Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 36, Issue 1, Pages 712-721Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2020.3003281
Keywords
Active and reactive power control; power osci-llation damping; VSC-HVDC; multi-terminal
Categories
Funding
- Madrid Regional Government under PRICAM-CM [S2013/ICE-2933]
- Spanish Government under RETOS Project [ENE2014-57760C2-1R, RTI2018-098865-B-C31]
- Madrid RegionalGovernment under PROMINT-CM Project [P2018/EMT-4366]
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High Voltage Direct Current Transmission (HVDC) systems are important in modern electric power systems, and this paper proposes supplementary controllers in multi-terminal HVDC systems to damp electromechanical oscillations. The proposed POD controllers effectively damp the electromechanical modes of interest in the power system and are robust against communication latencies.
High Voltage Direct Current Transmission (HVDC) systems are called to play an important role in modern electric power systems. Among the many aspects of HVDC currently under active research, this paper presents a proposal to design supplementary controllers in multi-terminal HVDC systems based on Voltage Source Converters (VSC-MTDC, for short) to damp electromechanical oscillations (Power Oscillation Damping or POD). In the proposed POD controllers (PODC), each VSC station compares the average of the frequencies measured at the AC connection points of the VSC stations of the MTDC system (frequency set point) with its own AC output frequency. This difference is then used to manipulate the active- (P) and reactive-power (Q) injections of each one of the VSC stations. The proposed PODCs are designed systematically by using a coordinated-design method using the concept of eigenvalue sensitivity, in order to achieve the required damping ratio of a set of electromechanical modes of interest in the power system where the VSC-MTDC is connected. The proposed designed methodology has been tested in the Cigre Nordic32A system with an embedded VSC-MTDC system. Results show that the proposed PODCs are effective damping successfully the electromechanical modes of interest and they are robust against communication latencies.
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