INTELLIGENT CONTROLLING OF POWER DRIVEN SOLID BIOMASS CHP PLANTS IN FLEXIBLE DISTRICT HEATING WITH A SEASONAL HEAT STORAGE AND A POWER-TO-HEAT COMPONENT

Many German district heating systems with solid biomass combined heat and power (CHP) plants are economical inefficient and it is difficult for their operators to acquire new customers. Heating grids with power driven solid biomass CHP plants and power-to-heat (PtH) components in seasonal heat storages enable the contribution at electricity and balancing markets. The first aim is the development of a transient simulation model of a specific heat demand-driven solid biomass-heating grid in southern Germany. Subsequently a model extension follows via the addition of a long-term heat storage and PtH technology. This modeled grid flexibilisation has the ambition of an optimized combination of heat and power supply to raise the system resource efficiency (economy, ecology, efficiency). The technical and economic potential for this flexible heat supply with power demand-driven solid biomass plants and their systemic contribution are investigated in scenario simulations. The paper introduces the concept of this transition to a more flexible operation of local heat supply systems.