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Load unbalance compensation system including limiter controller and limiter compensation method

A limiter controller, a technology for load unbalance, applied in the direction of reducing the asymmetry of polyphase networks, eliminating/reducing asymmetry of polyphase networks, etc., can solve the problem that the limiter processing link cannot be applied to the load compensation system.

Active Publication Date: 2017-01-18
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the existing limiting processing link cannot be applied to the load compensation system based on no harmonic detection, the present invention provides a load unbalance compensation system and a limiting compensation method including a limiting controller

Method used

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  • Load unbalance compensation system including limiter controller and limiter compensation method
  • Load unbalance compensation system including limiter controller and limiter compensation method
  • Load unbalance compensation system including limiter controller and limiter compensation method

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Embodiment Construction

[0028]The load unbalance compensation system with limiter controller, its principle block diagram is as follows: figure 2 As shown, it includes a three-phase four-leg inverter bridge, the AC side of the three-phase four-leg inverter bridge is connected to the power grid via an inductor, and a capacitor is provided on the DC side, and also includes an AC current acquisition module for collecting grid current, an acquisition The AC voltage acquisition module for grid voltage, the inductance current acquisition module for acquiring the inductance current on the AC side of the three-phase four-arm inverter bridge, the DC voltage acquisition module for acquiring the capacitor voltage on the DC side of the three-phase four-arm inverter bridge, and the AC current acquisition module The output end of the clark transformation module is connected with the input end of the clark transformation module, the output end of the AC current acquisition module is also connected with the input en...

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Abstract

The invention relates to a load imbalance compensation system and method based on non-harmonic detection, in particular to the load imbalance compensation system comprising an amplitude-limiting controller and an amplitude-limiting compensation method, and dynamic amplitude-limiting compensation of power grid current can be realized without load current and harmonic detection. The amplitude-limiting compensation method is based on non-harmonic detection, proportional integral and proportional resonant principles and applied to a model of the high-power load imbalance compensation system in a rotary coordinate system, the model comprises the amplitude-limiting controller, a proportional integral controller and a proportional resonant controller, a purpose of limiting output current is achieved by adjusting a target current reference value in the rotary coordinate system, the dynamic compensation of the power grid current can be realized without load current and harmonic detection to the maximum extent, and the load imbalance compensation system with the limited capacity can be combined with a grid and guaranteed to safely run.

Description

technical field [0001] The invention relates to a load unbalance compensation system and method based on harmonic-free detection, which can realize dynamic limit compensation for power grid current without detecting load current and harmonics, specifically for a load imbalance with a limiter controller. Balance compensation system and clipping compensation method. Background technique [0002] With the continuous development of power electronics technology, a large number of unbalanced loads are used. Due to the power load of a certain phase or several phases in the local power grid is too heavy or too light, the power quality of the local power grid is reduced, and the voltage and current of the power grid are unbalanced. , Excessive harmonics, excessive neutral wire current, excessive grid loss and other power quality problems in the three-phase four-wire power grid will seriously shorten the life of power transformers and affect the normal operation of power equipment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/26
CPCY02E40/50
Inventor 韩肖清王磊杨宇孟润泉曹国栋刘翼肇陈宇豪
Owner TAIYUAN UNIV OF TECH
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