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Non-disturbance multi-level compensating circuit for AC electricity utilization system power factor

A technology of power consumption system and power factor, applied in reactive power compensation, reactive power adjustment/elimination/compensation, sustainable manufacturing/processing, etc., can solve problems such as power grid harmonic pollution, achieve good versatility and high cost performance Effect

Active Publication Date: 2014-04-30
NANJING DING CHUN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the existing schemes are: firstly, a single capacitor can only achieve an ideal compensation effect for one point; secondly, the phase-shifting switching type will generate additional harmonic pollution to the power grid

Method used

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  • Non-disturbance multi-level compensating circuit for AC electricity utilization system power factor
  • Non-disturbance multi-level compensating circuit for AC electricity utilization system power factor
  • Non-disturbance multi-level compensating circuit for AC electricity utilization system power factor

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the drawings.

[0013] Such as figure 1 As shown, the non-disturbance multi-level compensation circuit for the power factor of the AC power system includes a stabilized power supply circuit, a phase voltage and current signal conditioning circuit, and a compensation control circuit.

[0014] The stabilized power supply circuit includes a stabilized power supply module U0, a power supply capacitor C0, a stabilized resistance R2, and a reference tube D1. The phase power supply terminal L of the stabilized power supply module U0 is connected to the grid phase voltage terminal L, and the stabilized power supply module U0 The neutral terminal N terminal is connected to the grid neutral terminal N terminal, the output power terminal +V of the stabilized power supply module U0 is connected to the positive terminal VCC terminal of the stabilized power supply, one end of the power capacitor C0, and one end of th...

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Abstract

The invention relates to a non-disturbance multi-level compensating circuit for an AC electricity utilization system power factor. The non-disturbance multi-level compensating circuit comprises a stabilized voltage supply circuit, a phase voltage and current signal conditioning circuit and a compensation control circuit and specifically comprises a voltage transformer VS1, a current transformer CS1, a voltage follower IC1, a current follower IC2, a processor IC3, a drive chip IC4, a stabilized voltage supply module U0, a large solid-state relay U1, a small solid-state relay U2, a middle solid-state relay U3, a lower solid-state relay U4, a large compensation capacitor C1, a small compensation capacitor C2, a reference tube D1, an upper stabilivolt D2, a lower stabilivolt D3, a load resistor R1 and the like. According to the non-disturbance multi-level compensating circuit for the AC electricity utilization system power factor, non-disturbance combination switching on a grid is performed on the two compensation capacitors based on the four zero passing type AC solid-state relays so as to achieve four-level compensation control on the power factor, the requirement for power factor compensation control of most of AC loads can be met, and the method is high in cost performance, good in universality, safe and reliable.

Description

Technical field [0001] The invention belongs to the field of industrial measurement and control, and relates to a circuit, in particular to a non-disturbance multi-level compensation circuit for the power factor of an AC power system. It is suitable for applications where AC inductive loads are automatically controlled by power factor compensation to improve power supply, Electricity efficiency. Background technique [0002] Alternating current loads are mostly inductive loads, and the current phase lags behind the voltage phase. The power factor of the power supply and power consumption system is an important indicator of the quality of power operation. At present, the commonly used solutions for improving the power factor are: first, when the power factor is low to a certain extent, each phase is connected in parallel with a compensation capacitor for compensating the power factor of the inductive load; the second is to adopt phase-shift control Compensation capacitors for swi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/30Y02P80/10
Inventor 陈德传卢玲范利良
Owner NANJING DING CHUN ELECTRIC
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