Low-carbon power system economic dispatch considering renewable energy accommodation

In recent years, the problems of the energy crisis, environmental pollution, and global warming have provided good opportunities for the development of renewable energy. At the same time, the large-scale introduction of variable and limitedly predictable renewable energy also brings in huge challenges for the economic dispatch of the integrated electricity and natural gas system (IEGS). Thus, a stochastic low-carbon economic dispatch model (SLCED) with carbon capture power plants (CCPPs) and Power-to-gas (P2G) units is presented in this paper. The mathematical models of CCPPs and P2G units are reviewed first. Then, the operation mechanism of the low-carbon system with CCPPs and P2G is analysed. To increase the accommodation of renewable energy and control the carbon-emission-related costs, a comprehensive SLCED model is formulated, in which wind power uncertainties are modelled as weighted scenarios and the carbon emissions of power plants are treated as a new set of decision variables. The effectiveness and the validity of the proposed SLCED model are verified using numerical examples based on an IEEE 24-bus and 20-node gas network integrated test system.