Probability dynamic safety assessment method in account of wind power

A security and probabilistic technology, applied in the field of probabilistic dynamic security assessment considering wind power, can solve problems such as increasing system uncertainty and difficulty in ensuring rapid assessment

Inactive Publication Date: 2017-06-30
TIANJIN UNIV
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Problems solved by technology

However, the large-scale grid-connection of wind power increases the uncertainty of the system and brings more uncertain factors. The limitations of the traditional deterministic security situation assessment are becoming increasingly prominent. Probabilistic security assessment is a deterministic security An important supplement to the assessment, playing a more important role
[0004] For the probabilistic dynamic safety assessment of wind power, the existing results generally

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  • Probability dynamic safety assessment method in account of wind power
  • Probability dynamic safety assessment method in account of wind power
  • Probability dynamic safety assessment method in account of wind power

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Embodiment Construction

[0036] The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The description is only to illustrate the present invention, and is not intended to limit the present invention.

[0037] like figure 2 As shown, a probabilistic dynamic safety assessment method considering wind power proposed by the present invention mainly includes: Probabilistic modeling of uncertain factors affecting the safety level of the power system, that is, probabilistic modeling of wind power and load node injection power and model the component failure probability; construct the system dynamic safety probability evaluation index, and obtain the analytical expression of the system dynamic safety probability PDS; solve the system dynamic safety probability based on the analysis of the safety domain, that is, calculate offline for all faults in the expected accident set including wind power The hyper...

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Abstract

The invention discloses a probability dynamic safety assessment method in account of wind power. The method mainly comprises the steps: conducting probabilistic modeling of the uncertain factors which affect the power system safety level, particularly, conducting the probabilistic modeling of the wind power and load node injection power, and conducting modeling of the component failure probability; constructing the system dynamic safety probability assessment index, and obtaining a parsing expression of the system dynamic safety probability PDS; offline calculating the system dynamic safety probability based on the safety domain parsing, particularly, calculating the hyperplane coefficient of a dynamic safety domain containing the wind power for all failures of an expected accident set, and parsing and calculating the system dynamic safety probability according to a probability model of the component failure and the parsing expression of the system dynamic safety probability and based on the dynamic safety domain containing the wind power of the hyperplane format and the Cornish-Fisher series. The method can be applied to the monitoring and control of power system safety, the comparison of planning scheme, the optimization of operation and the like.

Description

technical field [0001] The invention belongs to the field of grid operation planning, and in particular relates to a probabilistic dynamic security evaluation method considering wind power. Background technique [0002] In order to coordinate the relationship between economy, energy and ecological environment to achieve sustainable development, all countries in the world have jointly chosen to develop renewable energy. Renewable energy represented by wind power has been connected to the grid on a large scale, but it is greatly affected by the weather, it is difficult to achieve accurate forecasting, and it has the characteristics of volatility and intermittency, which can undergo large changes in a short period of time. When the rate is high, the uncertainty of node injection is greatly increased, which has a non-negligible impact on the safe and stable operation of the power grid. [0003] For a long time, deterministic security assessment has dominated the dispatch contro...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/06
CPCG06Q50/06G06F30/20Y02E40/70Y04S10/50
Inventor 刘艳丽余贻鑫
Owner TIANJIN UNIV
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