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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 10 Issue: 05 | May 2023

p-ISSN: 2395-0072

www.irjet.net

Load Flow and PV Curve Analysis of a 220kV Substation Mayur S. Sawant1, Dr. Govind R. Kunkolienker2 1P.G. Student, Department of Electrical and Electronics Engineering, Goa College of Engineering, Goa, India 2Head of the Department of Electrical and Electronics Engineering, Goa College of Engineering, Goa, India

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Abstract - Load flow analysis serves as a critical tool for

objective of this study is to foster a comprehensive understanding of load flow analysis in the context of substations and its practical applications. The findings of this research are expected to contribute towards the development of best practices in power system analysis, enhancing the knowledge and insights into this critical area of study.

analyzing and optimizing electrical power systems. In this paper, a comprehensive study on load flow analysis and voltage instability analysis is presented, focusing on a 220KV substation. The study encompasses various stages, including data collection, network model formulation, Y bus matrix development, Newton-Raphson analysis, and PV curve analysis. The primary aim of this investigation is to validate the design of new substations and upgrade existing ones, ensuring the safe and reliable operation of the electrical power system. The paper underscores the significance of load flow analysis in identifying potential issues and making informed decisions to enhance the overall performance and efficiency of the power system. This research adds to the existing knowledge in the field of electrical power systems and provides valuable insights for engineers and researchers working in this domain.

2. Theory Load flow analysis holds immense significance in maintaining the stability, reliability and efficiency of power systems within substations. As a pivotal component that bridges the transmission and distribution systems, substations play a vital role in the overall functioning of the power grid. Load flow analysis within substations facilitates the determination of crucial parameters such as voltage profiles, power flows, and loading conditions of vital components including transformers, switches and other equipment.

Key Words: Load Flow, Substation, MW, Newton Raphson, Capacitor Compensation

The PV curve serves as a valuable tool in analyzing voltage stability, as it depicts the correlation between the magnitude of the system's voltage (V) and power (P) at a specific moment in time. The PV curve delineates the loadability limits of the power system, offering valuable insights into the stability margins of the system.

1. INTRODUCTION Load flow analysis is a vital technique utilized in electrical power system studies to ascertain the magnitude and phase angle of voltage at each bus in the network, as well as the real and reactive power flowing through the branches, and the apparent power transfer between buses. This analysis provides critical insights into the operational state of the power system, including factors such as voltage stability, power transfer capacity, power losses, and identification of potential issues that may lead to power outages. Voltage stability, specifically, pertains to the ability of the power system to maintain a stable voltage level within acceptable limits despite fluctuations in load conditions or other disturbances.

Capacitor compensation is a technique used in power systems to improve voltage stability and mitigate voltage fluctuations. The effect of capacitor compensation on the PV curve is typically seen in the linear region and the knee point. When shunt capacitors are added to the system, they can shift the PV curve upwards, resulting in an increase in voltage magnitude for a given power level in the linear region. This means that the system can tolerate higher power demand levels without experiencing a significant drop in voltage, thus improving voltage stability.

Maintaining voltage stability is a crucial consideration in the operation and planning of power systems, as fluctuations in voltage levels can significantly impact the performance and reliability of electrical devices and equipment.

3. Methodology The study of load flow and PV curve analysis of a 220KV substation involves several steps, as outlined below:

This paper aims to conduct a detailed investigation into the significance of load flow analysis in substations. It encompasses a thorough examination of various aspects, including the collection of load flow data from the substation, formulation of the network model, analysis using the Newton-Raphson method utilizing MATLAB, and PV curve analysis utilizing PowerWorld simulator. The ultimate

Impact Factor value: 8.226

Data collection: The first step is to collect peak load readings and transformer ratings from the substation.

ii.

Bus network: The substation is modelled into a bus system network.

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