Coordinated corrective control for transient stability enhancement in future Great Britain transmission system

Abstract

Abstract-This paper demonstrates a corrective control strategy through fast actuators (TCSC FACTS and HVDC links, both LCC and VSC) in order to enhance the transient stability in the future Great Britain (GB) transmission network. A model predictive control (MPC) scheme that relies on system wide-area measurements is employed for coordinated control action through these power electronic devices with the aim of preserving the system stability without having to constrain prefault transfer levels. Case studies employing detailed dynamic models are presented to demonstrate the effectiveness of the proposed approach for different formulations on a representative equivalent model of the future GB transmission grid.

Effective damping support through VSC-HVDC links with short-term overload capability

“…The deviation of the generator rotor speeds from this value (relative frequency error) was found to provide good performance in [13], [8]. Finally, it is important to highlight in (2e) the constraints on the control variable u(k) according to the short-term overload capabilities of the HVDC converter.…”

“…Although use of VSC-HVDC links for damping support has been extensively covered in the literature, it is often assumed that the converter is operating de-loaded [7], [8] (which can be economically expensive) or that some overload is available without addressing the converter physical limitations [9], [10]. In order to explicitly account for the converter overload constraints in the controller design in this work we use model predictive control (MPC) theory [11].…”

“…In order to explicitly account for the converter overload constraints in the controller design in this work we use model predictive control (MPC) theory [11]. Application of MPCbased damping controllers for HVDC connections has, for instance, been covered in [12] for CSC-HVDC systems and in [13], [8] for VSC-HVDC links. Again, in [13], [8] VSC overload was not considered.…”

Stability and control of mixed AC–DC systems with VSC‐HVDC: a review

“…The control implementation relies on relative frequency error between generators and AC grid. An MPC-based transient stability controller for the representative GB system is proposed as well in [78]. However, the feasibility of implementing such control in the real power system is yet to be assessed since the designing of MPC for large systems is non-trivial.…”

Model Predictive Control-Based AGC for Multi-Terminal HVDC-Connected AC grids

“…MPC has been shown to offer setpoint tracking and robustness performance in a range of power systems applications including secondary frequency control, typically referred to as automatic generation control (AGC) [9]- [11], and voltage control [12], [13]. Additionally, MPC has been suggested for application to the dynamic control of point-to-point HVDC links [14], [15] and for providing predictive optimal power flow for MTDC systems in [16]. Recently it was shown that MPC could be used as a means of improving AGC performance and robustness for ac areas connected to MTDC grids versus decentralised PI based techniques [11], [17].…”