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A Method for Economic Evaluation of Power System Differentiation Planning

A planning economy and differentiated technology, applied in data processing applications, instruments, calculations, etc., can solve the problem of insufficient consideration of long-term grid planning and time factors of funds, incomplete economic evaluation, and insufficient consideration of special operation modes, etc. question

Active Publication Date: 2015-09-16
WUHAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that it only pays attention to the one-time cost and local benefits of grid investment, and does not take into account the long-term and capital time factors of grid planning.
This method overcomes the shortcomings of ignoring long-term costs and focusing on short-term investment in the current economic evaluation of power systems, but it is only applicable to conventional economic evaluation of power grid planning, and does not take into account the special operation mode in disaster scenarios after differentiated planning of power grids.
[0006] Considering the particularity of the power grid after differentiated planning, the economic evaluation method of conventional power grid planning is not fully applicable to the economic evaluation of the power grid after differentiated planning

Method used

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  • A Method for Economic Evaluation of Power System Differentiation Planning
  • A Method for Economic Evaluation of Power System Differentiation Planning
  • A Method for Economic Evaluation of Power System Differentiation Planning

Examples

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Embodiment 1

[0078] An economic evaluation method for differentiated planning of a power system, which conducts economic evaluation at the equipment level (single unit) to Figure 4 Take the Garver6 node calculation model as an example. Include the following steps;

[0079] Step 1. Determine the core backbone grid; clarify the operation mode in the disaster scenario after the differentiated planning of the power grid. In the disaster scenario, the grid structure is composed of differentiated lines, that is, only the core backbone grid is left for stable operation;

[0080] Mainly considering the impact of ice and snow disasters, it is determined that the important lines in the example model are 3-5, 2-6, and 4-6, all of which are new differentiated lines, and the lengths are 20km, 30km, and 30km respectively. The once-in-a-year ice disaster is raised to resist the ice disaster that occurs once in 50 years or once in a century. The disaster scenario is that when an ice disaster exceeds the...

Embodiment 2

[0147] An economic evaluation method for differentiated planning of a power system, which conducts system-level (multi-equipment) economic evaluation to Figure 4 Take the Garver 6-node calculation model as an example.

[0148] Carry out differentiated planning for three important lines at the same time, the typical scheme is as follows, Figure 6 (a), (b), (c), and (d) correspond to schemes (1), (2), (3), and (4) respectively:

[0149] Scheme (1) The design standards of the three lines are all raised to resist the ice disaster that occurs once in 50 years.

[0150] Scheme (2) The design standards of lines 3-5 and 2-6 are raised to resist ice disasters once in 50 years, and lines 4-6 are raised to resist ice disasters once in 100 years.

[0151] Scheme (3) The design standards of lines 3-5 and 2-6 are raised to resist ice disasters once in 100 years, and lines 4-6 are raised to resist ice disasters once in 50 years.

[0152] Scheme (4) The line design standards are all raised...

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Abstract

The invention discloses a method for evaluating economy of for differential planning of an electric system. Based on principles and requirements on differential planning of a large power grid, a life cycle cost theory is combined with a 'with and without comparison' theory in disaster economics, a set of differential life cycle cost-effectiveness economy evaluation system is provided; increased cost, reduced benefit, disaster happening time and probability are comprehensively considered, three economy evaluation indexes about accumulated increased cost, expected net benefit and benefit cost are provided; difference between service lives and operation time of different equipment is comprehensively considered, and via determining a unified time period, economy evaluation from equipment level (unit piece) to a system level (multiunit pieces) for the differential planning is realized. The method for evaluating the economy of for the differential planning of the electric system has important instructing significance for selection of reinforcing equipment, determination of design standards and comparison and selection of an optimum differential planning scheme in the differential planning of the power grid.

Description

technical field [0001] The invention belongs to the field of differentiated planning of electric power systems, and in particular relates to an economic evaluation method of differentiated planning of electric power systems. Background technique [0002] Due to the different factors such as geographical location and external meteorological conditions of different lines, the degree of strength required to face natural disasters is also different. The differentiated planning of the power grid is to carry out differentiated designs for different lines and different sections, transform important lines or improve design standards, and form the smallest core backbone grid that can ensure continuous power supply for important loads when major natural disasters occur. [0003] In recent years, extreme natural disasters have led to frequent occurrences of events that affect the safe operation of power grids and normal power supply, causing huge economic losses and serious social impa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06
Inventor 刘涤尘吴军宋春丽董飞飞赵一婕潘旭东王浩磊
Owner WUHAN UNIV
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