UHVDC (Ultra High Voltage Direct Current) line ground three-dimensional composite electric field calculation method capable of considering terrain influence

Abstract

The invention provides a UHVDC (Ultra High Voltage Direct Current) line ground three-dimensional composite electric field calculation method capable of considering terrain influence. The method comprises the following steps: S1: firstly, simplifying a complex terrain into an undulant three-dimensional ground, and establishing a three-dimensional composite electric field calculation model; S2: selecting any one calculation point on the ground, and utilizing a three-dimensional nominal electric field obtained by a moment method to determine an electric line of force from the point back to the surface of a lead; S3: setting an electric charge density initial value of the surface of a transmission lead, and obtaining the electric charge density and the nominal function of each point from the surface of the transmission lead along the space of the electric line of force; S4: updating the electric charge density of the surface of the lead until an average value of the spatial electric charge density meets a limitation condition; and S5: according to the obtained electric charge density and the nominal function, calculating a three-dimensional composite electric field on a complex ground. The method is based on a Deutecsh hypothesis principle and is combined with the moment method, influence on the three-dimensional composite electric field by the complex terrain is considered in a calculation process, and electromagnetic environment evaluation carried out when a UHVDC transmission line goes through the complex terrain can be realized.

Description

technical field [0001] The invention relates to a calculation method of an electric field, in particular to a calculation method of a three-dimensional synthetic electric field on the ground of a UHVDC (UltraHighVoltageDirectCurrent: UHVDC) line considering the influence of terrain. Background technique [0002] With the rapid development of my country's economy, the demand for electricity is also increasing. Since the load is far away from the energy base, in order to realize the optimal allocation of resources, UHVDC transmission technology, which has obvious advantages in long-distance, point-to-point large-capacity transmission, has developed rapidly. At present, many UHVDC transmission lines have been built in my country, and the electromagnetic environment problems caused by them have also attracted people's attention, especially the synthetic electric field, which is one of the important parameters of the electromagnetic environment of UHVDC transmission lines. [00...

AI Technical Summary

Problems solved by technology

According to the actual measurement on site, it is found that the undulating ground has a great influence on the synthetic electric field of the HVDC transmission line

However, up to now, there is no method for calculating the three-dimensional synthetic electric field on the ground of UHVDC transmission lines that can consider complex terrain

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