Method for appraising voltage stability in case of large disturbance probability

A technology of voltage stability and interference probability, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as complex calculation models, and achieve the effect of reducing voltage collapse accidents

Inactive Publication Date: 2009-06-03
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

[0004] However, due to the complexity of the power grid reliability calculation model, the application scope of these probabilistic evaluation methods is mainly limited to the fields of planning scheme comparison and distribution network evaluation. Countries still use deterministic methods such as the N-1 criterion almost without exception

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  • Method for appraising voltage stability in case of large disturbance probability
  • Method for appraising voltage stability in case of large disturbance probability
  • Method for appraising voltage stability in case of large disturbance probability

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Embodiment Construction

[0064] The voltage stability assessment with high disturbance probability belongs to the category of reliability assessment. Power system reliability is a measure of the power system's ability to supply power and energy to power users uninterruptedly according to acceptable quality standards and required quantities. It includes two aspects of adequacy and safety. Sufficiency is also called static reliability, that is, under static conditions, the ability of the power system to meet the needs of users for power and electric energy; security is also called dynamic reliability, that is, under dynamic conditions, the power system withstands sudden disturbances (power The system can withstand large disturbances) and provide power and energy to users without interruption. The invention mainly relates to the dynamic reliability evaluation problem of voltage stability, that is, the definition of voltage stability with high interference probability, and the proposal and establishment ...

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Abstract

Based on the definition and classification of the power system stability both at home and abroad in combination with an appraisal procedure of the power system reliability, the invention provides a concept of voltage stability in case of large disturbance probability, based on the concept a reliability index of voltage stability in case of large disturbance probability is established, the reliability index can comprehensively take into account temporary and long-term voltage stability, and a comprehensive evaluation principle of probability voltage stability is formulated. Based on the reliability index and the comprehensive evaluation principle, a method for appraising voltage stability in case of large disturbance probability based on power system reliability appraisal is invented, and an applied algorithm process for the probability voltage stability appraisal established by the method can provide a quantitative appraisal result on the security feature of the system voltage stability.

Description

technical field [0001] The invention relates to a simulation and calculation of a power system, in particular to a method for evaluating voltage stability with a large disturbance probability based on the reliability evaluation of the power system. Background technique [0002] The increasingly serious development trend of today's environmental problems and energy crisis poses an unavoidable challenge to the sustainable development of the global power industry, thus prompting countries around the world to generally accelerate the research and development of new technologies and new technologies in the field of power to meet this new challenge. methods, including probabilistic power system reliability assessment methods. [0003] Historically, because the power generation system can be simulated with a simple single node, the probability-based reliability assessment method has been used in some countries in the 1950s and 1960s, and now many countries have carried out related ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H02J3/00
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 马世英孙华东丁剑宋云亭
Owner CHINA ELECTRIC POWER RES INST
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