This paper proposes a novel hybrid active power filter (HAPF) topology based on the cascaded connection of the AC-side capacitor and the third-order LCL-filter, which has the advantage of the conventional hybrid filter and the LCL-filter in terms of reduced dclink voltage and better switching ripple attenuation. The robust deadbeat control law is derived for the current loop, with special empha...

In this paper, a new transformerless buck-boost converter based on ZETA converter is introduced. The proposed converter has the ZETA converter advantages such as, buck-boost capability and input to output DC insulation. The suggested converter voltage gain is higher than the classic ZETA converter. In the presented converter, only one main switch is utilized. The proposed converter offers low v...

This paper presents a new integral control law for a boost converter that ensures the stability of large-signal operation. The integral controller is derived in two steps by means of passivitybased control theory. First, a static law, which ensures global stability, is obtained. Secondly, a combination of the storage function of this static law and a new positive semidefinite storage function r...

The stability issue of a single-phase two-stage grid-connected photovoltaic system is complicated due to the nonlinear v-i characteristic of the photovoltaic array as well as the interaction between power converters. Besides, even though linear system theory is widely used in stability analysis of balanced three-phase systems, the application of the same theory to single-phase systems meets ser...

Negative impedance converters (NICs) have been proposed as structures to improve the performance of RF circuits and electrically small antennas. However, NICs suffer from stability problems. This paper presents a compact procedure to analyze the stability of NICs. Then, the required and sufficient conditions to predict the stability of a negative impedance converter are given. These conditions ...

Frequency-domain stability criteria are developed for converter-based power systems with any number of converters. The converters may be grid following or forming, and the can an ac hybrid ac-dc network. network all modeled in a common (stationary) reference frame based on small-signal sequence immittances. Coupling over frequency coupling considered most general form. For each type systems, fr...

Power electronics based power distribution systems (PEDSs) can offer excellent load regulation, transient performance, and, with proper architecture, a high degree of fault tolerance. They are excellent candidates in power distribution systems that need to be fullyor semi-autonomous. Typical applications include ships [1], submarines [1], aircraft [2, 3], and spacecraft [4]. Unfortunately, PEDS...

The purpose of this paper is to apply the Immersion & Invariance and Passivitybased Control to a dc-dc power converter driving a nonlinear load. Experimental results are shown in order to evaluate the performance of the proposed control techniques. Another goal is to find a model for a dc microgrid (load sharing problem) and to show some stability issues.