CN211655839U - Automatic switching circuit of direct current power supply unit of power communication power supply system - Google Patents
Automatic switching circuit of direct current power supply unit of power communication power supply system Download PDFInfo
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- CN211655839U CN211655839U CN202020544647.1U CN202020544647U CN211655839U CN 211655839 U CN211655839 U CN 211655839U CN 202020544647 U CN202020544647 U CN 202020544647U CN 211655839 U CN211655839 U CN 211655839U
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Abstract
The utility model discloses an automatic switching circuit of a DC power supply unit of a power communication power supply system, which comprises a rectifier module switching module, a rectifier module voltage detection module, a rectifier module control module, a storage battery switching module, a storage battery voltage detection module and a storage battery control module; the rectifying module voltage detection module detects and uploads the direct-current bus voltage; the rectification module control module controls the rectification module switching module to work so as to switch in or switch off the rectification module; the storage battery voltage detection module detects and uploads the output voltage of the storage battery pack; the storage battery control module controls the storage battery switching module to work so as to switch in or cut off the corresponding storage battery. The utility model provides a realize freely inserting and amputating of rectifier module and battery, not only guaranteed the reliability of system, guaranteed the safety and stability operation of system moreover, moreover the utility model discloses still easy to carry out.
Description
Technical Field
The utility model particularly relates to an automatic switching circuit of power communication electrical power generating system DC power supply unit.
Background
With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people.
The safe and stable operation of the power communication network is an important guarantee for the safe and stable operation of the power system. The communication transmission equipment in the transformer substation is a basic composition unit of a power communication network and is a foundation for realizing remote communication of the transformer substation. The power supply system of the communication transmission equipment in the transformer substation is the key for stable operation of the power communication network. At present, various communication equipment loads including communication transmission equipment in a transformer substation are generally supplied with direct current, and the direct current power supply system generally comprises an alternating current distribution unit, a rectification unit, a storage battery pack, a direct current distribution unit and the like, and the structural schematic diagram of the direct current power supply system is shown in fig. 1. When the alternating current input, the alternating current distribution unit and the rectification unit of the direct current power supply system normally operate, the communication load is powered by the direct current output of the rectification unit; when the direct current output of the rectifying unit is interrupted, the storage battery pack supplies power to the communication load.
The internal functional block diagram of the rectifying unit is shown in fig. 2: the number of the rectifier modules is generally determined according to the power supply requirement of the communication load in the substation, and although a certain system redundancy is considered when the number of the rectifier modules is configured, the number of the rectifier modules is still limited. When the fault number of the rectifier modules exceeds the system redundancy number and the power supply loading capacity of the rectifier unit does not meet the minimum requirement of a direct current power supply system, the normal operation of the rectifier unit is influenced to different degrees, and even the systematic breakdown and exit of the rectifier unit are caused in serious conditions.
The internal functional block diagram of the battery pack is shown in fig. 3: the accumulator battery is formed by connecting a certain number of single accumulator batteries in series, and the output voltage of the accumulator battery is the sum of the output voltages of the single accumulator batteries. When a single storage battery in the storage battery pack has a fault, the output voltage of the storage battery pack is lower than the rated output voltage of the direct-current power supply system; along with the increase of the number of the storage battery fault sections, the storage battery pack is separated from the direct current power supply system due to the self under-voltage protection mechanism, and further the function and the function of the storage battery pack as a standby power supply of the whole direct current power supply system cannot be exerted.
As can be seen from the above description, in the current dc power supply unit of the power communication power supply system, the number of normal standby modules of the rectifier unit is limited, and the storage battery pack cannot provide a standby storage battery, so that a protection mechanism under a module or storage battery failure condition cannot be efficiently implemented, and the safety and reliability of the system cannot be efficiently ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reliability is high, the practicality is good and implement simple and convenient electric power communication electrical power generating system DC power supply unit automatic switching circuit.
The utility model provides an automatic switching circuit of a DC power supply unit of an electric power communication power supply system, which comprises a rectifier module switching module, a rectifier module voltage detection module, a rectifier module control module, a storage battery switching module, a storage battery voltage detection module and a storage battery control module; the control end of the rectifier module switching module and the rectifier module voltage detection module are both connected with the rectifier module control module, and the control end of the storage battery switching module and the storage battery voltage detection module are both connected with the storage battery control module; the input and output ends of the switching module of the rectifier module are connected in series with the existing rectifier module; the input and output ends of the storage battery switching module are connected in series with the existing storage battery; the rectifying module voltage detection module is used for detecting the voltage of the direct-current bus and uploading a detection result to the rectifying module control module; the rectification module control module is used for controlling the rectification module switching module to work according to the uploaded detection result so as to switch in or switch off the corresponding rectification module; the storage battery voltage detection module is used for detecting the output voltage of the storage battery pack and uploading the detection result to the storage battery control module; the storage battery control module is used for controlling the storage battery switching module to work according to the uploaded detection result, so that the corresponding storage battery is switched in or switched off.
The rectifier module switching module comprises a plurality of paths of rectifier module switching relays and rectifier module switching switch circuits which correspond to the rectifier module switching relays one by one; the rectifier module switching relay is connected with the rectifier module switching switch circuit; the switching switch circuit of the rectifier module is used for controlling the switching relay of the rectifier module to be switched on and off according to the control command issued by the rectifier module control module, so that the corresponding rectifier module is controlled to be switched on or switched off.
The voltage detection module of the rectification module is a circuit consisting of a signal transmitting chip with the model of PCF8591 and a resistance sampling circuit.
The rectification module control module is a circuit formed by a single chip microcomputer with the model number of AT89S 51.
The automatic switching circuit of the direct current power supply unit of the power communication power supply system also comprises a rectifier module display module; and the rectification module display module is connected with the rectification module control module and used for displaying the working data of the rectification module.
The storage battery switching module comprises a plurality of storage battery switching relays and storage battery switching switch circuits which are in one-to-one correspondence with the storage battery switching relays; the storage battery switching relay is connected with the storage battery switching switch circuit; the storage battery switching switch circuit is used for controlling the connection and disconnection of the storage battery switching relay according to a control instruction issued by the storage battery control module, so that the input or the cut-off of the corresponding storage battery is controlled.
The storage battery voltage detection module is a circuit formed by a signal transmitting chip with the model of PCF8591 and a resistance sampling circuit.
The storage battery control module is a circuit formed by a single chip microcomputer with the model number of AT89S 51.
The automatic switching circuit of the direct-current power supply unit of the power communication power supply system also comprises a storage battery display module; the storage battery display module is connected with the storage battery control module and used for displaying the working data of the storage battery.
The utility model provides a pair of this kind of electric power communication electrical power generating system DC supply unit automatic switching circuit, through rectifier module switching module, rectifier module voltage detection module, battery switching module and battery voltage detection module's design and joining, realized the free access and the excision of rectifier module and battery, not only guaranteed the reliability of system, guaranteed the safety and stability operation of system moreover, moreover the utility model discloses still easy to carry out.
Drawings
Fig. 1 is a schematic diagram of functional modules of a dc power supply unit of a conventional power communication power supply system.
Fig. 2 is a block diagram of internal functions of a rectifying unit in a dc power supply unit of a conventional power communication power supply system.
Fig. 3 is a block diagram illustrating internal functions of a battery unit in a dc power supply unit of a conventional power communication power supply system.
Fig. 4 is a functional block diagram of the present invention.
Fig. 5 is a schematic diagram of the circuit principle of the rectifier module switching module, the rectifier module voltage detection module and the rectifier module control module in the present invention.
Fig. 6 is a schematic circuit diagram of the storage battery switching module, the storage battery voltage detection module and the storage battery control module in the present invention.
Detailed Description
Fig. 4 shows a functional block diagram of the present invention: the utility model provides an automatic switching circuit of a DC power supply unit of an electric power communication power supply system, which comprises a rectifier module switching module, a rectifier module voltage detection module, a rectifier module control module, a storage battery switching module, a storage battery voltage detection module and a storage battery control module; the control end of the rectifier module switching module and the rectifier module voltage detection module are both connected with the rectifier module control module, and the control end of the storage battery switching module and the storage battery voltage detection module are both connected with the storage battery control module; the input and output ends of the switching module of the rectifier module are connected in series with the existing rectifier module; the input and output ends of the storage battery switching module are connected in series with the existing storage battery; the rectifying module voltage detection module is used for detecting the voltage of the direct-current bus and uploading a detection result to the rectifying module control module; the rectification module control module is used for controlling the rectification module switching module to work according to the uploaded detection result so as to switch in or switch off the corresponding rectification module; the storage battery voltage detection module is used for detecting the output voltage of the storage battery pack and uploading the detection result to the storage battery control module; the storage battery control module is used for controlling the storage battery switching module to work according to the uploaded detection result, so that the corresponding storage battery is switched in or switched off.
As shown in fig. 5, the utility model provides a rectifier module switching module, rectifier module voltage detection module and rectifier module control module's circuit principle schematic diagram: the automatic switching circuit of the direct-current power supply unit of the power communication power supply system further comprises a rectifier module display module (marked as LCD1 in the figure, and the model is LCD 1602); the rectification module display module is connected with the rectification module control module and used for displaying the working data of the rectification module; the rectifier module switching module comprises a plurality of circuits of rectifier module switching relays (only 3 circuits are shown in the figure, and K1, K2 and K3 are respectively shown) and rectifier module switching switch circuits (comprising resistors R1-R3, triodes Q1-Q3 and diodes D4-D6) which are in one-to-one correspondence with the rectifier module switching relays; the rectifier module switching relay is connected with the rectifier module switching switch circuit; the switching switch circuit of the rectifier module is used for controlling the switching relay of the rectifier module to be switched on and off according to the control command issued by the rectifier module control module, so that the corresponding rectifier module is controlled to be switched on or switched off. The positive pole of a rectifier module in the existing power communication power supply system is generally grounded, and a negative power supply is adopted; the utility model also adopts the connection method.
Specifically, the method comprises the following steps: D1-D3 are rectifier modules;
one end of the AC end of the rectifying module D1 is connected with a zero line N, and the other end is connected with an A phase line through the movable end of a relay K1; the positive end of the output end of the rectifying module D1 is grounded, and the negative end of the output end of the rectifying module D1 outputs OUT1 and is connected to a direct current bus; a control signal Relay1 output by a P1.5 pin of the controller is subjected to current limiting through a resistor R1 and then output to a base stage of a triode Q1; one end of the active end of the triode Q1 is grounded, and the other end of the active end is connected with a power supply signal VCC through a diode D4 and is also connected with the power supply signal VCC through a coil of a relay K1; when the signal Relay1 is at a low level, the triode Q1 is turned on, the coil of the Relay K1 is powered on, the active end of the K1 is closed, the a-phase line is connected to the sorting module D1, and the rectifying module D1 is connected to a line and works.
One end of the AC end of the rectifying module D2 is connected with a zero line N, and the other end of the AC end is connected with a phase line B through the movable end of a relay K2; the positive end of the output end of the rectifying module D2 is grounded, and the negative end of the output end of the rectifying module D2 outputs OUT2 and is connected to a direct current bus; a control signal Relay2 output by a P1.6 pin of the controller is subjected to current limiting through a resistor R2 and then output to a base stage of a triode Q2; one end of the active end of the triode Q2 is grounded, and the other end of the active end is connected with a power supply signal VCC through a diode D5 and is also connected with the power supply signal VCC through a coil of a relay K2; when the signal Relay2 is at a low level, the triode Q2 is turned on, the coil of the Relay K2 is powered on, the active end of the K2 is closed, the B-phase line is connected to the sorting module D2, and the rectifying module D2 is connected to a line and works.
One end of the AC end of the rectifying module D3 is connected with a zero line N, and the other end is connected with a C-phase line through the movable end of a relay K3; the positive end of the output end of the rectifying module D3 is grounded, and the negative end of the output end of the rectifying module D3 outputs OUT3 and is connected to a direct current bus; a control signal Relay3 output by a P1.7 pin of the controller is subjected to current limiting through a resistor R3 and then output to a base stage of a triode Q3; one end of the active end of the triode Q3 is grounded, and the other end of the active end is connected with a power supply signal VCC through a diode D6 and is also connected with the power supply signal VCC through a coil of a relay K3; when the signal Relay3 is at a low level, the triode Q3 is turned on, the coil of the Relay K3 is powered on, the active end of the K3 is closed, the C-phase line is connected to the sorting module D3, and the rectifying module D3 is connected to a line and works.
The rectifier module voltage detection module is a circuit composed of a signal transmitting chip with model number PCF8591 and a resistance sampling circuit (resistors R5 and R6). The OUT is a direct-current bus, the resistors R5 and R6 are used for sampling voltage signals of the direct-current bus, and the sampling signals are connected into pins P2.6 and P2.7 of the chip U1 through buses SCL and SDA after analog-to-digital conversion is carried OUT on the sampling signals through the chip U2; meanwhile, the P2.6 and P2.7 pins of the chip U1 are also corresponding communication pins.
The rectification module control module is a circuit formed by a single chip microcomputer with the model number of AT89S 51: the reset pin RST of the chip U1 is directly grounded through a pull-down resistor R4; the XTAL2 and XTAL1 pins of the chip are connected with a crystal oscillator circuit (comprising a crystal oscillator Y1, a capacitor C2 and a capacitor C3); the P2.0 pin, the P2.1 pin and the P2.2 pin of the chip output control signals and output the control signals to a display screen LCD 1; the P0.0-P0.7 pins of the chip are used as data output pins, and directly output signals to the data pins of the LCD1 display screen and output data.
As shown in fig. 6, the utility model provides a circuit principle schematic diagram of battery switching module, battery voltage detection module and battery control module: the storage battery switching module comprises a plurality of storage battery switching relays (only 3 paths including K1-K3 are shown in the figure) and storage battery switching switch circuits (comprising triodes Q1-Q3, resistors R1-R3 and diodes D1-D3) which are in one-to-one correspondence with the storage battery switching relays; the storage battery switching relay is connected with the storage battery switching switch circuit; the storage battery switching switch circuit is used for controlling the connection and disconnection of the storage battery switching relay according to a control instruction issued by the storage battery control module, so that the input or the cut-off of the corresponding storage battery is controlled. The storage battery display module (marked as LCD1 in the figure, and the model is LCD1602) is connected with the storage battery control module and is used for displaying the working data of the storage battery. The positive pole of a rectifier module in the existing power communication power supply system is generally grounded, and a negative power supply is adopted; the utility model also adopts the connection method.
The positive electrode of the storage battery BT1 is connected with one end of the movable end of the relay K1, the negative electrode of the storage battery BT2 is connected with the common end of the movable end of the relay K2, the positive electrode of the storage battery BT2 is connected with one end of the movable end of the relay K2, the negative electrode of the storage battery BT3 is connected with the common end of the movable end of the relay K3, the positive electrode of the storage battery BT3 is connected with one end of the movable end of the relay K3, and the negative electrode; when one path of control signal Relay1 output by a P1.5 pin of the controller is subjected to current limiting through a resistor R1, the control signal Relay is output to a base stage of a triode Q1; one end of the active end of the triode Q1 is grounded (at this time, the triode Q1 acts as a switch tube), and the other end of the active end is connected with a power supply signal VCC through a diode D1 and is also connected with the power supply signal VCC through a coil of a relay K1; when the signal Relay1 is at a low level, the triode Q1 is conducted at the moment, the coil of the Relay K1 is electrified, the switch of the Relay K1 acts at the moment, the contact point common end is switched from the upper side to the lower side, the storage battery BT1 is connected to a circuit, and the storage battery BT1 starts to supply power.
When one path of control signal Relay2 output by a P1.6 pin of the controller is subjected to current limiting through a resistor R2, the control signal Relay is output to a base stage of a triode Q2; one end of the active end of the triode Q2 is grounded (at this time, the triode Q2 acts as a switch tube), and the other end of the active end is connected with a power supply signal VCC through a diode D2 and is also connected with the power supply signal VCC through a coil of a relay K2; when the signal Relay2 is at a low level, the triode Q2 is conducted at the moment, the coil of the Relay K2 is electrified, the switch of the Relay K2 acts at the moment, the contact point common end is switched from the upper side to the lower side, the storage battery BT2 is connected to a circuit, and the storage battery BT2 starts to supply power.
When one path of control signal Relay3 output by a P1.7 pin of the controller is subjected to current limiting through a resistor R3, the control signal Relay is output to a base stage of a triode Q3; one end of the active end of the triode Q3 is grounded (at this time, the triode Q3 acts as a switch tube), and the other end of the active end is connected with a power supply signal VCC through a diode D3 and is also connected with the power supply signal VCC through a coil of a relay K3; when the signal Relay1 is at a low level, the triode Q3 is conducted at the moment, the coil of the Relay K3 is electrified, the switch of the Relay K3 acts at the moment, the contact point common end is switched from the upper side to the lower side, the storage battery BT3 is connected to a circuit, and the storage battery BT3 starts to supply power.
The storage battery voltage detection module is a circuit formed by a signal transmitting chip with the model of PCF8591 and a resistance sampling circuit; the resistors R5 and R6 are used for sampling the voltage signal output by the battery pack, and after analog-to-digital conversion is performed on the sampled signal by the chip U2, the sampled signal is connected to P2.6 and P2.7 of the chip U1 through the bus lines SCL and SDA. Meanwhile, the P2.6 and P2.7 pins of the chip U1 are also corresponding communication pins.
The storage battery control module is a circuit formed by a single chip microcomputer with the model number of AT89S 51: the reset pin RST of the chip U1 is directly grounded through a pull-down resistor R4; the XTAL2 and XTAL1 pins of the chip are connected with a crystal oscillator circuit (comprising a crystal oscillator Y1, a capacitor C2 and a capacitor C3); the P2.0 pin, the P2.1 pin and the P2.2 pin of the chip output control signals and output the control signals to a display screen LCD 1; the P0.0-P0.7 pins of the chip are used as data output pins, and directly output signals to the data pins of the LCD1 display screen and output data.
Claims (9)
1. An automatic switching circuit of a direct current power supply unit of a power communication power supply system is characterized by comprising a rectification module switching module, a rectification module voltage detection module, a rectification module control module, a storage battery switching module, a storage battery voltage detection module and a storage battery control module; the control end of the rectifier module switching module and the rectifier module voltage detection module are both connected with the rectifier module control module, and the control end of the storage battery switching module and the storage battery voltage detection module are both connected with the storage battery control module; the input and output ends of the switching module of the rectifier module are connected in series with the existing rectifier module; the input and output ends of the storage battery switching module are connected in series with the existing storage battery; the rectifying module voltage detection module is used for detecting the voltage of the direct-current bus and uploading a detection result to the rectifying module control module; the rectification module control module is used for controlling the rectification module switching module to work according to the uploaded detection result so as to switch in or switch off the corresponding rectification module; the storage battery voltage detection module is used for detecting the output voltage of the storage battery pack and uploading the detection result to the storage battery control module; the storage battery control module is used for controlling the storage battery switching module to work according to the uploaded detection result, so that the corresponding storage battery is switched in or switched off.
2. The automatic switching circuit of the DC power supply unit of the power communication power supply system according to claim 1, wherein the rectifier module switching module comprises a plurality of rectifier module switching relays and rectifier module switching switch circuits corresponding to the rectifier module switching relays one to one; the rectifier module switching relay is connected with the rectifier module switching switch circuit; the switching switch circuit of the rectifier module is used for controlling the switching relay of the rectifier module to be switched on and off according to the control command issued by the rectifier module control module, so that the corresponding rectifier module is controlled to be switched on or switched off.
3. The automatic switching circuit of the direct current power supply unit of the power communication power supply system according to claim 2, wherein the voltage detection module of the rectification module is a circuit formed by a signal transmission chip with a model number of PCF8591 and a resistance sampling circuit.
4. The automatic switching circuit of the direct-current power supply unit of the power communication power supply system according to claim 3, wherein the rectifier module control module is a circuit formed by a single chip microcomputer with the model number of AT89S 51.
5. The automatic switching circuit of the DC power supply unit of the power communication power supply system according to any one of claims 2 to 4, wherein the automatic switching circuit of the DC power supply unit of the power communication power supply system further comprises a rectifier module display module; and the rectification module display module is connected with the rectification module control module and used for displaying the working data of the rectification module.
6. The automatic switching circuit of the direct current power supply unit of the power communication power supply system according to claim 1, wherein the storage battery switching module comprises a plurality of storage battery switching relays and storage battery switching switch circuits corresponding to the storage battery switching relays one to one; the storage battery switching relay is connected with the storage battery switching switch circuit; the storage battery switching switch circuit is used for controlling the connection and disconnection of the storage battery switching relay according to a control instruction issued by the storage battery control module, so that the input or the cut-off of the corresponding storage battery is controlled.
7. The automatic switching circuit of the DC power supply unit of the power communication power supply system of claim 6, wherein the battery voltage detection module is a circuit consisting of a signal transmission chip with model number PCF8591 and a resistance sampling circuit.
8. The automatic switching circuit of the direct-current power supply unit of the power communication power supply system according to claim 7, wherein the storage battery control module is a circuit formed by a single chip microcomputer of AT89S51 type.
9. The automatic switching circuit of the DC power supply unit of the power communication power supply system according to any one of claims 6 to 8, wherein the automatic switching circuit of the DC power supply unit of the power communication power supply system further comprises a storage battery display module; the storage battery display module is connected with the storage battery control module and used for displaying the working data of the storage battery.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115333388A (en) * | 2022-10-13 | 2022-11-11 | 石家庄科林电气股份有限公司 | Rectifier module switching method, device, terminal and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115333388A (en) * | 2022-10-13 | 2022-11-11 | 石家庄科林电气股份有限公司 | Rectifier module switching method, device, terminal and storage medium |
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