CN209805496U - power distribution automation terminal power supply system - Google Patents
power distribution automation terminal power supply system Download PDFInfo
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- CN209805496U CN209805496U CN201920469102.6U CN201920469102U CN209805496U CN 209805496 U CN209805496 U CN 209805496U CN 201920469102 U CN201920469102 U CN 201920469102U CN 209805496 U CN209805496 U CN 209805496U
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- distribution automation
- automation terminal
- electrically connected
- optocoupler
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Abstract
The utility model discloses a distribution automation terminal power supply system, which comprises a rectifying circuit, an isolating circuit and a voltage stabilizing circuit which are connected in sequence, wherein the output end of the voltage stabilizing circuit is electrically connected with a distribution automation terminal; still including consecutive battery, battery warning circuit and EMC protection circuit, the input of battery with the isolating circuit output links to each other, EMC protection circuit with voltage stabilizing circuit electricity is connected. The influence of interference signal to distribution automation terminal electrical power generating system voltage can be eliminated to isolator circuit and first opto-coupler to the battery warning circuit at isolator circuit and first opto-coupler place links to each other with distribution automation terminal through voltage stabilizing circuit respectively, and voltage stabilizing circuit keeps supply voltage's stability, has guaranteed distribution automation terminal electrical power generating system to distribution automation terminal constant voltage power supply.
Description
Technical Field
The utility model relates to a power technology field especially relates to a distribution automation terminal electrical power generating system.
Background
The distribution automation station terminal is generally installed at a conventional switching station, a ring main unit, a small-sized substation, a box-type substation and the like, and is used for completing the acquisition of remote measurement and remote signaling data of the switching equipment, switching on and off operation of the switching equipment, and realizing fault identification and isolation of a feeder line and recovery power supply of a non-fault area. The terminal of the distribution automation station needs to continue to operate after power failure, and generally a large-capacity lead-acid storage battery is used as a standby power supply of the device to provide electric energy for the device after power failure. At the same time, under normal conditions, the terminals of the distribution automation station need a direct current power supply to supply power to the terminals.
A general distribution automation station terminal uses a power supply and battery management module to implement the charging and discharging management of the storage battery and the power supply of the terminal under normal conditions. The module supplies power to the distribution terminal and the voltage changes along with the voltage change of the storage battery, when the fault voltage of the storage battery is very low, the supply voltage of the distribution terminal is low, and the terminal cannot work normally.
SUMMERY OF THE UTILITY MODEL
the utility model discloses the technical problem that will solve is: a power distribution automation terminal power supply system with constant voltage power supply is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: a power supply system of a distribution automation terminal comprises a rectifying circuit, an isolating circuit and a voltage stabilizing circuit which are connected in sequence, wherein the output end of the voltage stabilizing circuit is electrically connected with the distribution automation terminal; the storage battery is connected with the isolation circuit, and the EMC protection circuit is electrically connected with the voltage stabilizing circuit;
The storage battery warning circuit comprises a triode, a first optocoupler, a first TVS tube and a second TVS tube, wherein the base electrode of the triode is connected with the anode of the first TVS tube and the first optocoupler respectively, the first TVS tube is connected in parallel with the primary side of the first optocoupler, and the second TVS tube is connected in parallel with the secondary side of the first optocoupler.
Furthermore, the battery pack further comprises an electronic switch which is electrically connected between the isolation circuit and the storage battery.
The constant-current charging circuit comprises a current acquisition circuit, a voltage acquisition circuit, a shunt reference source, a second optocoupler and a PWM chip, wherein the input end of the shunt reference source is electrically connected with the current acquisition circuit and the voltage acquisition circuit respectively, the output end of the shunt reference source is electrically connected with the second optocoupler, the second optocoupler is coupled with the PWM chip, and the PWM chip is electrically connected with the storage battery.
Furthermore, the current acquisition circuit comprises a first operational amplifier and a second operational amplifier, and the storage battery is electrically connected with the shunt reference source through the first operational amplifier and the second operational amplifier in sequence.
The constant current charging circuit comprises a constant current charging circuit, a control circuit and a control circuit, wherein the control circuit is connected with the constant current charging circuit, the control circuit comprises a dial switch, a core control module, a relay and a resistor, the dial switch is connected with the input end of the core control module, and the output end of the core control module is electrically connected with the resistor through the relay.
Furthermore, the adjusting circuit further comprises a third optical coupler, and the third optical coupler is electrically connected to the input end of the core control module.
The beneficial effects of the utility model reside in that: the influence of interference signal to distribution automation terminal electrical power generating system voltage can be eliminated to isolator circuit and first opto-coupler to the battery warning circuit at isolator circuit and first opto-coupler place links to each other with distribution automation terminal through voltage stabilizing circuit respectively, and voltage stabilizing circuit keeps supply voltage's stability, has guaranteed distribution automation terminal electrical power generating system to distribution automation terminal constant voltage power supply.
drawings
Fig. 1 is a schematic diagram of a power distribution automation terminal power supply system according to a first embodiment of the present invention;
Fig. 2 is a battery alarm circuit diagram of a power distribution automation terminal power supply system according to a first embodiment of the present invention;
Fig. 3 is a constant current charging circuit diagram of a power distribution automation terminal power supply system according to a first embodiment of the present invention;
Fig. 4 is a regulating circuit diagram of a power distribution automation terminal power supply system according to a first embodiment of the present invention.
Description of reference numerals:
Q1, triode;
OC1, a first optocoupler;
OC2, a second optocoupler;
OC3, third optocoupler;
t1, a first TVS tube;
T2, a second TVS tube;
U1, shunt reference source;
U2, a first operational amplifier;
U3, a second operational amplifier;
U4, a core control module;
U5, relay;
1. a rectifying circuit;
2. an isolation circuit;
3. A voltage stabilizing circuit;
4. A power distribution automation terminal;
5. A constant current charging circuit;
6. a storage battery;
7. A battery alarm circuit;
8. EMC protection circuit.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the influence of interference signals on the power system voltage of the distribution automation terminal can be eliminated by the isolation circuit and the first optical coupler, and the storage battery alarm circuit where the isolation circuit and the first optical coupler are located is connected with the distribution automation terminal through the voltage stabilizing circuit respectively.
Referring to fig. 1 to 4, a power supply system of a distribution automation terminal includes a rectification circuit 1, an isolation circuit 2 and a voltage stabilizing circuit 3, which are connected in sequence, wherein an output end of the voltage stabilizing circuit 3 is electrically connected with the distribution automation terminal 4; the device also comprises a storage battery 6, a storage battery alarm circuit 7 and an EMC protection circuit 8 which are sequentially connected, wherein the storage battery 6 is connected with the isolation circuit 2, and the EMC protection circuit 8 is electrically connected with the voltage stabilizing circuit 3;
The storage battery warning circuit 7 comprises a triode Q1, a first optocoupler OC1, a first TVS tube T1 and a second TVS tube T2, wherein a base electrode of the triode Q1 is respectively connected with an anode of the first TVS tube T1 and a first optocoupler OC1, the first TVS tube T1 is connected in parallel with a primary side of the first optocoupler OC1, and the second TVS tube T2 is connected in parallel with a secondary side of the first optocoupler OC 1.
the working principle of the utility model is as follows: the input end and the output end of the isolation circuit are isolated from each other, so that the stability and reliability of the current of the output end are ensured to a certain extent, the primary side and the secondary side of the first optocoupler isolate the interference of an input signal to the storage battery alarm circuit 7, and the intensity of the interference signal is weakened; the voltage stabilizing circuit always keeps the stability of the power supply voltage.
from the above description, the beneficial effects of the present invention are: the influence of interference signal to distribution automation terminal electrical power generating system voltage can be eliminated to isolator circuit and first opto-coupler to the battery warning circuit 7 at isolator circuit and first opto-coupler place links to each other with distribution automation terminal through voltage stabilizing circuit respectively, and voltage stabilizing circuit keeps supply voltage's stability, has guaranteed distribution automation terminal electrical power generating system to distribution automation terminal constant voltage power supply.
Further, the device also comprises an electronic switch which is electrically connected between the isolation circuit 2 and the storage battery 6.
As can be seen from the above description, the electronic switch can freely control the connection or disconnection of the storage battery to or from the isolation circuit.
further, the charging device further comprises a constant current charging circuit 5, wherein the constant current charging circuit 5 comprises a current collecting circuit, a voltage collecting circuit, a shunt reference source U1, a second optical coupler OC2 and a PWM chip, the input end of the shunt reference source U1 is electrically connected with the current collecting circuit and the voltage collecting circuit respectively, the output end of the shunt reference source U1 is electrically connected with the second optical coupler OC2, the second optical coupler OC2 is coupled with the PWM chip, and the PWM chip is electrically connected with the storage battery 6.
according to the description, the constant-current charging circuit can be regulated and controlled according to the collected circuit information, the charging current of the constant-current charging circuit is stabilized, and the service life of the storage battery is prolonged.
further, the current collection circuit comprises a first operational amplifier U2 and a second operational amplifier U3, and the storage battery 6 is electrically connected with the shunt reference source U1 through the first operational amplifier U2 and the second operational amplifier U3 in sequence.
As can be seen from the above description, the first operational amplifier and the second operational amplifier perform operations of amplifying and comparing the collected signal.
further, the constant current charging circuit comprises a regulating circuit connected with the constant current charging circuit 5, wherein the regulating circuit comprises a dial switch, a core control module U4, a relay U5 and a resistor, the dial switch is connected to the input end of the core control module U4, and the output end of the core control module U4 is electrically connected with the resistor through the relay U5.
further, the regulating circuit further comprises a third optical coupler OC3, and the third optical coupler OC3 is electrically connected to an input end of the core control module U4.
As can be seen from the above description, the third optocoupler can reduce the intensity of the interference signal, and ensure the stability of the regulating circuit.
example one
Referring to fig. 1 to 4, a first embodiment of the present invention is: a power supply system of a distribution automation terminal comprises a rectifying circuit 1, an isolating circuit 2 and a voltage stabilizing circuit 3 which are connected in sequence, wherein the output end of the voltage stabilizing circuit 3 is electrically connected with a distribution automation terminal 4; the device also comprises a storage battery 6, a storage battery alarm circuit 7 and an EMC protection circuit 8 which are sequentially connected, wherein the storage battery 6 is connected with the isolation circuit 2, and the EMC protection circuit 8 is electrically connected with the voltage stabilizing circuit 3;
The storage battery warning circuit 7 comprises a triode Q1, a first optocoupler OC1, a first TVS tube T1 and a second TVS tube T2, wherein a base electrode of the triode Q1 is respectively connected with an anode of the first TVS tube T1 and a first optocoupler OC1, the first TVS tube T1 is connected in parallel with a primary side of the first optocoupler OC1, and the second TVS tube T2 is connected in parallel with a secondary side of the second optocoupler OC 2.
In detail, a filter circuit and two common mode inductors are further arranged on a secondary side of the first optocoupler OC1, the filter circuit comprises a resistor and a capacitor, and the resistor and the capacitor form an LC filter circuit; specifically, the first TVS tube T1 mainly plays a role in protection, and prevents the first optical coupler OC1 from being damaged under strong magnetic field interference, and the second TVS tube T2 mainly plays a role in differential mode interference protection.
when the storage battery 6 is fully charged, the voltage of the storage battery 6 passing through the divider resistor and then positioned in the triode Q1 is larger than 2.5V, at the moment, the triode Q1 is not conducted, and the battery undervoltage alarm signal is at a high level. When the storage battery 6 discharges and the voltage drops, when the voltage drops to the voltage of the triode Q1 and is less than 2.5V, the triode Q1 is conducted, the battery under-voltage alarm signal is at a low level, namely, the battery under-voltage alarm, and the model of the triode Q1 is TL431 AC.
optionally, the system further comprises an electronic switch, the electronic switch is electrically connected between the isolation circuit 2 and the storage battery 6, the electronic switch is a MOSFET tube, the rectification circuit 1, the isolation circuit 2 and the voltage stabilizing circuit 3 form a main circuit of the system, when the main circuit normally supplies power to a terminal, the MOSFET tube is conducted in the forward direction, a bus on the isolation circuit 2 charges the storage battery 6, when the main circuit loses power, the MOSFET is conducted in the reverse direction, the storage battery 6 supplies power to the terminal, but after the voltage of the storage battery 6 drops to a closing point, the MOSFET tube is turned off, and the storage battery 6 stops discharging.
The constant-current charging circuit 5 comprises a current acquisition circuit, a voltage acquisition circuit, a shunt reference source U1, a second optical coupler OC2 and a PWM chip, wherein the input end of the shunt reference source U1 is electrically connected with the current acquisition circuit and the voltage acquisition circuit respectively, the output end of the shunt reference source U1 is electrically connected with the second optical coupler OC2, the second optical coupler OC2 is coupled with the PWM chip, and the PWM chip is electrically connected with the storage battery 6. It is easily understood that the constant current charging circuit 5 charges the secondary battery 6 with a constant current, and when the voltage of the secondary battery 6 approaches a set value, the charging circuit charges the secondary battery 6 in a constant voltage manner.
The current acquisition circuit comprises a first operational amplifier U2 and a second operational amplifier U3, and the storage battery 6 is electrically connected with the shunt reference source U1 through the first operational amplifier U2 and the second operational amplifier U3 in sequence.
The constant-current charging circuit is characterized by further comprising a regulating circuit connected with the constant-current charging circuit 5, wherein the regulating circuit comprises a dial switch, a core control module U4, a relay U5 and a resistor, the dial switch is connected to the input end of the core control module U4, and the output end of the core control module U4 is electrically connected with the resistor through the relay U5.
In detail, the dial switch is a single-pole three-throw switch, and three gears of the switch are correspondingly provided with the relay U5 and the resistor, which respectively correspond to charging currents of 0.7A, 1.2A and 2.4A.
The regulating circuit further comprises a third optical coupler OC3, and the third optical coupler OC3 is electrically connected to the input end of the core control module U4.
to sum up, the utility model provides a distribution automation terminal power supply system, the influence of interference signal to distribution automation terminal power supply system voltage can be eliminated to isolator circuit and first opto-coupler to the battery warning circuit at isolator circuit and first opto-coupler place links to each other with distribution automation terminal through voltage stabilizing circuit respectively, and voltage stabilizing circuit keeps supply voltage's stability, has guaranteed distribution automation terminal power supply system to distribution automation terminal constant voltage power supply.
the above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (6)
1. a distribution automation terminal power supply system characterized in that: the power distribution system comprises a rectifying circuit, an isolating circuit and a voltage stabilizing circuit which are connected in sequence, wherein the output end of the voltage stabilizing circuit is electrically connected with a power distribution automation terminal; the storage battery is connected with the isolation circuit, and the EMC protection circuit is electrically connected with the voltage stabilizing circuit;
the storage battery warning circuit comprises a triode, a first optocoupler, a first TVS tube and a second TVS tube, wherein the base electrode of the triode is connected with the anode of the first TVS tube and the first optocoupler respectively, the first TVS tube is connected in parallel with the primary side of the first optocoupler, and the second TVS tube is connected in parallel with the secondary side of the first optocoupler.
2. The power distribution automation terminal power system of claim 1, wherein: the battery pack further comprises an electronic switch which is electrically connected between the isolation circuit and the storage battery.
3. The power distribution automation terminal power system of claim 1, wherein: the constant-current charging circuit comprises a current acquisition circuit, a voltage acquisition circuit, a shunt reference source, a second optocoupler and a PWM chip, wherein the input end of the shunt reference source is electrically connected with the current acquisition circuit and the voltage acquisition circuit respectively, the output end of the shunt reference source is electrically connected with the second optocoupler, the second optocoupler is coupled with the PWM chip, and the PWM chip is electrically connected with the storage battery.
4. the distribution automation terminal power system of claim 3, wherein: the current acquisition circuit comprises a first operational amplifier and a second operational amplifier, and the storage battery is electrically connected with the shunt reference source through the first operational amplifier and the second operational amplifier in sequence.
5. the distribution automation terminal power system of claim 3, wherein: the constant current charging circuit comprises a constant current charging circuit, and is characterized by further comprising a regulating circuit connected with the constant current charging circuit, wherein the regulating circuit comprises a dial switch, a core control module, a relay and a resistor, the dial switch is connected to the input end of the core control module, and the output end of the core control module is electrically connected with the resistor through the relay.
6. the distribution automation terminal power system of claim 5, wherein: the regulating circuit further comprises a third optocoupler, wherein the third optocoupler is electrically connected to the input end of the core control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920469102.6U CN209805496U (en) | 2019-04-08 | 2019-04-08 | power distribution automation terminal power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920469102.6U CN209805496U (en) | 2019-04-08 | 2019-04-08 | power distribution automation terminal power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209805496U true CN209805496U (en) | 2019-12-17 |
Family
ID=68828420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920469102.6U Active CN209805496U (en) | 2019-04-08 | 2019-04-08 | power distribution automation terminal power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209805496U (en) |
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2019
- 2019-04-08 CN CN201920469102.6U patent/CN209805496U/en active Active
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