Dynamic method for preventing voltage collapse in electrical pow

Details Dynamic method for preventing voltage collapse in electrical pow Dynamic method for preventing voltage collapse in electrical pow

1995-04-20

1998-08-18

Voeltz, Emanuel Todd

Boots, shoes, and leggings

395915, 307 29, 307 31, 307 38, H02J 314

Patent

active

057966281

ABSTRACT:
Given the current operating condition of a power-generating system (obtained from real-time data), the near-term (e.g., after 25 min.) load demand at each bus (obtained from short-term load forecast) and the generation dispatch (based on economic dispatch), a load margin measure (MW and/or MVAR) is determined in order to assess the system's ability to withstand the forecasted load and generation variations. The invention has a method to predict near-term (e.g., after 25 min.) system voltage profiles. The proposed look-ahead measure and/or the system voltage profiles are then applied to contingency selections for the near-term power system, in terms of load margins to collapse and bus voltage magnitudes. The proposed load margin measure and the voltage profiles are based on the power flow technique and the saddle-node bifurcation theory.

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"Efficient Computational Methods for a Practical Performance Index and the Exact Voltage Collapse Point in Electric Power Systems"; Rene Jean-Jumeau, Hsia-Dong Chiang, Robert J. Thomas, Proceedings of the 31st Conference on Decision and Control, Dec. 1992.

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