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Decentralized Control System Definition and Techniques

Decentralized Control System Definition and Techniques: Decentralized Control System – In view of the large size of a modern power system, it is virtually impossible to implement either the classical or the modern LFC algorithm in a centralized manner.   In Fig. 8.24, a Decentralized Control scheme is shown. x1 is used to find out …

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Discrete Time Control System

Discrete Time Control System: The Discrete Time Control System is described by a set of linear differential equations where x, u, p are state, control and disturbance vectors respectively and A,B and Γ are constant matrices associated with the above vectors. The discrete-time behavior of the continuous-time system is modelled by the system of first …

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Load Frequency Control with Generation Rate Constraint (GRC)

Load Frequency Control with Generation Rate Constraint (GRC): Load Frequency Control with Generation Rate Constraint (GRC) – The Load frequency Control problem discussed so far does not consider the effect of the restrictions on the rate of change of power generation. In power systems having steam plants, power generation can change only at a specified …

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Automatic Voltage Control

Automatic Voltage Control: Automatic Voltage Control – Figure 8.20 gives the schematic diagram of an automatic voltage regulator of a generator. It basically consists of a main exciter which excites the alternator field to control the output voltage. The exciter field is automatically controlled through error e = Vref – VT, suitably amplified through voltage …

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Load frequency Control and Economic Dispatch Control

Load frequency Control and Economic Dispatch Control: Load frequency control with integral controller achieves zero steady state frequency error and a fast dynamic response, but it exercises no control over the relative loadings of various generating stations (i.e. economic dispatch) of the control area. For example, if a sudden small increase in load (say, 1%) …

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Proportional Plus Integral Control

Proportional Plus Integral Control: Proportional Plus Integral Control – It is seen from the earlier discussion that with the speed governing system installed on each machine, the steady load frequency characteristic for a given speed changer setting has considerable droop, e.g. for the system being used for the illustration above, the steady state droop in …

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Load Frequency Control of Isolated Power System

Load Frequency Control of Isolated Power System: To obtain the dynamic response of Load Frequency Control of Isolated Power System giving the change in frequency as function of the time for a step change in load, we must obtain the Laplace inverse of Eq. (8.14). The characteristic equation being of third order, dynamic response can …

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