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Grid energy storage system capacity design method

A technology of energy storage system and design method, applied in computing, instrumentation, data processing applications, etc.

Active Publication Date: 2016-01-13
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology

[0004] The invention proposes an optimization method for the capacity of the energy storage system required to cooperate with the generator to complete the AGC task. Aiming at the problem that the energy storage system is used for secondary frequency regulation of the power system, a filter is used to transfer the AGC power command between the generator and the energy storage system. to allocate between

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[0050] 1. The method for optimizing the capacity of the energy storage system required to cooperate with the generator to complete the AGC task proposed by the present invention comprises the following steps:

[0051] (1) Assignment of FM tasks

[0052] The traditional generator has a relatively slow climbing speed and is suitable for executing relatively slow-changing power commands, while the output power of the energy storage system can change rapidly, so it can respond to relatively fast-changing power commands in a timely manner. Therefore, a filter can be used to filter the original power command, the generator executes the power command of the low frequency part, and the energy storage system executes the power command of the high frequency part.

[0053] After the AGC power command passes through the filter, the low-frequency component and high-frequency component are separated and distributed to the generator and energy storage system respectively. The original AGC p...

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Abstract

The present invention relates to a design method of a grid energy storage system capacity in operation. For the problem of an energy storage system for power system secondary frequency modulation, a filter is used to distribute an AGC power command between a generator and an energy storage system, and with the minimization of the average daily cost of performing a frequency modulation task by the generator and the energy storage system as a target, the optimization model of a frequency modulation capacity is established. Through optimizing a filter parameter, the optimal frequency modulation capacity with lowest total average daily cost is obtained, and an optimal scheme is provided for energy storage system capacity configuration. The frequency modulation task is adjusted according to the respective frequency modulation ability of the generator and the energy storage system in operation. According to the strategy of adjusting the frequency modulation task of the energy storage system according to an energy storage system residual energy, the energy storage system residual energy can be maintained in a reasonable interval. The energy storage system participates in an AGC, the response ability of the whole system to an AGC power command can be greatly improved, and the climbing power of the generator is reduced.

Description

technical field [0001] The invention relates to a method for optimizing the capacity of an energy storage system required to cooperate with a generator to complete an AGC task, and a power distribution and coordination method between the generator and the energy storage system during operation, and belongs to the technical field of power system optimization calculation. Background technique [0002] The imbalance of the active power of the power system will cause the frequency deviation of the system, and the excessive frequency deviation will pose a threat to the stability of the system. In order to control the frequency within the allowable variation range, it is necessary to control the frequency of the power system. The secondary frequency regulation of the power system restores the frequency of the system to the rated value through the frequency regulator, and at the same time restores the exchange power between regions. The secondary frequency regulation is also called...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24G06Q10/04G06Q50/06
Inventor 陆志刚雷博袁志昌黎小林许树楷
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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