Multi-mode coordination control method applied to wind and light storage new energy power station

Abstract

A multi-mode coordination control method applied to a wind and light storage new energy power station comprises the following steps: a wind and light storage new energy power station control system collects operation data of a wind power system, a photovoltaic system and an energy storage system in real time, and reads limited parameters of the wind power system, the photovoltaic system and the energy storage system; the wind-solar storage new energy power station control system reads a wind-solar storage scene operation mode flag bit issued by the dispatching center, and determines a power control participation mode of the wind-solar storage system; in a wind and light mode, selecting a proportion control mode, a margin control mode, a wind power priority mode or a photovoltaic priority mode to complete power distribution between a wind power system and a photovoltaic system; under the condition that an energy storage system participates in control, instruction tracking, power smoothing, wind and light absorption and peak power supply control modes are fused. According to the invention, the problem of power grid voltage and frequency fluctuation caused by new energy access is smoothed by realizing active collaborative optimization control of the wind and light storage station group, and the stability of new energy grid connection is improved.

Description

Technical field [0001] The present invention belongs to the field of power technology, more specifically, relates to a multi-mode coordinated control method applied to a wind and photovoltaic storage new energy power station. Background [0002] In recent years, China's new energy industry has developed rapidly, which has played an important role in improving the energy structure, protecting the ecological environment and promoting economic development. Due to the intermittent and volatile characteristics of new energy power generation such as wind power and photovoltaic power generation, the problem of voltage and frequency fluctuations in the grid caused by the large-scale intensive development and access of new energy power generation is becoming more and more serious. The introduction of large-capacity energy storage systems is an important means to solve the stable operation of new energy power generation connected to the grid. The application of energy storage systems to b...

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Problems solved by technology

[0003] However, there is a lack of mature experience in the construction and operation of large-scale wind-solar-storage combined power plants at home and abroad. The application scenarios on the user side, power generation side, and grid side are relatively single, and there is a lack of mutual coordination and system optimization. The operation mode of the traditional wind-solar-storage station It is relatively single and extensive, which seriously restricts the safe and efficient operation of the system and the grid-connected consumption of new energy; therefore, it is urgent to break through the real-time coordinated control and protection technology of large-scale new energy wind storage stations; implement the operation mode and Grid-connected control strategy, researching new methods of smart operation and regulation of wind-solar-storage station groups, providing technical support for large-scale new energy-friendly grid-connected and ensuring safe and stable operation of the system

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