A power distribution network power failure risk assessment method and system

A technology of risk assessment and risk assessment model, which is applied in the field of distribution network outage risk assessment method and system, can solve the problem that the risk assessment of distribution network cannot fully reflect the risk level of distribution network with distributed power generation

Pending Publication Date: 2019-06-25
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In this situation, the traditional distribution network risk assessment cannot fu

Method used

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  • A power distribution network power failure risk assessment method and system
  • A power distribution network power failure risk assessment method and system
  • A power distribution network power failure risk assessment method and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0120] Embodiment 1. The present invention proposes a method for assessing the risk of a power outage in a distribution network, such as figure 1 shown.

[0121] A method for assessing the risk of a power outage in a distribution network, comprising:

[0122] Collect distribution network outage information;

[0123] Bringing the distribution network outage information into the pre-established distribution network outage risk assessment model to calculate the outage risk;

[0124] The pre-established distribution network outage risk assessment model includes: a distribution network state variable sampling model and an evaluation index.

Embodiment 2

[0125] Embodiment 2, as figure 2 shown.

[0126] (1) The DG outage model described in step 1 is based on the traditional distribution network component outage model, and further considers the unique factors that cause DG outage to obtain a comprehensive outage model.

[0127] The outage of the distributed power inverter is equivalent to the outage model of the components in the traditional distribution network:

[0128] Repairable Forced Failure Probability

[0129] Firstly, the outage frequency and repair time of components are counted, and the repairable forced failure can be simulated through the steady-state "run-stop-run" cycle process. image 3 and Figure 4 They are cycle process diagram and state transition diagram respectively. The mathematical form of the average unavailability rate in the long-term circulation process can be expressed by formula (1):

[0130]

[0131] In the formula: λ is the failure rate (failure times / year); μ is the repair rate (repair t...

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Abstract

The invention provides a power distribution network power failure risk assessment method and system. The method comprises the steps of collecting power distribution network outage information; Substituting the power distribution network outage information into a pre-established power distribution network outage risk assessment model, and calculating outage risks; Wherein the pre-established powerdistribution network power failure risk assessment model comprises a power distribution network state variable sampling model and an assessment index. According to the technical scheme provided by theinvention, the outage model of each element is established, the risk assessment quantification index is clear, and the power failure risk level of the power distribution network containing the distributed power supply is assessed more accurately and comprehensively.

Description

technical field [0001] The invention belongs to the field of electric power systems and automation thereof, and in particular relates to a method and system for assessing a power failure risk of a distribution network. Background technique [0002] A large number of distributed power sources have changed the structure and trend of the distribution network, and the traditional radial distribution network has become a multi-power system. Considering the randomness of distributed power generation, the risk factors and risk level of distribution network change, risk assessment becomes more important. [0003] In this situation, the traditional distribution network risk assessment cannot fully reflect the risk level of the distribution network containing distributed generation. [0004] Therefore, it is necessary to propose a method and device for evaluating the risk of a power outage in a distribution network to solve the above problems. Contents of the invention [0005] Ai...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G06F17/16
Inventor 张瑜宋晓辉盛万兴马静邓卓俊
Owner CHINA ELECTRIC POWER RES INST
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