Assessment of Malaysia's Large‐Scale Solar Projects: Power System Analysis for Solar PV Grid Integration

Abstract

carried out via stand-alone system or grid connected via large-scale solar (LSS) PV. LSS PV is a centralized system consisting of PV arrays with a power system network packed with various types of electronic equipment for grid integration. This study focuses on several design parameters that are expected to exhibit significant effect to the performance parameters of the power grid in large-scale centralized grid-connected PV system. [3] Solar photovoltaic energy harvesting is dependent on the photovoltaic effect and physical phenomenon. During daytime, this clean energy is largely available with varying peak sun hour depending on its geographical locations. Studies on the generations profile and its load profiles can greatly reduce the dependence of conventional energy sources in the energy mix. [4] The intermittency, generation-load profiles, and stability issues presented a new challenge in large-scale solar PV integration with the power grid system. This paper will discuss the relevant technical concerns and impact of large-scale PV systems integration on power grid system in the literature review and propose a solution in the research methodology section. Novelty of the WorkThis paper carried out a pilot study on LSS to power integration using real LSS data in Malaysia and taking industry grade solar PV with local contextualization, national grid code in sizing, and design considerations. This paper investigated the current transmission network overloading issue due to the LSS PV penetration into the existing national power grid in Malaysia. The challenge involves the selection of appropriate bus system for analysis and its impact to potential difference variation at each bus. In order to achieve stability in the power system network, this paper also looks into the most significant parameters that greatly affect the potential difference stability and hence proposed a feasible mitigating solution. Thus, an optimized configuration for the integration of LSS PV to the bus of the transmission network for the Malaysia context will form the novelty of this paper.Malaysia targets to become the second-largest producer of solar photovoltaic (PV) in the world by increasing the current output from 12% to 20% in 2020. The government also expects to achieve 45% reduction of greenhouse gas emission by 2030 through renewable energy mainly by solar PV. Large-scale solar (LSS) aims to produce 2.5 GW, which contributes to 10% of the nation's electricity demands. The LSS system is held back by the grid-scale integration, transmission, and distribution infrastructure. Thus, power system analysis is crucial to achieve optimization in LSS to power grid integration. This paper investigates various power system analysis models and recommends an optimized configuration based on Malaysia's LSS scenario. In stage 1, an optimal PV sizing is carried out based on real data of LSS installation in different locations. In stage 2, power analysis is carried out using to analyze the potential difference variation when connected to a nine-bus p...

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