A Carrier-Based PWM Strategy With the Offset Voltage Injection for Single-Phase Three-Level Neutral-Point-Clamped Converters

2013 ◽  
Vol 28 (3) ◽  
pp. 1083-1095 ◽  
Author(s):  
Wensheng Song ◽  
Xiaoyun Feng ◽  
Keyue Ma Smedley
Keyword(s):  
Single Phase ◽  
Neutral Point ◽  
Offset Voltage

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.

10kV Grid Arc Grounding Over-Voltage Hazards and Countermeasures

2013 ◽  
Vol 392 ◽  
pp. 489-493
Author(s):  
Qing Hao Wang ◽  
Zi Jun Huang ◽  
Zhi Gang Li ◽  
Bo Fang ◽  
Gui Bin Hu
Keyword(s):  
Single Phase ◽  
Power Grid ◽  
Operation Mode ◽  
Scientific Basis ◽  
Neutral Point ◽  
Correct Selection ◽  
Capacitive Current ◽  
Current Test ◽  
Selection Of

Through the analysis of 2 single-phase grounding over voltage accidents caused by capacitive over current in 10 kV power grid in this paper, the causes and damages of arc grounding over voltage are illustrated, and the necessity of capacitive current test and effective methods are pointed out. The test and assessment to the 29 substations capacitor currents provides a scientific basis for the correct selection of the neutral point operation mode, and the strengths and weaknesses of the neutral Point grounding through the arc suppression circle and the mode trends of 10kV grid neutral grounding are demonstrated.

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