access icon free Adaptive wide-area power oscillation damper design for photovoltaic plant considering delay compensation

© The Institution of Engineering and Technology
Received 16/12/2016, Accepted 22/04/2017, Revised 03/04/2017, Published 25/04/2017

With the increasing amount of grid-connected photovoltaic (PV) plants in a power system, the volatility and uncertainty of power generated from PV plants may adversely impact on the power system stability, for example increasing the risk of interarea oscillation. To solve the problem, this study proposes an adaptive wide-area power oscillation damper (WPOD) based on goal representation heuristic dynamic programming (GrHDP) algorithm for PV plant to enhance damping of the concerned interarea mode. By using GrHDP, the adaptive WPOD (A-WPOD) does not need the model of the power system and has adaptivity to different operating conditions. Moreover, an adaptive delay compensator is also employed for the proposed A-WPOD to compensate the communication delay existing in the wide-area signal. Case study is carried out on a 16-machine 68-bus system with a large-scale PV plant. Simulation results show that the A-WPOD can provide satisfactory damping performance and compensate the communication delay over a wide range of operating conditions.

Inspec keywords: photovoltaic power systems; power system stability; dynamic programming; wide area networks

Other keywords: damping enhancement; power system model; interarea oscillation risk; adaptive delay compensator; adaptive wide-area power oscillation damper design; A-WPOD; grid-connected photovoltaic plants; grid-connected PV plants; power system stability; adaptive WPOD; communication delay; large-scale PV plant; 16-machine 68-bus system; wide-area signal; damping performance; adaptive wide-area power oscillation damper; goal representation heuristic dynamic programming algorithm; GrHDP algorithm

Subjects: Computer communications; Solar power stations and photovoltaic power systems; Optimisation techniques; Other computer networks; Optimisation techniques

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