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Power distribution network voltage safety evaluation method based on conditional risk value model

A conditional value-at-risk, distribution network technology, applied in the field of distribution networks, can solve problems such as voltage fluctuations and distribution network security risks

Inactive Publication Date: 2020-08-04
吉林科创电力有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the context of new energy, the uncertainty of distributed power generation and electric vehicles will cause voltage fluctuations, which will also bring risks to the security of the distribution network

Method used

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  • Power distribution network voltage safety evaluation method based on conditional risk value model
  • Power distribution network voltage safety evaluation method based on conditional risk value model
  • Power distribution network voltage safety evaluation method based on conditional risk value model

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Embodiment Construction

[0081] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0082] refer to figure 1 ,like figure 1 As shown, a distribution network voltage security assessment method based on the conditional value-at-risk model includes the following steps:

[0083] S1, Calculation of conditional VaR. Set up a portfolio strategy X and the risk measure in the strategy ρ ( X ) (the risk measure here ρ ( X ) is the parameter of the model in the risk management method, but its calculation process is very complicated, so I want to simplify the calculation and construct a special function F α ( x，β ), which is conceptually equivalent to the special function F α ...

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Abstract

The invention discloses a power distribution network voltage safety evaluation method based on a conditional risk value model, and relates to the power distribution network technology, and the methodcomprises the following steps: S1, calculating a conditional risk value; s2, performing risk analysis on the risk value of the voltage fluctuation condition; s3, carrying out risk index analysis of the voltage fluctuation condition risk value; and S4, respectively calculating estimated values of the special functions of the power generation power of the distributed power supply and the charging and discharging power of the electric vehicle, and further calculating voltage risks and power distribution network operation voltage risk indexes. According to the method, the risk value of the condition risk value model of the voltage safety is calculated under two conditions of normal operation of a power distribution network system and an expected fault line, and the feasibility and applicability of the model are verified.

Description

technical field [0001] The invention relates to distribution network technology, in particular to a distribution network voltage security evaluation method based on a conditional value-at-risk model. Background technique [0002] At present, as distributed energy sources such as distributed power generation, distributed energy storage, and controllable loads are connected to the distribution network, the side load and power structure of the distribution network have undergone profound changes, and the concept of the distribution network has also undergone a change from the traditional Changes from power grid, smart distribution network, active distribution network to active distribution system. For the power grid, the access of DG makes the power flow within the distribution network and between the transmission and distribution networks change from one-way to two-way; users are intermittent, and have dual identities of power generation and power consumption, two-way, interac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q10/06393G06Q50/06
Inventor 孙亮崔金栋关山田洪亮宋伟杰张敏全
Owner 吉林科创电力有限公司