On-load tap changer is an important part of transformer. It playing role in voltage regulation, and its safe stable operation affects the reliability power supply grid. The has to maintenance after a certain number operations. In process, there are problems such as long time consumption low efficiency. On this basis, paper proposes development on main transformer on-load hoisting equipment. bee...

This research presents a new voltage regulation philosophy that enhances the magnitude in power distribution network where distributed generation (DG) is prevalent. Voltage networks relies heavily on On-Load Tap-Changer (OLTC) installed transformers. Since it was designed for without DG, OLTC's current scheme uses fixed reference and hence cannot regulate network. Therefore, proposed novel syst...

This paper reports on prospective tests of a system protection scheme against long-term voltage instability relying on a set of distributed controllers, each monitoring a transmission voltage, blocking tap changers and shedding loads in a zone. The emergency actions adjust in magnitude and location to the disturbance. Each controller acts in closed-loop, which guarantees robustness. The method ...