Whole substation state evaluation method suitable for multi-voltage-class transformer substation

Abstract

The invention discloses a whole substation state evaluation method suitable for a multi-voltage-class transformer substation. The method comprises the following steps: (1) analyzing a whole substation wiring mode of a substation, and establishing a multi-level load level model; (2) carrying out anticipated accident analysis on substation equipment according to a substation wiring mode; (3) calculating expected power supply and shortage of each device in the transformer substation; (4) according to the calculated expected power supply and shortage, arranging the expected power supply and shortage from small to large, and obtaining a risk sequence of each device; and (5) according to the size of the risk sequence, correcting an original weight value in the whole substation and interval state evaluation guide rule of the transformer substation, and determining the current whole substation state of the transformer substation according to the reference value range of the evaluation index where the corrected weight value is located. The evaluation method can be suitable for transformer substations of various voltage classes, fills the blank of lack of physical evaluation indexes in whole station state evaluation of the transformer substations, and is beneficial to improving the evaluation capability of a power operation and maintenance department on the whole station state of the transformer substations.

Description

technical field [0001] The invention belongs to the technical field of state evaluation of power system equipment, and in particular relates to a method for evaluating the state of a whole substation applicable to multiple voltage levels. Background technique [0002] As a place where the power system receives and distributes electric energy, the substation plays a key role in the operation of the power grid. With the increase in the number of main equipment in substations and the diversification of voltage forms and voltage levels, it will be of great significance to ensure the safe and stable operation of the national grid by accurately and effectively evaluating the operation status of the whole substation by finely controlling the operation status of the main equipment in the substation. important practical significance. [0003] At present, there are many researches on the evaluation methods of the whole substation status. Chinese patent CN107633341A discloses a syste...

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Problems solved by technology

This patent is only for real-time evaluation of the operation status of the secondary equipment communication network of the substation at the present stage, and it is impossible to conduct a fine evaluation of the status of the entire substation

[0004] In view of the lack of quantitative evaluation of the physical quantity of the whole substation state in the existing research, it is impossible to distinguish the influence degree of equipment in different locations and different operating states in the substation on the whole substation, and there is even a lack of evaluation of the general state of substations with various voltage levels method

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