A transient stability risk assessment method considering the uncertainty of new energy units

A transient stability and uncertainty technology, applied in resources, data processing applications, instruments, etc., can solve problems such as unsatisfactory calculations, and achieve the effect of speeding up calculations

Active Publication Date: 2019-03-08
NARI TECH CO LTD +2
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Problems solved by technology

However, the above method can only evaluate the static safety risk of the system. For the risk assessment of transient stability, it is necessary to determine the operation mode data and perform time-domain simulation. For example, the number of wind farms in the system is M, and the

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  • A transient stability risk assessment method considering the uncertainty of new energy units
  • A transient stability risk assessment method considering the uncertainty of new energy units
  • A transient stability risk assessment method considering the uncertainty of new energy units

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] A transient stability risk assessment method that considers the uncertainty of new energy units, generates expected faults based on the current operating state of the power grid and conducts transient stability assessments, and identifies the key transmission of transient stability corresponding to the fault based on the dominant complementary group of units provided by EEAC Section: The output interval probability of each new energy power plant is obtained from the short-term wind and light intensity prediction results, and on this basis, the probability flow calculation is performed to obtain the power interval and probability of key transmission sections; new energy sources are added in order of impact on safety and stability margins The generator set works and evaluates the severity of the fault, so that a relatively conservative operation risk in the power r...

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Abstract

The invention discloses a transient stability risk assessment method considering the uncertainty of a new energy unit, which generates a predicted fault based on the current operation state of a powernetwork and performs transient stability assessment, and identifies a transient stability key transmission section corresponding to the fault. According to the short-term wind and light intensity forecasting results, the output interval probabilities of each new energy power plant are obtained, and the power intervals and their probabilities of the key transmission sections are calculated by probabilistic tidal current calculation. In order to increase the output of new energy units and evaluate the severity of the fault, the section power interval operating risk is accumulated as a fault risk index. If the risk index of the fault is greater than the threshold value, the measures to reduce the output of the conventional unit shall be taken first under the premise of giving priority to ensure the output of the new energy power plant, and if the requirements are not met, the risk index shall be ensured to be less than the threshold value by limiting the output of the new energy power plant. The method of the invention can comprehensively reflect the operating conditions of the system and discover potential risks and fragile points in the system, thereby exerting the operating potential of the power grid.

Description

technical field [0001] The invention relates to a transient stability risk assessment method considering the uncertainty of new energy units, and belongs to the technical field of electric power system automation. Background technique [0002] The vigorous development of new clean energy such as wind power and photovoltaics can reduce greenhouse gas emissions and save fossil energy consumption. However, due to the uncertainty and intermittency of new energy output, its large-scale grid connection has brought huge challenges to the safe operation of the power grid. challenge. The risk assessment method considering the uncertainty of new energy output can fully reflect the operating conditions of the system, and discover potential risks and vulnerabilities in the system, and further develop the operating potential of the power grid through prevention and pre-control. [0003] At present, the short-term new energy power prediction method considering the timing characteristics ...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06Y02P90/82
Inventor 鲍颜红张金龙杨君军徐泰山刘韶峰王胜明刘强郑亮彭慧敏阮晶晶余璟张琦兵吴海伟
Owner NARI TECH CO LTD
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