A case study on the impact of phase-locked loop (PLL) on the control and behavior of TCSC during unbalanced three-phase conditions is discussed in this paper. For this study, PSCAD/EMTDC platform is used to simulate a TCSC-based compensation in the transmission line. One PLL is taken ...
The phase locked loop (PLL) is an important control unit of the QPP control scheme. To obtain accurate phase information and frequency of the input supply, the dqPLL method has been proposed. The proposed structure uses the coordinate transformation of 3-phase voltages form ab-c to d-q and...
The control strategy proposed uses the instantaneous reactive power theory (p鈥搎 theory) and phase-locked loop (PLL). The p-q theory uses two virtual axes in the Park Transformation, which provide to the control system a good dynamic response, accuracy, and decoupling between the control and...
This paper analyses, the effect of the phase locked loop (PLL) controller in the stability of the voltage source converter(VSC) in a microgrid or when connected to a weak AC grid. While designing the controller for PLL, it may not be possible to consider the effect of the load and ...
A software phase-locked loop (SPLL) has been proposed in literature to obtain phase and frequency information of the grid voltage. Either a lead/lag filter or a proportional-plus-integral (PI) controller is employed to control the performance of the SPLL. In this paper, a criterion to ...
Accordingly, researchers have proposed equipment-based approaches [11,12,13,14]. An equipment-based approach reported in [11] combines control methods to suppress sub-synchronous oscillations (SSOs). Herein, a damping controller that can be integrated with the control loop of a battery energy stor...