Method for calculating synthetic field intensity and ion flow density of high-voltage direct-current transmission line by considering real-time climate conditions

Abstract

The invention provides a method for calculating synthetic field intensity and ion flow density of a high-voltage direct-current transmission line by considering real-time climate conditions. The method comprises the steps of performing calculation by applying an optimized charge simulation method to obtain nominal electric field intensity E; performing calculation by applying a flux line method toobtain the synthetic field intensity and charge density of the high-voltage direct-current transmission line when haze is not considered, and calculating corona inception field intensity by adoptinga correction formula considering climate influence; calculating charge quantities of suspended fog drops and haze particles to obtain total charge density; calculating out amplitude values A of surface charge density and electric field intensity of a wire under the condition of considering the haze; and calculating out the total synthetic field intensity and ion flow density according to the fluxline method, and calculating an ion migration rate by adopting the correction formula considering the climate influence. According to an algorithm, the influence of the climate conditions of temperature, humidity, a haze index and the like on the corona ion flow field of the high-voltage direct-current transmission line is comprehensively considered, so that the synthetic field intensity and the ion flow density under different weather conditions can be more practically calculated.

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 calculation method of synthetic field strength and ion current density of high-voltage direct current transmission lines considering real-time climate conditions. Background technique [0002] HVDC power transmission has been widely used in power transmission projects in my country. 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 Fruitful results have been achieved. Due to the long distances traversed by high-voltage direct current transmission lines, the climate conditions in various places are different, and the temperature and humidity vary greatly in different regions. In addition, in recent years, smog and haze have frequently occurr...

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Problems solved by technology

[0002] HVDC power transmission has been widely used in power transmission projects in my country. 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 Fruitful results have been achieved. Due to the long distances traversed by high-voltage direct current transmission lines, the climate conditions in various places are different, and the temperature and humidity vary greatly in different regions. In addition, in recent years, smog and haze have frequently occurred, and new complex weather conditions have brought great challenges to direct current transmission projects. It brings new challenges. In haze weather, there are a large number of suspended droplets and suspended particles in the air. Since the space around the transmission line is full of charged ions, the suspended particles in the haze will absorb charged ions and form new Charged particles cannot be ignored due to their large number, which makes the calculation of ion flow field more complicated

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