Large-scale active-load modulation for angle stability improvement

Analyses, operating experience and simulations of a large power system is u sed to demonstrate that active-load modulation can improve the system's dyn amic performance to a large extent, with just a fraction of the base load a vailable for control, At a time when the cost effectiveness of FACTS device s for damping interarea oscillations is constantly being questioned, it is natural to look to active-lend modulation as a potential alternative method of insuring grid reliability, In developing the case, it was found that co ntinuously modulating load stabilizers need to be fed with global signals f or full efficiency, Although more difficult to design, implementation of a discontinuous control scheme shows good prospects, especially with regard t o decentralization and robustness against communication delays.