Enhancement of Power System Stability Using Adaptive Combinational Load Shedding Methods

摘要: In the modern power systems operating at lower stability margins, conventional non-adaptive schemes cannot offer adequate protection for securing system, especially against combinational events. For major disturbances, active deficit is usually accompanied by reactive and frequency voltage of system are jeopardized simultaneously. this paper, three adaptive load shedding methods proposed to improve operation underfrequency scheme in order enhance following severe disturbances. The use locally measured signals counteract such algorithms, started from locations which have higher decay longer period time. speed, location, amount changed adaptively depending on disturbance status rate decline. Operation been simulated an actual large network. Obtained simulation results confirm that provide considerable enhancement margin, using various blackouts could be prevented.