Power grid planning method based on dynamic reliability probability index of power grid

Abstract

The invention provides a power grid planning method based on a dynamic reliability probability index of a power grid. The method comprises: determining a pre-selection planning design scheme and inputting a parameter; carrying out load flow calculation of normal operation of a power system and simulating fault system transient stability calculation; checking a fault shedding load capacity; carrying out reliability probability index calculation on an event causing security loss of a power grid; carrying out comparison and selection of optimization schemes comprehensively to obtain a final grid planning scheme. With the method provided by the invention, the optimal scheme enables a power accident caused by a fault shedding load capacity to be avoided; and a phenomenon that a planning scheme that only needs to use or adjust security control measures fail to be selected can be prevented to a certain extent. Meanwhile, the short-term grid planning method based on the dynamic reliability probability index of the grid has the great practical guidance significance and application value. The method having high computability and wide adaptability is suitable for dynamic reliability evaluation of the large-scale power system and can be used as a main analysis tool for a scheduling operation and plan design department.

Description

technical field [0001] The invention relates to a judgment method in the field of simulation and calculation of a power system, in particular to a power grid planning method based on a dynamic reliability probability index of a power grid. Background technique [0002] In traditional power grid planning, the N-1 principle in the "Guidelines for Power System Safety and Stability" is generally used as the standard, and a large number of power flow, static safety, and transient stability are carried out for each level year, various planning schemes, and various operating modes. , dynamic stability, serious fault check and other simulation calculations. The target grid structure meets the first-level stability standard of the "Guidelines". When the system is disturbed by serious faults, it is allowed to take measures such as machine cutting and load shedding if necessary, but there is no clear regulation on the amount and degree of load shedding. [0003] The "Regulations on Em...

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Problems solved by technology

The target grid structure meets the first-level stability standard of the "Guidelines". When the system is disturbed by serious faults, it is allowed to take measures such as machine cutting and load shedding when necessary, but there is no clear regulation on the amount and degree of load shedding

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