Power quality investigation of a grid tied hybrid energy system using a D-STATCOM control and grasshopper optimization technique

A photovoltaic micro grid linked to a utility grid requires active and reactive power control. Active power balances generation and load demand, preventing oversupply or overloading. The Static Synchronous Compensator (STATCOM) based on a Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) is used to control these power flows, enhancing grid stability, power quality, and energy efficiency. Reactive power is crucial for maintaining voltage levels within the grid, especially in distribution networks with high PV penetration. STATCOM, a PWM-VSI-based system, manages reactive power flow by dynamically adjusting the inverter's output voltage to compensate for voltage fluctuations and maintain a stable voltage profile. Reactive power management enhances reliability and quality in micro grid connected utility grid by minimizing issues like voltage sags, flickers, and power losses. In this proposed system, the modified PWM-VSI STATCOM regulates PV system voltage and current waveforms using P&O MPPT controller and SAR MPPT controller, ensuring grid stability during variable solar generation. Active power and reactive power controlling by implementing SAR MPPT connected SPV system tied 400 V,50 Hz utility grid integrated modified PWM-VSI STATCOM controller is superior as compared to the P&O MPPT connected SPV system tied 400 V, 50 Hz utility grid integrated modified PWM-VSI STATCOM controller in terms of active power management and reactive power control. In this proposed system, it has been observed that the SAR MPPT control based SPV plant is capable to extract 13.56 KW power & 883.9 V whereas P&O control based SPV plant is capable to extract 13.47 KW power, 882.7 V.

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A Review on the Impact of Transmission Line Compensation and RES Integration on Protection Schemes

Mazibuko,

Akindeji,

Moloi

2024

Energies

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South Africa is currently experiencing an energy crisis because of a mismatch between energy supply and demand. Increasing energy demand necessitates the adequate operation of generation and transmission facilities to maintain the reliability of the power system. Transmission line compensation is used to increase the ability to transfer power, thereby enhancing system stability, voltage regulation, and reactive power balance. Also, in recent years, the introduction of renewable energy sources (RES) has proven to be effective in supporting the grid by providing additional energy. As a result, the dynamics of power systems have changed, and many developing nations are adopting the integration of renewable energy into the grid to increase the aspect ratio of the energy availability factor. While both techniques contribute to the grid’s ability to meet energy demand, they frequently introduce technical challenges that affect the stability and protection of the systems. This paper provides a comprehensive review of the challenges introduced by transmission line compensation and the integration of renewable energy, as well as the various techniques proposed in the literature to address these issues. Different compensation techniques, including fault detection, classification, and location, for compensated and uncompensated transmission lines, including those connected to renewable energy sources, are reviewed. This paper then analyzes the adaptive distance protection schemes available in the literature to mitigate the impact of compensation/integration of RES into the grid. Based on the literature reviewed, it is essential for protection engineers to understand the dynamics introduced by network topology incorporating a combination of RES and heavily compensated transmission lines.

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Power quality investigation of a grid tied hybrid energy system using a D-STATCOM control and grasshopper optimization technique

Cited by 4 publications

References 26 publications

A heuristic approach for insertion of multiple-complex coefficient-filter based DSTATCOM to enhancement of power quality in distribution system

A heuristic approach for insertion of multiple-complex coefficient-filter based DSTATCOM to enhancement of power quality in distribution system

Successive Approximation Register Maximum Power Point Tracking Control with modified PWM-VSI STATCOM for active and reactive power management in a utility grid tied solar photovoltaic system

A Review on the Impact of Transmission Line Compensation and RES Integration on Protection Schemes

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