Angular symmetrical components-based anti-islanding method for solar photovoltaic-integrated microgrid by Dr.V.Arivumani

This article examines how an innovative Angular Symmetrical Components of Voltages be applied to islanding detection and voltage unbalance factor estimation at a photovoltaic inverter-based distribution unit. Positive and Negative Sequence Components are converted into a polar form such as Line Aggregate RMS (LARMS) Voltage and Tangent Angle of Unbalance (TAU) which are determined from two line voltage signals. Three voltage relays are replaced with a single relay which compares the LARMS voltage and TAU with threshold limits to identify the condition of balance. ASCOV relay does not generate the trip signal in a non-islanding situation such as linear load switching and nonlinear load switching. The Non-Detection Zone (NDZ) of this ASCOV relay is very low compared to other relays. The proposed anti-islanding method is tested in a SPV powered microgrid using MATLAB/SIMULINK and the performance was studied under islanding and non-islanding events. Consequently, the simulation outcome indicates that the proposed technique effectively identifies the islanding condition with less computation time as 1 s and the performance of the proposed relay is compared with existing relays. The voltage unbalance factor determined by the proposed method is very close to the actual value in all types of unbalance conditions.

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𝐏𝐫𝐞-𝐃𝐨𝐜𝐭𝐨𝐫𝐚𝐥 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠 𝐏𝐫𝐨𝐠𝐫𝐚𝐦 | 𝐅𝐢𝐧𝐚𝐥 𝐒𝐞𝐦𝐞𝐬𝐭𝐞𝐫 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐈𝐧𝐭𝐞𝐫𝐧𝐬𝐡𝐢𝐩 @ 𝐈𝐈𝐒𝐜 (𝐄𝐒𝐄) | 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡 𝐄𝐱𝐩𝐨𝐬𝐮𝐫𝐞 𝐟𝐨𝐫 𝐁.𝐓𝐞𝐜𝐡 & 𝐌.𝐓𝐞𝐜𝐡 𝐒𝐭𝐮𝐝𝐞𝐧𝐭𝐬

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