An Economic Analysis of the Shading Effects of Transmission Lines on Photovoltaic Power Plant Investment Decisions: A Case Study

In today’s photovoltaic (PV) power plants, traditional crystalline PV modules are the prevalent technology, which is highly susceptible to partial shading due to the risk of irreversible damage. Therefore, it is advisable to explore potential construction sites for objects that might cause shading, including high-voltage transmission towers, whose shading effects can be significant due to their height. By means of innovative simulation, using a model, validated with actual data, this study endeavored to deliver novel information related to the problems of shading by high-voltage transmission lines. In the context of Hungary, it examined the risk factors, technical and economic aspects, and possible solutions important for PV projects. It provides new insight, much needed also at the international level, considering the fact that the extent of the shadows cast by conductors on the surface at low Sun elevations is not known at present and neither are the shading characteristics of conductors between two transmission towers, depending on their height, in winter, when the Sun is low. An added practical benefit of the study is that its technical and economic approaches and the software solutions are all based on the practice of PV system design and construction. Related to the investigated issues, this can facilitate the formulation of the technical and economic aspects of suitable PV power plant building strategies in Hungary.

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Development of C.B.T Hot End Yoke Device for Hot Line Insulator Replacement of 230-kV Double Suspension String for Two Bundles with Arcing Horn

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.931-932.862 ◽

2014 ◽

Vol 931-932 ◽

pp. 862-866

Author(s):

Charoenchai Kajonwattanakul ◽

Wanwisa Skolpap

Keyword(s):

Power Plant ◽

Transmission Line ◽

High Voltage ◽

Transmission Lines ◽

Electrical Energy ◽

Initial Letter ◽

Corrective Maintenance ◽

Maintenance Time ◽

Central Regions ◽

High Voltage Transmission

Electrical energy generating from power plant is transmitted to electrical substations via high-voltage transmission lines. After a certain period time of use, the transmission line is required for maintenance such as insulator replacement. To avoid power interruption during insulator replacement, a corrective maintenance, hot line maintenance, is performed. This research focused on the hot line insulator replacement of 230 kV Bangsapan-Chumporn and 230 kV Chumporn-Suratthani transmission lines transferring power between southern and central regions of Thailand. The maintenance of 230 kV double suspension string for two bundles with arcing horn required developed C.B.T. hot end yoke tool to enhance stability and availability of electrical energy during hot line insulator replacement. C.B.T was named by the initial letter of the name of Chumporn Bandon and Takuapa transmission lines under authorization of the maintenance section in responsible maintaining service of transmission lines in upper southern provinces. The developed C.B.T hot end yoke device for hot line insulator replacement could save about 2.67 million bahts during 7-hour of maintenance time of EGAT payment.

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Challenges, trade-offs, and opportunities in the design of power transmission lines: a water-energy perspective

10.5194/egusphere-egu2020-12347 ◽

2020 ◽

Author(s):

Stefano Galelli ◽

AFM Kamal Chowdhury ◽

Thanh Duc Dang

Keyword(s):

High Voltage ◽

Transmission Lines ◽

Power Plants ◽

Fossil Fuels ◽

Power Transmission ◽

Climatic Variability ◽

Climatic Conditions ◽

Management Interventions ◽

Trade Offs ◽

High Voltage Transmission

<p>High-voltage transmission lines provide the fundamental service of delivering electricity over long distances, connecting power plants to demand centers. Their role is particularly critical in energy systems characterized by the presence of hydropower, and other renewable resources, whose output exhibits trends and shifts in response to hydro-climatic variability. Yet, the design and operation of transmission networks is rarely placed within a broad water-energy context, often resulting in infrastructures unable to dispatch the available power during peak-production periods. The case in point is Laos: the country has attracted large investments in the hydropower sector, but their effectiveness is severely limited by the capacity of the high-voltage transmission facilities. Here, we show how such challenge could be tackled through the use of process-based models describing the interconnections between water, energy, and power transmission components. Specifically, we run our modelling framework over a broad range of hydro-climatic conditions, so as to identify the transmission lines severely limited by their capacity. With this information at hand, we then explore the potential of both design and management interventions. Potential solutions include the capacity expansion of a few transmission lines and the adoption of a wide area synchronous grid, which facilitates electricity exchange across Laos and Thailand. Results show that both solutions are cost-effective: they require limited investment costs and reduce reliance on fossil fuels, resulting in a significant abatement of CO<sub>2&#160;</sub>emissions.</p>

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