CN208955659U - A kind of phased breaker fundamental signal extraction element - Google Patents
A kind of phased breaker fundamental signal extraction element Download PDFInfo
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- CN208955659U CN208955659U CN201821410305.XU CN201821410305U CN208955659U CN 208955659 U CN208955659 U CN 208955659U CN 201821410305 U CN201821410305 U CN 201821410305U CN 208955659 U CN208955659 U CN 208955659U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses a kind of phased breaker fundamental signal extraction elements, the voltage checking chip of detection network voltage is sequentially electrically connected in power network line, the filter and adaptive notch filter of trap signal, network voltage is converted to low-voltage signal by high-voltage signal by voltage detecting circuit in voltage checking chip, voltage checking chip send low-voltage signal to filter, filter circuit in filter in low-voltage signal harmonic wave and noise signal effectively filtered, and filtered low-voltage signal is further sent to adaptive notch filter, adaptive resistance-trap wave circuit in adaptive notch filter automatically tracks mains frequency and filter out to other, network voltage fundamental signal needed for final output extracts phased breaker.The apparatus structure is simple, and cost is relatively low, it is easy to accomplish；The device has stronger robustness for the mains voltage signal rich in odd harmonic and noise, and the network voltage fundamental signal accuracy of phased breaker fundamental detecting device output is higher.
Description
Technical field
The utility model belongs to breaker technical field more particularly to a kind of phased breaker fundamental signal extraction element.
Background technique
In China's Distribution network, Chang Jinhang capacitor group, transformer, route switching operation are carrying out electrification throwing
When cutting operation, it can cause to shove and overvoltage transient process, cause damages to power equipment, influence the safety fortune of electric system
Row.Breaking-closing operating is completed at the optimum phase angle of voltage and current by control breaker, phase controlled switch technique applies energy
Effectively weaken this transient process, realizes shock-free smooth transition, but it inhibits the effect of transient process to depend on breaker
In the accuracy of optimum phase angle divide-shut brake, wherein the accurately ART network of extraction and frequency of fundamental wave reference signal is real
The premise of existing phase controlled switch technique.
Currently, the filter based on finite impulse response is widely used to the base of network voltage and electric current in phased breaker
Wave signal extracts, and can not effectively filter out harmonic wave and noise, more sensitive to the variation of network voltage fundamental frequency, to phased disconnected
The stable operation of road device adversely affects.
Utility model content
The purpose of this utility model is to propose a kind of phased breaker fundamental signal for deficiency present in existing method
Extraction element.The apparatus structure is simple, and the harmonic wave for being rich in network voltage and noise have good inhibiting effect, simultaneously
Network voltage fundamental frequency can be automatically tracked, stable operation provides guarantee under bad working environments for phased breaker.
To achieve the goals above, technical solution adopted in the utility model is:
A kind of phased breaker fundamental signal extraction element is sequentially electrically connected with detection network voltage in power network line
The filter and adaptive notch filter of voltage checking chip, trap signal, network voltage pass through voltage inspection in voltage checking chip
Slowdown monitoring circuit is converted to low-voltage signal by high-voltage signal, and voltage checking chip send low-voltage signal to filter, the filter in filter
Wave circuit in low-voltage signal harmonic wave and noise signal effectively filtered, and by filtered low-voltage signal further send to
Adaptive notch filter, the adaptive resistance-trap wave circuit in adaptive notch filter automatically track mains frequency and filter to other
It removes, network voltage fundamental signal needed for final output extracts phased breaker.
Voltage detecting circuit is equipped in the voltage checking chip.
Filter circuit is equipped in the filter.
Adaptive resistance-trap wave circuit is equipped in the adaptive notch filter.
Compared with existing phased breaker fundamental detecting device, the invention has the advantages that:
(1) apparatus structure is simple, and cost is relatively low, it is easy to accomplish；
(2) device has stronger robustness for the mains voltage signal rich in odd harmonic and noise, can be using each
Kind complex working condition；
(3) network voltage fundamental frequency can be tracked, it is phased disconnected compared with existing apparatus under fundamental frequency situation of change
The network voltage fundamental signal accuracy of road device fundamental detecting device output is higher.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
Specific embodiment
The utility model is described further below with reference to embodiment.
A kind of phased breaker fundamental signal extraction element as shown in Figure 1, is sequentially electrically connected with inspection in power network line
The voltage checking chip of network voltage, the filter and adaptive notch filter of trap signal are surveyed, network voltage passes through voltage detecting
Chip voltage detection circuit is converted to low-voltage signal by high-voltage signal, and network voltage to be detected is pressed mutual inductance by voltage detecting circuit
Device no-load voltage ratio is converted to low voltage signal, and realizes the electrical isolation of power grid and the present apparatus.
Voltage checking chip send low-voltage signal to filter, and the filter circuit in filter is to the harmonic wave in low-voltage signal
And noise signal is effectively filtered, and filtered low-voltage signal is further sent to adaptive notch filter, filter circuit will
The low-voltage signal of voltage detecting circuit output is handled, and harmonic signal therein and noise signal are effectively filtered.
Adaptive resistance-trap wave circuit in adaptive notch filter automatically tracks mains frequency and filter out to other, most
Network voltage fundamental signal needed for phased breaker is extracted in output eventually.Adaptive resistance-trap wave circuit automatically tracks mains frequency, when
Network voltage fundamental frequency deviate power frequency when, adaptive resistance-trap wave circuit can effectively track and filter out network voltage fundamental frequency with
Outer signal, thus network voltage fundamental signal needed for obtaining phased breaker.
Voltage detecting circuit is equipped in the voltage checking chip.Voltage checking chip reaches microelectronics using Shenzhen's beauty
The voltage checking chip that Science and Technology Ltd. provides, model can be selected as needed, not described in detail herein, voltage
Detection circuit is also the custom circuit of this field, is also not set forth in detail herein.
Filter circuit is equipped in the filter.Filter is that the prior art is not set forth in detail herein, filter circuit
For the custom circuit of this field, it is not set forth in detail herein.
Adaptive resistance-trap wave circuit is equipped in the adaptive notch filter.Adaptive notch filter is that the prior art is not done herein
It elaborates, adaptive resistance-trap wave circuit is the custom circuit of this field, is also not set forth in detail herein.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, it is on the premise of not departing from the spirit and scope of the utility model, in the art common
Simply changing and replacing for technical staff be all within the protection scope of the utility model.
Claims (4)
1. a kind of phased breaker fundamental signal extraction element, it is characterised in that: be sequentially electrically connected with detection in power network line
The voltage checking chip of network voltage, the filter of trap signal and adaptive notch filter, network voltage pass through voltage detecting core
Voltage detecting circuit is converted to low-voltage signal by high-voltage signal in piece, and voltage checking chip send low-voltage signal to filter, filter
Filter circuit in wave device in low-voltage signal harmonic wave and noise signal effectively filtered, and by filtered low-voltage signal
It further send to adaptive notch filter, the adaptive resistance-trap wave circuit in adaptive notch filter automatically tracks mains frequency and to other
Filtered out, network voltage fundamental signal needed for final output extracts phased breaker.
2. a kind of phased breaker fundamental signal extraction element according to claim 1, it is characterised in that: the voltage
Voltage detecting circuit is equipped in detection chip.
3. a kind of phased breaker fundamental signal extraction element according to claim 1, it is characterised in that: the filtering
Filter circuit is equipped in device.
4. a kind of phased breaker fundamental signal extraction element according to claim 1, it is characterised in that: described is adaptive
It answers and is equipped with adaptive resistance-trap wave circuit in trapper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821410305.XU CN208955659U (en) | 2018-08-30 | 2018-08-30 | A kind of phased breaker fundamental signal extraction element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821410305.XU CN208955659U (en) | 2018-08-30 | 2018-08-30 | A kind of phased breaker fundamental signal extraction element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208955659U true CN208955659U (en) | 2019-06-07 |
Family
ID=66736291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821410305.XU Active CN208955659U (en) | 2018-08-30 | 2018-08-30 | A kind of phased breaker fundamental signal extraction element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208955659U (en) |
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2018
- 2018-08-30 CN CN201821410305.XU patent/CN208955659U/en active Active
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