Stabilization of DC–DC buck converter with unknown constant power load via passivity?based control plus proportion?integration
نویسندگان
چکیده
It is known that constant power load (CPL) may cause a negative impedance, which seriously affects the stability of system. In this paper, new control algorithm for DC–DC buck converter feeding unknown CPL proposed. First, under assumption extracted load, standard passivity–based (PBC) presented to reshape system energy and compensate impedance proportion-integration (PI) action around passive output added improve disturbance rejection performance, forms PBC plus PI (PBC+PI). Then, parameter estimation developed, based on immersion invariance (I&I) technique, in order online estimate load. next step, scheme adopted construct an adaptive strategy. Finally, analysis cascaded containing closed-loop observer error dynamics conducted. Simulation experimental results are demonstrated validate performance proposed controller.
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ژورنال
عنوان ژورنال: Iet Power Electronics
سال: 2021
ISSN: ['1755-4535', '1755-4543']
DOI: https://doi.org/10.1049/pel2.12205