CN201181854Y

CN201181854Y - Photovoltaic door electricity power supply device

Info

Publication number: CN201181854Y
Application number: CNU2008200788645U
Authority: CN
Inventors: 李猛
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-31
Filing date: 2008-01-31
Publication date: 2009-01-14
Anticipated expiration: 2018-01-31

Abstract

The utility model relates to a photovoltaic power-source device, which comprises a charging control circuit, a reversing control circuit and a central control circuit, wherein, the charging control circuit is used for processing the municipal power and the solar; through the charging control circuit, the electric power that is generated by the solar and the municipal power is stored in a battery unit; the reversing control circuit is used for converting the DC electric power that is stored in the battery unit to be loaded AC electric power; the central control circuit is used for monitoring and controlling the AC voltage and the AC current which are outputted by the reversing control circuit. The reversing control circuit is connected with a power-supply load output switch, which adopts the single-circuit three-phase input and three-phase output form. The device has the following advantages: 1. the device has the functions of solar photovoltaic transformation and municipal power compensation power supply; 2. the structure of the circuit is simple, and the power consumption reliability is improved; 3. the central control circuit is adopted monitor, so that the switching speed between the reversing circuit and a bypass circuit is rapid, and the continuity is good, and the output stability is high; 4. the single-way power supply selection of the original converter is changed to the power supply form that can be controlled in interlocking way with three-way input and three-way output, thereby better resolving the phase-sequence balancing problem of the municipal power, and being convenient for the power supply wire distribution and management of the peripheral devices.

Description

Photovoltaic family power supply

Technical field

The utility model belongs to the Application of Solar Energy power technology, is specifically related to a kind of photovoltaic family power supply.

Background technology

Present static battery power supply system generally adopts ac power supply method, promptly after the AC rectification being charge in batteries in the static battery power supply system, when utility grid is cut off the power supply, provide alternating electromotive force with the electric energy that stores in the storage battery by inverter again, existing static battery power supply system has following shortcoming: 1, commercial power charged mode is relied on byer force, can not adapt to the emergency service needs under some particular surroundingss; 2, because civil power is the source that its electric weight is supplied with, under the non-existent situation of civil power, can only keep the supply of electric power of short time.3, because common the employing is dispersed in the Miniature Power Unit that each needs the place of emergency power supply, so cost is higher, costs an arm and a leg, and wiring is complicated, and reliability is low, is not easy to unified maintenance and control and management; Though 4, other employing uninterrupted power supply or the emergency power system of UPS have designed the power supply selector switch, promptly when internal circuit breaks down, the power supply selector switch of controlling this uninterrupted power supply inside switches to mains-supplied, when getting rid of, fault switches back again, but because it is worked electric power is provided always, so influenced useful life and a large amount of electric energy of waste, thereby increased the cost of emergency power supply.

The utility model content

In view of this, main purpose of the present utility model is to provide a kind of photovoltaic family power supply, it adopts set of regions Chinese style solar energy and civil power complimentary fashion, it is simple in structure on the one hand, can realize environmental protection and energy saving, also can reach the dependence regenerative resource on the other hand and form the purpose that continues output power.

For achieving the above object, the technical solution of the utility model is achieved in that a kind of photovoltaic family power supply, comprise the charging control circuit that is used to handle solar energy and civil power, to be stored into batteries by the electric energy that solar energy and civil power produce by charging control circuit, convert the DC electric weight that stores in the batteries inverter control circuit of the AC electric weight that is transmitted to load to, and to the AC voltage of inverter control circuit output, the central control circuit that electric current carries out Monitoring and Controlling.

Described inverter control circuit is connected with the automatic conversion selecting switch of supply load, it adopts the form of single channel three-phase input three-phase output, the output of three road input parallel inverter control circuits of the changing position of this power supply selector switch, entopic three road inputs connect the three-phase of civil power respectively.

Compare with prior art, photovoltaic of the present utility model family power supply has the following advantages:

1, has the function of photovoltaic conversion and civil power supplementary power, can make full use of solar energy, reduce dependence city's electric energy.

2, circuit structure is simple, utilizes inversion transformation technique to convert the storage battery electric energy to sine-wave power, utilizes the power supply selector switch to select again, thereby has strengthened the reliability of electricity consumption.

3, adopt central control circuit in time to monitor the coordinated operation of each parts, the switch speed of inverter circuit and mains circuit is fast, and continuity is good, the output stability height.

4, circuit is provided with failure bypass output, solves the problem of operational reliability better, thereby guarantees the safe class of power supply.

5, original inverter one tunnel power supply selector switch is changed into three tunnel power supply selector switches, solved the problem of phase sequence balance so preferably, thereby be convenient to wiring and management.

Description of drawings

Fig. 1 is a structure principle chart of the present utility model;

Fig. 2 is a commercial power charged control circuit schematic diagram of the present utility model;

Fig. 3 is a solar charging electric control circuit schematic diagram of the present utility model;

Fig. 4 is the program flow diagram of central processing circuit of the present utility model;

Fig. 5 is a connection principle schematic diagram of the present utility model.

Embodiment

Fig. 1 has illustrated photovoltaic of the present utility model family power supply, comprise the charging control circuit 1 that is used to handle civil power and solar energy, this charging control circuit 1 is connected with solar panel 6 and civil power input interface, the electric power of solar panel 6 output powers and city's electrical network is introduced batteries 2 simultaneously through the direct current behind the rectifying and wave-filtering, batteries 2 is connected with inverter control circuit 3 again, to be used for that the DC electric weight is converted to the AC electric weight that is transmitted to load, the AC electric weight of inverter control circuit 3 outputs carries out Monitoring and Controlling by central control circuit 4, described inverter control circuit 3 is connected with the automatic conversion selecting switch 5 of power supply, it adopts the form of single channel three-phase input three-phase output, the output of three road input parallel inverter control circuits of the changing position of this power supply selector switch 5, entopic three road inputs connect the three-phase of civil power respectively.

Fig. 2 has illustrated commercial power charged control circuit principle of the present utility model, when the input single phase poaer supply is input 220V alternating current, it is direct current about 300V that the bridge rectifier of being made up of diode D1, D2, D3 and D4 carries out rectification to civil power, then, carry out the low frequency filtering voltage stabilizing by big capacitor C 1 and C2, two MOS device S1 and S2 form half-bridge inverter.PWM waveform generation part is produced according to feedback voltage by SG3525, by adding high frequency square wave control signal for metal-oxide-semiconductor S 1 and S2, make periodically conducting of S1 and S2, can obtain the adjustable high-frequency alternating current of pulsewidth, T1 is coupled to secondary through high frequency transformer, through rectifying tube D5 and D6 rectification, L1 and C3 filtering obtain low ripple direct voltage at outlet side again.

Control circuit for pulse-width modulation adopts Switching Power Supply special integrated chip SG3525, and SG3525 has two-way to drive output, can connect isolating amplifier circuit, and OUT-A and OUT-B oppositely export, and Dead Time can be set.Control procedure mainly is to move the duty of regulating conducting recently to regulate power output.The phase shift control of phase-shift PWM realizes that by error comparator LM358 the in-phase end E/A+ of error amplifier LM358 (pin 2) connects the voltage signal by single chip computer AT MEL8 control output.End of oppisite phase E/A-(pin 1) connects the feedback signal of main circuit output current or voltage, and the switching between electric current and the voltage negative feedback signal ends realization by the conducting of Schottky diode D10.Feedback signal and normal potential compare, and difference is delivered to the phase shift pulse width controller through amplifying output, and the phase place between control OUT-A and the OUT-B is finally adjusted waveform duty cycle, and voltage and charging current are stabilized on the predetermined value.

Fig. 3 has illustrated solar charging electric control circuit principle of the present utility model, and the direct current that comes from solar panel 6 carries out the low frequency filtering voltage stabilizing through by protection diode D1 by big capacitor C 1 and C2, and two MOS device S1 and S2 form half-bridge inverter.PWM waveform generation part is produced according to feedback voltage by SG3525, by adding high frequency square wave control signal for metal-oxide-semiconductor S1 and S2, make periodically conducting of S1 and S2, can obtain the adjustable high-frequency alternating current of pulsewidth, T1 is coupled to secondary through high frequency transformer, through rectifying tube D5 and D6 rectification, L1 and C3 filtering obtain low ripple direct voltage at outlet side again.

Fig. 4 has illustrated the monitoring flow process of central processing circuit of the present utility model, because need to detect the randomness of civil power work, the time control of inversion work, the control that extraneous light conversion is imitated, to consider also that simultaneously battery has the charge-discharge characteristic of different phase, so charger is wanted can be according to concrete cell types, critical stage has adopted fuzzy control method, and these logical relations realize by program control.The program specific implementation process that is implanted at single chip computer AT MEL8 is: single-chip microcomputer at first carries out initialization, to city's electric parameter measurement, accumulator parameter is measured, enter mode of operation, civil power is in certain hour work, detection is less than civil power, change inversion work over to, battery is lower than certain value and changes civil power work over to.Solar energy is to charge in batteries, exceeds the certain value protection, detects the battery capacity deficiency during work, commercial power chargedly carries out the stage and replenishes.

Fig. 5 is a connection principle schematic diagram of the present utility model, the automatic conversion selecting switch 5 of powering has the form that three tunnel three kinds of approach are imported three tunnel outputs, can be three either-or switch, it also can be one three either-or switch, three road inputs of its changing position A connect three tunnel of civil power respectively, three road inputs of its changing position B connect the output of inverter control circuit, and the power supply that provides after its output output storage battery process inversion conversion is provided.Three road inputs of its static position C connect three tunnel of bypass maintenance input respectively.

The above is preferred embodiment of the present utility model only, is not to be used to limit protection range of the present utility model.

Claims

1, a kind of photovoltaic family power supply, it is characterized in that: comprise the charging control circuit that is used to handle solar energy and civil power, to be stored into batteries by the electric energy that solar energy and civil power produce by charging control circuit, convert the DC electric weight that stores in the batteries inverter control circuit of the AC electric weight that is transmitted to load to, and to the AC voltage of inverter control circuit output, the central control circuit that electric current carries out Monitoring and Controlling.

2, photovoltaic as claimed in claim 1 family power supply, it is characterized in that: described inverter control circuit is connected with the supply load automatic change-over, it adopts the form of single channel three-phase input three-phase output, the output of three road input parallel inverter control circuits of the changing position of this power supply selector switch, entopic three road inputs connect the three-phase of civil power respectively.

3, photovoltaic as claimed in claim 2 family power supply, it is characterized in that: the described charging control circuit that is used to handle civil power comprises by diode D1, D2, the bridge rectifier that D3 and D4 form, big capacitor C 1 constitutes the low frequency filtering voltage stabilizing circuit with C2 and is connected with bridge rectifier, output at the low frequency filtering voltage stabilizing circuit connects by instrument transformer CT, potentiometer VR, and the negative feedback comparison circuit of Schottky diode D10 formation, the negative pole of Schottky diode connects pwm generator SG3525, this pwm generator is connected with error comparator LM358, described error comparator connects the voltage sample end of singlechip chip ATMEL8, potentiometer VR connects the current sample end of singlechip chip ATMEL8, constitute the controlling of sampling circuit, in addition, the two-way of pwm generator SG3525 drives output and is connected to the base stage of being made of the series excitation type oscillating circuit two field effect transistor device S1 and S2 by isolating amplifier circuit, formation can be adjusted the AC wave shape of pulsewidth, the primary side of S1 and S2 and high frequency transformer T1 is connected to form the series excitation type oscillating circuit, the secondary side of high frequency transformer T1 connects the rectification circuit that is made of diode D5 and D6, via the filter circuit that inductance L 1 and capacitor C 3 constitute, the direct current that formation can be modulated.

4; photovoltaic as claimed in claim 2 family power supply; it is characterized in that: the described charging control circuit that is used to handle solar energy comprise input by protection diode D1; the positive pole of described diode D1 is connected with solar panel is anodal; the solar panel negative pole constitutes the low frequency filtering voltage stabilizing circuit with big capacitor C 1 with C2 and is connected; output at the low frequency filtering voltage stabilizing circuit connects by instrument transformer CT; potentiometer VR; and the negative feedback comparison circuit of Schottky diode D10 formation; the negative pole of Schottky diode connects pwm generator SG3525; this pwm generator is connected with error comparator LM358; described error comparator connects the voltage sample end of singlechip chip ATMEL8; potentiometer VR connects the current sample end of singlechip chip ATMEL8; constitute the controlling of sampling circuit; in addition; the two-way of pwm generator SG3525 drives output and is connected to the base stage of being made of the series excitation type oscillating circuit two field effect transistor device S1 and S2 by isolating amplifier circuit; formation can be adjusted the AC wave shape of pulsewidth; the primary side of S1 and S2 and high frequency transformer T1 is connected to form the series excitation type oscillating circuit; the secondary side of high frequency transformer T1 connects the rectification circuit that is made of diode D5 and D6; via the filter circuit that inductance L 1 and capacitor C 3 constitute, the direct current that formation can be modulated.