Abstract:

The brand-new combined power flow device without a transformer (UPFC) modulation and control method is described in this paper. It is common knowledge that the conventional UPFC, which consists of two back-to-back inverters, needs large, frequently intricate zigzag transformers for separation in order to achieve high power ratings with desired voltage wave form. A fully substations-free UPFC built on an innovative configuration of two cascade multilevel inverters (CMIs) is being developed. suggested as a solution to this issue. The new UPFC has a number of benefits over the conventional technology, including the absence of a transformer, excellent effectiveness, low cost, and quick changing response; thin and light. This article's primary topics are modulation and control for this new transformer-free UPFC. Improved fundamental frequency modulation (FFM) for high efficiency, regardless of total harmonic distortion (THD), and low management of dc-link voltage balance, dc-link active and reactive power management, etc. Experiments based on a 4160 V test setup are used to validate the brand new UPFC with the suggested control method. In this paper, both the steady-state and the dynamic-response outcomes will be given.

Description:

Cascaded Multi-level inverter, Unified Power Flow Controller