PWM current control techniques of voltage source converters-a survey

The paper gives a synthetic survey of available current control techniques of the voltage source inverters. These techniques have gained an increasing importance with the widespread application of voltage source inverters in high performance applications, such as AC drives, AC power supplies and active filters, where fast response and high accuracy are needed. A variety of methods have been proposed, which can be gathered into three main categories: linear control (or ramp comparison), hysteresis control and predictive control. The fundamentals of these methods are described and the more recent developments are discussed. The impact of the introduction of digital techniques and of the availability of powerful microcontrollers on the development of reliable and sophisticated current controls is put in evidence