CN205067646U - Direct current system insulation monitoring and warning device - Google Patents
Direct current system insulation monitoring and warning device Download PDFInfo
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- CN205067646U CN205067646U CN201520751800.7U CN201520751800U CN205067646U CN 205067646 U CN205067646 U CN 205067646U CN 201520751800 U CN201520751800 U CN 201520751800U CN 205067646 U CN205067646 U CN 205067646U
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Abstract
The utility model relates to an electric power DC power supply monitoring devices field especially relates to a direct current system insulation monitoring and warning device who installs in the transformer substation. Include: the insulating monitoring electric bridge of system, electric bridge signal processing return circuit, a AD circuit, a CPU, monitor cell is scurried into in the interchange, the signal processing return circuit is scurried into in the interchange, the 2nd AD circuit, the 2nd CPU, monitor cell each other is scurried to the direct current, the signal processing return circuit each other is scurried to the direct current, the 3rd AD circuit, the 3rd CPU, battery return circuit monitor cell, battery monitoring signal processing return circuit, fourth AD circuit, fourth CPU, leak current transformer, leak the voltage/current signal processing circuit return circuit, the 5th AD circuit, the 5th CPU, the DSP unit, the display, keyboard and control circuit, alarm indicator, warning output contact, host computer communication interface, working power supply module. The device reduces the intensity of labour of maintainer, and labour saving and time saving improves work efficiency, service reliability's electric power enterprise economic benefit.
Description
Technical field
The utility model relates to DC power monitoring device field, particularly relates to a kind of Insulation Inspection Device for Direct-Current System being installed on transformer station.
Background technology
In electric system, DC power system is an earth-free power-supply system; mainly for the relay protection device of transformer station, automation equipment, communication apparatus, high-voltage switch gear operation provide working power; DC power system has occurred that earth fault can cause protective relaying maloperation and tripping; even power outage may be caused, so there is higher requirement in transformer station to DC power system insulating monitoring time serious.Cause DC power system to insulate to decline; occur that the type of earth fault is a lot; there is the ground connection that protective device fault causes; the ground connection that cable failure causes; the ground connection that equipment is intake and caused, exchange the ground connection of scurrying into direct current and causing, the direct current of different electrical power alters the ground connection of causing mutually; the ground connection etc. that battery pack leakage causes, causes DC system earth fault to be likely also the phenomenon such as multipoint earthing, high resistance grounding simultaneously.Due to the wide variety of DC system grounding, phenomenon is assorted, DC power system distribution is wide, duplexure is many, earthing searching location is difficult.So DC power system grounding monitoring device all cannot meet the requirement of the actual safe operation of transformer station completely.
Summary of the invention
A kind of Insulation Inspection Device for Direct-Current System, it is characterized in that including: system insulation monitoring electric bridge, bridge signal treatment loop, one A/D circuit, one CPU, monitoring means is scurried in interchange, signal conditioning circuit is scurried in interchange, 2nd A/D circuit, 2nd CPU, direct current alters monitoring means mutually, direct current alters signal conditioning circuit mutually, 3rd A/D circuit, 3rd CPU, accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, 4th A/D circuit, 4th CPU, leakage current transformer, leakage current signal conditioning circuit, 5th A/D circuit, 5th CPU, DSP unit, display, keyboard and control circuit, alarm lamp, warning output contact, communication interface with pc, working power module, system insulation monitoring electric bridge connects with bridge signal treatment loop, bridge signal treatment loop connects with an A/D circuit, one A/D circuit connects with a CPU, interchange is scurried into monitoring means with exchanging and is scurried into signal conditioning circuit and connect, interchange is scurried into signal conditioning circuit and is connected with the 2nd A/D circuit, 2nd A/D circuit connects with the 2nd CPU, direct current is altered monitoring means mutually and is altered signal conditioning circuit mutually with direct current and connect, direct current is altered signal conditioning circuit mutually and is connected with the 3rd A/D circuit, 3rd A/D circuit connects with the 3rd CPU, accumulator loop monitoring means connects with accumulator monitoring signal conditioning circuit, accumulator monitoring signal conditioning circuit connects with the 4th A/D circuit, 4th A/D circuit connects with the 4th CPU, leakage current transformer connects with leakage current signal conditioning circuit, leakage current signal conditioning circuit connects with the 5th A/D circuit, 5th A/D circuit connects with the 5th CPU, the output information of each CPU all and receive DSP unit input end, DSP unit exports and connects with display, DSP unit exports and connects with control circuit with keyboard, DSP unit exports and connects with alarm lamp, DSP unit exports and connects with warning output contact, DSP unit exports and connects with communication interface with pc, the power supply that working power module generator runs, system insulation monitoring electric bridge sends monitoring insulating signal to bridge signal treatment loop, the monitoring insulating signal collected is carried out calculation process by bridge signal treatment loop, convert 0-5V simulating signal to, flowing to an A/D the regulation of electrical circuit is that digital signal flows to a CPU again, and a CPU flows to DSP unit each signal, interchange is scurried into monitoring means monitoring interchange and is scurried into signal and send interchange to and scurry into signal conditioning circuit, exchange and scurry into signal conditioning circuit and signal is scurried in the interchange collected carry out calculation process, convert 0-5V simulating signal to, flowing to the 2nd A/D the regulation of electrical circuit is that digital signal flows to the 2nd CPU again, and the 2nd CPU flows to DSP unit each signal, direct current is altered monitoring means monitoring direct current mutually and is altered electric signal mutually and send direct current to and alter signal conditioning circuit mutually, direct current is altered signal conditioning circuit mutually and the direct current collected is altered electric signal is mutually carried out calculation process, convert 0-5V simulating signal to, flowing to the 3rd A/D the regulation of electrical circuit is that digital signal flows to the 3rd CPU again, and the 3rd CPU flows to DSP unit each signal, accumulator loop monitoring means monitoring battery pack insulating signal sends accumulator monitoring signal conditioning circuit to, the electric battery insulating signal collected is carried out calculation process by accumulator monitoring signal conditioning circuit, convert 0-5V simulating signal to, flowing to the 4th A/D the regulation of electrical circuit is that digital signal flows to the 4th CPU again, and the 4th CPU flows to DSP unit each signal, leakage current transformer induction leakage current signal sends leakage current signal conditioning circuit to, the leakage current signal of collection is carried out calculation process by electric leakage signal treatment loop, convert 0-5V simulating signal to, flowing to the 5th A/D the regulation of electrical circuit is that digital signal flows to the 5th CPU again, 5th CPU flows to DSP unit each signal, leakage current transformer is installed on each branch feeder of direct supply, and leakage current transformer quantity is determined by each point of feeder line quantity of DC power system, DSP unit receives the signal that each CPU sends over and carries out FFT high-speed computation, calculates actual bus insulation resistance, positive voltage-to-ground, negative voltage-to-ground, positive resistance to earth, negative resistance to earth, bus voltage value, interchange scurry into value, direct current and alter resistance value, storage battery insulating value, each loop leakage current value mutually, the signal that DSP unit is arrived by measuring and calculation, keyboard will set correlation values by the different requirement of user from control circuit, DSP unit inspection to numerical value and original setting value compare, the insulation of display display simultaneously information, interchange are scurried into information, direct current and are altered telecommunications breath, storage battery insulating information, leakage current information mutually, carry out warning simultaneously export by alarm lamp to the information of exception, and DSP unit is connected to communication interface with pc and data is uploaded by upper computer software, DSP unit connects warning output contact, and during warning, output contact closes, the 220V Power convert of DC power system becomes the voltages such as SV, 12V to be supplied to each element circuit by working power module, guarantees that each circuit normally works.
DC power system state of insulation scurries into monitoring means measurement by the fault that system insulation monitors bridge measurement, DC current is scurried in interchange by exchanging, transformer station alters monitoring means measurement by altering mutually of multiple different direct supply initiation mutually by direct current, the earth fault of accumulator initiation is measured by accumulator loop monitoring means, branch insulation is bad or earth fault is measured by each branch road leakage current transformer; The signal of each measurement is delivered to respective CPU and is carried out calculation process after the process of measurement of correlation treatment loop after A/D circuit conversion, adopt fft algorithm to each sampled value computing, deliver to the state that DSP unit judges each branch road again, make the various ground connection information of whole direct supply insulating monitoring state and each several part grounding fault carry out unified measurement.There is clear, clear, effectively to improve whole insulation monitoring and warning device Contents for Monitoring.
Described a kind of Insulation Inspection Device for Direct-Current System, be further characterized in that: bound cell formula structure, by system insulation monitoring board, exchange and scurry into that monitoring board, direct current alter monitoring board mutually, storage battery insulating monitoring board, loop leakage current monitoring plate, DSP unit mainboard, device display board, communication alarming plate are formed; System insulation monitoring board comprises: system insulation monitoring electric bridge, bridge signal treatment loop, an A/D circuit, a CPU tetra-assembly of elements; Interchange is scurried into monitoring board and is comprised: exchange and scurry into monitoring means, exchange and scurry into signal conditioning circuit, the 2nd A/D circuit, the 2nd CPU tetra-assembly of elements; Direct current is altered monitoring board mutually and is comprised: direct current is altered monitoring means, direct current mutually and altered signal conditioning circuit, the 3rd A/D circuit, the 3rd CPU tetra-assembly of elements mutually; Storage battery insulating monitoring board comprises: accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, the 4th A/D circuit, the 4th CPU tetra-assembly of elements; Loop leakage current monitoring plate comprises: leakage current signal conditioning circuit, the 5th A/D circuit, the 5th CPU tri-assembly of elements; Leakage current transformer is installed on each duplexure of each DC power supply panel, and leakage current transformer exports and connects with leakage current signal processing circuit; DSP unit mainboard comprises: DSP unit, working power module two assembly of elements; Display board comprises: display, keyboard and control circuit, alarm lamp three cell mesh; Communication alarming plate comprises: warning output contact, communication interface with pc two assembly of elements.
The structure of this bound cell formula, greatly facilitates maintenance, improves the reliability of device, can not access this function wiring board for the unwanted function of occasion; Such as: the transformer station only having one group of DC power system, just do not need monitoring direct current to alter function mutually, just do not need to insert direct current yet and alter monitoring board mutually, and do not affect the normal use of device;
The effect that the present invention is useful is.
The process of sampling multi-unit message, simultaneously to DC system grounding, interchange is scurried into, direct current is altered all kinds mutually and measured comprehensively, has the advantages that metrical information amount is large, accuracy is high.
Relevant all parameters are all arranged by menu, and relevant All Alerts is all exported by acousto-optic, and corresponding dry contact exports and communication data exports, and meets the needs of different occasion.
Bound cell formula structural design, easy to maintenance, upgrade convenient, each function does not influence each other, and standalone feature is powerful.
Accompanying drawing explanation
Fig. 1. the utility model schematic block circuit diagram.
Fig. 2. the utility model general structure schematic diagram.
Embodiment
Embodiment one: as shown in Figure 1, the theory diagram of the utility model device, a kind of Insulation Inspection Device for Direct-Current System, is characterized in that including: system insulation monitoring electric bridge (1), bridge signal treatment loop (2), one A/D circuit (3), one CPU (4), monitoring means (5) is scurried in interchange, signal conditioning circuit (6) is scurried in interchange, 2nd A/D circuit (7), 2nd CPU (8), direct current alters monitoring means (9) mutually, direct current alters signal conditioning circuit (10) mutually, 3rd A/D circuit (11), 3rd CPU (12), accumulator loop monitoring means (13), accumulator monitoring signal conditioning circuit (14), 4th A/D circuit (15), 4th CPU (16), leakage current transformer (17), leakage current signal conditioning circuit (18), 5th A/D circuit (19), 5th CPU (20), DSP unit (21), display (22), keyboard and control circuit (23), alarm lamp (24), warning output contact (25), communication interface with pc (26), working power module (27), system insulation monitoring electric bridge (1) connects with bridge signal treatment loop (2), bridge signal treatment loop (2) connects with an A/D circuit (3), one A/D circuit (3) connects with a CPU (4), interchange is scurried into monitoring means (5) with exchanging and is scurried into signal conditioning circuit (6) and connect, interchange is scurried into signal conditioning circuit (6) and is connected with the 2nd A/D circuit (7), 2nd A/D circuit (7) connects with the 2nd CPU (8), direct current is altered monitoring means (9) mutually and is altered signal conditioning circuit (10) mutually with direct current and connect, direct current is altered signal conditioning circuit (10) mutually and is connected with the 3rd A/D circuit (11), 3rd A/D circuit (11) connects with the 3rd CPU (12), accumulator loop monitoring means (13) connects with accumulator monitoring signal conditioning circuit (14), accumulator monitoring signal conditioning circuit (14) connects with the 4th A/D circuit (15), 4th A/D circuit (15) connects with the 4th CPU (16), leakage current transformer (17) connects with leakage current signal conditioning circuit (18), leakage current signal conditioning circuit (18) connects with the 5th A/D circuit (19), 5th A/D circuit (19) connects with the 5th CPU (20), the output information of each CPU all and receive DSP unit (21) input end, DSP unit (21) exports and connects with display (22), DSP unit (21) exports and connects with control circuit (23) with keyboard, DSP unit (21) exports and connects with alarm lamp (24), DSP unit (21) exports and connects with warning output contact (25), DSP unit (21) exports and connects with communication interface with pc (26), the power supply that working power module (27) generator runs, system insulation monitoring electric bridge (1) sends monitoring insulating signal to bridge signal treatment loop (2), the monitoring insulating signal collected is carried out calculation process by bridge signal treatment loop (2), convert 0-5V simulating signal to, flow to an A/D circuit (3) to be adjusted to digital signal and to flow to a CPU (4) again, a CPU (4) flows to DSP unit (21) each signal, interchange is scurried into monitoring means (5) monitoring interchange and is scurried into signal and send interchange to and scurry into signal conditioning circuit (6), interchange is scurried into signal conditioning circuit (6) and signal is scurried in the interchange collected is carried out calculation process, convert 0-5V simulating signal to, flow to the 2nd A/D circuit (7) to be adjusted to digital signal and to flow to the 2nd CPU (8) again, the 2nd CPU (8) flows to DSP unit (21) each signal, direct current is altered monitoring means (9) monitoring direct current mutually and is altered electric signal mutually and send direct current to and alter signal conditioning circuit (10) mutually, direct current is altered signal conditioning circuit (10) mutually and the direct current collected is altered electric signal is mutually carried out calculation process, convert 0-5V simulating signal to, flow to the 3rd A/D circuit (11) to be adjusted to digital signal and to flow to the 3rd CPU (12) again, the 3rd CPU (12) flows to DSP unit (21) each signal, accumulator loop monitoring means (13) monitoring battery pack insulating signal sends accumulator monitoring signal conditioning circuit (14) to, the electric battery insulating signal collected is carried out calculation process by accumulator monitoring signal conditioning circuit (14), convert 0-5V simulating signal to, flow to the 4th A/D circuit (15) to be adjusted to digital signal and to flow to the 4th CPU (16) again, the 4th CPU (16) flows to DSP unit (21) each signal, leakage current transformer (17) senses that the leakage current signal of each duplexure sends leakage current signal conditioning circuit (18) to, the each leakage current signal gathered is carried out calculation process by leakage current signal conditioning circuit (18), convert 0-5V simulating signal to, flow to the 5th A/D circuit (19) to be adjusted to digital signal and to flow to the 5th CPU (20) again, 5th CPU (20) flows to DSP unit (21) each signal, leakage current transformer (17) is installed on each branch feeder of direct supply, leakage current transformer (17) quantity is determined by each point of feeder line quantity of DC power system, DSP unit (21) receives the signal that each CPU sends over and carries out FFT high-speed computation, calculates actual bus insulation resistance, positive voltage-to-ground, negative voltage-to-ground, positive resistance to earth, negative resistance to earth, bus voltage value, interchange scurry into value, direct current and alter resistance value, storage battery insulating value, each loop leakage current value mutually, the signal that DSP unit (21) is arrived by measuring and calculation, keyboard will set correlation values by the different requirement of user from control circuit (23), the numerical value that DSP unit (21) detects and original setting value compare, the insulation of display (22) display simultaneously information, interchange are scurried into information, direct current and are altered telecommunications breath, storage battery insulating information, leakage current information mutually, carry out warning simultaneously export by alarm lamp (24) to the information of exception, and DSP unit (21) is connected to communication interface with pc (26) and data is uploaded by upper computer software, DSP unit (21) connects warning output contact (25), and during warning, output contact (25) closes, the 220V Power convert of DC power system becomes the voltages such as 5V, 12V to be supplied to each element circuit by working power module (27), guarantees that each circuit normally works.
By system insulation, DC power system state of insulation monitors that electric bridge (1) is measured, exchanged by interchange, the fault of scurrying into DC current scurries into that monitoring means (5) is measured, transformer station to be altered by direct current mutually by altering mutually of causing of multiple different direct supply that the earth fault that monitoring means (9) is measured, accumulator causes is measured by accumulator loop monitoring means (13), branch insulation is bad or earth fault is measured by each branch road leakage current transformer (17); The signal of each measurement is delivered to respective CPU and is carried out calculation process employing fft algorithm to each sampled value computing after the process of measurement of correlation treatment loop after A/D circuit conversion, deliver to the state that DSP unit (21) judges each branch road again, make the various ground connection information of whole direct supply insulating monitoring state and each several part grounding fault carry out unified measurement.There is clear, clear, effectively to improve whole insulation monitoring and warning device Contents for Monitoring.
Embodiment two: as shown in Figure 2, described a kind of Insulation Inspection Device for Direct-Current System, be further characterized in that: bound cell formula structure, by system insulation monitoring board (28), monitoring board (29) is scurried in interchange, direct current alters monitoring board (30) mutually, storage battery insulating monitoring board (31), loop leakage current monitoring plate (32), DSP mainboard (33), device display board (34), communication alarming plate (35) are formed; System insulation monitoring board (28) comprising: system insulation monitoring electric bridge (1), bridge signal treatment loop (2), an A/D circuit (3), a CPU (4) four assembly of elements; Interchange is scurried into monitoring board (29) and being comprised: exchange and scurry into monitoring means (5), exchange and scurry into signal conditioning circuit (6), the 2nd A/D circuit (7), the 2nd CPU (8) four assembly of elements; Direct current is altered monitoring board (30) mutually and being comprised: direct current alters monitoring means (9) mutually, direct current alters signal conditioning circuit (10) mutually, the 3rd A/D circuit (11), the 3rd CPU (12) four assembly of elements; Storage battery insulating monitoring board (31) comprising: four assembly of elements such as accumulator loop monitoring means (13), accumulator monitoring signal conditioning circuit (14), the 4th A/D circuit (15), the 4th CPU (16); Loop leakage current monitoring plate (32) comprising: leakage current signal conditioning circuit (18), the 5th A/D circuit (19), the 5th CPU (20) three assembly of elements; Leakage current transformer (17) is installed on each duplexure of each DC power supply panel, and the output signal of leakage current transformer receives leakage current signal processing circuit; DSP mainboard (33) comprising: DSP unit (21), working power module (27) two assembly of elements; Device display board (34) comprising: display (22), keyboard and control circuit (23), alarm lamp (24) three cell mesh; Communication alarming plate (35) comprising: warning output contact (25), communication interface with pc (26) two assembly of elements.
The structure of this bound cell formula, greatly facilitates maintenance, improves the reliability of device, can not access this function wiring board for the unwanted function of occasion; Such as: the transformer station only having one group of DC power system, just do not need monitoring direct current to alter function mutually, just do not need to insert direct current yet and alter monitoring board (30) mutually, and do not affect the normal use of device.
System insulation monitoring board (28) comprising:
System insulation monitoring electric bridge (1), bridge signal treatment loop (2), an A/D circuit (3), a CPU (4) four assembly of elements, make a circuit board being with card i/f and DSP mainboard to plug; System insulation monitoring electric bridge (1), the mode adopting balanced bridge to be combined with unbalanced bridge monitors bus insulation signal, adopt branched high-power, precision resister to form divider bridge over the ground, measure the parameters such as DC bus-bar voltage, negative voltage-to-ground, positive voltage-to-ground, positive resistance to earth value, negative resistance to earth value; Bridge signal treatment loop (2), gather bridge signal, system insulation is monitored the numerical value that electric bridge (1) measures and carry out calculation process, the voltage signal making the magnitude of voltage of output be converted to 0-5V is given an A/D circuit (3) and is converted to digital signal and calculates the parameters such as DC bus-bar voltage, negative voltage-to-ground, positive voltage-to-ground, positive resistance to earth value, negative resistance to earth value to a CPU (4).
Interchange is scurried into monitoring board (29) and being comprised:
Interchange is scurried into monitoring means (5), is exchanged and scurry into signal conditioning circuit (6), the 2nd A/D circuit (7), the 2nd CPU (8) four assembly of elements, make a circuit board being with card i/f and DSP mainboard to plug, interface homologous ray insulating monitoring plate (28); Interchange is scurried into monitoring means (5) and is real-time monitored ac voltage signal in DC power system, and signal is scurried in real-time trace information treatment technology monitoring interchange; Measuring method exchanges shelves measurement direct supply with employing multimeter consistent, ac voltage signal is delivered to interchange to scurry into signal conditioning circuit (6) and make output voltage values be the d. c. voltage signal of 0-5V, give the 2nd A/D circuit (7) and be converted to digital signal, the 2nd CPU (8) is allowed to process, realize exchanging in real time scurrying into monitoring, once direct supply has occurred that interchange is scurried into D. C. power source breakdown and will be given DSP unit (21).
Direct current is altered monitoring board (30) mutually and being comprised:
Direct current alters monitoring means (9) mutually, direct current alters signal conditioning circuit (10) mutually, the 3rd A/D circuit (11), the 3rd CPU (12) four assembly of elements, make the circuit board being with card i/f and DSP mainboard to plug, interface is identical with above-mentioned plate; Direct current is altered monitoring means (9) mutually and is adopted quick high accuracy testing circuit, and the direct current between real-time Test Field two sections of buses alters signal mutually; Direct current is altered signal conditioning circuit (10) mutually and is gathered direct current and alter direct current that monitoring means (9) monitors mutually and alter signal mutually and carry out calculation process, the magnitude of voltage of output is made to be the d. c. voltage signal of 0-5V, give the 3rd A/D circuit (11) and convert digital signal to, allow the 3rd CPU (12) process, realize real-time direct current and alter monitoring mutually.
Storage battery insulating monitoring board (31) comprising:
Accumulator loop monitoring means (13), accumulator monitoring signal conditioning circuit (14), the 4th A/D circuit (15), the 4th CPU (16) four unit portions, part makes the circuit board being with card i/f and DSP mainboard to plug, and interface is identical with above-mentioned plate; Accumulator loop monitoring means (13) adopts high impedance electric bridge to carry out automatic or manual monitoring battery pack insulating signal; The battery pack insulating signal that accumulator monitoring signal conditioning circuit (14) collection accumulator loop monitoring means (13) monitors carries out calculation process, the magnitude of voltage of output is made to be the d. c. voltage signal of 0-5V, give the 4th A/D circuit (15) and change into digital signal, allow the 4th CPU (16) process, realize real-time storage battery insulating monitoring.
Loop leakage current monitoring plate (32) comprising:
Leakage current signal conditioning circuit (18), the 5th A/D circuit (19), the 5th CPU (20) three assembly of elements, make the circuit board being with card i/f and DSP mainboard to plug, interface is identical with above-mentioned plate; Leakage current transformer (17) is installed on each branch route of each direct current fluid layer, micro-for tested interchange electric current, DC-isolation is converted to standard analog signal or the RS485 digital signal such as DC current, DC voltage of linear scaling; The current signal that leakage current signal conditioning circuit (18) collection leakage current transformer (17) senses carries out calculation process, the magnitude of voltage of output is made to be the d. c. voltage signal of 0-5V, give the 5th A/D circuit (19) and convert digital signal to, allow the 5th CPU (20) process, realize real-time Current Mutual Inductance monitoring.
DSP mainboard (33) comprising:
DSP unit (21), working power module (27) two assembly of elements, make band card i/f circuit board and connect with above-mentioned circuit board; To five CPU, (signal brought processes DSP unit (21), is carried out measuring or filtering by continuous analog signal; Working power module (27) adopts power semiconductor device as on-off element, and by periodicity on-off switch, the duty of gauge tap element adjusts output voltage.
Device display board (34) comprising:
Display (22), keyboard and control circuit (23), alarm lamp (24) three cell mesh, make a circuit board, plate set up a socket part connect with DSP mainboard (33); Display (22) display unit is shown as Chinese symbol under the software of DSP unit (21), and adopt the LCDs of 3.5 cun, resolution is not less than 320*240; A kind of instruction and data input media that keyboard and control circuit (23) operating equipment run, setting required current amplitude, device minimum voltage value, alarming value, and the setting of upper machine communication baud rate; Alarm lamp (24) and keyboard are located on the panel of device.
Communication alarming plate (35) comprising:
Warning output contact (25), communication interface with pc (26) two unit pieces make the back side that a wiring board is installed on instrument, and connection terminal for subsequent use connects with outside, warning output contact (25) is made up of several dry contacts, provides the dry contact of instrument external alert output relay, communication interface with pc (26) adopts modular Software for Design, connect DSP unit (21), various stipulations module and other functional modules can be increased very easily, communication interface with pc (26) internally can provide various communication interfaces: Ethernet (10/100Base-TX, 100Base-FX), serial ports (RS-232/485/422) and other field-bus interface, multiple stipulations (IEC60870-5-103 etc.) can be run on these interfaces simultaneously, communication interface with pc (26) externally can provide multiple Ethernet (10/100Base-TX, 100Base-FX), numeral RS-232 and analog channel interface, various protocols (60870-5-101 can be suitable for simultaneously, IEC60870-5-104, DNP3.0 etc.).
A/D circuit:
The simulating signal of various information is changed by the one A/D circuit (3), the 2nd A/D circuit (7), the 3rd A/D circuit (11), the 4th A/D circuit (15), the 5th A/D circuit (19), convert digital signal to, the main devices model of five A/D conversion electrical equipment is that TIADS1230PW is provided by ADI or BB company, be 16 A/D converters, ensure that the precision of measurement and DSP unit (21) have good compatibility.
CPU：
One CPU (4), the 2nd CPU (8), the 3rd CPU (12), the 4th CPU (16), the 5th CPU (20) adopt 32 bit CPU chip model MS430, realize the calculation process of digital signal rapidly, have employed instruction pipeline execution architecture and corresponding parallel processing structure, in one-period, arithmetical operation at a high speed and logical operation can be carried out to data.
Claims (2)
1. an Insulation Inspection Device for Direct-Current System, it is characterized in that including: system insulation monitoring electric bridge, bridge signal treatment loop, one A/D circuit, one CPU, monitoring means is scurried in interchange, signal conditioning circuit is scurried in interchange, 2nd A/D circuit, 2nd CPU, direct current alters monitoring means mutually, direct current alters signal conditioning circuit mutually, 3rd A/D circuit, 3rd CPU, accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, 4th A/D circuit, 4th CPU, leakage current transformer, leakage current signal conditioning circuit, 5th A/D circuit, 5th CPU, DSP unit, display, keyboard and control circuit, alarm lamp, warning output contact, communication interface with pc, working power module, system insulation monitoring electric bridge connects with bridge signal treatment loop, bridge signal treatment loop connects with an A/D circuit, one A/D circuit connects with a CPU, interchange is scurried into monitoring means with exchanging and is scurried into signal conditioning circuit and connect, interchange is scurried into signal conditioning circuit and is connected with the 2nd A/D circuit, 2nd A/D circuit connects with the 2nd CPU, direct current is altered monitoring means mutually and is altered signal conditioning circuit mutually with direct current and connect, direct current is altered signal conditioning circuit mutually and is connected with the 3rd A/D circuit, 3rd A/D circuit connects with the 3rd CPU, accumulator loop monitoring means connects with accumulator monitoring signal conditioning circuit, accumulator monitoring signal conditioning circuit connects with the 4th A/D circuit, 4th A/D circuit connects with the 4th CPU, leakage current transformer connects with leakage current signal conditioning circuit, leakage current signal conditioning circuit connects with the 5th A/D circuit, 5th A/D circuit connects with the 5th CPU, the output information of each CPU all and receive DSP unit input end, DSP unit exports and connects with display, DSP unit exports and connects with control circuit with keyboard, DSP unit exports and connects with alarm lamp, DSP unit exports and connects with warning output contact, DSP unit exports and connects with communication interface with pc.
2. a kind of Insulation Inspection Device for Direct-Current System according to claim 1, be further characterized in that: bound cell formula structure, by system insulation monitoring board, exchange and scurry into that monitoring board, direct current alter monitoring board mutually, storage battery insulating monitoring board, loop leakage current monitoring plate, DSP unit mainboard, device display board, communication alarming plate are formed; System insulation monitoring board comprises: system insulation monitoring electric bridge bridge signal treatment loop, an A/D circuit, a CPU tetra-assembly of elements; Interchange is scurried into monitoring board and is comprised: exchange and scurry into monitoring means, exchange and scurry into signal conditioning circuit, the 2nd A/D circuit, the 2nd CPU tetra-assembly of elements; Direct current is altered monitoring board mutually and is comprised: direct current is altered monitoring means, direct current mutually and altered signal conditioning circuit, the 3rd A/D circuit, the 3rd CPU tetra-assembly of elements mutually; Storage battery insulating monitoring board comprises: accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, the 4th A/D circuit, the 4th CPU tetra-assembly of elements; Loop leakage current monitoring plate comprises: leakage current signal conditioning circuit, the 5th A/D circuit, the 5th CPU tri-assembly of elements; Leakage current transformer is installed on each duplexure of each DC power supply panel; DSP unit mainboard comprises: DSP unit, working power module two assembly of elements; Display board comprises: display, keyboard and control circuit, alarm lamp three cell mesh; Communication alarming plate comprises: warning output contact, communication interface with pc two assembly of elements.
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| CN201520751800.7U CN205067646U (en) | 2015-09-25 | 2015-09-25 | Direct current system insulation monitoring and warning device |
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| CN201520751800.7U CN205067646U (en) | 2015-09-25 | 2015-09-25 | Direct current system insulation monitoring and warning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556778A (en) * | 2015-09-25 | 2017-04-05 | 浙江科畅电子有限公司 | A kind of Insulation Inspection Device for Direct-Current System |
| CN111983322A (en) * | 2020-08-24 | 2020-11-24 | 天津铁路信号有限责任公司 | Subway power screen output circuit insulation resistance monitoring circuit with switching function |
-
2015
- 2015-09-25 CN CN201520751800.7U patent/CN205067646U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556778A (en) * | 2015-09-25 | 2017-04-05 | 浙江科畅电子有限公司 | A kind of Insulation Inspection Device for Direct-Current System |
| CN111983322A (en) * | 2020-08-24 | 2020-11-24 | 天津铁路信号有限责任公司 | Subway power screen output circuit insulation resistance monitoring circuit with switching function |
| CN111983322B (en) * | 2020-08-24 | 2023-07-04 | 天津铁路信号有限责任公司 | Metro power supply screen output loop insulation resistance monitoring circuit with switching function |
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