CN106556778A - A kind of Insulation Inspection Device for Direct-Current System - Google Patents
A kind of Insulation Inspection Device for Direct-Current System Download PDFInfo
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Abstract
The present invention relates to DC power monitoring device field, is more particularly to installed on a kind of Insulation Inspection Device for Direct-Current System of transformer station.It is characterized in that including：System insulation monitors electric bridge, bridge signal treatment loop, A/D circuits 1, CPU1, monitoring means are scurried in exchange, exchange ingress signal treatment loop, A/D circuits 2, CPU2, direct current mutually alters monitoring means, direct current mutually alters signal conditioning circuit, A/D circuits 3, CPU3, accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, A/D circuits 4, CPU4, leakage current transformer, leakage current signal conditioning circuit, A/D circuits 5, CPU5, DSP unit, display, keyboard and control circuit, alarm lamp, warning output contact, communication interface with pc, working power module etc..The device is used for transforming plant DC power supply monitoring, it is possible to achieve equipment quick lookup in case of a failure.Reduce the labor intensity of maintainer, it is time saving and energy saving, improve work efficiency, power supply reliability and electric power enterprise economic benefit.
Description
Technical field
Patent of the present invention is related to DC power monitoring device field, is more particularly to installed on a kind of Insulation Inspection Device for Direct-Current System of transformer station.
Background technology
In power system, DC power system is an earth-free power-supply system; be mainly the relay protection device of transformer station, automation equipment, communication apparatus, high-voltage switch gear operation working power is provided; DC power system occurs in that earth fault can cause protective relaying maloperation and tripping; power outage can possibly even be caused when serious, so there is higher requirement in transformer station to DC power system insulating monitoring.DC power system insulation is caused to decline; the type for earth fault occur is a lot; the ground connection for having protection device failure to cause; the ground connection that cable failure is caused; the ground connection that equipment is intake and caused, exchange scurry into the ground connection that direct current is caused, and the direct current of different electrical power mutually alters the ground connection caused; ground connection that accumulator battery leakage is caused etc., causes DC system earth fault while it is also possible that the phenomenon such as multipoint earthing, high resistance grounding.Due to the wide variety of DC system grounding, phenomenon is miscellaneous, DC power system distribution is wide, duplexure is more, earthing searching positioning hardly possible.So DC power system grounding monitoring device cannot all fully meet the requirement of the actual safe operation of transformer station.
The content of the invention
A kind of Insulation Inspection Device for Direct-Current System, it is characterised in that include：System insulation monitors electric bridge, bridge signal treatment loop, A/D circuits 1, CPU 1, monitoring means are scurried in exchange, exchange ingress signal treatment loop, A/D circuits 2, CPU 2, direct current mutually alters monitoring means, direct current mutually alters signal conditioning circuit, A/D circuits 3, CPU 3, accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, A/D circuits 4, CPU 4, leakage current transformer, leakage current signal conditioning circuit, A/D circuits 5, CPU 5, DSP unit, display, keyboard and control circuit, alarm lamp, warning output contact, communication interface with pc, working power module etc.；System insulation monitoring electric bridge is connected with bridge signal treatment loop；Bridge signal treatment loop is connected with A/D circuits 1；A/D circuits 1 are connected with CPU 1；Exchange is scurried into monitoring means and exchanges ingress signal treatment loop and connect；Exchange ingress signal treatment loop is connected with A/D circuits 2；A/D circuits 2 are connected with CPU 2；Direct current is mutually altered monitoring means and mutually alters signal conditioning circuit with direct current and connects；Direct current is mutually altered signal conditioning circuit and is connected with A/D circuits 3；A/D circuits 3 are connected with CPU 3；Accumulator loop monitoring means are connected with accumulator monitoring signal conditioning circuit；Accumulator monitoring signal conditioning circuit is connected with A/D circuits 4；A/D circuits 4 are connected with CPU 4；Leakage current transformer is connected with leakage current signal conditioning circuit；Leakage current signal conditioning circuit is connected with A/D circuits 5；A/D circuits 5 are connected with CPU 5；The output information of each CPU all and is connected to DSP unit input；DSP unit output is connected with display；DSP unit output is connected with keyboard with control circuit；DSP unit output is connected with alarm lamp；DSP unit output is connected with warning output contact；DSP unit output is connected with communication interface with pc；The power supply of working power module offer device operation；System insulation is monitored electric bridge and sends bridge signal treatment loop to by insulating signal is monitored, the monitoring insulating signal for collecting is carried out calculation process by bridge signal treatment loop, it is converted into 0-5V analogue signals, it is conveyed to A/D circuits 1 and is adjusted to digital signal and be conveyed to CPU 1 again, CPU 1 is conveyed to DSP unit each signal；Exchange is scurried into monitoring means monitoring exchange ingress signal and sends exchange ingress signal treatment loop to, the exchange ingress signal for collecting is carried out calculation process by exchange ingress signal treatment loop, it is converted into 0-5V analogue signals, it is conveyed to A/D circuits 2 and is adjusted to digital signal and be conveyed to CPU 2 again, CPU 2 is conveyed to DSP unit each signal；Direct current is mutually altered monitoring means monitoring direct current and mutually alters the signal of telecommunication and send direct current to and mutually alters signal conditioning circuit, direct current is mutually altered signal conditioning circuit the direct current for collecting mutually is altered the signal of telecommunication and carries out calculation process, it is converted into 0-5V analogue signals, it is conveyed to A/D circuits 3 and is adjusted to digital signal and be conveyed to CPU 3 again, CPU 3 is conveyed to DSP unit each signal；Accumulator loop monitoring means monitoring accumulator battery insulating signal sends accumulator monitoring signal conditioning circuit to, the set of cells insulating signal for collecting is carried out calculation process by accumulator monitoring signal conditioning circuit, it is converted into 0-5V analogue signals, it is conveyed to A/D circuits 4 and is adjusted to digital signal and be conveyed to CPU 4 again, CPU 4 is conveyed to DSP unit each signal；Leakage current transformer sensing 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, it is converted into 0-5V analogue signals, it is conveyed to A/D circuits 5 and is adjusted to digital signal and is conveyed to CPU 5 again, CPU 5 is conveyed to DSP unit each signal, leakage current transformer is installed on each branch feeder of DC source, 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 computations, calculates actual bus insulation resistance, positive voltage-to-ground, negative voltage-to-ground, positive resistance to earth, negative resistance to earth, bus voltage value, exchange and scurries into value, direct current and mutually alter resistance value, storage battery insulating value, each loop leakage current value；The signal that DSP unit is arrived by measuring and calculation, keyboard and control circuit will set correlation values by the different requirements of user, the numerical value that DSP unit is detected is compared with original setting value, display shows that insulation information, exchange are scurried into information, direct current and mutually alters electrical information, storage battery insulating information, leakage current information simultaneously, while carrying out warning output to abnormal information by alarm lamp；And DSP unit is connected to communication interface with pc and uploads data by upper computer software；DSP unit connects warning output contact, output contact closure during warning；The 220V Power converts of DC power system are supplied to each unit circuit into voltages such as 5V, 12V by working power module, it is ensured that each normal circuit operation.
DC power system state of insulation by system insulation monitor bridge measurement, exchange scurry into the failure of DC current scurries into monitoring means measurement by exchange, monitoring means measurement is mutually altered by direct current by mutually altering of causing of various different DC sources by transformer station, accumulator causes earth fault by the measurement of 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 after the process of measurement of correlation treatment loop is sent to respective CPU Jing after A/D circuit conversions and carries out calculation process, each sampled value calculating is processed using fft algorithm, the state that DSP unit judges each branch road is then sent through, makes the various ground connection informations of whole DC source insulating monitoring state and each several part grounding failure carry out unified measurement.With Contents for Monitoring that is clear, clear, effectively increasing whole insulation monitoring and warning device.
A kind of described Insulation Inspection Device for Direct-Current System, is further characterized in that：Bound cell formula structure, is scurried into monitoring board, direct current and mutually alters monitoring board, storage battery insulating monitoring board, loop leakage current monitoring plate, DSP unit mainboard, device display panel, communication alarming plate and constituted by system insulation monitoring board, exchange；System insulation monitoring board includes：Four assembly of elements such as system insulation monitoring electric bridge, bridge signal treatment loop, A/D circuits 1, CPU 1；Monitoring board is scurried in exchange to be included：Four assembly of elements such as monitoring means, exchange ingress signal treatment loop, A/D circuits 2, CPU 2 are scurried in exchange；Direct current mutually alters monitoring board to be included：Direct current is mutually altered monitoring means, direct current and mutually alters four assembly of elements such as signal conditioning circuit, A/D circuits 3, CPU 3；Storage battery insulating monitoring board includes：Four assembly of elements such as accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, A/D circuits 4, CPU 4；Loop leakage current monitoring plate includes：Three assembly of elements such as leakage current signal conditioning circuit, A/D circuits 5, CPU 5；Leakage current transformer
It is installed on each duplexure of each DC power supply panel, leakage current transformer output is connected with leakage current signal processing circuit；DSP unit mainboard includes：Two assembly of elements such as DSP unit, working power module；Display panel includes：Three cell mesh such as display, keyboard and control circuit, alarm lamp；Communication alarming plate includes：Two assembly of elements such as warning output contact, communication interface with pc.
The structure of this bound cell formula, greatly facilitates maintenance, improves the reliability of device, for the unwanted function of occasion can not access the function wiring board；For example：Only the transformer station of one group of DC power system, avoids the need for monitoring direct current and mutually alters function, also avoids the need for insertion direct current and mutually alters monitoring board, and does not affect the normal use of device；
Beneficial effect of the present invention is：.
Sampling multi-unit message is processed, while to DC system grounding, exchange is scurried into, direct current is mutually altered all kinds and measured comprehensively, with metrical information amount it is big, accuracy is high the characteristics of.
Related all parameters can be configured by menu, and related All Alerts are exported by acousto-optic, and corresponding dry contact is exported and communication data output, meets the needs of different occasions.
Bound cell formula structure design, easy to maintenance, upgrading are convenient, and each function does not influence each other, and standalone feature is powerful.
Description of the drawings
Fig. 1. patent schematic block circuit diagram of the present invention.
Fig. 2. patent general structure schematic diagram of the present invention.
Drawing reference numeral explanation
Embodiment one：As shown in figure 1, the theory diagram of Patent equipment of the present invention, a kind of Insulation Inspection Device for Direct-Current System, it is characterised in that include：System insulation monitors electric bridge（1）, bridge signal treatment loop（2）, A/D circuits 1（3）、CPU 1（4）, exchange scurry into monitoring means（5）, exchange ingress signal treatment loop（6）, A/D circuits 2（7）、CPU 2（8）, direct current mutually alter monitoring means（9）, direct current mutually alter signal conditioning circuit（10）, A/D circuits 3（11）、CPU 3（12）, accumulator loop monitoring means（13）, accumulator monitoring signal conditioning circuit（14）, A/D circuits 4（15）、CPU 4（16）, leakage current transformer（17）, leakage current signal conditioning circuit（18）, A/D circuits 5（19）、CPU 5（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）Deng；System insulation monitors electric bridge（1）With bridge signal treatment loop（2）Connect；Bridge signal treatment loop（2）With A/D circuits 1（3）Connect；A/D circuits 1（3）With CPU 1（4）Connect；Monitoring means are scurried in exchange（5）With exchange ingress signal treatment loop（6）Connect；Exchange ingress signal treatment loop（6）With A/D circuits 2（7）Connect；A/D circuits 2（7）With CPU 2（8）Connect；Direct current mutually alters monitoring means（9）Signal conditioning circuit is altered mutually with direct current（10）Connect；Direct current mutually alters signal conditioning circuit（10）With A/D circuits 3（11）Connect；A/D circuits 3（11）With CPU 3（12）Connect；Accumulator loop monitoring means（13）With accumulator monitoring signal conditioning circuit（14）Connect；Accumulator monitoring signal conditioning circuit（14）With A/D circuits 4（15）Connect；A/D circuits 4（15）With CPU 4（16）Connect；Leakage current transformer（17）With leakage current signal conditioning circuit（18）Connect；Leakage current signal conditioning circuit（18）With A/D circuits 5（19）Connect；A/D circuits 5（19）With CPU 5（20）Connect；The output information of each CPU all and is connected to DSP unit（21）Input；DSP unit（21）Output and display（22）Connect；DSP unit（21）Output and keyboard and control circuit（23）Connect；DSP unit（21）Output and alarm lamp（24）Connect；DSP unit（21）Output and warning output contact（25）Connect；DSP unit（21）Output and communication interface with pc（26）Connect；Working power module（27）The power supply of offer device operation；System insulation monitors electric bridge（1）Send monitoring insulating signal to bridge signal treatment loop（2）, bridge signal treatment loop（2）The monitoring insulating signal for collecting is carried out into calculation process, 0-5V analogue signals are converted into, A/D circuits 1 are conveyed to（3）It is adjusted to digital signal and is conveyed to CPU 1 again（4）, CPU 1（4）Each signal is conveyed to DSP unit（21）；Monitoring means are scurried in exchange（5）Monitoring exchange ingress signal sends exchange ingress signal treatment loop to（6）, exchange ingress signal treatment loop（6）The exchange ingress signal for collecting is carried out into calculation process, 0-5V analogue signals are converted into, A/D circuits 2 are conveyed to（7）It is adjusted to digital signal and is conveyed to CPU 2 again（8）, CPU 2（8）Each signal is conveyed to DSP unit（21）；Direct current mutually alters monitoring means（9）Monitoring direct current is mutually altered the signal of telecommunication and sends direct current to and mutually alters signal conditioning circuit（10）, direct current mutually alters signal conditioning circuit（10）The direct current for collecting mutually is altered the signal of telecommunication carries out calculation process, is converted into 0-5V analogue signals, is conveyed to A/D circuits 3（11）It is adjusted to digital signal and is conveyed to CPU 3 again（12）, CPU 3（12）Each signal is conveyed to DSP unit（21）；Accumulator loop monitoring means（13）Monitoring accumulator battery insulating signal sends accumulator monitoring signal conditioning circuit to（14）, accumulator monitoring signal conditioning circuit（14）The set of cells insulating signal for collecting is carried out into calculation process, 0-5V analogue signals are converted into, A/D circuits 4 are conveyed to（15）It is adjusted to digital signal and is conveyed to CPU 4 again（16）, CPU 4（16）Each signal is conveyed to DSP unit（21）；Leakage current transformer（17）Sense that the leakage current signal of each duplexure sends leakage current signal conditioning circuit to（18）, leakage current signal conditioning circuit（18）Each leakage current signal of collection is carried out into calculation process, 0-5V analogue signals is converted into, is conveyed to A/D circuits 5（19）It is adjusted to digital signal and is conveyed to CPU 5 again（20）, CPU 5（20）Each signal is conveyed to DSP unit（21）, leakage current transformer（17）It is installed on each branch feeder of DC source, leakage current transformer（17）Quantity is determined by each point of feeder line quantity of DC power system；DSP unit（21）Receiving the signal that each CPU sends over carries out FFT high-speed computations, calculates actual bus insulation resistance, positive voltage-to-ground, negative voltage-to-ground, positive resistance to earth, negative resistance to earth, bus voltage value, exchange and scurries into value, direct current and mutually alter resistance value, storage battery insulating value, each loop leakage current value；DSP unit（21）The signal arrived by measuring and calculation, keyboard and control circuit（23）Will be by user's difference requirement setting correlation values, DSP unit（21）The numerical value for detecting is compared with original setting value, while display（22）Show that insulation information, exchange are scurried into information, direct current and mutually alters electrical information, storage battery insulating information, leakage current information, while by alarm lamp（24）Warning output is carried out to abnormal information；And DSP unit（21）It is connected to communication interface with pc（26）Data are uploaded by upper computer software；DSP unit（21）Connection warning output contact（25）, output contact during warning（25）Closure；Working power module（27）The 220V Power converts of DC power system are supplied to into each unit circuit into voltages such as 5V, 12V, it is ensured that each normal circuit operation.
DC power system state of insulation monitors electric bridge by system insulation（1）Measurement, exchange are scurried into the failure of DC current and scurry into monitoring means by exchange（5）Monitoring means are mutually altered by direct current by various different mutually altering for DC sources initiation by measurement, transformer station（9）The earth fault that measurement, accumulator cause is by accumulator loop monitoring means（13）Measure, branch insulation is bad or earth fault is by each branch road leakage current transformer（17）Measurement；The signal of each measurement is sent to respective CPU Jing after A/D circuit conversions after the process of measurement of correlation treatment loop to be carried out calculation process and each sampled value calculating is processed using fft algorithm, is then sent through DSP unit（21）Judge the state of each branch road, make the various ground connection informations of whole DC source insulating monitoring state and each several part grounding failure carry out unified measurement.With Contents for Monitoring that is clear, clear, effectively increasing whole insulation monitoring and warning device.
Embodiment two：As shown in Fig. 2 a kind of described Insulation Inspection Device for Direct-Current System, is further characterized in that：Bound cell formula structure, by system insulation monitoring board（28）, exchange scurry into monitoring board（29）, direct current mutually alter monitoring board（30）, storage battery insulating monitoring board（31）, loop leakage current monitoring plate（32）, DSP mainboards（33）, device display panel（34）, communication alarming plate（35）Constitute；System insulation monitoring board（28）Including：System insulation monitors electric bridge（1）, bridge signal treatment loop（2）, A/D circuits 1（3）、CPU 1（4）Deng four assembly of elements；Monitoring board is scurried in exchange（29）Including：Monitoring means are scurried in exchange（5）, exchange ingress signal treatment loop（6）, A/D circuits 2（7）、CPU 2（8）Deng four assembly of elements；Direct current mutually alters monitoring board（30）Including：Direct current mutually alters monitoring means（9）, direct current mutually alter signal conditioning circuit（10）, A/D circuits 3（11）、CPU 3（12）（12）Deng four assembly of elements；Storage battery insulating monitoring board（31）Including：Accumulator loop monitoring means（13）, accumulator monitoring signal conditioning circuit（14）, A/D circuits 4（15）、CPU 4（16）Deng four assembly of elements；Loop leakage current monitoring plate（32）Including：Leakage current signal conditioning circuit（18）, A/D circuits 5（19）、CPU 5（20）Deng three assembly of elements；Leakage current transformer（17）It is installed on each duplexure of each DC power supply panel, the output signal of leakage current transformer is connected to leakage current signal processing circuit；DSP mainboards（33）Including：DSP unit（21）, working power module（27）Deng two assembly of elements；Device display panel（34）Including：Display（22）, keyboard and control circuit（23）, alarm lamp（24）Deng three cell mesh；Communication alarming plate（35）Including：Warning output contact（25）, communication interface with pc（26）Deng two assembly of elements.
The structure of this bound cell formula, greatly facilitates maintenance, improves the reliability of device, for the unwanted function of occasion can not access the function wiring board；For example：Only the transformer station of one group of DC power system, avoids the need for monitoring direct current and mutually alters function, also avoids the need for insertion direct current and mutually alters monitoring board（30）, and do not affect the normal use of device.
System insulation monitoring board（28）Including：
System insulation monitors electric bridge（1）, bridge signal treatment loop（2）, A/D circuits 1（3）、CPU 1（4）Deng four assembly of elements, a circuit board plugged with card i/f and DSP mainboards is made；System insulation monitors electric bridge（1）Bus insulation signal is monitored by the way of balanced bridge is combined with unbalanced bridge, the parameters such as divider bridge over the ground, measurement DC bus-bar voltage, negative voltage-to-ground, positive voltage-to-ground, positive resistance to earth value, negative resistance to earth value are constituted using branched high-power, precision resister；Bridge signal treatment loop（2）, bridge signal is gathered, system insulation is monitored into electric bridge（1）The numerical value of measurement carries out calculation process, makes the voltage signal that the magnitude of voltage of output is converted to 0-5V give A/D circuits（3）Digital signal is converted to CPU 1（4）Calculate 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.
Monitoring board is scurried in exchange（29）Including：
Monitoring means are scurried in exchange（5）, exchange ingress signal treatment loop（6）, A/D circuits 2（7）、CPU 2（8）Deng four assembly of elements, a circuit board plugged with card i/f and DSP mainboards, interface homologous ray insulating monitoring plate are made（28）；Monitoring means are scurried in exchange（5）Real-time monitor the ac voltage signal in DC power system, real-time trace information treatment technology monitoring exchange ingress signal；Measuring method exchanges shelves measurement DC source unanimously with using circuit tester, and ac voltage signal is sent to exchange ingress signal treatment loop（6）The d. c. voltage signal for making output voltage values be 0-5V, gives A/D circuits 2（7）Digital signal is converted to, CPU 2 is allowed（8）Process, realize that monitoring is scurried in exchange in real time, once DC source occurs in that exchange is scurried into D. C. power source breakdown and will give DSP unit（21）.
Direct current mutually alters monitoring board（30）Including：
Direct current mutually alters monitoring means（9）, direct current mutually alter signal conditioning circuit（10）, A/D circuits 3（11）、CPU 3（12）（12）Deng four assembly of elements, the circuit board plugged with card i/f and DSP mainboards is made, interface is identical with above-mentioned plate；Direct current mutually alters monitoring means（9）Circuit is detected using quick high accuracy, the direct current between the two sections of buses in real-time detection scene mutually alters signal；Direct current mutually alters signal conditioning circuit（10）Collection direct current mutually alters monitoring means（9）The direct current for monitoring mutually is altered signal and carries out calculation process, makes the magnitude of voltage of output for the d. c. voltage signal of 0-5V, gives A/D circuits 3（11）Digital signal is converted into, CPU 3 is allowed（12）Process, realize that real-time direct current mutually alters monitoring.
Storage battery insulating monitoring board（31）Including：
Accumulator loop monitoring means（13）, accumulator monitoring signal conditioning circuit（14）, A/D circuits 4（15）、CPU 4（16）In four unit portions, part makes the circuit board plugged with card i/f and DSP mainboards, and interface is identical with above-mentioned plate；Accumulator loop monitoring means（13）Automatic or manual monitoring accumulator battery insulating signal is carried out using high impedance electric bridge；Accumulator monitoring signal conditioning circuit（14）Collection accumulator loop monitoring means（13）The accumulator battery insulating signal for monitoring carries out calculation process, makes the magnitude of voltage of output for the d. c. voltage signal of 0-5V, gives A/D circuits 4（15）Digital signal is changed into, CPU 4 is allowed（16）Process, realize real-time storage battery insulating monitoring.
Loop leakage current monitoring plate（32）Including：
Leakage current signal conditioning circuit（18）, A/D circuits 5（19）、CPU 5（20）Deng three assembly of elements, the circuit board plugged with card i/f and DSP mainboards is made, interface is identical with above-mentioned plate；Leakage current transformer（17）It is installed on each branch's route of each unidirectional current fluid layer, by standard analog signal or RS485 digital signals such as tested exchange micro-current, DC-isolation conversion DC current linearly, DC voltages；Leakage current signal conditioning circuit（18）Collection leakage current transformer（17）The current signal for sensing carries out calculation process, makes the magnitude of voltage of output for the d. c. voltage signal of 0-5V, gives A/D circuits 5（19）Digital signal is converted into, CPU 5 is allowed（20）Process, realize real-time Current Mutual Inductance monitoring.
DSP mainboards（33）Including：
DSP unit（21）, working power module（27）Deng two assembly of elements, make and connect with above-mentioned circuit board with card i/f circuit board；DSP unit（21）To five CPU（The signal brought is processed, and continuous analog signal is measured or filtered；Working power module（27）Using power semiconductor as switch element, by periodicity on and off switch, the duty of controlling switch element is adjusting output voltage.
Device display panel（34）Including：
Display（22）, keyboard and control circuit（23）, alarm lamp（24）Deng three cell mesh, a circuit board is made, on plate, set up a socket part and DSP mainboards（33）Connect；Display（22）Display unit is in DSP unit（21）Software under be shown as Chinese symbol, using 3.5 cun of LCDs, resolution is not less than 320*240；Keyboard and control circuit（23）A kind of instruction and data input equipment of operation equipment operation, current amplitude, device minimum voltage value, alarming value required for setting, and the setting of upper machine communication baud rate；Alarm lamp（24）It is located on the panel of device with keyboard.
Communication alarming plate（35）Including：
Warning output contact（25）, communication interface with pc（26）The back side that a wiring board is installed on instrument is made Deng two unit pieces, standby binding post is connected with outside；Warning output contact（25）It is made up of several dry contacts, there is provided the dry contact of instrument external alert output relay；Communication interface with pc（26）Using modular software design, connect DSP unit（21）, can very easily increase various protocol modules and other functions module, communication interface with pc（26）Various communication interfaces can be internally provided：Ethernet（10/100Base-TX、100Base-FX）, serial ports（RS-232/485/422）And other field-bus interfaces, while various stipulations can be run on these interfaces（IEC 60870-5-103 etc.）, communication interface with pc（26）Multiple Ethernets can be externally provided（10/100Base-TX、100Base-FX）, numeral RS-232 and analog channel interface, while various protocols can be suitable for（60870-5-101, IEC60870-5-104, DNP3.0 etc.）.
A/D circuits：
A/D circuits 1（3）, A/D circuits 2（7）, A/D circuits 3（11）, A/D circuits 4（15）, A/D circuits 5（19）The analogue signal of various information is changed, digital signal is converted into, the main devices model of five A/D conversion electrical equipment is that TIADS123OPW is provided by ADI or BB companies, is 16 A/D converters, it is ensured that the precision and DSP unit of measurement（21）There is good compatibility.
CPU ：
CPU 1（4）、CPU 2（8）、CPU 3（12）、CPU 4（16）、CPU 5（20）Using 32 bit CPU chip models MS430, the calculation process of digital signal is rapidly realized, employ instruction pipeline and perform structure and corresponding parallel processing structure, in a cycle data can be carried out with arithmetical operation and the logical operationss of high speed.
Claims (2)
1. a kind of Insulation Inspection Device for Direct-Current System, it is characterised in that include：System insulation monitors electric bridge, bridge signal treatment loop, A/D circuits 1, CPU 1, monitoring means are scurried in exchange, exchange ingress signal treatment loop, A/D circuits 2, CPU 2, direct current mutually alters monitoring means, direct current mutually alters signal conditioning circuit, A/D circuits 3, UPS 3, accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, A/D circuits 4, CPU 4, leakage current transformer, leakage current signal conditioning circuit, A/D circuits 5, CPU 5, DSP unit, display, keyboard and control circuit, alarm lamp, warning output contact, communication interface with pc, working power module etc.；System insulation monitoring electric bridge is connected with bridge signal treatment loop；Bridge signal treatment loop is connected with A/D circuits 1；A/D circuits 1 are connected with CPU 1；Exchange is scurried into monitoring means and exchanges ingress signal treatment loop and connect；Exchange ingress signal treatment loop is connected with A/D circuits 2；A/D circuits 2 are connected with CPU 2；Direct current is mutually altered monitoring means and mutually alters signal conditioning circuit with direct current and connects；Direct current is mutually altered signal conditioning circuit and is connected with A/D circuits 3；A/D circuits 3 are connected with CPU 3；Accumulator loop monitoring means are connected with accumulator monitoring signal conditioning circuit；Accumulator monitoring signal conditioning circuit is connected with A/D circuits 4；A/D circuits 4 are connected with CPU 4；Leakage current transformer is connected with leakage current signal conditioning circuit；Leakage current signal conditioning circuit is connected with A/D circuits 5；A/D circuits 5 are connected with CPU 5；The output information of each CPU all and is connected to DSP unit input；DSP unit output is connected with display；DSP unit output is connected with keyboard with control circuit；DSP unit output is connected with alarm lamp；DSP unit output is connected with warning output contact；DSP unit output is connected with communication interface with pc.
2. a kind of Insulation Inspection Device for Direct-Current System described in claim 1, is further characterized in that：Bound cell formula structure, is scurried into monitoring board, direct current and mutually alters monitoring board, storage battery insulating monitoring board, loop leakage current monitoring plate, DSP unit mainboard, device display panel, communication alarming plate and constituted by system insulation monitoring board, exchange；System insulation monitoring board includes：Four assembly of elements such as system insulation monitoring electric bridge, bridge signal treatment loop, A/D circuits 1, CPU 1；Monitoring board is scurried in exchange to be included：Four assembly of elements such as monitoring means, exchange ingress signal treatment loop, A/D circuits 2, CPU 2 are scurried in exchange；Direct current mutually alters monitoring board to be included：Direct current is mutually altered monitoring means, direct current and mutually alters four assembly of elements such as signal conditioning circuit, A/D circuits 3, CPU 3；Storage battery insulating monitoring board includes：Four assembly of elements such as accumulator loop monitoring means, accumulator monitoring signal conditioning circuit, A/D circuits 4, CPU 4；Loop leakage current monitoring plate includes：Three assembly of elements such as leakage current signal conditioning circuit, A/D circuits 5, CPU 5；Leakage current transformer
It is installed on each duplexure of each DC power supply panel；DSP unit mainboard includes：Two assembly of elements such as DSP unit, working power module；Display panel includes：Three cell mesh such as display, keyboard and control circuit, alarm lamp；Communication alarming plate includes：Two assembly of elements such as warning output contact, communication interface with pc；Communication interface with pc is installed on each contact and communication wire behind device, stays right binding post to facilitate wiring.
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| CN201510620794.6A CN106556778A (en) | 2015-09-25 | 2015-09-25 | A kind of Insulation Inspection Device for Direct-Current System |
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| CN110579697A (en) * | 2019-10-25 | 2019-12-17 | 国网江苏省电力有限公司盐城供电分公司 | Multifunctional insulation detection device based on direct current system and detection method thereof |
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
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Address after: 325800 Cangnan Industrial Park, Wenzhou, Zhejiang, 06 blocks through two road. Applicant after: ZHEJIANG KECHANG ELECTRONICS CO.,LTD. Address before: 325800 Cangnan Industrial Park, Wenzhou, Zhejiang, 06 blocks through two road. Applicant before: ZHEJIANG KE CHANG ELECTRONIC Co.,Ltd. |
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Application publication date: 20170405 |