CONTROLLING THE TIMING OF A TRANSFORMER TAP CHANGE
- Inventors:
- GUDE RODRIGUEZ ISAAC
- Unai Garro Arrazola
- Manex Barrenetxea Iñarra
- Jose Maria Canales Segade
- OLARIETA ETXEBARRIA IGOR
- SANTODOMINGO LLAMAS FERNANDO
- SIEMENS GAMESA RENEWABLE ENERGY INNOVATION & TECHNOLOGY SL
WO2023208849A1 (02-11-2023)
EP4480084A1 (25-12-2024)
AU2023262463A1 (10-10-2024)
EP4270772A1 (01-11-2023)
WO2023208849A1 (02-11-2023)
CN119137855A (13-12-2024)
WO2023208849A1 (25-04-2022)
Abstract
A method of generating a timing control signal (80) for controlling the timing of a change of a transformer tap of a transformer (20) is provided. The transformer (20) comprises an on-load tap changer (30) comprising plural respective transformer taps (25-27). The method comprises monitoring a voltage on a primary side and/or on a secondary side of the transformer (20) to obtain a monitoring signal (91) and deriving, from the monitoring signal (91), an intermediate signal (95) that is indicative of at least one zero crossing of a tap voltage at the transformer tap (25-27). Deriving the intermediate signal (95) comprises estimating, based on the monitoring signal (91), a phase of the monitored voltage to obtain a phase signal (94) and applying to the phase signal a phase correction for a phase shift between the monitoring signal (91) or a signal derived therefrom and the tap voltage at the transformer tap (25-27). The timing control signal (80) is derived from the intermediate signal (95).