Electric-Field Distribution and Insulation Status of ±800kV UHVDC Converter Valve After Implanting Full-View Micro-Sensor Detector

Abstract

This paper explores how the installation of the full-view micro-sensor detector will affect the electric-field distribution of ±800-kV converter valve. We build the 3D model of ±800-kV converter valve tower and use Ansoft Maxwell 3D Field Simulator to study the electric-field distribution of ±800-kV converter valve tower with the full-view micro-sensor detector at different logical suitable locations. The results show that the installed locations have nearly no influence on the maximum electric-field distribution of non-direct contacted components; but for the direct-contacted components, the maximum electric-field has increased to a certain degree. The results further show that the electric-fields distribution especially the maximum electric-fields distribution at different locations is different, but the maximum electric-field value is still less than the 3 kV/mm. Thus, it can be concluded that the installation of full-view micro-sensor detectors can lead to an increase of maximum electric-field, but it has no influence on the insulation condition of valve tower, and the insulation design still meets the requirements well. Finally, the experiment validates that the installation of the full-view micro-sensor detector is feasible.INDEX TERMS Full-view micro-sensor detector, ±800kV converter valve, valve component, electric-field simulation, maximum electric-field, insulation status.

Research on Losses and Heat Dissipation of Saturable Reactor Used in Converter Valve

“…Eddy current loss is the main part of the core loss. It is of great significance to study the factors affecting the eddy current loss of the saturable reactor core during the operation of the converter valve [4]. The eddy current loss per unit weight of the monolithic silicon steel sheet of the saturable reactor is as equation ( 3):…”

“…The relaxation effect causes additional loss in the iron core, which is much smaller than the hysteresis loss and eddy current loss. The additional loss calculation is as [4]:…”

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Study for Influence of Harmonic Magnetic Fields on Vibration Properties of Core of Anode Saturable Reactor in HVDC Converter Valve System

“…HVDC technology has been developed in recent years, by converting the AC power into DC power at the sending end, and then transmitting to the receiving end, where the DC power is inverted into AC power to feed back to the AC system [1][2][3][4][5]. The anode saturated reactor (ASR) is the key component in the HVDC system.…”