Voltage Dip/Swell Mitigation and Imaginary Power Compensation in Low Voltage Distribution Utilizing Improved Unified Power Quality Conditioner (I-UPQC)

Osaloni, Oluwafunso Oluwole; Saha, Akshay Kumar

doi:10.4028/www.scientific.net/jera.49.84

Cited by 9 publications

(6 citation statements)

References 35 publications

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“…The UPQC can also regulate the flow of active power, reactive power, and voltage-independent power in real time [38]. The UPQC is gaining popularity over STATCOM because it can improve low-and high-voltage ride-through (L\HVRT) better than STATCOM [39,40].…”

Section: B Literature Overviewmentioning

confidence: 99%

Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids

Mahmoud

Atia²,

Esmail

et al. 2023

Axioms

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In recent modern power systems, the number of renewable energy systems (RESs) and nonlinear loads have become more prevalent. When these systems are connected to the electricity grid, they may face new difficulties and issues such as harmonics and non-standard voltage. The proposed study suggests the application of a whale optimization algorithm (WOA) based on a fractional-order proportional-integral controller (FOPIC) for unified power quality conditioner (UPQC) and STATCOM tools. These operate best with the help of their improved control system, to increase the system’s reliability and fast dynamic response, and to decrease the total harmonic distortion (THD) for enhancing the power quality (PQ). In this article, three different configurations are studied and assessed, namely: (C1) WOA-based FOPIC for UPQC, (C2) WOA-based FOPIC for STATCOM, and (C3) system without FACTS, i.e., base case, to mitigate the mentioned drawbacks. C3 is also considered as a base case to highlight the main benefits of C1 and C2 in improving the PQ by reducing the %THD of the voltage and current system and improving the systems’ voltage waveforms. With C2, voltage fluctuation is decreased by 98%, but it nearly disappears in C1 during normal conditions. Additionally, during the fault period, voltage distortion is reduced by 95% and 100% with C2 and C1, respectively. Furthermore, when comparing C1 to C2 and C3 under regular conditions, the percentage reduction in THD is remarkable. In addition, C1 eliminates the need for voltage sag, and harmonic and current harmonic detectors, and it helps to streamline the control approach and boost control precision. The modeling and simulation of the prepared system are performed by MATLAB/Simulink. Finally, it can be concluded that the acquired results are very interesting and helpful in the recovery to the steady state of wind systems and nonlinear loads, thereby increasing their grid connection capabilities.

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Section: B Literature Overviewmentioning

confidence: 99%

Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids

Mahmoud

Atia²,

Esmail

et al. 2023

Axioms

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“…In order to achieve effective voltage dip compensation, the parallel inverter absorbs the power required by the series inverter and UPQC losses from the system. In this regard, in the UPQC-P system, the current drawn from the network always increases in the condition of voltage dip compensation [91].…”

Section: Voltage Dip Compensation Based On Active Power Control (Upqc-p)mentioning

confidence: 99%

An Overview on Power Quality Issues and Control Strategies for Distribution Networks With the Presence of Distributed Generation Resources

Razmi

Papari

et al. 2023

IEEE Access

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Power systems based on centralized production are facing two limitations: the lack of fossil fuels and the need to reduce pollution; Therefore, the importance of distributed generation resources (DGs) has increased by connecting renewable energy systems to the network. With the increasing penetration of renewable energies in the network, power quality challenges in low voltage and medium voltage distribution systems have become one of the main fields of studies. Since most of the renewable energy systems are connected to the network with the help of electronic power converters devices and the main purpose of these converters is to connect DGs to the network in compliance with power quality standards; Therefore, if the switching frequency of inverters is not implemented properly, major power quality problems will be created. On the other hand, the reduction in power quality causes acute problems in power networks, which include lack of proper performance, reduction in useful life and efficiency of electrical and electronic devices in the network, creation of series and parallel resonance in some harmonics due to the presence of inductors and the capacitor, and as a result, more distortion in the voltage of the distribution network. This paper actually provides a road-map for researchers to investigate power quality issues. In other words, the mentioned cases show the importance of research and providing the solutions to improving power quality in distribution networks.

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“…Assuming the voltage sag fraction is denoted with 𝑓𝑓 𝑆𝑆 and 𝑓𝑓 𝑆𝑆𝑆𝑆 to be the ratio of series voltage (𝑉𝑉 𝑆𝑆𝑆𝑆 ′ ) to rated sending end voltage k, the more straight forward analysis leads to the following expressions [20]:…”

Section: Lshmentioning

confidence: 99%

“…The shunt inverter overall kVA capacity demand is found to be [20]. Since UPQC design in this work handled reactive power injection in the distribution networks, the highest value of the THD of the load current defined the rating of the shunt inverter.…”

Section: Assessment Of Va Capacity Of Vsi Connected In Seriesmentioning

confidence: 99%

“…Categorically, as presented in [14], the configuration of UPQC consists of two voltage source inverters (VSI) connected back-to-back through DC link to produce the UPQC, which are also linked in series and parallel to power network. Up till now, the largest amount of work done on UPQC has been on model development, different inverter topology designs and different control strategies [1,14,[18][19][20][21][22][23][24]. The research of [25][26][27][34][35][36] also reported the combination of the UPQC model with DG.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Improved Unified Power Quality Conditioner Allocation in Radial Distribution Network

Osaloni

Saha

2022

JERA

Self Cite

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This paper presents the investigative study on the Unified Power Quality Conditioner (UPQC) impact on Radial Distribution System (RDS). The architecture of Power Angle Controlled UPQC named Improved Unified Power Quality Conditioner (I-UPQC) was implemented in RDS. The problem of power loss, under-voltage, and reactive power burden on shunt inverters are the significant issues addressed in this study. The allocation of I-UPQC by placing it at each bus of the RDS one node at each iteration, excluding the swing bus, is studied by considering its impact on each bus of the radial network. The Power Loss Index (PLI) and Degree of Under Voltage Mitigation Node (DUVMN) values of all the buses are calculated analytically using distribution framework expressions of I-UPQC. Hence, the bus having the highest PLI value, and the minimum permissible node voltage is the most favourable. The determination of the candidate bus for I-UPQC was achieved by the load flow algorithm. The results obtained in this study on IEEE 33 and 69 bus system shows 3.9% and 4.2% power loss reduction respectively for both networks. Also, the minimum bus voltage was improved to 0.954 p.u. and 0.955 p.u. in each case for both networks, after the allocation of I-UPQC in RDS, compared to the base case. Consequently, the VA burden on shunt inverter was reduced by reactive power compensation of the series inverter. The results and simulation obtained in MATLAB / SIMULINK environment and discussion to support the concept developed are also presented. The results from the study confirmed that the concept of I-UPQC placement impacted the operation of RDS compared to the other connected UPQC model.

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Voltage Dip/Swell Mitigation and Imaginary Power Compensation in Low Voltage Distribution Utilizing Improved Unified Power Quality Conditioner (I-UPQC)

Cited by 9 publications

References 35 publications

Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids

Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids

An Overview on Power Quality Issues and Control Strategies for Distribution Networks With the Presence of Distributed Generation Resources

Impact of Improved Unified Power Quality Conditioner Allocation in Radial Distribution Network

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