KR100340680B1 - Control system - Google Patents

Abstract

PURPOSE: A solar power generation control system is provided to lengthen a lifetime of a battery by reducing a loss of the battery due to an over-charging phenomenon and an over-discharging phenomenon. CONSTITUTION: A solar power generation portion generates electric power by using solar energy. A solar power charge portion stores the electric power generated from the solar power generation portion. A battery monitoring portion monitors an over-charging phenomenon and an over-discharging phenomenon of a battery when the battery is charged with electric power or the battery is discharged. The battery monitoring portion performs the monitoring operation by using a relay. An inverter is used for converting DC power to AC power. A three-phase power supply portion supplies three-phase power.

Description

Solar Power Control System {CONTROL SYSTEM}

The present invention relates to a device capable of generating electricity using a solar panel in an area where electricity is not connected, and the electric current charged by the automatic charging method by the solar panel can prevent overcharge and overdischarge. The long life of the battery, the use of direct current and alternating current, and the alternating current 110 and 220V can be selectively used.

Conventionally, hot water is used by using solar heat, but electricity storage by using solar power only generates DC power, and when overcharged or over-discharged, battery life is shortened and the life is shortened. It was not possible to use in the place where the defect and also need high voltage or the operation of industrial equipment, so it was not limited to the simple use because it did not contribute greatly to the saving of power by using it with solar light.

Therefore, in the present invention, the overcharge prevention circuit and the overdischarge prevention circuit are employed to prevent the use of a short time due to over discharge during charge and discharge and the reduction of the expiration date of the battery due to the overcharge. By selectively using the common voltage 110 and 220V, it can be used in general industrial sites, home lights, mobile toilets, emergency electric appliances, or street lamps, thereby approaching energy saving.

To this end, a photovoltaic charging device that charges electricity generated by the photovoltaic generator and a battery monitoring device that monitors whether the battery is overcharged or overdischarged when the battery is overcharged and overdischarged, and during overcharge or overdischarge The relay is operated only at a certain voltage to ensure stable operation. An inverter that converts direct current to alternating current and a three-phase power supply and phase shifting device when using electricity are configured to form a system.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 6, the overall configuration system of the present invention is a photovoltaic device for charging electricity generated from a photovoltaic generator and a case where the charged electricity is overcharged and overdischarged in a battery. The battery monitoring device that monitors whether overcharged or overdischarged, and the monitoring device operates a relay only at a certain voltage during overcharge or overdischarge to stabilize the use. Inverter that converts DC into AC and uses electricity The three-phase power supply and the phase shifter are the system configurations.

Photovoltaic generators are well known and inverters for converting direct current to alternating current are also known products, and three-phase power supplies and phase shifting devices are also known in construction, and these are taken as the whole system.

Hereinafter, a description of the configuration of the battery monitoring circuit is as follows.

3 is a circuit for monitoring a high state (charge state) of a battery. A diode D1 and a variable resistor VR1 are connected in parallel at a node 1 through a resistor R1 at a battery connected to a relay RY1. The variable resistor VR1 and the resistor R2 are connected in series to ground, and the select switch SW1 is connected between the nodes 2 and 2-1 between the variable resistor VR1 and the resistor R2.

At this time, if the selector switch (SW1) is connected, the monitoring function of the battery is activated. If it is separated, the monitoring function is not activated. It is used selectively when the amount of sunlight is low (when the day is cloudy).

In the variable resistor VR1, the charging voltage can be adjusted by adjusting the input voltage of the comparator IC1. The capacitor C1 is connected and grounded to the node 3 to apply the constant voltage of the comparator. The capacitor and the capacitor C3 and the comparator 6 are connected in parallel, and the node 5, the node 6, and the zener diode Z1 are connected in series and grounded, and the zener diode Z1 is for the constant voltage and at the node 5 the resistor ( R3) is connected to the battery's input terminal.At node 6, a resistor (R4) is connected in parallel with a diode (D2) and a capacitor (C2), and is connected to node 9 through a variable resistor (VR2). It is connected to the base of the resistor R5 and the movable transistor TR1, the collector is connected to the output battery at the node 8 through the resistor R16, and the emitter is connected to the capacitor C8 to the variable resistor VR2. Node 8 Is (the higher the operating voltage) for the load via a resistor (R6) being connected to the base of the transistor (TR2), the collector is connected to the battery output is connected to the emitter of the relay (RY1) is coupled to + end of the battery.

In addition, a relay RY1, a resistor R7, and a diode D3 are connected to the node 9 in parallel.

In addition, the circuit for monitoring the low state (discharge state) of FIG. 3 is connected to the diode D3, the resistor R9, and the variable resistor VR3 in parallel at the node 10 through the battery resistor R8, and is variable. The resistor R3 is connected in series to the resistor VR3 and grounded, the variable resistor VR3 is connected to the capacitor C4 at node 11 and grounded, and the node 12 is connected in parallel with the capacitor C5 and the comparator No. 3 stage. The comparator C5 is connected in series with the comparator No. 2, the node 13, the node 14, and the zener diode (Z2), and the node 13 is connected in series with the resistor R11 and connected with the input battery. At node 14, diode D4 and capacitor C6 are connected in parallel through resistor R12 in series, and variable resistor VR4 at node 17 is connected to relay RY2, and comparator IC2 4. In the first stage, the resistor (R13) and the base of the movable (low operating voltage) transistor (TR3) are connected in series. Connected to the resistor R14 through the node 16 at the collector terminal of the transistor TR3 and connected to the output battery, and the emitter terminal connected to the variable resistor VR4 through the capacitor C7, and the resistor R15 at the node 16. ) Is connected to the base terminal of the load transistor TR4, the collector terminal is connected to the battery, and the emitter terminal is connected to the relay (RY2).

Therefore, if the selection switch (SW) is dropped (short circuit), since the charging is continued through the resistor (R1) and the diode (D1), when there is a lot of sunlight, it is necessary to pay attention to the overcharging. If there is little, there is no fear of overcharging, so it can be dropped and used.

However, when the selector switch (SW) is attached, the battery is charged and at the same time, the voltage set by the variable resistor (VR1) is input to the comparator (IC1) and compared with the comparison voltage of the comparator (IC1). Generate a pulse in IC1).

When a pulse is generated and output to the seventh stage, which is the output terminal of the comparator IC1, when the output voltage is lower than the voltage of the movable transistor TR1 (that is, when the pulse is repeatedly generated up and down), the movable transistor is If it generates a beeping sound that continues to be turned off and overcharges, and the pulse continuously generates a high beeping sound (i.e., when it is continuously high), a voltage is applied to the base terminal of the transistor TR1 and the transistor TR1 is turned on. While conducting, current stored in the capacitor C8 of the emitter flows through the collector stage, and conducts the base terminal of the load transistor TR2, thereby causing the relay RY1 to be driven by the variable resistor VR2 hung on the emitter stage. The moving current flows and the relay RY1, which has been separated, attaches and stops charging.

At this time, in the comparator IC1, the comparison is continuously performed, and when the charge becomes low, the relay RY1 is operated again to start charging.

In addition, in order to prevent over discharge during use, the voltage applied from the comparator IC2 and the voltage set from the variable resistor VR3 are always compared in the use state, and then an output is generated at the output terminal of the comparator IC2. When it is in the high state and then in the low state, the operation of the transistor TR3 is operated in the same manner as described above, and the discharge is stopped while the attached relay RY2 falls.

Therefore, since overcharge and overdischarge are always monitored, the loss of battery due to overcharge and overdischarge can be reduced, so the battery can be used for a long time and the transistor can be used for operation and load. Therefore, even when the comparator operates, the supervisory circuit is monitored again to operate the complete supervisory circuit.

Therefore, by monitoring the high and low battery condition at the same time, the life of the battery can be extended, and thus the loss of power is reduced even when the direct current is converted into alternating current.

1 is a block diagram showing the configuration of the present invention.

2 is a front view showing a function of selecting a control box.

3 is a circuit diagram for adjusting the high state of the battery

4 is a circuit diagram for adjusting the low state of the battery

5 is a circuit diagram showing the connection configuration of the selection switch.

6 is a circuit diagram showing the configuration of the power available state

* Explanation of symbols for main parts of the drawings

R: Resistor TR: Transistor

D: Diode C: Capacitor

VR: Variable resistance RY: Relay

IC: Comparator Z: Zener Diode

SW: switch

Claims (1)

When the voltage set in the variable resistors VR1 and VR3 is input to the comparators IC1 and IC2 and compared with the comparison voltages of the comparators IC1 and IC2, a pulse is generated in the comparators IC1 and IC2. When the output voltage is lower than the voltage of the movable transistors TR1 and TR3 when the output voltage is lower than the voltages of the movable transistors TR1 and TR3, the movable transistor is not operated and becomes overcharged or overdischarged and the pulse is continuously high or low. When a beep signal is generated, the transistors TR1 and TR3 are turned on, and the current stored in the capacitors C8 and C7 of the emitter flows through the collector stage, thereby conducting the base terminals of the load transistors TR2 and TR4. It is configured to monitor the charging and discharging while the relays RY1 and RY2 are operated by the operating current of the relays RY1 and RY2 by the variable resistors VR2 and VR4 on the stages.