AGC control method for asynchronous power grid with multiple DC lines

Abstract

The invention discloses an AGC control method for an asynchronous power grid with multiple DC lines. When an AGC control model of a provincial control area is established, DC converter stations and matching units under the jurisdiction of a power dispatching control sub-center inside a provincial power grid are used as AGC internal equipment of the provincial control area, and the units and DC lines under the jurisdiction of the power dispatching control sub-center are not considered as connecting line borders. The invention aims at reducing the influence of the measurement quality on the AGCof the provincial control area after the number of equipment of the power dispatching control sub-center increases day by day. The problem that the failure of the equipment of the power dispatching control sub-center may lead to the reverse regulation of AGC in the provincial control area is solved. Through coordinated control on the power dispatching control sub-center and the AGC of the provincial control area, two-level dispatching integrated coordinated control is ensured, and the daily operation pressure of dispatchers is reduced. Therefore, the operation efficiency of the power grid is improved, and the safe and stable operation ability of the power grid is enhanced.

Description

technical field [0001] The invention relates to an asynchronous power grid AGC control method including a plurality of direct current lines, and belongs to the technical field of power grid regulation. Background technique [0002] The distribution of energy resources and consumption in China is unbalanced. In order to achieve a wider range of water and fire mutual aid, wind and solar complementarity, large-scale transmission and optimized configuration, it is necessary to vigorously develop UHV DC transmission technology suitable for long-distance and large-capacity transmission. With the continuous operation of DC lines and the rapid growth of DC transmission capacity, the power grids at both ends of the DC transmission and receiving ends are faced with the problem of difficult operation and maintenance of the automation system caused by the large number of DC line equipment. Some DC converter stations only have a single The data source is directly collected, and the exist...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of asynchronous power grid AGC control method that contains a plurality of DC lines, solve the stability that the AGC control of the provincial power grid in the prior art depends entirely on the operation of the dispatching automation system, and at the same time Dispatchers have high operational requirements, which may easily lead to technical problems of AGC suspension or miscontrol

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