  In an attempt to improve the utilization efficiency of multi-energy coupling
in park-level integrated energy system (PIES), promote wind power consumption
and reduce carbon emissions, a low-carbon economic operation optimization model
of PIES integrating flexible load and carbon trading mechanism is constructed.
Firstly, according to the characteristics of load response, the demand response
is divided into four types: which can be shifted, transferred, reduced and
replaced. Secondly, the PIES basic architecture is given by considering the
combined heat and power generation coupling equipment, new energy and flexible
load in the park. Finally, introducing the ladder-type carbon trading mechanism
into the system and minimize the total operating cost, the low-carbon economic
operation optimization model of PIES is established. The YALMIP toolbox and
CPLEX solver are used to solve the example, the simulation results show that
the participation of electrical and thermal coupled scheduling and flexible
electric or thermal loads can significantly reduce the system operating cost,
reduce the load peak-to-valley difference and relieve peak power consumption
pressure.
