Assistant decision-making method for fast branch overloads in plan security check

Abstract

The invention provides an assistant decision-making method for fast branch overloads in plan security check, which belongs to the field of plan security check in the simulation analysis and calculation of power systems. The method comprises the following steps: aiming at the overload situations of lines and transformers in ground-state power flow analysis or static security analysis, calculating active power shift distribution factors of each power generator and load to a branch through using the steady-state data of a power grid and adopting a direct-current power flow method; through adopting a practical calculation formula, calculating power generation and load quantities required to be regulated for overload elimination; and then, sequentially regulating an output and a load according to the power shift distribution factors, and carrying out power flow check so as to achieve the purpose of overload elimination. According to the invention, assistant decision-making information can be provided for branch overload situations occurring in ground-state power flow analysis or static security analysis, therefore, the method is applicable to an online security assessment system and a plan security check system, and also applicable to an offline-mode calculation, and can greatly improve the intelligentization and automation levels of the simulation analysis and calculation of power systems.

Description

technical field [0001] The invention belongs to the field of power system simulation analysis and calculation, and in particular relates to a fast branch overload auxiliary decision-making method for planning safety check. Background technique [0002] The safe and reliable operation of the power grid is of great significance to social and economic development. With the continuous expansion of the grid scale, the continuous commissioning of generator sets, and the continuous access of UHV power transmission and renewable resource power, the grid wiring is becoming more and more complicated, and the planned maintenance of grid equipment is becoming more and more arduous and difficult. Plan safety check needs to form a set of convergent power flow data based on similar daily power flow data, power generation plan, load plan and equipment maintenance plan, and then perform detailed safety and stability analysis and calculation on this set of data. Power flow analysis and stati...

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Problems solved by technology

[0004] Among the above methods, method 1) has relatively high requirements for calculation personnel, and requires calculation personnel to have high professional quality, rich practical experience, high familiarity with power flow data and proficient adjustment ability, and for different The method of adjustment is not completely consistent with the power flow data; and the algorithm of method 2) must match the method of static security analysis. For static security analysis using compensation method, sensitivity method, and DC power flow method, different auxiliary decision-making algorithms are required

Therefore, the coupling between the static safety analysis module and the sensitivity analysis module is too strong, which is not conducive to its application in the planned safety check system

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