Impact Examination on Power System Transient Stability Considering HVDC Overload Capability
Background/Objectives: The application of HVDC system is increasing due to economical large-capacity long-distance transmission, asynchronous linkage, and renewable energy source linkage, and HVDC operation point decision is becoming a research issue for power system engineers.
Methods/Statistical analysis: The operating point of the HVDC should be as close to the rated rating as possible in terms of plant utilization, but this would make the system vulnerable to additional power transfer requirements. In this paper, we studied the improvement of the power system transient stability by transmitting additional power through the overload control of HVDC system.
Findings: In this paper, we showed that large disturbance information such as AC line dropping of the system could be recognized through the communication system like SPS and triggered overload control to solve the unbalance of power by supplying additional power for a short time. The effectiveness of the proposed method was verified using the actual KEPCO transmission system in Korea and the planned HVDC system model.
Improvements/Applications: In the future, it is expected that the proposed method can be developed and applied to HVDC to be installed in Korea to improve both facility utilization and stability.