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A voltage optimization control method for off-grid energy storage converter based on composite control

An energy storage converter and composite control technology, applied in the direction of AC network load balancing, etc., can solve problems such as poor power quality in power supply systems, and achieve the effects of solving voltage harmonics, enhancing stability, and good dynamic response capabilities

Active Publication Date: 2016-09-21
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] Therefore, it is necessary to provide a control method to solve the problem of poor power quality of the power supply system caused by nonlinear load access, and improve the power quality of the power supply system when the energy storage converter is running off-grid

Method used

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  • A voltage optimization control method for off-grid energy storage converter based on composite control
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  • A voltage optimization control method for off-grid energy storage converter based on composite control

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Embodiment Construction

[0039] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0040] Such as figure 1 as shown, figure 1 It is a schematic structural diagram of the distributed power microgrid system in this embodiment. The distributed power microgrid system in this embodiment includes a 380KV AC microgrid busbar, a wind power generation system, a photovoltaic power generation system, an energy storage system, user loads, a remote monitoring system and Coordinating controller.

[0041] The wind power generation system, photovoltaic power generation system, energy storage system, and user loads are respectively connected to the 380KV AC microgrid bus, the remote monitoring system and the coordination controller communicate with each other, and the coordination controller is connected to the wind power generation system, photovoltaic power generation system, energy storage system, and user loads. load.

[0...

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Abstract

The present invention provides an off-grid energy storage converter voltage optimization control method based on composite control, the optimization control method is to add the output of repetitive control and PID control as the control signal of the energy storage converter ; The PID control is to adjust the deviation of the effective value of the voltage to obtain the PID control amount; the repetitive control is to adjust the deviation between the actual value of the output voltage of the energy storage converter and the simulated sinusoidal voltage to obtain the repetitive control amount. The method solves the problem of poor power quality of the power supply system caused by nonlinear load access, and improves the power quality of the power supply system when the energy storage converter operates off-grid.

Description

technical field [0001] The invention relates to a method in the field of energy storage converter control, in particular to a compound control-based off-grid energy storage converter voltage optimization control method. Background technique [0002] Building a smart grid and improving the security, stability, reliability and power quality of the power system are the basic requirements for power grid construction. As an important means of improving the smart grid's consumption of renewable energy generation capacity, energy storage technology is the key to supporting the construction of the smart grid One of the techniques. Affected by seasons, weather and geographical conditions, wind power, solar power, small hydropower and other renewable energy power generation has obvious discontinuity and instability, and the generated power fluctuates greatly and is poor in adjustability. Equipped with high-efficiency energy storage devices, it can solve the contradiction of time diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32
Inventor 冯鑫振陶以彬李官军丁杰吴福保李强杨波赫卫国袁晓东胡金杭张晓琳桑丙玉周晨曹远志刘欢鄢盛驰余豪杰
Owner STATE GRID CORP OF CHINA
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