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Indexed by:期刊论文

Date of Publication:2012-03-01

Journal:INTERNATIONAL REVIEW OF ELECTRICAL ENGINEERING-IREE

Included Journals:SCIE、Scopus

Volume:7

Issue:2

Page Number:3836-3844

ISSN No.:1827-6660

Key Words:VLF High Voltage; Sinusoidal VLF; Segmental Data Processing

Abstract:The topology and the control strategy of a novel sinusoidal very low frequency (VLF) high voltage generator are introduced in this paper. To minimize the influence of distributed parameter of High Frequency High Voltage transformer, Series-parallel (LCC) resonant technology is applied to reduce the impact of the distributed parameters, decreasing the power loss and the volume of the transformer. The Closed-Loop control technology is adopted to reduce the influence by the combination of changing duty cycle and operating frequency. Simultaneously, the principle of segmental data processing is proposed to obtain different steady state operating points, greatly reducing the calculation of the Microcontroller Unit (MCU), improving the control accuracy. As a result, it was accomplished by MCU successfully. The test of the 35kV/0.1Hz power supply has been taken on a capacitor (1.5uF) which is equivalent to the XLPE cable on electrical character. Total harmonic distortion is less than 1% which can meet IEEE400.2 standard well. The results of the experiment verify the accuracy and feasibility of the control theory and the topology. Copyright (c) 2012 Praise Worthy Prize S.r.l. - All rights reserved.