This chapter is intended to discuss the most general approach to harmonic studies, which can be applied to shunt FACT devices and to all devices regulated by means of power electronic switches, such as wind power plants. This approach is supported by international standards. Some specific installations may require special considerations that are not addressed in detail in this chapter; however, specific references are provided for further reading whenever these special conditions are identified.

Chapter Contents:

• 5.1 Introduction
• 5.2 Overview of harmonic concerns for shunt FACT devices and chapter content
• 5.2.1 Resonance conditions
• 5.2.2 Frequency scans
• 5.3 Power system model
• 5.3.1 Power system components
• 5.3.1.1 Selection of operating conditions and calculation of frequency scans
• 5.3.1.2 Calculation of impedance points
• 5.3.1.3 Calculation of impedance sectors
• 5.3.2 Background voltage distortion
• 5.3.2.1 Determining the harmonic spectrum
• 5.3.3 Conclusions on system model
• 5.4 Shunt FACT device model
• 5.4.1 Static VAr compensator (SVC)
• 5.4.1.1 TCR harmonic model
• 5.4.1.2 Consistent and nonconsistent harmonic spectrum
• 5.4.1.3 SVC harmonic model
• 5.4.2 Static synchronous compensator (SSC or STATCOM)
• 5.4.2.1 STATCOM as source of harmonics
• 5.4.2.2 STATCOM harmonic model
• 5.4.3 High-voltage dc (HVDC) transmission
• 5.4.3.1 HVDC as source of harmonics
• 5.4.3.2 HVDC harmonic model
• 5.4.4 Conclusions on shunt FACT device model
• 5.5 Harmonic studies
• 5.5.1 Harmonic-performance studies
• 5.5.1.1 Motivation and quality indices
• 5.5.1.2 Procedure
• 5.5.1.3 Verification of compliance
• 5.5.2 Harmonic rating studies
• 5.5.2.1 Motivation and standards
• 5.5.2.2 Procedure
• 5.5.2.3 Verification of harmonic ratings
• References

Inspec keywords: power electronics; flexible AC transmission systems; power system harmonics

Other keywords: wind power plants; shunt flexible ac transmission; harmonic study; shunt FACT devices; power electronic switches; international standards

Subjects: a.c. transmission; Power supply quality and harmonics; Power electronics, supply and supervisory circuits; Power convertors and power supplies to apparatus