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Y-type chain type network passive filter

A passive filter, chain network technology, applied in the AC network to reduce harmonics/ripples, harmonic reduction devices, etc., can solve the problem of large energy consumption caused by harmonic pollution, poor filter structure stability, filtering Circuit cost increase and other issues, to achieve the effect of outstanding energy saving and environmental protection, good filtering compensation effect, and reducing economic losses.

Pending Publication Date: 2019-05-10
江苏嘉诚中贝能源科技有限公司
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Problems solved by technology

[0002] At present, due to the increasingly common application of power electronic equipment, the harmonic values ​​generated by industrial and civil loads are large, and the spectrum distribution is also very wide. Harmonics and higher harmonics up to the 47th will lead to an increase in the cost of the filter circuit, and at the same time, harmonic pollution will also generate greater energy consumption; in addition, the existing filter circuit needs to use multiple sets of filters to filter the higher harmonics The filter circuit performs filtering at the same time, resulting in poor stability of the filter structure, and also increases the energy consumption of the filter itself

Method used

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  • Y-type chain type network passive filter

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Embodiment 1

[0022] This example provides figure 2 The impedance frequency characteristics of the filter composed of two parallel harmonic branches of 5th and 7th order shown are compared with a Y-type chain filter with the same characteristic order of 5th and 7th. The parameter values ​​of each component in the filter are specifically: C1=C2=C11=C12=628.7603 microfarads, L1=0.6446 howhen, L2=0.3288661 howhen, L11=0.6394 howhen, L12=0.329011 howhen, R11=17.9954 ohms, R12=12.19525 ohms, R13=3.7436 ohms; the frequency characteristics of the impedance of the two filters are as follows image 3 and Figure 4 As shown in the figure, curve 2 represents the frequency characteristics of the Y-type filter, and curve 1 represents the frequency characteristics of the filter formed by parallel connection of two monotone harmonic branches. As can be seen from the figure, the Y-type chain of the present invention The filter not only has a small impedance at its characteristic frequency (5 times 250HZ...

Embodiment 2

[0025] This embodiment takes a transformer with a capacity of 630KVA and a transformation ratio of 10KV / 0.4KV as an example. Figure 9 The 3 secondary Y-type filters when n is 2 and the 3 Y-type filters when n is 3 are used to filter and compensate the harmonic current generated by the transformer. The capacitors, inductors and The parameters of the non-inductive resistor are specifically: the capacitance value of the first 2nd order Y-type filter is C1=C2=1571.9007 microfarads, the inductance value is L1=0.7438 Haohen, L2=0.4196 Haohen, R11=25.3500 Ohm, R12=18.1138 ohms, R13=5.3895 ohms; the capacitance values ​​of the second Y-type filter are C1=943.1404 microfarads and C2=2829.4213 microfarads, and the inductance values ​​are L1=1.2380 Haohen and L2=0.1492 Haohen , R11 = 50.1589 ohms, R12 = 11.5656 ohms, R13 = 7.6538 ohms; the capacitance values ​​of the third 2-order Y-type filter are C1 = 1886.2808 microfarads, C2 = 2829.4213 microfarads, and the inductance value is L1 = ...

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Abstract

The invention provides a Y-type chain type network passive filter, and relates to the technical field of power electronics. According to the filter, a non-inductive resistor group is added on the basis of an existing chain filter, and one of the non-inductive resistors is connected with a null line, so that the robustness of the filter structure is enhanced; and the filtering of higher harmonics can be realized by using relatively few filtering branches, so that while a harmonic current of a power system can be effectively absorbed, the energy loss of the filter and the energy consumption caused by harmonic pollution are reduced. The Y-type chain type network passive filter plays an important role in controlling the filtering pollution of the power system.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a Y-type chain network passive filter. Background technique [0002] At present, due to the increasingly common application of power electronic equipment, the harmonic values ​​generated by industrial and civil loads are large, and the spectrum distribution is also very wide. Harmonics and higher harmonics up to the 47th will lead to an increase in the cost of the filter circuit, and at the same time, harmonic pollution will also generate greater energy consumption; in addition, the existing filter circuit needs to use multiple sets of filters to filter the higher harmonics The filter circuit performs filtering at the same time, resulting in poor stability of the filter structure, and also increases the energy consumption of the filter itself. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a Y-type chain n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 肖惕
Owner 江苏嘉诚中贝能源科技有限公司
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