CN203026942U - Current tracking equipment of electric network - Google Patents
Current tracking equipment of electric network Download PDFInfo
- Publication number
- CN203026942U CN203026942U CN 201220687669 CN201220687669U CN203026942U CN 203026942 U CN203026942 U CN 203026942U CN 201220687669 CN201220687669 CN 201220687669 CN 201220687669 U CN201220687669 U CN 201220687669U CN 203026942 U CN203026942 U CN 203026942U
- Authority
- CN
- China
- Prior art keywords
- active filter
- current
- transformer
- voltage transformer
- frequency circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The patent relates to an auxiliary device for monitoring and compensating an electric power network, and particularly relates to current tracking equipment of an electric network. The current tracking equipment of the electric network comprises a voltage transformer, a current transformer collecting end, an active filter high-frequency circuit, an active filter low-frequency circuit and a digital signal processor, wherein the voltage transformer is connected with the current transformer collecting end in parallel; the input ends collected by the voltage transformer and a current transformer are connected to the electric network; the output ends collected by the voltage transformer and the current transformer are connected with the digital signal processor; and the digital signal processor is connected with the active filter high-frequency circuit and the active filter low-frequency circuit respectively. By adopting the current tracking equipment of the electric network, accurate information can be obtained by filtering a harmonic wave; resonance loss is effectively reduced; the accuracy is improved; and support can be provided for compensating the harmonic wave with changed frequency and changing reactive power.
Description
Technical field
This patent relates to electric power network monitoring compensation servicing unit, is specially a kind of power network current tracking equipment.
Background technology
The high order harmonic component that frequency converter produces produces harmonic pollution by conduction, electromagnetic radiation and three kinds of modes of induction coupling to power supply and contiguous power consumption equipment.Conduction refers to that high order harmonic component is diverted to the load of power-supply system and parallel connection according to impedance separately, and the electric equipment generation of parallel connection is disturbed.Induction coupling refers in the process of conduction, can produce again electromagnetic coupled with the wire of frequency converter output line parallel lay-up and form inductive interference.Electromagnetic radiation refers to that the high order harmonic component of inverter output terminal also can produce radiation effects, and contiguous radio and electronic equipment are produced interference.Electric current and voltage harmonic will increase transformer copper loss and iron loss, and result rises transformer temperature, affects insulating capacity, causes Capacity Margin to reduce, and harmonic wave can also produce resonance and noise.Need accurate follow current information for administering harmonic wave.
Summary of the invention
This patent provides a kind of power network current tracking equipment for above technical problem, and purpose is to realize that the filtering harmonic wave obtains accurate information, effectively reduces resonance loss, improves precision, for the harmonic wave of frequency change and idle the compensating of variation provide support.
The concrete technical scheme of this patent is as follows:
The power network current tracking equipment, become by voltage transformer, current transformer collection terminal, active filter high-frequency circuit, active filter low-frequency channel, bank of digital signal processors, it is characterized in that: voltage transformer is in parallel with the current transformer collection terminal, the input access electrical network that voltage transformer and current transformer gather, the output linking number word signal processor that voltage transformer and current transformer gather, digital signal processor is connected with respectively source filter high-frequency circuit, active filter low-frequency channel.
Voltage transformer is in parallel with the current transformer collection terminal, obtains collection signal from electrical network, and digital signal processor carries out conversion processing with the power network current data, then returns to electrical network by active filter high-frequency circuit, active filter low-frequency channel.The utility model can realize that the filtering harmonic wave obtains accurate information, effectively reduces resonance loss, improves precision, for the harmonic wave of frequency change and idle the compensating of variation provide support.
Description of drawings
Fig. 1 is the structural representation of this patent.
Wherein, 1---voltage transformer, 2---current transformer collection terminal, 3---active filter high-frequency circuit, 4---active filter low-frequency channel, 5---digital signal processor.
Embodiment
Below in conjunction with embodiment, this patent is described further.
The power network current tracking equipment, become by voltage transformer, current transformer collection terminal, active filter high-frequency circuit, active filter low-frequency channel, bank of digital signal processors, voltage transformer is in parallel with the current transformer collection terminal, the input access electrical network that voltage transformer and current transformer gather, the output linking number word signal processor that voltage transformer and current transformer gather, digital signal processor is connected with respectively source filter high-frequency circuit, active filter low-frequency channel.Voltage transformer is in parallel with the current transformer collection terminal, obtains collection signal from electrical network, and digital signal processor carries out conversion processing with the power network current data, then returns to electrical network by active filter high-frequency circuit, active filter low-frequency channel.The utility model can realize that the filtering harmonic wave obtains accurate information, effectively reduces resonance loss, improves precision, for the harmonic wave of frequency change and idle the compensating of variation provide support.
Claims (1)
1. power network current tracking equipment, become by voltage transformer, current transformer collection terminal, active filter high-frequency circuit, active filter low-frequency channel, bank of digital signal processors, it is characterized in that: voltage transformer is in parallel with the current transformer collection terminal, the input access electrical network that voltage transformer and current transformer gather, the output linking number word signal processor that voltage transformer and current transformer gather, digital signal processor is connected with respectively source filter high-frequency circuit, active filter low-frequency channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220687669 CN203026942U (en) | 2012-12-13 | 2012-12-13 | Current tracking equipment of electric network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220687669 CN203026942U (en) | 2012-12-13 | 2012-12-13 | Current tracking equipment of electric network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026942U true CN203026942U (en) | 2013-06-26 |
Family
ID=48650894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220687669 Expired - Lifetime CN203026942U (en) | 2012-12-13 | 2012-12-13 | Current tracking equipment of electric network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203026942U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781470A (en) * | 2020-06-05 | 2020-10-16 | 国网浙江省电力有限公司电力科学研究院 | High-frequency circuit equivalent method of current transformer |
-
2012
- 2012-12-13 CN CN 201220687669 patent/CN203026942U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781470A (en) * | 2020-06-05 | 2020-10-16 | 国网浙江省电力有限公司电力科学研究院 | High-frequency circuit equivalent method of current transformer |
| CN111781470B (en) * | 2020-06-05 | 2023-05-16 | 国网浙江省电力有限公司电力科学研究院 | High-frequency circuit equivalent method of current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |