Conservative power theory application in shunt active power filtering under asymmetric voltage

2014 ◽  
Author(s):  
Constantin Vlad Suru ◽  
Cristina Alexandra Patrascu ◽  
Mihaela Popescu ◽  
Alexandru Bitoleanu
Keyword(s):  
Active Power ◽  
Power Theory ◽  
Theory Application ◽  
Conservative Power Theory ◽  
Conservative Power

scholarly journals On Adaptive Moving Average Algorithms for the Application of the Conservative Power Theory in Systems with Variable Frequency

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1201
Author(s):  
Daniel dos Santos Mota ◽  
Elisabetta Tedeschi
Keyword(s):  
Time Delay ◽  
Moving Average ◽  
Voltage Source ◽  
Moving Averages ◽  
Nonlinear Load ◽  
Power Theory ◽  
Variable Time Delay ◽  
Variable Time ◽  
Conservative Power Theory ◽  
Conservative Power

The Conservative Power Theory (CPT) emerged in recent decades as a theoretical framework for coping with harmonically distorted and unbalanced electric networks of ac power systems with a high participation of converter interfaced loads and generation. The CPT measurements are intrinsically linked to moving averages (MA) over one period of the grid. If the CPT is to be used in a low-inertia isolated-grid scenario, which is subjected to frequency variations, adaptive moving averages (AMA) are necessary. This paper reviews an efficient way of computing MAs and turns it into an adaptive one. It shows that an easily available variable time delay block, from MATLAB, causes steady-state errors in the measurements when the grid frequency varies. A new variable time delay block is, thus, proposed. Nonetheless, natural pulsations in the instantaneous power slip through MAs when the discrete moving average window does not fit perfectly the continuously varying period of the grid. A method consisting of weighing two MAs is reviewed and a new and effective hybrid AMA is proposed. The CPT transducers with the different choices of AMAs are compared via computer simulations of a single-phase voltage source feeding either a linear or a nonlinear load.

Power management algorithm for a conservative power theory battery storage based multi‐functional three phase grid connected PV inverter

2020 ◽  
Vol 30 (11) ◽  
Author(s):  
Venkata Subrahmanya Raghavendra Var Oruganti ◽  
Venkata Samba Sesha Siva Sarma Dhanikonda ◽  
Ali Mortezaei ◽  
Tiago Davi Curi Busarello ◽  
Marcelo Godoy Simões
Keyword(s):  
Power Management ◽  
Battery Storage ◽  
Power Theory ◽  
Management Algorithm ◽  
Pv Inverter ◽  
Three Phase ◽  
Conservative Power Theory ◽  
Conservative Power
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