High-voltage cable network of high frequency: key challenges and new perspectives
The high-frequency power transformer (HFPT) and the semiconductor voltage converter (SVC) are important elements of the network under study. The construction of SVC is based on the IGBT (Insulated-Gate Bipolar Transistor). The converter operates in the frequency range from 10 to 20 kHz. It was experimentally established that the efficiency of SVC is quite large (98.5 %) . The transformer consists of two windings and a ferrite magnetic core. The coils are insulated from each other as well as from the core. The secondary winding (SW) is wound on the top of the primary winding (PW). Importantly, the highvoltage winding (SW) is divided into five sections which are connected to each other in series. More detail of transformer design can be found in “Method for Determining the Electrical Parameters of the Equivalent Circuit of High Frequency Transformer” . The basic technical characteristics of HFPT are presented below (Table 1). Table 1. Technical characteristics of HFPT
|Rated frequency||13 kHz|
|Nominal primary voltage||250 V|
|Nominal secondary voltage||1,250 V|
- the design of the transformer should be improved in order to increase power;
- for the proper evaluation of the developed models the creation of an experimental model of the distributed cable network is required.