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Distribution network reliability assessment method

A reliability and distribution network technology, applied in the field of distribution network reliability evaluation, can solve the problem that the actual load value cannot be accurately predicted, achieve the effect of accurate and comprehensive reliability evaluation, and improve the reliability level

Active Publication Date: 2017-10-24
南京软核科技有限公司
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Problems solved by technology

[0003] In the actual operating state, the actual value of the load cannot be accurately predicted. Occasional failures of operating equipment such as transformers and transmission lines, severe weather, etc. will lead to strong randomness in the operation of power system equipment

Method used

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Embodiment Construction

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0017] Such as figure 1 As shown, the purpose of the present invention is to provide a distribution network reliability assessment method, which calculates the reliability of the distribution network through component reliability modeling, load modeling, system state selection, system state analysis and reliability index calculation process , to effectively evaluate the reliability of the distribution network.

[0018] Component Reliability Modeling:

[0019] Such as figure 2 As shown, the reliability parameters are first input, and the input reliability parameters include: capacity matrix C=[c i ] 1×m , capacity probability matrix P=[p i ] 1×m and state transi...

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Abstract

The invention discloses a distribution network reliability assessment method. Through element reliability modeling, load modeling, system state selection, system state analysis, and reliability indexes, reliability of a distribution network is calculated, and reliability of the distribution network is effectively assessed. The method comprises: using an equivalent model of elements based on frequency and duration as foundation of element reliability modeling; using a bisection method clustering method to establish a load model, using a quick sort and clustering analysis method to establish a corresponding load model; using a state duration sampling method to determine element state and state duration time of elements or subsystems in given time, to obtain state and state duration time of a system, as system state selection; using an optimal load shedding model based on DC power flow as system sate analysis; reliability index comprehensive assessment including system severity index SI, system cut-down electricity quantity index BPECI calculation and parameter reliability sensitivity, and through a parameter perturbation method, finding an element which has high influence on system reliability.

Description

technical field [0001] The invention relates to the field of distribution network reliability, in particular to a distribution network reliability evaluation method. Background technique [0002] As a power transmission system directly facing users, the safe and stable operation of the distribution network is very important to the power grid and users. Comprehensive, fast and accurate reliability assessment is the prerequisite. In actual work, electric power science researchers introduce the operating factors and conditions of the power grid into the reliability index to provide assistance for the reliability assessment of the power grid. [0003] In the actual operating state, the actual value of the load cannot be accurately predicted, and the occasional faults of operating equipment such as transformers and transmission lines, severe weather, etc. will lead to strong randomness in the operation of power system equipment. Through the current efforts of power workers, the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 王朝明马春生
Owner 南京软核科技有限公司
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