Intra-minutes technical impacts of PV grid integration on distribution network operation of a rural community under extreme PV power delivery

Azab, Mohamed

doi:10.1007/s12667-018-0307-7

Cited by 4 publications

(3 citation statements)

References 92 publications

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“…The instantaneous active and reactive powers (P and Q) injected to the grid are computed as follows [21,22,78]:…”

Section: Prediction Of Active and Reactive Powermentioning

confidence: 99%

High performance decoupled active and reactive power control for three-phase grid-tied inverters using model predictive control

Azab

2021

Prot Control Mod Power Syst

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Finite control set-model predictive control (FCS-MPC) is employed in this paper to control the operation of a three-phase grid-connected string inverter based on a direct PQ control scheme. The main objective is to achieve high-performance decoupled control of the active and reactive powers injected to the grid from distributed energy resources (DER).The FCS-MPC scheme instantaneously searches for and applies the optimum inverter switching state that can achieve certain goals, such as minimum deviation between reference and actual power; so that both power components (P and Q) are well controlled to their reference values.In addition, an effective method to attenuate undesired cross coupling between the P and Q control loops, which occurs only during transient operation, is investigated. The proposed method is based on the variation of the weight factors of the terms of the FCS-MPC cost function, so a higher weight factor is assigned to the cost function term that is exposed to greater disturbance. Empirical formulae of optimum weight factors as functions of the reference active and reactive power signals are proposed and mathematically derived. The investigated FCS-MPC control scheme is incorporated with the LVRT function to support the grid voltage in fulfilling and accomplishing the up-to-date grid codes. The LVRT algorithm is based on a modification of the references of active and reactive powers as functions of the instantaneous grid voltage such that suitable values of P and Q are injected to the grid during voltage sag.The performance of the elaborated FCS-MPC PQ scheme is studied under various operating scenarios, including steady-state and transient conditions. Results demonstrate the validity and effectiveness of the proposed scheme with regard to the achievement of high-performance operation and quick response of grid-tied inverters during normal and fault modes.

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“…The instantaneous active and reactive powers (P and Q) injected to the grid are computed as follows [21,22,78]:…”

Section: Prediction Of Active and Reactive Powermentioning

confidence: 99%

High performance decoupled active and reactive power control for three-phase grid-tied inverters using model predictive control

Azab

2021

Prot Control Mod Power Syst

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“…The instantaneous active and reactive power can be predicted at the sample (k + 1) based on (6) and (7) for a prediction horizon of one sampling period [1,7,27,39]. Thus, P and Q at the sample (k + 1) are given by…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Owing to (15) the grid current can be predicted one step ahead (at sample period k + 1) as a function of grid voltage, inverter output voltage and grid current at the present sample ( k ) [1, 26–28, 31, 38]

i_{normalg}^{k + 1} = i_{normalg}^{k} ()(, 1 - T_{normalS} \frac{R_{normalS}}{L_{normalS}}) + \frac{T_{normalS}}{L_{normalS}} (v_{AB} - e_{g}) .

Therefore, resolving (4) into α−β components in the stationary reference frame yields the following relations:

i_{α}^{k + 1} = i_{α}^{k} ()(, 1 - T_{normalS} \frac{R_{normalS}}{L_{normalS}}) + \frac{T_{normalS}}{L_{normalS}} (v_{normalinv α} - e_{α}),

i_{β}^{k + 1} = i_{β}^{k} ()(, 1 - T_{normalS} \frac{R_{normalS}}{L_{normalS}}) + \frac{T_{normalS}}{L_{normalS}} (v_{normalinv β} - e_{β}) .

The instantaneous active and reactive power can be predicted at the sample ( k + 1) based on (6) and (7) for a prediction horizon of one sampling period [1, 7, 27, ...…”

Section: Concept Of Instantaneous Pq Control Using Fcs–mpcmentioning

confidence: 99%

Performance of model predictive control approach for single‐phase distributed energy grid integration with PQ control

Azab

2019

IET Energy Systems Integration

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This study investigates the performance of finite control set-model predictive control (FCS-MPC) strategy employed for the control of active (P) and reactive power (Q) injected to the grid from a distributed energy resource using a single-phase grid-tied inverter. In the study, three different computational methods are utilised to create the orthogonal components of grid current and voltage in the stationary reference frame that are required for PQ computations. The obtained results indicate that FCS-MPC approach is effective to provide flexible control of the power injected to the grid. Moreover, the steady state and transient performance of P and Q components are affected by the method of creating the imaginary quadrature component. Owing to the results, the second-order generalised integrator method provides the best steady state performance in terms of the lowest total harmonic distortion of grid current and minimum resultant peak-peak power ripple. While the quarter cycle phase delay method results in the worst transient behaviour owing to an unavoidable time delay of 0.005 s in case of 50 Hz supply system. In addition, the robustness of the FCS-MPC system is examined against parameters variation over a wide range. The overall FCS-MPC system is studied using PSIM ® software.

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A new method for online evaluation of the effects of PV panels and comparison with MVDI in electrical power distribution networks

Zadehbagheri

Kiani

2023

Renewable Energy Focus

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Intra-minutes technical impacts of PV grid integration on distribution network operation of a rural community under extreme PV power delivery

Cited by 4 publications

References 92 publications

High performance decoupled active and reactive power control for three-phase grid-tied inverters using model predictive control

High performance decoupled active and reactive power control for three-phase grid-tied inverters using model predictive control

Performance of model predictive control approach for single‐phase distributed energy grid integration with PQ control

A new method for online evaluation of the effects of PV panels and comparison with MVDI in electrical power distribution networks

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