Dynamic load dispatch with voltage security and environmental constraints

A Linear Programming (LP) based approach is applied to dynamic load dispatch of electric power systems considering security and environment constraints. In addition to the basic constraints (such as generator real power limits and real power demand), a comprehensive set of constraints are considered including transmission line capacity limits, generators dynamic ramp rate, voltage security margin and/or environmental issues. The Voltage security margin, which is calculated using the modified N-R continuation method, is considered heuristically through the control of transmission line capacity limits during the solution process by the LP, and the environmental issue is considered as an operating constraint which has restrictions on hourly SO, emission allowances. Application results of the proposed algorithm to the New England test system are presented to numerically illustrate the effectiveness of the approach. (C) 1997 Elsevier Science S.A.