A study on development of ICT convergence technology for tracking-type floating photovoltaic systems

Abstract

This thesis seeks to establish the foundation for tracking-type floating PV system using ICT fusion technology through acquisition of data regarding solar power generated, amount of insolation and solar tracking sensor and real time monitoring of the system. Prior to implementation in the field, Zigbee based sensor node and coordinator of 2.45GHz bandwidth has been produced and tested by transmitting data received from sensor to coordinator and allowing monitoring not only in operation management PC, but also through mobile devices. In the process, wireless communication coordinator and middleware for information collection have been designed and tracking controller was developed. This thesis also pursues formation of low-cost, high-efficiency USN framework through analysis of signal conditions and speed of transmission.

Aquavoltaics: Synergies for dual use of water area for solar photovoltaic electricity generation and aquaculture

“…In comparing FVs against identical land based solar modules there is always an increase in power output [33] due to the reduction in the operating temperature of solar modules in either direct or indirect contact with water. Additional efforts have been made in optimizing the PCE of the modules by separating focus into four distinct system design strategies: 1) thin-film (no ridged pontoon supporting structure) [57,60], 2) submerged (pontoon/no pontoon) [56,58,59,61,62], 3) tilted arrays (pontoon) [38,[63][64][65] and 4) a new approach using micro-encapsulated phase change material (MEPCM) based pontoon modules [66][67][68]. It should be pointed out here that floatovoltaic systems also assist in land use change.…”

“…Figure 3. A representation of a floating PV pontoon with two modules at 30º tilt Two axis tracking systems track the direction and altitude of the sun in order to form a perpendicular angle with the module surface to maximize power generation [63,83,84]. When installed on land, an increase in power generation of about 41%% is seen over fixed systems at optimal tilt [83,84].…”

A Study on Development of Azimuth Angle Tracking Algorithm for Tracking-type Floating Photovoltaic System

“…On water surface, unlike on ground surface, the entire structure moves and rotates by wind or other environmental variables even if the mooring system is installed, so an error may occur to the azimuth angle [1][2][3][4][5][6][7][8][9][10].…”

“…In floating PV, the external forces including self-weight of the structure is transferred to the water through the buoyancy in the gravitational direction, so the length of the structure that can resist the gravitational direction can be designed with relatively more freedom. Also, as it floats on the water, it can rotate with a small amount of energy even if the unit rotation capacity is large (over 20kW), the structure can be made simpler than ground tracking-type if tracking-type is applied to floating PV system, thus reducing malfunction risk and increasing efficiency [1][2][3][4][5][6][7][8][9][10]. The aim of this paper is to examine types of tracking-type systems for development of a tracking algorithm for maximum power generation in floating condition and to test the developed algorithm through application in the model.…”

Structural Safety Assessment of Ocean‐Floating Photovoltaic Structure Model

“…K‐water additionally installed a 100 kW tracking type floating PV system in a nearby location in December 2013. Recently the corporation has been researching 20 kW ocean‐floating PV systems for the purpose of extending its research and business area from reservoir to sea 1–3…”