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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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[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 substa
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[0041] Example one
[0042] A comprehensive evaluation method for 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 k-th smart substation design scheme, k=1, 2,...,m;
[0044] b. In the k-th smart substation design scheme, determine the one-time input cost C i And maintenance cost C m , The set of all transformers in the k-th smart substation is A, and the no-load loss of the a-th transformer in A is determined as P a0 And load loss is P ak And the load rate is ρ, the set of outgoing lines of the k-th smart substation is S, and the expected fault blocked electricity EENS of the outgoing line γ in S γ , Determine the electricity price σ of the area where the k-th smart substation is located, the equivalent electricity price of unplanned outages δ = 10σ, the annual interest rate i, the year j of capital investment and the full life cycle of the substation T...
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[0070] Example two
[0071] Take a 220kV smart substation design scheme as an example for comprehensive evaluation of safety, efficiency, and economy. The scheme is based on the typical design scheme 220-A-1 of the "State Grid Corporation 220kV Substation Typical Design Technical Guidelines" and adopts new equipment integration Isolate the circuit breaker. The specific design plan is as follows:
[0072] (1) Main transformer: 1 in the current period and 3 in the final period. 240MVA in the current period, and finally 3×240MVA, three-phase three-winding oil-immersed self-cooling high-impedance on-load tap-changing transformer, voltage class 220 / 110 / 10kV
[0073] (2) 220kV outlet: 1 time in this period, 6 times in the final period;
[0074] (3) 110kV outlet: 3 times in this period, 12 times in the final period;
[0075] (4) 10kV outlet: 9 times in this period, 24 times in the final period;
[0076] (5) Electrical main wiring: 220kV outlet in the current period 1 time, 6 times in the fin...
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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...
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