CN2634712Y - AC/DC power supply microcomputer monitornig integrated device - Google Patents
AC/DC power supply microcomputer monitornig integrated device Download PDFInfo
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- CN2634712Y CN2634712Y CN 03221444 CN03221444U CN2634712Y CN 2634712 Y CN2634712 Y CN 2634712Y CN 03221444 CN03221444 CN 03221444 CN 03221444 U CN03221444 U CN 03221444U CN 2634712 Y CN2634712 Y CN 2634712Y
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model relates to a monitoring device of alternating and direct power supply in the power system, in particular to an integral microcomputer monitoring device for the alternating and direct current power source. The utility model comprises a direct current monitoring system and an alternating current monitoring system. The alternating signals of alternating wires are connected with a CPU through a current transducer, a signal conversion circuit, a second-order filter circuit and an analog to digital conversion circuit; a watchdog circuit is connected with the analog to digital conversion circuit and the CPU; the switching signals of the alternating wires are connected to the CPU through a photoelectric isolated circuit (input parts) and an address latch unit; the switching signal output terminal of the CPU and the output terminal of a phase-lacking testing circuit are connected with a fault-output circuit through the photoelectric isolated circuit (output parts); the CPU is connected with the direct current monitoring system through a 485 communicating interface. The utility model can increase voltage and current to the alternating current system and realize the integral management and monitoring to the working state based on the present microcomputer monitoring device for the direct current system and has a strong remote control function.
Description
Technical field
The utility model relates to the supervising device of power of alterating and direct current in a kind of electric power system, particularly a kind of power of alterating and direct current micro computer monitoring integrated apparatus.
Background technology
The power plant of present China various places; hydroelectric station and all kinds of transformer station (institute); its employed alterating and direct current source device (is comprised that supplying with circuit-breaker switching on-off uses; the instrument and meter of backup battery charging and secondary circuit; open circuit protection, all kinds of low-voltage equipments such as control emergency light optical illumination) requirement of automation control comes height more.In present existing supervising device, monitoring technique to direct current system is comparatively ripe, but monitoring for AC system, also there are a lot of blank in prior art, can only realize that at most the local duplicate supply that passes through relay control switches, and be difficult to realize Long-distance Control and maintenance well, unattended operation is restricted.
Summary of the invention
The utility model relates to technical problem to be solved, a kind of power of alterating and direct current micro computer monitoring integrated apparatus is provided, make it can be on the microprocessor-based monitoring device basis of existing direct current system, increase realizes centralized management and monitoring to voltage, electric current and the operating state of AC system, and has stronger remote control function.
The control circuit of the utility model power of alterating and direct current micro computer monitoring integrated apparatus by dc monitoring system with exchange supervisory control system and form, described interchange supervisory control system is connected with the of ac signal of alternating current circuit with signaling conversion circuit by current transducer, and the of ac signal comprises bus current, busbar voltage, main power voltage and backup power source voltage signal; Current transducer and signaling conversion circuit are connected to analog to digital conversion circuit through second-order filter circuit respectively, and the output of analog to digital conversion circuit is connected with central processing unit (CPU); Also have one to adopt the watchdog circuit of X5045 chip to be connected with CPU to prevent the CPU program fleet with analog to digital conversion circuit; Whole interchange supervisory control system also is connected with the switching value signal of alternating current circuit by a photoelectric isolating circuit (importation), and the output of photoelectric isolating circuit (importation) is connected among the CPU through an address latch; The switching value signal output part of CPU is connected with the fault digital output circuit through a photoelectric isolating circuit (output); Also have a lack detection circuit, its input connects with the signaling conversion circuit that is connected main power source and stand-by power supply of ac signal, and its output also passes through photoelectric isolating circuit (output) and is connected with the fault digital output circuit; LCD MODULE and the keyboard input module in addition that are connected with CPU; CPU is connected with kilowatt-hour meter by one 485 communication interface; Whole interchange supervisory control system also is connected with dc monitoring system by another 485 communication interface that is connected with CPU.
The utility model is put on the basis at original dc monitoring system, also can realize centralized management and monitoring to voltage, electric current and the operating state of AC system, can bear tasks such as control, operation, communication, detection, record and warning to the alterating and direct current source device, reliability height, automaticity height, easy to use, have very strong plasticity.Particularly it can realize switching of duplicate supply intelligence and warning at AC system, and the equipment that makes can be applied to electrical network inclement condition area reliably.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model power of alterating and direct current micro computer monitoring integrated apparatus;
Fig. 2 is the circuit diagram of signaling conversion circuit among the utility model embodiment;
Fig. 3 is the circuit diagram of active filter circuit in the second-order filter circuit among the utility model embodiment;
Fig. 4 is the circuit diagram of passive filter circuit in the second-order filter circuit among the utility model embodiment;
Fig. 5 is the circuit diagram of analog to digital conversion circuit among the utility model embodiment;
Fig. 6 is the circuit diagram of photoelectric isolating circuit among the utility model embodiment (importation);
Fig. 7 is the circuit diagram of address latch among the utility model embodiment;
Fig. 8 is the circuit diagram of central processing unit among the utility model embodiment (CPU);
Fig. 9 is the circuit diagram of lack detection circuit among the utility model embodiment;
Figure 10 is the circuit diagram of photoelectric isolating circuit among the utility model embodiment (output);
Figure 11 is the circuit diagram that fault is left part among the utility model embodiment;
Figure 12 is the circuit diagram of 485 interface circuits among the utility model embodiment.
Embodiment
As shown in Figure 1, the control circuit of power of alterating and direct current micro computer monitoring integrated apparatus by dc monitoring system with exchange supervisory control system and form, exchanging supervisory control system is connected with dc monitoring system by one 485 interface, and by realization background monitoring of the communication channel in the dc monitoring system and telecommunication, AC signal (comprising bus current, busbar voltage, main power voltage and backup power source voltage signal) is connected in the second-order filter circuit by current transducer and signaling conversion circuit, passes through analog to digital conversion circuit again and is connected with central processing unit (CPU).Adopt the watchdog circuit of X5045 chip to prevent the CPU program fleet by one.The switching value signal of alternating current circuit is connected among the CPU through a photoelectric isolating circuit (importation) and an address latch.The switching value signal of CPU output is connected with the fault digital output circuit through a photoelectric isolating circuit (output).A lack detection circuit is arranged, and its input connects with the signaling conversion circuit that is connected main power source and stand-by power supply of ac signal, and its output also passes through photoelectric isolating circuit (output) and is connected with the fault digital output circuit.Also have a LCD MODULE to be connected with CPU with a keyboard input module.CPU also is connected with kilowatt-hour meter by one 485 communication interface.
The circuit structure of the signaling conversion circuit of the utility model embodiment as shown in Figure 2, it has circuit structure identical 3 (only having provided 1 among the figure), obtains the of ac signal of busbar voltage, main power voltage and backup power source voltage respectively by instrument transformer.
The second-order filter circuit of the utility model embodiment includes power filter and passive filter circuit, wherein the circuit structure of active filter circuit as shown in Figure 3, it is except strobing, also signal can be amplified, it has circuit structure identical 10 (only having provided 1 among the figure), and they are output signal VI1～VI10 respectively; Passive filter circuit wherein as shown in Figure 4, behind second-order filter, output signal U a, Ia, Ub, Ib, Uc, Ic, U1a, U1c, U2a, U2c.
Analog to digital conversion circuit shown in Figure 5 is digital signal and outputs to CPU the analog signal conversion of second-order filter circuit output.
8 way switch amount signals of alternating current circuit output to address latch shown in Figure 7 through photoelectric isolating circuit (importation) shown in Figure 6, are read among the CPU again.
Shown in Figure 8 is the circuit of the central processing unit of the utility model embodiment, its major part is a cpu chip that model is W77E58PLCC, its P0 mouth is used for liquid crystal display, the P1 mouth is used to leave and the kilowatt-hour meter communication, the P2 mouth is used for liquid crystal control, and the P3 mouth is used for communication, Keyboard Control and AD control.
The circuit structure of the circuit of the utility model embodiment lack detection circuit as shown in Figure 9; it is the hardware detection loop that has utilized 393 voltage comparators; its reliability is higher; can directly send operation signal without CPU to open-phase protection relay; it has circuit structure identical 2 (only having provided 1 among the figure), respectively corresponding main power source and stand-by power supply.
By the two paths of signals of lack detection circuit output with all pass through photoelectric isolating circuit shown in Figure 10 (output) by the switching value signal of CPU output and output to fault digital output circuit shown in Figure 11.The fault digital output circuit is left (four tunnel circuit structure is identical, has only provided 1 the tunnel among the figure) by four tunnel independence relays, and two-way is used for active and standby power supply and switches, and two-way is used for active and standby abnormity of power supply warning in addition, and warning can be set by jumper switch.
The 485 communication interface circuit that are connected with CPU among the utility model embodiment as shown in figure 12, it has circuit structure identical 2 (only having provided 1 among the figure), is used for respectively being connected with dc monitoring system with kilowatt-hour meter.
Claims (2)
1, a kind of power of alterating and direct current micro computer monitoring integrated apparatus, its control circuit by dc monitoring system with exchange supervisory control system and form, it is characterized in that: described interchange supervisory control system is connected with the of ac signal of alternating current circuit with signaling conversion circuit by current transducer; Current transducer and signaling conversion circuit are connected to analog to digital conversion circuit through second-order filter circuit respectively, and the output of analog to digital conversion circuit is connected with central processing unit (CPU); Also have one to adopt the watchdog circuit of X5045 chip to be connected with CPU with analog to digital conversion circuit; Whole interchange supervisory control system also is connected with the switching value signal of alternating current circuit by a photoelectric isolating circuit (importation), and the output of photoelectric isolating circuit (importation) is connected among the CPU through an address latch; The switching value signal output part of CPU is connected with the fault digital output circuit through a photoelectric isolating circuit (output); Also have a lack detection circuit, its input connects with the signaling conversion circuit that is connected main power source and stand-by power supply of ac signal, and its output also passes through photoelectric isolating circuit (output) and is connected with the fault digital output circuit; Whole interchange supervisory control system is connected with dc monitoring system by 485 communication interfaces that are connected with CPU.
2, power of alterating and direct current micro computer monitoring integrated apparatus according to claim 1 is characterized in that: LCD MODULE and the keyboard input module in addition that are connected with CPU; CPU also is connected with kilowatt-hour meter by one 485 communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221444 CN2634712Y (en) | 2003-04-25 | 2003-04-25 | AC/DC power supply microcomputer monitornig integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221444 CN2634712Y (en) | 2003-04-25 | 2003-04-25 | AC/DC power supply microcomputer monitornig integrated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2634712Y true CN2634712Y (en) | 2004-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03221444 Expired - Fee Related CN2634712Y (en) | 2003-04-25 | 2003-04-25 | AC/DC power supply microcomputer monitornig integrated device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2634712Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337912A (en) * | 2013-07-22 | 2013-10-02 | 国家电网公司 | Master monitoring device of AC/DC (Alternating Current/Direct Current) integration power supply |
-
2003
- 2003-04-25 CN CN 03221444 patent/CN2634712Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337912A (en) * | 2013-07-22 | 2013-10-02 | 国家电网公司 | Master monitoring device of AC/DC (Alternating Current/Direct Current) integration power supply |
| CN103337912B (en) * | 2013-07-22 | 2015-07-01 | 国家电网公司 | Master monitoring device of AC/DC (Alternating Current/Direct Current) integration power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040818 Termination date: 20100425 |