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Hybrid energy storage power coordination control method in combined light storage power generation system

A combined power generation and hybrid energy storage technology, applied in the power field, to maintain voltage stability, improve dispatchability and grid friendliness, and reduce impact

Inactive Publication Date: 2016-03-02
CHONGQING UNIV +3
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  • Abstract
  • Description
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Problems solved by technology

However, most of the existing methods focus on the stability of DC or AC bus voltage, and study the optimal configuration and coordinated control of hybrid energy storage units.

Method used

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  • Hybrid energy storage power coordination control method in combined light storage power generation system
  • Hybrid energy storage power coordination control method in combined light storage power generation system
  • Hybrid energy storage power coordination control method in combined light storage power generation system

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with accompanying drawing and embodiment: figure 1 It is a schematic diagram of the principle of the solar-storage combined power generation system of the present invention. figure 2 It is a schematic diagram of the frequency coordinated control of the power of the combined optical storage system of the present invention, image 3 is a schematic diagram of the frequency distribution characteristics of the power of the combined optical storage system of the present invention, Figure 4 It is a schematic diagram of the self-adaptive droop control of the combined optical-storage system power of the present invention, Figure 5 is a schematic diagram of an equivalent circuit model of the energy storage unit of the present invention, Figure 6 is a schematic diagram of the power coordination control of the energy storage unit of the present invention, Figure 7 It is a schematic diagram of the output of...

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Abstract

The invention provides a hybrid energy storage power coordination control method in a combined light storage power generation system. The method comprises steps that, dual-layer control on the combined light storage power generation system is employed, and power distribution of a hybrid energy storage unit is realized through frequency coordination control; according to available capacity apportionment instruction power of the hybrid energy storage unit, management on expect frequency absorption or emission of each current transformer is carried out. Through the method, impact of high frequency photovoltaic fluctuation components on the electrical network is reduced, schedulability and electrical network friendliness of a distributed photovoltaic power generation system are improved, and a new method is provided for operation and control of the combined light storage power generation system.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a power coordination control method for hybrid energy storage in a photovoltaic-storage combined power generation system. Background technique [0002] my country has a vast territory, and power resources and power loads are distributed in reverse along the east-west corridors, and high voltage and long distances cannot be avoided for a long time. However, the research results show that the large-scale long-distance transmission of new energy has exposed many disadvantages, such as the stable operation of wind and light centralized power plants, and the limitations of transmission corridors. Distributed photovoltaic power generation system is an effective way of organizing renewable energy. With the continuous reduction of the cost of photovoltaic cells, distributed photovoltaic power generation system has received more and more attention and rapid development. The improvement has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32H02J7/34H02J7/35
CPCH02J3/32H02J3/383H02J7/345H02J7/35Y02E10/56Y02E70/30
Inventor 曾正马建伟孙芊郭宝甫冯光王倩
Owner CHONGQING UNIV
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