Wide Area Predictive Control of Power System Considering Communication Delay and Data Drops

Mahish, Priyatosh; Pradhan, Ashok Kumar; Sinha, A.K.

doi:10.1109/tii.2018.2876504

“…Now, the phase compensation design for G D (s), can be done in the similar lines as done for G DP (s). As the delay transfer function (14) contains probability information, we call the new vertex compensators as vertex probabilistic compensators (Po-VCs):…”

Section: A Variable Delay Compensation: A-podcmentioning

confidence: 99%

“…Basically, two approaches are followed for delay compensation, one is the prediction of signal, and the other is phase compensation. In [14], [15], prediction-based delay compensation has been proposed. However, in this method, the resolution of delay compensation is limited by the sampling rate of the WAMS signal.…”

Section: Introductionmentioning

confidence: 99%

Variable-Delay and Package Drop Compensation for Data-Driven Wide-Area Power System Stabilizer

Mishra¹

2022

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0

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<p>This paper presents a delay and a data-drop compensator to address the variable latencies which arise in a wide area damping controller (WADC). The vulnerability of data-driven control (DDC) based WADC to these latencies is specifically highlighted. The uniqueness of the proposed delay compensator is that it is designed to address not only the large deviations in delay mean value but also the variations around the mean value. This is achieved by reformulating the delay in terms of its mean value and distribution around the mean value. Further, a new approach is followed for data-drop compensation, in which the nonlinearity in power systems is considered. The proposed data-drop compensation uses the technique of dynamic linearization (DL) and pseudo partial derivative (PPD). Rigorous analysis has been carried out to observe the effect of variable delay and data-drop on the damping performance of DDCWADC. It is shown that the damping performance of DDCWADC improves when the proposed compensation techniques are used. Further, the proposed delay compensator and the nonlinear system based data-drop compensator achieves improved compensation than the customary ones.</p>

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“…Recently some of the research efforts have focused on data-drop compensation in the feedback signal [14], [15]. In [14], a centralized H ∞ based WADC has been proposed where the control actuators are thyristor controlled series compensations (TCSC). The data-drop are compensated by using a weighted recursive least square estimation.…”

Section: Introductionmentioning

confidence: 99%

Variable-Delay and Data-Drop Compensation in Data-Driven based Wide-Area Damping Control

Mishra¹

2022

Preprint

0

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<p>This paper presents a delay and a data-drop compensator to address the variable latencies which arise in a wide area damping controller (WADC). The vulnerability of data-driven control (DDC) based WADC to these latencies is specifically highlighted. The uniqueness of the proposed delay compensator is that it is designed to address not only the large deviations in delay mean value but also the variations around the mean value. This is achieved by reformulating the delay in terms of its mean value and distribution around the mean value. Further, a new approach is followed for data-drop compensation, in which the nonlinearity in power systems is considered. The proposed data-drop compensation uses the technique of dynamic linearization (DL) and pseudo partial derivative (PPD). Rigorous analysis has been carried out to observe the effect of variable delay and data-drop on the damping performance of DDCWADC. It is shown that the damping performance of DDCWADC improves when the proposed compensation techniques are used. Further, the proposed delay compensator and the nonlinear system based data-drop compensator achieves improved compensation than the customary ones.</p>

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“…The communication time delays caused by the data transmission and the network traffic degrade the control performance of the controlled system [20]. In recent years, several papers have considered communication delay in designing model predictive controllers [6, 7]. However, the communication delay is assumed to be equal for all outputs.…”

Section: Introductionmentioning

confidence: 99%