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Calculation method for sensing overvoltage of power distributing line based on PSCAD (power systems computer aided design)/EMTDC (electromagnetic transients including DC)

A technology of induced overvoltage and calculation method, applied in the electrical field, can solve problems such as complex numerical calculation methods, and achieve the effects of simple application, convenient lightning protection measures, and simple application

Inactive Publication Date: 2013-11-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Overcome the shortcomings of inaccurate empirical formulas and complex numerical calculation methods, and improve the efficiency of induced overvoltage analysis

Method used

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  • Calculation method for sensing overvoltage of power distributing line based on PSCAD (power systems computer aided design)/EMTDC (electromagnetic transients including DC)
  • Calculation method for sensing overvoltage of power distributing line based on PSCAD (power systems computer aided design)/EMTDC (electromagnetic transients including DC)
  • Calculation method for sensing overvoltage of power distributing line based on PSCAD (power systems computer aided design)/EMTDC (electromagnetic transients including DC)

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] The calculation method of distribution line induced overvoltage based on PSCAD / EMTDC mainly includes the following steps:

[0020] (1) Calculate the horizontal and vertical components of the electric field and the transverse magnetic field components generated by lightning strikes. The calculation method includes the following steps:

[0021] 1) The lightning channel is equivalent to the vertical channel connecting the cloud and the ground, and the lightning channel is divided into continuous dipoles, and the electromagnetic fields generated by each dipole are calculated separately, and the electromagnetic fields of each dipole are vector summed. Get the total electromagnetic field generated by the lightning channel current. The electric field calculation model derived by Master and Uman is used to calculate the horizontal component, vertical componen...

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Abstract

The invention relates to a calculation method for sensing overvoltage of a power distributing line based on PSCAD (power systems computer aided design) / EMTDC (electromagnetic transients including DC). The method mainly comprises the following steps of establishing a PSCAD / EMTDC circuit model of a power line sensing in a thunderbolt, designing a sensing overvoltage calculation self-definition element, and enclosing the PSCAD / EMTDC circuit model of the power line sensing in the thunderbolt and the sensing overvoltage self-definition element into a model in the PSCAD / EMTDC of the power line sensing in the thunderbolt. By adopting the calculation method, the model is established to more simply and conveniently calculate the sensing overvoltage of the power distributing line, and the analysis is carried out on the sensing overvoltage. According to the calculation method, the defects of an inaccurate experience formula and a complicate figure calculation method are overcome, and the efficiency of analyzing the sensing overvoltage is improved.

Description

technical field [0001] The invention belongs to the field of electrical technology, and in particular relates to a calculation method for induced overvoltage of distribution lines. Background technique [0002] The distribution network is an important link in the power system that is directly connected to users and distributes electric energy to users, and its safe and reliable operation is very important. Overhead power distribution lines are widely distributed and are extremely vulnerable to lightning strikes. Due to the low height of the towers and the greater shielding effect of the surrounding buildings, the probability of direct lightning strikes on the lines is small. important reason for the network. Therefore, the characteristics of induced overvoltage should be analyzed. [0003] At present, there are two main calculation methods for induced lightning overvoltage: the procedural method and the numerical calculation method. The procedure method uses empirical for...

Claims

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Application Information

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IPC IPC(8): G01R19/00
Inventor 陈继明朱明晓仉志华刘金亮林国华齐兰涛
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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