Performance of Electric Spring Under Varying Non-Critical Load Power Factor in Isolated Microgrid

Mohanty, Soumya; Pati, Swagat; Kar, Sanjeeb Kumar; Lenka, Lohit Ranjan

doi:10.1109/isssc56467.2022.10051535

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…In [40], a strategy to improve the power factor at the point of common coupling (PCC) for MG applications was presented, and the proposed compensation scheme for power factor improvement can be used dynamically for linear and nonlinear loads. The performance of the smart load at different power factors was also evaluated in [41].…”

Section: Problem Formulationmentioning

confidence: 99%

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

et al. 2023

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The issue of low-power factor operation microgrids was reported for several layouts. Although numerous power factor improvement strategies have been applied and tested, various concerns remain to be addressed such as transient performance, simplicity of implementation, and satisfying the power-quality standards. The presented research aimed to design and implement controllers that can improve the transient response of microgrids due to changes in the load demand and achieve a near-unity power factor at the AC grid side, to which the DC microgrid is connected. Due to the nonlinear nature of microgrids, as they rely on power electronics converters, a Fuzzy type 2 controller was designed, implemented, and tested. The focus was given to improving the power factor of the DC microgrids. The validation of the proposed technique was verified by comparing its performance with Fuzzy type 1 and autotuned conventional PI controllers. To achieve the set aims, two nested control loops were designed with an inner current loop and an outer voltage loop. Besides MATLAB/Simulink simulations, a 10 kHz-sampling dSPACE platform was used to implement the suggested system. Two operational scenarios were tested: (1) a step change in the DC link voltage and (2) a change in the AC load (increase and decrease) at the output of the power inverter, connected to the DC grid. The simulation and experimental results confirmed that the proposed Fuzzy type 2 controller performed better than the other two techniques regarding the dynamic response, steady-state error, and compliance with power quality standards. Conventional approaches develop controllers using a linearized model, which limits the model accuracy and ignores higher-order variability. The method employs the nonlinear model. Fuzzy type 2 can better approximate high-precision problems than Fuzzy type 1.

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Section: Problem Formulationmentioning

confidence: 99%

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

et al. 2023

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“…The basic structure of the ES is of three-phase ES-1 type. However, to accommodate renewable integration and active power transfer, a battery bank is included in the DC side of the inverter [21], resulting in a hybrid topology-based ES that combines both ES-1 and ES-2 topologies.…”

Section: Basic Operation Of Electric Springmentioning

confidence: 99%

Real‐time voltage control of electric spring in islanded condition

Panda

Kundu

Rajpurohit

2023

IET Energy Syst Integration

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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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Minimum Voltage Injection Based Electric Spring for Isolated Microgrid Operation

Mohanty,

Pati,

Kar

2023

2023 IEEE 3rd International Conference on Sustainable Energy and Future Electric Transportation (SEFET)

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Performance of Electric Spring Under Varying Non-Critical Load Power Factor in Isolated Microgrid

Cited by 3 publications

References 7 publications

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

Unity Power Factor Operation in Microgrid Applications Using Fuzzy Type 2 Nested Controllers

Real‐time voltage control of electric spring in islanded condition

Minimum Voltage Injection Based Electric Spring for Isolated Microgrid Operation

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