PI Controller Tuning Methodology for Digital Voltage Regulator (DVR) Control Systems

In control systems, PI controllers represent one of the most commonly utilized control mechanisms. For Digital Voltage Regulator (DVR) control applications, PI controllers serve as essential tools for precise output voltage regulation. Understanding the operational principles of PI controllers and their implementation in DVR control architectures is therefore crucial for effective system design. The PI controller continuously adjusts its output signal based on the input signal it receives, which typically consists of an error signal representing the difference between the reference setpoint and the actual measured value. This error signal drives the PI controller's output adjustments through two parallel computational paths: the proportional term provides immediate response proportional to the current error, while the integral term accumulates past errors to eliminate steady-state偏差. In code implementation, the PI control algorithm typically follows the discrete-time form: output = Kp * error + Ki * Σ(error * dt) where Kp represents the proportional gain, Ki the integral gain, and dt the sampling time interval. The controller's output adjustments ensure the control system's output maintains compliance with required specifications and performance standards through continuous error correction and system response optimization.