CN1278468C

CN1278468C - Method for distributing DC power source and devices

Info

Publication number: CN1278468C
Application number: CN 02112814
Authority: CN
Inventors: 张炫; 肖艳义
Original assignee: 厦门协成实业有限公司
Current assignee: Xiamen Lanxi Tech Co Ltd
Priority date: 2002-03-25
Filing date: 2002-03-25
Publication date: 2006-10-04
Anticipated expiration: 2022-03-25
Also published as: CN1447489A

Abstract

The present invention relates to a method for distributing a DC power source and a device thereof. A DC power source device is directly arranged in an instrument box in an intelligent developing cabinet, or is arranged in an electric control box of an outdoor device, wherein the DC power source device is composed of three parts of an AC/DC conversion unit, a DC/DC conversion unit, and a management unit of a CPU single chip computer; the input end of the AC/DC conversion unit is connected with an external power, and the output end of the AC/DC conversion unit is connected with the input end of the DC/DC conversion unit. The AC/DC conversion unit outputs direct currents in a low voltage mode for supplying the operation of a management unit of a CPU single chip computer and charging an accumulator, and the output end port of the DC/DC conversion unit outputs direct currents for the recurrent load of a system. The output end port of the management unit of a CPU single chip computer respectively outputs signals for controlling the operation of the AC/DC conversion unit, the DC/DC conversion unit and the accumulator, and the output end port of the management unit of a CPU single chip computer supplies operational status signals of a direct current electrical power system for remote maintenance and management. The method of the present invention has the advantages of simpleness and practicality, the device of the present invention has the advantages of small volume, high integrated level, intelligence and network.

Description

The distributed DC supply unit

Technical field

The present invention relates to field of power supplies, especially a kind of distributed DC supply unit.

Prior art

Power supply has a wide range of applications in national economy, and wherein direct current cabinet system and alternating current operation power-supply system are two kinds of form of power that power engineering is often used, and they have all adopted centralized method of supplying power to; For the alternating current operation power-supply system, although little, in light weight, the simple in structure system reliability of its volume is poor, thereby serial communication port lacks telemanagement and maintenance function, uncomfortable cooperation intelligent power use because it is not provided with; For the direct current cabinet system, though it has overcome the drawback of alternating current operation power-supply system, but system complex, big, the Heavy Weight of volume, particularly it is in use, when causing power-fail in case break down in a certain loop of system, then can influence the operate as normal in other loop of system, its reliability is reduced; Comprehensive above-mentioned two kinds of power-supply systems, they all also exist the single defective of electric means, therefore must location mode or its device of direct current cabinet system and alternating current operation power-supply system be improved.

Summary of the invention

One of purpose of the present invention is all to be equipped with a design philosophy of overlapping DC power supply according to each switch cubicle a kind of distributed DC supply unit is provided.

Technical scheme of the present invention is achieved in that

A kind of location mode of DC power supply, it changes concentration supply power is distributed power supply, wherein continuous-current plant is installed in each intelligence developed cabinet respectively or is installed in respectively in the electric operating case of outdoor installation, realizes decentralized power supply.

The method of this distributed power supply is not by one group of many intelligence developed cabinet of supply unit control and electric operating case; Like this, when breaking down and when having disturbed the supply unit in this loop in a certain loop in the circuit, the supply unit in other circuit loop is unaffected and still can continue to use, and compares with the direct current cabinet system of centrally connected power supply, and its reliability improves greatly.

Location mode according to above-mentioned DC power supply, a kind of continuous-current plant of corresponding distributed with it is provided, it is made up of AC/DC converter unit, DC/DC converter unit and CPU single-chip microcomputer administrative unit three parts, the input of AC/DC converter unit connects external power source, its output connects the input of DC/DC converter unit, and export dc low-voltage for CPU single-chip microcomputer administrative unit work and charge in batteries, the output port output DC of DC/DC converter unit is for the regular load of system; The output of CPU single-chip microcomputer administrative unit output signal respectively is used to control AC/DC converter unit, DC/DC converter unit and battery-operated.

CPU single-chip microcomputer administrative unit leaves the communication output, provides this DC power system working state signal for remote maintenance and management.

The distributed DC supply unit is mainly used in switchette station and user's end, for switchgear such as circuit breaker, on-load switch etc. provide direct current operative power source, for secondary intelligent apparatus (terminal) and communicator provide the non-stop run power supply, directly replace original direct current cabinet system and alternating current operation power-supply system.Because the direct current cabinet system cost is nearly 100,000, for the switchette station, invest relatively greatly, and the related distributed DC supply unit of the present invention only is several thousand yuan, greatly reduces cost of investment; And distributed DC supply unit volume of the present invention is little, does not additionally take up room, and is particularly suitable for requiring responsive client to taking up an area of.

Because the built-in single-chip microcomputer of above-mentioned distributed DC supply unit manages and safeguards power-supply system, central control room can communicate by interface and this device, thereby real-time monitoring and distant place attended operation have been realized to power-supply system, it be except can being provided the charge power supply by civil power, thereby can also directly provide charge power supply to simplify the design and the configuration of the electricity consumption in the switchyard by the PT and the CT that are installed in the switch cubicle.And because it has adopted the HF switch technology, making it that volume is little, efficient is high, is the supply unit of a kind of intellectuality and networking, has vast market prospect.

Description of drawings

Fig. 1 is the fundamental diagram of distributed DC supply unit;

Fig. 2 is a distributed DC supply unit AC/DC converter unit module circuit diagram;

Fig. 3 is the circuit diagram of distributed DC supply unit DC/DC converter unit module;

The integrated package Wiring port figure that Fig. 4 is connected with circuit port shown in Fig. 3, this integrated package are positioned at distributed DC supply unit DC/DC converter unit module;

Fig. 5 is the circuit diagram of the CPU single-chip microcomputer that is electrically connected with circuit port shown in Figure 3;

Fig. 6 is each working cell and the interface distributed circuit figure of distributed DC supply unit CPU one-chip computer module.

Embodiment

Referring to Fig. 1, a kind of distributed DC supply unit is provided, it is by the AC/DC converter unit, DC/DC converter unit and CPU single-chip microcomputer administrative unit three parts are formed, the input of AC/DC converter unit connects external power source, this external power source both can be 220 volts of civil powers, also can import 100 volts of alternating currents or import 5 alternating currents of pacifying by voltage transformer pt by current transformer CT, its output connects the input of DC/DC converter unit, and the output dc low-voltage supplies CPU single-chip microcomputer administrative unit work and charge in batteries for 12 volts, the regular load that 220 volts of direct currents of output port output of DC/DC converter unit supply system; As microcomputer protecting device, signal lamp and communication terminal etc., the impact load of system such as energy storage motor, switching winding and the closing coil etc. of operating mechanism then provide energy by storage battery short-term heavy-current discharge, when external power source was undesired, then all loads provided energy by storage battery; The output of CPU single-chip microcomputer administrative unit output signal respectively is used to control AC/DC converter unit, DC/DC converter unit and battery-operated, CPU single-chip microcomputer administrative unit leaves communication output (RS485/RS232), provides this DC power system working state signal for remote maintenance and management.Please with further reference to following

Embodiment:

Referring to Fig. 2, the AC/DC module circuit diagram of aforesaid distributed DC supply unit, its circuit is made of power supply (being civil power or PT input or CT input), filter circuit 11, rectification circuit 12, overvoltage crowbar 13, transformer 14, main switch 15, current-limiting circuit 16, negative-feedback circuit 17, and respectively defining the correct wiring of port by shown in Figure 2 in regular turn, the output interface 18 of CPU places in the feedback circuit 17; Its output port two ends 12 volts of direct currents of output are for CPU single-chip microcomputer administrative unit work and charge in batteries;

Referring to Fig. 3, aforesaid distributed DC supply unit DC/DC converter unit circuit diagram, it is made of storage capacitor 21, power push-pull circuit 22, rectification circuit 23, filter circuit 24 in regular turn, and respectively defines the correct wiring of port by shown in Figure 3.

Referring to Fig. 4, this integrated package U is 8 pin, each function pin is defined as: its 2nd, 3,5,7 four pin are standby pin for the NC pin, its the 1st pin connects 12 volts of the output voltages of AC/DC circuit, it is ground connection that the 4th pin meets GND, the 6th pin meets a utmost point SA1 of the switching tube of push-pull circuit 22, and the 8th pin meets a utmost point SA2 of another switching tube of push-pull circuit 22.

Referring to Fig. 5, cpu i/f input two ends DC+ or DC-be the end of the same name of circuit shown in the map interlinking 3 respectively, and cpu i/f output two ends JZ7 or GND connect the end of the same name of CPU single chip circuit respectively.

Referring to Fig. 6, provided each built-up circuit of CPU one-chip computer module and the function pin figure of integrated package, it is made up of the circuit of integrated package U1-U5 or function pin name, four pin expansion analog channel JZ, 7 kinds of status display circuits of this device, the wiring of JZ1-JZ5, the partial circuit composition diagram of CPU constitute.

9 kinds of status indicator lamps shown in Figure 6 are that LED1-LED9 all is arranged on the panel, respectively to should have charged state, discharge to safeguard, cell voltage is normal, battery damages, commutating voltage is normal, 220 volts direct current output is normal, storage capacitor is normal, serial port sends that data are normal, serial port reception data are normal; Its back side is provided with mains switch SA, start button SB, Insurance Block FU1 and FU2, also is provided with 12 interface XT1 to XT12, corresponds to serial communication port ground wire GND, serial communication port incoming line RXD, serial communication port output line TXD, serial communication port NC, high-voltage energy storage capacitor device negative pole C-, the anodal C+ of high-voltage energy storage capacitor device, 220 volts of output negative poles of direct current, 220 volts of output cathodes of direct current, energy storage battery negative pole BAT-, the anodal BAT+ of energy storage battery in regular turn, exchanges zero line N, exchanges live wire L.

Distributed DC supply unit after above-mentioned the setting, during use, host switch SA closes, if civil power is normal, then main frame enters operating state at once, and energy storage capacitor LED7, charged state LED1, the normal LED3 of cell voltage, the normal LED5 of commutating voltage, 220 volts of direct currents are exported normal LED6 indicator light and sent green glow; Close host switch SA, if there is not a civil power, then press start button SB, main frame enters by the storage battery power supply state, and energy storage capacitor LED7, the normal LED3 of cell voltage, the normal LED5 of commutating voltage, 220 volts of direct currents are exported normal LED6 indicator light and sent green glow, and charged state LED1 indicator light goes out.

Variation by above-mentioned indicator light can be distinguished different conditions, and also being convenient to the present invention can fix a breakdown and operate as normal.

Wherein 12 volts storage battery provides as standard fitting, and the CT input unit is then proposed by the user as optional component.

A kind of location mode of this device is provided below, adopt instrumented to clamp mode, the user only needs in the instrument box in intelligence developed cabinet or opens a rectangular opening on the door-plate of the electric operating case of outdoor installation to get final product, it is directly installed on intelligence developed cabinet and the electric operating case, and its rectangular opening is of a size of 170 millimeters * 70 millimeters.

Claims

1, a kind of distributed DC supply unit, it is characterized in that: it is made up of AC/DC converter unit, DC/DC converter unit and CPU single-chip microcomputer administrative unit three parts, the input of AC/DC converter unit connects external power source, its output connects the input of DC/DC converter unit, and export dc low-voltage for CPU single-chip microcomputer administrative unit work and charge in batteries, the output port output DC of DC/DC converter unit is for the regular load of system; The output of CPU single-chip microcomputer administrative unit output signal respectively is used to control AC/DC converter unit, DC/DC converter unit and battery-operated.

2, distributed DC supply unit as claimed in claim 1 is characterized in that: CPU single-chip microcomputer administrative unit leaves the communication output, provides this DC power system working state signal for remote maintenance and management.

3, distributed DC supply unit as claimed in claim 1 is characterized in that: its front plate is provided with 9 kinds of status indicator lamps; Backplate is provided with two Insurance Blocks, mains switch, start button, 12 circuit interfaces.