Unified active and reactive power modulation of HVDC systems: large-signal and distributed small-signal control. Final report

Technical Report · Wed Oct 01 00:00:00 EDT 1986

OSTI ID:5113346

Grund, C E

Advanced HVDC modulation control techniques have been developed and evaluated for the stabilization of torque-angle oscillations of ac/dc networks. Previous work resulted in centralized small-signal modulation control (EPRI Reports EL-2101 and EL-3990). This report covers extensions to decentralized small-signal and large-signal modulation to augment power system steady-state and transient stability, respectively. Decentralized modulation requires a frequency controller at each terminal of a two-terminal dc system. Each modulation signal (dc power and voltage) is produced at the terminal where it is required and therefore it does not have to be transmitted between terminals. Dynamic performance is comparable to a centralized modulation system. Large-signal modulation is developed to maximize the deceleration of machines near the converter terminals by modulating the dc current. Both modulation strategies have been evaluated for dc links connecting synchronous or asynchronous systems based on small-scale power system models. A proposed methodology for applying these techniques to large-scale systems is presented as well as a cost estimate for cost/benefit analyses.

• Research Organization: General Electric Co., Schenectady, NY (USA). Systems Development and Engineering Dept.
• OSTI ID: 5113346
• Report Number(s): EPRI-EL-4822; ON: TI87920081
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
HVDC SYSTEMS
MODULATION
INTERCONNECTED POWER SYSTEMS
STABILITY
POWER DISTRIBUTION SYSTEMS
ALGORITHMS
CONTROL
POWER TRANSMISSION
TRANSIENTS
DC SYSTEMS
ENERGY SYSTEMS
MATHEMATICAL LOGIC
POWER SYSTEMS
200302* - Power Transmission & Distribution- DC Systems- (1989-)