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A method for calculating corona ion flow field of high-voltage direct-current transmission line under smog condition

A high-voltage direct current, transmission line technology, applied in calculation, electrical digital data processing, design optimization/simulation, etc., can solve the problems of complex calculation and large quantity of ion flow field

Pending Publication Date: 2018-12-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

However, due to frequent haze weather in recent years, new complex weather conditions have brought new challenges to DC transmission projects. In haze weather, there are a large number of suspended fog droplets and suspended particles in the air. It is full of charged ions, and the suspended particles in the smog will absorb charged ions to form new charged particles, which cannot be ignored because of the large number, which makes the calculation of ion flow field more complicated

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  • A method for calculating corona ion flow field of high-voltage direct-current transmission line under smog condition
  • A method for calculating corona ion flow field of high-voltage direct-current transmission line under smog condition
  • A method for calculating corona ion flow field of high-voltage direct-current transmission line under smog condition

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Embodiment Construction

[0050] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0051]The present invention proposes a method for calculating the synthetic electric field strength and ion current density under haze weather. The theoretical basis is that the calculation equation of the ion flow field of the high-voltage direct current transmission line considering the haze particles is as follows:

[0052]

[0053]

[0054] J=K h ρ e E. s (3)

[0055] In the formula, E s In order to consider the synthetic electric field intensity of haze, the unit is V / m; ρ e Is the ion space charge density, the unit is C / m 3 ; ρ f is the charge density of suspended droplets, in C / m 3 ; ρ p is the space charge density of suspended haze particles in C / m 3 ;K h is the ion mobility in haze weather, the unit is m 2 / Vs; J is the ion current density, the unit is A / m 2 . The synthetic fi...

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Abstract

The invention provides a method for calculating a corona ion flow field of a high-voltage direct-current transmission line under smog conditions, the method comprising the steps of applying an optimized simulation charge method to calculate a nominal electric field strength; applying a flux line method to calculate the composite field strength and charge density of the transmission line without considering smog; calculating the charge of suspended droplets and haze particles to obtain the total charge density; calculating the surface charge density and A value of the conductor considering smog. The total synthetic field strength and ion current density are calculated by the flux line method. This method can quickly calculate the relevant parameters in the ion flow field of a high-voltage direct-current transmission line in smog weather, such as synthetic electric field strength, ion current density, space charge density and so on, and can meet the engineering requirements. The calculation results can provide a reference for the corona effect of high-voltage direct-current transmission lines when smog is considered in the planning and design of high-voltage direct-current transmission lines.

Description

technical field [0001] The invention belongs to the field of electromagnetic environment calculation of electrical engineering transmission lines, and in particular relates to a method for calculating the corona ion flow field of a high-voltage direct current transmission line under fog and haze conditions. Background technique [0002] HVDC power transmission has been widely used in my country's power transmission projects. Factors such as corona loss, radio interference, ground synthetic field and ion current density need to be considered and controlled during construction. A lot of research has been done on this aspect in China. And achieved fruitful results. However, due to frequent haze weather in recent years, new complex weather conditions have brought new challenges to DC transmission projects. In haze weather, there are a large number of suspended fog droplets and suspended particles in the air. It is full of charged ions, and the suspended particles in the smog wil...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 王慧娟罗兆楠
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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