Grid Voltage Regulation Essay

3673 WordsDec 16, 201215 Pages
Grid Voltage Regulation Utilizing Storage Batteries in PV Solar – Wind Plant based Distributed Generation System V. Khadkikar, Member, IEEE, Rajiv K. Varma, Member, IEEE and Ravi Seethapathy, Senior Member, IEEE daylight hours are less. On the other hand, the power generation from wind plants is generally more during nighttimes due to higher wind speeds. In recent years, as the sizes of wind and solar plants are increasing in distribution systems, efforts are being made to improve the reliability of these systems. One of the attractive solutions is to incorporate storage batteries with these DG systems such that when excess power is produced, it can be stored and delivered during peak hours when required [1-2]. Fig. 1 (a) shows a system configuration for a directly coupled wind turbine system with battery storage facility [3-4]. The directly coupled wind turbine system however requires an additional bidirectional converter to charge/discharge the batteries. Fig. 1(b) shows the system configuration of a converter – inverter based wind energy system with storage battery directly integrated on DC side of the converter [3], [5]. This topology has advantage as the additional generated power can be directly stored and delivered whenever required by utilizing the grid side inverter. Abstract—In this paper, a novel night-time application of a photovoltaic (PV) solar power farm bidirectional inverter as a battery charger, is presented. It is shown that a combination of PV solar farm and storage batteries can be advantageous in a distribution system having wind farm in close vicinity to the solar farm. Under such a condition, the PV solar farm inverter can regulate the grid voltage (if allowed by the code) by charging/ discharging the batteries as well as provide better asset utilization and return on investments. The PV solar farm inverter is operated as a three-phase

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