Smart Grid Control by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9783319983103
Publisher: Springer International Publishing

3 Controller Design

Several papers such as [9, 10] have posed the wide-area control problem as a constrained optimal control problem of the form:

(12)

where the state estimate follows from (7). The choice of the objective function J depends on the goal for wide-area control. For power oscillation damping, this function is often simply just chosen as the total energy contained in the states and inputs as in (12). For wide-area voltage control, it can be chosen as the setpoint regulation error for the voltages at desired buses [27], while for wide-area protection, it can be chosen as the total amount of time taken to trigger relays so that fault currents do not exceed their maximum values [6]. The set is a structure set that determines the topology of the underlying communication network. In the current state of the art, most synchronous generators operate under a completely decentralized feedback from its own speed measurement only. Thus in today’s power grid, the structure set is reflected in K as

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