Summary of the invention
Technical problem to be solved by this invention is that providing a kind of can carry out intellectuality control to filling with electric process according to the user load situation, improves the storage capacity of solar energy, and realizes the off-grid small-sized solar power plant system and the control method thereof of uninterrupted power supply.
Off-grid small-sized solar power plant system of the present invention includes solar battery group, solar battery group discharges and recharges control switch through one and is connected with two groups of storage batterys that can switch mutually, discharge and recharge control switch and be connected to solar energy alternating current output, discharge and recharge control switch and also be connected to the solar DC output through DC control switch through inversion control switch and inverter; Also include in the system and be connected in the alternating current 220V mains-supplied circuit and city's electric control switch of may command mains-supplied switching; The described control signal importation that discharges and recharges control switch, inversion control switch, DC control switch and city's electric control switch all is connected in the system controlled by computer module, by its switching of system controlled by computer module controls.
The control method that the present invention is based on the off-grid small-sized solar power plant system of said system is:
Gather sunlight with the solar energy component palette, produce electric energy, give the charging of first group storage battery, send indication by the system controlled by computer module after being full of fully and give second group of charging by charging-discharging controller by luminous energy;
When Control System of Microcomputer has detected the load connection by the induction installation in the electricity consumption loaded line, send instruction automatically and connect inversion control switch or DC control switch, power by first group storage battery;
When the first Battery pack voltage drops to set point, start the power supply of second group storage battery, when the second group storage battery voltage also drops to set point, start two group storage batteries parallel operation simultaneously;
When load is excessive when exceeding set point or accumulator electric-quantity when not enough, close storage battery, start city's electric control switch simultaneously, continue powering load by the mains-supplied circuit.
The advantage of system and method for the present invention is:
1, by two group storage batteries is set, and to the charging process control of automaticallying switch, improve the storage capacity of solar energy, also avoided after charge in batteries is full of in traditional solar power system, solar components produces the defective of waste of energy in the wait process, improve efficiency for charge-discharge, also can prolong the useful life of battery.
2, can to carry out intellectuality control with electric process, can realize uninterrupted power supply according to the user load situation, improve solar powered stability and applicability greatly, help it and be widely used in the domestic consumer.
Embodiment
As shown in the figure, off-line type small-sized solar power plant system of the present invention includes solar battery group 1, solar battery group discharges and rechargescontrol switch 2 through one and is connected with two groups of storage batterys that can switch mutually 3, discharge and recharge control switch and be connected to solar energy alternatingcurrent output 7, discharge andrecharge control switch 2 and also be connected tosolar DC output 8 through DC control switch 6 throughinversion control switch 4 andinverter 5; Also include in the system and be connected in the alternating current 220V mains-supplied circuit and city's electric control switch 9 of may command mains-supplied switching; The control signal importation that discharges and rechargescontrol switch 2,inversion control switch 4, DC control switch 6 and city's electric control switch 9 all is connected in the system controlled bycomputer module 10, by its switching of system controlled by computer module controls.
The control method of said system is:
Gather sunlight with the solar energy component palette, produce electric energy, give the charging of first group storage battery, send indication by the system controlled by computer module after being full of fully and give second group of charging by charging-discharging controller by luminous energy;
When Control System of Microcomputer has detected the load connection by the induction installation in the electricity consumption loaded line, send instruction automatically and connect inversion control switch or DC control switch, power by first group storage battery;
When the first Battery pack voltage drops to set point, start the power supply of second group storage battery, when the second group storage battery voltage also drops to set point, start two group storage batteries parallel operation simultaneously;
When load is excessive when exceeding set point or accumulator electric-quantity when not enough, close storage battery, start city's electric control switch simultaneously, continue powering load by the mains-supplied circuit.