A wide-area control system (WACS) uses wide-area measurement signals to provide auxiliary stabilising controls to power system devices. An adaptive WACS has been designed to provide damping control signals to the excitations of generators. The delays in signal transmission and the reliability of the communication network is a major concern with wide-area measurementbased control. The adaptive WACS is designed to compensate for a wide range of communication delays and provide robust damping to mitigate system oscillations. A single simultaneous recurrent neural network is used in the realisation of the adaptive WACS for both identification and control of the power system. The WACS has been implemented on a digital signal processor and its performance is evaluated on a power system implemented on a real-time platform-the real-time digital simulator. The additional damping provided by the WACS is enumerated using Prony analysis. † design of an adaptive WACS to provide auxiliary damping to generators through their excitations; † compensation of transmission delays ranging from 0 to 1.4 s in measured and control signals; † the use of a single simultaneous recurrent neural network (SRN) for both identification and control functions for the WACS design and † demonstration of the real-time implementation of the proposed WACS on a digital signal processor (DSP) interfaced to the real-time digital simulator (RTDS).

No abstract

Abstract-Latency or delay in remote feedback signals can adversely affect the closed-loop damping performance. Accurate time-stamp information at both (PMU location and control center) ends offers a possibility to continuously compensate for time-varying latency. In this paper, an adaptive phasor power oscillation damping controller (APPOD) is proposed wherein the rotating coordinates for phasor extraction are adjusted to account for the change in phase caused due to the delay. The oscillatory component of the original signal is thus retrieved out of the delayed signal received at the control center. Unlike conventional phasor POD, which uses a fixed phase shift to generate damping control signal, an adaptive phase shift algorithm is used here to suit varying signal locations and operating conditions. Case studies confirm the effectiveness of the proposed technique, both in terms of robustness and handling continuously varying delays. A comparison with a conventional gain scheduled POD (CGPOD) and an Unified Smith Predictor (USP) approach is also presented.

No abstract

No abstract