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Intelligent substation design scheme comprehensive assessment method

A technology of intelligent substation and design scheme, applied in the field of power system, can solve the problem of low credibility of evaluation results, and achieve the effect of scientific evaluation results and comprehensive evaluation of safety

Inactive Publication Date: 2017-03-29
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current evaluation of smart substation design schemes lacks possible accidents in substations, losses caused by accidents, operating costs in the entire life cycle of substations, and indicators of safety and efficiency. Therefore, the existing evaluation methods have certain limitations. reliability, the reliability of the evaluation results is not high

Method used

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  • Intelligent substation design scheme comprehensive assessment method
  • Intelligent substation design scheme comprehensive assessment method
  • Intelligent substation design scheme comprehensive assessment method

Examples

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Embodiment 1

[0042] A comprehensive evaluation method for a smart substation design scheme, the method includes the following steps:

[0043] a. Determine the m smart substation design schemes participating in the evaluation, and select the kth smart substation design scheme, k=1, 2, ..., m;

[0044] b. In the kth smart substation design scheme, determine the one-time input cost C i and maintenance cost C m , the set of all transformers in the kth smart substation is A, and the no-load loss of the ath transformer in A is determined to be P a0 and the load loss is P ak and the load rate ρ, the outgoing line set of the kth smart substation is S, and the expected fault-blocked electric quantity EENS of the γth outgoing line in S is determined γ , determine the electricity price σ in the area where the kth smart substation is located, the equivalent electricity price of unplanned power outages δ=10σ, the annual interest rate i, the year of capital investment j and the whole life cycle of th...

Embodiment 2

[0071] Taking the design scheme of a 220kV smart substation as an example to conduct a comprehensive evaluation of safety, efficiency and economy. Isolate the circuit breaker. The specific design scheme is as follows:

[0072] (1) Main transformer: 1 in the current phase and 3 in the final phase. 240MVA in this phase, 3×240MVA in the end, three-phase three-winding oil-immersed self-cooling high-impedance on-load tap-changing transformer, the voltage level is 220 / 110 / 10kV;

[0073] (2) 220kV outgoing line: 1 round in this period, 6 rounds in the final period;

[0074] (3) 110kV outgoing line: 3 times in this period, 12 times in the final period;

[0075] (4) 10kV outgoing line: 9 times in this period, 24 times in the final period;

[0076] (5) Electrical main wiring: 220kV outgoing line 1 time in the current period, 6 times in the final period, 220kV electrical main wiring terminal, this period adopts double busbar wiring; 110kV outgoing line 3 times in the current period, ...

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Abstract

The invention discloses an intelligent substation design scheme comprehensive assessment method, and relates to the field of an intelligent substation design scheme comprehensive assessment method. The method comprises the following steps: determining parameters in a safety effectiveness cost evaluation index model from intelligent substation design schemes; determining distribution of random variables in the model; determining weight of each cost index through a fuzzy analytical hierarchy process, and carrying out normalization processing; and calculating safety effectiveness cost evaluation index values through a Monte Carlo method, and selecting the intelligent substation design scheme corresponding to the minimum safety effectiveness cost evaluation index value as an optimal scheme. The method takes overall considerations of factors of safety, effectiveness and cost in the early design stage of an intelligent substation, solves the problem of incomprehensive consideration in the past scheme evaluation, can carry out scientific and reasonable evaluation on comprehensive attributes of the intelligent substation, provides reference for planning and construction of the intelligent substation, and is suitable for actual engineering application.

Description

technical field [0001] The invention relates to an electric power system, and more specifically relates to a comprehensive evaluation method for an intelligent substation design scheme. Background technique [0002] Smart substation is a complex system engineering, which is the inheritance and breakthrough of the existing smart substation. In the construction of smart substations, the selection of smart substation design schemes is the basis for building smart substations. An appropriate design scheme can not only effectively save various costs such as construction, operation and maintenance, and faults, but also improve the reliability of smart substation operation and reduce accidents. [0003] The current evaluation of smart substation design schemes lacks possible accidents in substations, losses caused by accidents, operating costs in the entire life cycle of substations, and indicators of safety and efficiency. Therefore, the existing evaluation methods have certain l...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06
Inventor 张籍杜治蔡勇谢东肖智宏韩柳杨东俊颜炯陈峰江寿霞康巧萍刘洋谢瀚阳陈艳波
Owner STATE GRID CORP OF CHINA
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