scholarly journals Photovoltaic Placement for Losses Reduction and Voltage Stability Enhancement in the Port Moresby System, Papua New Guinea

2021 ◽  
Vol 56 (2) ◽  
pp. 542-551
Author(s):  
Ardiaty Arief ◽  
Muhammad Bachtiar Nappu ◽  
Ian Thomas
Keyword(s):  
Papua New Guinea ◽  
Voltage Stability ◽  
Power Grid ◽  
New Guinea ◽  
Capital City ◽  
Photovoltaic System ◽  
Voltage Profile ◽  
Power Losses ◽  
Long Distance ◽  
Port Moresby

The power grid in the capital city of Papua New Guinea, Port Moresby, still experiences problems of voltage stability and power losses due to many factors which is the common problem that most power systems continue to mitigate until today. The factors that give rise to these problems are the imbalance between generation and load and the long-distance of transmission lines. A possible solution to counteract these problems is to integrate photovoltaic systems into the power grid, especially at the load distribution network. This paper presents PV placement for Port Moresby system by using two stages, which are (1) identification of location with good irradiance then (2) determination of PV location by minimizing power losses and improving the voltage profile. This alternative approach is considered because Port Moresby city is situated in a location that is exposed to a significant amount of solar radiation of about 1976 kWh/m2 GHI annually. Therefore, this makes Port Moresby a suitable location to utilize this type of renewable energy technology. This research provides an analysis of the power flow within the Port Moresby grid through simulation using the Newton-Raphson method. The analysis and simulations are performed to identify the most sensitive buses within the system. Based on their high irradiance levels, these specific areas are identified as the best possible areas for integrating the photovoltaic system.

COMBINING ORAL TRADITIONS AND BAYESIAN CHRONOLOGICAL MODELING TO UNDERSTAND VILLAGE DEVELOPMENT IN THE GULF OF PAPUA (PAPUA NEW GUINEA)

Radiocarbon ◽  
2021 ◽  
pp. 1-21
Author(s):  
Chris Urwin ◽  
Quan Hua ◽  
Henry Arifeae
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Oral Traditions ◽  
Long Distance ◽  
Spatial History ◽  
The Past ◽  
History Of ◽  
Gulf Of Papua ◽  
The Village

ABSTRACT When European colonists arrived in the late 19th century, large villages dotted the coastline of the Gulf of Papua (southern Papua New Guinea). These central places sustained long-distance exchange and decade-spanning ceremonial cycles. Besides ethnohistoric records, little is known of the villages’ antiquity, spatiality, or development. Here we combine oral traditional and 14C chronological evidence to investigate the spatial history of two ancestral village sites in Orokolo Bay: Popo and Mirimua Mapoe. A Bayesian model composed of 35 14C assays from seven excavations, alongside the oral traditional accounts, demonstrates that people lived at Popo from 765–575 cal BP until 220–40 cal BP, at which time they moved southwards to Mirimua Mapoe. The village of Popo spanned ca. 34 ha and was composed of various estates, each occupied by a different tribe. Through time, the inhabitants of Popo transformed (e.g., expanded, contracted, and shifted) the village to manage social and ceremonial priorities, long-distance exchange opportunities and changing marine environments. Ours is a crucial case study of how oral traditional ways of understanding the past interrelate with the information generated by Bayesian 14C analyses. We conclude by reflecting on the limitations, strengths, and uncertainties inherent to these forms of chronological knowledge.

scholarly journals A new meta-heuristic pathfinder algorithm for solving optimal allocation of solar photovoltaic system in multi-lateral distribution system for improving resilience

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Varaprasad Janamala
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Voltage Stability ◽  
Optimal Allocation ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Voltage Profile ◽  
Pv System ◽  
Solar Photovoltaic System ◽  
The Impact

AbstractA new meta-heuristic Pathfinder Algorithm (PFA) is adopted in this paper for optimal allocation and simultaneous integration of a solar photovoltaic system among multi-laterals, called interline-photovoltaic (I-PV) system. At first, the performance of PFA is evaluated by solving the optimal allocation of distribution generation problem in IEEE 33- and 69-bus systems for loss minimization. The obtained results show that the performance of proposed PFA is superior to PSO, TLBO, CSA, and GOA and other approaches cited in literature. The comparison of different performance measures of 50 independent trail runs predominantly shows the effectiveness of PFA and its efficiency for global optima. Subsequently, PFA is implemented for determining the optimal I-PV configuration considering the resilience without compromising the various operational and radiality constraints. Different case studies are simulated and the impact of the I-PV system is analyzed in terms of voltage profile and voltage stability. The proposed optimal I-PV configuration resulted in loss reduction of 77.87% and 98.33% in IEEE 33- and 69-bus systems, respectively. Further, the reduced average voltage deviation index and increased voltage stability index result in an improved voltage profile and enhanced voltage stability margin in radial distribution systems and its suitability for practical applications.

Associations of Socioeconomic Status with Diet and Physical Activity in Migrant Bougainvilleans in Port Moresby, Papua New Guinea

2014 ◽  
Vol 53 (5) ◽  
pp. 471-483 ◽  
Author(s):  
Gwendalyn Vengiau ◽  
Masahiro Umezaki ◽  
Suparat Phuanukoonnon ◽  
Peter Siba ◽  
Chiho Watanabe
Keyword(s):  
Physical Activity ◽  
Socioeconomic Status ◽  
Papua New Guinea ◽  
New Guinea ◽  
Diet And Physical Activity ◽  
Port Moresby

scholarly journals Associations of Conflict-Related Trauma and Ongoing Stressors with the Mental Health and Functioning of West Papuan Refugees in Port Moresby, Papua New Guinea (PNG)

PLoS ONE ◽  
2015 ◽  
Vol 10 (4) ◽  
pp. e0125178 ◽  
Author(s):  
Alvin Kuowei Tay ◽  
Susan Rees ◽  
Jack Chen ◽  
Moses Kareth ◽  
Sylvester Lahe ◽  
...  
Keyword(s):  
Mental Health ◽  
Papua New Guinea ◽  
New Guinea ◽  
Port Moresby

Swamp and Delta Societies of the Papuan Gulf, Papua New Guinea

2021 ◽  
Author(s):  
Chris Urwin ◽  
James W. Rhoads ◽  
Joshua A. Bell
Keyword(s):  
Papua New Guinea ◽  
Late Pleistocene ◽  
New Guinea ◽  
Large River ◽  
Place Making ◽  
Long Distance ◽  
River Deltas ◽  
Coral Sea ◽  
Physical Environments ◽  
Key Sites

The Papuan Gulf’s littoral coastline has been emerging and transforming since the late Pleistocene. Large river deltas such as the Fly, Kikori, and Purari transport sediments into the Coral Sea, and these are reworked by prevailing tides and seasonal currents to form a world of sand and swamps that Papuan Gulf peoples inhabit. This article reviews the archaeology of key sites in the region and identifies themes for future explorations of the region’s rich heritage. It explores how the region’s delta-dwelling societies occupied, modified, and made sense of their relatively fluid physical environments. Two aspects are explored in detail: (1) the potential to historicize the emergence of sago cultivation and its role in sustaining local settlements and long-distance trade; and (2) the contribution of nuanced spatial histories of migration and place-making to the region’s narrative.

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