Topology search-based provincial power grid coordination voltage control generalized gateway automatic generation method

Abstract

The invention relates to a topology search-based provincial power grid coordination voltage control generalized gateway automatic generation method, which belongs to the technical field of automatic voltage control of a power system. The method comprises the following steps: determining voltage classes of a power side and a load side in a target region; eliminating all lines on a non-load side and all switches in unclosed states on the load side in the target region; generating connection relation between all remaining lines, closed switches and all transformers and a bus; performing depth-first topology search to form a topological island; forming a coordination area if a load side bus and a power side transformer are included in the topological island; forming a generalized gateway by all transformers in each coordination area; searching upwards from a high-voltage winding of the generalized gateway to form records of the power side bus of the coordination area; and forming a coordination area name according to a power plant where the generalized gateway included by the coordination area is positioned. The method guarantees the effectiveness of the provincial power grid coordination control and improves the voltage stability of the system.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, and in particular relates to a method for automatically generating generalized gateways for network-province coordinated voltage control based on topology search. Background technique [0002] The automatic voltage control system is an important means to achieve safe (increased voltage stability margin), economical (reduced network loss), and high-quality (increased voltage qualification rate) operation of the power grid. Connectors and reactive power compensation equipment to achieve a reasonable distribution of reactive power and voltage in the grid. [0003] So far, there are three main modes of mainstream automatic voltage control in the world: [0004] The first is the secondary control represented by the German RWE power company. There is no so-called partition control, and the optimization calculation results of the optimal power flow (OPF) are ...

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Problems solved by technology

[0010] 2. Electromagnetic ring network is ubiquitous

For provinces with a relatively complete 220kV network, such as Jiangsu and Zhejiang, each 220kV power grid basically operates radially, and the coordination gateway is easy to divide, that is, the 500kV transformer at the border of the grid province, and the coordination area includes the upstream power bus of the 500kV main transformer and the 500kV main transformer from top to bottom. , 220kV line and load bus under the main transformer; and for provinces where 220kV is developing rapidly, the 220kV power grid is partially looped, and it is difficult to divide and coordinate the gateway intuitively

Improper division of coordination gates will significantly affect the effect of AVC control, and even threaten the grid voltage stability

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