CN102624427A - Synchronous transmission system of energy and information - Google Patents
Synchronous transmission system of energy and information Download PDFInfo
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- CN102624427A CN102624427A CN2012100553960A CN201210055396A CN102624427A CN 102624427 A CN102624427 A CN 102624427A CN 2012100553960 A CN2012100553960 A CN 2012100553960A CN 201210055396 A CN201210055396 A CN 201210055396A CN 102624427 A CN102624427 A CN 102624427A
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Abstract
The invention discloses a synchronous transmission system of energy and information, which comprises a direct current bus, a direct current power supply and a plurality of energy information transmission units, and the direct current power supply and the plurality of energy information transmission units are connected with the direct current bus. Each energy information transmission unit comprises a Boost circuit, a sampling circuit, a carrier detecting circuit, a control circuit and a driving circuit. The synchronous transmission system of the energy and the information enables power line carrier communication technology to be combined with characteristics of the Boost circuits, achieves synchronous transmission of the energy and the information under the premise that circuit modulation is not required additionally, volume of the system and use of corresponding devices are reduced, extra connecting lines are not required, and characteristics of communication channels can be designed according to requirements.
Description
Technical field
The invention belongs to the power electronics communication technical field, be specifically related to the synchronous transmission system of a kind of energy and information.
Background technology
Along with the develop rapidly of electronic technology, new ideas such as Internet of Things are just progressively accepted by people.No matter be different power converter module in different power conversion system or the same system, want to realize set function,, also need the cooperation and the coordination of communication function each other except the needs power supply provides the electric energy.
In power electronic technology, DC-DC (DC-to-dc) converter is just opening and turn-offing, the conversion and the transmission of realization energy through the control switch pipe originally.When system when a plurality of DC-DC converters are arranged is different power devices, often need add communication function, transmission information between each DC-DC converter, co-ordination.
In the face of power transfer and two kinds of different functions requirements of signal communication, the general function that adopts the different hardware circuit of two covers to handle power transfer and message transmission respectively of traditional solution; The components and parts that this traditional design is used are more, and volume is bigger, needs extra connecting line.
At present, in the communications field, power line carrier communication (PLC) technology has obtained broad research and application.On its power line that carrier signal is added to,, avoided extra wiring through existing power circuit transmission data.But the realization of power line carrier communication often needs extra carrier modulation circuit, and this circuit has comprised coupling transformer, and volume is big, and cost is high; Traditional power line carrier communication is that superimposed digital signal is carried out communication on existing power circuit simultaneously, and the energy that transmits on the circuit is uncontrolled, and the characteristic of channel can not change.
Application number is that 200910191716.3 Chinese patent discloses a kind of energy signal synchronous transmission device and method; This technology has increased signal modulator on main circuit; On the secondary loop, increased signal extraction and ReSet Circuit, the same with power line carrier communication, need to increase extra signal modulator; Increased the volume and the cost of circuit, and just be used for regulating system and inject energy.
Summary of the invention
To the above-mentioned technological deficiency of existing in prior technology, the invention provides the synchronous transmission system of a kind of energy and information, need not to have realized under the prerequisite of extra modulation circuit the synchronous transmission of energy and information.
The synchronous transmission system of a kind of energy and information comprises: the energy information transmission unit that a direct current power supply, a direct current bus and some and corresponding load are connected; Described DC power supply and energy information transmission unit all are connected on the described dc bus.
Described energy information transmission unit comprises:
Boost (boosting) circuit flows to load after the direct current on the dc bus boosted, and produces harmonic signal to dc bus;
Sample circuit is gathered the status signal of load; Described status signal comprises state informations such as current signal, voltage signal;
Carrier detecting circuit receives the harmonic signal that other energy information transmission units produce from dc bus, and this harmonic signal is carried out filtering amplify back outgoing carrier signal;
Control circuit carries out analog-to-digital conversion successively and analyzes identification described carrier signal or status signal, constructs switching signal according to recognition result;
Drive circuit carries out power amplification to described switching signal, and utilizes the switching signal after the power amplification that the switching tube in the Boost circuit is controlled.
Preferably, described Boost circuit comprises an inductance, an electric capacity and two switching tubes; Wherein, an end of inductance links to each other with dc bus, and the other end links to each other with the drain electrode of first switching tube and the drain electrode of second switch pipe; The source electrode of second switch pipe links to each other with an end of electric capacity and an end of load; The source electrode of first switching tube links to each other with the other end of the other end of electric capacity and load and ground connection; Switching signal after the power amplification of the grid reception drive circuit output of first switching tube or second switch pipe; Can prevent that the Boost circuit from getting into the interrupter duty pattern current waveform on the inductance is impacted.
The switching signal that described first switching tube and second switch pipe receive is complementary.
Preferably, described DC power supply is connected on the dc bus through impedance matching network; Can weaken the interference that communication is caused.
Described impedance matching network comprises an inductance, an electric capacity and a resistance; Wherein, an end of inductance links to each other with the positive pole of DC power supply, and the other end links to each other with an end of electric capacity; The other end of electric capacity links to each other with an end of resistance, and the other end of resistance links to each other with the negative pole of DC power supply and ground connection.
Preferably, described control circuit is connected with man-machine interface; Make the user to control to system.
Described control circuit is according to recognition result, through duty ratio or switching frequency adjustment are constructed the corresponding switch signal; Wherein:
For power transfer, make the switching frequency of switching signal constant, the duty ratio of adjustment switching signal;
For message transmission, make the duty ratio of switching signal constant, the switching frequency of adjustment switching signal in each chip period; Described chip period is the integral multiple of switch periods.
Described control circuit is DSP (digital signal processor).
The present invention makes power-line carrier communication combine with the characteristic of Boost circuit; Need not to have realized under the prerequisite of extra modulation circuit the synchronous transmission of energy and information; Reduced the use of the volume and the corresponding components and parts of system; Do not need extra connecting line, and the characteristic of communication channel can design as required also.
The present invention simultaneously is applied to power-supply system, new forms of energy that LED illuminator, electric automobile, many output require and generates electricity by way of merging two or more grid systems etc. fashionablely, can under the prerequisite that does not increase extra modulation circuit, only use a special circuit transmission of power and signal simultaneously; So the present invention can realize centralized control easily, running status detects, and the carrier signal amplitude stabilization, and is irrelevant, only relevant with input voltage and output voltage with load current.
Description of drawings
Fig. 1 is the structural representation of system of the present invention.
Fig. 2 is the structural representation of carrier detecting circuit.
Fig. 3 is the waveform sketch map of switching signal and harmonic signal.
Embodiment
In order to describe the present invention more particularly, technical scheme of the present invention is elaborated below in conjunction with accompanying drawing and embodiment.
Apply the present invention in the LED illuminator, as shown in Figure 1, the synchronous transmission system of a kind of energy and information comprises: a direct current power supply E, a direct current bus and n energy information transmission unit that is connected with corresponding load; N energy information transmission unit all is connected on the dc bus; Load in this execution mode is LED (light-emitting diode).
DC power supply E is connected on the dc bus through impedance matching network; Impedance matching network comprises an inductance L r, a capacitor C r and a resistance R r; Wherein, the end of inductance L r links to each other with the positive pole of DC power supply E, and the other end links to each other with the end of capacitor C r; The other end of capacitor C r links to each other with the end of resistance R r, and the other end of resistance R r links to each other with the negative pole of DC power supply E and ground connection.
The energy information transmission unit comprises Boost circuit, sample circuit, carrier detecting circuit, drive circuit and DSP; Wherein:
The Boost circuit flows to LED after being used for the direct current on the dc bus boosted, and produces harmonic signal to dc bus; In this execution mode, the Boost circuit comprises an inductance L, a capacitor C and two switching tube Q1～Q2; Wherein, an end of inductance L links to each other with dc bus, and the other end links to each other with the drain electrode of the first switching tube Q1 and the drain electrode of second switch Q2 pipe; The source electrode of second switch pipe Q2 links to each other with the anode of an end of capacitor C and LED; The source electrode of the first switching tube Q1 links to each other with the negative electrode of the other end of capacitor C and LED and ground connection; The grid of the first switching tube Q1 and second switch pipe Q2 all receives the switching signal after the power amplification of drive circuit output; The switching signal that the first switching tube Q1 and second switch pipe Q2 receive is complementary.
Sample circuit is used to gather the current signal of LED; In this execution mode, sample circuit is a current sensor.
Carrier detecting circuit is used for receiving the harmonic signal that other energy information transmission units produce from dc bus, and this harmonic signal is carried out filtering amplify back outgoing carrier signal; As shown in Figure 2, in this execution mode, harmonics detection circuit comprises five resistance R 1～R5, three capacitor C 1～C3 and an operational amplifier LM318; Wherein: C1 one termination dc bus, another termination R1; The normal phase input end of another termination of R1 R2, R3 and LM318; The R2 other end and LM318 positive supply termination VCC; The R3 other end and C2 connect and ground connection; Another termination of C2 R4; The inverting input of another termination of R4 R5, C3 and LM318; The negative power end ground connection of LM318; The output of LM318 and the R5 other end and C3 other end company also meet DSP.
DSP is used for carrier signal or current signal are carried out analog-to-digital conversion successively and analyzed identification, through duty ratio or switching frequency adjustment are constructed the corresponding switch signal; Wherein: for power transfer, make the switching frequency of switching signal constant, the duty ratio of adjustment switching signal; For message transmission, make the duty ratio of switching signal constant, the switching frequency of adjustment switching signal in each chip period.In this execution mode, DSP adopts TMS320F28035; Wherein, the DSP in the first energy information transmission unit also is connected with man-machine interface.
Drive circuit is used for switching signal is carried out power amplification, and utilizes the switching signal after the power amplification that the switching tube Q1～Q2 in the Boost circuit is controlled; In this execution mode, drive circuit adopts chip I R2101.
In this execution mode, current sensor collects the current signal (6A) of LED, and DSP carries out analog-to-digital conversion 6 → 110 with this current signal; In order not influence power transfer; DSP makes the duty ratio of switching signal constant, as shown in Figure 3, respectively corresponding three the continuous chip period of three digital quantities of 110; DSP wherein makes the switching frequency of preceding two chip period be f through the switching frequency of adjustment switching signal in each chip period
1, the switching frequency that makes last chip period is f
2(f
2=2f
1), constructing the corresponding switch signal in order to the switching tube in the Boost circuit is controlled, and then the harmonic frequency that the Boost circuit produces is controlled, this harmonic wave can be used as the carrier signal of communication; S among the figure
1Be the switching signal of the first switching tube Q1 in the Boost circuit, i
LCurrent signal (being the harmonic signal that the Boost circuit produces) for inductance L in the Boost circuit.
In the energy information transmission unit, the Boost circuit carries out the transformation of electrical energy transmission as the DC-DC circuit, is the LED power supply; Simultaneously, the Boost circuit can produce certain harmonic wave at input, and is similar with communication carrier, and this harmonic signal can be detected by other unit under the same dc bus; Through controlling the harmonic spectrum that this unit produces, do not influence the power transfer of Boost circuit simultaneously, this harmonic component just can be used as a kind of carrier wave and communicates so, thereby makes system realize the synchronous transmission of energy and information.
Claims (8)
1. the synchronous transmission system of energy and information is characterized in that: comprise the energy information transmission unit that a direct current power supply, a direct current bus and some and corresponding load are connected; Described DC power supply and energy information transmission unit all are connected on the described dc bus;
Described energy information transmission unit comprises:
The Boost circuit flows to load after the direct current on the dc bus boosted, and produces harmonic signal to dc bus;
Sample circuit is gathered the status signal of load;
Carrier detecting circuit receives the harmonic signal that other energy information transmission units produce from dc bus, and this harmonic signal is carried out filtering amplify back outgoing carrier signal;
Control circuit carries out analog-to-digital conversion successively and analyzes identification described carrier signal or status signal, constructs switching signal according to recognition result;
Drive circuit carries out power amplification to described switching signal, and utilizes the switching signal after the power amplification that the switching tube in the Boost circuit is controlled.
2. the synchronous transmission system of energy according to claim 1 and information is characterized in that: described Boost circuit comprises an inductance, an electric capacity and two switching tubes; Wherein, an end of inductance links to each other with dc bus, and the other end links to each other with the drain electrode of first switching tube and the drain electrode of second switch pipe; The source electrode of second switch pipe links to each other with an end of electric capacity and an end of load; The source electrode of first switching tube links to each other with the other end of the other end of electric capacity and load and ground connection; Switching signal after the power amplification of the grid reception drive circuit output of first switching tube or second switch pipe.
3. the synchronous transmission system of energy according to claim 2 and information is characterized in that: the switching signal that described first switching tube and second switch pipe receive is complementary.
4. the synchronous transmission system of energy according to claim 1 and information is characterized in that: described DC power supply is connected on the dc bus through impedance matching network.
5. the synchronous transmission system of energy according to claim 4 and information is characterized in that: described impedance matching network comprises an inductance, an electric capacity and a resistance; Wherein, an end of inductance links to each other with the positive pole of DC power supply, and the other end links to each other with an end of electric capacity; The other end of electric capacity links to each other with an end of resistance, and the other end of resistance links to each other with the negative pole of DC power supply and ground connection.
6. the synchronous transmission system of energy according to claim 1 and information is characterized in that: described control circuit is connected with man-machine interface.
7. the synchronous transmission system of energy according to claim 1 and information is characterized in that: described control circuit is according to recognition result, through duty ratio or switching frequency adjustment are constructed the corresponding switch signal; Wherein:
For power transfer, make the switching frequency of switching signal constant, the duty ratio of adjustment switching signal;
For message transmission, make the duty ratio of switching signal constant, the switching frequency of adjustment switching signal in each chip period.
8. according to the synchronous transmission system of claim 1,6 or 7 described energy and information, it is characterized in that: described control circuit is DSP.
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Cited By (6)
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| CN103368609A (en) * | 2013-06-21 | 2013-10-23 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| CN104065336A (en) * | 2014-06-25 | 2014-09-24 | 浙江大学 | Photovoltaic optimizer with integration of data communication function |
| CN106331563A (en) * | 2016-10-19 | 2017-01-11 | 苏州市纽克斯照明有限公司 | Data signal and DC power source collinear transmission system and method |
| CN109474555A (en) * | 2018-10-22 | 2019-03-15 | 哈尔滨工业大学 | Wireless energy and data synchronous transmission system and its Parameters design based on inductive coupling and FSK modulation |
| WO2023066317A1 (en) * | 2021-10-20 | 2023-04-27 | 杭州禾迈电力电子股份有限公司 | Turn-off device, communication method of turn-off device, and quick turn-off photovoltaic system |
| CN116827385A (en) * | 2023-07-03 | 2023-09-29 | 华北电力大学（保定） | Power information fusion device for DC-DC converter power control loop disturbance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103368609A (en) * | 2013-06-21 | 2013-10-23 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| CN104065336A (en) * | 2014-06-25 | 2014-09-24 | 浙江大学 | Photovoltaic optimizer with integration of data communication function |
| CN104065336B (en) * | 2014-06-25 | 2016-04-06 | 浙江大学 | A kind of photovoltaic optimizer of integrated data communication function |
| CN106331563A (en) * | 2016-10-19 | 2017-01-11 | 苏州市纽克斯照明有限公司 | Data signal and DC power source collinear transmission system and method |
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| CN109474555A (en) * | 2018-10-22 | 2019-03-15 | 哈尔滨工业大学 | Wireless energy and data synchronous transmission system and its Parameters design based on inductive coupling and FSK modulation |
| WO2023066317A1 (en) * | 2021-10-20 | 2023-04-27 | 杭州禾迈电力电子股份有限公司 | Turn-off device, communication method of turn-off device, and quick turn-off photovoltaic system |
| WO2023065135A1 (en) * | 2021-10-20 | 2023-04-27 | 杭州禾迈电力电子股份有限公司 | Shutdown device, communication method for shutdown device, and rapid shutdown photovoltaic system |
| CN116547881A (en) * | 2021-10-20 | 2023-08-04 | 杭州禾迈电力电子股份有限公司 | Shutoff device, communication method of shutoff device and quick shutoff photovoltaic system |
| CN116827385A (en) * | 2023-07-03 | 2023-09-29 | 华北电力大学（保定） | Power information fusion device for DC-DC converter power control loop disturbance |
| CN116827385B (en) * | 2023-07-03 | 2024-03-22 | 华北电力大学（保定） | Power information fusion device for DC-DC converter power control loop disturbance |
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