Voltage optimization control method of off-grid energy storage converter based on compound control

An energy storage converter and optimized 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: 2014-11-05
STATE GRID CORP OF CHINA +2
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  • Abstract
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  • Application Information

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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 cause

Method used

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  • Voltage optimization control method of off-grid energy storage converter based on compound control
  • Voltage optimization control method of off-grid energy storage converter based on compound control
  • Voltage optimization control method of off-grid energy storage converter based on compound 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] like 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.

[0042...

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Abstract

The invention provides a voltage optimization control method of an off-grid energy storage converter based on compound control. The optimization control method comprises the steps of summing outputs of repetitive control and PID (Proportion Integration Differentiation) control as a control signal of the energy storage converter, allowing the PID control to adjust a deviation of an effective value of voltage, obtaining PID control quantity, allowing the repetitive control to adjust a deviation of actual output voltage and analog sinusoidal voltage of the energy storage converter, and obtaining repetitive control quantity. The method solves the problem of poor power quality of a power supply system caused by non-linear load connection, and improves the power quality of the power supply system during off-grid operation of the energy storage converter.

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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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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