Use of solar PV inverters during night-time for voltage regulation and stability of the utility grid

Author:

Tharuka Lulbadda Kushan1ORCID,Hemapala Udayanga1

Affiliation:

1. Department of Electrical Engineering, University of Moratuwa , Moratuwa , Sri Lanka

Abstract

Abstract Photovoltaic (PV) inverters are vital components for future smart grids. Although the popularity of PV-generator installations is high, their effective performance remains low. Certain inverters are designed to operate in volt-ampere reactive (VAR) mode during the night. Yet, this approach is ineffective due to the consumption of active power from the grid (as internal losses) and the regulation necessity of the direct-current (DC) bus. This paper will demonstrate the operation of a PV inverter in reactive power-injection mode when solar energy is unavailable. The primary focus is on the design of the inverter controller with respect to the synchronous rotating frame control method. The proposed novel method enables an inverter to inject the required level of reactive power to regulate the voltage levels of the utility grid within specified limits. In the process, the inverter does not absorb active power from the grid for its internal operation. The presented model has the ability to inject ≤2 kVAR of reactive power at zero power factor without absorbing active power from the grid. Simulation and hardware models of the inverter were developed and tested for different reactive loads in which the hardware model represented the real-world application. The reactive power injection of the two models ran at zero power factor and produced the expected outcomes for their corresponding independent reactive loads. Henceforth, it was evident that the proposed method can enhance the efficiency of an inverter and ensure the stability of the utility grid to which it is connected.

Publisher

Oxford University Press (OUP)

Subject

Management, Monitoring, Policy and Law,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Environmental Engineering

Reference23 articles.

1. Comprehensive reactive power support of DFIG adapted to different depth of voltage sags;Shen;Energies,2017

2. Delta-connected static var compensator (SVC) based hybrid active power filter (SVC-HAPF) and its control method;Wang,29 2017–1 2017

3. Competitiveness of PV inverter as a reactive power compensator considering inverter lifetime reduction.;Gandhi,2018

4. Distributed voltage regulation using Volt-VAR controls of a smart PV inverter in a smart grid: an experimental study;Howlader;Journal of Renewable Energy,2018

5. Distribution network voltage control by active power/reactive power injection from PV inverters;Liu,2018

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3