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An active harmonic resistor device and method without AC voltage sampling

A technology of AC voltage and resistance device, applied in harmonic reduction device, AC network to reduce harmonics/ripple, flicker reduction of AC network, etc., can solve problems such as high cost, increased equipment and control complexity, and a large number of other problems. , to achieve the effect of simple control, easy promotion and use, cost reduction and complexity reduction

Active Publication Date: 2018-10-30
XI AN JIAOTONG UNIV
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Problems solved by technology

At present, in the control of active harmonic resistance, it is necessary to sample the voltage and current of the AC side port of the power electronic converter, which requires a large number of voltage and current sampling components, which makes the cost higher and increases the complexity of equipment and control degree, which limits the popularization and use of active harmonic resistors

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  • An active harmonic resistor device and method without AC voltage sampling
  • An active harmonic resistor device and method without AC voltage sampling
  • An active harmonic resistor device and method without AC voltage sampling

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the drawings and specific embodiments, and the present invention is not limited to the following embodiments.

[0044] An active harmonic resistance device without AC voltage sampling of the present invention is composed of a power electronic converter 1, a DC capacitor 2, an AC side filter inductor 3, an AC current sampling circuit 4, a DC side voltage sampling circuit 5 and a control circuit 6. . The DC side of the converter 1 is connected with a DC capacitor 2 and a DC side voltage sampling circuit 5, and the AC side of the converter 1 is connected with an AC filter inductor 3 and an AC current sampling circuit 4. The output terminal of the DC side voltage sampling circuit 5 and the output terminal of the AC current sampling circuit 4 are connected to the control circuit 6, and the control circuit 6 calculates and obtains a control instruction to control the operation of the converter 1. There is...

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Abstract

The invention discloses an active harmonic resistance device and method without AC voltage sampling. The active harmonic resistance device comprises a converter and a control circuit, wherein a DC side of the converter is connected with a DC capacitor and a DC-side voltage sampling circuit, an AC side of the converter is connected with an AC filtering inductor and an AC current sampling circuit, the output end of the DC-side voltage sampling circuit and the output end of the AC current sampling circuit are connected with the control circuit, the control circuit comprises a fundamental current phase controller and a current controller, calculates to obtain a control instruction and controls DC capacitor voltage of the converter to achieve a harmonic resistance function. By the device, the cost and the complexity of the active harmonic resistance device can be effectively reduced, and the promotion and the application of the active harmonic resistance device are facilitated.

Description

Technical field [0001] The invention relates to an active harmonic resistance device and method without AC voltage sampling, and belongs to the technical field of active harmonic resistance control. It is suitable for the damping of resonance in the power system. Background technique [0002] At present, the problem of harmonic pollution in the power system is becoming more and more serious. A large number of harmonics can easily cause resonance in the power system and lead to system failure. The suppression of resonance in the power system is currently mainly achieved by adding passive resistors. However, the use of passive resistors inevitably produces functional loss and heat generation problems. [0003] In recent years, with the development of power electronics technology, the concept of active harmonic resistance has been proposed. Active harmonic resistance is to control the power electronic converter to simulate the characteristics of resistance at a certain harmonic fre...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/002H02J3/01Y02E40/40
Inventor 雷万钧聂程王跃陈明锋王华佳
Owner XI AN JIAOTONG UNIV
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