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In DC Microgrid, the majority of the loads are connected to the grid via power electronic converters. These loads act as constant power loads (CPLs) when tightly regulated. If the voltage changes, the CPLs behave negative incremental impedance characteristic during dynamic periods, and could cause system instability. To guarantee the system stability and simultaneously maintain the CPLs good performances,...
In the DC power systems of More Electric Aircraft, the closed-loop controlled electrical motor drives and power electronic converters can be generally regarded as constant power loads (CPLs), and usually lead to negative impedance-related instability. Depending on Brayton-Moser's mixed potential theory, this paper adopts R parallel damping filters to stabilize the CPLs systems, and derives large signal...
In high-voltage dc power systems of advanced aircraft, most of the electrical motor drives and power electronic converters behave as constant power loads (CPLs) when tightly regulated and usually cause negative impedance instability problems. This paper presents stability criteria for an electrical system constituted of a dc power supply, multistage LC filters, and an ideal CPL. The derived criteria...
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