A lot of research has happened in Electrical Engineering in the field of Power Engineering with regards to Power System Stability and related issues. The research work presented as part of this book only adds to this multitude of findings in the area of Load Modelling which plays an important role in Voltage Stability Analysis. We addressed the Voltage Instability issues arising in the presence of Polynomial Loads with Computational Intelligence as a tool to solve this issue.
Table of Contents
CHAPTER 1
INTRODUCTION
1.1 Background of work proposed
1.2 Definitions of Voltage Stability
1.2.1 Definitions according to CIGRE
1.2.2 Definitions according to Hill and Hiskens
1.2.3 Definitions according to IEEE
1.3 Literature Survey
1.4 Overview of work presented in the book
CHAPTER 2
PROBLEM DEFINITION
2.1 Problem formulation and Approach
2.2 What is Voltage Instability Problem
2.3 Causes of Voltage Instability
2.4 Workflow
CHAPTER 3
MODEL AND COMPONENT DESCRIPTION
3.1 IEEE 14 Bus Power System Network
3.2 Polynomial Loads
3.3 Static Var Compensator
3.4 Static Synchronous Compensator
CHAPTER 4
SOFTWARE FLOW ROUTINE
4.1 Binary Search Algorithm
4.2 Fast Decoupled Load Flow Approach
4.3 Power System Analysis Toolbox
CHAPTER 5
RESULTS AND ANALYSIS
5.1 Analysing the load models
CHAPTER 6
CONCLUSION AND FUTURE PROSPECTS
6.1 Conclusion
6.2 Future Prospects
Objectives and Research Themes
This work aims to address voltage instability issues in modern power systems by evaluating the performance of flexible AC transmission system (FACTS) devices, specifically the Static Var Compensator (SVC) and Static Synchronous Compensator (STATCOM). The research investigates how these devices can mitigate instability caused by polynomial (ZIP) load models, employing a binary search procedure to optimize their location and sizing within an IEEE 14 bus network.
- Analysis of power system voltage stability and related load modelling challenges.
- Comparative study of SVC and STATCOM performance in mitigating voltage instability.
- Application of binary search algorithms to optimize FACTS device placement and sizing.
- Simulation-based validation using the IEEE 14 bus power system network.
- Evaluation of voltage magnitude profiles and maximum loadability limits under stressed conditions.
Excerpt from the Book
3.3 Static Var Compensator
A Static VAR Compensator [4] is a set of electrical device for providing fast-acting reactive power on high-voltage electricity transmission networks. Static VAR compensator in short SVC is part of the flexible AC transmission system device family, regulating voltage, power factor, harmonics and stabilizing the system. Unlike a synchronous condenser which is a rotating electrical machine, a static VAR compensator has no significant moving parts (other than internal switchgear). Prior to the invention of the SVC, power factor compensation was the preserve of large rotating machines such as synchronous condensers or switched capacitor banks.
The SVC is an automated impedance matching device, designed to bring the system closer to unity power factor. SVCs are used in two main situations:
1. Connected to the power system, to regulate the transmission voltage known as Transmission SVC.
2. Connected near large industrial loads, to improve power quality also known as Industrial SVC.
In transmission applications, the SVC is used to regulate the grid voltage. If the power system's reactive load is capacitive (leading), the SVC will use thyristor controlled reactors to consume VARs from the system, lowering the system voltage. Under inductive (lagging) conditions, the capacitor banks are automatically switched in, thus providing a higher system voltage.
Summary of Chapters
CHAPTER 1: Provides an introduction to voltage stability problems and a comprehensive literature review of existing definitions and stability research.
CHAPTER 2: Outlines the problem formulation, explaining the significance of voltage instability and the factors contributing to it, along with the proposed workflow.
CHAPTER 3: Describes the components used in the research, including the IEEE 14 bus network, polynomial load models, SVC, and STATCOM.
CHAPTER 4: Details the algorithmic approach used, specifically the binary search procedure and the fast-decoupled load flow method implemented in the PSAT environment.
CHAPTER 5: Presents the simulation results and analysis, comparing voltage magnitude profiles and maximum loadability limits before and after installing FACTS devices.
CHAPTER 6: Concludes the research by summarizing the effectiveness of SVC and STATCOM and suggests areas for future research involving different load models.
Keywords
Voltage Stability, Power System, Polynomial Loads, ZIP Model, SVC, STATCOM, Binary Search, Load Modelling, IEEE 14 Bus, FACTS, Reactive Power, Voltage Collapse, Power Flow, Simulation, PSAT
Frequently Asked Questions
What is the primary focus of this research?
The research focuses on analyzing and mitigating voltage instability in electrical power systems by using flexible AC transmission system (FACTS) devices to compensate for the effects of polynomial load models.
What are the central themes of the study?
The central themes include power system stability, load modelling, the performance of shunt FACTS controllers, and the use of binary search for device optimization.
What is the main research objective?
The objective is to demonstrate that SVC and STATCOM devices can effectively improve voltage stability and loadability limits when installed at optimal locations determined by a binary search approach.
Which scientific methods are utilized?
The study utilizes continuation power flow analysis, fast-decoupled load flow routines, and a binary search algorithm for optimization, all performed within the Power System Analysis Toolbox (PSAT).
What does the main body of the work cover?
The main body covers problem definitions, descriptions of the IEEE 14 bus test model, detailed modeling of SVC and STATCOM devices, the software routines adopted, and the final results of the simulations.
Which keywords characterize this study?
Key terms include Voltage Stability, ZIP load models, FACTS, SVC, STATCOM, Binary Search, and IEEE 14 bus system.
Why are polynomial load models significant in this study?
Polynomial or ZIP loads are commonly found in industrial and residential utilities and have a critical impact on voltage stability, necessitating accurate modeling to maintain system security.
How does the binary search algorithm assist in this research?
The binary search algorithm is used as an efficient computational tool to find the optimal size and location for the FACTS devices to maximize system stability.
What is the conclusion regarding SVC and STATCOM performance?
The study observes that both devices significantly improve voltage stability, with SVC being noted as more cost-effective while STATCOM offers technical advantages through advanced semiconductor technology.
- Arbeit zitieren
- Gutha Naveen Kumar (Autor:in), 2019, Power Transmission Network Security under Loaded Conditions, München, GRIN Verlag, https://www.grin.com/document/498580
