Part Synchronous generator

The synchronous generator is controlled along the dq model in rotor coordinates which corresponds to DC for steady-state. The reference dq currents are transformed into stator coordinates using Park's transformation to be then realized by the vector modulator in the VSC (in rectifier mode). It is assumed that both torque and mechanical speed set-points are calculated by the wind turbine controller such that the cost price of electricity generated by the wind turbine is minimal. It should be stressed that all variables used for the control of the synchronous generator are lower-bounded and/or upper-bounded by physical constraints. For example, the currents are limited to the maximum value that the power electronic components can hold to avoid overheating, and the mechanical speed is limited by the mechanical constraints. The aforementioned parts will be treated in detail in the next three subsubsections.

Figure 6.3: Control of direct-drive synchronous generator of the Lagerwey LW-50/750 wind turbine in rotating dq-reference frame, with VSC: voltage source converter (in rectifier mode).
Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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