A low wear and flexible interface control method for high-power sensitive impact loads
A flexible interface and impact technology, which is applied in the field of low wear and flexible interface control of high-power sensitive impact loads, can solve problems such as economic losses, large impacts on semiconductor factories and steel mills, and easy occurrence of industrial waste, so as to avoid impact effect
Active Publication Date: 2021-10-12
HUNAN UNIV
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Problems solved by technology
In industrial applications, voltage sags have a greater impact on semiconductor factories and steel mills, and industrial waste products are prone to occur, resulting in huge economic losses
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[0016] like figure 1 As shown, the DC side of the high-power sensitive impact load is modified, and a Boost converter, a bidirectional energy storage converter and a battery are added. In this way, there are three power supply branches that can supply power to high-power sensitive impact loads: when the grid is normal, supply power to high-power sensitive impact loads through three-phase uncontrollable rectification and load inverter; when the grid voltage sags, through three-phase Uncontrollable rectification, Boost converter and load converter supply power to high-power sensitive impact loads; when the grid voltage is interrupted for a short time, the battery, bidirectional energy storage Power sensitive shock load power supply. These three power supply branches can ensure continuous power supply to the load when the grid voltage sags and interrupts; when the load power changes drastically, the energy storage device can quickly compensate for the drastic change of the load ...
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The invention discloses a low-throughput and flexible interface control method for high-power sensitive impact loads. The DC side of the high-power sensitive impact loads is modified, and Boost converters, bidirectional energy storage converters and storage batteries are added. The voltage outer loop proportional integral control and the current inner loop proportional control are adopted for the boost converter to ensure that the output voltage of the boost converter accurately tracks the command value; the outer loop of the bidirectional energy storage converter is controlled by a flexible interface to sense the impact in real time When the power change of the load exceeds the set threshold value, the output of the flexible interface control is used as the current inner loop command, and the inductance current inner loop of the energy storage converter adopts proportional integral control to ensure the inductance of the energy storage converter The current accurately tracks the command value. The proposed low-throughput and flexible interface control method for high-power sensitive impact loads can not only protect high-power sensitive impact loads from voltage sags and short-term voltage interruptions, but also have a flexible interface function for the grid to avoid load The impact of drastic power changes on the power grid.
Description
technical field [0001] The invention relates to the field of electric energy quality control, in particular to a low wear and flexible interface control method for high-power sensitive impact loads. Background technique [0002] Electric energy is a secondary energy source that is economical, clean, practical, and easy to convert, transport, and control. As a special commodity, its quality needs to be jointly maintained by the generator, supplier, and user. Power quality directly affects the operating characteristics of electrical equipment, and even affects the safe operation of the power grid, so power quality is of great significance to the operation of social production and people's lives. In recent years, the structure of the modern power grid and the nature of the power load have shown unprecedented changes. Sensitive loads based on power electronic equipment, computers, and microprocessors have been put into use in large quantities. While the problem of power quality ...
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IPC IPC(8): H02J3/00H02J9/06
CPCH02J3/005H02J9/061
Inventor 罗安伍文华陈燕东谢志为徐元璨刘津铭周乐明周小平
Owner HUNAN UNIV