CN202330646U - Grid-connected switch state detecting system of three-phase grid-connected inverter - Google Patents
Grid-connected switch state detecting system of three-phase grid-connected inverter Download PDFInfo
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- CN202330646U CN202330646U CN2011204510043U CN201120451004U CN202330646U CN 202330646 U CN202330646 U CN 202330646U CN 2011204510043 U CN2011204510043 U CN 2011204510043U CN 201120451004 U CN201120451004 U CN 201120451004U CN 202330646 U CN202330646 U CN 202330646U
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Abstract
The utility model discloses a grid-connected switch state detecting system of a three-phase grid-connected inverter. The system comprises an inverter circuit unit, a filter circuit unit, a switch circuit unit, a control circuit unit and a detection circuit unit; the output end of the inverter circuit unit is connected with the input end of the filter circuit unit; one end of the switch circuit unit is connected with the output end of the filter circuit unit, and the other end of the switch circuit unit is connected with a three-phase power grid supply wire; the input end of the control circuit unit is connected with the detection circuit unit; and the output end of the control circuit unit is connected with the input end of the inverter circuit unit and the switch circuit unit. The control circuit unit is used for receiving and analyzing level signals sent by the detection circuit unit and detecting whether the turn-off function and the turn-on function of the switch circuit unit are normal, so that the working state of the inverter circuit unit is controlled, running safety of a three-phase power grid and personal safety are effectively ensured, and damage of the grid-connected inverter is prevented.
Description
Technical field
The utility model relates to the technical field of generating electricity by way of merging two or more grid systems, and especially relates to a kind of on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter.
Background technology
Serious day by day along with the sustainable growth of world energy sources demand and problem of environmental pollution taps a new source of energy and regenerative resource receives the attention of countries in the world.New forms of energy such as sun power, wind energy are the green clean energy resourcies that can utilize on a large scale at present, and the technology of generating electricity by way of merging two or more grid systems of carrying out new forms of energy such as sun power, wind energy has great social significance and economic implications.
The Technology Need combining inverter that generates electricity by way of merging two or more grid systems of new forms of energy such as sun power, wind energy carries out the conversion of direct current and alternating current; Be provided with the switch that is incorporated into the power networks in the combining inverter; Realize the reliability service that generates electricity by way of merging two or more grid systems, the on off state testing circuit that is incorporated into the power networks be set in the combining inverter reliability of the switch that is incorporated into the power networks is detected that the existing on off state testing circuit that is incorporated into the power networks is complicated; Detecting reliability is lower; If combining inverter itself breaks down, main electrical network breaks down or the situation of island effect, combining inverter can not break off and being connected of main electrical network effectively, can cause the generation of infringement, power grid security accident and the personal safety accident of combining inverter.
Summary of the invention
The utility model is to be directed against the on off state detection system that is incorporated into the power networks that the technological defective that exists of above-mentioned background provides a kind of effective assurance safe operation of electric network, personal safety and prevents the three-phase grid-connected inverter of combining inverter damage.
For realizing above-mentioned purpose; The utility model discloses a kind of on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter; It comprises inverter circuit unit, filtering circuit unit, on-off circuit unit, control circuit unit and testing circuit unit; Said inverter circuit unit output terminal connects said filtering circuit unit input end; Said on-off circuit unit one end is connected with said filtering circuit unit output terminal; The said on-off circuit unit other end is connected with the three phase network supply lines, and said control circuit unit input end is connected with said testing circuit unit, and said control circuit unit output terminal is connected with said inverter circuit unit input end and said on-off circuit unit.
Further; Said filtering circuit unit has filtering circuit unit U phase output terminal, filtering circuit unit V phase output terminal and filtering circuit unit W phase output terminal; Said three phase network supply lines comprises U phase supply lines, V phase supply lines and W phase supply lines; Said on-off circuit unit comprises U switch, V switch and the W switch that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually; Said U switch, V switch, W switch one end that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually is connected with said filtering circuit unit U phase output terminal, filtering circuit unit V phase output terminal and filtering circuit unit W phase output terminal respectively, and said U be incorporated into the power networks mutually switch and the W of switch, V that be incorporated into the power networks mutually is incorporated into the power networks mutually that supply lines, V phase supply lines and W phase supply lines connect the switch other end mutually with U respectively.
Further, said U switch, V switch and the W switch that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually is relay or contactor arrangement.
Further; Said testing circuit unit comprises U phase switch testing circuit, V phase switch testing circuit, W phase switch testing circuit; Said U phase switch testing circuit output terminal, V phase switch testing circuit output terminal, W phase switch testing circuit output terminal connect said control circuit unit input end respectively; Said U phase switch testing circuit positive input terminal is connected with said filtering circuit unit U phase output terminal; Said V phase switch testing circuit positive input terminal is connected with said filtering circuit unit V phase output terminal; Said W phase switch testing circuit positive input terminal is connected with said filtering circuit unit W phase output terminal, and said U phase switch testing circuit, V phase switch testing circuit and W phase switch testing circuit negative input end are connected with zero line respectively.
Further; Said U phase switch testing circuit comprises first stake resistance, first current-limiting resistance, first divider resistance, first resistor group, first diode, first electric capacity and first photoelectrical coupler; The corresponding U phase of said first resistor group, one end switch testing circuit positive input terminal; Said first divider resistance, one end and first diode anode are connected with the said first resistor group other end; The said first divider resistance other end connects zero line, and said first capacitor anode and first current-limiting resistance, one end are connected with said first diode cathode, and said first capacitance cathode connects zero line; The said first current-limiting resistance other end is connected with the anode of said first photoelectrical coupler; The negative electrode of said first photoelectrical coupler connects zero line, and the collector of said first photoelectrical coupler is connected with direct current, and the emitter of said first photoelectrical coupler is connected with said first stake resistance, one end; The said first stake resistance other end ground connection, the corresponding said U phase switch testing circuit output terminal of the emitter of said first photoelectrical coupler.
Further, said first resistor group comprises first resistance, second resistance and the 3rd resistance, and said the 3rd resistance, second resistance and first resistance are connected in series each other.
Further; Said V phase switch testing circuit comprises second stake resistance, second current-limiting resistance, second divider resistance, second resistor group, second diode, second electric capacity and second photoelectrical coupler; The corresponding V phase of said second resistor group, one end switch testing circuit positive input terminal; Said second divider resistance, one end and second diode anode are connected with the said second resistor group other end; The said second divider resistance other end connects zero line, and said second capacitor anode and second current-limiting resistance, one end are connected with said second diode cathode, and said second capacitance cathode connects zero line; The said second current-limiting resistance other end is connected with the anode of said second photoelectrical coupler; The negative electrode of said second photoelectrical coupler connects zero line, and the collector of said second photoelectrical coupler is connected with direct current, and the emitter of said second photoelectrical coupler is connected with said second stake resistance, one end; The said second stake resistance other end ground connection, the corresponding said V phase switch testing circuit output terminal of the emitter of said second photoelectrical coupler.
Further, said second resistor group comprises the 4th resistance, the 5th resistance and the 6th resistance, and said the 6th resistance, the 5th resistance and the 4th resistance are connected in series each other.
Further; Said W phase switch testing circuit comprises the 3rd stake resistance, the 3rd current-limiting resistance, the 3rd divider resistance, the 3rd resistor group, the 3rd diode, the 3rd electric capacity and the 3rd photoelectrical coupler; The corresponding W phase of said the 3rd resistor group one end switch testing circuit positive input terminal; Said the 3rd divider resistance one end and the 3rd diode anode are connected with said the 3rd resistor group other end; Said the 3rd divider resistance other end connects zero line, and said the 3rd capacitor anode and the 3rd current-limiting resistance one end are connected with said the 3rd diode cathode, and said the 3rd capacitance cathode connects zero line; Said the 3rd current-limiting resistance other end is connected with the anode of said the 3rd photoelectrical coupler; The negative electrode of said the 3rd photoelectrical coupler connects zero line, and the collector of said the 3rd photoelectrical coupler is connected with direct current, and the emitter of said the 3rd photoelectrical coupler is connected with said the 3rd stake resistance one end; Said the 3rd stake resistance other end ground connection, the corresponding said W phase switch testing circuit output terminal of the emitter of said the 3rd photoelectrical coupler.
Further, said the 3rd resistor group comprises the 7th resistance, the 8th resistance and the 9th resistance, and said the 9th resistance, the 8th resistance and the 7th resistance are connected in series each other.
In sum; The on off state detection system that is incorporated into the power networks of the utility model three-phase grid-connected inverter receives and analyzes the level signal that said testing circuit unit sends through control circuit unit is set; Whether the break function of detector switch circuit unit and closure function be normal; And then the duty of control inverter circuit unit, effectively guarantee safe operation of electric network, personal safety and prevent the damage of combining inverter.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the schematic diagram of the utility model U phase switch testing circuit shown in Figure 1.
Fig. 3 is the schematic diagram of the utility model V phase switch testing circuit shown in Figure 1.
Fig. 4 is the schematic diagram of the utility model W phase switch testing circuit shown in Figure 1.
Embodiment
For further understanding characteristic, technological means and the specific purposes that reached, the function of the utility model, the utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
See also Fig. 1 to Fig. 4; The on off state detection system that is incorporated into the power networks of the utility model three-phase grid-connected inverter comprises inverter circuit unit 10, filtering circuit unit 20, on-off circuit unit 30, control circuit unit 40 and testing circuit unit 50; Said inverter circuit unit 10 output terminals connect said filtering circuit unit 20 input ends, and said filtering circuit unit 20 has filtering circuit unit U phase output terminal 21, filtering circuit unit V phase output terminal 22 and filtering circuit unit W phase output terminal 23.
Said on-off circuit unit 30 is connected with three phase network 60 supply lines; Said three phase network 60 supply lines comprise U phase supply lines 61, V phase supply lines 62 and W phase supply lines 63; Said on-off circuit unit 30 comprises U switch 31, V switch 32 and the W switch 33 that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually; Said U switch 31, V switch 32 and the W switch 33 that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually is relay or contactor arrangement; Said U switch 31, V switch 32 and W switch 33 1 ends that are incorporated into the power networks mutually that are incorporated into the power networks mutually that are incorporated into the power networks mutually are connected with said filtering circuit unit U phase output terminal 21, filtering circuit unit V phase output terminal 22 and filtering circuit unit W phase output terminal 23 respectively, and said U switch 31, V switch 32 and W switch 33 other ends that are incorporated into the power networks mutually that are incorporated into the power networks mutually that are incorporated into the power networks mutually connect U phase supply lines 61, V phase supply lines 62 and W phase supply lines 63 break-make with U phase supply line, V phase supply line and the W phase supply line of control three phase network 60 respectively.
Said control circuit unit 40 input ends are connected with said testing circuit unit 50; With the level signal that the said testing circuit of receiving and analyzing unit 50 sends, the input control end of said control circuit unit 40 output terminals and said inverter circuit unit 10 input ends and said on-off circuit unit 30 connects to control said inverter circuit unit 10, U switch 31, V switch 32 and W switch 33 break-makes that are incorporated into the power networks mutually that are incorporated into the power networks mutually that are incorporated into the power networks mutually.
Said testing circuit unit 50 comprises U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53; Said U phase switch testing circuit 51 output terminals, V phase switch testing circuit 52 output terminals and W phase switch testing circuit 53 output terminals connect said control circuit unit 40 input ends respectively; Said U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53 circuit are identical; Said U phase switch testing circuit 51 positive input terminals mate the said U switch 31 that is incorporated into the power networks mutually and are connected with said filtering circuit unit U phase output terminal 21; Said V phase switch testing circuit 52 positive input terminals mate the said V switch 32 that is incorporated into the power networks mutually and are connected with said filtering circuit unit V phase output terminal 22; Said W phase switch testing circuit 53 positive input terminals mate the said W switch 33 that is incorporated into the power networks mutually and are connected with said filtering circuit unit W phase output terminal 23, and said U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53 negative input ends are connected with zero line N respectively.
Said U phase switch testing circuit 51 comprises the first stake resistance R100, the first current-limiting resistance R101, the first divider resistance R102, the first resistor group R10, the first diode D100, first capacitor C 100 and the first photoelectrical coupler U1; The said first resistor group R10 comprises first resistance R 103, second resistance R 104 and the 3rd resistance R 105; Said the 3rd resistance R 105, second resistance R 104 and first resistance R 103 are connected in series each other; The corresponding U phase of said the 3rd resistance R 105 1 ends switch testing circuit 51 positive input terminals; The said first divider resistance R102, one end and the first diode D100 anode are connected with said first resistance R, 103 1 ends; The said first divider resistance R102 other end connects zero line N; Said first capacitor C, 100 anodes and the first current-limiting resistance R101, one end are connected with the said first diode D100 negative electrode, and said first capacitor C, 100 negative electrodes connect zero line N, and the said first current-limiting resistance R101 other end is connected with the anode of the said first photoelectrical coupler U1; The negative electrode of the said first photoelectrical coupler U1 connects zero line N; The collector of the said first photoelectrical coupler U1 is connected with direct current VCC, and the emitter of the said first photoelectrical coupler U1 is connected with the said first stake resistance R100, one end, the said first stake resistance R100 other end ground connection; Corresponding said U phase switch testing circuit 51 output terminals of the emitter of the said first photoelectrical coupler U1, the model of the said first photoelectrical coupler U1 is TLP421.
Said V phase switch testing circuit 52 comprises the second stake resistance R200, the second current-limiting resistance R201, the second divider resistance R202, the second resistor group R20, the second diode D200, second capacitor C 200 and the second photoelectrical coupler U2; The said second resistor group R20 comprises the 4th resistance R 203, the 5th resistance R 204 and the 6th resistance R 205; Said the 6th resistance R 205, the 5th resistance R 204 and the 4th resistance R 203 are connected in series each other; The corresponding V phase of said the 6th resistance R 205 1 ends switch testing circuit 52 positive input terminals; The said second divider resistance R202, one end and the second diode D200 anode are connected with said the 4th resistance R 203 1 ends; The said second divider resistance R202 other end connects zero line N; Said second capacitor C, 200 anodes and the second current-limiting resistance R201, one end are connected with the said second diode D200 negative electrode, and said second capacitor C, 200 negative electrodes connect zero line N, and the said second current-limiting resistance R201 other end is connected with the anode of the said second photoelectrical coupler U2; The negative electrode of the said second photoelectrical coupler U2 connects zero line N; The collector of the said second photoelectrical coupler U2 is connected with direct current VCC, and the emitter of the said second photoelectrical coupler U2 is connected with the said second stake resistance R200, one end, the said second stake resistance R200 other end ground connection; Corresponding said V phase switch testing circuit 52 output terminals of the emitter of the said second photoelectrical coupler U2, the model of the said second photoelectrical coupler U2 is TLP421.
Said W phase switch testing circuit 53 comprises the 3rd stake resistance R300, the 3rd current-limiting resistance R301, the 3rd divider resistance R302, the 3rd resistor group R30, the 3rd diode D300, the 3rd capacitor C 300 and the 3rd photoelectrical coupler U3; Said the 3rd resistor group R30 comprises the 7th resistance R 303, the 8th resistance R 304 and the 9th resistance R 305; Said the 9th resistance R 305, the 8th resistance R 304 and the 7th resistance R 303 are connected in series each other; The corresponding W phase of said the 9th resistance R 305 1 ends switch testing circuit 53 positive input terminals; Said the 3rd divider resistance R302 one end and the 3rd diode D300 anode are connected with said the 7th resistance R 303 1 ends; Said the 3rd divider resistance R302 other end connects zero line N; Said the 3rd capacitor C 300 anodes and the 3rd current-limiting resistance R301 one end are connected with said the 3rd diode D300 negative electrode, and said the 3rd capacitor C 300 negative electrodes connect zero line N, and said the 3rd current-limiting resistance R301 other end is connected with the anode of said the 3rd photoelectrical coupler U3; The negative electrode of said the 3rd photoelectrical coupler U3 connects zero line N; The collector of said the 3rd photoelectrical coupler U3 is connected with direct current VCC, and the emitter of said the 3rd photoelectrical coupler U3 is connected with said the 3rd stake resistance R300 one end, said the 3rd stake resistance R300 other end ground connection; Corresponding said W phase switch testing circuit 53 output terminals of the emitter of said the 3rd photoelectrical coupler U3, the model of said the 3rd photoelectrical coupler U3 is TLP421.
Said U phase switch testing circuit 51 principle of work do; When said the 3rd resistance R 105 1 terminations are received the U phase supply lines voltage signal VoltU of three phase network 60; Said U phase supply lines voltage signal VoltU through the 3rd resistance R 105, second resistance R 104, first resistance R 103, the first divider resistance R102 dividing potential drop after; The U phase supply lines voltage signal VoltU of the said first diode D100 after to dividing potential drop carries out unidirectional rectification; Charging the carrying out accumulation of energy of said first capacitor C 100 two ends, the voltage signal after the rectification are through the conducting first photoelectrical coupler U1 after the current limliting of the first current-limiting resistance R101, and this moment, the emitter of the first photoelectrical coupler U1 was exported high level signal; When said the 3rd resistance R 105 1 ends do not receive the U phase supply lines voltage signal VoltU of three phase network 60, the emitter output low level signal of the said first photoelectrical coupler U1.
Because said U phase switch testing circuit 51, V phase switch testing circuit 52, W phase switch testing circuit 53 circuit are identical, said V phase switch testing circuit 52, said W phase switch testing circuit 53 principle of work are consistent with said U phase switch testing circuit 51 principle of work.When said the 6th resistance R 205 1 terminations are received the V phase supply lines voltage signal VoltV of three phase network 60, the emitter of said second photoelectrical coupler U2 output high level signal; When said the 6th resistance R 205 1 ends do not receive the V phase supply lines voltage signal VoltV of three phase network 60, the emitter output low level signal of the said first photoelectrical coupler U2.When said the 9th resistance R 305 1 terminations are received the W phase supply lines voltage signal VoltW of three phase network 60, the emitter of said the 3rd photoelectrical coupler U3 output high level signal; When said the 9th resistance R 305 1 ends do not receive the W phase supply lines voltage signal VoltW of three phase network 60, the emitter output low level signal of said the 3rd photoelectrical coupler U3.
When the utility model is implemented; Said control circuit unit 40 is at first controlled said inverter circuit unit 10 and is quit work; At this moment; Said control circuit unit 40 is sent cut-off switch instruction, and whether the break function that detects said on-off circuit unit 30 is normal, and said control circuit unit 40 receives the level signal that said U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53 send and analyzes; When the output of said U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53 was low level signal, the break function of said on-off circuit unit 30 was normal; When said U phase switch testing circuit 51, V phase switch testing circuit 52 or W phase switch testing circuit 53 were output as high level signal, the break function of said on-off circuit unit 30 broke down.
Said control circuit unit 40 is sent the Closing Switch instruction; Whether the closure function that detects said on-off circuit unit 30 is normal; Said control circuit unit 40 receives the level signal that said U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53 send and analyzes; When the output of said U phase switch testing circuit 51, V phase switch testing circuit 52 and W phase switch testing circuit 53 was high level signal, the closure function of said on-off circuit unit 30 was normal; When said U phase switch testing circuit 51, V phase switch testing circuit 52 or W phase switch testing circuit 53 were output as low level signal, the closure function of said on-off circuit unit 30 broke down.
The break function of said on-off circuit unit 30 and closure function all just often, start working in the said inverter circuit of said control circuit unit 40 controls unit 10; When the break function of said on-off circuit unit 30 or closure function broke down, the said inverter circuit of said control circuit unit 40 controls unit 10 continued to quit work, and said control circuit unit 40 control alarms send failure alarm signal.
In sum; The on off state detection system that is incorporated into the power networks of the utility model three-phase grid-connected inverter receives and analyzes the level signal that said testing circuit unit 50 sends through control circuit unit 40 is set; Whether the break function of detector switch circuit unit 30 and closure function be normal; And then the duty of control inverter circuit unit 10, effectively guarantee safe operation of electric network, personal safety and prevent the damage of combining inverter.
The above embodiment has only expressed a kind of embodiment of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model scope.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with accompanying claims.
Claims (10)
1. the on off state detection system that is incorporated into the power networks of a three-phase grid-connected inverter; Comprise inverter circuit unit (10), filtering circuit unit (20), on-off circuit unit (30) and testing circuit unit (50); Said inverter circuit unit (10) output terminal connects said filtering circuit unit (20) input end; Said on-off circuit unit (30) one ends are connected with said filtering circuit unit (20) output terminal; Said on-off circuit unit (30) other end is connected with three phase network (60) supply lines; It is characterized in that: also comprise control circuit unit (40), said control circuit unit (40) input end is connected with said testing circuit unit (50), and said control circuit unit (40) output terminal is connected with said inverter circuit unit (10) input end and said on-off circuit unit (30).
2. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 1; It is characterized in that: said filtering circuit unit (20) has filtering circuit unit U phase output terminal (21), filtering circuit unit V phase output terminal (22) and filtering circuit unit W phase output terminal (23); Said three phase network (60) supply lines comprises U phase supply lines (61), V phase supply lines (62) and W phase supply lines (63); Said on-off circuit unit (30) comprises U switch (31), V switch (32) and the W switch (33) that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually; Said U switch (31), V switch (32), W switch (33) one ends that are incorporated into the power networks mutually that are incorporated into the power networks mutually that are incorporated into the power networks mutually are connected with said filtering circuit unit U phase output terminal (21), filtering circuit unit V phase output terminal (22) and filtering circuit unit W phase output terminal (23) respectively, and said U be incorporated into the power networks mutually switch (32) and the W of switch (31), V that be incorporated into the power networks mutually is incorporated into the power networks mutually that supply lines (61), V phase supply lines (62) and W phase supply lines (63) connect switch (33) other end mutually with U respectively.
3. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 2 is characterized in that: said U switch (31), V switch (32) and the W switch (33) that is incorporated into the power networks mutually that is incorporated into the power networks mutually that is incorporated into the power networks mutually is relay or contactor arrangement.
4. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 1; It is characterized in that: said testing circuit unit (50) comprises U phase switch testing circuit (51), V phase switch testing circuit (52), W phase switch testing circuit (53); Said U phase switch testing circuit (51) output terminal, V phase switch testing circuit (52) output terminal, W phase switch testing circuit (53) output terminal connect said control circuit unit (40) input end respectively; Said U phase switch testing circuit (51) positive input terminal is connected with said filtering circuit unit U phase output terminal (21); Said V phase switch testing circuit (52) positive input terminal is connected with said filtering circuit unit V phase output terminal (22); Said W phase switch testing circuit (53) positive input terminal is connected with said filtering circuit unit W phase output terminal (23), and said U phase switch testing circuit (51), V phase switch testing circuit (52) and W phase switch testing circuit (53) negative input end are connected with zero line (N) respectively.
5. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 4; It is characterized in that: said U phase switch testing circuit (51) comprises first stake resistance (R100), first current-limiting resistance (R101), first divider resistance (R102), first resistor group (R10), first diode (D100), first electric capacity (C100) and first photoelectrical coupler (U1); Corresponding U phase switch testing circuit (51) positive input terminal of said first resistor group (R10) end; Said first divider resistance (R102) end and first diode (D100) anode are connected with said first resistor group (R10) other end; Said first divider resistance (R102) other end connects zero line (N); Said first electric capacity (C100) anode and first current-limiting resistance (R101) end are connected with said first diode (D100) negative electrode; Said first electric capacity (C100) negative electrode connects zero line (N); Said first current-limiting resistance (R101) other end is connected with the anode of said first photoelectrical coupler (U1); The negative electrode of said first photoelectrical coupler (U1) connects zero line (N), and the collector of said first photoelectrical coupler (U1) is connected with direct current (VCC), and the emitter of said first photoelectrical coupler (U1) is connected with said first stake resistance (R100) end; Said first stake resistance (R100) other end ground connection, corresponding said U phase switch testing circuit (51) output terminal of the emitter of said first photoelectrical coupler (U1).
6. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 5; It is characterized in that: said first resistor group (R10) comprises first resistance (R103), second resistance (R104) and the 3rd resistance (R105), and said the 3rd resistance (R105), second resistance (R104) and first resistance (R103) is serial connection each other.
7. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 4; It is characterized in that: said V phase switch testing circuit (52) comprises second stake resistance (R200), second current-limiting resistance (R201), second divider resistance (R202), second resistor group (R20), second diode (D200), second electric capacity (C200) and second photoelectrical coupler (U2); Corresponding V phase switch testing circuit (52) positive input terminal of said second resistor group (R20) end; Said second divider resistance (R202) end and second diode (D200) anode are connected with said second resistor group (R20) other end; Said second divider resistance (R202) other end connects zero line (N); Said second electric capacity (C200) anode and second current-limiting resistance (R201) end are connected with said second diode (D200) negative electrode; Said second electric capacity (C200) negative electrode connects zero line (N); Said second current-limiting resistance (R201) other end is connected with the anode of said second photoelectrical coupler (U2); The negative electrode of said second photoelectrical coupler (U2) connects zero line (N), and the collector of said second photoelectrical coupler (U2) is connected with direct current (VCC), and the emitter of said second photoelectrical coupler (U2) is connected with said second stake resistance (R200) end; Said second stake resistance (R200) other end ground connection, corresponding said V phase switch testing circuit (52) output terminal of the emitter of said second photoelectrical coupler (U2).
8. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 7; It is characterized in that: said second resistor group (R20) comprises the 4th resistance (R203), the 5th resistance (R204) and the 6th resistance (R205), and said the 6th resistance (R205), the 5th resistance (R204) and the 4th resistance (R203) is serial connection each other.
9. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 4; It is characterized in that: said W phase switch testing circuit (53) comprises the 3rd stake resistance (R300), the 3rd current-limiting resistance (R301), the 3rd divider resistance (R302), the 3rd resistor group (R30), the 3rd diode (D300), the 3rd electric capacity (C300) and the 3rd photoelectrical coupler (U3); Corresponding W phase switch testing circuit (53) positive input terminal of said the 3rd resistor group (R30) end; Said the 3rd divider resistance (R302) end and the 3rd diode (D300) anode are connected with said the 3rd resistor group (R30) other end; Said the 3rd divider resistance (R302) other end connects zero line (N); Said the 3rd electric capacity (C300) anode and the 3rd current-limiting resistance (R301) end are connected with said the 3rd diode (D300) negative electrode; Said the 3rd electric capacity (C300) negative electrode connects zero line (N); Said the 3rd current-limiting resistance (R301) other end is connected with the anode of said the 3rd photoelectrical coupler (U3); The negative electrode of said the 3rd photoelectrical coupler (U3) connects zero line (N), and the collector of said the 3rd photoelectrical coupler (U3) is connected with direct current (VCC), and the emitter of said the 3rd photoelectrical coupler (U3) is connected with said the 3rd stake resistance (R300) end; Said the 3rd stake resistance (R300) other end ground connection, corresponding said W phase switch testing circuit (53) output terminal of the emitter of said the 3rd photoelectrical coupler (U3).
10. the on off state detection system that is incorporated into the power networks of three-phase grid-connected inverter according to claim 9; It is characterized in that: said the 3rd resistor group (R30) comprises the 7th resistance (R303), the 8th resistance (R304) and the 9th resistance (R305), and said the 9th resistance (R305), the 8th resistance (R304) and the 7th resistance (R303) is serial connection each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204510043U CN202330646U (en) | 2011-11-15 | 2011-11-15 | Grid-connected switch state detecting system of three-phase grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204510043U CN202330646U (en) | 2011-11-15 | 2011-11-15 | Grid-connected switch state detecting system of three-phase grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330646U true CN202330646U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204510043U Expired - Fee Related CN202330646U (en) | 2011-11-15 | 2011-11-15 | Grid-connected switch state detecting system of three-phase grid-connected inverter |
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| CN (1) | CN202330646U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363000A (en) * | 2018-01-23 | 2018-08-03 | 艾思玛新能源技术（上海）有限公司苏州高新区分公司 | A kind of abatement detecting method of inverter repeat circuit |
| WO2020097797A1 (en) * | 2018-11-13 | 2020-05-22 | 深圳威迈斯新能源股份有限公司 | Insulation detection circuit of vehicle-mounted bidirectional charger and detection method therefor |
| CN113162383A (en) * | 2021-04-26 | 2021-07-23 | 深圳芯能半导体技术有限公司 | Motor control circuit, motor controller and frequency converter |
| US11604217B2 (en) | 2018-11-13 | 2023-03-14 | Shenzhen Vmax New Energy Co., Ltd. | Insulation detection circuit and detection method thereof for two-way on-board charger |
-
2011
- 2011-11-15 CN CN2011204510043U patent/CN202330646U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363000A (en) * | 2018-01-23 | 2018-08-03 | 艾思玛新能源技术（上海）有限公司苏州高新区分公司 | A kind of abatement detecting method of inverter repeat circuit |
| WO2020097797A1 (en) * | 2018-11-13 | 2020-05-22 | 深圳威迈斯新能源股份有限公司 | Insulation detection circuit of vehicle-mounted bidirectional charger and detection method therefor |
| US11604217B2 (en) | 2018-11-13 | 2023-03-14 | Shenzhen Vmax New Energy Co., Ltd. | Insulation detection circuit and detection method thereof for two-way on-board charger |
| CN113162383A (en) * | 2021-04-26 | 2021-07-23 | 深圳芯能半导体技术有限公司 | Motor control circuit, motor controller and frequency converter |
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Granted publication date: 20120711 Termination date: 20161115 |