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Method for calculating surface field of valve hall fittings

A surface electric field and valve hall technology, applied in computing, electrical digital data processing, instruments, etc., can solve problems such as complex working environment, limited simulation means and methods, and numerous equipment

Inactive Publication Date: 2016-11-23
CSG EHV POWER TRANSMISSION +1
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Problems solved by technology

[0003] In recent years, based on electromagnetic field finite element calculation software, relevant domestic teams have used numerical calculation methods to analyze the overall electric field distribution in the valve hall under a certain loading condition. The surface electric field distribution under various operating conditions is rarely mentioned in the literature, mainly because there are many devices in the valve hall, the working environment is complex, and the simulation means and methods are limited.

Method used

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  • Method for calculating surface field of valve hall fittings
  • Method for calculating surface field of valve hall fittings
  • Method for calculating surface field of valve hall fittings

Examples

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Embodiment 1

[0026] Such as figure 1 As shown, calculate the electric field on the surface of a valve hall fitting.

[0027] Step 1: Determine the voltage and current commutation angle of the AC and DC side of the valve hall under rated and light load conditions, and the system rated power, and then establish a PSCAD circuit simulation model, for rated power and light load conditions (0.1 times rated power) inside the valve hall The potential waveforms of various metal fitting potential excitation points are simulated. Then the data obtained by PSCAD simulation is discretely extracted at equal time intervals, and the interval of about 40° is selected. It includes the moment when the potentials applied to parts such as the high-voltage side (Y side) YA, YB, YC and the DC outlet tube mother take the highest value respectively. Our research group loads and analyzes the potentials selected above to calculate the electric field strength at each point of interest. Table 1 and Table 2 show the...

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Abstract

The invention discloses a method for calculating surface field of valve hall fittings. Since the inside of a valve hall is sophisticated in alternating current and direct current and equipment operating voltage harmonic is rich in content, transient field is calculated according to potential waveform from principle analysis. However, ANSYS software is used to perform transient field calculation under the model of the valve hall, multiple hours in calculating each step is needed, calculating quantity is high, and even a high-performance computing platform is hard to realize calculation. The method for calculating the surface field of the valve hall fittings is simple in calculation, high in accuracy, high in efficiency and practicable.

Description

technical field [0001] The invention relates to an electric field calculation technology for super / ultra-high voltage direct current transmission, in particular to a method for solving the electric field on the surface of fittings in a valve hall of a converter station. Background technique [0002] The valve hall is the focus of multi-interface, multi-interface, multi-level and multi-stage coordination of DC complete set design, engineering design, manufacturer's equipment, construction and installation, etc. The technology is complex and there are many interfaces, and some core technologies have been mastered by foreign parties. As a bridge connecting the electrical equipment in the valve hall, the valve hall fittings are important equipment to ensure the safe operation of the equipment inside the valve hall, and are an indispensable part to ensure the correct operation of the entire DC transmission system. Correct and reasonable selection of valve hall fittings is of grea...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 胡蓉孙帮新黄昆任成林张雪波杜志叶金硕杜鹏飞谢一鸣
Owner CSG EHV POWER TRANSMISSION
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