Contribution of phase shifting transformers to improvement of the security of power transfer from the power plant

Abstract

The paper presents a case study of the use of phase shifting transformer (PST) for improvement of security of power transfer from a power plant. The phase shifting transformer is used for increasing real power flow from the plant to higher voltage level (220 kV), i.e., redistributing the real power flows, and such reducing loading of heavily loaded 110 kV lines. This re-distribution of power flow from the plant results in local transmission network becoming more secure. The local network performance, with and without PST in place, is analysed in both steady state and transient conditions. Interconnection model of Southeast Europe, which consists of transmission network models of

A Phase-shifter for Regulating Circulating Power Flow in a Parallel-feeding AC Traction Power System

“…A phase-shifting transformer was introduced to control the power flow through the power system interconnection corridors [10]. Thyristor-controlled phase-angle regulators have been introduced to increase the power system stability margins [11][12]. These three-phase phase-shifting transformers are costly because they require a regulating transformer, a series transformer and switching devices, which can be complex [13].…”