Hysteresis current control with distributed shoot‐through states for impedance source inverters

Abstract

This paper presents a hysteresis current control technique with shoot-through states distribution. This control algorithm could be applied to three-level and multi-level inverters with any impedance source network where reference current control signal along with shoot-through states are required. Possible modifications of the presented algorithm are discussed. The steady-state analysis was made to explain the operation principle of the algorithm. As a result, the link between the band ratio of the hysteresis current controller, the input voltage, and the desired DC-link voltage was obtained. All theoretical predictions were proved by simulation and experimental results. Future applications are discussed.Hysteresis current control, which is based on the current reference signal, is often used in traditional CSI and voltage source inverter solutions [32][33][34][35][36][37]. In addition, several approaches for multilevel converters are described in [38,39]. Commonly, hysteresis control is preferable because of simplicity, fast deadbeat transient response, and overcurrent protection. But it is difficult to implement it in the system with shoot-through states.This paper proposes a novel hysteresis current control for a single-phase inverter based on any IS network with distributed shoot-through states. Section 2 explains the novel algorithm in detail. The steady-state analysis is presented in Section 3. Section 4 describes the simulation along with experimental results. Finally, conclusions are presented in Section 5. This paper is based on earlier preliminary publication [40] and includes a comprehensive theoretical analysis and experimental results; however, it is not presented there.

A simple unit cell structure for an efficient sketch of series‐connected multilevel inverters

“…In this structure, the overall output voltage magnitude is determined based on equation (1). Deploying identical DC sources, the general n-level output voltage waveform is displayed in Figure 4.…”

“…An inverter is a power electronics device that affords the conversion of direct current (DC) to an alternative current (AC) [1,2]. Also, this device is apt to effectively tune the desired magnitudes and also the required frequencies in the generated waveforms.…”

A novel modulation technique with interleaved‐and‐shifted shoot‐through state placement for quasi‐Z‐source inverters

“…In addition, the qZSI has the saliently attractive characteristics, such as lower component stresses and switching ripple to PV panel, a continuous current drawing from the PV source thus extra filtering capacitors can be saved, and a common dc rail between the source and inverter. 31 proposes a novel hysteresis current control for a single-phase inverter based on any impedance source network with distributed shootthrough states (STSs). The first is the topology modification, extension, or size miniaturization to reduce the bulk and cost or obtain a larger boost ratio for more field applications.…”

“…The second is the improvement in modeling and modulation control methods to achieve higher performance, reliability and efficiency, or more usable shoot-through range to reach a greater boost ratio. [28][29][30][31][32][33][34][35] In, 28 the modeling of dynamic characteristics for the qZS network was studied by small-signal analysis. Then, a 2-stage control method for both output voltage control and current control modes, based on the dynamical model, has been proved.…”

Three-phase T-type qZ source inverter with control current associated to a vectorial modulator for photovoltaic applications

“…Other solutions based on current controller have also been proposed. A hysteresis current control for Z and quasi-Z voltage source inverters was also proposed [20,21]. However, this technique was also applied to the two-level single-phase inverter.…”