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http://dx.doi.org/10.17661/jkiiect.2021.14.1.56

The bidirectional DC module type PCS design for the System Inter Connection PV-ESS of Secure to Expandability  

Hwang, Lark-Hoon (Department of Electrical Engineering,Semyung University)
Na, Seung-Kwon (Department of Electrical Engineering,Semyung University)
Choi, Byung-Sang (Department of Electrical Engineering,Semyung University)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.14, no.1, 2021 , pp. 56-69 More about this Journal
Abstract
In this paper, the PV system with a link to the commercial system needs some advantages like small capacity, high power factor, high reliability, low harmonic output, maximum power operation of solar cell, and low cost, etc. as well as the properties of inverter. To transfer the PV energy of photovoltaic power generation system to the system and load, it requires PCS in both directions. The purpose of this paper is to confirm the stable power supply through the load leveling by presenting the PCS considering ESS of photovoltaic power generation. In order to achieve these purpose, 5 step process of operation mode algorithm were used according to the solar insolation amount and load capacity and the controller for charging/ discharging control was designed. For bidirectional and effective energy transfer, the bidirectional converter and battery at DC-link stage were connected and the DC-link voltage and inverter output voltage through the interactive inverter were controlled. In order to prove the validity of the suggested system, the simulation using PSIM was performed and were reviewed for its validity and stability. The 3[kW] PCS was manufactured and its test was conducted in order to check this situation. In addition, the system characteristics suggested through the test results was verified and the PCS system presented in this study was excellent and stronger than that of before system.
Keywords
charging/ discharging control; ESS; PCS; photovoltaic power; PSIM; PV system;
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