Loading...

Dual Lagrangian modeling and Lyapunov-based control of three-level three-phase NPC voltage-source rectifier

Mehrasa, M ; Sharif University of Technology | 2012

1245 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/EEEIC.2012.6221474
  3. Publisher: IEEE , 2012
  4. Abstract:
  5. The load current of three level/phase neutral point clamped rectifier could be expressed in two forms: the load current involving the current of capacitor C1, and the load current involving the current of capacitor C2. Using the Euler-Lagrange model based on the superposition law and the obtained load current, a new dual Lagrangian model of the rectifier is founded in this paper and then the two obtained nonlinear state space models are developed in dq0 reference frame. According to the new model, two positive definite Lyapunov function candidates are defined and a Lyapunov-based control is applied to the rectifier. Each of the function is utilized to control its corresponding output voltage and also both functions are used to keep Neutral Point Potential (NPP) at 0 V. The MATLAB/SIMULINK results showed that: 1. the rectifier can be stabilized globally for handling large-signal disturbances. 2. The rectifier Exhibits good transient response in the rectifying modes. 3. Very low THD 4. The oscillation of the neutral point potential (NPP) is limited 5.Unity power factor
  6. Keywords:
  7. 3 Level/phase NPC rectifier ; Euler-Lagrange model ; Lyapunov function candidates ; 3 Levels ; Euler-lagrange models ; Lagrangian ; Lagrangian models ; Large-signals ; Load currents ; Lyapunov's direct method ; Lyapunov-based control ; MATLAB /simulink ; Neutral point clamped rectifier ; Neutral point potential ; Nonlinear state space models ; Output voltages ; Positive definite ; Power factors ; Reference frame ; Superposition law ; Three-level ; Voltage source ; Capacitors ; Electric power factor ; Electrical engineering ; Lagrange multipliers ; Lyapunov functions ; State space methods ; Electric rectifiers
  8. Source: 2012 11th International Conference on Environment and Electrical Engineering, EEEIC 2012, Venice, 18 May 2012 through 25 May 2012 ; 2012 , Pages 737-743 ; 9781457718281 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6221474&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6221474