Synchrophasor Measurement-Assisted System Integrity Protection Scheme for Smart Power Grid

[摘要] Rapid penetration of novel cutting-edge technologies into power grids has paved a way for new opportunities besides challenges. Though the conventional system integrity protection schemes (SIPS) are performing well, they may not be adequate for the high-end protection of smart power grid (SPG) due to increasing complexity. This paper proposes a synchrophasor measurement-assisted SIPS method for the high-end protection of SPG. It employs synchronized voltage and current phasor data, acquired at phasor data concentrator (PDC) of wide-area supervisory protection system (WASPS) from all phasor measurement units (PMU), to detect the disturbance, identify disturbed area and locate the sensitive region (SR). Further, the proposed scheme classifies fault and stressed conditions using the estimated peak time (Tp_est) and time of settling (Ts_est) from the voltage phasor oscillations. The functioning of the proposed method has been illustrated through various case studies carried on Kundur’s two-area model. Furthermore, the efficacy of the proposed method has been validated on the New England IEEE-39 bus system in MATLAB/Simulink environment. The results show that the proposed method is efficient in enhancing the system integrity protection (SIPS) and situational awareness (SA) in SPG. In addition, it improves the protection system reliability (PSR).

[学科分类] 自动化工程

[关键词] Synchrophasor measurement unit (PMU);Synchrophasors;Power system integrity;Protection system reliability;Situational awareness