APF current prediction control method for self-adaptive regulation of direct-current-side voltage based on internet

A DC-side voltage self-adaptive adjustment technology, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems such as inability to dynamically adjust the DC-side voltage and APF compensation performance degradation

Inactive Publication Date: 2017-09-05
HUNAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] To sum up, the problem in the existing technology is that the traditional control method of AP cannot dynamically adjust

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  • APF current prediction control method for self-adaptive regulation of direct-current-side voltage based on internet
  • APF current prediction control method for self-adaptive regulation of direct-current-side voltage based on internet
  • APF current prediction control method for self-adaptive regulation of direct-current-side voltage based on internet

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[0080] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0081] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0082] Such as figure 1 As shown, the predictive control method for adaptively adjusting the APF current based on the DC side voltage of the Internet provided by the embodiment of the present invention includes the following steps:

[0083] S101: Suppose the switching state functions of the three-phase APF arm are Sa, Sb, and Sc, respectively. The upper switching device of the three-phase bridge arm is turned on as 1, and the lower switching device is turned on as 0. The two-level APF ...

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Abstract

The invention belongs to the technical field of current prediction and discloses an APF current prediction control method for self-adaptive regulation of direct-current-side voltage based on internet. A dynamically compensated current signal is connected with a server through a signal line, and the server transmits the signal to a power grid monitoring terminal through the internet to achieve real-time monitoring. Timely sending of predicting results to the terminal is achieved through the internet, convenience is brought to a worker for timely knowing, and the operating safety and stability of equipment are improved. The method is achieved based on prediction control, does not need a complicated modulation link of a PWM method, and a structure is simple. Self-adaptive regulation of APF direct-current-side voltage is achieved, the direct-current-side voltage can be adjusted according to compensating current and power grid voltage in real time, smaller current ripples and power loss are kept while APF output performance is ensured, and the APF compensating performance.

Description

technical field [0001] The invention belongs to the technical field of current prediction, and in particular relates to an Internet-based DC side voltage self-adaptive adjustment APF current prediction control method. Background technique [0002] Harmonic or reactive currents generated by nonlinear loads will degrade the power quality of the power grid, affect social production and life, and cause economic losses. In the case of complex and time-varying harmonic or reactive current components, the traditional LC passive filter is increasingly unable to meet the power quality requirements of the power system. The active power filter (Active Power Filter, APF) effectively overcomes the shortcomings of the traditional method and has become an important way to compensate harmonic or reactive current. It injects a compensation current opposite to the direction of the current to be compensated into the grid, so that the power supply only outputs The fundamental wave current or t...

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Application Information

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IPC IPC(8): H02J3/01H02J3/18
CPCH02J3/01H02J3/18H02J3/1842H02J2203/20Y02E40/20
Inventor 王炜曾红兵陈刚
Owner HUNAN UNIV OF TECH
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