Design of Settlement Mechanism of Inertia Ancillary Service Market Based on Value Contribution

The inertia of the power system is provided free of charge or implemented in an extensive fixed compensation mode, which is difficult to adapt to the changes in system operation characteristics brought about by the large-scale access of new energy. Therefore, it is urgent to build a market-oriented inertia ancillary service transaction settlement mechanism, promote the participation of conventional generators in the market supply inertia through economic incentives, and guide new energy generators to carry out investment and technological transformation of virtual inertia, so as to cultivate a sustainable inertia ancillary service ecology and build a solid guarantee for the safety and stability of the power grid with a high proportion of new energy. Based on this, this paper defines and calculates the value contribution index of inertia service, and establishes a settlement model of inertia service based on value contribution. Finally, the effectiveness of the proposed settlement mechanism is verified by constructing a case study of a power system with a high proportion of new energy.