Transient voltage safety prevention and control optimization method considering large number of anticipated faults

Abstract

The invention provides a transient voltage safety prevention and control optimization method considering a large number of anticipated faults, and belongs to the field of transient voltage safety evaluation and control of a power system. According to the method, a transient voltage safety prevention and control optimization model which is composed of an objective function and constraint conditions and considers a large number of anticipated faults is established based on transient voltage drop degree evaluation indexes of measurement nodes according to an initial anticipated fault set; then, a slack variable is introduced into the transient voltage safety constraint of the model, meanwhile, a corresponding penalty term is added into a target function, and the original model is relaxed; and finally, the relaxed model is solved through a successive linearization method to obtain an optimized set value of each reactive power device. According to the optimization model established by the method, the safety constraints of more faults are met as much as possible on the prevention and control level, and the risk of commutation failure of the direct current converter station can be reduced through the optimization result obtained by the method.

Description

technical field [0001] The invention belongs to the field of transient voltage safety evaluation and control of electric power systems, and in particular relates to a transient voltage safety prevention control optimization method considering a large number of anticipated faults. Background technique [0002] In recent years, due to the energy crisis and the needs of environmental protection. Many countries in the world are vigorously developing renewable energy, including wind power generation and photovoltaic power generation. In addition, there is a reverse distribution of energy resources and loads in our country. In order to meet the needs of power loads, west-to-east electricity transmission channels have basically been formed, and several large-scale multi-current sinks have been formed in the eastern and southern load centers. point receiving end grid. The introduction of this series of new technologies has led to the emergence of a large number of power electronic...

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Problems solved by technology

However, the existing research generally only considers a small number of specified fault constraints in the optimization model, or considers adding reactive power compensation equipment in the power grid at the same time, and how to satisfy a large number of expected fault safety constraints of the actual power grid through preventive control still less research

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