CN203800598U - Module dynamically adjusting AD acquisition electrical network voltage sampling rate - Google Patents
Module dynamically adjusting AD acquisition electrical network voltage sampling rate Download PDFInfo
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- CN203800598U CN203800598U CN201320860150.0U CN201320860150U CN203800598U CN 203800598 U CN203800598 U CN 203800598U CN 201320860150 U CN201320860150 U CN 201320860150U CN 203800598 U CN203800598 U CN 203800598U
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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
- Y02E40/30—Reactive power compensation
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Abstract
The utility model belongs to the electric power electronic automation control technical field, and specifically relates to a module dynamically adjusting an AD acquisition electrical network voltage sampling rate; the module comprises a power supply circuit, a voltage signal conversion unit, a voltage signal comparison unit, and a square wave period determine unit; a work principle is that an electrical network voltage signal is inputted to the voltage signal conversion unit; the voltage signal conversion unit converts the electric network voltage into a processing signal transmitted to the voltage signal comparison unit; the voltage signal comparison unit converts a sinusoidal signal into a square wave signal sent to the square wave period determine unit; the square wave period determine unit determines electric network voltage frequency and captures function calculating square wave period, thereby dynamically adjusting AD sampling rate. The module can accurately monitor the electric network voltage period in real time, and dynamically adjusts the AD sampling rate according to the electric network voltage period, thereby accurately calculating reactive power rate.
Description
Technical field
The utility model belongs to power electronics technical field of automatic control, is specifically related to the module that a kind of dynamic adjustment AD gathers line voltage sample rate.
Background technology
Electric load in electrical network, as motor, transformer etc., all belongs to inductive load, and these load in actual motion, all needs to ask for and lag behind idlely to power supply, realizes the conversion of energy, the acting of drive equipment.In order to compensate the consumption of this part hysteresis, commonplace method is Parallel-connected Capacitor compensation way.After the reactive-load compensation equipments such as shunt capacitor being installed in electrical network, the reactive power that can provide inductive load to consume, has reduced the idle burden of electric network source.Owing to having reduced reactive power flowing in electrical network, therefore can reduce the electric energy loss because carrying reactive power to cause of circuit and transformer, reactive power compensation that Here it is.High-pressure thyristor switched capacitor TSC device, refer to that rated operational voltage is the compensation arrangement of 6kV-35kV thyristor switchable capacitor, it is that a kind of thyristor that utilizes is as the dynamic reactive compensation device of noncontacting switch, it is a kind of typical Static Var Compensator, it,, to strengthening stability of power system, improving power system operation economy, guarantees quality of voltage and improves the quality of power supply and can bring into play good effect.Domestic high pressure TSC appliance arrangement mainly contains following shortcoming at present:
1, traditional harvester ubiquity sample rate is fixed, and cannot adapt to the problem of voltage ripple of power network;
2,, in the measurement of reactive power, the accurate reactive power that detects under the complex environments such as humorous wave interference cannot had.
The module of the utility model design has adopted dynamic adjustment AD to gather the method for line voltage sample rate, can well complete the collection of reactive power.
Summary of the invention
The utility model is applied to the collecting unit of 6kV-35kV type high pressure TSC controller, and it can play two effects: 1, conversion mains voltage signal; 2, judgement line voltage frequency.
In order to achieve the above object, the utility model is achieved in that the module that a kind of dynamic adjustment AD gathers line voltage sample rate comprises power circuit, voltage signal converting unit, voltage signal comparing unit, square-wave cycle judging unit, it is characterized in that: mains voltage signal is input to voltage signal converting unit, voltage signal converting unit is converted to processing signals by line voltage and is sent to voltage signal comparing unit, voltage signal comparing unit is converted to square-wave signal by sinusoidal signal and is sent to square-wave cycle judging unit, the frequency of square-wave cycle judging unit judgement line voltage, capturing function calculating side wave period, thereby realize the dynamic AD of adjustment sample rate, power circuit is voltage signal converting unit, voltage signal comparing unit, the power supply of square-wave cycle judging unit.
The utility model also has following technical characterictic:
1, the power module pressurizer that described power circuit adopts is AMS1117A type;
2, the operational amplifier model that described pressure signal comparing unit adopts is LM258 type, and it can compare voltage signal, output cycle square wave;
3, the main control chip model that described square-wave cycle judging unit adopts is the dsp processor of TMS320F2812 type.
The utility model can in real time, accurately be monitored the cycle of line voltage, and according to dynamic adjustment of line voltage cycle AD sample rate, thereby calculate accurately reactive power.
Accompanying drawing explanation
Fig. 1 is the utility model power circuit principle figure;
Fig. 2 is the utility model voltage signal conversion unit circuit figure;
Fig. 3 is the utility model voltage signal comparing unit circuit diagram;
Fig. 4 is the utility model square-wave cycle judging unit the electric circuit constitute schematic block diagram;
Fig. 5 is the utility model theory of constitution schematic block diagram.
Embodiment
With specific embodiment, the utility model is described in further detail with reference to the accompanying drawings below:
The module that a kind of dynamic adjustment AD gathers line voltage sample rate comprises power circuit, voltage signal converting unit, voltage signal comparing unit, square-wave cycle judging unit, when mains voltage signal is input to voltage signal converting unit, voltage signal converting unit is converted to processing signals by line voltage and is sent to voltage signal comparing unit, voltage signal comparing unit is converted to square-wave signal by sinusoidal signal and is sent to square-wave cycle judging unit, the frequency of square-wave cycle judging unit judgement line voltage, capturing function calculating side wave period, thereby realize the dynamic AD of adjustment sample rate, power circuit is voltage signal converting unit, voltage signal comparing unit, the power supply of square-wave cycle judging unit.The utility model can in real time, accurately be monitored the cycle of line voltage, and according to dynamic adjustment of line voltage cycle AD sample rate, thereby calculate accurately reactive power.
Specific embodiment:
The module that a kind of dynamic adjustment AD of the utility model gathers line voltage sample rate adopts DC+10V power supply, through rectification circuit, convert 3.3v to other device power supply, then the frequency that calculates line voltage by voltage signal converting unit, voltage signal comparing unit, square-wave cycle judging unit sends processor to, and detailed operation thes contents are as follows:
1, power subsystem:
Power subsystem function is to provide node work institute energy requirement, and circuit is to need 3.3 V power supplys, so the 10V voltage that must input utilizes power module pressurizer AMS1117A to carry out exporting after voltage-regulation, its circuit design as shown in Figure 1.
2, voltage signal converting unit:
Voltage signal converting unit is used two-stage voltage transformer, first first order voltage transformer is converted to 380v low pressure by 6kv ~ 35kv high pressure, then by second level voltage transformer, 380v low pressure is converted to 5v signal voltage to carry out follow-up signal processing, its circuit design as shown in Figure 2.
3, voltage signal comparing unit:
As shown in Figure 3, voltage signal comparing unit is converted to square-wave signal by 5v sinusoidal signal, and this unit adopts LM258 operational amplifier to compare voltage signal, output cycle square wave.
4, square-wave cycle judging unit:
As shown in Figure 4, it is the dsp processor of TMS320F2812 type that square-wave cycle judging unit processes to signal the main control chip model adopting, TMS320F2812 adopts 1.8V and 3.3V power supply, and the active crystal oscillator of external 30M, by the capturing function calculating side wave period of timer, thereby realize the dynamic AD of adjustment sample rate.
Claims (4)
1. dynamically adjust the module that AD gathers line voltage sample rate, comprise power circuit, voltage signal converting unit, voltage signal comparing unit, square-wave cycle judging unit, it is characterized in that: mains voltage signal is input to voltage signal converting unit, voltage signal converting unit is converted to processing signals by line voltage and is sent to voltage signal comparing unit, voltage signal comparing unit is converted to square-wave signal by sinusoidal signal and is sent to square-wave cycle judging unit, the frequency of square-wave cycle judging unit judgement line voltage, capturing function calculating side wave period, thereby realize the dynamic AD of adjustment sample rate, power circuit is voltage signal converting unit, voltage signal comparing unit, the power supply of square-wave cycle judging unit.
2. dynamic adjustment AD according to claim 1 gathers the module of line voltage sample rate, it is characterized in that: the power module pressurizer that described power circuit adopts is AMS1117A type.
3. dynamic adjustment AD according to claim 1 gathers the module of line voltage sample rate, it is characterized in that: the operational amplifier model that described voltage signal comparing unit adopts is LM258 type.
4. dynamic adjustment AD according to claim 1 gathers the module of line voltage sample rate, it is characterized in that: it is the dsp processor of TMS320F2812 type that described square-wave cycle judging unit adopts main control chip model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860150.0U CN203800598U (en) | 2013-12-25 | 2013-12-25 | Module dynamically adjusting AD acquisition electrical network voltage sampling rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860150.0U CN203800598U (en) | 2013-12-25 | 2013-12-25 | Module dynamically adjusting AD acquisition electrical network voltage sampling rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800598U true CN203800598U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320860150.0U Expired - Fee Related CN203800598U (en) | 2013-12-25 | 2013-12-25 | Module dynamically adjusting AD acquisition electrical network voltage sampling rate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958510A (en) * | 2016-06-18 | 2016-09-21 | 南京采薇且歌信息科技有限公司 | SOC chip for power grid monitoring and control equipment |
| CN107544334A (en) * | 2017-09-18 | 2018-01-05 | 吉林大学 | The data collecting card of adjust automatically sample rate |
| CN107727929A (en) * | 2017-10-18 | 2018-02-23 | 重庆博昂科技有限公司 | The generating set frequency fluctuation rate detection means and method of reciprocating internal combustion engine driving |
-
2013
- 2013-12-25 CN CN201320860150.0U patent/CN203800598U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958510A (en) * | 2016-06-18 | 2016-09-21 | 南京采薇且歌信息科技有限公司 | SOC chip for power grid monitoring and control equipment |
| CN107544334A (en) * | 2017-09-18 | 2018-01-05 | 吉林大学 | The data collecting card of adjust automatically sample rate |
| CN107727929A (en) * | 2017-10-18 | 2018-02-23 | 重庆博昂科技有限公司 | The generating set frequency fluctuation rate detection means and method of reciprocating internal combustion engine driving |
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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 |
Granted publication date: 20140827 Termination date: 20191225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |