دانلود رایگان مقاله انگلیسی یک برنامه مبتنی بر پیش بینی برای کنترل ولتاژ پس از اختلال - الزویر 2018

ABSTRACT

In this paper a predictive scheme for dynamic voltage control is proposed, which maintains voltage security (both voltage stability and voltage profile) of power system, in a wide area manner. The proposed algorithm, upon detecting any voltage violation (both under- and/or over-voltages), employs organized multi-agent system (OMAS) in order to coordinate the employment of reactive power devices in returning voltage magnitudes of all buses to the acceptable range and steady behaviour. In order to achieve high benefits of power system response, each agent takes advantage of a predictive scheme, which is based on the corresponding bus voltage trend. By this predictive characteristic, each agent coordinates its command for remedial action with the prediction of bus voltage destination. Moreover, this predictive characteristic is extended to consider incoming remedial actions (or to compensate the latency in activation of previously decided remedial actions). These predictive characteristics lead to making a smooth waveform and reducing the number of needed remedial actions. The performance of the proposed scheme against different scenarios in Nordic32 test system is presented, where the results illustrate effectiveness and robustness of the proposed scheme.

5. Conclusion

In this paper, a dynamic voltage control under WAMPAC framework has been presented. This scheme, proposed on the basis of organized multi-agent systems (OMAS), is able to eliminate voltage violations (under- or over-voltages) following disturbances in power system, even those leading to voltage oscillations and/or voltage collapse. The novelty of the proposed scheme is in its predictive attributes, i.e. considering voltage trend and compensating the latency of reactive power resources contributions in the process of decision-making for remedial actions against voltage violations. These characteristics have made the proposed scheme to be more efficient with less remedial actions and smaller settling time. Moreover, it proven that the remedial actions successfully implemented by the presence of various latencies without causing any significant deviation in the response. The performance of the presented scheme has been investigated on a test system, comprehensively, under various operating conditions and for different disturbances (load variations and contingencies). The results have shown the ability and superiority of the proposed algorithm in a wide-area and dynamic voltage control approach.