Biomass power generation is equivalent to small thermal power

which is inefficient when it is used alone

and little attention has been paid to the optimization scheduling of the biomass thermal power system among the existing literatures. To solve the above problems

the rural integrated energy system is taken as the research object

and a bi-level optimization method of comprehensive energy operation is proposed

which is able to promote a variety of renewable energy consumption efficiently. By supplemental firing equipment

the operation state of combined heat and power(CHP)of thermal gas and biomass is adjusted

and a model of biomass CHP with supplemental firing equipment is established. Focusing on the joint control of multiple CHP units with supplemental firing equipment

with the comprehensive energy supply cost and energy efficiency as the upper and lower optimization objectives respectively

the energy distribution and dispatching between the CHP units and the internal operation status of the CHP units are optimized. And a bi-level optimization model of regional energy hub including photovoltaic

biomass and natural gas is established. The case study proves that the hybrid energy supply of biomass energy can improve the system energy efficiency and reduce the cost of energy supply.