RELIABILITY ANALYSIS OF PV NANOGRID USING STATE SPACE

• Main Author: Ryandi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63686
• Institution: Institut Teknologi Bandung

ABSTRACT RELIABILITY ANALYSIS OF PV NANOGRID USING STATE SPACE By Ryandi NIM: 23220082 (Master’s Program in Electrical Engineering) The solar PV system benefits electrified islands in Indonesia, with many islands located in frontier, remote, and disadvantaged areas. PV nanogrid can serve a single building up to 5 kW based on a solar PV system. This study describes the modelling reliability of a PV nanogrid using state-space analysis with the Markov process. It simulates three scenarios, where the basic scenario is PV nanogrid consist of PV array and inverter, the Scenario 1 is a PV nanogrid with battery system without maintenance, Scenario 2 is extension Scenario 1 with the maintenance of the battery system, and Scenario 3 is a PV nanogrid connected to the grid. The simulation uses MATLAB/ Simulink software to provide the reliability and expected lifetime of the system. In this study, parameters and reliability data use existing literature and standard. The sensitivity analysis shows the variation of failure rates and repair rates and their effect. The results show that the additional battery system increases the reliability and expected lifetime of the system, and the battery system’s maintenance makes it higher. PV nanogrid connected to a grid provides high reliability and a long expected lifetime. PV nanogrid is also evaluated based on risk with a quantitative approach. The novelty of this research fills the gap in the determination of maintenance to support the operation and maintenance business model where maturity is still low. Keywords: expected lifetime, Markov process, nanogrid, reliability, state space