Developing Analysis for Large Displacement Stability for Aircraft Electrical Power Systems

A Power availablE Estimation Tool for real‐time estimation in aircraft generators

“…Clearly, Equation (13) implies that the e int state has a strong connection to the voltage regulation error e v , particularly with its transient behaviour, which is also corroborated via empirical evidence. In order to illustrate this connection and at the same time help explain the integrator resetting (IR) mechanism, consider Figure 12, where the following experiment is performed: the load signal S 1 (5 kW, 30 kW, m, t − t 0 ) is applied, followed by a second load signal, S 2 (30 kW, 5 kW, m, t − (t 0 þ d)), with t 0 = 0.2 s, m ¼ 1 kW ms and d = 15 ms. We are mainly interested in what happens at the beginning of the second load signal starting at time t 1 = t 0 þ d, and the subsequent development.…”

“…The results from the experiment in Figure 12 are representative of a phenomenon that can be observed in general: the integrator state e int is strongly linked to the transient behaviour of v gen . Un-like every other state in Equation (1) (except for the integrator in PI exc , which has very limited impact on overall transient performance), we have the ability to arbitrarily choose the value of e int at each time, whether it be via the differential Equation (13) or via other means, such as the integrator resetting approach. Therefore, it can be rightly considered an additional control design degree of freedom.…”

“…[11]. Stability by design [12,13] is an approach for offline estimation of the bus stability using reachability techniques, considering large scale displacements. The stability by design work is strongly related to the present paper, because of its focus on stability guarantees for more electric aircraft.…”