NOVELTY - A combined heat and power cogeneration system comprises fuel cell generator (10), waste heat recovery unit (60), power balancer (70), and system controller (100). The fuel cell generator generates electricity through an electrochemical reaction of hydrogen and oxygen. The waste heat recovery unit recovers waste heat generated during electricity generation in fuel cell generator and stores the waste heat as a heat source. The power balancer provides waste heat recovery unit with surplus electricity generated by fuel cell generator such that the surplus electricity is stored as heat source.    USE - System for cogeneration of combined heat and power for fuel cell (claimed).    ADVANTAGE - The system is capable of redressing the imbalance between the generated electricity and electricity demand, thus utilizing more efficiently the heat source recovered during electricity generation. The system is capable of recovering and storing as heat source the waste heat generated in electricity generation through electrochemical reactions.    DETAILED DESCRIPTION - A combined heat and power cogeneration system comprises fuel cell generator (10), waste heat recovery unit (60), power balancer (70), and system controller (100). The fuel cell generator generates electricity through an electrochemical reaction of hydrogen and oxygen. The waste heat recovery unit recovers waste heat generated during electricity generation in fuel cell generator and stores the waste heat as a heat source. The power balancer provides waste heat recovery unit with surplus electricity generated by fuel cell generator such that the surplus electricity is stored as heat source. The system controller expects and measures a consumption pattern of heat source and operates the fuel cell generator and power balancer, respectively such that the heat source is stored in waste heat recovery unit. An INDEPENDENT CLAIM is included for operating of combined heat and power cogeneration system comprising generating electricity in fuel cell generator through an electrochemical reaction of hydrogen and oxygen, recovering waste heat generated in electricity generation in the fuel cell generator, storing the waste heat in waste heat recovery unit as heat source, and optimizing the operation of fuel cell generator at an appropriate stage for heat usage pattern by measuring the heat usage pattern demanded from the outside.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of fuel cell combined heat and power cogeneration system.    Fuel cell generator (10)    Power transformer (20)    Waste heat recovery unit (60)    Power balancer (70)    System controller (100)