Large-disturbance Stability Analysis of DC Microgrid with Constant Power Load and its Transient Voltage Stability Control Strategy

2018 ◽  
Author(s):  
Li Zekun ◽  
Pei Wei ◽  
Kong Li
Keyword(s):  
Stability Analysis ◽  
Control Strategy ◽  
Voltage Stability ◽  
Stability Control ◽  
Constant Power ◽  
Dc Microgrid ◽  
Power Load ◽  
Voltage Stability Control ◽  
Constant Power Load ◽  
Large Disturbance

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.

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.

Active stabilisation design of DC–DC converters with constant power load using a sampled discrete‐time model: stability analysis and experimental verification

2018 ◽  
Vol 11 (9) ◽  
pp. 1519-1528 ◽  
Author(s):  
Roghayeh Gavagsaz‐Ghoachani ◽  
Louis‐Marie Saublet ◽  
Matheepot Phattanasak ◽  
Jean‐Philippe Martin ◽  
Babak Nahid‐mobarakeh ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Discrete Time ◽  
Experimental Verification ◽  
Constant Power ◽  
Time Model ◽  
Model Stability ◽  
Discrete Time Model ◽  
Power Load ◽  
Constant Power Load
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