Voltage stability of microgrids

Voltage stability of microgrids

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This chapter focuses on voltage stability of microgrids. Some control schemes to maintain voltages of all the buses of a microgrid at acceptable levels in normal conditions and after being subjected to disturbances will be presented. Voltage stability enhancement and reactive power sharing in inverter-based microgrids are discussed, including droop-control techniques.

Chapter Contents:

  • 10.1 Introduction
  • 10.1.1 Concept of voltage stability
  • 10.1.2 Voltage stability issues of microgrid
  • 10.1.3 Microgrid voltage stability assessment
  • Static voltage stability analysis
  • P–V and Q–V curves
  • V–Q sensitivity analysis
  • Dynamic analysis
  • Proximity to voltage instability
  • 10.2 Small-signal model of a microgrid for voltage stability analysis
  • 10.3 Voltage stability enhancement
  • 10.4 Case studies
  • 10.4.1 Case study 1
  • Small signal model of the inverter—case study 1
  • Small signal model of the power network—case study 1
  • Small signal model of the load—case study 1
  • Small signal model of the whole system—case study 1
  • Stability analysis—case study 1
  • 10.4.2 Case study 2
  • The synchronous generator model—case study 2
  • The inverter model–case study 2
  • Model of the inverter control system—case study 2
  • Network model—case study 2
  • Model of the whole system—case study 2
  • Voltage stability analysis—case study 2
  • 10.4.3 Case study 3
  • Models of the induction generator and the whole system—case study 3
  • Stability analysis—case study 3
  • 10.4.4 Case study 4
  • The context: current status and future perspective of microgrids in Oman
  • Conclusion and recommendations for case study 4
  • 10.5 Concluding remarks
  • References
  • Further reading

Inspec keywords: distributed power generation; voltage control; power system stability; invertors; power generation control; reactive power control

Other keywords: reactive power sharing; buses; acceptable levels; normal conditions; inverter-based microgrids; voltage stability enhancement; droop-control techniques; control schemes

Subjects: Control of electric power systems; Power electronics, supply and supervisory circuits; Power system control; Distributed power generation; Power and energy control; Stability in control theory; Voltage control

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