The continuous growth of the electrical system, results in the transmission system to be heavily loaded and run with less stability margin. To relieve the lines and provide sufficient transient stability margin in the existing transmission system, Flexible AC Transmission Systems (FACTS) controllers and High Voltage Direct Current (HVDC) can been used. However, in a large power system, which includes generation units, loads and power electronics controlled devices (such as STATCOMs, SVCs, but also, for example, wind turbines and electric drives), interaction between different controllable objects can lead to system destabilization and a coordinated control of these objects is of high importance to guarantee a secure operation of the power system. The aim of this project is to develop a control strategy for distributed power electronics devices to provide power system stability enhancement in a large power system. For this, the interaction that could arise among the different controllable objects will be studied in detail and a coordinated control algorithm will be developed. The control strategy will be based on online estimation of the power oscillation components following system disturbances and will be designed to be robust against system parameter uncertainties and impact of interaction from the different power system components.
Full Professor at Chalmers, Electrical Engineering, Electric Power Engineering
Funding Chalmers participation during 2013–2015