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Stability enhancement issues of power grid

Stability enhancement issues of power grid

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This chapter gives an overview about the basic principle and operation of various shunt, series and series-shunt types of flexible alternating current transmission system (FACTS) controllers. The steady-state power transfer capability can be improved significantly in the power system with various FACTS controllers, and it is the main focus of this chapter. This can be achieved only by optimal placement of FACTS controllers in the network, otherwise they have negative impact on the system. To demonstrate the concept of power-transfer capability enhancement concept under steady-state operating condition, static VAr compensator (SVC) and thyristor-controlled series compensator (TCSC) have been considered. The simulation results were carried out for IEEE 30-bus and the New England 68-bus test systems to check the effectiveness of the algorithm.

Chapter Contents:

  • 14.1 Introduction
  • 14.2 Power-flow control in transmission system
  • 14.2.1 Stability enhancement with shunt and series compensation
  • 14.2.2 Transmission system without compensation
  • 14.2.3 Transmission system with shunt compensation
  • 14.2.4 Transmission system with series compensation
  • 14.2.5 Power transfer capability enhancement with shunt compensation
  • 14.2.6 Power transfer capability enhancement with series compensation
  • 14.3 Classification of FACTS controllers
  • 14.3.1 Shunt controllers
  • 14.3.1.1 Static VAr compensator
  • 14.3.1.2 Thyristor-controlled reactor
  • 14.3.1.3 Thyristor-switched capacitor
  • 14.3.1.4 FC - TCR type static var compensator
  • 14.3.1.5 TSC - TCR type static var compensator
  • 14.3.1.6 Static synchronous compensator
  • 14.3.1.7 Comparisons of shunt compensators
  • 14.3.2 Series controllers
  • 14.3.2.1 Thyristor-switched series capacitor
  • 14.3.2.2 Thyristor-controlled series capacitor
  • 14.3.2.3 Static synchronous series compensator
  • 14.3.2.4 Comparison of series compensators
  • 14.3.3 Combined FACTS controllers
  • 14.3.3.1 Unified power flow controller
  • 14.3.3.2 Interline power flow controller
  • 14.3.4 Summary of application of FACTS controllers
  • 14.4 Optimal placement of FACTS controllers
  • 14.4.1 Optimal placement of static var compensator
  • 14.4.2 Optimal placement of thyristor-controlled series capacitor
  • 14.4.3 Total transfer capability
  • 14.4.4 Optimal rating of static var compensator
  • 14.4.5 Optimal rating of thyristor-controlled series compensator
  • 14.4.6 Particle swarm optimization
  • 14.5 Simulation results
  • 14.5.1 Optimal placement and parameter settings of SVC and TCSC in IEEE 30-bus system
  • 14.5.1.1 Optimal placement of static var compensator
  • 14.5.1.2 Optimal placement of thyristor-controlled series capacitor
  • 14.5.1.3 Total transfer capability
  • 14.5.1.4 Optimal rating of static var compensator
  • 14.5.1.5 Optimal rating of thyristor-controlled series capacitor
  • 14.5.2 Optimal placement and parameter settings of SVC and TCSC in the New England 16-machine, 68-bus system
  • 14.5.2.1 Optimal placement of static var compensator
  • 14.5.2.2 Optimal placement of thyristor-controlled series capacitor
  • 14.5.2.3 Total-transfer capability
  • 14.5.2.4 Optimal rating of static var compensator
  • 14.5.2.5 Optimal rating of thyristor-controlled series capacitor
  • 14.6 Conclusions
  • References

Inspec keywords: thyristors; flexible AC transmission systems; IEEE standards; power system stability; power grids

Other keywords: static VAr compensator; stability enhancement; TCSC; thyristor-controlled series compensator; FACTS; power system; IEEE 30-bus; power grid; SVC; New England 68-bus test systems; flexible alternating current transmission system controllers

Subjects: Control of electric power systems; a.c. transmission; Power system control; Power transmission lines and cables

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