Method and system for distributing PCS active power by energy storage AGC considering SOC sorting

Abstract

The invention discloses a method and a system for distributing PCS active power by energy storage AGC considering SOC sorting. The method comprises the following steps: acquiring an SOC value of a battery corresponding to each PCS; sorting the SOC values of the batteries, and setting the priority of each PCS according to the sorting of the SOC values; and sequentially issuing the AGC issuing power to each PCS according to the priority of each PCS in combination with the maximum chargeable / dischargeable power value of each PCS until the AGC issuing power is completely distributed. According to the method, the requirements of power charging and discharging, battery consistency and SOC balance can be considered, the consistency of the batteries and the balance of the SOC in the charging and discharging process are considered under the condition that power dispatching is met, the inconsistency of the batteries is reduced, and the most accurate control information is provided for a power dispatching department.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a method and system for distributing active power of a PCS (energy storage converter) by an energy storage AGC considering SOC sorting. Background technique [0002] The large-scale development of electrochemical energy storage puts forward higher and higher requirements for control equipment. As an important module for EMS to control the energy storage station system, AGC plays a key role in the reasonable distribution of active power and the stable operation of the whole station. Therefore, Its control algorithm has been paid more and more attention. At present, national standards and industry standards do not specify the requirements for energy storage AGC to allocate active power to PCS, and each equipment manufacturer proposes a power allocation algorithm suitable for its own product characteristics. Judging from the existing literature, the commonly used ...

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Problems solved by technology

The advantage of this method is that the charge and discharge power and SOC balance are comprehensively considered in the form of weighting, so that the power is restricted by the SOC value during the charge and discharge process, and the final performance is that the battery consistency is better; the disadvantage is that there is no relevant basis for the weighted value used. , the meaning of different weighted values ​​is not clear, and it may lead to loss of control when the weighted value is at the extreme value

However, the above two commonly used algorithms cannot take into account the requirements of power charging and discharging, battery consistency, and SOC balance.

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