Hybrid Modulation Strategy for Eliminating Low-Frequency Neutral-Point Voltage Oscillations in Z-Source NPC Three-Level Inverter

2018 ◽  
Author(s):  
Hongchao Liu ◽  
Alian Chen ◽  
Jie Chen ◽  
Chunshui Du ◽  
Chenghui Zhang
Keyword(s):  
Low Frequency ◽  
Neutral Point ◽  
Hybrid Modulation

scholarly journals Control System Development for the Three-Ports ANPC Converter

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3967 ◽  
Author(s):  
Silvio Antonio Teston ◽  
Kaio Vinicius Vilerá ◽  
Marcello Mezaroba ◽  
Cassiano Rech
Keyword(s):  
Control System ◽  
Single Phase ◽  
System Development ◽  
Phase 1 ◽  
Storage System ◽  
Low Frequency ◽  
Energy Storage System ◽  
Neutral Point ◽  
Battery Life ◽  
Current Ripple

This paper proposes a control system for the single-phase Three-Ports Active Neutral- Point-Clamped (ANPC-3P) converter, which can inject a sinusoidal current into the grid, balance the neutral point voltage, and regulate the energy storage system (ESS) current with reduced low-frequency ripple. Despite other applications, ANPC-3P inverter can be used in grid-tied renewable generation to allow the simultaneous connection of a photovoltaic (PV) energy source and an ESS to the AC grid. The ESS is connected directly to the inverter circuit without any auxiliary DC-DC converter, but due to the DC bus pulsed power, it can be subjected to low-frequency current ripple. This undesired current ripple is difficult to filter and can lead to shorter battery life. A control system based on well-known controllers is analyzed and designed. Theoretical analysis is validated experimentally using a single-phase 1-kW prototype.

Elimination of Low-Frequency Ripples and Regulation of Neutral-Point Voltage in Stacked Multicell Converters

2017 ◽  
Vol 32 (1) ◽  
pp. 164-175 ◽  
Author(s):  
Amer M. Y. M. Ghias ◽  
Josep Pou ◽  
Pablo Acuna ◽  
Salvador Ceballos ◽  
Alireza Heidari ◽  
...  
Keyword(s):  
Low Frequency ◽  
Neutral Point

Hysteresis Control 3-Level SI-NPC Inverter with Wind Energy System

2017 ◽  
Vol 8 (4) ◽  
pp. 1764
Author(s):  
Palanisamy R
Keyword(s):  
Wind Energy ◽  
Low Frequency ◽  
Clean Energy ◽  
Energy System ◽  
Power Source ◽  
Current Control ◽  
Neutral Point ◽  
Control Technique ◽  
Hysteresis Current Control ◽  
Primary Power

The system is a 3-level Neutral point clamped hysteresis current controlled Inverter with Wind energy as power source. The input DC Power for the multi-level inverter is drawn from wind turbine generator connected through a rectifier circuit. An inductor has been introduced for smoothening the DC output from the rectifier. The inverter uses Neutral Point Clamped topology. The switching pulses for the inverter are achieved by hysteresis current control technique. This system is advantageous over the conventional SPWM based system as the hysteresis current control allows to reduce the low frequency harmonics while also allowing to control the fundamental amplitude depending on frequency. The outputs for the system are verified using MATLAB simulations. The hardware for Hysteresis current control for the inverter is implemented by using a dSPIC microcontroller. The proposed system can be implemented in households for supplying backup power in case of power shortage and can also be used as a primary power source if wind flow is abundant. It is easy to implement, economical and provides clean energy

A Comprehensive Study of a Hybrid Modulation Technique for the Neutral-Point-Clamped Converter

2009 ◽  
Vol 56 (2) ◽  
pp. 294-304 ◽  
Author(s):  
Jordi Zaragoza ◽  
Josep Pou ◽  
Salvador Ceballos ◽  
Eider Robles ◽  
Pedro Ibanez ◽  
...  
Keyword(s):  
Neutral Point ◽  
Modulation Technique ◽  
Hybrid Modulation ◽  
Clamped Converter ◽  
Comprehensive Study
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