New medium voltage drive put into operation

Recently, a high-reliability, three-level, 200 kilowatt medium voltage frequency converter developed jointly by the Department of Electrical Engineering of Tsinghua University and a Tianjin company is the key to these two multi-level inverters for midpoint clamping and voltage jump. The problem, proposed and implemented VVVF software algorithm with practical engineering application value.
At present, this three-level inverter has been successfully applied to the submersible pump drive in many oil fields. Under different AC voltages and frequencies, the start, operation, and stop of the motor are very stable, and there is no large inrush current. At a certain input voltage and output frequency, the output power, flow, and head can meet the requirements. The input power factor is close to 1 and there is a significant energy-saving effect. Inverters increase the speed under overclocking conditions, and the motor power is greatly increased, which can increase production. the goal of.