Capacitor Bank Series Group Shorting (CAPS) Design Study : Final Report.

Technical Report · Sun Mar 01 04:00:00 EST 1998

OSTI ID:355052

Bruns, D P; Miske, Jr, S A; Newcomb, G ^[1]; Taylor, C W; Lee, G ^[2]

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1. GE Power Systems Energy Consulting, Schenectady, NY (United States)
2. Bonneville Power Administration, Portland, OR (United States)

The possibility of voltage collapse is a concern in many areas of the power system. Among the solutions to this problem are the addition of reactive compensation in the load area. Because the reactive power output of shunt capacitor banks is proportional to the voltage squared, shunt capacitor banks can increase power system vulnerability to voltage collapse. A new shunt capacitor bank control termed CAPS (CAPacitor bank series group Shorting) has been developed by Bonneville Power Administration (BPA) as cost-effective approach in improving power system stability during under-voltage emergencies. CAPS makes available, for finite periods of time, additional reactive power from a shunt bank by the use of a shorting switch to exploit the time-overvoltage capability of the capacitors. This report documents the results of a design study to optimize CAPS as applied to EHV and HV shunt capacitor banks. The study encompasses all aspects of capacitor bank design: capacitor units, capacitor bank arrangement, switch-gear, fusing (external, internal and fuseless), control and protection, risk assessment and economics. Various design options involving standard, readily available components are examined. The study also examines the feasibility of using electronic switching to enhance the CAPS concept. The study concludes that CAPS can be built from standard, commercially available components and has an economic advantage over conventional shunt capacitor banks with similar reactive power control.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); GE Power Systems Energy Consulting, Schenectady, NY (United States); Bonneville Power Administration, Portland, OR (United States)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 355052
• Report Number(s): EPRI-TR--110273
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
25 ENERGY STORAGE
AC SYSTEMS
CAPACITIVE ENERGY STORAGE EQUIPMENT
CAPACITORS
Capacitor banks - Protection
STABILIZATION
VOLTAGE DROP
VOLTAGE REGULATORS