In this paper, voltage stability index and the theories on voltage stability as well as WAMS` functions are proposed. The use of WAMS can help system to make quick measures to keep the voltage stability.
Wide-area measurement systems (WAMS) is a system to measure the parameters of the power system and deal with abnormal cases. Transient voltage stability is the ability that the system keeps the voltage normal after fault, which is very important to the power system.
Table of Contents
1 Introduction
2 Structure, Principle & basic goals of WAMS
2.1 Structure
2.2 Principle
2.3 Basic functions
3 Voltage Stability
4 WAMS to transient voltage stability
5 Voltage stability index
5.1 Simple index
5.2 Stability Area
5.3 Dynamic safety area
5.4 Research on voltage stability region
5.5 Voltage stability margin
6 Transient detection with WAMS
7 Summary
Research Objectives and Topics
The paper explores the application of Wide-Area Measurement Systems (WAMS) to enhance the monitoring and analysis of power system stability. It investigates voltage stability indices and theoretical frameworks to enable real-time detection of transient instability, ultimately aiming to prevent grid collapses and improve power system resilience.
- Architectural design and operational principles of WAMS.
- Theoretical analysis of transient voltage stability in power networks.
- Development of quantitative indices for assessing voltage stability margins.
- Identification of stability areas and dynamic safety boundaries.
- Implementation of real-time detection schemes for transient disturbances.
Excerpt from the Book
2.2 Principle
PMU sub stations installed in power plants and substations will be packaged with GPS time scale data and transmits to the data center via a high speed communication network. Data center synchronously processes and store the phase of each sub station, then calculates and gets the unit and the bus` voltage, phase angle, relative units and line power etc. , realizes collection and monitoring of dynamic data of power network, and offers important data sources for monitoring, fault analyzing and controlling the power system. Nowadays, WAMS` functions are turning from only monitoring to online dynamic security assessment, auxiliary pre decision control, emergency control etc.
Summary of Chapters
1 Introduction: Provides an overview of the growing importance of WAMS in addressing real-time synchronism and spatial monitoring needs in modern power systems.
2 Structure, Principle & basic goals of WAMS: Details the hardware composition, communication principles, and functional objectives of wide-area measurement systems.
3 Voltage Stability: Defines voltage dips and discusses their primary causes, such as short circuits, and the impact of these events on system integrity.
4 WAMS to transient voltage stability: Explains how WAMS utilizes transient data and synchrophasor technology to monitor and predict potential voltage collapse.
5 Voltage stability index: Derives mathematical criteria and indices—including simple indices, stability areas, and margins—to quantify the stability state of the power system.
6 Transient detection with WAMS: Describes a real-time detection scheme that uses WAMS data to identify and respond to transient instabilities.
7 Summary: Concludes by emphasizing the effectiveness of WAMS in measuring system parameters and forecasting stability issues.
Keywords
Wide-Area Measurement Systems, WAMS, Power System Stability, Transient Voltage Stability, Phase Measurement Unit, PMU, Voltage Stability Index, Real-time Monitoring, Dynamic Security Assessment, Synchrophasor Technology, Grid Stability, Power System Protection
Frequently Asked Questions
What is the core focus of this publication?
The paper focuses on leveraging Wide-Area Measurement Systems (WAMS) to improve the reliability and stability of electrical power systems through real-time data collection and analysis.
Which key areas are covered in this study?
The study covers the architecture of WAMS, the theoretical definitions of voltage stability, the development of mathematical stability indices, and methods for detecting transient grid disturbances.
What is the primary objective of the research?
The primary goal is to establish a framework for real-time voltage stability monitoring that allows operators to detect transient faults and prevent cascading grid failures.
Which methodologies are employed to analyze stability?
The paper utilizes mathematical stability indices, Jacobian matrix analysis, and energy function methods to determine the stability status of power systems under disturbance conditions.
What topics are discussed in the main body of the paper?
The main body examines system structure, the definition of voltage dips, specific stability indices like dynamic safety areas, and a concrete scheme for transient detection using WAMS.
Which keywords best characterize this work?
Key terms include WAMS, Transient Voltage Stability, Synchrophasor technology, PMU, Voltage Stability Index, and Online Dynamic Security Assessment.
How do PMUs contribute to the overall WAMS function?
PMUs (Phasor Measurement Units) are installed at substations to provide synchronized, high-speed data regarding phase angles and voltages, which are essential for central control and fault analysis.
What is the significance of the "dynamic safety area" defined in the paper?
The dynamic safety area provides a theoretical boundary for power injection that ensures the system remains transiently stable, serving as a critical metric for operational security.
How does the transient detection scheme function in practice?
The scheme inputs real-time data from WAMS, performs a system equivalence process, calculates stability indices, and checks them against specific criteria to determine if the system is unstable.
- Citar trabajo
- Bachen Wang (Autor), 2016, Wide-area measurement systems applied to voltage stability, Múnich, GRIN Verlag, https://www.grin.com/document/318654
