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An evaluation method for substation electrical main wiring adapting to different development stages of power grid

A development stage, main wiring technology, applied in data processing applications, instruments, information technology support systems, etc., and can solve problems such as increased calculation volume and long calculation time

Active Publication Date: 2017-02-01
STATE GRID CORP OF CHINA +2
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Problems solved by technology

Its main disadvantage is that the amount of calculation increases sharply with the increase of the system size.
Its main disadvantage lies in the close correlation between calculation time and calculation accuracy, that is to say, in order to obtain a high-precision reliability index, it often takes a long time to calculate, and it is not suitable for analyzing components with high reliability and mutual closely linked system

Method used

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  • An evaluation method for substation electrical main wiring adapting to different development stages of power grid
  • An evaluation method for substation electrical main wiring adapting to different development stages of power grid
  • An evaluation method for substation electrical main wiring adapting to different development stages of power grid

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Experimental program
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Embodiment

[0105] (1) Reliability assessment plan and assessment results

[0106]Carry out reliability assessment on the high-voltage electrical main wiring of four typical schemes, and its network topology is as follows: Figure 5 shown.

[0107] To analyze the reliability of the topological structure diagram of the main wiring network, firstly, the main wiring components are treated equivalently. Within the limits of equivalent components, any component failure will cause the power supply interruption of the branch circuit. Therefore, no matter the components within the limit Whether it is a series or parallel relationship, it is regarded as a series relationship within the limits of equivalent components. The reliability index of each equivalent component is shown in Table 1;

[0108] Table 1

[0109]

[0110]

[0111] In the table: λ eqR is the equivalent failure rate; μ eqR is the equivalent repair rate; MTTR eq is the equivalent failure repair time; MTTR eq =8760 / μ eq...

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Abstract

The invention provides a transformer substation main electrical connection assessment method suitable for different development stages of power grids and belongs to the technical field of power transmission and distribution operation and analysis. With the combination of the different development stages of the power grids, how to select transformer substation main connection schemes is studied in power grid planning and construction. On the basis of traditional transformer substation reliability assessment, the economic factor is considered, a transformer substation annual investment cost function is combined with a reliability model established through a minimal cut set method based on element state space, quantitative analysis and assessment are conducted under a unified frame structure, according to the different development stages of the 110 kV power grid and the 220 kV power grid, modeling is conducted in stages for main electrical connection, a large number of investigations and surveys are conducted, the reliability level and the economic efficiency level of a transformer substation are quantized, on the premise that main electrical connection reliability of the transformer substation is guaranteed, the optimal economic benefit of the transformer substation is obtained, and assistance is provided for operators and planners in the decision making and analyzing processes.

Description

technical field [0001] The invention belongs to the technical field of distribution network operation and analysis, and in particular relates to an evaluation method for electrical main wiring of a substation adapting to different development stages of a power grid. Background technique [0002] The main wiring of a substation is the most important energy transmission point in power generation, transmission and distribution equipment, and the reliability and economical evaluation of the main wiring of a substation has important engineering application significance. [0003] Electrical main wiring is a key component of power system network structure, and quantitative analysis of its reliability is an important field of power system reliability research. Currently, there are generally two methods commonly used in power system reliability calculations: one is the simulation method (Monte Carlo method), and the other is the analytical method. Among them, the analytical method c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 惠慧赵明欣崔艳妍刘伟
Owner STATE GRID CORP OF CHINA
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