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This paper presents the vector control of six phase permanent magnet synchronous generator which is directly connected to a six leg converter. A mathematical model of the machine has been developed using the generalized two phase real component transformation. Dual synchronous d-q current control is employed so as to eliminate current imbalances. The six legs the converter are controlled to extract...
A wind farm (WF) connected by voltage source converter-based HVDC (VSC-HVDC) results in a completely ‘inertia-less’ in offshore AC grid . AC frequency is determined by control of the VSC-HVDC on the WF side, independently of the main grid frequency. Moreover, the rotational speed of a variable speed wind turbine is independent of the AC frequency of the offshore AC grid. These two aforementioned features...
The power of offshore wind turbines are expected to increase to 10 MW and more in the future. This will make today's technology unsuitable due to increased nacelle weight. Therefore, this work focus on a new modular converter solution, which designed specifically to a generator results in reduced nacelle weight. Additional benefits are redundancy and modularity in the converter.
Electrical power on offshore oil platforms is normally generated by gas turbines installed on board. Preliminary feasibility studies indicate that interconnecting these oil installations with wind farms can reduce the fuel consumption with significant environmental and financial benefits. The paper presents a sensitivity analysis of the voltage and frequency variations for typical transients on an...
This paper analyzes the extent to which the transient stability margin of wind farms using squirrel cage generators can be increased by the use of a STATCOM. A simplified analytical approach is used first to quantify the effect of the STATCOM on the transient stability margin. An experimental validation of the calculated transient margin is then presented by measurements done in a laboratory prototype...
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