Fault Tolerant Control of Advanced Power Generation Center for More-Electric Aircraft Applications

Abstract

This paper presents a control scheme for a recently reported aircraft advanced power generation center (APGC) during postfault operation conditions. Within the APGC, two electrical generators extract power from two separate engine shafts and supply electrical power to a common HVDC bus through their dedicated main AC/DC power converters. An extra back-to-back (BTB) converter is also used to connect the ac terminals of the two generators. This architecture provides merits of fault tolerance capabilities of the APGC. In the case of main AC/DC power converter failure, the system can be reconfigured and the BTB converter provides an extra power flow path from the generators to the HVDC bus. This ensures electrical power generation capabilities onboard. The paper discusses in detail the control of the APGC under fault conditions with one main AC/DC converter failure. A seamless transition scheme from normal operation to postfault conditions is proposed using a voltage command initialization technique within the BTB converter. Both experimental and simulation results have verified the fault tolerance improvement and control performances of the APGC.

Analysis and Fault-Tolerant Control for Dual-Three-Phase PMSM Based on Virtual Healthy Model

“…Reliability is a core requirement in electrical drive systems, especially in more electric aircraft and electric vehicles [3][4][5][6]. And the fault tolerant control of PMSMs has been intensively studied to improve the reliability.…”

“…The transformation matrix from the original stationary coordinate system (ABC, A 1 B 1 C 1 ) to the 2-phase stationary coordinate system (α-β, z 1 -z 2 ) is shown in (4) according to [36]. The voltage equation in this coordinate system is shown in (5).…”

“…Then, the controller output voltage of the faulty phase, u c1_c , is derived. u α_c , u β_c , u z1_c , u z2_c are calculated by the FTC scheme which is designed based on voltage-current equations shown in (5) and (9). Then the controller output voltages, u a_c ~ u c1_c are derived through SVPWM.…”

A GOA-Based Fault-Tolerant Trajectory Tracking Control for an Underwater Vehicle of Multi-Thruster System without Actuator Saturation

“…T HE study of vehicle controls has been extended to various conditions where fault tolerance is widely involved in the corresponding control design, which is denoted as faulttolerant control (FTC) [1,2]. Scientists have worked on the FTC study for decades in various fields such as crafts in the air or space, land vehicles and industrial manufacturing [3][4][5][6][7][8][9][10]. In previous studies, the FTC is usually applied to alleviate abrupt errors and provides the most feasible solution when inevitable damages happen for equipment in different fields [11].…”

Technical Review of Dual Inverter Topologies for More Electric Aircraft Applications

“…On the other side, it is very important to note that for aerospace applications, simply having better power densities is not enough. Regardless of how pushed the design is in terms of power density, the electrical drive still needs to respect the fault-tolerant capabilities that are set for such safety-critical applications [6] [26]. Driven by the motivations of enhancing DC-link voltage utilization, the power quality as well as the fault-tolerant capability, new inverter topologies as well as adapting advanced modulation schemes are being intensively investigated [27].…”