scholarly journals Power Calculation Algorithm for Single-Phase

2018 ◽  
Vol 1 (16) ◽  
pp. 19-24
Author(s):  
J. El Mariachet ◽  
◽  
J. Matas ◽  
Helena Martín ◽  
Abdullah Abusorrah
Keyword(s):  
Single Phase ◽  
Power Calculation ◽  
Calculation Algorithm

scholarly journals HIL-Assessed Fast and Accurate Single-Phase Power Calculation Algorithm for Voltage Source Inverters Supplying to High Total Demand Distortion Nonlinear Loads

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1643
Author(s):  
Jorge El Mariachet ◽  
Yajuan Guan ◽  
Jose Matas ◽  
Helena Martín ◽  
Mingshen Li ◽  
...  
Keyword(s):  
Steady State ◽  
Single Phase ◽  
Reactive Power ◽  
Dynamic Performance ◽  
Active Power ◽  
Voltage Source ◽  
Power Calculation ◽  
Calculation Algorithm ◽  
Nonlinear Loads ◽  
Voltage Source Inverters

The dynamic performance of the local control of single-phase voltage source inverters (VSIs) can be degraded when supplying to nonlinear loads (NLLs) in microgrids. When this control is based on the droop principles, a proper calculation of the active and reactive averaged powers (P–Q) is essential for a proficient dynamic response against abrupt NLL changes. In this work, a VSI supplying to an NLL was studied, focusing the attention on the P–Q calculation stage. This stage first generated the direct and in-quadrature signals from the measured load current through a second-order generalized integrator (SOGI). Then, the instantaneous power quantities were obtained by multiplying each filtered current by the output voltage, and filtered later by utilizing a SOGI to acquire the averaged P–Q parameters. The proposed algorithm was compared with previous proposals, while keeping the active power steady-state ripple constant, which resulted in a faster calculation of the averaged active power. In this case, the steady-state averaged reactive power presented less ripple than the best proposal to which it was compared. When reducing the velocity of the proposed algorithm for the active power, it also showed a reduction in its steady-state ripple. Simulations, hardware-in-the-loop, and experimental tests were carried out to verify the effectiveness of the proposal.

scholarly journals A Power Calculation Algorithm for Single-Phase Droop-Operated-Inverters Considering Linear and Nonlinear Loads HIL-Assessed

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1366 ◽  
Author(s):  
Jorge El Mariachet ◽  
Jose Matas ◽  
Helena Martín ◽  
Mingshen Li ◽  
Yajuan Guan ◽  
...  
Keyword(s):  
Single Phase ◽  
System Stability ◽  
Power Calculation ◽  
Parallel Operation ◽  
Calculation Algorithm ◽  
Nonlinear Loads ◽  
Nonlinear Load ◽  
Low Pass ◽  
Dynamic Velocity ◽  
The Stability

The active and reactive powers, P and Q, are crucial variables in the parallel operation of single-phase inverters using the droop method, introducing proportional droops in the inverter output frequency and voltage amplitude references. P and Q, or P-Q, are calculated as the product of the inverter output voltage and its orthogonal version with the output current, respectively. However, when sharing nonlinear loads these powers, Pav and Qav, should be averaged by low-pass filters (LPFs) with a very low cut-off frequency to avoid the high distortion induced by these loads. This forces the droop method to operate at a very low dynamic velocity and degrades the system stability. Then, different solutions have been proposed in literature to increase the system velocity, but only considering linear loads. Therefore, this work presents a method to calculate Pav and Qav using second-order generalized integrators (SOGI) to face this problem with nonlinear loads. A double SOGI (DSOGI) approach is applied to filter the nonlinear load current and provide its fundamental component to the inverter, leading to a faster dynamic velocity of the droop-based load sharing capability and improving the stability. The proposed method is shown to be faster than others in the literature when considering nonlinear loads, while smoothly driving the system with low distortion levels. Simulations, hardware-in-loop (HIL) and experimental results are provided to validate this proposal.

scholarly journals Power calculation algorithm in non-orthogonal multiple access NOMA

2016 ◽  
Vol 19 (4) ◽  
pp. 91-94 ◽  
Author(s):  
Ya.V. Kryukov ◽  
◽  
A.Ya. Demidov ◽  
D.A. Pokamestov ◽  
◽  
...  
Keyword(s):  
Multiple Access ◽  
Power Calculation ◽  
Calculation Algorithm
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