Accurate load control method taking economical efficiency and multi-time scale safety and stability into account

Abstract

The invention discloses an accurate load control method taking economical efficiency and multi-time scale safety and stability into account, and belongs to the technical field of electric power systems and automation thereof. In order to solve the safety and stability problem of different time scales of a system in the fault development process, load shedding measure cost and electric safety accident liability cost are calculated, transient generalized economic loss, quasi-steady-state generalized economic loss and steady-state generalized economic loss indexes are built, and millisecond, second and minute coordinating accurate load control is realized. Electric power system scheduling operating staff can grasp safety operation rules of the system with complicated faults on different time scales, and adaptability of an existing load control method of three defense lines is improved, so that safety and stability control effectiveness and lean level of a large power grid are improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a precise load control method considering economy and multi-time scale safety and stability. Background technique [0002] During the transition period of UHV power grid construction, the contradiction of "strong direct current and weak AC" in the power grid is prominent, and the proportion of UHV DC transmission capacity in the scale of the receiving end system continues to increase. Voltage problems and frequency problems are highlighted. In view of the power shortage caused by large disturbances in the receiving end power grid, in order to prevent stability damage, the safety and stability control device will be adopted to implement load shedding control measures according to the predetermined load shedding strategy; for accidents such as frequency and voltage abnormalities in the power system, low frequency Low-vo...

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Problems solved by technology

[0004] The purpose of the present invention is: aiming at the deficiencies of the prior art, improve the adaptability of the load control method to the comprehensive safety, stability and economy of the transient state and the steady state, and avoid the follow-up stability problems of different time scales caused by solving the single stability problem after the fault, To solve the problems of low load shedding efficiency and high economic cost, a precise load control method considering economy and multi-time scale safety and stability is proposed

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