CN106160196A - The uninterruptible power system of distribution transformer interruptedly supplying power concentrator - Google Patents

Abstract

The invention discloses an uninterrupted power supply system of a distribution transformer intermittent power supply concentrator, which belongs to the technical field of electrical equipment. Including solar panels, batteries, inverters, power supply boards, power control boards and their terminals and control circuits, relays, time-delay relays, wire terminal blocks, incoming and outgoing wires, compatible with power and solar power The battery and the distribution transformer use power electricity to supply power to the concentrator and charge the battery when the distribution transformer is working. When the distribution transformer is not working, the solar battery is used to charge the battery. The uninterrupted power supply of the concentrator ensures the perennial use of the distribution transformer intermittent power supply concentrator.

Description

Uninterruptible power supply system of distribution transformer intermittent power supply concentrator

technical field

The invention belongs to the technical field of electrical equipment, and relates to an uninterruptible power supply system for providing power supply for a concentrator when a distribution transformer does not supply power.

Background technique

Distribution transformers (referred to as "distribution transformers") do not need to supply power all year round according to actual needs. For example, distribution transformers for agricultural row only need to supply power during the irrigation season. The distribution transformer concentrator is an intelligent monitoring system responsible for metering, collection, and transmission functions. It can collect distribution transformer power consumption information and send it to the remote client through wireless transmission, so that the client can grasp the distribution transformer power consumption information in time and provide power supply Businesses provide accurate metering information.

When the distribution transformer is running, the concentrator is directly powered by the distribution transformer power supply. However, during the outage period, in order to reduce line loss and achieve effective energy saving and loss reduction, the transformer will be disconnected, and the concentrator will lose the corresponding power supply. At this time, the concentrator cannot collect data, which affects the collection rate accordingly, resulting in Metering is out of control. The concentrator is equipped with a backup ordinary battery, but the battery can only be used for real-time query of power consumption by users, and cannot transmit data. If the distribution transformer transmits electricity for a long time, it is not conducive to energy saving and loss reduction, and it will also increase the fault points to the operation of the power grid virtually; Cost and work intensity of the management unit.

Contents of the invention

The purpose of the present invention is to provide an uninterruptible power supply for the concentrator of distribution transformer intermittent power supply, to provide power supply for the concentrator when the distribution transformer is not supplying power, so as to ensure the normal use of the concentrator collection system, and at the same time be compatible with the use period of the distribution transformer The power electricity, so that the distribution transformer concentrator can transmit signals normally all the year round. The purpose of the present invention is achieved through the following technical solutions.

The uninterruptible power supply system of the distribution transformer intermittent power supply concentrator, including solar panels, batteries, inverters, power supply boards, power control boards and the terminals and control circuits on them, relays, delay relays, and wire terminals Arrangement, incoming and outgoing lines, solar panels, batteries, inverters and power supply boards are connected to the power control board through corresponding terminals; the incoming lines are introduced into the power supply from the distribution transformer, and the power supply is connected through the wire terminal block At the common end of the delay relay, there is a phase wire and a ground wire connected to the control end of the delay relay and the relay at the same time, the purpose is to control at the same time, but also connected to the power supply board; The AC output from the inverter, the common terminal of the relay is connected to the output AC of the inverter, and the two lines output from the normally closed terminal (the output terminal of the relay) are connected to the corresponding two lines of the output terminal (normally open terminal) of the delay relay (such as C phase and ground wire); the normally open end (output end) of the delay relay is connected to the wire terminal block of the outgoing line, and the outgoing line is connected to the concentrator. The current generated by the solar panel charges the battery through the control circuit of the power control board, and the battery converts the direct current into 220V alternating current through the inverter. The AC power generated by the inverter and the AC power (power power) of the distribution transformer are controlled by relays and delay relays. When there is power power, the power power is used to power the concentrator. When there is no power power, the 220V AC power converted by the inverter is the concentrator. powered by.

Further, the control circuit on the power control board includes a clock circuit, a battery voltage detection circuit, an inverter output control circuit, a charge control circuit and a power charge detection circuit.

Further, it also includes a display button board, and the power control board also includes a display button interface, and the display button board is connected to the display button interface on the power control board through a cable.

Further, it also includes a box body, the storage battery, the inverter, the power supply board, the power control board, the wire terminal block, the relay and the delay relay are located in the box body, and the solar panel is located on the top of the box body.

Further, the box body also includes a fixing device for fixing on an electric pole.

Solar panel: According to the local sunshine conditions and the time when uninterruptible power supply is required, choose the appropriate specification, such as the common 18V5W solar panel. The solar panel is installed on the top of the box and is connected to the solar incoming terminal of the power control board through wires. The current generated by the solar panel passes through the forward diode on the power control board (to prevent the current backflow when there is no power at night, and also to prevent power The current reverse flow during battery charging) enters the charging control circuit (the charging control circuit solves the problem that the control board can also be charged when the control board is out of power, and at the same time it can be controlled to prevent recharging when it is fully charged), and then connects the battery through the terminal of the battery Connect and charge the battery.

Battery: You can choose a conventional lead-acid battery, such as a battery with a specification of 12V4AH. The battery is installed at the bottom of the box, and its function is to store electricity, supply power to the power control board, and supply power to the concentrator through the inverter.

Power supply board: Its function is to convert the power of the distribution transformer into direct current to charge the battery. Select a transformer with appropriate specifications (such as 12V3W) according to the needs. The power supply of this board is 220V AC, which is rectified by the bridge to obtain DC power. The DC power is connected to the power charging terminal on the power control board through terminals and wires. The forward diode (to prevent current backflow when there is no power and also prevent current backflow when solar charging) enters the charging control circuit (the charging control circuit solves the problem that the control board can be charged when the control board is dead, and when it is fully charged It can be controlled to prevent recharging), and then connect to the storage battery through the terminal of the storage battery and charge the storage battery. In front of the diode, lead a line on the circuit board to connect to the power charging detection circuit.

Inverter: Select the appropriate specification according to the current used by the concentrator. Its function is to convert the DC power of the battery into the AC power used by the concentrator. The battery is connected to the inverter through the inverter output control circuit on the power control board, and the 220V AC output from the inverter supplies power to the concentrator through the normally closed end of the relay.

Relay: Its function is to work together with the time-delay relay to ensure that the power and inverter output power are disconnected from each other, preventing the situation that the power and inverter output power supply power to the concentrator at the same time. The relay is controlled by the power supply. The relay controls the 220V AC output from the inverter, and the common output of the relay is connected to the normally closed interface. When the control terminal of the relay has no power, the 220V AC output from the inverter passes directly through The outgoing terminal supplies power to the concentrator. When the control end of the relay has power (that is, there is power), the relay works to the normally open end, so that the output power of the inverter is disconnected and no longer supplies power to the concentrator.

Delay relay: The delay relay is to delay the work of the relay. This system uses a delay of 0 to 10 seconds. The customer can adjust it by himself, or it can be adjusted during production after confirmation. The time-delay relay is controlled by the power supply, and what the time-delay relay controls is the power supply, and what is connected is that the common terminal output of the time-delay relay is a normally open terminal. When the power is on, the delay relay and the control terminal of the relay are powered on at the same time, but the relay works first to disconnect the 220V AC output from the inverter, and after a few seconds, the delay relay works to make the power conduction to supply power to the concentrator .

Incoming wire terminal block: it is to introduce power from the transformer distribution box, and connect to the common end of the delay relay.

Outgoing wire terminal block: lead out from the normally open end of the delay relay, and then lead out to the concentrator.

Power control board: The power control board includes a control chip, a clock circuit, a battery voltage detection circuit, an inverter output control circuit, a charging control circuit, a power charging detection circuit, and solar terminals, power charging terminals, battery terminals, Inverter terminal, display button interface. The control chip is the brain of the entire power control board, controlling all circuits. The clock circuit is powered by the button battery and 3.3V. This is because when there is no battery, the button battery supplies power to the clock chip, so that the date and time do not need to be adjusted when the power is turned on next time. The battery voltage detection circuit is to test the voltage of the battery. When the highest voltage of the battery is reached, the charging control circuit will be activated to stop charging the battery; when the voltage is low to a certain value, the charging control circuit will work to charge the battery. Inverter output control circuit, which is to control whether the battery supplies power to the inverter. When the time is up to turn on the inverter, the circuit is started to supply power to the concentrator. When the time is up, it is turned off and no longer supplies power to the inverter. ; When it is detected that there is power electricity, it will no longer supply power to the inverter no matter what time. Charging control circuit, this circuit is to control whether to charge the battery, when the battery voltage reaches the highest voltage, it controls the circuit to stop charging the battery, and when the battery voltage reaches the lowest voltage, it controls the circuit to charge the battery. Power charging detection circuit, this circuit is to detect whether there is power electricity. When there is power electricity, the test pin rises from low level to high level, so that the control chip controls the inverter output control circuit, and no longer powers the inverter. power supply. The solar terminal is connected to the lead wire from the solar panel. The charging terminal of the power battery is connected to the lead wire from the power supply board of the power battery. Battery terminal, this terminal is connected to the battery. Inverter terminal, this terminal is connected to the inverter. Display button interface, this interface is connected to the display button board through a cable.

Display button board: This board is installed on the front board of the shell and is used to adjust the time, that is, the time of adjusting the power control board should be consistent with the time and date on the concentrator. The display part is a double-row six-digit digital tube, and the upper six digits display the year (for example, in 2016, only 16 is displayed), month, and day; the last four digits in the lower row display the hour (in 24-hour format) and minutes. The four buttons from left to right are: set, increase, decrease, and confirm. Press any of the four buttons and the display will light up. After pressing the setting, the "year" will jump. At this time, press the increase or decrease button to adjust to the desired "year", and then press the setting button "month" will jump, keep pressing the setting button, "day", "hour" and "minute" will all be displayed. Jump to set, and finally press OK to set successfully. The display turns off after a few seconds.

The uninterruptible power supply system of the distribution transformer intermittent power supply concentrator provided by the present invention can be compatible with power electricity and solar cells. When the distribution transformer is working, the power electricity is used to supply power to the concentrator and to charge the storage battery. When the distribution transformer is not working, it uses The solar battery charges the battery, and the DC power of the battery is converted into AC power through the inverter to supply power to the concentrator, so as to realize the uninterrupted power supply of the concentrator and ensure the year-round use of the concentrator with intermittent power supply of distribution transformers.

Description of drawings

Fig. 1 is a schematic structural diagram of the uninterruptible power supply system of the distribution transformer intermittent power supply concentrator of the present invention.

Fig. 2 is a schematic circuit diagram of the uninterruptible power supply system of the distribution transformer intermittent power supply concentrator of the present invention.

Fig. 3 is a schematic diagram of the installation state of the uninterruptible power supply system of the distribution transformer intermittent power supply concentrator of the present invention.

Reference signs: 1, solar battery panel; 2, shell; 3, fixed ear; 4, front shell; 5, display button board; 6, setting button; 7, outgoing line; 8, incoming line; 9, storage battery; Wire terminal block; 11. Delay relay lead-out line; 12. Power line input delay relay line and relay control line; 13. Time delay relay; 14. Relay; 15. 220V line output by inverter; 16. Relay normal Closed end output line; 17. Inverter; 18. Power supply board; 19. Inverter 12V incoming line; 20. Battery line; 21. Power supply board leads to power control board; 22. Power control board; 23. Solar panel incoming line; 24. Supply 220V wires to power supply board; 25. Telephone pole; 26. Concentrator box.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

The uninterruptible power supply system of the distribution transformer intermittent power supply concentrator, including solar panel 1, storage battery 9, inverter 17, power supply board 18, power supply control board 22 and its connection terminals and control circuit, relay 14, Delay relay 13, wire terminal block 10, incoming wire 8 and outgoing wire 7. The solar battery panel 1 is connected to the solar connection terminal on the power control board 22 through the solar panel incoming line 23, the battery 9 is connected to the battery connection terminal on the power control board 22 through the battery line 20, and the inverter 17 is fed through the inverter 12V. Line 19 is connected to the inverter terminal on the power control board 22, and the power supply enters the power supply board 18 through the 220V electric wire 24 for the power supply board, and then enters the power control board lead wire 21 through the power supply board to connect to the power control board. The power electric charging connection terminal on the board 22. Accumulator 9, inverter 17, power supply board 18, power control board 22, wire terminal block 10, relay 14 and delay relay 13 are positioned at casing, and solar panel 1 is positioned at casing top. A display button board 5 is installed on the front shell 4 of the box body, and a display button 6 is arranged on the display button board 5 . The box shell 2 also includes fixing ears 3 for fixing on the utility pole 25 .

The incoming line 8 on the wire terminal block 10 introduces the power from the distribution transformer, and the power enters the delay relay line through the power line and the relay control line 12 is connected to the common end of the delay relay 13; the delay relay 13 controls the power, Time-delay relay 13 control ends connect the control end of relay 14; Relay 14 controls the alternating current that inverter 17 outputs, and the normally closed end output line 16 of relay 14 connects the 220V line 15 that inverter outputs; The normally open end of delay relay 13 The outgoing wire 11 is connected to the concentrator through the outgoing wire 7 on the wire terminal block 10 , and the concentrator is installed in the concentrator box 26 . The current generated by the solar panel charges the battery through the control circuit of the power control board, and the battery converts the direct current into 220V alternating current through the inverter. The AC power generated by the inverter and the AC power (power power) of the distribution transformer are controlled by relays and delay relays. When there is power power, the power power is used to power the concentrator. When there is no power power, the 220V AC power converted by the inverter is the concentrator. powered by.

Claims (5)

1. the uninterruptible power system of distribution transformer interruptedly supplying power concentrator, it is characterised in that include solar panel, storage Battery, inverter, power current power panel, power board and binding post thereon and control circuit, relay, time delay relay Device, entering line and outlet, wire terminal row, solar panel, accumulator, inverter and power current power panel are respectively by corresponding Binding post be connected with power board；Entering line and introduce power current from distribution transformer, power current is connect by wire terminal row At the common port of time-delay relay, there are a phase line and ground wire to receive control end and the power of time-delay relay and relay simultaneously On electricity power panel；Time-delay relay controls power current, the alternating current of Control inverter output, the public termination of relay The output AC electricity of inverter, the outfan of relay is normal-closed end, and time-delay relay outfan is normally opened end, and relay exports The two lines two lines corresponding with time-delay relay outfan of end connects；The electric wire of outlet received by the outfan of time-delay relay In terminal block, outlet is connected on concentrator.

The uninterruptible power system of distribution transformer interruptedly supplying power concentrator the most according to claim 1, it is characterised in that Control circuit on power board includes clock circuit, accumulator voltage detecting circuit, inverter output control circuit, charging Control circuit and power recharge testing circuit.

The uninterruptible power system of distribution transformer interruptedly supplying power concentrator the most according to claim 1 and 2, its feature exists In, also including display button plate, power board also includes display button interface, display button plate is by winding displacement and power supply control Display button interface in making sheet connects.

The uninterruptible power system of distribution transformer interruptedly supplying power concentrator the most according to claim 1 and 2, its feature exists In, also include that casing, accumulator, inverter, power current power panel, power board, wire terminal row, relay and time delay continue Electrical equipment is positioned at casing, and solar panel is positioned at casing top.

The uninterruptible power system of distribution transformer interruptedly supplying power concentrator the most according to claim 4, it is characterised in that Described casing also includes fixing device.