Book contents
- Frontmatter
- Contents
- Preface
- List of Symbols, Acronyms and Abbreviations
- 1 Introduction
- 2 Control systems techniques for small-signal dynamic performance analysis
- 3 State equations, eigen-analysis and applications
- 4 Small-signal models of synchronous generators, FACTS devices and the power system
- 5 Concepts in the tuning of power system stabilizers for a single machine system
- 6 Tuning of PSSs using methods based on Residues and the GEP transfer function
- 7 Introduction to the Tuning of Automatic Voltage Regulators
- 8 Types of Power System Stabilizers
- 9 Basic Concepts in the Tuning of PSSs in Multi-Machine Applications
- 10 Application of the PSS Tuning Concepts to a Multi-Machine Power System
- 11 Tuning of FACTS Device Stabilizers
- 12 The Concept, Theory, and Calculation of Modal Induced Torque Coefficients
- 13 Interactions between, and effectiveness of, PSSs and FDSs in a multi-machine power system
- 14 Coordination of PSSs and FDSs using Heuristic and Linear Programming Approaches
- Index
8 - Types of Power System Stabilizers
Published online by Cambridge University Press: 05 February 2016
- Frontmatter
- Contents
- Preface
- List of Symbols, Acronyms and Abbreviations
- 1 Introduction
- 2 Control systems techniques for small-signal dynamic performance analysis
- 3 State equations, eigen-analysis and applications
- 4 Small-signal models of synchronous generators, FACTS devices and the power system
- 5 Concepts in the tuning of power system stabilizers for a single machine system
- 6 Tuning of PSSs using methods based on Residues and the GEP transfer function
- 7 Introduction to the Tuning of Automatic Voltage Regulators
- 8 Types of Power System Stabilizers
- 9 Basic Concepts in the Tuning of PSSs in Multi-Machine Applications
- 10 Application of the PSS Tuning Concepts to a Multi-Machine Power System
- 11 Tuning of FACTS Device Stabilizers
- 12 The Concept, Theory, and Calculation of Modal Induced Torque Coefficients
- 13 Interactions between, and effectiveness of, PSSs and FDSs in a multi-machine power system
- 14 Coordination of PSSs and FDSs using Heuristic and Linear Programming Approaches
- Index
Summary
Introduction
In Chapter 5 a speed-PSS based on the P-Vr design approach is described. The purpose of this chapter is to describe in detail the theoretical basis for some of the widely deployed types of PSSs and the associated practical implications. For some other types of PSSs, including the multi-path, multi-band PSS developed by Hydro-Québec, only a brief overview is provided. Furthermore, the details of a number of other types of PSSs and their development are omitted from this book, for example: delta-omega stabilizers (without and with torsional filters) [1]; the use of notch filters to attenuate the first torsional mode [2]; the application of the coordinated AVR/PSS, called the “Desensitized Four Loops Regulator” [3].
The input to the PSS in Chapter 5 is assumed to be the ‘true’ rotor speed as measured directly by a high-fidelity tacho-generator, a toothed wheel, or some other device mounted on the shaft of the turbine-generator unit. In practice there may be physical difficulties in positioning any such device on the shaft as well as locating it to minimize the introduction of the torsional modes of the shaft into the speed signal. Moreover, other difficulties such as noise, lateral shaft movement (runout or ‘wobble’ [4]) in vertical units, may present themselves. In this chapter, however, synthesized speed perturbations, which are assumed to accurately represent the true rotor speed perturbations, are used as the input to the PSS. This means that the same basis and procedure as that outlined in Chapter 5 can be employed for the design and tuning of the PSS.
The major factor in the selection of a stabilizing signal for input to the PSS is the requirement that the modes of concern, which may be the local-, inter-area, and possibly the intra-station modes, must be observable by the signal over a wide range of operating conditions. Typically, perturbations in rotor speed, the electric power output, and the frequency at the generator terminals are the commonly-used local signals.
Various types of pre-filters are in use which convert one or more signals derived from variable(s) other than speed into a synthesized speed signal. Such variables are electric power, bus-voltage angle, frequency, terminal voltage and current; some manufacturers develop a ‘speed’ signal from such variables using various techniques.
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- Information
- Publisher: The University of Adelaide PressPrint publication year: 2015