CN109548239A - A kind of LED light power control with virtual synchronous machine response mechanism - Google Patents
A kind of LED light power control with virtual synchronous machine response mechanism Download PDFInfo
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- CN109548239A CN109548239A CN201811523765.8A CN201811523765A CN109548239A CN 109548239 A CN109548239 A CN 109548239A CN 201811523765 A CN201811523765 A CN 201811523765A CN 109548239 A CN109548239 A CN 109548239A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a kind of LED light power controls with virtual synchronous machine response mechanism, the device receives the wireless dispatching instruction of the ambient light intensity signal of light intensity sensor measurement, the power grid that voltage sensor measures and LED light power supply coherent signal and the transmission of upper layer energy source dispatch system, and comprehensive descision is made based on these information, the command signal for generating adjusting LED light power supply is respectively sent to for the PFC module and DC/DC module by power grid AC conversion for LED light DC power supply.The working efficiency of LED power can be improved in the present invention, reduces unnecessary energy consumption；It is actively engaged in grid side response simultaneously, improves grid stability；It can also realize modern digital intelligent scheduling, improve the accuracy and efficiency of intelligent scheduling.
Description
Technical field
The present invention relates to a kind of LED light power supply control technologies more particularly to a kind of with virtual synchronous machine response mechanism
LED light power control.
Background technique
In recent years, LED light has obtained extensive promotion and application due to the advantages of because of its low-loss, long-life, green energy conservation.
Driving power as LED lamp " heart " becomes the important component that current LED illumination is promoted and developed.With Science and Technology Day
The different development of crescent, LED power have also obtained quick development, mainly there is constant current mode and type voltage regulation power supply, Jin Jinbao at this stage
Barrier LED power is powered substantially, is also not directed to be actively engaged in the demands such as smart grid frequency modulation, thus is unable to responsive electricity grid and user
Intelligent requirements.
Summary of the invention
Goal of the invention: in view of the above problems in the prior art, the present invention provides a kind of with virtual synchronous machine response mechanism
LED light power control.
Technical solution: LED light power control of the invention includes voltage sensor, light intensity sensor, wireless biography
Defeated module and dsp controller；Voltage sensor measures grid side voltage, grid side input current, output power factor and corrects PFC
The DC voltage and LED light electric current of module output, and it is forwarded to dsp controller；Wherein, PFC module converts AC power source
At the DC power supply of the DC/DC module, DC/DC module provides power supply for LED light；Light intensity sensor measures environmental light intensity
Degree, and it is forwarded to dsp controller；The wireless dispatching instruction of upper layer energy source dispatch system is forwarded to DSP control by wireless transport module
Device processed；Dsp controller is configured to: being calculated mains frequency based on grid side voltage, and is generated based on mains frequency and adjust LED
The first signal and the first indicated value of lamp brightness；The second signal and second of adjusting brightness of LED lamps is generated based on ambient light intensity
Indicated value；It is defeated based on voltage sensor measurement grid side voltage, grid side input current, output power factor correction PFC module
DC voltage and the parsing wireless dispatching instruction of LED light electric current, the third signal and third for generating adjusting brightness of LED lamps out refers to
Indicating value；The first, second, and third signal and respective indicated value based on adjusting brightness of LED lamps generate the first control instruction,
For controlling the DC/DC module.
Further, the direct current that dsp controller is exported also according to grid side voltage, grid side input current and PFC module
Voltage generates the second control instruction, for controlling PFC module.
Further, dsp controller includes analog-digital converter ADC, serial port and the control of virtual synchronous machine response mechanism
Module；ADC receives the analog signal of the measurement result of voltage sensor and light intensity sensor forwarding, and is converted into corresponding number
Word signal；Serial port is for realizing between the wireless transport module and the virtual synchronous machine response mechanism control circuit
Communication；Virtual synchronous machine response mechanism control module include phase-locked loop pll component, direct proportion component, inverse proportion component, parsing refer to
Enable component, instruction priority selection component, PFC module control assembly and DC/DC module control assembly；PLL component is based on power grid
The digital signal of side voltage calculates mains frequency and the relevant sinusoidal signal of power grid；Inverse proportion component is generated based on mains frequency
The first signal and the first indicated value of adjusting brightness of LED lamps；Direct proportion component is generated based on the digital signal of ambient light intensity
The second signal of adjusting brightness of LED lamps and the second indicated value；Analyze the instruction component combination grid side voltage, grid side input electricity
Stream, the DC voltage of PFC module output and the parsing wireless dispatching instruction of LED light electric current, to generate the of adjusting brightness of LED lamps
Three signals and third indicated value；Priority selection component is instructed to produce based on the first, second, and third signal of adjusting brightness of LED lamps
Raw LED light reference current；DC/DC module control assembly is based on the LED light reference current and generates first control instruction；
The digital signal for the DC voltage that PFC control assembly is exported based on grid side voltage, grid side input current and PFC module and
The sinusoidal signal generates second control instruction.
Further, each component in virtual synchronous machine response mechanism control module and its function are by programmable electricity
Road is programmed and realizes.
Further, the first and second control instructions are for controlling power device in PFC module and DC/DC module
Pwm pulse signal.
Further, the third indicated value is consistently higher than the first and second indicated values；First indicated value is with power grid frequency
The increase of rate and increase；Second indicated value increases with the increase of ambient light intensity.
The utility model has the advantages that LED light power control of the invention and method are compared with prior art, advantage are as follows: 1, energy
Enough realize that light is adaptive, to realize energy saving purpose；2, grid stability can be improved with active response mains frequency；3, sharp
It realizes that signal uploads and receive the instruction of scheduling system with wireless transport module, improves the accuracy and efficiency of intelligent scheduling, and
It can be realized the long-range control for LED light power supply；4, by the setting of priority, the continuity of power adjustment can be optimized；5,
Virtual synchronous machine response mechanism and priority setting are only to utilize software realization, at low cost without changing original hardware circuit.
Detailed description of the invention
Fig. 1 is the signal schematic representation powered in the prior art by power grid to LED；
Fig. 2 is the structure chart of LED light power control of the invention；
Fig. 3 is virtual synchronous machine response mechanism control principle drawing in LED light power control of the invention；
Fig. 4 is phaselocked loop component operation schematic diagram of the invention；
Fig. 5 is the working principle diagram of PFC module control assembly of the invention；
Fig. 6 is the working principle diagram of DC/DC module control assembly of the invention.
Wherein:
VligVoltage signal after indicating luminous intensity conversion；
VinIndicate grid side voltage signal；
IinIndicate grid side input current signal；
VdcIndicate the d. c. voltage signal of PFC output；
IoIndicate the current signal of LED light；
Vdc*Indicate output DC voltage reference signal；
Iin*Indicate the input current command signal of net side；
Io*Indicate the current command signal of LED light；
The angular frequency of ω s expression voltage on line side.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in detail.
Such as Fig. 1, current LED light power supply generally passes through the AC power source AC power supply of power grid, by totem pillar output power
The DC power supply of DC/DC module is obtained after factor correcting (Totem Pole PFC) module, then is converted by DC/DC module
Suitable voltage and current is powered for LED light.
In the present invention, it is voltage, the electric current of effectively control LED light power supply, needs to acquire Vin、Iin、VdcAnd Io.Wherein,
VinAnd VdcIt can directly be collected by voltage sensor, IinAnd IoThe electricity in corresponding load can be collected by voltage sensor
It is calculated again by Ohm's law after pressure.
Such as Fig. 2, LED light power control of the invention includes voltage sensor, light intensity sensor, wireless transmission mould
Block and dsp controller.Voltage sensor is for acquiring Vin、Iin、VdcAnd Io, and be converted into low voltage signal and be sent to DSP control
Device.Light intensity sensor is converted into low-voltage letter for measuring to the luminous intensity of environment light, and by the light intensity of measurement
Number being sent to dsp controller is handled.Wireless transport module is for enabling dsp controller to receive by serial port
The wireless dispatching instruction of layer energy source dispatch system transmission, to analyze the instruction information by software protocol.Meanwhile wireless transport module
The energy scheduling response message of dsp controller and the operation information of LED power can be uploaded, upper layer energy source dispatch system is facilitated
Comprehensive analysis simultaneously provides instruction.Low voltage signal and nothing of the dsp controller based on voltage sensor and light intensity sensor transmission
Comprehensive analysis and judgement are made in the wireless dispatching instruction that line transmission module transfers, and generate control PFC module and DC/DC module respectively
Pwm signal, to control power device (for example, GaN HEMT driver) in PFC module and DC/DC module by pwm signal, from
And LED light power supply is controlled, to realize the adjusting to LED light brightness.
Such as Fig. 3, dsp controller includes analog-digital converter ADC, phase-locked loop pll component, PFC control assembly, direct proportion group
Part, inverse proportion component analyze the instruction component, instruction priority selection component and DC-DC control assembly.Wherein, ADC receives Vlig、
Vin、Iin、VdcAnd Io, it is converted to digital signal, is then exported in the other assemblies into dsp controller.For example, VinIt is entered
To PLL component to calculate mains frequency ω s, and mains frequency signal ω s is exported to inverse proportion component.Inverse proportion component is based on electricity
Net frequencies omega s exports the first adjustment signal and corresponding first indicated value of adjusting brightness of LED lamps, and the value of ω s is bigger by first
Indicated value is bigger (meaning that the priority of the first adjustment signal is higher), otherwise the first indicated value is lower.VligIt is output to just
Scaling component, direct proportion component are based on VligThe second adjustment signal and corresponding second indicated value of adjusting brightness of LED lamps are exported,
And VligThe the intensity of corresponding environment light the strong, and the second indicated value is lower (to mean that the priority of the second adjustment signal is got over
It is low).In addition, the wireless dispatching instruction from upper layer energy source dispatch system is by wireless transport module by the serial ports of dsp controller
Port is sent to after receiving and analyzes the instruction component, analyzes the instruction and obtains after component is parsed by software protocol and export adjusting
The third signal of LED light brightness and corresponding third indicated value.Priority selection component is instructed to receive the of adjusting brightness of LED lamps
One, second and third adjustment signal and corresponding indicated value, the size of more each indicated value it is corresponding according to maximum indicated value
Adjustment signal export LED light reference current Io*The signal generated to DC/DC module control assembly, DC/DC module control assembly
For controlling the DC/DC module in Fig. 1.In addition, PLL component also exports sinusoidal signal sin θ to PFC module control group
Part.PFC module control assembly is based on the sinusoidal signal and the V obtained from ADCdc、IinAnd VinIt generates in control figure 1
The control signal of Totem-Pole PFC module.
Particularly, third indicated value (corresponding to wireless dispatching to instruct) can be set to be consistently higher than second under normal conditions
Indicated value (corresponding to ambient light intensity) and the first indicated value (corresponding to mains frequency).First indicated value is big depending on ω s's
Small, the second indicated value depends on VligSize.The indicated value of third instruction can be set to constant.It sets in this way, it can be with
Flexible control to LED power is realized as needed, it may be assumed that more stable in mains frequency and be not received by wireless dispatching instruction
When, preferentially LED luminance is adjusted according to the variation of ambient light intensity (it is bright e.g., to reduce LED light when ambient light is stronger
Degree, on the contrary then increase LED light brightness)；When the larger deviation with rated frequency occurs in mains frequency, mains frequency is paid the utmost attention to
Variation；And when receiving wireless dispatching instruction, preferentially execute dispatch command.
Such as Fig. 4, the PLL component in dsp controller includes second order improper integral (SOGI), PARK transformation, LPF filtering and pressure
Control oscillator (VCO) four submodules.Second order improper integral (SOGI) mainly converts 2 mutually for single-phase voltage signal Uin
Vertical α β coordinate signal, wherein α coordinate signal and original Uin keep same-phase；PARK transformation converts α β coordinate signal
For with 2 orthogonal dq coordinate signals of synchronous reference axis rotation；Wherein q axis signal filters out high frequency by LPF filter
Signal, output only retain the DC component of reaction voltage on line side synchronization signal；VCO sub-module accesses the DC component, passes through
The frequency of power grid is exported after proportional component, it is bright to provide automatic adjustment according to the frequency for virtual synchronous machine response mechanism control module
Spend the reference current of LED light power supply；In addition, the frequency of output power grid is by will realize voltage on line side phase after integral element
Tracking, finally after the calculating of simple trigonometric function, sinusoidal signal sin θ to PFC module of the output for PFC control is controlled
Component, and generate the cosine signal cos θ for PARK conversion.
PFC module control assembly is used to control the switch of power device in PFC module, to realize DC-side Voltage Stabilization,
Realize the power-balance of load-side and net side.Such as Fig. 5, PFC module control assembly includes voltage control and 2 rings of current control
Section, wherein voltage control is outer ring, and current control is inner ring, and the control speed of inner ring is faster than outer ring.Voltage loop is by DC voltage
UdcWith setting reference value Udc*Difference comparsion link and PI controlling unit composition, output are the amplitude of electric current loop reference signal；Electricity
The input reference signal I of the sinusoidal signal product composition electric current loop of pressure ring output and software phase-lock loop outputin*, then IinAnd Iin*
Difference is done, and is input to PR controlling unit, last PR controlling unit output duty cycle signal to PWM module, PWM module output
Pwm pulse signal controls the power device in PFC module.
Such as Fig. 6, dsp controller receives the I from virtual synchronous machine response mechanism control moduleo*Afterwards, by Io*With LED
The actual measured value I of lamp currentoDifference comparsion link is formed, is instructed using PI controlling unit output duty cycle, then PWM mould
The pwm pulse signal of the instruction morphing DC/DC module that DC power supply is provided as LED light of the duty ratio is controlled power device by block
Part is cut-off, and finally realizes the closed-loop control of LED light brightness.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of LED light power control, which is characterized in that including voltage sensor, light intensity sensor, wireless transmission mould
Block and dsp controller；
Voltage sensor measures the direct current that grid side voltage, grid side input current, output power factor correction PFC module export
Voltage and LED light electric current, and it is forwarded to dsp controller；Wherein, AC power source is converted to the DC/DC module by PFC module
DC power supply, DC/DC module provides power supply for LED light；
Light intensity sensor measures ambient light intensity, and is forwarded to dsp controller；
The wireless dispatching instruction of upper layer energy source dispatch system is forwarded to dsp controller by wireless transport module；
Dsp controller is configured to: being calculated mains frequency based on grid side voltage, and is generated based on mains frequency and adjust LED
The first signal and the first indicated value of lamp brightness；The second signal and second of adjusting brightness of LED lamps is generated based on ambient light intensity
Indicated value；It is defeated based on voltage sensor measurement grid side voltage, grid side input current, output power factor correction PFC module
DC voltage and the parsing wireless dispatching instruction of LED light electric current, the third signal and third for generating adjusting brightness of LED lamps out refers to
Indicating value；The first, second, and third signal and respective indicated value based on adjusting brightness of LED lamps generate the first control instruction,
For controlling the DC/DC module.
2. LED light power control according to claim 1, which is characterized in that dsp controller is also according to grid side electricity
The DC voltage of pressure, grid side input current and PFC module output generates the second control instruction, for controlling to PFC module
System.
3. LED light power control according to claim 2, which is characterized in that the dsp controller includes that modulus turns
Parallel operation ADC, serial port and virtual synchronous machine response mechanism control module；
ADC receives the analog signal of the measurement result of voltage sensor and light intensity sensor forwarding, and is converted into corresponding number
Word signal；
Serial port is for realizing logical between the wireless transport module and the virtual synchronous machine response mechanism control circuit
News；
Virtual synchronous machine response mechanism control module include phase-locked loop pll component, direct proportion component, inverse proportion component, parsing refer to
Enable component, instruction priority selection component, PFC module control assembly and DC/DC module control assembly；
PLL component calculates mains frequency and the relevant sinusoidal signal of power grid based on the digital signal of grid side voltage；
Inverse proportion component generates the first signal and the first indicated value of adjusting brightness of LED lamps based on mains frequency；
Direct proportion component generates the second signal and the second instruction of adjusting brightness of LED lamps based on the digital signal of ambient light intensity
Value；
Analyze the instruction the DC voltage and LED light that component combination grid side voltage, grid side input current, PFC module export
Electric current parses wireless dispatching instruction, to generate the third signal and third indicated value of adjusting brightness of LED lamps；
Instruct the big of priority selection first, second, and third signal and respective indicated value of the component based on adjusting brightness of LED lamps
Small generation LED light reference current；
DC/DC module control assembly is based on the LED light reference current and generates first control instruction；
The digital signal for the DC voltage that PFC control assembly is exported based on grid side voltage, grid side input current and PFC module
And the sinusoidal signal generates second control instruction.
4. LED light power control according to claim 3, which is characterized in that the virtual synchronous machine response mechanism
Each component and its function in control module are realized and being programmed to programmable circuit.
5. LED light power control according to claim 1, which is characterized in that the first and second control instructions are to use
The pwm pulse signal of power device in control PFC module and DC/DC module.
6. LED light power control according to claim 1, which is characterized in that the third indicated value is consistently higher than
First and second indicated values；First indicated value increases with the increase of mains frequency；Second indicated value is with ambient light intensity
Increase and increase.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523765.8A CN109548239B (en) | 2018-12-13 | 2018-12-13 | LED lamp power supply control device with virtual synchronous machine response mechanism |
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|---|---|---|---|
| CN201811523765.8A CN109548239B (en) | 2018-12-13 | 2018-12-13 | LED lamp power supply control device with virtual synchronous machine response mechanism |
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| CN109548239B CN109548239B (en) | 2020-08-11 |
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