Incorporation of voltage stability operating limits in composite system adequacy assessment: BC Hydro's experience

1998 ◽  
Vol 13 (4) ◽  
pp. 1279-1284 ◽  
Author(s):  
W. Li ◽  
Y. Mansour ◽  
E. Vaahedi ◽  
D.N. Pettet
Keyword(s):  
Voltage Stability ◽  
Composite System ◽  
Operating Limits ◽  
Adequacy Assessment

Voltage Stability Assessment Techniques for Modern Power Systems

2020 ◽  
pp. 128-176 ◽  
Author(s):  
Mahiraj Singh Rawat ◽  
Shelly Vadhera
Keyword(s):  
Power Systems ◽  
Electricity Market ◽  
Voltage Stability ◽  
Renewable Energy Sources ◽  
Primary Objective ◽  
System Stability ◽  
Stability Assessment ◽  
Utility Companies ◽  
Operating Limits ◽  
Assessment Techniques

In recent times, most of the power systems are made to operate close to their operating limits owing to various reasons like slow pace of transmission line expansion, environmental constraints, deregulated electricity market, etc. Therefore, the issue of maintaining the system stability has become the primary objective of the utility companies. The recent development and integration of renewable energy sources have further pushed the modern power systems to system security risks. The voltage instability had been the major cause of recent blackouts around the world. The timely assessment of voltage stability can prevent the blackouts in the power systems. This chapter explores the classical as well as newly developed static voltage stability assessment techniques proposed by various researchers in recent years. Also, the chapter cater to the needs of undergraduate as well as graduate students, professional engineers, and researchers who all are working in the domain of power system voltage stability.

Coordinated Optimization and Control Technology between Active and Reactive Power

2012 ◽  
Vol 614-615 ◽  
pp. 944-948
Author(s):  
Ya Ping Li ◽  
Ke Wang ◽  
Dan Zeng
Keyword(s):  
Voltage Stability ◽  
Reactive Power ◽  
Active Power ◽  
Control Technology ◽  
Active And Reactive Power ◽  
Coordinated Optimization ◽  
Operating Limits ◽  
Optimization And Control ◽  
Mechanism Of Interaction ◽  
And Control

As the coupling between active and reactive power is enhanced along with the expansion of the grid scale and the AC-DC hybrid operation, voltage stability is not only closely related to reactive power, but also related to active power. By the constraints of generator power circle and its operating limits, the mechanism of interaction between the active and reactive power is clarified. Also, the hierarchy structure of coordinated optimization and control technology between them is established, and an improved AGC control strategy consideration to static voltage stability is proposed. By optimizing the active power output of the AGC unit, the dynamic reactive power reserve capacity of each unit is improved and the system voltage is supported. The strategy is verified through a variety of experiments on the IEEE-39 bus system.

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