Multi-area interconnected power network ultra-high voltage tie line power control method and controller

Abstract

The invention discloses a multi-area interconnected power network ultra-high voltage tie line power control method. The method comprises the steps that the ACE and the ultra-high voltage tie line power deviation delta PUHV in an area are collected in real time; if the ACE is larger than a safety stability threshold value, the frequency modulation set output variable quantity configured in the area is adjusted and controlled; and the MT index value of the area is computed according to the ACE and the delta PUHV, whether the MT index value of the area surpasses an MT index threshold value is judged, and if the MT index value in the area surpasses the MT index threshold value, the frequency modulation set output variable quantity configured in the area is adjusted and controlled. A hierarchical control concept is used, the frequency safety of the area is guaranteed through the ACE index first, then by using the MT control performance evaluation index divided in areas, coordination control on each area through a frequency modulation set configured in each area is achieved, power fluctuation on a main tie line is effectively suppressed, adjusting efficiency is high, and action frequency is low.

Description

technical field [0001] The invention belongs to the technical field of power system frequency modulation and automatic power generation control, and in particular relates to a power control method and controller for UHV tie lines of multi-area interconnected power grids. Background technique [0002] The multi-regional interconnection grid refers to the figure 1 The power grid with the structure shown is composed of several large regional power grids (such as the regional power grids A and B in the figure, such as the Central China and North China power grids in China), and each large regional power grid is composed of many interconnected regional power grids (generally The provincial power grids under the regional power grid are generally connected by ordinary tie lines, while the regional power grids are generally connected by high-voltage and high-power transmission lines such as UHV tie lines. This structure is the general structure of my country's power grid. [0003]...

AI Technical Summary

Problems solved by technology

Therefore, in the current power system, special units are generally designated or added for constant power control to suppress power fluctuations in UHV tie lines, and the control effect and economy are poor.

Images