Abstract
This paper proposes a grid-connected multilevel in ocean current power generation system. An experimental dynamometer with water tank is built up. A diode-clamped three-level inverter is developed to reduce the voltage change rate of power devices. A Petri-nets controller is used in the multilevel inverter. The multilevel inverter usually requires complex switching logic especially when the space vector PWM is involved. If-then logic description will have tedious programming problem depending on the control logic in the multilevel inverter. By using the developed Petri-nets algorithm in matrix form, the control signals have parallel arithmetic operation in digital controller as compared to the conventional controller for the multilevel inverter. The timing sequence of control logic is generated automatically by matrix approach. Experimental results are illustrated to show the practical control of power and reactive power connecting to the power grid. With the help of the proposed Petri nets controller, it is shown that a systematic Petri-nets based controller is successfully developed in the multilevel inverter connecting to the power grid for the ocean current power generation system.
| Original language | English |
|---|---|
| Pages (from-to) | 858-869 |
| Number of pages | 12 |
| Journal | International Review of Electrical Engineering |
| Volume | 5 |
| Issue number | 3 |
| State | Published - 2010 |
| Externally published | Yes |
Keywords
- Grid-connection
- Multilevel inverter
- Ocean current
- Petri nets
- Power generation