A Coordinated Active Power Control Method for New Energy Combined Power Generation System Including Energy Storage

Abstract

The invention discloses an active coordination and control method for a new energy combined power generation system containing an energy storage system. The method comprises the steps of (1) acquiring real-time data from a supervisory control and data acquisition (SCADA) system and updating the information of an AGC model; (2) calculating the control goal of a combined power generation system in the currently control scenario according to the control scenario in which the combined power generation system currently participates the AGC process; (3) calculating the currently maximum admissible new energy generating margin of an energy storage system; (4) according to the ultra-short-term power predicted value of the new energy and the currently maximum admissible new energy generating margin of the energy storage system, decomposing the overall control goal of the combined power generation system that is obtained through the calculation process during the step (2), and respectively calculating the control goal of a new energy generating system and the control goal of the energy storage system; (5) verifying and checking instructions for each control object obtained through the calculation process during the step (4), and issuing final control instructions after ensuring the instructions are error-free. According to the technical scheme of the invention, the energy storage system is effectively utilized to quickly absorb and release the electric energy, so that the control object can be quickly and accurately tracked.

Description

technical field [0001] The invention relates to an active power coordination control method of a new energy combined power generation system including energy storage, and belongs to the technical field of automatic power generation control of electric power systems. Background technique [0002] With the rapid development of my country's new energy industry, renewable energy such as wind energy, solar energy, ocean energy and geothermal energy are widely used in power system power generation, and the proportion is increasing. However, this type of new energy power generation is random, Intermittent and other characteristics make its development and utilization restricted. The energy storage system / device can quickly realize the absorption and release of active power, making intermittent and highly volatile renewable new energy "adjustable and controllable". Therefore, the combined power generation system formed by the combination of new energy and energy storage provides an ...

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Problems solved by technology

This method neither realizes the priority consumption of wind and solar resources, nor considers the operation performance of the energy storage system, which may cause excessive charging and discharging of the energy storage system

[0004] The publication number is: 102709954B, the publication date is: 2014-07-16, and the patent name is: Active Power Coordination Control Method for Wind-Storage-Storage Combined Power Generation System. A group coordination control method is proposed, but the maximum acceptable energy storage system is not given. The calculation method of the margin, and the control strategy of the wind control group and the storage control group did not take into account the actual power generation capacity of new energy

When the system control target is higher than the actual output level of new energy, the energy storage system will bear huge adjustment pressure, resulting in over-regulation of energy storage, which not only affects the operating life of the energy storage battery, but also reduces the short-term impact of energy storage on the combined power generation system. Supporting capacity

[0005] To sum up, although the above-mentioned patents involve the coordinated control of new energy and energy storage systems, they do not consider the impact of the actual power generation capacity of new energy on energy storage control under different operating conditions, which may lead to failure of new energy power generation. Full utilization may also lead to excessive charging and discharging of the energy storage system, affecting the service life and adjustment ability of the energy storage system

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