Real-time voltage control of electric spring in islanded condition

IF 1.6 Q4 ENERGY & FUELS IET Energy Systems Integration Pub Date : 2023-06-06 DOI:10.1049/esi2.12104
Deepsikha Panda, Pratim Kundu, Bharat Singh Rajpurohit
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Abstract

Islanded microgrid network is sensitive to voltage and frequency fluctuations which becomes more vulnerable in the presence of external disturbance and the intermittent nature of Renewable Energy Sources (RESs). The “Electric Spring” (ES) is one of the most effective and efficient solutions for enhancing operational flexibility and RESs integration. A Self-Excited Induction Generator (SEIG) based Micro hydro system with ES, non-critical and critical loads is considered. Both non-critical and critical loads are connected in 2:1 ratio in parallel with SEIG. The concept of voltage-sensitive and non-sensitive loads and the “power demand following the supply” idea have been incorporated for pointing up the contribution of ES. The non-critical load coupled with a three-phase inverter acts like an ES and can be operated as a Smart Load (SL). SL can compensate the voltage deviation between demand-supply side, therefore mitigating the voltage fluctuations. The effectiveness of ES in terms of voltage regulation at the point of standard coupling has been achieved which improved the overall voltage profile of the hybrid microgrid system which can be observed from various test cases. A hardware in loop microgrid experimental platform is established and its results highlight the excellent performance of the proposed method.

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孤岛状态下电弹簧的实时电压控制
孤岛微电网对电压和频率波动非常敏感,在存在外部干扰和可再生能源间歇性的情况下变得更加脆弱。“电子弹簧”(ES)是提高操作灵活性和RESs集成的最有效和高效的解决方案之一。研究了一种具有ES、非临界负荷和临界负荷的基于自激感应发电机(SEIG)的微水电系统。非关键和关键负载都以2:1的比例与SEIG并联。电压敏感和非敏感负载的概念以及“电力需求随供应”的思想被纳入,以指出ES的贡献。与三相逆变器耦合的非关键负载类似于ES,可以作为智能负载(SL)运行。SL可以补偿供需侧的电压偏差,从而缓解电压波动。ES在标准耦合点电压调节方面的有效性得到了实现,从而改善了混合微电网系统的整体电压分布,这可以从各种测试案例中观察到。建立了硬件环内微电网实验平台,实验结果表明了该方法的优良性能。
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来源期刊
IET Energy Systems Integration
IET Energy Systems Integration Engineering-Engineering (miscellaneous)
CiteScore
5.90
自引率
8.30%
发文量
29
审稿时长
11 weeks
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