CN202522613U - Single-phase electrical network voltage fundamental wave detection device - Google Patents
Single-phase electrical network voltage fundamental wave detection device Download PDFInfo
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- CN202522613U CN202522613U CN2012201182304U CN201220118230U CN202522613U CN 202522613 U CN202522613 U CN 202522613U CN 2012201182304 U CN2012201182304 U CN 2012201182304U CN 201220118230 U CN201220118230 U CN 201220118230U CN 202522613 U CN202522613 U CN 202522613U
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- proportional gain
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The utility model provides a single-phase electrical network voltage fundamental wave detection device. The device comprises a grid connected system main circuit, a voltage sampling circuit, a fundamental wave detection calculating circuit, a system control circuit and an electrical network. The voltage sampling circuit is disposed between the grid connected system main circuit and the electrical network which are connected together. An output terminal of the voltage sampling circuit is connected to the fundamental wave detection calculating circuit. The fundamental wave detection calculating circuit is connected to the grid connected system main circuit through the control system. The device is characterized in that the fundamental wave detection calculating circuit includes two proportion operational circuits, and a band pass filter structure composed of multiple-input-multiple-output variable systems is realized through a plurality of proportion gain modules and integration operational modules. The device of the utility model is capable of handling fundamental wave detection under cases of voltage distortion of the electrical network, voltage fall and other electric power quality problems, and is fast in response and high in output waveform quality.
Description
Technical field
The utility model relates to the power electronics control or the control detection device that is incorporated into the power networks, specifically a kind of single-phase electrical network voltage fundamental pick-up unit.
Background technology
As far as grid-connected system, carry out the mains voltage signal detection according to occasion of using and technical requirement different needs.But; Owing to receive the influence of nonlinear load in the electrical network, the network system that part electrical network, especially capacity of short circuit are less; The more or less freely power quality problem that occurs of its supply voltage makes that can't detect or the unfavorable problem of testing result appears in traditional detection method.On the other hand; In order to realize in the grid-connected system fundamental signal being followed the tracks of, to lock application such as phase, monitoring; The first-harmonic detection method must be able to be tackled line voltage and power quality problems such as variation occur distorting, falls, and it is fast to have response speed, the characteristics that the output waveform quality is high.
Therefore,, design a kind of single-phase electrical network voltage fundamental pick-up unit, help the design and the control of single-phase grid-connected system in order to address this problem.
Summary of the invention
The utility model technical matters to be solved is: provide a kind of high precision and response speed fast single-phase electrical network voltage fundamental pick-up unit.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of single-phase electrical network voltage fundamental pick-up unit; Comprise grid-connected system main circuit, voltage sampling circuit, first-harmonic detection computations circuit, system, control circuit and electrical network; In the middle of being connected with electrical network, said grid-connected system main circuit is provided with voltage sampling circuit; Output terminal connects to first-harmonic detection computations circuit in the voltage sampling circuit; First-harmonic detection computations circuit connects to the grid-connected system main circuit through control circuit; It is characterized in that: said first-harmonic detection computations circuit comprises two scale operation circuit; The first scale operation circuit is successively by the proportional gain module a that realizes proportional gain through two resistance and amplifier, proportional gain module b, proportional gain module c, proportional gain module d, realize that through resistance and electric capacity integral operation module a, the proportional gain module e of integral operation are in series successively; The second scale operation circuit is in series by proportional gain module f, proportional gain module g, proportional gain module h, integral operation module b, proportional gain module i successively successively; The input termination voltage sampling circuit of the first scale operation circuit, the output termination of the first scale operation circuit are to control circuit, and the second scale operation circuit is parallel to the first scale operation circuit through the electric capacity of several different resistances.
Said proportional gain module resistance in series, parallel resistance and an amplifier constitute reverse proportional component, and said integral operation module is for constituting integrator through a resistance in series, shunt capacitance and amplifier.
Said proportional gain module b is inner to be connected to output terminal and the proportional gain module g of proportional gain module e inner through a resistance a; Be provided with a resistance d between resistance a and the proportional gain module g; Said proportional gain module d inside connects input end and output terminal to the second scale operation circuit simultaneously through a resistance b, is provided with a resistance c between the resistance b and the second scale operation circuit input end.
Said proportional gain module b and proportional gain module d inside refer to such an extent that be between resistance in series and the operational amplifier.
After adopting above technical scheme: from the bandpass filter structures that realizes that through several proportional gain modules and integral operation module a multiple-input and multiple-output variable system constitutes; The first-harmonic that can tackle under the power quality problem conditions such as distorting, falling appears in line voltage detects; Response speed is fast, and the output waveform quality is high.
Description of drawings
Fig. 1 connects synoptic diagram for the grid-connected system that uses the utility model;
Fig. 2 is the utility model circuit diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model technology contents is explained:
Referring to Fig. 1; A kind of single-phase electrical network voltage fundamental pick-up unit; Comprise grid-connected system main circuit, voltage sampling circuit, first-harmonic detection computations circuit, system, control circuit and electrical network; In the middle of being connected with electrical network, the grid-connected system main circuit is provided with voltage sampling circuit; Output terminal connects to first-harmonic detection computations circuit in the voltage sampling circuit; First-harmonic detection computations circuit connects to the grid-connected system main circuit through control circuit; The voltage signal of from this voltage sampling circuit, exporting obtains the fundamental signal of line voltage through first-harmonic detection computations circuit; This fundamental signal is sent to and carries out in the system, control circuit such as effects such as lock phase, detections; First-harmonic detection computations circuit comprises two scale operation circuit, and the first scale operation circuit is successively by the proportional gain module a1 that realizes proportional gain through two resistance and amplifier, proportional gain module b2, proportional gain module c3, proportional gain module d4, realize that through resistance and electric capacity integral operation module a5, the proportional gain module e6 of integral operation are in series successively, and the second scale operation circuit is in series by proportional gain module f7, proportional gain module g8, proportional gain module h9, integral operation module b10, proportional gain module i11 successively successively; The input termination voltage sampling circuit of the first scale operation circuit; The output termination of the first scale operation circuit is to control circuit, and the second scale operation circuit is parallel to the first scale operation circuit through the electric capacity of several different resistances, i.e. proportional gain module b2 is inner to be connected to output terminal and the proportional gain module g8 of proportional gain module e6 inner through a resistance aR10; Be provided with a resistance dR16 between resistance aR10 and the proportional gain module g8; Proportional gain module d4 inside connects input end and output terminal to the second scale operation circuit simultaneously through a resistance bR21, is provided with a resistance cR12 between the resistance bR21 and the second scale operation circuit input end, and proportional gain module b and proportional gain module d inside refer to such an extent that be between resistance in series and the operational amplifier.
For proportional gain module and integral operation module; Proportional gain module a1, proportional gain module b2, proportional gain module c3, proportional gain module d4, proportional gain module e6, proportional gain module f7, proportional gain module g8, proportional gain module h9 and proportional gain module i11 are that resistance in series, parallel resistance and an amplifier constitute reverse proportional component, and integral operation module a5 and integral operation module b10 constitute integrator through a resistance in series, shunt capacitance and amplifier.
Because the proportional gain module realizes proportional gain through two resistance; Then the resistance of these two resistance possibility is identical also maybe be different; Mainly be to choose components and parts according to different situations; Resistance and electric capacity in the module of gained integral operation in like manner also are to choose by real needs, in order to further specify the structure of the utility model, following giving an example:
Embodiment 1
Referring to Fig. 2; A kind of single-phase electrical network voltage fundamental pick-up unit; Comprise grid-connected system main circuit, voltage sampling circuit, first-harmonic detection computations circuit, system, control circuit and electrical network; In the middle of being connected with electrical network, the grid-connected system main circuit is provided with voltage sampling circuit; Output terminal connects to first-harmonic detection computations circuit in the voltage sampling circuit; First-harmonic detection computations circuit connects to the grid-connected system main circuit through control circuit; The voltage signal of from this voltage sampling circuit, exporting obtains the fundamental signal of line voltage through first-harmonic detection computations circuit; This fundamental signal is sent to and carries out in the system, control circuit such as effects such as lock phase, detections; First-harmonic detection computations circuit comprises two scale operation circuit; The first scale operation circuit is that 24k Ω and parallel resistance resistance are that proportional gain module a1, the series resistance value of 16k Ω is that 10k Ω and parallel resistance resistance are that proportional gain module b2, the series resistance value of 10k Ω is that 200k Ω and parallel resistance resistance are that proportional gain module c3, the series resistance value of 10k Ω is that 10k Ω and parallel resistance resistance are that integral operation module a5 and the series resistance value of the proportional gain module d4 of 10k Ω, shunt capacitance that series resistance value is 30k Ω and 100nF is that 10k Ω and parallel resistance resistance are that the proportional gain module e6 of 10k Ω is in series successively by series resistance value; The second scale operation circuit is that 200k Ω and parallel resistance resistance are that proportional gain module f7, the series resistance value of 10k Ω is that 10k Ω and parallel resistance resistance are that proportional gain module g8, the series resistance value of 10k Ω is that 10k Ω and parallel resistance resistance are that integral operation module b10, the series resistance value of the proportional gain module h9 of 10k Ω, shunt capacitance that series resistance value is 30k Ω and 100nF is that 10k Ω and parallel resistance resistance are that the proportional gain module i11 of 10k Ω is in series successively by series resistance value successively; The input termination voltage sampling circuit of the first scale operation circuit; The output termination of the first scale operation circuit is to control circuit; The second scale operation circuit is parallel to the first scale operation circuit through the electric capacity of several different resistances; Be that proportional gain module b2 inside is that 10k Ω resistance a connects output terminal and the proportional gain module g inside to proportional gain module e7 through a resistance; The resistance d that to be provided with a resistance between resistance a and the proportional gain module g8 be 10k Ω; Proportional gain module d4 inside is that 10k Ω resistance b connects input end and output terminal to the second scale operation circuit simultaneously through a resistance, and being provided with a resistance between the resistance b and the second scale operation circuit input end is 10k Ω resistance c.
The principle of work of the utility model:
The utility model has adopted a bandpass filter structures that is made up of the multiple-input and multiple-output variable system, the fundamental signal of output line voltage after the line voltage that obtains through sample circuit is carried out filtering; Resistance and electric capacity among Fig. 2 are set according to the line voltage rated frequency of application scenario.
Claims (4)
1. single-phase electrical network voltage fundamental pick-up unit; Comprise grid-connected system main circuit, voltage sampling circuit, first-harmonic detection computations circuit, system, control circuit and electrical network; In the middle of being connected with electrical network, said grid-connected system main circuit is provided with voltage sampling circuit; Output terminal connects to first-harmonic detection computations circuit in the voltage sampling circuit; First-harmonic detection computations circuit connects to the grid-connected system main circuit through control circuit; It is characterized in that: said first-harmonic detection computations circuit comprises two scale operation circuit; The said first scale operation circuit is in series by the proportional gain module a (1) that realizes proportional gain through two resistance and amplifier, proportional gain module b (2), proportional gain module c (3), proportional gain module d (4), integral operation module a (5), proportional gain module e (6) through resistance and electric capacity and amplifier realization integral operation successively successively; The second scale operation circuit is in series by proportional gain module f (7), proportional gain module g (8), proportional gain module h (9), integral operation module b (10), proportional gain module i (11) successively successively; The input termination voltage sampling circuit of the first scale operation circuit; The output termination of the first scale operation circuit is to system, control circuit, and the second scale operation circuit is parallel to the first scale operation circuit through the electric capacity of several different resistances.
2. a kind of single-phase electrical network voltage fundamental pick-up unit according to claim 1; It is characterized in that: said proportional gain module a (1), proportional gain module b (2), proportional gain module c (3), proportional gain module d (4), proportional gain module e (6), proportional gain module f (7), proportional gain module g (8), proportional gain module h (9) and proportional gain module i (11) are that resistance in series, parallel resistance and an amplifier constitute reverse proportional component, and said integral operation module a (5) and integral operation module b (10) constitute integrator through a resistance in series, shunt capacitance and amplifier.
3. a kind of single-phase electrical network voltage fundamental pick-up unit according to claim 1 and 2; It is characterized in that: said proportional gain module b (2) is inner to connect output terminal and proportional gain module g (8) inside to proportional gain module e (6) through a resistance a (R10); Be provided with a resistance d (R16) between resistance a (R10) and the proportional gain module g (8); Said proportional gain module d (4) is inner to connect input end and output terminal to the second scale operation circuit simultaneously through a resistance b (R21), is provided with a resistance c (R12) between the resistance b (R21) and the second scale operation circuit input end.
4. a kind of single-phase electrical network voltage fundamental pick-up unit according to claim 3 is characterized in that: said proportional gain module b (2) and proportional gain module d (4) inside refer to such an extent that be between resistance in series and the operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201182304U CN202522613U (en) | 2012-03-26 | 2012-03-26 | Single-phase electrical network voltage fundamental wave detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201182304U CN202522613U (en) | 2012-03-26 | 2012-03-26 | Single-phase electrical network voltage fundamental wave detection device |
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| Publication Number | Publication Date |
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| CN202522613U true CN202522613U (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201182304U Expired - Fee Related CN202522613U (en) | 2012-03-26 | 2012-03-26 | Single-phase electrical network voltage fundamental wave detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615120A (en) * | 2013-11-05 | 2015-05-13 | 洛克威尔自动控制技术股份有限公司 | Industrial system phase sag detection |
-
2012
- 2012-03-26 CN CN2012201182304U patent/CN202522613U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615120A (en) * | 2013-11-05 | 2015-05-13 | 洛克威尔自动控制技术股份有限公司 | Industrial system phase sag detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20180326 |