| 摘要 |
A control system for control of supply of electrical power from a network to various groups of impedances comprises a synchronisation system for synchronising with the cycles of an AC supply network and a programmable control unit. The programmable control unit has control tables. Each control table corresponds with a particular percentage of maximum electrical power. Each control table has a sequence of bits, the percentage of 1 values corresponds to the percentage of maximum power. The programmable control unit provides digital outputs in the form of control tables for the command of static power switches which control electrical power to the various groups of impedances. The impedances of one group are connected in star and the various groups are connected in parallel. The control system guarantees an efficient use of the electrical power, equally distributed over the three phases with a low level of harmonics. |
