Optical-storage grid-connected interface system control method

A technology of interface system and control method, which is applied in the control field of optical storage grid-connected interface system, can solve problems such as insufficient simulation of synchronous generator operating characteristics, and achieve the effect of ensuring stability

Active Publication Date: 2021-02-19
STATE GRID QINGHAI ELECTRIC POWER +2
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Problems solved by technology

However, some methods based on droop control are only suitable approximations to the external characteristics of synchronous generators, which are not enough to simulate the real operating characteristics of synchronous generators

Method used

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  • Optical-storage grid-connected interface system control method
  • Optical-storage grid-connected interface system control method
  • Optical-storage grid-connected interface system control method

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Embodiment Construction

[0029] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples. Those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms are also within the scope of the claims listed in this application.

[0030] The present invention provides a control strategy for an optical storage grid-connected interface system. An actual optical storage system topology is as follows figure 1 As shown, the present invention mainly studies the control method of the grid-connected interface of the solar storage at the subsequent stage, that is, the inverter grid-connected part. The topology of the optical-storage grid-connected interface system: the three-phase PWM inverter is connected to the dyn11 transformer through an inductor, a filter capacitor, and connected to...

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Abstract

The invention provides a control method for an optical storage grid-connected interface system. In the control method of the optical-storage grid-connected interface system, droop control and synchronous generator mechanical model control are used for active power-frequency control, and droop control and synchronous generator electromagnetic characteristic control are used for reactive power-voltage control, so that the optical-storage grid-connected interface system has Similar to the external characteristics of synchronous generators, it has the ability to suppress grid faults and reduce the impact on the grid.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a method for controlling an optical-storage grid-connected interface system. Background technique [0002] With the global environmental problems and energy crisis becoming more and more serious, renewable clean energy such as solar energy and wind energy has received more and more attention. While vigorously developing distributed energy, the problems of distributed energy when connected to the grid have also attracted the attention of experts and scholars. Generally speaking, the current solar-storage grid-connected system is mainly connected to the grid through the inverter. Compared with the traditional synchronous generator, the grid-connected inverter has a fast response speed, lacks the moment of inertia and damping effect, and is not convenient for grid adjustment. Furthermore, the control methods of grid-connected inverters are different, and coupled...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 李正曦贾枬张节潭李春来陶以彬杨立滨李官军宋锐杨波杨军周晨赵世昌华光辉孟可风汪春王轩余豪杰杨嘉胡安平王学斌冯鑫振刘欢曹远志崔红芬庄俊鄢盛驰
Owner STATE GRID QINGHAI ELECTRIC POWER
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