CN103308755B - The insulation detection device of high voltage direct current remote electric power system and method - Google Patents
The insulation detection device of high voltage direct current remote electric power system and method Download PDFInfo
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- CN103308755B CN103308755B CN201310221382.6A CN201310221382A CN103308755B CN 103308755 B CN103308755 B CN 103308755B CN 201310221382 A CN201310221382 A CN 201310221382A CN 103308755 B CN103308755 B CN 103308755B
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Abstract
The invention provides a kind of insulation detection device and method of high voltage direct current remote electric power system, this device comprises an insulation circuit for detecting, insulation circuit for detecting comprises: voltage detecting circuit, the insulation protection magnitude of voltage between the positive and negative busbar of collection high voltage direct current remote electric power system; Positive pole reference circuit, the positive pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system; Negative pole reference circuit, the negative pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system; Comparator circuit, is connected with negative pole reference circuit respectively with voltage detecting circuit, positive pole reference circuit, compares insulation protection magnitude of voltage and whether is less than negative pole reference voltage value or is greater than positive pole reference voltage value.The present invention directly gathers insulation protection magnitude of voltage, positive pole reference voltage value and negative pole reference voltage value, judges the decline situation of master row insulating resistance, can arrange the size of insulation resistance flexibly, not by the impact of positive and negative busbar voltage swing.
Description
Technical field
The invention belongs to high voltage electrical isolation resist technology field, relate to a kind of insulation detection device, particularly relate to a kind of insulation detection device and method of high voltage direct current remote electric power system.
Background technology
In high-voltage direct current, in order to personal safety, generally all require that the high-voltage dc signal that system exports suspends over the ground, even if touch power supply one end so because of carelessness, owing to not forming loop, so also can not get an electric shock with the earth.But when there is insulation damages, during the situations such as human body overlap joint, if do not provide alarm signal in time, great threat will be formed to the life of people.Therefore, in high-voltage direct current, need to detect the insulation status of DC bus in time and judge, when bus insulation resistance drops to below setting value, system needs to carry out alarm and protection.
Some have been had to study to the detection of insulation resistance at present, the method of these researchs is similar, mainly between DC bus both positive and negative polarity and electric chassis, access resistance, resistance and the earth is connected by electronic switch or high-voltage relay, then measure these ohmically voltage or electric currents, then calculate the size of insulation resistance.These methods all need electronic switch or high-voltage relay and curtage sensor device, and cost is higher, and detection method also limits by the voltage range of system itself.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of insulation detection device and method of high voltage direct current remote electric power system, high for solving Insulation monitoring cost in prior art, the problem that the voltage range by high voltage direct current remote electric power system itself limits.
For achieving the above object and other relevant objects, the invention provides a kind of insulation detection device and method of high voltage direct current remote electric power system.
A kind of insulation detection device of high voltage direct current remote electric power system, the insulation detection device of described high voltage direct current remote electric power system comprises an insulation circuit for detecting, described insulation circuit for detecting comprises: voltage detecting circuit, the insulation protection magnitude of voltage between the positive and negative busbar of collection high voltage direct current remote electric power system; Positive pole reference circuit, the positive pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system; Negative pole reference circuit, the negative pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system; Comparator circuit, is connected with negative pole reference circuit respectively with described voltage detecting circuit, positive pole reference circuit, and whether more described insulation protection magnitude of voltage is less than described negative pole reference voltage value or is greater than described positive pole reference voltage value.
Preferably, the power circuit of power voltage supply between the positive and negative busbar that described insulation circuit for detecting also comprises a collection high voltage direct current remote electric power system, described power circuit is connected with described comparator circuit, for comparator circuit is powered.
Preferably, the insulation detection device of described high voltage direct current remote electric power system also comprises one sends alarm alarm module when the comparative result that described comparator circuit exports is undesirable, described alarm module is connected with described comparator circuit by an optical coupling isolation circuit, and described optical coupling isolation circuit is connected with described power circuit.
Preferably, described comparator circuit comprises: the first comparing unit, be connected respectively with described positive pole reference circuit with described voltage detecting circuit, the size of more described insulation protection magnitude of voltage and described positive pole reference voltage value, high level is exported when described insulation protection magnitude of voltage is less than described positive pole reference voltage value, otherwise output low level; Second comparing unit; be connected respectively with described negative pole reference circuit with described voltage detecting circuit; the size of more described insulation protection magnitude of voltage and described negative pole reference voltage value, exports high level when described insulation protection magnitude of voltage is greater than described negative pole reference voltage value, otherwise output low level.
Preferably, described optical coupling isolation circuit comprises: the first light-coupled isolation unit, is connected respectively with alarm module with described first comparing unit, described power circuit, the not conducting when described first comparing unit exports high level, conducting during output low level; Second light-coupled isolation unit, is connected with alarm module respectively with described second comparing unit, described power circuit, the not conducting when described second comparing unit exports high level, conducting during output low level.
Preferably, described voltage detecting circuit comprises resistance R1, R2, R3, electric capacity C1; The value of resistance R1 equals the resistance sum of resistance R2 and R3; Described resistance R1, R2, R3 series connection, electric capacity C1 is in parallel with resistance R3, the other end of resistance R1 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R3 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R3 is connected with resistance R2 is the output terminal of voltage detecting circuit, exports described insulation protection magnitude of voltage; Described positive pole reference circuit comprises resistance R4, R5, electric capacity C2; Described resistance R4, R5 series connection, electric capacity C2 is in parallel with resistance R5, the other end of resistance R4 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R5 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R5 is connected with resistance R4 is the output terminal of positive pole reference circuit, exports described positive pole reference voltage value; Described negative pole reference circuit comprises resistance R6, R7, electric capacity C3; Described resistance R6, R7 series connection, electric capacity C3 is in parallel with resistance R7, the other end of resistance R6 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R7 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R7 is connected with resistance R6 is the output terminal of negative pole reference circuit, exports described negative pole reference voltage value.
An insulation detecting method for high voltage direct current remote electric power system, described insulation detecting method comprises:
Insulation protection magnitude of voltage between the positive and negative busbar of collection high voltage direct current remote electric power system;
The positive pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system;
The negative pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system;
Whether more described insulation protection magnitude of voltage is less than described negative pole reference voltage value or is greater than described positive pole reference voltage value.
Preferably, described insulation detecting method also comprises: the not trigger alerts when described insulation protection magnitude of voltage is less than described positive pole reference voltage value, otherwise trigger alerts; The not trigger alerts when described insulation protection magnitude of voltage is greater than described negative pole reference voltage value, otherwise trigger alerts.
Preferably, described insulation detecting method also comprises: between the positive and negative busbar of collection high voltage direct current remote electric power system, voltage is as power supply.
Preferably, described insulation detecting method also comprises: utilize the first voltage sampling circuit to gather insulation protection magnitude of voltage between the positive and negative busbar of high voltage direct current remote electric power system; Described first voltage sampling circuit comprises resistance R1, R2, R3, electric capacity C1; The value of resistance R1 equals the resistance sum of resistance R2 and R3; Described resistance R1, R2, R3 series connection, electric capacity C1 is in parallel with resistance R3, the other end of resistance R1 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R3 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R3 is connected with resistance R2 is the output terminal of voltage detecting circuit, exports described insulation protection magnitude of voltage; The second voltage sampling circuit is utilized to gather the positive pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; Described second voltage sampling circuit comprises resistance R4, R5, electric capacity C2; Described resistance R4, R5 series connection, electric capacity C2 is in parallel with resistance R5, the other end of resistance R4 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R5 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R5 is connected with resistance R4 is the output terminal of positive pole reference circuit, exports described positive pole reference voltage value; Tertiary voltage sample circuit is utilized to gather the negative pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; Described tertiary voltage sample circuit comprises resistance R6, R7, electric capacity C3; Described resistance R6, R7 series connection, electric capacity C3 is in parallel with resistance R7, the other end of resistance R6 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R7 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R7 is connected with resistance R6 is the output terminal of negative pole reference circuit, exports described negative pole reference voltage value.
As mentioned above, the insulation detection device of high voltage direct current remote electric power system of the present invention and method, have following beneficial effect:
The present invention is directly applied in high voltage direct current remote electric power system and exports on positive and negative busbar, by single-chip microcomputer or DSP read switch amount, judges the decline situation of master row insulating resistance, and single-chip microcomputer and insulation circuit for detecting electrical isolation, reliable and stable; Utilize voltage detecting circuit, positive pole reference circuit, negative pole reference circuit directly to gather insulation protection magnitude of voltage, positive pole reference voltage value and negative pole reference voltage value respectively simultaneously; the size of insulation resistance can be set flexibly; not by the impact of bus (i.e. positive and negative busbar) voltage swing; applied range; and structure is simple; easy to operate, cost is low.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the insulation detection device of high voltage direct current remote electric power system of the present invention.
Fig. 2 is the concrete structure schematic diagram of the insulation detection device of high voltage direct current remote electric power system of the present invention.
Fig. 3 is the concrete implementing circuit figure of one of the insulation detection device of high voltage direct current remote electric power system of the present invention.
Fig. 4 is the schematic flow sheet of the insulation detecting method of high voltage direct current remote electric power system of the present invention.
Element numbers explanation
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
Refer to accompanying drawing.It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment
The present embodiment provides a kind of insulation detection device of high voltage direct current remote electric power system, as shown in Figure 1, the insulation detection device of described high voltage direct current remote electric power system comprises insulation circuit for detecting 100 and alarm module 200, wherein, electrical isolation between alarm module 200 and insulation circuit for detecting 100, not altogether.
As shown in Figure 2, described insulation circuit for detecting 100 comprises voltage detecting circuit 110, positive pole reference circuit 120, negative pole reference circuit 130, comparator circuit 140, optical coupling isolation circuit 150, power circuit 160.Wherein, described voltage detecting circuit 110 gathers the insulation protection magnitude of voltage between the positive and negative busbar (positive busbar and BUS+, negative busbar and BUS-) of high voltage direct current remote electric power system; Positive pole reference circuit 120 gathers the positive pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; Negative pole reference circuit 130 gathers the negative pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; Comparator circuit 140 is connected with negative pole reference circuit 130 respectively with described voltage detecting circuit 110, positive pole reference circuit 120, and whether more described insulation protection magnitude of voltage is less than described negative pole reference voltage value or is greater than described positive pole reference voltage value; Described optical coupling isolation circuit 150 is connected with described comparator circuit 140, the communication of isolation or conducting comparator circuit 140 and alarm module 200; Between the positive and negative busbar that described power circuit 160 gathers high voltage direct current remote electric power system, voltage is used as power supply; Described power circuit 160 is connected with optical coupling isolation circuit 150 respectively with described comparator circuit 140, for comparator circuit 140 and optical coupling isolation circuit 150 are powered.Described alarm module 200 sends alarm when the comparative result that described comparator circuit 140 exports is undesirable, and described alarm module 140 is connected with described comparator circuit 140 by optical coupling isolation circuit 150.
Further, described comparator circuit 140 comprises the first comparing unit 141 and the second comparing unit 142; Described first comparing unit 141 is connected with described positive pole reference circuit 120 respectively with described voltage detecting circuit 110, the size of more described insulation protection magnitude of voltage and described positive pole reference voltage value, high level is exported when described insulation protection magnitude of voltage is less than described positive pole reference voltage value, otherwise output low level; Described second comparing unit 142 is connected with described negative pole reference circuit 130 respectively with described voltage detecting circuit 110; the size of more described insulation protection magnitude of voltage and described negative pole reference voltage value; high level is exported when described insulation protection magnitude of voltage is greater than described negative pole reference voltage value, otherwise output low level.
Described optical coupling isolation circuit 150 comprises: the first light-coupled isolation unit 151 and the second light-coupled isolation unit 152; Described first light-coupled isolation unit 151 is connected with alarm module 200 respectively with described first comparing unit 141, described power circuit 160, the not conducting when described first comparing unit 141 exports high level, conducting during output low level; Second light-coupled isolation unit 152 is connected with alarm module 200 respectively with described second comparing unit 142, described power circuit 160, the not conducting when described second comparing unit 142 exports high level, conducting during output low level.
Further, as shown in Figure 3, described voltage detecting circuit 110 comprises resistance R1, R2, R3, electric capacity C1; The value of resistance R1 equals the resistance sum of resistance R2 and R3; Described resistance R1, R2, R3 series connection; electric capacity C1 is in parallel with resistance R3; the other end of resistance R1 is connected with the positive busbar of described high voltage direct current remote electric power system; the other end of resistance R3 is connected with the negative busbar of described high voltage direct current remote electric power system; one end that resistance R3 is connected with resistance R2 is the output terminal of voltage detecting circuit, exports described insulation protection magnitude of voltage.
Described positive pole reference circuit 120 comprises resistance R4, R5, electric capacity C2; Described resistance R4, R5 series connection, electric capacity C2 is in parallel with resistance R5, the other end of resistance R4 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R5 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R5 is connected with resistance R4 is the output terminal of positive pole reference circuit, exports described positive pole reference voltage value.Example is dropped to, V with positive pole (i.e. positive busbar BUS+) insulation against ground resistance
bfor reference voltage, V time normal
bvoltage is higher than V
avoltage, now optocoupler not conducting, V
efor low level; When positive pole insulation drops to certain value, V
avoltage rise is higher than V
bvoltage, now optocoupler conducting, V
efor high level.
Described negative pole reference circuit 130 comprises resistance R6, R7, electric capacity C3; Described resistance R6, R7 series connection, electric capacity C3 is in parallel with resistance R7, the other end of resistance R6 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R7 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R7 is connected with resistance R6 is the output terminal of negative pole reference circuit, exports described negative pole reference voltage value.Example is dropped to, V with negative pole (i.e. negative busbar BUS-) insulation against ground resistance
cfor reference voltage, V time normal
avoltage is higher than V
cvoltage, comparer exports as high level, now optocoupler not conducting, V
dfor low level; When negative insulation drops to certain value, V
avoltage drop is lower than V
cvoltage, now optocoupler conducting, V
dfor high level.
The resistance of R5, R7 is chosen according to the insulation drop-out value that will detect.V during normal work
a(insulation protection magnitude of voltage) is less than V
b(positive pole reference voltage value), V
abe greater than V
c(positive pole reference voltage value), now 1 pin of comparer (i.e. the first comparing unit and the second comparing unit) and 7 pin export as high level, and optocoupler (i.e. optical coupling isolation circuit 150) not conducting, now alarm module detects low level not alarm.When positive pole (i.e. positive busbar BUS+) insulation against ground resistance is less than setting value, V
awill higher than V
b, now 1 pin of comparer and 7 pin export as low level, and optocoupler conducting, now alarm module detects that high level sends alarm.If when in like manner negative pole (i.e. negative busbar BUS-) resistance to earth is less than setting value, V
alower than V
c, now optocoupler conducting, alarm module detects that high level sends alarm.
In described comparator circuit 140, the first comparing unit 141 and the second comparing unit 142 all can adopt comparer.
The first light-coupled isolation unit 151 in described optical coupling isolation circuit 150 and the second light-coupled isolation unit 152 all can adopt photoelectrical coupler.
Described power circuit 160 comprises resistance R8, LED1, voltage stabilizing diode ZD1, electric capacity C4, C5; Resistance R8, LED1 and voltage stabilizing diode ZD1 connect, electric capacity C4, C5 are all in parallel with voltage stabilizing diode ZD1, the other end of resistance R8 is connected with the positive busbar of described high voltage direct current remote electric power system, the negative pole of voltage stabilizing diode ZD1 is connected with the negative busbar of described high voltage direct current remote electric power system, the voltage output end of the just very power circuit 160 of voltage stabilizing diode ZD1.As power light, LED1 judges that whether the current supply circuit of power circuit 160 is working properly.
Described alarm module 200 can be preferably single-chip microcomputer or DSP, but is not limited thereto scope.V is read by alarm module 200
dand V
ethe height of level, can judge whether positive and negative busbar insulation against ground resistance declines.
The present embodiment also provides a kind of insulation detecting method of high voltage direct current remote electric power system, this insulation detecting method can be realized by the insulation detection device of high voltage direct current remote electric power system of the present invention, but the implement device of the insulation detecting method of this high voltage direct current remote electric power system includes but not limited to the insulation detection device of high voltage direct current remote electric power system of the present invention.
As shown in Figure 4, described insulation detecting method comprises:
Insulation protection magnitude of voltage between the positive and negative busbar of collection high voltage direct current remote electric power system.Particularly, the first voltage sampling circuit is utilized to gather insulation protection magnitude of voltage between the positive and negative busbar of high voltage direct current remote electric power system; See Fig. 3, described first voltage sampling circuit comprises resistance R1, R2, R3, electric capacity C1; The value of resistance R1 equals the resistance sum of resistance R2 and R3; Described resistance R1, R2, R3 series connection; electric capacity C1 is in parallel with resistance R3; the other end of resistance R1 is connected with the positive busbar of described high voltage direct current remote electric power system; the other end of resistance R3 is connected with the negative busbar of described high voltage direct current remote electric power system; one end that resistance R3 is connected with resistance R2 is the output terminal of voltage detecting circuit, exports described insulation protection magnitude of voltage.
The positive pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system.Particularly, the second voltage sampling circuit is utilized to gather the positive pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; See Fig. 3, described second voltage sampling circuit comprises resistance R4, R5, electric capacity C2; Described resistance R4, R5 series connection, electric capacity C2 is in parallel with resistance R5, the other end of resistance R4 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R5 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R5 is connected with resistance R4 is the output terminal of positive pole reference circuit, exports described positive pole reference voltage value.Wherein, the resistance of resistance R5 can calculate acquisition according to following methods: first suppose that resistance equals to need the resistance R ' of the positive pole insulation against ground drop-out value detected in parallel with R1, calculate the voltage at now R3 two ends, then make the voltage at R5 two ends equal the voltage at R3 two ends, calculate the resistance of R5 thus.
The negative pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system.Particularly, tertiary voltage sample circuit is utilized to gather the negative pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; See Fig. 3, described tertiary voltage sample circuit comprises resistance R6, R7, electric capacity C3; Described resistance R6, R7 series connection, electric capacity C3 is in parallel with resistance R7, the other end of resistance R6 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R7 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R7 is connected with resistance R6 is the output terminal of negative pole reference circuit, exports described negative pole reference voltage value.Wherein, the resistance of resistance R7 can calculate acquisition according to following methods: first suppose that resistance equals to need the resistance R of the negative pole insulation against ground drop-out value detected " in parallel with R2 and R3; calculate the voltage at now R3 two ends; then make the voltage at R7 two ends equal the voltage at now R3 two ends, calculate the resistance of R7 thus.
When calculating positive pole insulation against ground declining, V
aconnect the inverting input of comparer, V
bconnect the normal phase input end of comparer; When calculating negative pole insulation against ground declining, V
aconnect comparer normal phase input end, V
cconnect comparer inverting input; The return difference of comparer can as required by R13, R14 to choose suitable resistance value respectively to determine.
Whether more described insulation protection magnitude of voltage is less than described negative pole reference voltage value or is greater than described positive pole reference voltage value; The not trigger alerts when described insulation protection magnitude of voltage is less than described positive pole reference voltage value, otherwise trigger alerts; The not trigger alerts when described insulation protection magnitude of voltage is greater than described negative pole reference voltage value, otherwise trigger alerts.
Further, described insulation detecting method also comprises: between the positive and negative busbar of collection high voltage direct current remote electric power system, voltage is as power supply.
The present invention is directly applied in high voltage direct current remote electric power system and exports on positive and negative busbar, by single-chip microcomputer or DSP read switch amount, judges the decline situation of master row insulating resistance, and single-chip microcomputer and insulation circuit for detecting electrical isolation, reliable and stable; Utilize voltage detecting circuit, positive pole reference circuit, negative pole reference circuit directly to gather insulation protection magnitude of voltage, positive pole reference voltage value and negative pole reference voltage value respectively simultaneously; the size of insulation resistance can be set flexibly; not by the impact of bus (i.e. positive and negative busbar) voltage swing; applied range; and structure is simple; easy to operate, cost is low.
In sum, the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (8)
1. an insulation detection device for high voltage direct current remote electric power system, is characterized in that, the insulation detection device of described high voltage direct current remote electric power system comprises an insulation circuit for detecting, and described insulation circuit for detecting comprises:
Voltage detecting circuit, the insulation protection magnitude of voltage between the positive and negative busbar of collection high voltage direct current remote electric power system;
Positive pole reference circuit, the positive pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system;
Negative pole reference circuit, the negative pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system;
Comparator circuit, is connected with negative pole reference circuit respectively with described voltage detecting circuit, positive pole reference circuit, and whether more described insulation protection magnitude of voltage is less than described negative pole reference voltage value or is greater than described positive pole reference voltage value;
Described voltage detecting circuit comprises resistance R1, R2, R3, electric capacity C1; The value of resistance R1 equals the resistance sum of resistance R2 and R3; Described resistance R1, R2, R3 series connection, electric capacity C1 is in parallel with resistance R3, the other end of resistance R1 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R3 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R3 is connected with resistance R2 is the output terminal of voltage detecting circuit, exports described insulation protection magnitude of voltage;
Described positive pole reference circuit comprises resistance R4, R5, electric capacity C2; Described resistance R4, R5 series connection, electric capacity C2 is in parallel with resistance R5, the other end of resistance R4 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R5 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R5 is connected with resistance R4 is the output terminal of positive pole reference circuit, exports described positive pole reference voltage value;
Described negative pole reference circuit comprises resistance R6, R7, electric capacity C3; Described resistance R6, R7 series connection, electric capacity C3 is in parallel with resistance R7, the other end of resistance R6 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R7 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R7 is connected with resistance R6 is the output terminal of negative pole reference circuit, exports described negative pole reference voltage value.
2. the insulation detection device of high voltage direct current remote electric power system according to claim 1, it is characterized in that: the power circuit of power voltage supply between the positive and negative busbar that described insulation circuit for detecting also comprises a collection high voltage direct current remote electric power system, described power circuit is connected with described comparator circuit, for comparator circuit is powered.
3. the insulation detection device of high voltage direct current remote electric power system according to claim 2, it is characterized in that: the insulation detection device of described high voltage direct current remote electric power system also comprises one sends alarm alarm module when the comparative result that described comparator circuit exports is undesirable, described alarm module is connected with described comparator circuit by an optical coupling isolation circuit, and described optical coupling isolation circuit is connected with described power circuit.
4. the insulation detection device of high voltage direct current remote electric power system according to claim 3, is characterized in that, described comparator circuit comprises:
First comparing unit, be connected respectively with described positive pole reference circuit with described voltage detecting circuit, the size of more described insulation protection magnitude of voltage and described positive pole reference voltage value, exports high level when described insulation protection magnitude of voltage is less than described positive pole reference voltage value, otherwise output low level;
Second comparing unit; be connected respectively with described negative pole reference circuit with described voltage detecting circuit; the size of more described insulation protection magnitude of voltage and described negative pole reference voltage value, exports high level when described insulation protection magnitude of voltage is greater than described negative pole reference voltage value, otherwise output low level.
5. the insulation detection device of high voltage direct current remote electric power system according to claim 4, is characterized in that, described optical coupling isolation circuit comprises:
First light-coupled isolation unit, is connected with alarm module respectively with described first comparing unit, described power circuit, the not conducting when described first comparing unit exports high level, conducting during output low level;
Second light-coupled isolation unit, is connected with alarm module respectively with described second comparing unit, described power circuit, the not conducting when described second comparing unit exports high level, conducting during output low level.
6. an insulation detecting method for high voltage direct current remote electric power system, is characterized in that, described insulation detecting method comprises:
Insulation protection magnitude of voltage between the positive and negative busbar of collection high voltage direct current remote electric power system;
The positive pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system;
The negative pole reference voltage value of the insulation protection between the positive and negative busbar of collection high voltage direct current remote electric power system;
Whether more described insulation protection magnitude of voltage is less than described negative pole reference voltage value or is greater than described positive pole reference voltage value;
Described insulation detecting method also comprises:
The first voltage sampling circuit is utilized to gather insulation protection magnitude of voltage between the positive and negative busbar of high voltage direct current remote electric power system; Described first voltage sampling circuit comprises resistance R1, R2, R3, electric capacity C1; The value of resistance R1 equals the resistance sum of resistance R2 and R3; Described resistance R1, R2, R3 series connection, electric capacity C1 is in parallel with resistance R3, the other end of resistance R1 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R3 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R3 is connected with resistance R2 is the output terminal of voltage detecting circuit, exports described insulation protection magnitude of voltage;
The second voltage sampling circuit is utilized to gather the positive pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; Described second voltage sampling circuit comprises resistance R4, R5, electric capacity C2; Described resistance R4, R5 series connection, electric capacity C2 is in parallel with resistance R5, the other end of resistance R4 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R5 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R5 is connected with resistance R4 is the output terminal of positive pole reference circuit, exports described positive pole reference voltage value;
Tertiary voltage sample circuit is utilized to gather the negative pole reference voltage value of the insulation protection between the positive and negative busbar of high voltage direct current remote electric power system; Described tertiary voltage sample circuit comprises resistance R6, R7, electric capacity C3; Described resistance R6, R7 series connection, electric capacity C3 is in parallel with resistance R7, the other end of resistance R6 is connected with the positive busbar of described high voltage direct current remote electric power system, the other end of resistance R7 is connected with the negative busbar of described high voltage direct current remote electric power system, one end that resistance R7 is connected with resistance R6 is the output terminal of negative pole reference circuit, exports described negative pole reference voltage value.
7. the insulation detecting method of high voltage direct current remote electric power system according to claim 6, is characterized in that, described insulation detecting method also comprises:
The not trigger alerts when described insulation protection magnitude of voltage is less than described positive pole reference voltage value, otherwise trigger alerts;
The not trigger alerts when described insulation protection magnitude of voltage is greater than described negative pole reference voltage value, otherwise trigger alerts.
8. the insulation detecting method of high voltage direct current remote electric power system according to claim 7, is characterized in that, described insulation detecting method also comprises: between the positive and negative busbar of collection high voltage direct current remote electric power system, voltage is as power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3734386A4 (en) * | 2018-04-02 | 2021-03-17 | Jing-Jin Electric Technologies Co., Ltd | Insulation monitoring circuit for motor controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749423A (en) * | 2013-12-31 | 2015-07-01 | 东莞钜威新能源有限公司 | Power failure detection circuit for direct current power supply |
| DE102014201044B3 (en) * | 2014-01-21 | 2015-03-05 | Bender Gmbh & Co. Kg | Insulation monitoring device for simultaneous monitoring of network sections of an ungrounded power supply system |
| CN105425121A (en) * | 2015-11-13 | 2016-03-23 | 国网山东省电力公司德州供电公司 | Insulating material breakdown detection alarm circuit based on optical coupler |
| CN108226718A (en) * | 2017-11-30 | 2018-06-29 | 国网河南省电力公司偃师市供电公司 | A kind of insulation detection device and method of high voltage direct current electric power system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634724A (en) * | 2003-12-29 | 2005-07-06 | 泛亚汽车技术中心有限公司 | High-voltage DC insulating monitoring circuit for electric automobile |
| CN202330595U (en) * | 2011-11-30 | 2012-07-11 | 苍南盛泰电子科技有限公司 | DC (Direct Current) insulation monitoring relay |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817890B1 (en) * | 2006-08-16 | 2008-03-31 | 김보경 | Insulation monitoring system & Insulation detecting method for electric power supply system |
| US8283929B2 (en) * | 2010-06-01 | 2012-10-09 | GM Global Technology Operations LLC | Method and apparatus to monitor electric isolation of a high-voltage direct current electrical circuit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634724A (en) * | 2003-12-29 | 2005-07-06 | 泛亚汽车技术中心有限公司 | High-voltage DC insulating monitoring circuit for electric automobile |
| CN202330595U (en) * | 2011-11-30 | 2012-07-11 | 苍南盛泰电子科技有限公司 | DC (Direct Current) insulation monitoring relay |
Non-Patent Citations (1)
| Title |
|---|
| "直流系统绝缘监测综合判据";贾秀芳等;《电力系统自动化》;19990831;第23卷(第16期);第47页第1节-第49页第3.3节 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3734386A4 (en) * | 2018-04-02 | 2021-03-17 | Jing-Jin Electric Technologies Co., Ltd | Insulation monitoring circuit for motor controller |
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