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Open Access

THEMED ARTICLE: MODELLING, DESIGN, CONTROL, AND IMPLEMENTATION OF ADVANCED ISOLATED DC/DC CONVERTERS FOR RENEWABLE ENERGY APPLICATIONS

ORIGINAL RESEARCH

An integrated charging equalizing converter based on Cuk converter for solar home system

Yihong Liu, Zhenmin Lin, Bin Xu

Version of Record online: 13 December 2023

A solar home system (SHS), containing three independent parts, namely a load voltage dc–dc converter, an energy storage device (ESD) charger, and an ESD equalizer, will become bulky and costly. Thus, based on the Cuk converter, an integrated charging equalizing converter (ICEC) is proposed. The ICEC can achieve load voltage converting, battery/supercapacitor (SC) charging, and equalizing simultaneously. The idea of the ICEC is using a voltage multiplier (VM) to replace the capacitor in Cuk convertor, and then reusing the VM as a charging equalizer. When the Cuk converter is operating, the voltage ripple generated on the VM, which can be regarded as an ac voltage source, is utilized to drive the VM. Therefore, compared with the traditional methods, the charging and equalizing can be achieved without extra switches and magnetic elements.

Open Access

ORIGINAL RESEARCH

A modified control strategy for LCC with IGCT‐based full‐bridge submodules to solve the commutation failure issues

Yindi Liu, Xiangjun Zeng, Yiping Luo, Haitao Qu

Version of Record online: 13 December 2023

The paper proposes a hybrid solution combining the LCC inverter with the continuously controlled IGCT-based full-bridge submodules (FBSMs) to solve the CF issues. The scheme can provide the LCC inverter with an additional commutation area, and compensate for the phase-shift of the grid voltage under faults. With the decoupled control strategies of LCC and FBSMs, the proposed scheme can achieve better control effect and better CF resistance ability with less submodules compared with the existing controllable capacitor scheme.

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