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Island microgrid system voltage stability control method

A stable control method and system voltage technology, applied in the field of microgrid, to achieve the effect of maintaining the stability of the DC bus voltage

Pending Publication Date: 2021-01-29
兴储世纪科技股份有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a voltage stabilization control method for an isolated island microgrid system, which solves the problem of voltage layered control, enables the power in the microgrid to be kept in balance, and then keeps the DC bus voltage stable Wait

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Embodiment Construction

[0021] All features disclosed in all embodiments in this specification (including any appended claims, abstract and drawings), or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be used as Combining and / or extending, replacing in any way.

[0022] like figure 1 , as shown in 2, an island microgrid system voltage stability control method, using the power of each unit of the microgrid to control each unit of the microgrid to work in different control strategies.

[0023] Further, according to the difference between the output power of the battery and the power consumed by the load, the direction and magnitude of the charging and discharging power of the battery are controlled.

[0024] Further, each unit of the microgrid includes any one or more of a photovoltaic power generation unit system, an energy storage unit system, and a load unit system.

[0025] Furthermore, under the control strategy of the photovoltai...

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Abstract

The invention discloses an island microgrid system voltage stability control method. The method comprises the steps: taking power as a judgment reference, and enabling a microgrid to work in differentcontrol strategies through the current input and output power of each distributed unit of a microgrid; and controlling a direction and a magnitude of the charging and discharging power of the storagebattery according to a power difference between the output power of a photovoltaic battery and a load so that the power in the microgrid can be kept balanced, and the voltage of a direct-current buscan be kept stable. According to the invention, a voltage hierarchical control problem of the microgrid system is solved, the power in the microgrid can be kept balanced, and the voltage of the direct-current bus can be kept stable.

Description

technical field [0001] The invention relates to the field of micro-grids, and more specifically, to a method for controlling voltage stability of an island micro-grid system. Background technique [0002] In order to achieve efficient coordinated control of different types of distributed energy and reduce the impact on the power system, the concept of microgrid was proposed by experts and scholars. Microgrid is an integrated form of distributed energy, distributed load and energy storage system. It uses power electronic converters to realize energy conversion and management. model. According to the type of common bus voltage, microgrids can be divided into AC microgrids and DC microgrids. Since the traditional power system is in the form of AC, the research on microgrids is more focused on AC microgrids. However, with the improvement of power quality and system efficiency requirements in recent years, the research on DC microgrids is also gradually heating up. In the DC m...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/381H02J3/32H02J2300/26Y02E10/56Y02E70/30
Inventor 庞先标杨荣刘曙光张悦
Owner 兴储世纪科技股份有限公司
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