THD Improvement for a Multilevel DC-Link Inverter with Variable DC Voltage Sources
- Resource Type
- Conference
- Authors
- Alhassan, Mohammad; Singh, Santosh K.
- Source
- 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) Power Electronics, Drives and Energy Systems (PEDES), 2022 IEEE International Conference on. :1-6 Dec, 2022
- Subject
- Components, Circuits, Devices and Systems
Power, Energy and Industry Applications
Pulse generation
Modulation
Prototypes
Logic gates
Inverters
Hardware
Solar panels
Multilevel DC-Link Inverter
Renewable Energy System
Simplified Gate Pulse Generation
Modified Nearest Level Modulation
- Language
The Multilevel DC-Link Inverter (MLDCLI) is an important interface between solar panels and residential AC supply systems. In this paper, a MLDCLI using three asymmetric DC sources is designed to get a 15-level output voltage. This converter is controlled using a Simplified Gate Pulse Generation (SGPG) technique. Further, modified Nearest Level Modulation (mNLM) is applied to improve THD if there is a change in the ratio of DC voltage sources. To get the best value for THD, the gradient angles automatically change when the voltage in one of the DC sources changes. The results were verified using MATLAB and followed by experiments on a hardware prototype.