CN109840614A - Transformer best equipment utilization rate control method based on overall life cycle cost - Google Patents
Transformer best equipment utilization rate control method based on overall life cycle cost Download PDFInfo
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Abstract
The present invention provides the transformer best equipment utilization rate control method based on overall life cycle cost, the specific steps are that: firstly, acquisition transformer basic parameter, transformer station high-voltage side bus cost data, being pumped into electricity price and four seasons typical day transformer load rate etc.；Secondly, establishing to minimize transformer year unit load cost as the power distribution network transformer best equipment utilization rate Optimized model of objective function；Then, the Optimized model is solved by MATLAB software；Finally, determining power distribution network transformer best equipment utilization value according to optimal solution.The invention proposes power distribution network transformer best equipment utilization rate control methods, can be obtained while meeting the transformer best equipment utilization value of safety and economy, with this method to instruct Distribution Network Equipment to make rational planning for.
Description
Technical field
The present invention relates to power distribution network transformer best equipment utilization rates to determine problem, in particular to a kind of based on week life-cycle
The power distribution network transformer best equipment utilization rate control method of period cost.
Background technique
Transformer equipment utilization rate is to reflect the important indicator of power grid construction economy, is the weight of power distribution network transformer planning
It will foundation.In recent years, people propose many methods, such as capacity factor measure to power distribution network transformer equipment utilization review index
And load factor, but on how to determine that the report of transformer best equipment utilization rate is rarely seen.
The present invention is based on the methods that overall life cycle cost determines transformer best equipment utilization rate, can be China's power distribution network
Technical innovation fund reasonable disposition provides guidance, has practical significance.
Summary of the invention
It is power distribution network transformer it is an object of the invention to solve the problems, such as how to determine the best equipment utilization rate of transformer
Operation and planning provide guidance.
The present invention proposes a kind of power distribution network transformer best equipment utilization rate control method based on overall life cycle cost,
The following steps are included:
(1) transformer basic parameter, transformer station high-voltage side bus cost data are acquired, is pumped into electricity price and four seasons typical day transformation
Device rate of load condensate etc.；
(2) it establishes to minimize transformer year unit load cost as the power distribution network transformer best equipment of objective function
Utilization rate Optimized model；
(3) Optimized model is solved by MATLAB software；
(4) power distribution network transformer best equipment utilization value is determined according to optimal solution.
A kind of power distribution network transformer best equipment utilization rate control method based on overall life cycle cost, it is special
Sign is, the utilization rate of equipment and installations refers to capacity factor measure, that is, evaluated transformer in statistical time (1 year) average load
Power accounts for the ratio of its rated power, and specific formula for calculation is as follows:
Wherein,For the transformer capacity factor；EloadFor transformer in measurement period (1 year) total load electricity；SN
For the rated capacity of transformer；T is measurement period, is herein 1 year.
Transformer basic parameter described in the step (1) includes transformer rated capacity, nominal load loss and zero load
Loss；The transformer station high-voltage side bus cost data include the initial gross investment of transformer, the operation and maintenance of transformer year cost of labor,
Repair of Transformer cost conversion factor, social discount rate, transformer expectation run the time limit, transformer scrap disposition conversion factor,
Transformer residual value conversion factor, transformer fault mean repair time, transformer fault rate, transformer region electricity production ratio,
Transformer region dynamoelectric benefit etc.；Typical case's day is one day arbitrarily chosen from a season.
Transformer year, unit load cost was defined as in the step (2), transformer overall life cycle cost convert to
The ratio of annual annual cost and year load total electricity, specific formula for calculation are as follows:
Wherein,For transformer year unit load cost；For transformer overall life cycle cost convert to
Annual annual cost；EloadTotal electricity is loaded for transformer year；For the year runing time of transformer；It is negative for transformer
Lotus stability bandwidth is defined as the ratio of load Yu the average load of transformer year of i moment transformer, reflects that the load of transformer is special
Property；AT、BT、CT、DTForCoefficient in Equivalent Calculation formula；PkIt is lost for the nominal load of transformer；MpriceFor every degree electricity
Wholesale enter electricity price；For the cost of labor of transformer year operation and maintenance；α is Repair of Transformer cost conversion factor；λscrap
Disposition conversion factor is scrapped for transformer；λresidualFor transformer residual value conversion factor；For transformer initial outlay conversion
Each year year cost of investment in life cycle management, shown in specific formula for calculation such as formula (3)；It is initially always thrown for transformer
Money；I is social discount rate；A is that transformer expectation runs the time limit；P0For the no-load loss of transformer；SNFor the specified appearance of transformer
Amount；For transformer fault mean repair time；For transformer fault rate；Ratio is produced electricity for transformer region；For transformer region dynamoelectric benefit.
Power distribution network transformer best equipment utilization rate Optimized model includes objective function and constraint item in the step (2)
Part:
The objective function are as follows:
The constraint condition are as follows:
Wherein, ηN-1For under guarantee " N-1 " criterion, the allowed capacity factor measure maximum value of transformer.
Compared with prior art, the beneficial effects of the present invention are:
(1) the best equipment utilization rate of transformer is effectively determined, while meeting transformer N-1 criterion and annual unit and bearing
Cost minimization is carried, provides foundation for the assessment of power distribution network transformer utilization efficiency and capacity planning.
(2) the power distribution network transformer best equipment utilization rate calculation method simple, intuitive proposed, is not related to iterating to calculate,
Calculating speed is fast.
Detailed description of the invention
Fig. 1 is a kind of power distribution network transformer best equipment utilization rate control method signal based on overall life cycle cost
Figure；
Fig. 2 is four seasons typical day transformer load rate curve graph
Specific embodiment
Specific implementation of the invention is described further below in conjunction with attached drawing and example.Obvious the embodiment described is this
Invention a part of the embodiment, instead of all the embodiments, if it is noted that below have not especially detailed description symbol or
Process is that those skilled in the art can refer to prior art understanding or realize.
If Fig. 1 is a kind of overall life cycle cost power distribution network transformer best equipment utilization rate provided in an embodiment of the present invention
Control method, comprising the following steps:
(1) transformer basic parameter, transformer station high-voltage side bus cost data are acquired, is pumped into electricity price and four seasons typical day transformation
Device rate of load condensate etc.；
Aforementioned four season, typical day transformer load rate was as shown in Figure 2.
(2) it establishes to minimize transformer year unit load cost as the power distribution network transformer best equipment of objective function
Utilization rate Optimized model；
Above-mentioned transformer year unit load cost is defined as, and transformer overall life cycle cost was converted to annual year
The ratio of cost and year load total electricity, shown in specific formula for calculation such as formula (1),
Wherein,For transformer year unit load cost；For transformer overall life cycle cost convert to
Annual annual cost；EloadTotal electricity is loaded for transformer year；For the year runing time of transformer；It is negative for transformer
Lotus stability bandwidth is defined as the ratio of load Yu the average load of transformer year of i moment transformer, reflects that the load of transformer is special
Property；AT、BT、CT、DTForCoefficient in Equivalent Calculation formula；PkIt is lost for the nominal load of transformer；MpriceFor every degree electricity
Wholesale enter electricity price；For the cost of labor of transformer year operation and maintenance；α is Repair of Transformer cost conversion factor；λscrap
Disposition conversion factor is scrapped for transformer；λresidualFor transformer residual value conversion factor；For transformer initial outlay conversion
Each year year cost of investment in life cycle management, shown in specific formula for calculation such as formula (3)；It is initially always thrown for transformer
Money；I is social discount rate；A is that transformer expectation runs the time limit；P0For the no-load loss of transformer；SNFor the specified appearance of transformer
Amount；For transformer fault mean repair time；For transformer fault rate；Ratio is produced electricity for transformer region；For transformer region dynamoelectric benefit.
Above equipment utilization rate refers to capacity factor measure, that is, evaluated transformer in statistical time (1 year) average load
Power accounts for the ratio of its rated power, and specific formula for calculation is as follows:
Above-mentioned power distribution network transformer best equipment utilization rate Optimized model includes objective function and constraint condition:
The objective function are as follows:
The constraint condition are as follows:
Wherein, ηN-1For under guarantee " N-1 " criterion, the allowed capacity factor measure maximum value of transformer.
(3) optimal solution of above-mentioned Optimized model is solved using fminbnd function in MATLAB software；
(4) power distribution network transformer best equipment utilization value is determined according to optimal solution.
It is an example of calculation of the method for the present invention below, is become with 20MW in certain substation using 2 station mutual contact modes
Simulation calculation is carried out for depressor, at this time under guarantee " N-1 " criterion, the allowed capacity factor measure maximum value η of transformerN-1For
75%.
(1) transformer basic parameter, transformer station high-voltage side bus cost data and as shown in table 1, the four season allusion quotations that are pumped into electricity price
Type daily load rate is as shown in Figure 2.
1 parameter list of table
(2) power distribution network transformer best equipment utilization rate Optimized model is calculated according to above-mentioned parameter, as follows:
The objective function:
The constraint condition are as follows:
It (3) the use of the optimal solution that fminbnd function solves above-mentioned Optimized model is 69.3% in MATLAB software；
(4) the power distribution network transformer best equipment utilization value is 69.3%.
In conclusion the present invention provides a kind of power distribution network transformer best equipment utilization rate based on overall life cycle cost
Control method, can determine the best equipment utilization rate of transformer by this programme, while meet transformer N-1 criterion and year list
Load cost minimization in position provides foundation for the assessment of power distribution network transformer utilization efficiency and capacity planning.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other it is any without departing under Spirit Essence and principle of the invention it is made modification, modification, substitution, combination, simplify,
It should be equivalent substitute mode, should all be included within protection scope of the present invention.
Claims (7)
1. the transformer best equipment utilization rate control method based on overall life cycle cost, it is characterised in that including following step
It is rapid:
(1) transformer basic parameter, transformer station high-voltage side bus cost data are acquired, is pumped into electricity price and four seasons typical day transformers are negative
Lotus rate；
(2) it establishes and is utilized using minimizing transformer year unit load cost as the power distribution network transformer best equipment of objective function
Rate Optimized model；
(3) Optimized model is solved by MATLAB software；
(4) power distribution network transformer best equipment utilization value is determined according to optimal solution.
2. the transformer best equipment utilization rate control method according to claim 1 based on overall life cycle cost,
Be characterized in that, utilization rate of equipment and installations refers to capacity factor measure, that is, evaluated transformer in statistical time (1 year) average load function
Rate accounts for the ratio of its rated power, and specific formula for calculation is as follows:
Wherein,For the transformer capacity factor；EloadFor transformer in measurement period total load electricity；SNFor the volume of transformer
Constant volume；T is measurement period.
3. the transformer best equipment utilization rate control method according to claim 2 based on overall life cycle cost,
It is characterized in that, the statistic period T is 1 year.
4. the transformer best equipment utilization rate control method according to claim 1 based on overall life cycle cost,
It is characterized in that, transformer basic parameter described in step (1) includes transformer rated capacity, nominal load loss and unloaded damage
Consumption；The transformer station high-voltage side bus cost data includes the initial gross investment of transformer, the cost of labor of transformer year operation and maintenance, change
Depressor cost of overhaul conversion factor, social discount rate, transformer expectation runs the time limit, transformer scraps disposition conversion factor, becomes
Depressor residual value conversion factor, transformer fault rate, transformer region electricity production ratio, becomes transformer fault mean repair time
Depressor region dynamoelectric benefit.
5. the transformer best equipment utilization rate control method according to claim 1 based on overall life cycle cost,
It is characterized in that, typical case described in step (1) is one day arbitrarily chosen from a season day.
6. the transformer best equipment utilization rate control method according to claim 1 based on overall life cycle cost,
It is characterized in that, annual unit load cost is defined as in the step (2), and transformer overall life cycle cost is converted to annual
The ratio of annual cost and year load total electricity, specific formula for calculation are as follows:
Wherein,For transformer year unit load cost；It converts for transformer overall life cycle cost to annual
Annual cost；EloadTotal electricity is loaded for transformer year；For the year runing time of transformer；For transformer load fluctuation
Rate is defined as the ratio of load Yu the average load of transformer year of i moment transformer, reflects the load characteristic of transformer；AT、
BT、CT、DTForCoefficient in Equivalent Calculation formula；PkIt is lost for the nominal load of transformer；MpriceWholesale for every degree electricity enters
Electricity price；For the cost of labor of transformer year operation and maintenance；α is Repair of Transformer cost conversion factor；λscrapFor transformation
Device scraps disposition conversion factor；λresidualFor transformer residual value conversion factor；For transformer initial outlay conversion to full longevity
Each year in period year cost of investment is ordered, shown in specific formula for calculation such as formula (3)；For the initial gross investment of transformer；I is
Social discount rate；A is that transformer expectation runs the time limit；P0For the no-load loss of transformer；SNFor the rated capacity of transformer；For transformer fault mean repair time；For transformer fault rate；Ratio is produced electricity for transformer region；For transformer region dynamoelectric benefit.
7. the transformer best equipment utilization rate control method according to claim 1 based on overall life cycle cost,
It is characterized in that, power distribution network transformer best equipment utilization rate Optimized model includes objective function and constraint item in the step (2)
Part:
The objective function are as follows:
The constraint condition are as follows:
Wherein, ηN-1For under guarantee " N-1 " criterion, the allowed capacity factor measure maximum value of transformer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111260152A (en) * | 2020-02-13 | 2020-06-09 | 长沙理工大学 | Optimized type selection method for distribution transformer |
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| CN105426979A (en) * | 2014-09-12 | 2016-03-23 | 国家电网公司 | Optimizing method for operation cost of transformer |
| CN107145707A (en) * | 2017-04-01 | 2017-09-08 | 三峡大学 | It is a kind of to count and photovoltaic is exerted oneself the power distribution network transformer planing method of uncertain and overall life cycle cost |
| CN107918817A (en) * | 2016-10-11 | 2018-04-17 | 华北电力大学 | A kind of Distribution Network Equipment utilization rate comprehensive assessment index system counted and distributed generation resource accesses |
| CN108764519A (en) * | 2018-04-11 | 2018-11-06 | 华南理工大学 | A kind of garden energy internet energy device capacity configuration optimizing method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426979A (en) * | 2014-09-12 | 2016-03-23 | 国家电网公司 | Optimizing method for operation cost of transformer |
| CN107918817A (en) * | 2016-10-11 | 2018-04-17 | 华北电力大学 | A kind of Distribution Network Equipment utilization rate comprehensive assessment index system counted and distributed generation resource accesses |
| CN107145707A (en) * | 2017-04-01 | 2017-09-08 | 三峡大学 | It is a kind of to count and photovoltaic is exerted oneself the power distribution network transformer planing method of uncertain and overall life cycle cost |
| CN108764519A (en) * | 2018-04-11 | 2018-11-06 | 华南理工大学 | A kind of garden energy internet energy device capacity configuration optimizing method |
Cited By (2)
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| CN111260152A (en) * | 2020-02-13 | 2020-06-09 | 长沙理工大学 | Optimized type selection method for distribution transformer |
| CN111260152B (en) * | 2020-02-13 | 2021-09-07 | 长沙理工大学 | Optimized type selection method for distribution transformer |
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