A stability control way of bus voltage in DC microgrid with constant power load

2021 ◽  
Author(s):  
Lihua Wang ◽  
Xiaona Liu ◽  
Xue Ni ◽  
Shaojie Jiang ◽  
Siyuan Liu
Keyword(s):  
Stability Control ◽  
Constant Power ◽  
Dc Microgrid ◽  
Power Load ◽  
Bus Voltage ◽  
Constant Power Load

DC Bus Instability Driving by Photovoltaic Source with Constant Power Load

2013 ◽  
Vol 313-314 ◽  
pp. 853-857 ◽  
Author(s):  
M.N.M. Nasir ◽  
Awang Jusoh ◽  
Alias Khamis
Keyword(s):  
Voltage Stability ◽  
Current Source ◽  
Voltage Source ◽  
Constant Power ◽  
Dc Voltage ◽  
Power Load ◽  
Dc Bus ◽  
Bus Voltage ◽  
Lc Filter ◽  
Constant Power Load

This study presented the DC bus instability in distributed power system driving by Photovoltaic (PV) source with constant power load (CPL). The aim of this study is to investigate the effect of PV source towards the performances of DC bus voltage stability using constant power load. The system first was tested using linear DC supply as voltage source and CPL was modeled and connected to the voltage source through LC filter network. A passive damping circuit was chosen to stabilize the DC bus instability. The system was repeated using PV source. PV array was modeled based on the parameters obtained from a commercial PV data sheet. A circuitry simulation was performed under the similar design excluding the DC source in order to investigate DC bus instability. Results showed that the stability of DC bus become unstable when using linear DC voltage supply and slightly affected when using PV source. The instability phenomenon due to the negative incremental impedance of a constant power load can be overcome by using damping technique. For linear DC voltage source, DC bus voltage system tends to oscillate. However, with PV source which is actually a current source input seems not much affecting the DC bus voltage stability.

A Novel Assorted Nonlinear Stabilizer for DC–DC Multilevel Boost Converter With Constant Power Load in DC Microgrid

2020 ◽  
Vol 35 (10) ◽  
pp. 11181-11192
Author(s):  
Xiangke Li ◽  
Xinan Zhang ◽  
Wentao Jiang ◽  
Junjun Wang ◽  
Peng Wang ◽  
...  
Keyword(s):  
Boost Converter ◽  
Constant Power ◽  
Dc Microgrid ◽  
Power Load ◽  
Constant Power Load

scholarly journals Voltage Regulation of an Isolated DC Microgrid with a Constant Power Load: A Passivity-based Control Design

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2085
Author(s):  
Guillermo Luciano Magaldi ◽  
Federico Martin Serra ◽  
Cristian Hernán de Angelo ◽  
Oscar Danilo Montoya ◽  
Diego Armando Giral-Ramírez
Keyword(s):  
Control Strategy ◽  
Reference Value ◽  
Voltage Regulation ◽  
System Stability ◽  
Constant Power ◽  
Dc Microgrid ◽  
Photovoltaic Array ◽  
Power Load ◽  
Constant Power Load ◽  
Averaged Model

Passivity-based nonlinear control for an isolated microgrid system is proposed in this paper. The microgrid consists of a photovoltaic array and a battery energy storage connected to a point of common converters, supplying a constant power load. The purpose of this control strategy is to maintain the output direct current voltage in its reference value under load variations, improving battery interaction. The system is represented by its state space averaged model and the proposed controller is designed using the interconnection and damping assignment strategy, which allows obtaining controller parameters while ensuring the closed-loop system stability. The unknown constant power load is estimated using an observer based on the energy function of the system. The behavior of the proposed control strategy is validated with simulation and experimental results.

H∞ based control of a DC/DC buck converter feeding a constant power load in uncertain DC microgrid system

2020 ◽  
Vol 105 ◽  
pp. 278-295
Author(s):  
Mahdi Boukerdja ◽  
Aissa Chouder ◽  
Linda Hassaine ◽  
Belkacem Ould Bouamama ◽  
Walid Issa ◽  
...  
Keyword(s):  
Buck Converter ◽  
Constant Power ◽  
Dc Microgrid ◽  
Power Load ◽  
Constant Power Load
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