Potential for Increased Rural Electrification Rate in Sub-Saharan Africa using SWER Power Distribution Networks

Irechukwu, Michael E.; Mushi, Aviti

doi:10.52339/tjet.v39i2.707

Cited by 7 publications

(6 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In UPQC, two significant types of APF are shunt APF and series APF, as stated in [5,6]. The shunt APF is the most effective in addressing current-related issues, while the series APF is the most appropriate for mitigating voltage-related problems.…”

Section: Need Of Power Quality In Upqcmentioning

confidence: 99%

ANFIS Controlled MMC-UPQC to Mitigate Power Quality Problems in Solar PV Integrated Power System

Rajesh Garikapati,

S. Ramesh Kumar,

N. Karthik

2023

ARASET

View full text Add to dashboard Cite

This paper focuses on the implementation of a Modular Multilevel Converter (MMC) based Unified Power Quality Conditioner (UPQC) in a grid-integrated Photovoltaic (PV) system. The integration of photovoltaic (PV) systems into the grid brings numerous benefits in terms of renewable energy utilization like sustainable energy generation, energy security, grid resilience, and economic growth. However, the voltage source converters (VSCs) employed in PV systems can introduce power quality (PQ) issues, including voltage fluctuations, harmonics, and reactive power imbalances and grid instability. The objective of this work is to enhance power quality by mitigating voltage and current fluctuations and harmonics generated due to VSC, compensating reactive power requirements by the load and PV system, and regulating the DC link voltage. For DC voltage regulation, an Adaptive Neuro-Fuzzy Inference System (ANFIS) controller is employed to control for MMC-UPQC. The proposed control strategy is simulated using MATLAB/SIMULINK software and the results are compared with conventional Proportional Integral (PI) and fuzzy controllers. Various dynamic conditions such as voltage sag and swell at the point of common coupling (PCC), changes in irradiance for the PV system, and load variations are considered. The simulation results demonstrate that the ANFIS-controlled MMC-based UPQC outperforms the PI and fuzzy controllers in terms of power quality improvement. It effectively suppresses harmonics, maintains a stable DC link voltage, and compensates for reactive power fluctuations. The proposed control strategy provides superior performance and achieves better power quality compared to conventional controllers. The findings of this work highlight the potential of using an ANFIS controller in MMC-based UPQC systems for grid-integrated PV systems.

show abstract

Section: Need Of Power Quality In Upqcmentioning

confidence: 99%

ANFIS Controlled MMC-UPQC to Mitigate Power Quality Problems in Solar PV Integrated Power System

Rajesh Garikapati,

S. Ramesh Kumar,

N. Karthik

2023

ARASET

View full text Add to dashboard Cite

show abstract

“…This can be partly attributed to poor converter designs, which primarily result in inefficient power conversion. However, Sub-Saharan African (SSA) nations continue to have slow electrification rates (Irechukwu & Mushi, 2020). The situation is made even worse when accounting for the lack of prevalence of hybrid renewable energy systems in islands.…”

Section: Introductionmentioning

confidence: 99%

MPPT DC-DC Buck-Boost Converter for Off Grid Hybrid Solar-Wind-Battery System in Ikuza Island, Tanzania

Nassoro,

Msigwa,

Mushi

et al. 2023

TJET

View full text Add to dashboard Cite

Ikuza Island in Tanzania faces lack of electricity. Therefore, this paper undertakes to design hybrid renewable energy sources for the island by specifically focusing on the buck-boost converter for the energy conversion from these renewable resources. The design of the bidirectional buck-boost converter for maximum power point tracking in off-grid hybrid renewable energy systems is multifaceted due to the inhomogeneity nature of the renewable energy sources. The bidirectional buck-boost converter, solar PV, wind-based generator, and energy storage system were designed and simulated in MATLAB/Simulink software. The designed system was tested with varying solar irradiance (750 to 1000 W/m2), temperature (20 to 25°C) and wind speed (150 to 157.5 radians/s) at constant load of 260 A while load variation involved varying the load current from 0 to 260 A at solar irradiance, temperature, and wind speed of 1000 W/m2, 25 °C and 157.5 radians/s, respectively. The variation of DC link bus voltage at different load conditions was reported. The simulation results show that the designed converter is able to maintain DC link voltage at 600 V. Moreover, the DC link voltage showed a maximum drop of approximately 0.67% during the constant load condition. Contrarily, a significant improvement is observed when the designed converter operates with the hybrid system of solar PV, PMSG-based wind generator and with energy storage system.

show abstract

“…The design of these feeders is mainly radial topology. Due to the nature of dispersed and scattered load centers (towns) in Tanzania [1], the feeders have to run over long routes, such as the 180 km 33 kV Shinyanga-Bariadi line [2]. The feeder runs all this distance without any voltage control compensators; thus at the receiving end, it suffers a voltage drop of more than 7%.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of DSTATCOM for 180 km 33 kV Feeder from Shinyanga to Bariadi in Tanzania

Mhagama

Mushi²,

Kundy

2022

Preprint

View full text Add to dashboard Cite

This article presents the performance evaluation of distribution static compensators (DSTATCOM) for the 180 km 33 kV line from Shinyanga to Bariadi in Tanzania. First, the voltage drop existing on the line is explained, and its negative consequences are mentioned. Secondly, the 180 km line is presented in the nominal 𝜋 model. Then, DSTATCOM capacitive and inductive dynamic ranges of ±1900 kVAr are calculated based on the system fault level. Using the energy storage of five cycles, a DC capacitor with a value of 0.19 mF is calculated. The DSTATCOM is designed using the voltage source converters (VSC) employing the neutral point clamped (NPC) topology. A proportional integral (PI) control algorithm was implemented to the DSTATCOM. Simulation of the modeled system of the feeder with DSTATCOM is carried out in MATLAB/Simulink environment for different loading conditions (light and heavy loading) to evaluate the steady-state performance. Simulation results reveal that for the light load of 0.45 MW, the receiving end voltage is 37.2 kV RMS and 31.5 kV RMS, before and after application of DSTATCOM, respectively. For the heavy load of 4.5 MW, the results are 28.45 kV RMS and 33.1 kV RMS, before and after application of DSTATCOM, respectively. The frequency-domain analysis reveals a gain margin of infinity implying stable system operation. The Nyquist plot shows no encirclement of the negative one point, further verifying the stability. It is concluded that the proposed DSTATCOM is capable of keeping both the voltage drop and rise of the line at acceptable levels for system stability of the Shinyanga-Bariadi feeder.

show abstract

Potential for Increased Rural Electrification Rate in Sub-Saharan Africa using SWER Power Distribution Networks

Cited by 7 publications

References 44 publications

ANFIS Controlled MMC-UPQC to Mitigate Power Quality Problems in Solar PV Integrated Power System

ANFIS Controlled MMC-UPQC to Mitigate Power Quality Problems in Solar PV Integrated Power System

MPPT DC-DC Buck-Boost Converter for Off Grid Hybrid Solar-Wind-Battery System in Ikuza Island, Tanzania

Performance Evaluation of DSTATCOM for 180 km 33 kV Feeder from Shinyanga to Bariadi in Tanzania

Contact Info

Product

Resources

About