電力變壓器外文翻譯--測量扭曲的一個空載電流的2060kv6mva yy0電力變壓器（節(jié)選）

1、中文 中文 3060 3060 字附錄 A 外文翻譯A.1 外文原文Measurements of the distorted no-load current of a 20/60kV 6MVA Yy0 power transformerKim Søgaard Wojciech T. Claus Leth BakAalborg University

2、 Wiechowski Aalborg University Aalborg, Denmark Aalborg University Aalborg, Denmarksoegaard@ieee.org Aalborg, Denmark clb@iet.auc.dkwtw@iet.auc.dk ABSTR

3、ACTThis paper presents the results from measurements of the distorted no-load current of a 6MVA 20/60kV transformer. In the execution of the measurement, the supply setup during the measurements has been changed. The cha

4、nges imply different connections of the 0.4/20kV supplying transformer. The secondary winding of the supplying transformer are connected in D, wye and YN, and for each connection, the measurements are repeated. The measu

5、rement is performed with constructed current and voltage transducers with an amplitude accuracy better than ±1%. It has been shown that the harmonic contents in the no-load current the 6MVA 20/60kV transformer Thrig

6、e is as predicted by [6]. 1. INTRODUCTION Due to the lack of measurements of the distorted no-load current of large power Figure 1. Schematic diagram of the supply setup for 20/60kV transformer Thrige in Aggersund. 2. ME

7、ASUREMENT SETUP 2.1. CURRENT TRANSDUCER The current transducer is a LEM PR30 current probe. The current transducer transforms the measured current to a voltage with a precision that is present in Table 1 next to the dema

8、nds from IEC 61000-4-7[5]. Table 1. Precision for the current transducers and demands from IEC 61000-4-7. Accuracy current IEC61000-4-7TransducerAmplitude ± 1 % ± 5 %Phase < 2 º -Freque

9、ncy range DC to 100 kHz DC to 2.5 kHzThe precision for the current transducer is obtained from the relevant datasheet [4]. The LEM current transducer is placed on adapted cardboard that guarantee centre position around t