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Control strategy of distributed photovoltaic energy-storage micro grid

A distributed photovoltaic and control strategy technology, applied in photovoltaic power generation, electrical components, energy storage, etc., can solve problems such as imperfect control strategy research

Active Publication Date: 2016-06-15
深圳市欣旺达能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the control strategy for the smooth switching of the microgrid operation mode is not perfect, and some existing control strategies still have deficiencies.

Method used

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  • Control strategy of distributed photovoltaic energy-storage micro grid
  • Control strategy of distributed photovoltaic energy-storage micro grid
  • Control strategy of distributed photovoltaic energy-storage micro grid

Examples

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Embodiment

[0175] The following is attached Figure 1-4 The present invention is further described.

[0176] In this embodiment, the distributed photovoltaic energy storage micro-grid is built in a residential area, an industrial park, or a mixture of the two. The loads include: industrial electricity for factories and residential electricity for apartments; the specific load is electricity for apartment loads. Distributed photovoltaic energy storage microgrid system includes: photovoltaic power generation system, battery energy storage system, load, microgrid monitoring system, such as figure 1 shown.

[0177] The distributed photovoltaic energy storage microgrid control strategy realizes data exchange between configuration variables and configuration and control software through scheduling software, and the control software performs data exchange between configuration variables and configuration and front-end software.

[0178] The prediction algorithm module and the scheduling predi...

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Abstract

The invention relates to a controls strategy of a distributed photovoltaic energy-storage micro grid. The control strategy comprises that in the grid-connected state, the micro grid runs in a network manner, a battery energy-storage system works in a power constant control mode, when an active switching instruction is received, the power of the battery energy-storage system is adjusted, the micro grid is disengaged from the power grid and runs independently, and a micro-grid system executes an off-grid operation control strategy; meanwhile, the battery energy-storage system works in a voltage / frequency-constant control mode; and when a grid-connected instruction is received, the micro grid and the power grid run in the networked manner, the battery energy-storage system works in a PQ mode, and the micro-grid system executes a grid-connected operation control strategy. Self intermittence and fluctuation of distributed photovoltaic power generation can be alleviated, and the access capability and the grid-connected electric energy quality of distributed photovoltaic power generation are improved.

Description

Technical field: [0001] The invention relates to a photovoltaic energy storage microgrid, and further relates to a distributed photovoltaic energy storage microgrid control strategy. Background technique: [0002] Although distributed power generation systems have great advantages in energy saving, environmental protection, and power security, due to the difficulty in controlling distributed power sources and the high cost of single-machine access, large-scale distributed power generation access to the grid will affect the stability of the power system. , usually, the large power grid adopts a limited and isolated way to dispatch distributed power: when the power system fails, in order to reduce the impact on the large power grid, the distributed power must be out of operation immediately, which makes the advantages of distributed power impossible. be fully utilized. [0003] With the development of distributed power sources and micro-grids, the proportion of photovoltaic s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/28
CPCH02J3/383H02J3/28H02J3/388Y02E10/56Y02E40/10Y02E70/30
Inventor 孙威肖海伟李颖郭均柳姚自良何志超刘明爽王大臣李伟军王明旺
Owner 深圳市欣旺达能源科技有限公司
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