Design and evaluation of voltage control techniques by hierarchical coordination of multiple power converters in low-voltage dc distribution systems

2016 ◽  
Author(s):  
Il-Yop Chung Il-Yop Chung ◽  
Phi Hai Trinh Phi Hai Trinh ◽  
H. Cho ◽  
Ju-Yong Kim Ju-Yong Kim ◽  
Jin-Tae Cho Jin-Tae Cho ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Power Converters ◽  
Low Voltage ◽  
Voltage Control ◽  
Control Techniques ◽  
Dc Distribution ◽  
Multiple Power

scholarly journals A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

Energies ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 41 ◽  
Author(s):  
Trinh Hai ◽  
Hector Cho ◽  
Il-Yop Chung ◽  
Hyun-Koo Kang ◽  
Jintae Cho ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Low Voltage ◽  
Voltage Control ◽  
Multi Agent Systems ◽  
Agent Systems ◽  
Dc Distribution ◽  
Control Scheme ◽  
Multi Agent

scholarly journals Design and Testing of a Low Voltage Solid-State Circuit Breaker for a DC Distribution System

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 338
Author(s):  
Leslie Tracy ◽  
Praveen Kumar Sekhar
Keyword(s):  
Solid State ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Low Voltage ◽  
Circuit Breaker ◽  
Solid State Circuit ◽  
Dc Distribution ◽  
High Side ◽  
Solid State Circuit Breaker

In this study, a low voltage solid-state circuit breaker (SSCB) was implemented for a DC distribution system using commercially available components. The design process of the high-side static switch was enabled through a voltage bias. Detailed functional testing of the current sensor, high-side switch, thermal ratings, analog to digital conversion (ADC) techniques, and response times of the SSCB was evaluated. The designed SSCB was capable of low-end lighting protection applications and tested at 50 V. A 15 A continuous current rating was obtained, and the minimum response time of the SSCB was nearly 290 times faster than that of conventional AC protection methods. The SSCB was implemented to fill the gap where traditional AC protection schemes have failed. DC distribution systems are capable of extreme faults that can destroy sensitive power electronic equipment. However, continued research and development of the SSCB is helping to revolutionize the power industry and change the current power distribution methods to better utilize clean renewable energy systems.

Equal Loading Rate Based Master–Slave Voltage Control for VSC Based DC Distribution Systems

2020 ◽  
Vol 35 (5) ◽  
pp. 2252-2259
Author(s):  
Yizhen Wang ◽  
Jinwei He ◽  
Yuming Zhao ◽  
Guowei Liu ◽  
Jie Sun ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Loading Rate ◽  
Voltage Control ◽  
Dc Distribution

Control and fault analysis of multiport converters for low voltage DC distribution systems

2021 ◽  
Vol 124 ◽  
pp. 106335
Author(s):  
Simone Negri ◽  
Enrico Tironi ◽  
Gabrio Superti-Furga ◽  
Giovanni Ubezio
Keyword(s):  
Distribution Systems ◽  
Low Voltage ◽  
Fault Analysis ◽  
Dc Distribution

scholarly journals Coordinated hierarchical voltage control for flexible DC distribution systems

2022 ◽  
Vol 202 ◽  
pp. 107572
Author(s):  
Zhiyu Wei ◽  
Ke Peng ◽  
Chuanliang Xiao ◽  
Yan Li ◽  
Xueshen Zhao ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Voltage Control ◽  
Dc Distribution

scholarly journals DC-Link Voltage Control of a Grid-Connected Solar Photovoltaic System for Fault Ride-Through Capability Enhancement

2019 ◽  
Vol 9 (5) ◽  
pp. 952 ◽  
Author(s):  
S. Mohamed ◽  
P. Jeyanthy ◽  
D. Devaraj ◽  
M. Shwehdi ◽  
Adel Aldalbahi
Keyword(s):  
Power Converters ◽  
Reactive Power ◽  
Low Voltage ◽  
Voltage Control ◽  
Maximum Power ◽  
Solar Photovoltaic ◽  
Maximum Power Point ◽  
Control Scheme ◽  
Mppt Controller ◽  
Power Point

The high penetration level of solar photovoltaic (SPV) generation systems imposes a major challenge to the secure operation of power systems. SPV generation systems are connected to the power grid via power converters. During a fault on the grid side; overvoltage can occur at the direct current link (DCL) due to the power imbalance between the SPV and the grid sides. Subsequently; the SPV inverter is disconnected; which reduces the grid reliability. DC-link voltage control is an important task during low voltage ride-through (LVRT) for SPV generation systems. By properly controlling the power converters; we can enhance the LVRT capability of a grid-connected SPV system according to the grid code (GC) requirements. This study proposes a novel DCL voltage control scheme for a DC–DC converter to enhance the LVRT capability of the two-stage grid-connected SPV system. The control scheme includes a “control without maximum power point tracking (MPPT)” controller; which is activated when the DCL voltage exceeds its nominal value; otherwise, the MPPT control is activated. Compared to the existing LVRT schemes the proposed method is economical as it is achieved by connecting the proposed controller to the existing MPPT controller without additional hardware or changes in the software. In this approach, although the SPV system will not operate at the maximum power point and the inverter will not face any over current challenge it can still provide reactive power support in response to a grid fault. A comprehensive simulation was carried out to verify the effectiveness of the proposed control scheme for enhancing the LVRT capability and stability margin of an interconnected SPV generation system under symmetrical and asymmetrical grid faults.

Line Losses and Power Capacity in Low Voltage AC and DC Distribution Systems: a Numerical Comparative Study

2021 ◽  
Author(s):  
Leonardo Nozari da Silva ◽  
Gustavo Scherer Djambolakdjian ◽  
Bruno Alves de Andrade ◽  
Cassiano Souza Krenn ◽  
Larissa Ananda Hansen ◽  
...  
Keyword(s):  
Comparative Study ◽  
Distribution Systems ◽  
Low Voltage ◽  
Power Capacity ◽  
Dc Distribution
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