LỰA CHỌN BỘ KÍCH TỪ TRONG MÔ PHỎNG ỔN ĐỊNH VÀ MÔ HÌNH KÍCH TỪ TRÊN PHẦN MỀM PSSE.NỘI DUNG CHÍNH PHẦN 5 (Selection of Exciters): 1. Types of Exciters. 2. Exciter Models in PSS®E. 3. Identification of Typical Exciters.
TRANSMISSION & DISTRIBUTION A Division of Global Power POWER SYSTEM STABILITY CALCULATION TRAINING D2 Sl ti fE it D ay 2 - S e l ec ti on o f E xc it ers November 19, 2013Prepared by: Mohamed El Chehaly eBook for You OUTLINE 2 OUTLINE • Types of Exciters • Exciter Models in PSS®E • Identification of Typical Exciters eBook for You 3 TYPES OF EXCITERS TYPES OF EXCITERS eBook for You Introduction 4 TYPES OF EXCITERS Introduction Important to model excitation system of titl ill genera t ors as it p l ays a cruc i a l ro l e during fast disturbances (first 10 seconds) seconds) Functions of an excitation system: To provide direct current to the synchronous To provide direct current to the synchronous generator field winding To perform control and protective functions essential to the satisfactory operation of the power system To meet the specified requirements for operating To meet the specified requirements for operating flexibility eBook for You Introduction 5 TYPES OF EXCITERS Introduction Performance requirements: Generator considerations: Supply and adjust field current as the generator output varies within its continuous capability varies within its continuous capability Respond to transient disturbances in order to prevent damage of the generator such as: Rotor insulation failure due to high field voltage Rotor insulation failure due to high field voltage Rotor heating due to high field current Stator heating due to high VAR loading Ptidti P ower sys t em cons id era ti ons: Contribute to effective control of system voltage Improve system stability with fast response Improve system stability with fast response eBook for You Principle Scheme of Excitation 6 TYPES OF EXCITERS Principle Scheme of Excitation eBook for You Principle Scheme of Excitation 7 TYPES OF EXCITERS Principle Scheme of Excitation Exciter Provides DC power to the generator field winding Regulator Processes and amplifies input control signals to a level and form appropriate for control of the exciter exciter Terminal voltage transducer and load compensator compensator Senses generator terminal voltage, rectifies and filters it to DC quantity and compares with a reference eBook for You Principle Scheme of Excitation 8 TYPES OF EXCITERS Principle Scheme of Excitation Power system stabilizer Provides additional in p ut si g nal to the re g ulator to pg g damp power system oscillations Limiters and protective circuits Wide array of control and protective functions which ensure that the capability limits of the exciter and the generator are not exceeded exciter and the generator are not exceeded eBook for You Types of Excitation Systems 9 TYPES OF EXCITERS Types of Excitation Systems DC excitation systems Utilize a direct current generator with a commutator as the source of excitation system p owe r p AC excitation systems Use an alternator and either a stationar y or y rotating rectifiers to produce the DC current needed for the synchronous machine field ST excitation systems Excitation power is supplied through transformers Excitation power is supplied through transformers or auxiliary generator windings and rectifiers eBook for You DC Excitation Systems 10 TYPES OF EXCITERS DC Excitation Systems Utilize DC generators as source of power Represent early systems (from 1920s to mid 1960s) S d db AC dST it S uperse d e d b y AC an d ST exc it ers Many are still in service and therefore itb dld requ i re t o b e mo d e l e d eBook for You [...]... values Se(E1) and Se(E2) eBook for You DC Excitation Systems 14 TYPES OF EXCITERS The field voltage values E1 and E2 should normally be chosen near the knee of the exciter’s magnetization curve and near the exciter ceiling eBook for You DC Excitation Systems 15 TYPES OF EXCITERS DC Excitation Systems In order to automatically control the terminal voltage of the machine, a transducer voltage must... VRMAX estimated will not necessarily produce the required excitation system response ratio It may have to be adjusted following the use of the excitation system response ratio test eBook for You Notes 25 TYPES OF EXCITERS Automatic Calculation of DC Exciter Parameters Use automatic determination of VRMAX only once in activity STRT, before executing ESTR and ERUN, to obtain an initial estimate of VRMAX... Potential source rectifier systems eBook for You Bus fed Transformer fed 34 TYPES OF EXCITERS ST Excitation Systems Compound source rectifier systems eBook for You Non-controlled Controlled 35 TYPES OF EXCITERS ST Excitation Systems Extended range of excitation current and voltage Higher signals amplification Very fast response Simplicity of design (occupies small space) D Drawbacks . You OUTLINE 2 OUTLINE • Types of Exciters • Exciter Models in PSS®E • Identification of Typical Exciters eBook for You 3 TYPES OF EXCITERS TYPES OF EXCITERS eBook for You Introduction 4 TYPES OF EXCITERS Introduction . Excitation 6 TYPES OF EXCITERS Principle Scheme of Excitation eBook for You Principle Scheme of Excitation 7 TYPES OF EXCITERS Principle Scheme of Excitation Exciter Provides DC power. You Types of Excitation Systems 9 TYPES OF EXCITERS Types of Excitation Systems DC excitation systems Utilize a direct current generator with a commutator as the source of excitation