| 摘要 |
PURPOSE:To maintain the ratio of primary and secondary absolute voltages constant without using the phase difference at phase adjustment by installing a primary and a secondary series windings in a series transformer and connecting the neutral point of the main winding of a main transformer and the line main winding of a line transformer. CONSTITUTION:A line main winding 3L, a neutral point main winding 3N and a tapped winding 4 for each phase are installed in a main transformer 1, a primary series winding 51, a secondary series winding 52 and an excitation winding 6 for each phase are installed in the series transformer 2 and a three phase phase adjuster is constructed by each main and series transformers 1, 2. The terminal of each phase main winding 3N is commonly connected to the neutral point terminal theta, the terminal of the winding 52 is cnnected to a terminal of the main winding 3L and the terminal of the winding 51 is connected to the connecting point of the main windings 3N and 3L. The tapped winding 4 is also connected commonly with a tap changer 7. The phase difference is not used at the time of phase adjustment and the ratio of primary and secondary absolute voltages is maintained constant. |
