction also with day
It is all to increase.Therefore, the power supply enterprise being characterized with capital-intensive realizes assets in the urgent need to carrying out the distribution network planning of lean
The scientific and rationalization of investment.
Along with developing rapidly for new energy power generation technology, the grid-connected scale of distributed energy increasingly increases.In this feelings
Under condition, the electrical energy production of distributed energy will produce that very important influence, i.e. distributed energy will be grid-connected to be subtracted in power distribution network
The electricity sales amount of few power distribution network, and then reduce the power selling income of power distribution network.
The operation economic benefit of power distribution network be weigh enterprise during operation enterprise investment whether scientific and reasonable weight
Want evaluation index.In order to promote power distribution network assets investment decision-making to develop to lean, the operation economy of power distribution network must just be imitated
Benefit is accurately assessed, and power distribution network is referred to as distribution from electricity from buying to a series of activities such as the conveying, distribution, sale of electricity
The operation process of net.Economic benefit is the important information for needing to obtain.
Traditional power distribution network economic evaluation technology, is mainly based upon artificial statistical, the shortcoming section in evaluation process
It is objective to learn, and efficiency is low and lacks accuracy.
The content of the invention
Based on this, it is necessary to for efficiency it is low and lack accuracy the problem of there is provided a kind of distribution containing distributed energy
Net operation grade appraisal procedure and system
A kind of power distribution network operation grade appraisal procedure containing distributed energy, including：
(1) the index evaluation model that the power distribution network based on life cycle management runs economic benefit is set up, determines assessment models
Evaluation index, the evaluation index includes：Assets year-by-year average investment amount, annual overhaul O＆M cost value, year
Loss of outage value at cost, scrap cost of disposal value and annual electricity income volume；
(2) according to the economy parameter of the regional extent of power distribution network to be assessed, load level, load character and reliability
Parameter, obtains the basic data of the corresponding power distribution network to be assessed of the evaluation index；
(3) each is calculated according to the expected service life of the power equipment of power distribution network to be assessed and the basic data to comment
The index value of valency index item；
(4) the operation economic benefit of the power distribution network to be assessed is obtained according to the assessment models and each index value.
A kind of power distribution network operation grade assessment system containing distributed energy, including：
Assessment models build module, and the index evaluation of economic benefit is runed for setting up the power distribution network based on life cycle management
Model, determines the evaluation index of assessment models, and the evaluation index includes：Assets year-by-year average investment amount, year inspection
Repair O＆M cost value, annual loss of outage value at cost, scrap cost of disposal value and annual electricity income volume；
Basic data acquisition module, for the economy parameter of the regional extent according to power distribution network to be assessed, load level,
Load character and dependability parameter, obtain the basic data of the corresponding power distribution network to be assessed of the evaluation index；
Index value computing module, for the expected service life of the power equipment according to power distribution network to be assessed and described
Basic data calculates the index value of each evaluation index；
Assessment of economic benefit module, for obtaining the power distribution network to be assessed according to the assessment models and each index value
Operation economic benefit.
Above-mentioned power distribution network operation grade appraisal procedure and system containing distributed energy, set up based on life cycle management
Power distribution network runs the index evaluation model of economic benefit, the evaluation index of assessment models is determined, according to power distribution network to be assessed
Regional extent relevant parameter, obtains the basic data of the corresponding power distribution network to be assessed of valency index item；According to power distribution network to be assessed
The expected service life and basic data of power equipment calculate the index value of each evaluation index；Finally according to assessment mould
Type and each index value obtain the operation economic benefit of power distribution network to be assessed；The technical scheme, with more science, evaluation process
Meet objective reality situation, efficiency high and accuracy height.
Brief description of the drawings
Fig. 1 is the power distribution network operation grade appraisal procedure flow chart containing distributed energy of the present invention；
Fig. 2 is a kind of power distribution network operation grade assessment system structural representation containing distributed energy of the present invention；
Fig. 3 is the line map of example of calculation；
Fig. 4 is index assessment models figure.
Embodiment
With reference to Fig. 1, Fig. 1 is the power distribution network operation grade appraisal procedure flow chart containing distributed energy of the present invention, bag
Include following steps：
Step (1)：The index evaluation model that the power distribution network based on life cycle management runs economic benefit is set up, it is determined that assessing
The evaluation index of model, the evaluation index includes：Assets year-by-year average investment amount, annual overhaul O＆M cost value,
Annual loss of outage value at cost, scrap cost of disposal value and annual electricity income volume；
Step (2)：According to the economy parameter of the regional extent of power distribution network to be assessed, load level, load character and
Dependability parameter, obtains the basic data of the corresponding power distribution network to be assessed of the evaluation index；
In one embodiment, the power distribution network basic data to be assessed can include：
1) training cost during power distribution network primary equipment purchase commodity, installation and debugging expense and power distribution network operation, examination take
With and special examination fees；
2) overhaul of power distribution network assets, repairing, maintenance repair and operation produced by labour cost, fee of material, price for repairing and
Capital operation wear and tear expense；
3) each equipment scale, such as transformer capacity in power distribution network, circuit model and length etc.；
4) load data and load year growth trend；
5) power distribution network number of work and average salary level；
6) reliability data, such as power supply reliability；
7) the average power purchase valency of power distribution network and sale of electricity valency；
8) 10kv voltage class power grid asset total value (initial value), global power grid asset total value (initial value)；10kv voltage class
Power network power transformation capacity, global power network power transformation capacity.
Step (3)：Calculated according to the expected service life of the power equipment of power distribution network to be assessed and the basic data
The index value of each evaluation index；
In one embodiment, it is worth to expected make by calculating being averaged for each primary equipment life-span in power distribution network to be assessed
With the life-span, calculation formula is as follows：
In formula, LavFor the expected service life of power equipment, N is the total of different type primary equipment in power distribution network to be assessed
Number, LkFor the expected service life of power distribution network kth class primary equipment to be assessed.
As embodiment, the process of the index value of each evaluation index is calculated in the step (3), including：
(a) electricity computation year income volume, annual electricity proceeds indicatior B refers to obtained in the operation process of power distribution network
Economic well-being of workers and staff, be primarily referred to as the profit of sale of electricity acquisition, its computational methods is as follows：
B=kj×(ps-pg)×Wzd-(pv-pg)Wpvc (2)
In formula, B refers to annual electricity income volume, k during the operation of power distribution networkjRepresent the affiliated j voltages of programme
Level Grid equipment is powered income amortization ratio；psRepresent sale of electricity valency；pgRepresent power purchase valency；WzdIncrease delivery etc. for grid company
Year is worth；pvFor photovoltaic rate for incorporation into the power network, according to current photovoltaic policy, if distributed energy grid-connect mode is the Yu electricity Shang that generates power for their own use
Net pattern, then pvCoal fired power generation mark post rate for incorporation into the power network is taken, if distributed energy grid-connect mode is online pattern in full, pvTake light
Volt online stake electrovalence in full；WpvcIt is worth for years such as photovoltaic electricity volumes.
Wherein, the WzdCalculation formula it is as follows：
The WpvcCalculation formula it is as follows：
In formula,Represent that the 1 year power distribution network supplies the maximum of load；Represent that the peak load of 1 year is sharp
Use hourage；ηpvGenerated power for their own use ratio for photovoltaic, generate power for their own use remaining electric online pattern, the corresponding η of online pattern in fullpvTake
Value is respectively 0 ＜ ηPV≤1、ηPV=0；WpvFor the annual electricity generating capacity of distributed energy；I represents social discount rate；N represents that project is transported
The row time；The coefficient being worth in year.
Each voltage class grid equipment income amortization ratio kjComputational methods continue to use current evaluation method, its calculation formula
And it is as follows：
In formula, BjRepresent that the affiliated j voltage class grid equipment of programme is powered income；BtRepresent that programme is powered
The global grid equipment of amount is powered income；AjRepresent correspondence j voltage class power grid asset total values (initial value)；AtRepresent global power network
Total assets (initial value)；SjRepresent correspondence j voltage class power network power transformation capacities；StRepresent global power network power transformation capacity.
(b) assets year-by-year average investment amount is calculated, assets year-by-year average investment CI is purchased comprising power distribution network primary equipment
The expense of putting, installation and debugging expense and other fees, its calculation formula are as follows：
In formula, CI is assets year-by-year average investment amount, V0Represent the initial disposable of all assets of power distribution network to be assessed
Gross investment, i represents social discount rate, and L represents the expected service life of primary equipment.
(c) overhaul O＆M cost value computation year, annual overhaul O＆M cost CMO refer to the overhaul of power distribution network assets, repairing,
Labour cost, fee of material, price for repairing and Capital operation wear and tear expense produced by maintenance repair and operation, include year operation inspection
Accomplish this CMO1, annual running wastage cost CMO2, its calculation formula is distinguished as follows：
CMO=CMO1+CMO2 (7)
Wherein, CMO is annual overhaul O＆M cost, includes annual operating maintenance cost CMO1, annual running wastage cost
CMO2；
CMO1=λ V0 (8)
In formula, λ is annual operating maintenance cost coefficient, and its value should consider the overhaul of power distribution network assets, repairing, daily
Labour cost, fee of material, price for repairing, Capital operation wear and tear expense and power distribution network number of work produced by maintenance and operation and average
Wage level etc.；ζ be local distribution network to be assessed synthesis line loss per unit, its value should consider regional economic development level,
Load level, voltage class and circuit model and length etc..
(d) loss of outage computation year value at cost, annual loss of outage cost CF is that the power supply enterprise caused by power failure throws
Loss in revenue is provided, the value of the expense is determined by power supply enterprise according to the investment return of oneself, can here with average power supply
The estimation of annual breakdown loss cost is carried out by rate ASAI, its calculation formula is as follows：
In formula, CF is annual loss of outage value at cost, and ASAI is the average power supply reliability of this area's power distribution network；
In formula, ASAI refer to total power supply hourage that the hour sum that do not have a power failure that user in 1 year is subjected to requires with user it
Than its calculation formula is as follows：
In formula, SAIDI represents the average power off time of system.
(e) calculate and scrap cost of disposal value, scrapping cost of disposal value (waiting year to be worth) CD can be using Approximate Equivalent as initial outlay
The a certain ratio of cost, its calculation formula is as follows：
In formula, CD represents to scrap cost of disposal value, ω represent be power distribution network component devices conversion factor of scrapping, power distribution network
Component devices include transformer's type, circuit class, Switch, switch cubicle kind equipment and scrap conversion factor.In view of remanent value of equipment
Generally higher than equipment Removal expense, shows as income, therefore formula carries negative sign.
Step (4)：The operation economy effect of the power distribution network to be assessed is obtained according to the assessment models and each index value
Benefit；
As embodiment, the operation economic benefit of power distribution network can be that the net annual value method based on life cycle management is calculated
, net annual value method is that the net cash flow of the different time points of each scheme is converted into the whole longevity equivalent with it by base earnings ratio
Single-candidate pays the method evaluated, compared again after sequence year value in the life cycle.The calculation formula of net annual value is：
The calculation formula of the operation economic benefit of the power distribution network is as follows：：
NVA=B- (CI+CMO+CF+CD) (14)
In formula, NVA is the economic benefit that power distribution network is runed；Power distribution network operation economic benefit according to obtained by above-mentioned calculating etc.
Year is worth, and can determine whether the traffic-operating period of power distribution network.If NVA>0, and reach bigger numerical, then power distribution network operation economic benefit is good
It is good；If NVA≤0, power distribution network operation deficiency in economic performance need to adjust investment operation strategy.
With reference to Fig. 2, Fig. 2 is a kind of power distribution network operation grade assessment system structural representation containing distributed energy of the present invention
Figure, including：
Assessment models build module, and the index evaluation of economic benefit is runed for setting up the power distribution network based on life cycle management
Model, determines the evaluation index of assessment models, and the evaluation index includes：Assets year-by-year average investment amount, year inspection
Repair O＆M cost value, annual loss of outage value at cost, scrap cost of disposal value and annual electricity income volume；
Basic data acquisition module, for the economy parameter of the regional extent according to power distribution network to be assessed, load level,
Load character and dependability parameter, obtain the basic data of the corresponding power distribution network to be assessed of the evaluation index；
Index value computing module, for the expected service life of the power equipment according to power distribution network to be assessed and described
Basic data calculates the index value of each evaluation index；
Assessment of economic benefit module, for obtaining the power distribution network to be assessed according to the assessment models and each index value
Operation economic benefit.
The power distribution network operation grade assessment system containing distributed energy of the present invention is with the present invention containing distributed energy
Power distribution network operation grade appraisal procedure correspond, in the above-mentioned power distribution network operation grade assessment side containing distributed energy
The technical characteristic and its advantage that the embodiment of method is illustrated are commented suitable for the power distribution network operation grade containing distributed energy
In the embodiment for estimating system, hereby give notice that.
The power distribution network operation grade appraisal procedure and system containing distributed energy of the present invention, set up based on week life-cycle
The power distribution network of phase runs the index evaluation model of economic benefit, the evaluation index of assessment models is determined, according to distribution to be assessed
The regional extent relevant parameter of net, obtains the basic data of the corresponding power distribution network to be assessed of valency index item；According to distribution to be assessed
The expected service life and basic data of the power equipment of net calculate the index value of each evaluation index；Finally according to commenting
Estimate model and each index value obtains the operation economic benefit of power distribution network to be assessed；The technical scheme, with more science, is assessed
Process meets objective reality situation, efficiency high and accuracy height.
In order to become apparent from the technique effect of technical scheme, an example of calculation of the invention set forth below,
By taking the achievements of a ruler line (704) of Foshan Tai'an transformer station as an example, while accessing distributed photovoltaic, its installed capacity in circuit downstream
For 2.1MW, grid-connect mode is generates power for their own use, remaining electricity online, wherein ratio of generating power for their own use is 0.5.The line map of achievements of a ruler line such as Fig. 3
Shown, Fig. 3 is the line map of example of calculation.
(1) set up and index evaluation model is obtained based on life cycle management, as shown in figure 4, Fig. 4 is index assessment models figure；
(2) according to situations such as the economic development of regional extent to be assessed, load level, load character, reliability level, receive
The power distribution network basic data to be assessed that collection evaluation index is related to is as follows：
(A) project overview of Tai'an transformer station achievements of a ruler line is as shown in table 1：
The project overview table of table 1
(B) power purchase valency, sale of electricity valency and photovoltaic rate for incorporation into the power network：
The purchase sale of electricity valence mumber evidence that this example is used in calculating is all from the project report of Foshan 13.Power purchase valency (containing tax) is adopted
With " notice of the National Development and Reform Commission on announcing each provincial power network sales rates of electricity in 2007 and T-D tariff standard ", (hair changes valency
[2008] No. 2920 texts of lattice) Guangdong Province's power network T-D tariff for announcing and sales rate of electricity standard calculated, power purchase valency (containing tax)
=sales rate of electricity-power network T＆Dprice.The Guangdong Province 674.36 yuan/MWh of sales rate of electricity in 2014, power purchase valency (contain tax) is
449.54 member/MWh.Coal fired power generation mark post rate for incorporation into the power network is with online stake electrovalence in full with reference to Guangdong Province's photovoltaic with reference to online electricity
Valency, takes 0.44954 yuan/kWh and 0.85 yuan/kWh respectively.
(C) load data：
Feeder line supplies load to be industrial type load in this example, using the average annual growth method of load, considers Foshan
Shuande regional economic development trend, construction land resource situation, and Load Development Trend etc., to the achievements of a ruler line of Tai'an transformer station
Load prediction is carried out, each planning level year transformer station maximum load is predicted.It is 4% to take load average growth rate per annum, and assumes the full longevity
Daily load characteristic keeps constant in the life cycle, i.e., the annual utilization hours of peak load keep constant.It is considered as feeder line simultaneously
The active upper limit supplied, the load data of achievements of a ruler line is as shown in table 2.
The loading data sheet of table 2
(D) power distribution network income amortization ratio：
By 10kV and following power distribution network income sharing ratio computing method, relevant rudimentary is obtained according to data is evaluated behind Foshan
Data, obtain 2009 to 2013 Foshan 10kV and following power distribution network income amortization ratio result, as shown in table 3.
- 2013 years 3 2009 years Foshan 110kV power distribution network income amortization ratios of table
According to 2009 to 2013 Foshan 10kV and the data of following power distribution network income amortization ratio, its average value is taken
45.50% as this example 10kV and following power distribution network income amortization ratio.
(E) reliability data：
This example carries out statistical analysis to the existing reliability statistics data in Foshan., Shunde District of Foshan City in 2015.Complete to supply
The kilowatt hour of electricity 160.4 hundred million, increases by 0.28% on a year-on-year basis；The kilowatt hour of electricity sales amount 155.04 hundred million is completed, increases by 1.59% on a year-on-year basis；User
During average power off time 1.35/family, fall 8.44% on a year-on-year basis；0.48 time/family of average frequency of power cut of user, medium-voltage line fault rate
2.27 times/hundred kilometers；Distribution can turn to supply rate 83.48%；During ten thousand yuan of fixed assets 23.74 megawatts of electricity sales amount.
(F) photovoltaic generation data：
The electricity generated power for their own use for distributed photovoltaic, using the actual operating data of the photo-voltaic power generation station of Foshan as
With reference to 2.1MW distributed photovoltaic annual electricity generating capacity is 2079.07MWh.
(3) the expected service life L of power distribution network is calculated, calculation formula is as follows：
Each evaluation index is calculated as follows：
(A) year's purchase index B：
B=kj×(ps-pg)×Wzd-(pv-pg)Wpvc
=0.455 × (674.36-449.54) × 37295.82- (449.54-449.54) × 1039.535 (ten thousand yuan)
=381.51 (ten thousand yuan)
(B) year-by-year average investment CI：
(C) annual overhaul O＆M cost CMO：
Foshan λ is taken as 1%, ζ and is taken as 3%, therefore CMO1、CMO2Be calculated as follows：
CMO1=λ V0=1% × 595.313=5.953 (ten thousand yuan)
CMO=CMO1+CMO2=5.953+50.30=56.253 (ten thousand yuan)
(D) annual loss of outage cost CF：
(E) cost of disposal CD is scrapped years：
(4) the operation economic benefit of the power distribution network is calculated：
NVA=B- (CI+CMO+CF+CD)
=381.51- (52.88+56.253+0.076-1.59)
=273.891 (ten thousand yuan)
It is computed, NVA is more than zero, and reaches larger numerical value, illustrates the feeder line in the case where accessing distributed power source
Run economic benefit good.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of power distribution network operation grade appraisal procedure containing distributed energy, it is characterised in that including：
(1) the index evaluation model that the power distribution network based on life cycle management runs economic benefit is set up, determines commenting for assessment models
Valency index item, the evaluation index includes：Assets year-by-year average investment amount, annual overhaul O＆M cost value, year have a power failure
Lose value at cost, scrap cost of disposal value and annual electricity income volume；
(2) joined according to the economy parameter of the regional extent of power distribution network to be assessed, load level, load character and reliability
Number, obtains the basic data of the corresponding power distribution network to be assessed of the evaluation index；
(3) each evaluation is calculated according to the expected service life of the power equipment of power distribution network to be assessed and the basic data to refer to
Mark the index value of item；
(4) the operation economic benefit of the power distribution network to be assessed is obtained according to the assessment models and each index value.
2. the power distribution network operation grade appraisal procedure according to claim 1 containing distributed energy, it is characterised in that institute
State expected service life in step (3) to be worth to by calculating each being averaged for primary equipment life-span in power distribution network to be assessed, calculate
Formula is as follows：
<mrow>
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<mi>L</mi>
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</mrow>
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<mo>=</mo>
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<mi>N</mi>
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<mo>&Sigma;</mo>
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</mrow>
<mi>N</mi>
</munderover>
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<mi>k</mi>
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</mrow>
In formula, LavFor the expected service life of power equipment, N is the sum of different type primary equipment in power distribution network to be assessed,
LkFor the expected service life of power distribution network kth class primary equipment to be assessed.
3. the power distribution network operation grade appraisal procedure according to claim 2 containing distributed energy, it is characterised in that institute
Stating each index value process of calculating in step (3) includes electricity income volume computation year, and its computational methods is as follows：
B=kj×(ps-pg)×Wzd-(pv-pg)Wpvc
In formula, B refers to annual electricity income volume, k during the operation of power distribution networkjRepresent the affiliated j voltage class electricity of programme
Net equipment is powered income amortization ratio；psRepresent sale of electricity valency；pgRepresent power purchase valency；WzdIncrease the years such as delivery value for grid company；pv
For photovoltaic rate for incorporation into the power network, according to current photovoltaic policy, if distributed energy grid-connect mode is remaining electric online pattern of generating power for their own use,
Then pvCoal fired power generation mark post rate for incorporation into the power network is taken, if distributed energy grid-connect mode is online pattern in full, pvTake photovoltaic it is in full on
Net stake electrovalence；WpvcIt is worth for years such as photovoltaic electricity volumes.
4. the power distribution network operation grade appraisal procedure according to claim 3 containing distributed energy, it is characterised in that institute
State WzdCalculation formula it is as follows：
<mrow>
<msub>
<mi>W</mi>
<mrow>
<mi>z</mi>
<mi>d</mi>
</mrow>
</msub>
<mo>=</mo>
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<mi>&Sigma;</mi>
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<mi>P</mi>
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<mfrac>
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<mi>i</mi>
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</mrow>
</msub>
</msup>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
</mrow>
The WpvcCalculation formula it is as follows：
<mrow>
<msub>
<mi>W</mi>
<mrow>
<mi>p</mi>
<mi>v</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>=</mo>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>n</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<msub>
<mi>L</mi>
<mrow>
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</munderover>
<mrow>
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<mo>-</mo>
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<mi>&eta;</mi>
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<mo>)</mo>
</mrow>
<msub>
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<mrow>
<mi>p</mi>
<mi>v</mi>
</mrow>
</msub>
<mo>&times;</mo>
<mfrac>
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In formula,Represent that the 1 year power distribution network supplies the maximum of load；Represent that the peak load of 1 year utilizes small
When number；ηpvGenerated power for their own use ratio for photovoltaic, generate power for their own use remaining electric online pattern, the corresponding η of online pattern in fullpvValue point
Wei not 0 ＜ ηPV≤1、ηPV=0；WpvFor the annual electricity generating capacity of distributed energy；I represents social discount rate；N represents project operation year
Part；The coefficient being worth in year.
5. the power distribution network operation grade appraisal procedure according to claim 4 containing distributed energy, it is characterised in that institute
Stating each index value process of calculating in step (3) includes calculating assets year-by-year average investment amount, and its calculation formula is as follows：
<mrow>
<mi>C</mi>
<mi>I</mi>
<mo>=</mo>
<msub>
<mi>V</mi>
<mn>0</mn>
</msub>
<mo>&times;</mo>
<mfrac>
<mrow>
<mi>i</mi>
<mo>&times;</mo>
<msup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mi>L</mi>
</msup>
</mrow>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mi>L</mi>
</msup>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
</mrow>
In formula, CI is assets year-by-year average investment amount, V0Represent initial disposable total throwing of all assets of power distribution network to be assessed
Money, i represents social discount rate, and L represents the expected service life of primary equipment.
6. the power distribution network operation grade appraisal procedure according to claim 5 containing distributed energy, it is characterised in that institute
State each index value process of calculating in step (3) and overhaul O＆M cost value including computation year, its calculation formula difference is as follows：
CMO=CMO1+CMO2
Wherein, CMO is annual overhaul O＆M cost, includes annual operating maintenance cost CMO1, annual running wastage cost CMO2；
CMO1=λ V0
<mrow>
<msub>
<mi>CMO</mi>
<mn>2</mn>
</msub>
<mo>=</mo>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>n</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>L</mi>
</munderover>
<mo>&lsqb;</mo>
<mi>&zeta;</mi>
<mo>&times;</mo>
<mrow>
<mo>(</mo>
<msubsup>
<mi>P</mi>
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<mi>D</mi>
<mi>m</mi>
<mi>a</mi>
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</mrow>
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</mrow>
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<mfrac>
<mrow>
<mi>i</mi>
<mo>&times;</mo>
<msup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mi>L</mi>
</msup>
</mrow>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<mi>L</mi>
</msup>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
<mo>&times;</mo>
<msub>
<mi>p</mi>
<mi>g</mi>
</msub>
</mrow>
In formula, λ is annual operating maintenance cost coefficient, and ζ is the synthesis line loss per unit of local distribution network to be assessed.
7. the power distribution network operation grade appraisal procedure according to claim 6 containing distributed energy, it is characterised in that institute
Stating each index value process of calculating in step (3) includes loss of outage value at cost computation year, and its calculation formula is as follows：
<mrow>
<mi>C</mi>
<mi>F</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mn>1</mn>
<mo>-</mo>
<mi>A</mi>
<mi>S</mi>
<mi>A</mi>
<mi>I</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>S</mi>
<mi>A</mi>
<mi>I</mi>
</mrow>
</mfrac>
<mo>&times;</mo>
<mi>B</mi>
</mrow>
In formula, CF is annual loss of outage value at cost, and ASAI is the average power supply reliability of this area's power distribution network.
8. the power distribution network operation grade appraisal procedure according to claim 7 containing distributed energy, it is characterised in that institute
State each index value process of calculating in step (3) and scrap cost of disposal value including calculating, its calculation formula is as follows：
<mrow>
<mi>C</mi>
<mi>D</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&omega;</mi>
<mo>&times;</mo>
<msub>
<mi>V</mi>
<mn>0</mn>
</msub>
<mo>&times;</mo>
<mfrac>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>L</mi>
<mrow>
<mi>a</mi>
<mi>v</mi>
</mrow>
</msub>
</msup>
<mi>i</mi>
</mrow>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>i</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>L</mi>
<mrow>
<mi>a</mi>
<mi>v</mi>
</mrow>
</msub>
</msup>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
</mrow>
In formula, CD represents to scrap cost of disposal value, and ω represents it is that power distribution network component devices scrap conversion factor.
9. the power distribution network operation grade appraisal procedure according to claim 8 containing distributed energy, it is characterised in that institute
Stating step (4) includes：
NVA=B- (CI+CMO+CF+CD)
In formula, NVA is the economic benefit that power distribution network is runed.
10. a kind of power distribution network operation grade assessment system containing distributed energy, it is characterised in that including：
Assessment models build module, and the index evaluation mould of economic benefit is runed for setting up the power distribution network based on life cycle management
Type, determines the evaluation index of assessment models, and the evaluation index includes：Assets year-by-year average investment amount, annual overhaul
O＆M cost value, annual loss of outage value at cost, scrap cost of disposal value and annual electricity income volume；
Basic data acquisition module, economy parameter, load level, load for the regional extent according to power distribution network to be assessed
Property and dependability parameter, obtain the basic data of the corresponding power distribution network to be assessed of the evaluation index；
Index value computing module, expected service life and the basis for the power equipment according to power distribution network to be assessed
Data calculate the index value of each evaluation index；
Assessment of economic benefit module, the fortune for obtaining the power distribution network to be assessed according to the assessment models and each index value
Seek economic benefit.
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| CN108537438A (en) * | 2018-04-08 | 2018-09-14 | 北京中电普华信息技术有限公司 | A kind of power grid operation Benefit Evaluation Method and device |
| CN111311048A (en) * | 2019-11-29 | 2020-06-19 | 国网甘肃省电力公司建设分公司 | Renewable energy power generation technology evaluation method considering LACE |
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| CN113536205A (en) * | 2021-07-09 | 2021-10-22 | 国电南瑞科技股份有限公司 | Low-voltage transformer area energy consumption optimization potential evaluation method and energy consumption optimization transformer area screening system |
| CN113536205B (en) * | 2021-07-09 | 2024-05-28 | 国电南瑞科技股份有限公司 | Energy optimizing potential evaluation method for low-voltage transformer area and energy optimizing transformer area screening system |
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