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Conventional control strategies for parallel operation of inverters are mainly classified into two categories. One is based on interconnection line which transfers the active and reactive power of each inverter. However, once a fault occurs at the communication channel, the whole system must be shut down. The other prevalent approach is using droop control theory, which needs no communication mechanism...
In this paper, a five-stage fault protection scheme against the short-circuit fault for parallel high-power three-phase combined inverter to achieve high reliability is proposed. There are two control modes, Voltage Controlled Mode (VCM) and Current Controlled Mode (CCM). VCM operates under normal operation to keep constant output voltage. CCM operates under fault operation to limit the output current,...
This paper proposes a four-step open-circuit fault diagnosis and fault-tolerant scheme for isolated phase-shifted full-bridge (PSFB) dc–dc converters to improve the reliability. The fault diagnostic method utilizes the primary voltage of the transformer as the diagnostic criterion, which can be obtained easily by adding an auxiliary winding. When an open-circuit fault occurs in any switch of the PSFB...
The method of designing the monitoring system of high-power three-phase inverter based on CAN bus was well introduced. It can monitor remotely and control real-timely the operating parameters and status of high-power three-phase inverter. With experiments testified, it is low-cost, and of good real-time nature and high reliability.
Combined three-phase inverter is constituted of three signal H-bridge inverters. This topology has several advantages and specially suits for high power application. However, when applying combined configuration into high power application, many new features are found. These new features affect the performance of inverter system in many ways. On the viewpoint of system, these new features must be...
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