CN104539043A - Automatic-switching device system and method of standby power source - Google Patents

Abstract

The invention discloses an automatic-switching device system and method of a standby power source. According to the automatic-switching device system and method of the standby power source, the safety performance is high, faults of a bus are automatically judged, corresponding action strategies are executed according to fault point positions, the faults are isolated, and power supplying is recovered. The automatic-switching device system comprises an inlet wire M, an inlet wire N, the bus, a standby power source automatic-switching device and a segment combining unit, wherein the inlet wire M and the inlet wire N are connected with the bus, the bus is connected with the segment combining unit, the segment combining unit is connected with a collecting plate, and the collecting plate is connected with a protection plate and a management plate. The suitable running mode of an LBZT1 is that the inlet wire M serves as a standby, the inlet wire N runs and a segment switch serves as a standby. The suitable running mode of an FBZT is that the inlet wire M runs, the inlet wire N runs and the segment switch serves as a standby. By means of the automatic-switching device system and method, the safety performance of the device is improved, and power supplying can be recovered.

Description

A kind of automatic switching device of standby power supply system and haul oneself willingly into method

Technical field

The present invention relates to electric power facility field, particularly relate to a kind of automatic switching device of standby power supply system and haul oneself willingly into method.

Background technology

When traditional automatic switching device of standby power supply is applied to 110kV single-trunk segmental wiring form electric substation; when bus generation permanent fault; because 110kV bus does not generally configure the protection of special mother line; transform er differential protection scope does not comprise 110kV bus yet, and busbar fault will be excised by supply line's mains side relaying protection action, automatic closing device action after bus loss of pressure; stand-by power supply circuit closes in fault; relaying protection action excision fault, will cause full institute of electric substation dead electricity, as shown in Figure 5:

(1) when operational mode is power supply one UL1, power supply two UL2, II female power supply female to I respectively, segmentation 3DL switch is for subsequent use, automatic switching device of standby power supply is segmentation when hauling oneself willingly into mode: permanent fault occurs I mother, the 11DL switch relaying protection action of power supply 1 side, tripping 11DL, overlaps and does not become tripping 11DL again; The female decompression of I and 1DL switch, without stream, meet automatic switching device of standby power supply starting conditions, automatic switching device of standby power supply action, jump 1DL, close 3DL.Now namely power supply 2 side 21DL switch protective relaying device experiences fault, tripping 21DL after action, full institute of this electric substation dead electricity.

(2) when operational mode is, the II female power supply female to I respectively of power supply 1, power supply 2, segmentation 3DL switch is for subsequent use, automatic switching device of standby power supply is segmentation when hauling oneself willingly into mode: permanent fault occurs II mother, the 21DL switch relaying protection action of power supply 2 side, tripping 21DL, overlaps and does not become tripping 21DL again; The female decompression of II and 2DL switch, without stream, meet automatic switching device of standby power supply starting conditions, automatic switching device of standby power supply action, jump 2DL, close 3DL.Now namely power supply 1 side 11DL switch protective relaying device experiences fault, tripping 11DL after action, full institute of this electric substation dead electricity.

(3) when operational mode is power supply 1 couple of I mother power supply, and through 3DL Switch Controller II mother power supply, 2DL switch stand-by heat, power supply 2 is to empty line charging, automatic switching device of standby power supply is inlet wire N when hauling oneself willingly into mode: permanent fault occurs I mother, the 11DL switch relaying protection action of power supply 1 side, tripping 11DL, overlaps and does not become tripping 11DL again; I is female, the female equal decompression of II and 1DL switch without stream, meet automatic switching device of standby power supply starting conditions, automatic switching device of standby power supply action, jump 1DL, close 2DL.Now namely power supply 2 side 21DL switch protective relaying device experiences fault, tripping 21DL after action, full institute of this electric substation dead electricity.

(4) when operational mode is power supply 1 couple of I mother power supply, and through 3DL Switch Controller II mother power supply, 2DL switch stand-by heat, power supply 2 is to empty line charging, automatic switching device of standby power supply is inlet wire N when hauling oneself willingly into mode: permanent fault occurs II mother, because 110kV circuit relay protection is generally adjusted for circuit principle by terminal feedback, i.e. quick-action section saves line sensitivity from damage, and block switch 3DL mono-general configuration charge protection, only automatically open (the current protection of 3DL switchgear distribution in short-term when switch is become co-bit from point position, must ensure that under little mode busbar fault has enough sensitivity, definite value often can not escape transformer excitation flow, or can not escape step down side fault under large mode, should not drop into for a long time), fault is still excised by mains side 11DL switch, I is female, the female all decompressions of II and 1DL switch are without stream, meet automatic switching device of standby power supply starting conditions, automatic switching device of standby power supply action, jump 1DL, close 2DL.Now namely power supply 2 side 21DL switch protective relaying device experiences fault, tripping 21DL after action, full institute of this electric substation dead electricity.

(5) when operational mode is power supply 2 couples of I mothers power supply, and through 3DL Switch Controller I mother power supply, 1DL switch stand-by heat, power supply 1 is to empty line charging, automatic switching device of standby power supply is inlet wire M when hauling oneself willingly into mode, as in above background technology as described in (3), (4).

According to above analysis, when traditional automatic switching device of standby power supply is applied to 110kV single-trunk segmental wiring electric substation, there is 110kV busbar fault, after bus loss of pressure, automatic closing device action closes in fault bus, causes the problem of full institute dead electricity." 10kV ~ 110 (66) kV route protection and servicing unit standardized designs specification " (Q/GDW766-2012) propose, and " 7.2.9 backup auto-activating device should have power supply automatic switching in the safeguard measure of fault bus or faulty equipment." for traditional transformer station; because automatic switching device of standby power supply analog quantity is opened into passage limited, 1DL, 2DL switch is general all only introduces a phase current, has done stream locking and has differentiated; can not differentiate busbar fault, device does not possess the function of throwing and taking safeguard measure after fault bus yet.

Summary of the invention

The present invention is directed to above problem, provide a kind of fail safe high, automatic discrimination busbar fault, and perform corresponding action policy according to position of failure point, isolated fault, the automatic switching device of standby power supply system restored electricity and haul oneself willingly into method.

Technical scheme of the present invention is: comprise inlet wire M, inlet wire N, bus, automatic switching device of standby power supply and segmentation merge cells, and described inlet wire M is connected described bus respectively with inlet wire N, and described bus connects described segmentation merge cells;

Described inlet wire M comprises power circuit one, circuit pressure change one PT1, current transformer one CT1, circuit breaker one 1DL and No. 1 inlet wire merge cells, described circuit pressure change one PT1 is accessed in one end of described power circuit one, the other end accesses described current transformer one CT1, described circuit breaker one 1DL accesses described current transformer one CT1, and described circuit pressure change one PT1 summation current transformer one CT1 accesses described No. 1 inlet wire merge cells respectively;

Described inlet wire N comprises power circuit two, circuit pressure change two PT2, current transformer two CT2, circuit breaker two 2DL and No. 2 inlet wire merge cells, described circuit pressure change two PT2 is accessed in one end of described power circuit two, the other end accesses described current transformer two CT2, described circuit breaker 2DL accesses described current transformer two CT2, and described circuit pressure change two PT2 summation current transformer two CT2 accesses described No. 2 inlet wire merge cellses respectively;

It is female that described bus comprises bus I, bus II is female, the female PT of bus voltage transformer one I, circuit breaker three 3DL, mother stream becomes CT3, bus voltage transformer two II female PT and 110KV voltage merge cells, one end of described bus mother I connects described circuit breaker one 1DL, the other end connects described circuit breaker three 3DL, one end of described bus mother II connects described circuit breaker two 2DL, the other end connects described mother stream and becomes CT3, described circuit breaker three 3DL becomes CT3 with described mother stream and is connected, the female PT of described bus voltage transformer one I, the female PT of bus voltage transformer two II and mother stream become CT3 and are incorporated to described 110KV voltage merge cells,

Described 110KV voltage merge cells connects described No. 1 inlet wire merge cells and No. 2 inlet wire merge cellses respectively, and described No. 1 inlet wire merge cells is all connected described automatic switching device of standby power supply with No. 2 inlet wire merge cellses;

Described segmentation merge cells connects collection plate, and described collection plate connects baffle and management board.

Automatic switching device of standby power supply system haul oneself willingly into a method,

1) operational mode that, inlet wire prepared auto restart LBZT1 is suitable for is: inlet wire M is for subsequent use, inlet wire N runs, block switch runs:

When A, bus loss of pressure, CT2 non-faulty current, fault point is not on bus:

A1), female all with no pressure, the UL1 of female, the II of I have pressure and IL2 without stream, UL1 is the voltage of power circuit one, and IL2 is the electric current of circuit breaker two 2DL, and 2DL is jumped in time delay, device sends simultaneously " LBZT1 jumps 2DL action " signal;

A2), confirm 2DL tripping after, regain 2DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; Send out 1DL closing pulse through time delay again, and send " LBZT1 closes 1DL action " signal;

A3), confirm that 1DL closes after, device sends " inlet wire M is bright for subsequent use " signal; If accelerated motion, then send out " the bright acceleration for subsequent use of inlet wire M " signal, LBZT1 logic completes;

A4), 2DL tripping operation, cut miscellaneous equipment, 1DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal;

When B, bus loss of pressure, CT2 have fault current and fault point on bus, after 3DL tripping operation, 2DL breaks down again electric current, and fault point is between at II, female or 2DL switch and stream become:

After LBZT1 charging complete:

B1), with no pressure, the UL1 of I, II mother has pressure and IL2 has fault current, opens into, then through time delay 3DL, device sends " LBZT jumps 3DL " signal simultaneously without No. 1 main transformer or No. 2 main transformer protection actuating signals;

B2), confirm 3DL tripping after, regain 3DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order;

B3) if, in time delay, IL2 breaks down again electric current, then send out and jump 2DL pulse, and send " LBZT1 jumps 2DL action " signal;

B4), confirm 2DL tripping after, device closes 1DL and 3DL command signal; And send " LBZT1 closes 2DL, 3DL action " signal, after confirming that 1DL, 3DL close, LBZT1 logic completes;

B5), 3DL tripping operation, cut miscellaneous equipment, 2DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal;

When C, bus loss of pressure, CT2 have fault current and fault point on bus, 2DL non-fault current always after 3DL tripping operation, fault point is the female or transient fault disappeared at I:

After LBZT1 charging complete:

C1), with no pressure, the UL1 of I, II mother has pressure and IL2 has failure flow, opens into, then through time delay 3DL, device sends " LBZT jumps 3DL " signal simultaneously without No. 1 main transformer or No. 2 main transformer protection actuating signals;

C2), confirm 3DL tripping after, regain 3DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order;

C3) if, in time delay, IL2 always without stream, then sends out and closes 1DL pulse, and sends " LBZT1 closes 1DL action " signal;

C4), confirm that 1DL closes after, LBZT1 logic completes;

C5), 3DL tripping operation, cut miscellaneous equipment, 1DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal;

2) operational mode that, segmentation prepared auto restart FBZT is suitable for is: inlet wire M runs, and inlet wire N runs, and block switch is for subsequent use, and FBZT2 is that mother II is secretly for subsequent use, and course of action is as follows:

After the female decompression of D, I, 1DL and 2DL does not all flow through fault current, and fault point is not on bus:

After FBZT charging complete:

D1), with no pressure, the II of mother I female have pressure and IL1 without stream, IL1 is the electric current of circuit breaker one 1DL, and start definite value drop into if close contact, also need to sentence 1DL and jump position, 1DL trip signal is sent out in time delay, sends out " FBZT2 jumps 1DL action " signal simultaneously;

D2), confirm 1DL tripping after, regain 1DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, send out " the female device action of I cut by FBZT2 connection " signal simultaneously, then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; 3DL closing pulse is sent out again, concurrent " FBZT closes 3DL action " signal through time delay;

D3), confirm that 3DL closes after, send out " mother II is secretly for subsequent use " signal, FBZT2 logic completes;

D4), 1DL tripping operation, cut miscellaneous equipment, after the order of 3DL combined floodgate sends 5s, circuit breaker is still not operating, then stop FBZT2 logic, and FBZT discharges, device sends " prepared auto restart failure " signal;

After the female decompression of E, I, 1DL flows through fault current, and 2DL does not flow through fault current, and fault point is between at I, female or 1DL switch and stream become:

After FBZT charging complete:

E1), with no pressure, the II of mother I is female has pressure and IL1 has fault current, without No. 1 main transformer actuating signal open into, start definite value drop into if close contact, also need to sentence 1DL and jump position, 1DL trip signal is sent out in time delay, sends out " FBZT2 jumps 1DL action " signal simultaneously;

E2), confirm 1DL tripping after, regain 1DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, send out " the female device action of I cut by FBZT2 connection " signal simultaneously, then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; 3DL closing pulse is sent out again, concurrent " FBZT closes 3DL action " signal through time delay;

E3), confirm that 3DL closes after, send out " mother II is secretly for subsequent use " signal;

E3-1), FBZT2 logic completes;

E3-2), accelerate motion, send out " the female dark acceleration for subsequent use of II " signal, FBZT2 logic completes;

E4), 1DL tripping operation, cut miscellaneous equipment, after the order of 3DL combined floodgate sends 5s, circuit breaker is still not operating, then stop FBZT2 logic, and FBZT discharges, device sends " prepared auto restart failure " signal.

The present invention is for Intelligent transformer station, three-phase current often back into line even comprises voltage, the three-phase electricity flow of block switch, all can change a road optical signal transmission into automatic switching device of standby power supply by merge cells, solve the restricted problem of analog input, thus analog quantity feature when can occur according to fault position to fault point, and take measures, locking automatic switching device of standby power supply or acceleration isolated fault, the fail safe of final raising equipment, can restore electricity.

Accompanying drawing explanation

Fig. 1 is flow chart of the present invention,

Fig. 2 is circuit diagram of the present invention,

Fig. 3 is inlet wire prepared auto restart logic diagram of the present invention,

Fig. 4 is bus prepared auto restart logic diagram of the present invention,

Fig. 5 is circuit diagram in background technology of the present invention;

Embodiment

The present invention as Figure 1-4, comprises inlet wire M, inlet wire N, bus, automatic switching device of standby power supply and segmentation merge cells, and described inlet wire M is connected described bus respectively with inlet wire N, and described bus connects described segmentation merge cells;

Described inlet wire M comprises power circuit one, circuit pressure change one PT1, current transformer one CT1, circuit breaker one 1DL and No. 1 inlet wire merge cells, described circuit pressure change one PT1 is accessed in one end of described power circuit one, the other end accesses described current transformer one CT1, described circuit breaker one 1DL accesses described current transformer one CT1, and described circuit pressure change one PT1 summation current transformer one CT1 accesses described No. 1 inlet wire merge cells respectively;

Described inlet wire N comprises power circuit two, circuit pressure change two PT2, current transformer two CT2, circuit breaker two 2DL and No. 2 inlet wire merge cells, described circuit pressure change two PT2 is accessed in one end of described power circuit two, the other end accesses described current transformer two CT2, described circuit breaker 2DL accesses described current transformer two CT2, and described circuit pressure change two PT2 summation current transformer two CT2 accesses described No. 2 inlet wire merge cellses respectively;

It is female that described bus comprises bus I, bus II is female, the female PT of bus voltage transformer one I, circuit breaker three 3DL, mother stream becomes CT3, bus voltage transformer two II female PT and 110KV voltage merge cells, one end of described bus mother I connects described circuit breaker one 1DL, the other end connects described circuit breaker three 3DL, one end of described bus mother II connects described circuit breaker two 2DL, the other end connects described mother stream and becomes CT3, described circuit breaker three 3DL becomes CT3 with described mother stream and is connected, the female PT of described bus voltage transformer one I, the female PT of bus voltage transformer two II and mother stream become CT3 and are incorporated to described 110KV voltage merge cells,

Described 110KV voltage merge cells connects described No. 1 inlet wire merge cells and No. 2 inlet wire merge cellses respectively, and described No. 1 inlet wire merge cells is all connected described automatic switching device of standby power supply with No. 2 inlet wire merge cellses;

By the electric current of inlet wire M and voltage are accessed No. 1 inlet wire merge cells, the electric current of inlet wire N and voltage access No. 2 inlet wire merge cellses, the electric current of bus and voltage access 110KV voltage merge cells, and analog quantity is converted into digital quantity and accesses No. 1 inlet wire merge cells and No. 2 inlet wire merge cellses respectively, then give automatic switching device of standby power supply by No. 1 inlet wire merge cells and No. 2 inlet wire merge cellses by signal.

Described segmentation merge cells connects collection plate; described collection plate connects baffle and management board; send SV data to the collection plate of PRS-7358 device by circuit and segmentation merge cells, completed collection and the calculating of of ac by described collection plate, send data to described baffle and management board.

Described collection plate adopts WB8290 model.

A kind of automatic switching device of standby power supply system to haul oneself willingly into method as follows:

(1) operational mode that, inlet wire prepared auto restart LBZT1 is suitable for is: inlet wire M is for subsequent use, inlet wire N runs, block switch runs:

When A, bus loss of pressure, CT2 non-faulty current, fault point is not on bus:

(A1), female all with no pressure, the UL1 of female, the II of I have pressure (when sentencing inlet wire and having compression set value to exit without this condition) and IL2 without stream, UL1 is the voltage of power circuit one, IL2 is the electric current of circuit breaker two 2DL, (when closing contact and starting definite value input, also need to sentence 2DL and jump position), time delay (if any acceleration BZT open into, then without time delay) jump 2DL, device sends simultaneously " LBZT1 jump 2DL action " signal;

(A2), confirm 2DL tripping after, regain 2DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment (as small power supply interconnection or ground connection become) order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; Send out 1DL closing pulse through time delay again, and send " LBZT1 closes 1DL action " signal;

(A3), confirm that 1DL closes after, device sends " inlet wire M is bright for subsequent use " signal; If accelerated motion, then send out " the bright acceleration for subsequent use of inlet wire M " signal, LBZT1 logic completes;

(A4), 2DL tripping operation, cut miscellaneous equipment, 1DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal.

When B, bus loss of pressure, CT2 have fault current and fault point on bus, after 3DL tripping operation, 2DL breaks down again electric current, and fault point is between at II, female or 2DL switch and stream become:

After LBZT1 charging complete:

(B1), I, II mother is with no pressure, UL1 has pressure (when sentencing inlet wire and having compression set value to exit without this condition) and IL2 has fault current, without No. 1 main transformer or No. 2 main transformer protection actuating signals open into, (when closing contact and starting definite value input, also need to sentence and jump position), then through time delay (if any acceleration BZT open into, then without time delay) 3DL (note: this time delay should be less than 21DL reclosing operate time), device sends simultaneously " LBZT jumps 3DL " signal;

(B2), confirm 3DL tripping after, regain 3DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment (as small power supply interconnection or ground connection become) order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order;

(B3) if, in time delay, IL2 breaks down again electric current (note: this time delay should be greater than 21DL reclosing operate time), then send out and jump 2DL pulse, and send " LBZT1 jumps 2DL action " signal; (after offside reclosing, IL2 has stream again, illustrates that nature of trouble is permanent fault, and fails isolated fault after 3DL tripping, and the position that now fault point is possible should between at II, female or 2DL switch and stream become; )

(B4), confirm 2DL tripping after, device closes 1DL and 3DL command signal; And send " LBZT1 closes 2DL, 3DL action " signal, after confirming that 1DL, 3DL close, LBZT1 logic completes; (note: if fault point is between 2DL switch and stream become, 2DL tripping gets final product isolated fault, recovers the power supply to two sections of buses after 1DL, 3DL close; As fault point is female at II; fault current can be perceived immediately after 1DL, 3DL close; now accelerated motion is protected to jump 3DL by 1DL switch over-current; the 11DL switch of 1 line mains side is owing to also perceiving the action simultaneously of fault current possibility; remedy by reclosing; this electric substation's mode final is that 1 line is female for I, the female fault dead electricity of II.When the reason of accelerated motion can not be protected to be fault point between 3DL switch and stream become by 3DL switch over-current, 3DL overcurrent protection can not correct operation; )

(B5), 3DL tripping operation, cut miscellaneous equipment, 2DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal.

When C, bus loss of pressure, CT2 have fault current and fault point on bus, 2DL non-fault current always after 3DL tripping operation, fault point is the female or transient fault disappeared at I:

After LBZT1 charging complete:

(C1), I, II mother is with no pressure, UL1 has pressure (when sentencing inlet wire and having compression set value to exit without this condition) and IL2 has failure flow, without No. 1 main transformer or No. 2 main transformer protection actuating signals open into, (when closing contact and starting definite value input, also need to sentence and jump position), then through time delay (if any acceleration BZT open into, then without time delay) 3DL (note: this time delay should be less than 21DL reclosing operate time), device sends simultaneously " LBZT jumps 3DL " signal;

(C2), confirm 3DL tripping after, regain 3DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment (as small power supply interconnection or ground connection become) order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order;

(C3), in time delay (this time delay be greater than 21DL reclosing operate time) if IL2 is always without stream, then sends out and close 1DL pulse, and send " LBZT1 closes 1DL action " signal; (2DL stream becomes always without stream, illustrates that fault is transient fault and fault point disappears; Or fault point is female at I, is isolated by 3DL.If the transient fault disappeared, after the 1DL that closes, this electric substation's operational mode is 2 present confession respectively back into line, two sections of buses all not dead electricity; If fault is still put at I female, excise fault by 1 line source-side switches 11DL, it is female for II that this electric substation's mode becomes 2 lines, the female fault dead electricity of I; )

(C4), confirm that 1DL closes after, LBZT1 logic completes;

(C5), 3DL tripping operation, cut miscellaneous equipment, 1DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal.

The operational mode that inlet wire prepared auto restart LBZT2 is suitable for is: inlet wire N is for subsequent use, inlet wire M runs, block switch runs, the operational mode that principle is suitable for LBZT1.

(2) operational mode that, segmentation prepared auto restart FBZT is suitable for is: inlet wire M runs, and inlet wire N runs, and block switch is for subsequent use, and FBZT2 is that mother II is secretly for subsequent use, and course of action is as follows:

After the female decompression of D, I, 1DL and 2DL does not all flow through fault current, and fault point is not on bus:

After FBZT charging complete:

(D1), with no pressure, the II of mother I female have pressure and IL1 without stream, IL1 is the electric current of circuit breaker one 1DL, and start definite value drop into if close contact, also need to sentence 1DL and jump position, 1DL trip signal is sent out in time delay, sends out " FBZT2 jumps 1DL action " signal simultaneously;

(D2), confirm 1DL tripping after, regain 1DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment (as small power supply interconnection or ground connection become) order, send out " the female device action of I cut by FBZT2 connection " signal simultaneously, then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; 3DL closing pulse is sent out again, concurrent " FBZT closes 3DL action " signal through time delay;

(D3), confirm that 3DL closes after, send out " mother II is secretly for subsequent use " signal, FBZT2 logic completes;

(D4), 1DL tripping operation, cut miscellaneous equipment, after the order of 3DL combined floodgate sends 5s, circuit breaker is still not operating, then stop FBZT2 logic, and FBZT discharges, device sends " prepared auto restart failure " signal.

After the female decompression of E, I, 1DL flows through fault current, and 2DL does not flow through fault current, and fault point is between at I, female or 1DL switch and stream become:

After FBZT charging complete:

(E1), with no pressure, the II of mother I is female has pressure and IL1 has fault current, without No. 1 main transformer actuating signal open into, if close contact to start definite value input, also need to sentence 1DL and jump position, 1DL trip signal (this time delay hide circuit offside reclosing operate time) is sent out in time delay, sends out " FBZT2 jumps 1DL action " signal simultaneously;

(E2), confirm 1DL tripping after, regain 1DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment (as small power supply interconnection or ground connection become) order, send out " the female device action of I cut by FBZT2 connection " signal simultaneously, then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; 3DL closing pulse is sent out again, concurrent " FBZT closes 3DL action " signal through time delay;

(E3), confirm that 3DL closes after, send out " mother II is secretly for subsequent use " signal;

(E3-1), FBZT2 logic completes; (note: fault point is between 1DL switch and stream become, and after prepared auto restart action, this electric substation's operational mode becomes 2 lines for I, II mother)

(E3-2), accelerate motion, send out " the female dark acceleration for subsequent use of II " signal, FBZT2 logic completes; (note: fault point is female at I, jump 3DL switch with 3DL switch changed position information opening 2DL switch over-current protection accelerated motion after 3DL closes, it is female for II that this electric substation's operational mode becomes 2 lines, the female fault dead electricity of I)

(E4), 1DL tripping operation, cut miscellaneous equipment, after the order of 3DL combined floodgate sends 5s, circuit breaker is still not operating, then stop FBZT2 logic, and FBZT discharges, device sends " prepared auto restart failure " signal.

Claims (2)

1. an automatic switching device of standby power supply system, is characterized in that, comprises inlet wire M, inlet wire N, bus, automatic switching device of standby power supply and segmentation merge cells, and described inlet wire M is connected described bus respectively with inlet wire N, and described bus connects described segmentation merge cells;

Described inlet wire M comprises power circuit one, circuit pressure change one PT1, current transformer one CT1, circuit breaker one 1DL and No. 1 inlet wire merge cells, described circuit pressure change one PT1 is accessed in one end of described power circuit one, the other end accesses described current transformer one CT1, described circuit breaker one 1DL accesses described current transformer one CT1, and described circuit pressure change one PT1 summation current transformer one CT1 accesses described No. 1 inlet wire merge cells respectively;

Described inlet wire N comprises power circuit two, circuit pressure change two PT2, current transformer two CT2, circuit breaker two 2DL and No. 2 inlet wire merge cells, described circuit pressure change two PT2 is accessed in one end of described power circuit two, the other end accesses described current transformer two CT2, described circuit breaker 2DL accesses described current transformer two CT2, and described circuit pressure change two PT2 summation current transformer two CT2 accesses described No. 2 inlet wire merge cellses respectively;

It is female that described bus comprises bus I, bus II is female, the female PT of bus voltage transformer one I, circuit breaker three 3DL, mother stream becomes CT3, bus voltage transformer two II female PT and 110KV voltage merge cells, one end of described bus mother I connects described circuit breaker one 1DL, the other end connects described circuit breaker three 3DL, one end of described bus mother II connects described circuit breaker two 2DL, the other end connects described mother stream and becomes CT3, described circuit breaker three 3DL becomes CT3 with described mother stream and is connected, the female PT of described bus voltage transformer one I, the female PT of bus voltage transformer two II and mother stream become CT3 and are incorporated to described 110KV voltage merge cells,

Described 110KV voltage merge cells connects described No. 1 inlet wire merge cells and No. 2 inlet wire merge cellses respectively, and described No. 1 inlet wire merge cells is all connected described automatic switching device of standby power supply with No. 2 inlet wire merge cellses;

Described segmentation merge cells connects collection plate, and described collection plate connects baffle and management board.

2. automatic switching device of standby power supply system according to claim 1 haul oneself willingly into a method, it is characterized in that,

1) operational mode that, inlet wire prepared auto restart LBZT1 is suitable for is: inlet wire M is for subsequent use, inlet wire N runs, block switch runs:

When A, bus loss of pressure, CT2 non-faulty current, fault point is not on bus:

A1), female all with no pressure, the UL1 of female, the II of I have pressure and IL2 without stream, UL1 is the voltage of power circuit one, and IL2 is the electric current of circuit breaker two 2DL, and 2DL is jumped in time delay, device sends simultaneously " LBZT1 jumps 2DL action " signal;

A2), confirm 2DL tripping after, regain 2DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; Send out 1DL closing pulse through time delay again, and send " LBZT1 closes 1DL action " signal;

A3), confirm that 1DL closes after, device sends " inlet wire M is bright for subsequent use " signal; If accelerated motion, then send out " the bright acceleration for subsequent use of inlet wire M " signal, LBZT1 logic completes;

A4), 2DL tripping operation, cut miscellaneous equipment, 1DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal;

When B, bus loss of pressure, CT2 have fault current and fault point on bus, after 3DL tripping operation, 2DL breaks down again electric current, and fault point is between at II, female or 2DL switch and stream become:

After LBZT1 charging complete:

B1), with no pressure, the UL1 of I, II mother has pressure and IL2 has fault current, opens into, then through time delay 3DL, device sends " LBZT jumps 3DL " signal simultaneously without No. 1 main transformer or No. 2 main transformer protection actuating signals;

B2), confirm 3DL tripping after, regain 3DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order;

B3) if, in time delay, IL2 breaks down again electric current, then send out and jump 2DL pulse, and send " LBZT1 jumps 2DL action " signal;

B4), confirm 2DL tripping after, device closes 1DL and 3DL command signal; And send " LBZT1 closes 2DL, 3DL action " signal, after confirming that 1DL, 3DL close, LBZT1 logic completes;

B5), 3DL tripping operation, cut miscellaneous equipment, 2DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal;

When C, bus loss of pressure, CT2 have fault current and fault point on bus, 2DL non-fault current always after 3DL tripping operation, fault point is the female or transient fault disappeared at I:

After LBZT1 charging complete:

C1), with no pressure, the UL1 of I, II mother has pressure and IL2 has failure flow, opens into, then through time delay 3DL, device sends " LBZT jumps 3DL " signal simultaneously without No. 1 main transformer or No. 2 main transformer protection actuating signals;

C2), confirm 3DL tripping after, regain 3DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, sends " I/II female device action cut by LBZT1 connection " signal simultaneously; Then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order;

C3) if, in time delay, IL2 always without stream, then sends out and closes 1DL pulse, and sends " LBZT1 closes 1DL action " signal;

C4), confirm that 1DL closes after, LBZT1 logic completes;

C5), 3DL tripping operation, cut miscellaneous equipment, 1DL closes a floodgate, and that circuit breaker after 5s occurs is still not operating in order, then stop LBZT1 logic, LBZT discharges, device sends " prepared auto restart failure " signal;

2) operational mode that, segmentation prepared auto restart FBZT is suitable for is: inlet wire M runs, and inlet wire N runs, and block switch is for subsequent use, and FBZT2 is that mother II is secretly for subsequent use, and course of action is as follows:

After the female decompression of D, I, 1DL and 2DL does not all flow through fault current, and fault point is not on bus:

After FBZT charging complete:

D1), with no pressure, the II of mother I female have pressure and IL1 without stream, IL1 is the electric current of circuit breaker one 1DL, and start definite value drop into if close contact, also need to sentence 1DL and jump position, 1DL trip signal is sent out in time delay, sends out " FBZT2 jumps 1DL action " signal simultaneously;

D2), confirm 1DL tripping after, regain 1DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, send out " the female device action of I cut by FBZT2 connection " signal simultaneously, then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; 3DL closing pulse is sent out again, concurrent " FBZT closes 3DL action " signal through time delay;

D3), confirm that 3DL closes after, send out " mother II is secretly for subsequent use " signal, FBZT2 logic completes;

D4), 1DL tripping operation, cut miscellaneous equipment, after the order of 3DL combined floodgate sends 5s, circuit breaker is still not operating, then stop FBZT2 logic, and FBZT discharges, device sends " prepared auto restart failure " signal;

After the female decompression of E, I, 1DL flows through fault current, and 2DL does not flow through fault current, and fault point is between at I, female or 1DL switch and stream become:

After FBZT charging complete:

E1), with no pressure, the II of mother I is female has pressure and IL1 has fault current, without No. 1 main transformer actuating signal open into, start definite value drop into if close contact, also need to sentence 1DL and jump position, 1DL trip signal is sent out in time delay, sends out " FBZT2 jumps 1DL action " signal simultaneously;

E2), confirm 1DL tripping after, regain 1DL trip signal; If cut miscellaneous equipment definite value to drop into, then start after cutting working power and cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and is cut miscellaneous equipment order, send out " the female device action of I cut by FBZT2 connection " signal simultaneously, then check and join the whether tripping of the equipment cut, if in 5s, prepared auto restart is judged to be joined the equipment tripping of cutting, and namely regains and jumps miscellaneous equipment order; 3DL closing pulse is sent out again, concurrent " FBZT closes 3DL action " signal through time delay;

E3), confirm that 3DL closes after, send out " mother II is secretly for subsequent use " signal;

E3-1), FBZT2 logic completes;

E3-2), accelerate motion, send out " the female dark acceleration for subsequent use of II " signal, FBZT2 logic completes;

E4), 1DL tripping operation, cut miscellaneous equipment, after the order of 3DL combined floodgate sends 5s, circuit breaker is still not operating, then stop FBZT2 logic, and FBZT discharges, device sends " prepared auto restart failure " signal.