GIS lightning arrester

Abstract

The invention relates to a GIS lightning arrester. The GIS lightning arrester comprises a tank body, a first flange, a second flange, a core body assembly and an insulator; the core body assembly is installed in the tank body; the first flange and the second flange are installed at the two ends of the tank body respectively; a bypass is formed in the side wall of the tank body; the insulator is installed on the bypass; the core body assembly is connected with a first connecting conductor and a second connecting conductor, the first connecting conductor is arranged in the bypass and connected with the insulator, the second connecting conductor is arranged close to the first flange, and a first shielding cover is installed between the second connecting conductor and the first flange; the core body assembly is of a multi-column resistor disc parallel connection structure, and each column resistor disc comprises a plurality of resistor discs which are connected in series. In the normal operation process of the GIS lightning arrester, a system voltage is applied to the lightning arrester, the charge rate of the lightning arrester can be controlled to be 85%, and the safety of long-term operation of the lightning arrester is ensured. When overvoltage occurs in a system, through the series-parallel connection quantity of the resistor discs of the core body assembly, the insulation of electrical equipment is protected from being damaged.

Description

technical field [0001] The invention relates to the related technical field of lightning arresters, in particular to a GIS lightning arrester, in particular to an offshore wind power DC GIS lightning arrester. Background technique [0002] With the rapid development of economy and society, new energy development has become an important part of my country's energy development strategy. As one of the clean energy sources in the future, offshore wind power has attracted more and more attention from developed countries due to its superior wind resources, environmental protection, land saving, and large scale. Germany, Denmark, the United Kingdom and other countries have listed the construction of offshore wind farms as a future The focus of large-scale wind power development. my country has a long coastline and abundant offshore wind energy resources. At the same time, the coastal areas are economically developed and have a large demand for electricity. The development and util...

AI Technical Summary

Problems solved by technology

[0005] Regarding the DC GIS arrester technology, due to the different protected equipment, the continuous operating voltage of the DC arrester can be divided into AC (not necessarily the fundamental wave), DC (including a small amount of ripple), superposition of AC and DC (and commutation overshoot ), etc., some DC arresters do not even have obvious continuous operating voltage, which makes the test complicated and difficult, especially the action load test; when the system operates or fails, some DC arresters bear much more energy than AC arresters, so they are forced to Multi-column resistor parallel structure is adopted; each surge arrester configured in HVDC converter stations affects and restricts each other according to different configurations, which is much more complicated than the configuration of AC surge arresters

In short, compared with AC arresters, DC arresters have the characteristics of large difference in continuous operating voltage waveform, large energy, and complicated research work

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