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Active electric power reactive compensation filter

A compensation filter and filter technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, electrical components, etc., can solve problems such as harmonic pollution and large quantity, reduce operating loss, and optimize three-phase Significant effect of unbalance degree and energy-saving benefit

Inactive Publication Date: 2016-09-21
GUYUAN POWER SUPPLY COMPANY STATE GRID NINGXIA ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These devices will generate a large amount of zero-sequence harmonic current in the power grid. Although the harmonic current of a single electrical appliance is small, the harmonic pollution caused by the large number is extremely serious.

Method used

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  • Active electric power reactive compensation filter
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Embodiment Construction

[0033] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments thereof.

[0034] like figure 1 As shown, an active power reactive power compensation filter is composed of three parts: a harmonic detection system 1, a control system, and an inverter main circuit 2. Connect the harmonic detection system 1, the control system and the inverter main circuit 2; the harmonic detection system 1 detects the harmonics in the system and provides a reference value that needs to compensate the harmonics, and the control system according to the reference value value to generate corresponding pulses to control the inverter main circuit 2 to generate compensation current or voltage to track the reference value to achieve a compensation effect.

[0035] The harmonic detection system 1 can accurately calculate current, voltage, harmonics, active and reactive power before compensation and after comp...

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Abstract

The invention discloses an active electric power reactive compensation filter. The filter comprises a harmonic wave detection system, a control system and a main inverter circuit. The filter is connected in parallel with a non-linear load of a power grid line and is sequentially connected with the harmonic wave detection system, the control system and the main inverter circuit, the harmonic wave detection system detects system harmonic waves and provides a reference value for harmonic wave compensation, and corresponding pulses are generated through the control system according to the reference value to control the main inverter circuit for generating a compensation current or voltage to track the reference value to realize the compensation effect. The filter is advantaged in that dynamic active filtering, rapid harmonic wave interference supplement and reactive compensation are realized, rapid tracking compensation for harmonic waves with different frequencies is carried out, real-time line power factor detection and dynamic compensation are carried out to completely solve a problem of three-phase unbalance, energy saving benefits are substantial, and power grid operation loss is reduced.

Description

Technical field: [0001] The invention relates to the technical field of power electronics, in particular to a three-phase four-wire parallel active power reactive power compensation filter. Background technique: [0002] The development of power electronics technology has made the application of various nonlinear and time-varying electronic devices more and more widely. First, it facilitates the application of electric energy. Second, the generated harmonics and reactive power have caused serious pollution to the power grid. Users have done a lot of harm. As a new type of harmonic and reactive power comprehensive compensation system, active power filter has received more and more attention. [0003] In the low-voltage power distribution system, the three-phase four-wire system is widely used as the most important power supply mode in industrial sites and civil buildings. With the modernization of cities, the proportion of commercial and civilian electricity in urban electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/18H02J3/26
CPCH02J3/01H02J3/1842H02J3/1864H02J3/26Y02E40/30Y02E40/40Y02E40/50
Inventor 牛育忠王国功杨哲刘昌平刘存德别亚锋赵荣幸
Owner GUYUAN POWER SUPPLY COMPANY STATE GRID NINGXIA ELECTRIC POWER
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