Abstract
To realize stable operation of micro grid, it is necessary for gas engines to compensate the load changes due to demand variation as well as the power provided by other renewable energy device. It is important to grasp the load following capability of gas engines because gas engines can be controlled in response to the demands, hi addition, because of the variability of component of biomass gas which depending on the operating condition of gasification or raw material in case of supplying biomass gas to gas engine, dynamic characteristics against the fuel component variation must be investigated. In this study, newly developed dynamic simulation model of gas engine is proposed and used to simulate transient operation. With this model, the influence of various load changes and fuels on the transient response of gas engine is clarified. As a result, frequency of the load change compared with amplitude greatly influences on the transient response. The load following capability of gas engine is worse when fuel is methane fermentation gas than city gas under the condition whose frequency of the load change is larger than O.1Hz.
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