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Multi-element energy storage integration method for increasing energy utilization efficiency of regional power grid

A technology of regional power grid and multiple energy storage, applied in energy reserve, AC network load balancing, reducing/preventing power oscillation, etc. Effect

Inactive Publication Date: 2017-08-15
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
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  • Application Information

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Problems solved by technology

Since the regional power grid contains intermittent and stochastically fluctuating renewable energy power generation affected by meteorological factors, there are power fluctuations when the regional power grid is connected to the grid or isolated.

Method used

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  • Multi-element energy storage integration method for increasing energy utilization efficiency of regional power grid

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Embodiment Construction

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] The invention provides a multivariate energy storage fusion method for improving the energy utilization rate of a regional power grid. The regional power grid system includes a multivariate energy storage system, a regional power grid energy storage The energy storage system includes multiple sets of energy storage units consisting of lithium batteries, lead-acid batteries, supercapacitors, and all-vanadium redox flow batteries. Each set of energy storage units is connected to the DC bus of the regional power grid through a DC / DC conversion unit. Taking a regional power grid demonstration base as an example, such as figure 1 As shown, it is equipped with a photovoltaic power generation system and a wind power gen...

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Abstract

The invention discloses a multi-element energy storage integration method for increasing energy utilization rate of a regional power grid. The multi-element energy storage integration method integrates a lithium battery, a lead-acid storage battery, a supercapacitor and an all-vanadium redox flow battery energy storage unit to be applied to a regional power grid system, takes regional power grid power prediction, energy storage battery electricity quantity and energy storage battery charge-discharge times as constraint conditions, provides the optimal strategy for a multi-element energy storage system of the regional power grid system, and controls charge-discharge operating states according to the optimal strategy, so as to increase the energy utilization rate of the regional power grid system. By accessing the multi-element energy storage unit to the regional power grid system, the power fluctuations of the regional power grid system can be effectively inhibited, the solar curtailment and wind curtailment phenomena in regions with abundant renewable energy resources in the case of power imbalance are avoided, and the energy utilization rate of the regional power grid system can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of regional power grid systems, and more specifically, relates to a multi-element energy storage fusion method for improving the energy utilization rate of regional power grids. Background technique [0002] With policy support and technological progress, renewable energy power generation, especially wind power generation technology and wind power generation technology, has developed rapidly, and regional power grids are an important form of renewable energy utilization. Since the regional power grid contains intermittent and stochastically fluctuating renewable energy power generation affected by meteorological factors, there are power fluctuations in the regional grid-connected or isolated grid operation. The stable operation of the regional power grid mainly depends on the energy balance control. Energy storage technology is an important means to achieve energy balance and ensure the stable operation of t...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/32
CPCH02J3/24H02J3/32Y02E70/30
Inventor 喻明江田春光刘波兰贞波王卓李文岚李爱魁周盛冯万兴
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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