A fast coordinated control method for power system reactive power and voltage adapting to multiple energy sources

Abstract

The invention discloses a rapid coordination control method for reactive voltage of a power system adapting to multi-energy access. According to the control method, only continuous reactive compensation equipment is controlled under the condition that a threshold reactive power / voltage state meets a superior automatic voltage control (AVC) system issuing index; control objects are reduced; the online computation time is shortened; when the threshold reactive power / voltage state does not meet the superior AVC system issuing index, reactive power margin indexes of a wind power plant step-up transformer and concentrated grid substations of small hydropower stations are introduced into an optimal object, so that the reactive power compensation amount is reasonably distributed among a junction station, the concentrated grid substations of the small hydropower stations and the wind power plant step-up transformer; the action frequency of discrete reactive power equipment can be effectively reduced by the provided discrete variable warping rule; and the rapid coordinated compensation effect is achieved by discrete and continuous reactive power equipment.

Description

technical field [0001] The invention belongs to the technical field of power system control, and relates to a power system coordination control method, in particular to a power system reactive voltage fast coordination control method adapting to the access of multiple energy sources. Background technique [0002] With the rapid development of my country's clean energy industry, the scale of new energy production is increasing year by year, and the impact of intensive access to new energy on the power grid is also increasing. The randomness of output of fluctuating power sources such as wind power and small hydropower makes the task of reactive power and voltage control of regional power grids difficult. Although new energy sites are often equipped with continuous reactive power compensation equipment (such as SVC, SVG, etc.), due to high construction costs, The configuration capacity is relatively small; secondly, the discrete reactive power equipment commonly configured in ...

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Problems solved by technology

Another scholar proposed a multi-time scale reactive power compensation equipment coordination strategy based on the grid operation plan and wind farm power forecast information, but this method requires too high accuracy of wind power forecast information

In addition, the above studies are all aimed at the coordination strategy of reactive power equipment in a single wind farm, without considering the coordinated control process of reactive power compensation equipment between wind farms and between wind farms and regional power grid hub stations

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