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Power grid project design-oriented SEC assessment model and analysis method

A technology of engineering design and evaluation model, which is applied in the direction of calculation, instrumentation, and data processing applications, etc. It can solve the problems of initial evaluation of power grid project design schemes and less research on project selection, and achieve effective design and implementation, and guidance for design and implementation. Effect

Inactive Publication Date: 2017-06-13
CONSTR BRANCH CHONGQING ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is little research on the initial evaluation and project selection of power grid project design schemes, and there is no guiding significance for realizing the optimal comparison and selection of single power grid project design schemes, that is, the realization of cost minimization

Method used

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  • Power grid project design-oriented SEC assessment model and analysis method
  • Power grid project design-oriented SEC assessment model and analysis method
  • Power grid project design-oriented SEC assessment model and analysis method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0062] Taking specific embodiment 1 as an example, the basic parameters are calculated:

[0063] (1) Basic social parameters

[0064] As the calculation base year, 2017 is selected, the social discount rate is 8%, and the average unit price of electricity sold by this unit is 0.86 yuan.

[0065] (2) Expected life of main equipment

[0066] The expected life of the main transformer equipment in the substation is 25 years, the expected life of the transmission line is 30 years, the expected life of the circuit breaker is 25 years, the expected life of the disconnector is 25 years, and the expected life of the busbar is 30 years.

[0067] (3) Transformer two-dimensional calibration coefficient kj

[0068] 220kV power transmission and transformation project, the transformer model is SFSZ-240000 / 220, and the corresponding two-dimensional benchmarking coefficient is selected as 3.1.

[0069] (4) The financial value coefficient kc under the same voltage level

[0070] For 220kV p...

Embodiment 2

[0129] Embodiment 2 is a power transmission line project, and the required line basic parameters for calculating the line project are as follows:

[0130] (1) Line unit length cost

[0131] Line model Investment cost (yuan / km) Remark JL / GIA-2×630 802900 Overhead 2500mm2 1230000 cable

[0132] (2) Annual operation and maintenance cost of the line

[0133]

[0134]

[0135] (3) The annual planned maintenance cost of the line

[0136] Maintenance labor cost (yuan / km year) Maintenance material cost (yuan / km) Mechanical cost (yuan / km) 2448 777.725 480.595

[0137] (4) Annual failure cost of line

[0138] Failure rate (times / year km) Disposal cost per fault (yuan / time km) 0.00121 2448

[0139] Embodiment 2 Line Engineering C Calculation

[0140] (1) Basic information of line engineering

[0141] content to direction A to B direction Voltage level (kV) 220 220 Equipment...

Embodiment 1、2

[0289] Take embodiment 1, 2 project as example, safety factor and efficiency factor calculation

[0290] (1) Safety factor

[0291]

[0292]

[0293] After the power grid project plan is put into operation, there will be no accidents every year, and the accident factor is taken as 1, so the safety factor is also 1.

[0294] (2) Efficacy factor

[0295]

[0296] The power supply reliability target is 99.96%, and after the implementation of the program, it will reach 99.89%, and the voltage qualification rate is 100%. According to the calculation formula in the third chapter, the efficiency factor fe is 0.908.

[0297] Step 5: Output of SEC results of power grid engineering projects.

[0298] SEC represents the unit capacity cost under the comprehensive consideration of safety, efficiency and quality; the basic formula of SEC calculation is as follows:

[0299] SEC = ∑ j (k j ×SEC j )×fE×fS

[0300]

[0301] Where: SEC j Represents classified annual safety e...

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Abstract

The invention discloses a power grid project assessment model building method, particularly, a power grid project design-oriented SEC assessment and analysis method. The method is characterized by comprising the steps of 1, collecting data and calculating basic parameters; 2, calculating a single project C of a power grid project; 3, performing power grid project SEC comprehensive assessment calculation including power transformation project SEC calculation and line project SEC calculation; 4, calculating a safety factor and an efficiency factor of the power grid project; 5, outputting a power grid project SEC result. Compared with the prior art, the method has the advantages that SEC quantitative assessment model indexes are provided in combination with actual conditions of the power grid project and toolization requirements, so that the indexes can be more suitable for use in the project, the characteristics of the power grid project are embodied, and values are closer to actual running.

Description

technical field [0001] The invention relates to a method for establishing a power grid engineering evaluation model, in particular to a SEC evaluation model and analysis method oriented to power grid engineering design. Background technique [0002] The construction of grid engineering projects, that is, the investment in grid equipment, is an important part of the grid company's fixed asset investment. Equipment investment should include all investments in the entire life cycle from equipment planning, purchase, use to scrapping. Whether the decision-making of power grid projects is correct or not is related to the cost of electric power enterprises, the efficiency of capital use and even the competitiveness and viability of enterprises in the market-oriented reform. However, the cost management of power grid equipment in our country has the problem that the management of the construction stage and the management of the operation stage are disconnected from each other. The...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q10/10G06Q50/06
CPCG06Q10/0637G06Q10/06393G06Q10/103G06Q50/06
Inventor 梁文举崔荣孙洪波周平温力力唐文左王国权周颖
Owner CONSTR BRANCH CHONGQING ELECTRIC POWER
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