A Calculation Method of Three-Dimensional Synthetic Electric Field on the Surface of UHVDC Line Considering the Effect of Terrain
A technology of synthetic electric field and calculation method, which is applied in the fields of calculation, electrical digital data processing, special data processing application, etc., and can solve the problems of large influence of synthetic electric field and undiscovered problems.
Active Publication Date: 2018-09-04
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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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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[0084] The present invention will be further described below with reference to the drawings and embodiments.
[0085] Such as figure 1 Shown: A calculation method of UHVDC line ground three-dimensional synthetic electric field considering the influence of terrain includes the following steps:
[0086] S1. Firstly, the complex terrain is simplified into a undulating three-dimensional ground, and a three-dimensional synthetic electric field calculation model is established;
[0087] S2. Select any calculation point on the ground, and use the three-dimensional nominal electric field obtained by the method of moments to determine the line of force returning from this point to the surface of the wire;
[0088] S3. Set the initial value of the charge density on the surface of the transmission wire, and find the charge density and scalar function at each point in the space starting from the surface of the transmission wire and along the power line;
[0089] S4. Update the surface charge densi...
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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 an electric field calculation method, in particular to a UHVDC (Ultra High Voltage Direct Current: UHVDC) line ground three-dimensional synthetic electric field calculation method considering the influence of terrain. Background technique [0002] With the rapid development of my country's economy, the demand for electricity is also increasing. As the electricity load is far from the energy base, in order to realize the optimal allocation of resources, the UHV DC transmission technology, which has obvious advantages in long-distance, point-to-point large-capacity transmission, has been rapidly developed. Many UHV DC transmission lines have been built in my country, and the electromagnetic environment problems caused by this have also attracted people's attention, especially the synthetic electric field, which is one of the important parameters of the electromagnetic environment of UHV DC transmission lines. [0003] For the calculati...
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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 邹岸新徐禄文宫林吴高林王谦
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST