scholarly journals Advanced Multilevel Converters with DC Capacitors - Modulation, Voltage Balancing, and Control Strategies

2019 ◽  
Keyword(s):  
Control Strategies ◽  
Multilevel Converters ◽  
Voltage Balancing ◽  
And Control ◽  
Modulation Voltage

scholarly journals Hybrid Multilevel Converters: Topologies, Evolutions and Verifications

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 615 ◽  
Author(s):  
Jianzhong Zhang ◽  
Shuai Xu ◽  
Zakiud Din ◽  
Xing Hu
Keyword(s):  
High Voltage ◽  
Control Strategies ◽  
Multilevel Converter ◽  
Power Devices ◽  
Multilevel Converters ◽  
Voltage Balancing ◽  
In Series ◽  
Good Potential ◽  
And Control ◽  
Balancing Control

Multilevel converters have good potential in high power and high voltage applications due to their advantages of reduced voltage or current stress on power devices. In recent years, hybrid multilevel converter (HMC) have attracted increasing attention since less equipment is required. In this paper, the topologies and evolutions of HMCs are presented, where five topology derivation ways are given by using basic cells in series-parallel/parallel-series. Some general topologies or structures that are used to generate higher levels are also deducted. Then many existing HMCs can be derived, and new topologies of the HMC might be inspired. The capabilities of neutral point and FC voltage balancing control are investigated. The performance of the selected FC-based HMCs is analyzed. Finally, the verifications of operation principle and control strategies for the derived HMCs are carried out.

scholarly journals Performance Analysis and control strategies of Cascaded Multilevel Converters

2019 ◽  
pp. 327-336
Author(s):  
Polu Veera Pratap ◽  
S. Sridhar
Keyword(s):  
Performance Analysis ◽  
High Voltage ◽  
High Power ◽  
Control Strategies ◽  
Multilevel Inverter ◽  
Multilevel Converters ◽  
Matlab Simulink ◽  
Multilevel Inverters ◽  
And Control ◽  
Gate Drives

Multilevel inverters have been widely used for high-voltage and high-power applications. Their perf0rmance is greatly superi0r t0 that 0f c0nventi0nal tw0-level inverters due t0 their reduced t0tal harm0nic dist0rti0n (THD),. This t0p0l0gy requires fewer c0mp0nents when c0mpared t0 di0de clamped, flying capacit0r and Bridgeless cascaded inverters and it requires fewer carrier signals and gate drives. Theref0re, the 0verall c0st and circuit c0mplexity are greatly reduced. This paper presents a n0vel reference and multicarrier based PWM scheme It als0 c0mpares the perf0rmance 0f the pr0p0sed scheme with that 0f c0nventi0nal cascaded bridge less rectifier (CBR) multilevel inverters. finally Simulati0n results fr0m MATLAB/SIMULINK are presented t0 verify the perf0rmance 0f the Five-level Multilevel Inverter

Effective infection prevention and control strategies in a large accredited psychiatric facility in Singapore

2020 ◽  
Author(s):  
Daniel Poremski ◽  
Sandra Henrietta Subner ◽  
Grace Lam Fong Kin ◽  
Raveen Dev Ram Dev ◽  
Mok Yee Ming ◽  
...  
Keyword(s):  
Mental Health ◽  
Prevention And Control ◽  
Infection Prevention ◽  
Control Strategies ◽  
Infection Prevention And Control ◽  
Psychiatric Facility ◽  
Essential Services ◽  
Community Transmission ◽  
And Control

The Institute of Mental Health in Singapore continues to attempt to prevent the introduction of COVID-19, despite community transmission. Essential services are maintained and quarantine measures are currently unnecessary. To help similar organizations, strategies are listed along three themes: sustaining essential services, preventing infection, and managing human and consumable resources.

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