| 摘要 |
A voltage source converter station including a multilevel voltage source converter, for conversion of electrical power between AC and DC, and a control system. The voltage source converter comprises a plurality of switching cells (8) including switchable semiconductors, and the control system comprises at least one main control unit (4) for providing a voltage reference signal and a plurality of cell control units (10). Each cell control unit (10) using carrier based pulse width modulation for controlling the switching of a respective cell, wherein the main control unit (4) is communicatively connected to the cell control units (10) and provides the reference voltage signal to each cell control unit (10) and each cell control unit creates a switching signal to each respective switching cell using the reference voltage signal and a carrier signal to effectuate the conversion. The converter station is characterised in that each of the cell control units (10) have a higher data processing rate than the main control unit (4), and the reference voltage signal is converted to the higher data rate by the cell control unit. |
