CN203225524U - A reactive compensation controller using voltage division sampling technology - Google Patents
A reactive compensation controller using voltage division sampling technology Download PDFInfo
- Publication number
- CN203225524U CN203225524U CN 201320127438 CN201320127438U CN203225524U CN 203225524 U CN203225524 U CN 203225524U CN 201320127438 CN201320127438 CN 201320127438 CN 201320127438 U CN201320127438 U CN 201320127438U CN 203225524 U CN203225524 U CN 203225524U
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- voltage
- processing unit
- cpu processing
- input
- 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 - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a reactive compensation controller using voltage division sampling technology. The reactive compensation controller comprises a current-limiting divider circuit, an operational amplifier 1, an operational amplifier 2, and a CPU processing unit. The current-limiting divider circuit divides the voltage of an inputted three-phase voltage signal and converts the three-phase voltage into low voltage in order to input the low voltage to the operational amplifier 1. The operational amplifier 1 performs differential operation on the three-phase voltage signal suffering from the low voltage processing and inputs the operated signal into the CPU processing unit. According to system reference voltage, the operational amplifier 2 provides voltage and inputs the voltage into the other input end of the operational amplifier 1. The CPU processing unit is connected with the output end of the operational amplifier 1. The operational amplifier 1 is an amplifier used for differential operation and the operational amplifier 2 is a voltage follower. The fluctuation range of the voltage is reduced by voltage division sampling processing so as to reduce CPU processing difficulty.
Description
[technical field]
The utility model belongs to the power transmission and distribution technical field of electric power, electronics, relates in particular to a kind of idle compensating control that adopts the dividing potential drop technology.
[background technology]
Handling voltage method in the prior art is to give the CPU acquisition process again after the step-down of three-phase voltage process voltage transformer.The shortcoming of this way is: adopt the voltage after voltage transformer is changed unsteady bigger, increase the intractability of CPU.This product adopts the method for direct dividing potential drop can solve top problem.This product is mainly used in reactive power compensation control at present,
[summary of the invention]
At the problems referred to above of the prior art, the utility model provides a kind of idle compensating control that adopts the dividing potential drop technology, by the direct voltage division processing to three-phase voltage, guarantees the product reliability of operation, can be widely used in the occasion of reactive power compensation.
A kind of idle compensating control by the dividing potential drop sampling comprises:
The current limliting bleeder circuit carries out dividing potential drop to the three-phase voltage signal of importing, and convert thereof into light current and press back input operational amplifier 1;
Operational amplifier 1 presses the three-phase voltage signal after handling to carry out calculus of differences to carrying out light current, and with the input of the signal after computing CPU processing unit;
Operational amplifier 2 provides voltage according to system reference voltage, input operational amplifier 1 another input;
The CPU processing unit links to each other with the output of operational amplifier 1;
Wherein, described operational amplifier 1 is the amplifier for calculus of differences, and described operational amplifier 2 is voltage follower.
This scheme further is optimized for: wherein by big resistance to the three-phase current current limliting, described big resistance is that resistance is greater than the resistance of 200k ohm.
[description of drawings]
Fig. 1 is the idle compensating control structure chart of prior art;
Fig. 2 is the idle compensating control structure chart of employing dividing potential drop technology of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing of the present utility model, the technical solution of the utility model is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Shown in 1, realize reactive power compensation control in the prior art in the following way, specify as follows:
1. by " voltage transformer " three-phase electricity of outside or single-phase electricity voltage are sampled and is converted into low-voltage signal and send " CPU processing unit ".
" electric energy measurement " be used for power that real-time collecting CPU measures and be converted into the number of degrees, send " CPU processing unit " again.
3. " output control " is that " CPU processing unit " is used for the switching control of electric capacity to external world, comprises that direct current output and idle contact export dual mode.
4. " clock circuit " is mainly used to cooperate " data storage circuitry " and " RS232/485 communicating circuit " to use.
5. " RS232/485 communicating circuit " and computer transmission data can be used as data statistics and use, and also can be used as Long-distance Control and use.
6. " data storage circuitry " is used for parameter and the measurement point data that storage system is set.
7. output alarm signal when " warning output circuit " is unusual for systematic survey.
8. " system power supply circuit " is used for powering to system.
For the voltage after the conversion of solution available technology adopting voltage transformer is unsteady bigger, increase the intractability of CPU, the utility model has increased newly by to the dividing potential drop step-down processing before the CPU processing, reduces voltage and floats, and can solve the problems of the technologies described above.
As shown in Figure 2, the utility model three-phase current is through after the current limliting, by operational amplifier 1 circuit, dividing potential drop becomes an input that enters operational amplifier 1 behind the light current, and operational amplifier 1 another input then provides reference voltage by operational amplifier 2 according to the system voltage dividing potential drop; The output of operational amplifier 1 links to each other with the CPU processing unit; Described operational amplifier 1 is the amplifier for calculus of differences, and described operational amplifier 2 is voltage follower.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.
Claims (2)
1. the idle compensating control of dividing potential drop Sampling techniques comprises:
The current limliting bleeder circuit carries out dividing potential drop to the three-phase voltage signal of importing, and converts thereof into light current and presses back input operational amplifier 1;
Operational amplifier 1 presses the three-phase voltage signal after handling to carry out calculus of differences to carrying out light current, and with the input of the signal after computing CPU processing unit;
Operational amplifier 2 provides voltage according to system reference voltage, input operational amplifier 1 another input;
The CPU processing unit links to each other with the output of operational amplifier 1;
Wherein, described operational amplifier 1 is the amplifier for calculus of differences, and described operational amplifier 2 is voltage follower.
2. idle compensating control as claimed in claim 1, wherein by big resistance to the three-phase voltage signal dividing potential drop, described big resistance is that resistance is greater than the resistance of 200k ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320127438 CN203225524U (en) | 2013-03-20 | 2013-03-20 | A reactive compensation controller using voltage division sampling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320127438 CN203225524U (en) | 2013-03-20 | 2013-03-20 | A reactive compensation controller using voltage division sampling technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203225524U true CN203225524U (en) | 2013-10-02 |
Family
ID=49252514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320127438 Expired - Fee Related CN203225524U (en) | 2013-03-20 | 2013-03-20 | A reactive compensation controller using voltage division sampling technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203225524U (en) |
-
2013
- 2013-03-20 CN CN 201320127438 patent/CN203225524U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204333966U (en) | A kind of SCM Based intelligent low-pressure dynamic reactive compensation device | |
| CN204179554U (en) | A kind of precision intelligence power distribution cabinet and distribution drawer thereof | |
| CN203225524U (en) | A reactive compensation controller using voltage division sampling technology | |
| CN205067609U (en) | Electric capacity detecting system based on singlechip | |
| CN201904620U (en) | Novel automatic current-sharing direct-current (DC) power supply | |
| CN202678977U (en) | Reactive power management apparatus for voltage of transformer station | |
| CN203589483U (en) | Mining flameproof high-voltage metering cabinet | |
| CN202050250U (en) | Electric arc furnace reactive compensation control system | |
| CN202957648U (en) | Power supply module for fault indicator | |
| CN203589789U (en) | Battery power supply system | |
| CN201918733U (en) | Automatic control electricity-saving cabinet | |
| CN203967758U (en) | A kind of reactive power compensation system with temperature acquisition function | |
| CN208297607U (en) | power meter | |
| CN202997570U (en) | Automatic control power saving cabinet | |
| CN203218880U (en) | Photovoltaic DC bus grid-connection apparatus | |
| CN202712858U (en) | Magnetic control combination type line voltage reactive management device | |
| CN203811688U (en) | Device for on-line monitoring of capacitor state for reactive compensation module | |
| CN203761135U (en) | Intelligent high-voltage switch | |
| CN203839970U (en) | Dynamic voltage compensation device | |
| CN203014376U (en) | Device for automatically optimizing quality of electricity consumption | |
| CN202759248U (en) | Display device of low voltage reactive power compensation module | |
| CN204858742U (en) | A device for monitoring operation of protection power equipment | |
| CN201656764U (en) | Emi noise shielding device | |
| CN204479171U (en) | A kind of electronic price computing scale | |
| CN204479170U (en) | Adopt the electronic price computing scale that 2V monomer lead-acid battery is powered |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Dingying Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| 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: 20131002 Termination date: 20160320 |