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A Static Safety Analysis Method Based on Latin Hypercube Sampling Probabilistic Power Flow

A static security analysis, Latin hypercube technology, applied to AC network circuits, single-network parallel feeding arrangements, wind power generation, etc., can solve problems such as long calculation time

Active Publication Date: 2021-05-28
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the Monte Carlo simulation method commonly used in probabilistic power flow calculations is generally not affected by the scale of the system and can obtain very high-precision results when the number of samples is large enough. Support, so the calculation time is too long to become the biggest shortcoming of the Monte Carlo simulation method

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  • A Static Safety Analysis Method Based on Latin Hypercube Sampling Probabilistic Power Flow
  • A Static Safety Analysis Method Based on Latin Hypercube Sampling Probabilistic Power Flow
  • A Static Safety Analysis Method Based on Latin Hypercube Sampling Probabilistic Power Flow

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] combine figure 1 , the present invention is based on the static security analysis method of Latin hypercube sampling probability flow, comprises the following steps:

[0014] Step 1: Sampling the random variables of wind farm forecast output to establish a sample matrix of wind power forecast output;

[0015] Step 2. According to the sample matrix of wind power forecast output established in step 1, the DC outage probability power flow calculation is performed, and the list of predicted accidents is obtained by using the predicted accident ranking index;

[0016] Step 3: According to the expected accident list obtained in step 2, use the comprehensive evaluation index to analyze one by one in order until five consecutive accidents no longer cause branch overload in the system.

[0017] In a preferred solution of the method of...

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Abstract

The invention discloses a static safety analysis method based on Latin hypercube sampling probability flow, which comprises the following steps: Step 1, sampling random variables of wind farm predicted output, and establishing a sample matrix of wind power predicted output; Step 2, according to step 1 The established sample matrix of wind power forecast output is used to calculate the probability flow of DC interruption, and the list of predicted accidents is obtained by using the ranking index of predicted accidents; step 3, according to the list of predicted accidents obtained in step 2, the comprehensive evaluation indicators are used to analyze one by one in order until Five consecutive accidents will no longer cause branch overload in the system. The present invention introduces the calculation method of probability flow based on Latin hypercube sampling into the static safety analysis of power system. The expected accident ranking index takes into account the distribution characteristics of branch flow probability flow, and the comprehensive evaluation index introduces the concept of entropy, which can fully reflect the impact of expected accidents on impact on the system.

Description

technical field [0001] The invention belongs to the technical field of static safety analysis of electric power systems, and in particular relates to a static safety analysis method of electric power systems based on Latin hypercube sampling probability flow. Background technique [0002] In recent years, wind power generation technology has become increasingly mature, and the development of wind power in my country has shown a trend of large-scale development. However, wind curtailment will occur in areas with excess wind resources, and the power generated by the wind farm at full capacity cannot be fully integrated into the grid. The output probability distribution presents an irregular distribution. However, with the access of large-scale wind power, a large number of uncertain factors have been brought to the power system. Therefore, it is necessary to conduct a static security analysis of the power system based on probabilistic power flow, which is conducive to the rea...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/386H02J2203/20Y02E10/76
Inventor 张俊芳王惟怡宋晓健王亚奇王健
Owner NANJING UNIV OF SCI & TECH
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