POWER PLANT AUTOMATIC CONTROL SYSTEM Russian patent published in 2009 - IPC F02C9/28 

FIELD: power engineering.

SUBSTANCE: required quality of electric energy generated with an electric generator is provided owing to identifying operating mode of electric generator - independent operation or parallel with industrial power system. If independent operation signal is available or if load activation signal is non-available, n_st ^spec value is compared to rotation frequency n_st measured in the third electronic control at the outlet whereof there formed is control signal I_control by fuel metering unit actuator, which changes fuel consumption G_f to combustion chamber of gas turbine engine proportional to deflection Δn_st value with the purpose of maintaining the specified rotation frequency n_st ^spec. In case there is no independent operation signal and if there is load activation signal at the inlet of the signal-conditioning unit on operation mode of electric generator at the outlet of the unit there formed is signal I₄=1. At increase of network alternating current frequency, electric generator output power will start decreasing. This will lead to increase of actual value n_ct in comparison to n_st ^spec. In the third electronic control there generated is unbalance signal Δn_st=n_st ^spec - n_st, and control signal I_control will be formed for decrease of fuel consumption G_t to combustion chamber of gas turbine engine. When reaching equality n_st=n_st ^spec, decrease of supplied fuel G_t will stop (in the third electronic control the unbalance signal Δn_st =0), at that, n_{vd pr} value will correspond to lower generator output power to network, and Δn_st value will correspond to increase of network alternating current frequency. At decrease of network alternating current frequency the control process will be performed in a similar way but in order of increasing generator electric output power to the network (and therefore to increase of n_{vd pr}) for maintaining equality n_st= n_st ^spec.

EFFECT: providing required quality of electric energy generated with electric generator.

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