Reactive power collaborative optimization regulation and control method, device and system for wind and light storage field station group

Abstract

The invention relates to a reactive power collaborative optimization regulation and control method, device and system for a wind and light storage station group, and belongs to the technical field of reactive power regulation and control. A power grid reactive power / voltage / power factor instruction issued by a dispatching master station is received; and carrying out optimization calculation on the basis of considering the terminal voltage of the station, the reactive response time and the loss of the collection line, and determining a reactive instruction of each wind and light storage station. Aiming at the reactive power collaborative optimization regulation and control of the wind and light storage station group, instead of a single station or a single type of station group, the reactive power loss on the line is further considered on the basis of simply considering proportional distribution in the existing literature, the reactive power vacancy in the regulation and control process is made up, and the regulation and control efficiency is improved. And reactive adjusting quantity correction of station endpoint voltage, reactive response time and station reactive adjustable margin is comprehensively considered, so that reactive coordination control among the wind and light storage station groups is realized.

Description

technical field [0001] The invention relates to the technical field of reactive power regulation, in particular to a method, a device and a system for the coordinated optimal regulation and control of reactive power of a wind and solar storage station group. Background technique [0002] In recent years, with the continuous decline in the cost of electricity of new energy power stations such as wind power and photovoltaics, new energy power stations have rapidly embarked on the road of large-scale development. With the development of large-scale new energy stations, the wind and solar storage station group is also a hot trend in the future. [0003] The development of power electronics technology has made the doubly-fed wind power generation technology more and more mature. The decoupling control of active and reactive power can be realized through the vector control of the converter. While sending active power to the grid, it can provide a certain amount of reactive power, ...

AI Technical Summary

Problems solved by technology

[0008] 1. For the problem of real-time collaborative optimization and control of wind-solar storage station clusters for reactive power control needs, existing research has not considered the cluster characteristics of large-scale wind-solar storage stations and the adjustment characteristics of different types of reactive power devices inside the station. For example, the influence of reactive power response rate on the final reactive power distribution, and there are few studies on the coordinated control of wind-solar-storage combined systems, which mainly focus on the active power optimization control of energy storage, and fail to consider the requirements of reactive power regulation and wind power and photovoltaic power generation. coordination

[0009] 2. The existing technology does not consider the reactive power deviation of the grid command under the response of each reactive power compensation device in the station group, mainly including the reactive power loss between each station and the collection point

[0010] 3. Most of the existing technologies only consider the situation of the voltage command issued by the grid, and do not consider the power factor and reactive power command.

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