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Stored energy power station optimizing control method with power prediction considered

An energy storage power station, optimized control technology, applied in the direction of AC network load balancing, etc., can solve problems such as inability to cope with wind power fluctuations

Inactive Publication Date: 2014-07-16
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
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Problems solved by technology

[0003] At present, the existing control strategies are all control strategies obtained under the established mode. Due to the uncertainty of wind power output in the future, the existing control strategies may not be able to cope with complex wind power fluctuations

Method used

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  • Stored energy power station optimizing control method with power prediction considered
  • Stored energy power station optimizing control method with power prediction considered
  • Stored energy power station optimizing control method with power prediction considered

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Embodiment Construction

[0055] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0056] Energy-based energy storage represented by lead-acid batteries, supercapacitors and lithium batteries (Li-ion Battery, LiB) has been applied in many current demonstration projects. This type of energy storage has high energy density, long energy storage time, and there are cycles Due to the short life span, the number of charging and discharging state transitions should be strictly limited; the power-type energy storage VRB has the ability to switch between frequent charging and discharging, and the number of charging and discharging times is high, which is suitable for the fluctuation of random components that exhibit frequent and rapid changes. Therefore, LiB in the state of light charge and light discharge will significantly increase its lifespan, and overcharge and overdischarge will seriously affect its operating state. LiB should be operated withi...

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Abstract

The invention discloses a stored energy power station optimizing control method with power prediction considered. The method includes the steps that the control step length of the progressive charge and discharge of a stored energy power station is determined, and a stored energy power station charge and discharge model is built based on the main control strategy and the auxiliary control strategy; a wind power plant stored energy system capacity optimizing target function is built with the optimized operation state of the stored energy power station state of charge (SOC) as the goal, and the charge and discharge power constraint condition and the SOC constraint condition are built; on the condition of meeting the control strategies of the stored energy power station charge and discharge model, solving and computing are conducted on the stored energy system capacity optimizing target function through the PSO algorithm, and the optimized charge and discharge power of the stored energy power station is acquired. The stored energy power station optimizing control method with power prediction considered has the advantages that the charge and discharge converting times of LiB can be reduced effectively on the premise of guaranteeing the operation state of SOC and the leveling effect of all media, the medium features of VRB can be fully played, and the control method is highly efficient and reliable, and certain theoretical value and actual application value are achieved.

Description

technical field [0001] The invention relates to the field of power fluctuation suppression, in particular to an optimal control method for an energy storage power station considering power prediction. Background technique [0002] Renewable energy represented by wind power has inherent properties of intermittent and randomness. With the continuous increase of wind power penetration, it is urgent to enhance the current power grid's ability to cope with wind power fluctuations. The energy storage power station can realize the storage and release of energy, which has become one of the important ways to solve the problem of wind power fluctuation. In the current theoretical research and demonstration projects, wind power output can be smoothed by configuring energy storage with a certain capacity and proportion to stabilize its volatility. Energy storage power station is of great significance to weaken the random characteristics of intermittent energy and improve the utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28
Inventor 李建祥袁弘刘海波张秉良
Owner STATE GRID CORP OF CHINA
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