CN205453145U - Power compensatory control system - Google Patents
Power compensatory control system Download PDFInfo
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- CN205453145U CN205453145U CN201620188831.0U CN201620188831U CN205453145U CN 205453145 U CN205453145 U CN 205453145U CN 201620188831 U CN201620188831 U CN 201620188831U CN 205453145 U CN205453145 U CN 205453145U
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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 discloses a power compensatory control system, including control chip, signal conditioning circuit, pulse driving circuit and blend switch, control chip connects watchdog circuit, external memory, pulse driving circuit, signal conditioning circuit and communication interface circuit respectively, pulse driving circuit other end connection blend switch, signal conditioning circuit still connects voltage signal detection circuit and electric current signal detection circuit respectively. The utility model discloses the system uses reactive power to be main criterion, voltage is the idle compound control mode of voltage of supplementary criterion, utilize the reactive power calibration control to avoid the switching to vibrate, the constrained condition of electric capacity switching is regarded as with grid voltage's limit value, thereby realize the intelligent integrated switching of electric capacity, utilize the capacitance current detection circuitry of frequency selective network in as the filtering link, adopt two -stage frequency -selecting networking and improve the filtering effect, the signal that can make the post -filter is the same with former signal, can detect capacitance current through the electric current that detects former signal like this.
Description
Technical field
This utility model relates to a kind of power system, specifically a kind of power back-off control system.
Background technology
In modern power network, the inductive load such as motor occupies the biggest proportion, and they absorb substantial amounts of reactive power doing man-hour requirement, it is achieved the conversion of energy, drive equipment acting.So, power supply provide electrical power and be not exclusively supplied to active power, a part is also wanted to be converted to reactive power, this adds the burden of electric network source undoubtedly, reduce the efficiency of power supply unit, and due in circuit the existence of reactive current will increase via net loss, reduce the service life of power transmission line, have a strong impact on power supply quality.In order to solve this problem, needing to consume the local of reactive power in circuit provides reactive power, i.e. compensates reactive power, but traditional reactive power compensation device relies on single physical quantity as reference quantity, it is difficult to realize being accurately controlled.
Utility model content
The purpose of this utility model is to provide one to control power back-off control system accurately, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of power back-off control system, including control chip, signal conditioning circuit, pulse driving circuit and combination switch, described control chip connects watchdog circuit, external memory storage, pulse driving circuit, signal conditioning circuit and communication interface circuit respectively, the pulse driving circuit other end connects combination switch, and described signal conditioning circuit is also respectively connected with voltage signal testing circuit and current signal detection circuit；
nullDescribed current signal detection circuit includes amplifier U1、Amplifier U2、Resistance R1、Electric capacity C1 and amplifier U3，Described resistance R1 one end connects A end，The resistance R1 other end connects electric capacity C5，The electric capacity C5 other end connects resistance R2 respectively、Electric capacity C1 and amplifier U1 pin 1，The resistance R2 other end connects the electric capacity C1 other end and B end ground connection respectively，Amplifier U1 pin 2 connects amplifier U1 pin 3 and resistance R3 respectively，The resistance R3 other end connects resistance R4 and amplifier U2 pin 1 respectively，Amplifier U2 pin 2 connects earth resistance R5，Amplifier U2 pin 3 connects the resistance R4 other end and resistance R6 respectively，The resistance R6 other end connects electric capacity C2，The electric capacity C2 other end connects resistance R8 respectively、Resistance R7 and electric capacity C3，The electric capacity C3 other end connects the resistance R7 other end ground connection，The described resistance R8 other end connects resistance R9 and amplifier U3 pin 1 respectively，Amplifier U3 pin 2 connects earth resistance R10，Amplifier U3 pin 3 connects the resistance R9 other end respectively、Ground capacity C4 and outfan C.
As further program of the utility model: described control chip model is TMS320LF2407A.
As further program of the utility model: described side a and b is respectively current transformer secondary two ends.
As further program of the utility model: described amplifier U1 model is ICL7650.
As this utility model further scheme: described amplifier U2 and amplifier U3 model are μ A741.
Compared with prior art, the beneficial effects of the utility model are: this utility model system is with reactive power as main criterion, voltage is the voltage power-less complex controll mode of assistant criteria, reactive power Corrective control is utilized to avoid switching to shake, using the limit value of line voltage as the constraints of capacitor switching, thus realize the intelligent comprehensive switching of electric capacity, utilize frequency-selective network as the capacitance current testing circuit in filtering link, two-stage frequency-selecting networking is used to improve filter effect, filtered signal can be made identical with original signal, so can detect capacitance current by the electric current of detection original signal.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of power back-off control system；
Fig. 2 is the circuit diagram of current signal detection circuit in power back-off control system.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1～2, in this utility model embodiment, a kind of power back-off control system, including control chip, signal conditioning circuit, pulse driving circuit and combination switch, described control chip connects watchdog circuit, external memory storage, pulse driving circuit, signal conditioning circuit and communication interface circuit respectively, the pulse driving circuit other end connects combination switch, and described signal conditioning circuit is also respectively connected with voltage signal testing circuit and current signal detection circuit；nullCurrent signal detection circuit includes amplifier U1、Amplifier U2、Resistance R1、Electric capacity C1 and amplifier U3，Described resistance R1 one end connects A end，The resistance R1 other end connects electric capacity C5，The electric capacity C5 other end connects resistance R2 respectively、Electric capacity C1 and amplifier U1 pin 1，The resistance R2 other end connects the electric capacity C1 other end and B end ground connection respectively，Amplifier U1 pin 2 connects amplifier U1 pin 3 and resistance R3 respectively，The resistance R3 other end connects resistance R4 and amplifier U2 pin 1 respectively，Amplifier U2 pin 2 connects earth resistance R5，Amplifier U2 pin 3 connects the resistance R4 other end and resistance R6 respectively，The resistance R6 other end connects electric capacity C2，The electric capacity C2 other end connects resistance R8 respectively、Resistance R7 and electric capacity C3，The electric capacity C3 other end connects the resistance R7 other end ground connection，The described resistance R8 other end connects resistance R9 and amplifier U3 pin 1 respectively，Amplifier U3 pin 2 connects earth resistance R10，Amplifier U3 pin 3 connects the resistance R9 other end respectively、Ground capacity C4 and outfan C；Control chip model is TMS320LF2407A, and described side a and b is respectively current transformer secondary two ends, and described amplifier U1 model is ICL7650, described amplifier U2 and amplifier U3 model and is μ A741.
Operation principle of the present utility model is: refer to Fig. 1 ~ 2, this utility model system uses TMS320LF2407A to be control chip, have employed centralized compensation mode, it is assemblied on distribution transformer low-voltage bus bar, the whole region load being carried distribution transformer compensates, and utilizes voltage power-less composite switching criterion to judge the switching of electric capacity.This utility model utilizes frequency-selective network as the capacitance current testing circuit in filtering link, two-stage frequency-selecting networking is used to improve filter effect, the voltage follower that two-stage frequency-selecting networking is constituted from zero amplifier followed by ICL7650 high accuracy, to improve the load-carrying ability of frequency-selective network, two-stage μ A741 plays anti-phase amplification, make output and input homophase, filtered signal can be made identical with original signal, so can detect capacitance current by the electric current of detection original signal.
Claims (5)
1. a power back-off control system, including control chip, signal conditioning circuit, pulse driving circuit and combination switch, it is characterized in that, described control chip connects watchdog circuit, external memory storage, pulse driving circuit, signal conditioning circuit and communication interface circuit respectively, the pulse driving circuit other end connects combination switch, and described signal conditioning circuit is also respectively connected with voltage signal testing circuit and current signal detection circuit；
nullDescribed current signal detection circuit includes amplifier U1、Amplifier U2、Resistance R1、Electric capacity C1 and amplifier U3，Described resistance R1 one end connects A end，The resistance R1 other end connects electric capacity C5，The electric capacity C5 other end connects resistance R2 respectively、Electric capacity C1 and amplifier U1 pin 1，The resistance R2 other end connects the electric capacity C1 other end and B end ground connection respectively，Amplifier U1 pin 2 connects amplifier U1 pin 3 and resistance R3 respectively，The resistance R3 other end connects resistance R4 and amplifier U2 pin 1 respectively，Amplifier U2 pin 2 connects earth resistance R5，Amplifier U2 pin 3 connects the resistance R4 other end and resistance R6 respectively，The resistance R6 other end connects electric capacity C2，The electric capacity C2 other end connects resistance R8 respectively、Resistance R7 and electric capacity C3，The electric capacity C3 other end connects the resistance R7 other end ground connection，The described resistance R8 other end connects resistance R9 and amplifier U3 pin 1 respectively，Amplifier U3 pin 2 connects earth resistance R10，Amplifier U3 pin 3 connects the resistance R9 other end respectively、Ground capacity C4 and outfan C.
Power back-off control system the most according to claim 1, it is characterised in that described control chip model is TMS320LF2407A.
Power back-off control system the most according to claim 1, it is characterised in that described side a and b is respectively current transformer secondary two ends.
Power back-off control system the most according to claim 1, it is characterised in that described amplifier U1 model is ICL7650.
Power back-off control system the most according to claim 1, it is characterised in that described amplifier U2 and amplifier U3 model are μ A741.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188831.0U CN205453145U (en) | 2016-03-11 | 2016-03-11 | Power compensatory control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620188831.0U CN205453145U (en) | 2016-03-11 | 2016-03-11 | Power compensatory control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205453145U true CN205453145U (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620188831.0U Expired - Fee Related CN205453145U (en) | 2016-03-11 | 2016-03-11 | Power compensatory control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN205453145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656324A (en) * | 2017-02-16 | 2017-05-10 | 深圳市菲菱科思通信技术股份有限公司 | ONU optical module long luminescence detection device and method based on current |
-
2016
- 2016-03-11 CN CN201620188831.0U patent/CN205453145U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656324A (en) * | 2017-02-16 | 2017-05-10 | 深圳市菲菱科思通信技术股份有限公司 | ONU optical module long luminescence detection device and method based on current |
| CN106656324B (en) * | 2017-02-16 | 2019-11-08 | 深圳市菲菱科思通信技术股份有限公司 | The long luminescence detection apparatus of ONU optical module and method based on electric current |
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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: 20160810 Termination date: 20200311 |