PSS-control as an ancillary service

This paper proposes that the control action provided by power system stabilizers (PSSs) to enhance system stability, be considered as one of the system ancillary services. To this effect, there is a need to formulate appropriate financial compensation mechanisms for the generators, in return for their service. At the same time, it is also important to identify which PSS is more crucial for system stability, and also those which could be even detrimental to overall system stability. A cooperative game theory-based approach using the Shapley value criterion is developed in this paper to identify the marginal contribution of each PSS to the total control effort. Accordingly, the method outlines appropriate allocation of payment to each generator involved in providing the PSS-control.