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Application of solid-oxide fuel cell in distributed power generation

Application of solid-oxide fuel cell in distributed power generation

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Published

A dynamic model of a solid-oxide fuel cell (SOFC) of 100  KW capacity has been developed with a control action associated with it for application in distributed power generation. The SOFC system is chosen as a distributed energy resource (DER) because of its ability to tolerate relatively impure fuels. It also can be operated at a higher operating temperature. This dynamic model can be used to simulate and analyse the performance of such a system both in stand-alone and integrated mode with other DERs to predict its dynamic behaviour and load-following characteristics. With a control strategy developed to control the active power and inverter output ac voltage, it is highly efficient and capable of providing good dynamic behaviour and load-following characteristics while maintaining load parameters. The proposed model is used to simulate a step change in power demand from the inverter-side controller to the SOFC-inverter system. It uses two proportional-integral controllers separately with the SOFC system to control fuel flow in accordance with power demand and to maintain the bus voltage constant at the set point value.

Inspec keywords: PI control; distributed power generation; power control; solid oxide fuel cells; voltage control; fuel cell power plants; invertors

Other keywords: distributed power generation; active power control; proportional-integral controllers; inverter output ac voltage control; distributed energy resource; solid-oxide fuel cell; dynamic behaviour; power 100 kW; SOFC-inverter system; load-following characteristics

Subjects: Distribution networks; Power convertors and power supplies to apparatus; Fuel cell power plants

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