Optimal configuration method suitable for energy storage power of electrical power system with wind electricity

Abstract

The invention discloses an optimal configuration method suitable for the energy storage power of an electrical power system with wind electricity. The method comprises the following steps of: S1, obtaining the sample data of the wind power and the load of the electrical power system with wind electricity; S2, obtaining a positive rotation spare capacity and a negative rotation spare capacity according to the sample data and an energy storage power configuration model, wherein the energy storage power configuration model takes that the energy storage power used by the electrical power system in a dispatching cycle is the minimum as an object function, takes that the sum of the rated total force output upper limit of thermal power generating units in the electrical power system and the energy storage power upper limit is greater than the actually generated net load value as a positive rotation spare chance constraint, and takes that the sum of the rated total force output lower limit of the thermal power generating units in the electrical power system and the energy storage power lower limit is less than the actually generated net load value as a negative rotation spare chance constraint; and S3, obtaining the optimal configuration for the energy storage power needed by the electrical power system with wind electricity for coping a net load prediction error according to the positive rotation spare capacity and the negative rotation spare capacity. Via the method disclosed by the invention, the minimum configuration for the energy storage power can be obtained, safe operation can be ensured, and cost can be saved.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and more specifically relates to an optimal configuration method for energy storage power of a power system containing wind power. Background technique [0002] The anti-peaking characteristics, unpredictability and strong random fluctuation of wind power have brought great troubles to the power balance of the power system. It is difficult to meet the requirements only by conventional units, and it is also difficult to formulate daily dispatch methods. The system needs to have a strong Positive / negative power quick adjustment capability. Energy storage device is one of the effective ways to solve the power balance of power system including wind power. In the Chinese invention patent specification CN102593853A, an energy storage system capacity optimization configuration method for improving the wind power acceptance capacity is disclosed. This method reasonably optimizes the energy...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide an optimal allocation method of energy storage power suitable for wind power and load forecast deviations (called net load forecast deviations) for power systems containing wind power, aiming to solve Including the problem of the minimum energy storage power and spinning reserve required for large-scale wind power systems to deal with wind power and load forecast errors, it aims to solve the problem that the selection of energy storage device capacity in the prior art is based on historical wind power data, which fails to consider Due to the stable statistical distribution characteristics of wind power and load forecast errors, it is difficult for the configured energy storage capacity to reflect scenarios other than historical data

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