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Method for controlling power coordination of light storage micro-grid system

A coordinated control and micro-grid technology, applied in the field of energy storage and micro-grid, can solve problems such as output power fluctuations, and achieve the effect of improving control accuracy

Inactive Publication Date: 2016-04-20
XUCHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the maximum power point of a photovoltaic power generation system is significantly affected by external factors such as light and temperature, and the output power has certain fluctuations, so power balance control is required

Method used

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  • Method for controlling power coordination of light storage micro-grid system
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Embodiment Construction

[0013] In order to enable those engaged in photovoltaic power generation and microgrid technology related fields to better understand the solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] The structure of the optical storage microgrid system is as follows: figure 1 As shown, the system consists of photovoltaic cell array, DC / DC converter, battery energy storage device, inverter and AC-DC bus. The photovoltaic cell array is connected to the DC bus through the step-up DC / DC converter, the battery is connected to the DC bus through the step-up DC / DC converter, and the DC bus passes through the inverter to convert the DC to AC and connect to the AC bus. The DC bus and the AC bus can be connected to DC and AC loads respectively.

[0015] When the photovoltaic cell array works in the MPPT state, at its output power P PV Greater than the power P required by the microgri...

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Abstract

The invention discloses a method for controlling power coordination of a light storage micro-grid system. The light storage micro-grid system comprises a photovoltaic cell array, two DC / DC converters, a storage cell energy storage device, an inverter and alternating-current and direct-current buses. The photovoltaic cell array is connected into the direct-current bus by the boost DC / DC converter, storage cells are connected into the direct-current bus by the boost and buck DC / DC converter, direct currents are converted into alternating currents by the direct-current bus via the inverter, the alternating currents are connected onto the alternating-current bus, and the direct-current bus and the alternating-current bus can be respectively connected with direct-current load and alternating-current load. The method is characterized in that structure diagrams of the light storage micro-grid system are given, and particular power exchange principles and particular working modes of the system are analyzed. The method has the advantages that light storage micro-grid system coordination control structures and MPPT (maximum power point tracking) control principles on the basis of dynamic impedance matching are given, accordingly, smooth power switch of the light storage micro-grid system can be controlled by the aid of the method, and the control precision of the system can be improved.

Description

technical field [0001] The invention relates to the technical fields of micro-grid and energy storage, and in particular to a power coordination control method of an optical-storage micro-grid system. Background technique [0002] Microgrid technology is a new technology approach for the modular application of distributed generation of renewable energy, which can effectively improve the efficiency of distributed generation. Photovoltaic power generation system is the most typical renewable energy power generation system in microgrid, which needs to be controlled by MPPT to maximize the utilization of resources. However, the maximum power point of the photovoltaic power generation system is significantly affected by external factors such as light and temperature, and the output power has a certain volatility, which requires power balance control. As the switching mechanism between the island operation and grid connection of the microgrid, the energy storage device can effect...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCH02J3/32Y02E10/56Y02E70/30
Inventor 王红玲王武罗书克
Owner XUCHANG UNIV
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