CN105226805A - A kind of transformer station low-voltage system power source switching undisturbed control method - Google Patents

Abstract

The present invention discloses a kind of transformer station low-voltage system power source switching undisturbed control method, switching undisturbed control strategy is according to waveform relevance theory and instantaneous reactive power theory, adopt check power valve and mechanical chopper to combine to control, with the dual waveform of voltage and instantaneous active power of monitoring mains side and load-side, merge automatic paralleling technology, fast handoff technique, surge suppression technology and load monitoring technology on-line and the automatics researched and developed, realize the quick of double-fed line stand-by power supply, reliable switching, thus realize the continuity of electrical source exchange, ensure powered user can keep dead electricity after regaining power supply before the technological process of production be not damaged, normal production can be proceeded to greatest extent.

Description

A kind of transformer station low-voltage system power source switching undisturbed control method

Technical field

The present invention relates to prepared auto restart field, particularly relate to a kind of transformer station low-voltage system power source switching undisturbed control method.

Background technology

Traditional prepared auto restart is in order to ensure that stand-by power supply is not thrown on fault point, do not fall power transmission to stand-by power supply with working power, must disconnect (according to without stream criterion) and the complete no-voltage of working bus bar (according to criterion with no pressure) in confirmation working power after, could stand-by power supply be dropped into.

At present a large amount of " prepared auto restart " device used, the actual requirement that maybe can not meet system because switching time is long, logs off to the asynchronous motor of a large amount of operations of industrial and mining enterprises, technological process stage casing, impacts power quality.

Summary of the invention

In order to overcome above-mentioned deficiency of the prior art, the object of the invention is to, provide a kind of transformer station low-voltage system power source switching undisturbed control method, method comprises: manually startup switching mode in parallel; Described manual parallel connection starts switching mode and comprises:

Inlet wire one gives bussed supply, starts manually startup switching mode in parallel;

After the time delay through setting, judge whether satisfied switching condition in parallel;

If do not meet switching condition in parallel, handoff failure, system stops manually startup switching mode in parallel;

If meet switching condition in parallel, send and close 2QF instruction, after combined floodgate time delay, judge whether 2QF closes;

If after combined floodgate time delay, 2QF is not closed, handoff failure, system stops manually startup switching mode in parallel;

If after combined floodgate time delay, 2QF closes, and selects manual tripping 1QF or automatic tripping 1QF;

Select manual tripping 1QF, in tripping operation time delay, tripping 1QF, system completes switching;

Select automatic tripping 1QF, after tripping operation time delay, send tripping 1QF instruction, tripping 1QF, systematic evaluation completes;

If after tripping operation time delay, send tripping 1QF instruction, the non-tripping of 1QF, handoff failure, system tripping 2QF, system locking.

Preferably, method comprises: the switching mode while of manually; Described manual while switching mode comprise:

Inlet wire one gives bussed supply, manually switches startup simultaneously;

Send and jump 1QF instruction;

After switching combined floodgate time delay, judge whether quick switching drops into simultaneously, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 2QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 2QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 2QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 2QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops manually switching simultaneously;

Send after closing 2QF instruction, start and manually close delayer simultaneously, close 2QF after the time delay through setting;

If in the time delay of setting, 2QF is not closed, handoff failure, stop manually switching simultaneously;

Close in the time delay of setting after 2QF, start and manually drive delayer simultaneously, tripping 1QF after the time delay through setting, switching completes.

Preferably, method comprises: non-operating mode decompression starts switching mode; Described non-operating mode decompression starts switching mode and comprises:

Inlet wire one gives bussed supply, starts non-operating mode decompression and starts switching;

System sends tripping 1QF instruction;

Start series connection handoff delay device, after the time delay through series connection handoff delay device, adopt series connection to switch tripping 1QF;

After tripping 1QF, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 2QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 2QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 2QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 2QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After the setting time delay of 2QF delayer, closed 2QF, judges whether 1QF is tripping state simultaneously;

If 1QF is tripping state, then non-operating mode decompression startup switching completes.

Preferably, method comprises: non-power condition switch false tripping switching mode; Described non-power condition switch false tripping switching mode comprises:

When system no alarm, without locking, when being in normal operating condition, when the unexpected tripping of the 2QF being in normal co-bit being detected, system starts non-power condition switch false tripping switching mode;

Judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 1QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 1QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 1QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 1QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After the setting time delay through false tripping handoff delay device, close 1QF, non-power condition switch false tripping has switched.

Preferably, method comprises: decompression starts switching mode; Described decompression starts switching mode and comprises:

Inlet wire one voltage reduce, make inlet wire one maximum line voltage start setting value lower than decompression, when reach decompression start adjust time delay time, start decompression start switching mode;

System sends tripping 1QF instruction;

Start series connection handoff delay device, after the time delay through series connection handoff delay device, adopt series connection to switch tripping 1QF;

After tripping 1QF, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 3QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 3QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 3QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 3QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops decompression starting switching mode;

After the setting time delay of 3QF delayer, closed 3QF, judges whether 1QF is tripping state simultaneously;

If 1QF is tripping state, then decompression startup switching completes.

Preferably, method comprises: recover manual switching mode in parallel; The manual switching mode in parallel of described recovery comprises:

After protection starts or decompression starts, normal power supply inlet wire one is by tripping, and inlet wire two for subsequent use is powered, if inlet wire one power up is normal, System recover runs to initial condition, starts and recovers manual switching mode in parallel;

After the time delay of the manual delayer setting of over recovery, judge whether satisfied switching condition in parallel;

If do not meet switching condition in parallel, handoff failure, system stops recovering manual switching mode in parallel;

If meet switching condition in parallel, send and close 1QF instruction, after combined floodgate time delay, judge whether 1QF closes;

If after combined floodgate time delay, 1QF is not closed, handoff failure, system stops recovering manual switching mode in parallel;

If after combined floodgate time delay, 1QF closes, and selects manual tripping 3QF or automatic tripping 3QF;

If select manual tripping 3QF, operating personnel in tripping operation time delay, tripping 3QF, system completes to be recovered manually in parallel and switches;

If select automatic tripping 3QF, after tripping operation time delay, send tripping 3QF instruction, tripping 3QF, system completes recovers manually switching in parallel.

Preferably, method comprises: recover manually switching mode simultaneously; The manual switching mode simultaneously of described recovery comprises:

After protection starts or decompression starts, normal power supply inlet wire one is by tripping, and inlet wire two for subsequent use is powered, if inlet wire one power up is normal, System recover runs to initial condition, starts and recovers manually switching mode simultaneously;

System sends tripping 3QF instruction;

Through while handoff delay device setting time delay after, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 1QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 1QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 1QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 1QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops recovering manually switching mode simultaneously;

After setting time delay, close 1QF;

After time delay, judge 3QF whether tripping, if 3QF tripping, then recover manually switching mode simultaneously and complete.

Preferably, method comprises: switch mis-jumping starts switching mode; Described switch mis-jumping starts switching mode and comprises:

When system normal condition, inlet wire one, inlet wire two are respectively two sections of bussed supplies, and during systems axiol-ogy tripping unexpected to the 1QF of normal co-bit, starting switch false tripping starts switching mode;

Judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 3QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 3QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 3QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 3QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After setting time delay, close 3QF, switch mis-jumping starts switching mode to be completed.

As can be seen from the above technical solutions, the present invention has the following advantages:

Switching undisturbed control strategy is according to waveform relevance theory and instantaneous reactive power theory, adopt check power valve and combine with mechanical chopper and control, with the dual waveform of voltage and instantaneous active power of monitoring mains side and load-side, merge automatic paralleling technology, fast handoff technique, surge suppression technology and load monitoring technology on-line and the automatics researched and developed, realize the quick of double-fed line stand-by power supply, reliable switching, thus realize the continuity of electrical source exchange, ensure powered user can keep dead electricity after regaining power supply before the technological process of production be not damaged, normal production can be proceeded to greatest extent.

Accompanying drawing explanation

In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in description below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of wire leading method electrical schematic diagram;

Fig. 2 is another kind of wire leading method electrical schematic diagram;

Fig. 3 is the equivalent circuit diagram of Fig. 1;

Fig. 4 is phasor diagram;

Fig. 5 is the residual voltage performance diagram of motor;

Fig. 6 is that manually parallel connection starts switching mode logic diagram;

Fig. 7 is manual switching mode logic diagram simultaneously;

Fig. 8 is that non-operating mode decompression starts switching mode logic diagram;

Fig. 9 is non-power condition switch false tripping switching mode logic diagram;

Figure 10 is that decompression starts switching mode logic diagram;

Figure 11 is for recovering manual switching mode logic diagram in parallel;

Figure 12 is for recovering manually switching mode logic diagram simultaneously;

Figure 13 is that switch mis-jumping starts switching mode logic diagram.

Embodiment

For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; specific embodiment and accompanying drawing will be used below; the technical scheme of the present invention's protection is clearly and completely described; obviously; the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in this patent, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of this patent protection.

The invention provides a kind of transformer station low-voltage system power source switching undisturbed control method, in Enterprise Power System, in order to the situation preventing power failure from causing system dead electricity, usually when system, multiple feed can be considered.When power supply breaks down or overhaul, can power supply be excised, close stand-by power supply, anti-locking system dead electricity, thus the production economy caused loss.In general system, the combined floodgate of stand-by power supply, uses automatic throw-in equipment of emergency power supply just can complete this function.But for when having more high-voltage motor in system, backup auto-activating device can not complete the switching of power supply preferably, because when power supply dead electricity, high-voltage motor, due to inertia, is in " coasting " state, bus now has higher residual voltage, and it is very slow to decline.If to close a floodgate stand-by power supply by backup auto-activating device or time-delay closing mode, probably cause the reverse combined floodgate of stand-by power supply and bus, very large impact is caused to system and electric equipment.Moreover backup auto-activating device or time-delay closing, have certain time delay, can not ensure bus continue have electricity, like this, make some need the production of continued power to cause power failure.based on produced problem during above electrical source exchange, undisturbed electrical source exchange scheme is proposed.

The electrical schematic diagram that the present invention uses refers to shown in Fig. 1 and Fig. 2, the equivalent circuit diagram of Fig. 1 is for shown in Fig. 3, and Fig. 4 is vectogram, and Fig. 5 is the tolerance limit that the residual voltage characteristic curve of motor and the impulse current of motor tolerance are determined, here for motor, Us-supply voltage; The residual voltage of Ud-bus upper motor; Xs-power supply equivalent reactance; The equivalent reactance of Xm-bus upper motor group; Beat voltage between Δ U-supply voltage and residual voltage.

As shown in Figure 1, be the wire inlet system of a band high-voltage motor.During normal operation, bus power supply is provided by inlet wire one, and inlet wire two is in stand-by state.When inlet wire one protection act or inlet wire one dead electricity; active finger switch 1QF will by tripping; the rotary load part motor be now connected on bus will run as generator mode; part motor is by coasting; now on bus, the frequency of voltage (residual voltage) and amplitude will decay gradually; if stand-by power supply 2QF closes, inevitably impact to the motor on bus, the self-starting of serious threat station-service rotary load and safe operation.Figure 3 shows that equivalent circuit diagram when motor recloses power supply and phase angle figure, as can be seen from the figure, different θ angles (supply voltage and motor residual voltage angle therebetween), corresponding different Δ Uvalue, during as θ=180 °, Δ Ube worth maximum, if now power turn-on again, to the most severe impact of motor.According to the residual voltage characteristic of motor and the ability of motor withstand current in groups on bus, polar coordinates can be drawn its residual voltage curve,

Motor again power turn-on time, the voltage on motor umfor:

In formula

The equivalent reactance of Xm-motor unit load conversion bus bar side;

The equivalent reactance of Xs-power supply;

The beat voltage of U-between supply voltage and residual voltage.

Permission voltage when making Um equal motor starting, is the rated voltage UDe of 1.1 times of motor:

Then:

Order:

Then:

Suppose K=0.67, calculate △ U(%)=1.64.In Fig. 2-3, with A point for the center of circle, with 1.64 for radius draws A '-A ' ' circular arc, be the safety zone of stand-by power supply combined floodgate on the right side of it.In the characteristic AB section of residual voltage, the switching that the electrical source exchange of realization is called " switching fast " namely carries out before B point (0.3 second) is in the drawings safe to motor.Carry out after time delay to C point (0.47 second) differentiating the same period that the switching realized is called that " same period differentiate switch " is also now safe to motor.The switching realized when decaying to 20% ~ 40% etc. residual voltage, is " remnant voltage switch ".For guaranteeing handover success, when judging accident starts, device starts automatically, and " delayed transfer " is standby as the General Logistics Department of judging accident.

In the present invention, the quick same period switches to:

When the firm tripping of active side switch, bus residual voltage declines comparatively slow, as A-B section in Fig. 5, in this section, measured value and setting value is compared instantaneously, judge whether satisfied combined floodgate condition before device sends order of closing a floodgate.

When possessing one of following situation, all meet the condition switched fast:

1, difference on the frequency, phase angle difference are simultaneously satisfied imposes a condition;

2, voltage vector difference is satisfied imposes a condition;

3, poor, the difference on the frequency of voltage vector long-pending meets and imposes a condition.

Always carry out instantaneously after activation owing to switching fast, therefore pressure reduction, frequency difference and difference are adjusted desirable smaller value.If switch closing time is at about 100ms, undisturbed device can close a floodgate rapidly, realizes the rapid closing in 200ms.

same-slope curve is:

In Fig. 5, crossing the rear BC section of B point is dangerous region, does not allow to switch.Be commonly referred to " time delay switching " or " short time delay switching " to the switching of CD section realization after C point.Analyzed above, unreliable by the method for constant time lag.Best bet is frequency difference and the angular difference change of real-time tracking residual voltage, accomplishes to close a floodgate when feedback voltage and backup power source voltage vector first time phase coincidence as far as possible, and Here it is so-called " same-slope curve ".To scheme, the same-slope curve time is about 0.6S, and to decay situation faster for residual voltage, this time wants much shorter.If can realize same-slope curve, particularly close a floodgate with phase point, also very favourable to the self-starting of motor, because now busbar voltage decays to about 65%-70%, motor speed is unlikely to decline very large, and impacts minimum when stand-by power supply closes.

The change of the frequency of each supply voltage of undisturbed power transfer device energy real-time tracking, phase place and phase difference.In differentiation same period process, device calculates phase angle difference speed and acceleration between target power and residual voltage, carry out calculating combined floodgate lead according to the closing time of target power switch of setting, thus ensured residual voltage and target voltage vectorial at first time phase coincidence time close a floodgate.Reduce the impact to station-service rotary load.

Same-slope curve setting value has four: pressure reduction, difference on the frequency, more front closing time, frequency difference acceleration locking value.Difference on the frequency is adjusted desirable higher value, and more front closing time is the breaker closing time, in order to prevent frequency decay too fast, causing and being greater than complete cycle angle closing a floodgate with catching function, when system frequency decay is very fast, when being greater than frequency difference acceleration locking value, and locking synchronization cap-ture function.

remnant voltage switch is:

The switching realized when busbar voltage (residual voltage) drops to 20% ~ 40% rated voltage is called " remnant voltage switch ", and this switching can be used as the standby of the switching quick same period and same-slope curve function, to improve the success rate of electrical source exchange.Though remnant voltage switch can ensure motor safety, because interruption duration is long, motor self-staring success or not, self-starting time etc. all will be subject to larger restriction.

delayed transfer is:

When in some cases, the residual voltage on bus likely not easily decays, and now as residual voltage definite value arranges improper, may postpone or no longer carry out closing operation.Therefore separately established delayed transfer function in the apparatus, standby as above three kinds of General Logistics Departments switched, delayed transfer must drop into.

in the present invention, be divided into by action sequence:

Switching in parallel: first close stand-by power supply, and two power supplys are in parallel in short-term, then tripping working power.Can select automated manner or semiautomatic fashion, semiautomatic fashion is for manually to jump working power.This kind of mode can be used for normal manual and switches.

Series connection switches: first tripping working power, after the tripping of confirmation operating switch, then the stand-by power supply that closes.Bus power-off time is at least backup circuit breaker closing time.This kind of mode is used for judging accident.

Switch: this mode is between parallel connection switches and series connection switches simultaneously.Close standby command jumping work order send after, send before operating switch tripping.Bus power-off time is greater than 0ms and is less than backup circuit breaker closing time, can arrange time delay to adjust.This mode both can be used for normal switching, also can be used for judging accident.

by starting causality classification be:

Normal manual switches: started by operations staff's manual operation, and fast switching device carries out breaking-closing operating by the manual switchover mode (in parallel, simultaneously) of in advance setting.

Accident automatically switches: started by protection contact.While upper level protection exit jumps working power switch, start fast switching device and switch, fast switching device carries out breaking-closing operating by prior automatic switching mode (connect, simultaneously).

Damage automatically switches: have two kinds of abnormal conditions: one is bus loss of pressure.After busbar voltage reaches lower than voltage of adjusting time delay of adjusting, device self start, and switch by automated manner.Two is working power switch mis-jumpings, and by operating switch auxiliary contact starting device, close when switching condition meets stand-by power supply.

be categorized as by switch speed:the quick switching same period, same-slope curve, remnant voltage switch, delayed transfer.

If system is cold standby, undisturbed device, when sending out combined floodgate order, can be sent out and close the order of stand-by power supply high-pressure side.If system adopts stand-by heat, or during without high side switch, ask unsettled high side switch, then high side switch acquiescence is in co-bit all the time.

wire leading method

When system is wire leading method, its terminal figure is shown in accompanying drawing 1, and this system is made up of two inlet wires and a bus, and normal is bussed supply by inlet wire one when running, and inlet wire two is stand-by power supply.If during without high side switch 4QF, 5QF, corresponding switching value should be unsettled, makes it show co-bit.

L manually boots switching

Jump 1QF, close 2QF

Jump 2QF, close 1QF

L protection, decompression, false tripping start and switch

Jump 1QF, close 2QF

Jump 2QF, close 1QF

When system is mother mode, its terminal figure is shown in accompanying drawing 2, and this system is made up of two sections of inlet wires and two sections of buses, and during normal operation, two inlet wires are with two sections of bus independent operatings respectively, and two buses are for subsequent use each other.If during without high side switch 4QF, 5QF, corresponding switching value should be unsettled, makes it show co-bit.

L manually boot switching (for the protection of, after decompression, false tripping, the manual recovery of system)

Jump 3QF, close 1QF

Jump 3QF, close 2QF

L protection, decompression, false tripping start and switch

Jump 1QF, close 3QF

Jump 2QF, close 3QF

adaptive mode

Under adaptive mode, device can be in mother mode or wire leading method according to position of the switch state automatic decision system, and can switch by manual mode in two kinds of modes according to intake " hand cuts way selection ".System is mother mode, and two sections of inlet wires are with two sections of bus independent operatings respectively, and for subsequent use each other.When wherein one section of bus dead electricity, tripping trouble power, closed section breaker, is run by one section of inlet wire band, two sections of buses, forms inlet wire pattern, continues to form bright for subsequent use with another inlet wire, also can continue to return to mother mode operation.

When 1QF, 2QF, 4QF, 5QF are in co-bit, 3QF is when dividing position

L protection, decompression, false tripping start and switch

Jump 1QF, close 3QF

Jump 2QF, close 3QF

As 3QF, 1QF(2QF) in co-bit, 2QF(1QF) when dividing position

L protection, decompression, false tripping start and switch

Jump 1QF, close 2QF

Jump 2QF, close 1QF

L manually boots switching

Jump 3QF, conjunction 1QF(" manual mode selection " intake divides position)

Jump 3QF, conjunction 2QF(" manual mode selection " intake divides position)

Jump 1QF, close 2QF(" manual mode selection " intake co-bit)

Jump 2QF, close 1QF(" manual mode selection " intake co-bit)

In transformer station of the present invention, low-voltage system power source switching undisturbed control method is not limited to above-mentioned two kinds of circuit theory diagrams, and the scheme of control method controls to implement to being suitable for the corresponding circuit diagram inlet wire of this control method.

Refer to shown in Fig. 6, method comprises: manually startup switching mode in parallel; Described manual parallel connection starts switching mode and comprises:

Inlet wire one gives bussed supply, starts manually startup switching mode in parallel;

After the time delay through setting, judge whether satisfied switching condition in parallel;

If do not meet switching condition in parallel, handoff failure, system stops manually startup switching mode in parallel;

If meet switching condition in parallel, send and close 2QF instruction, after combined floodgate time delay, judge whether 2QF closes;

If after combined floodgate time delay, 2QF is not closed, handoff failure, system stops manually startup switching mode in parallel;

If after combined floodgate time delay, 2QF closes, and selects manual tripping 1QF or automatic tripping 1QF;

Select manual tripping 1QF, in tripping operation time delay, tripping 1QF, system completes switching;

Select automatic tripping 1QF, after tripping operation time delay, send tripping 1QF instruction, tripping 1QF, systematic evaluation completes;

If after tripping operation time delay, send tripping 1QF instruction, the non-tripping of 1QF, handoff failure, system tripping 2QF, system locking.

Method of the present invention also comprises: the switching mode while of manually, refers to shown in Fig. 7; Described manual while switching mode comprise:

Inlet wire one gives bussed supply, manually switches startup simultaneously;

Send and jump 1QF instruction;

After switching combined floodgate time delay, judge whether quick switching drops into simultaneously, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 2QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 2QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 2QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 2QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops manually switching simultaneously;

Send after closing 2QF instruction, start and manually close delayer simultaneously, close 2QF after the time delay through setting;

If in the time delay of setting, 2QF is not closed, handoff failure, stop manually switching simultaneously;

Close in the time delay of setting after 2QF, start and manually drive delayer simultaneously, tripping 1QF after the time delay through setting, switching completes.

Method of the present invention also comprises: non-operating mode decompression starts switching mode, refers to shown in Fig. 8; Described non-operating mode decompression starts switching mode and comprises:

Inlet wire one gives bussed supply, starts non-operating mode decompression and starts switching;

System sends tripping 1QF instruction;

Start series connection handoff delay device, after the time delay through series connection handoff delay device, adopt series connection to switch tripping 1QF;

After tripping 1QF, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 2QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 2QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 2QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 2QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After the setting time delay of 2QF delayer, closed 2QF, judges whether 1QF is tripping state simultaneously;

If 1QF is tripping state, then non-operating mode decompression startup switching completes.

Method of the present invention also comprises: non-power condition switch false tripping switching mode, refers to shown in Fig. 9; Described non-power condition switch false tripping switching mode comprises:

When system no alarm, without locking, when being in normal operating condition, when the unexpected tripping of the 2QF being in normal co-bit being detected, system starts non-power condition switch false tripping switching mode;

Judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 1QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 1QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 1QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 1QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After the setting time delay through false tripping handoff delay device, close 1QF, non-power condition switch false tripping has switched.

Method of the present invention also comprises: decompression starts switching mode, refers to shown in Figure 10; Described decompression starts switching mode and comprises:

Inlet wire one voltage reduce, make inlet wire one maximum line voltage start setting value lower than decompression, when reach decompression start adjust time delay time, start decompression start switching mode;

System sends tripping 1QF instruction;

Start series connection handoff delay device, after the time delay through series connection handoff delay device, adopt series connection to switch tripping 1QF;

After tripping 1QF, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 3QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 3QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 3QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 3QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops decompression starting switching mode;

After the setting time delay of 3QF delayer, closed 3QF, judges whether 1QF is tripping state simultaneously;

If 1QF is tripping state, then decompression startup switching completes.

Method of the present invention also comprises: recover manual switching mode in parallel, refer to shown in Figure 11; The manual switching mode in parallel of described recovery comprises:

After protection starts or decompression starts, normal power supply inlet wire one is by tripping, and inlet wire two for subsequent use is powered, if inlet wire one power up is normal, System recover runs to initial condition, starts and recovers manual switching mode in parallel;

After the time delay of the manual delayer setting of over recovery, judge whether satisfied switching condition in parallel;

If do not meet switching condition in parallel, handoff failure, system stops recovering manual switching mode in parallel;

If meet switching condition in parallel, send and close 1QF instruction, after combined floodgate time delay, judge whether 1QF closes;

If after combined floodgate time delay, 1QF is not closed, handoff failure, system stops recovering manual switching mode in parallel;

If after combined floodgate time delay, 1QF closes, and selects manual tripping 3QF or automatic tripping 3QF;

If select manual tripping 3QF, operating personnel in tripping operation time delay, tripping 3QF, system completes to be recovered manually in parallel and switches;

If select automatic tripping 3QF, after tripping operation time delay, send tripping 3QF instruction, tripping 3QF, system completes recovers manually switching in parallel.

Method of the present invention also comprises: recover manually switching mode simultaneously, refer to shown in Figure 12; The manual switching mode simultaneously of described recovery comprises:

After protection starts or decompression starts, normal power supply inlet wire one is by tripping, and inlet wire two for subsequent use is powered, if inlet wire one power up is normal, System recover runs to initial condition, starts and recovers manually switching mode simultaneously;

System sends tripping 3QF instruction;

Through while handoff delay device setting time delay after, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 1QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 1QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 1QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 1QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops recovering manually switching mode simultaneously;

After setting time delay, close 1QF;

After time delay, judge 3QF whether tripping, if 3QF tripping, then recover manually switching mode simultaneously and complete.

Method of the present invention also comprises: switch mis-jumping starts switching mode, refers to shown in Figure 13; Described switch mis-jumping starts switching mode and comprises:

When system normal condition, inlet wire one, inlet wire two are respectively two sections of bussed supplies, and during systems axiol-ogy tripping unexpected to the 1QF of normal co-bit, starting switch false tripping starts switching mode;

Judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 3QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 3QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 3QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 3QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After setting time delay, close 3QF, switch mis-jumping starts switching mode to be completed.

Switching undisturbed control strategy is according to waveform relevance theory and instantaneous reactive power theory, adopt check power valve and combine with mechanical chopper and control, with the dual waveform of voltage and instantaneous active power of monitoring mains side and load-side, merge automatic paralleling technology, fast handoff technique, surge suppression technology and load monitoring technology on-line and the automatics researched and developed, realize the quick of double-fed line stand-by power supply, reliable switching, thus realize the continuity of electrical source exchange, ensure powered user can keep dead electricity after regaining power supply before the technological process of production be not damaged, normal production can be proceeded to greatest extent.

The bus residual voltage (when higher) of switching undisturbed control strategy energy real-time tracking, judgement, seizure load and the best switch on opportunity point of backup power source voltage, realize the quick undisturbed of stand-by power supply to drop into, avoid " prepared auto restart " Problems existing, improve power quality.

In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, identical similar portion reference mutually between each embodiment.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (8)

1. transformer station's low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: manually startup switching mode in parallel; Described manual parallel connection starts switching mode and comprises:

Inlet wire one gives bussed supply, starts manually startup switching mode in parallel;

After the time delay through setting, judge whether satisfied switching condition in parallel;

If do not meet switching condition in parallel, handoff failure, system stops manually startup switching mode in parallel;

If meet switching condition in parallel, send and close 2QF instruction, after combined floodgate time delay, judge whether 2QF closes;

If after combined floodgate time delay, 2QF is not closed, handoff failure, system stops manually startup switching mode in parallel;

If after combined floodgate time delay, 2QF closes, and selects manual tripping 1QF or automatic tripping 1QF;

Select manual tripping 1QF, in tripping operation time delay, tripping 1QF, system completes switching;

Select automatic tripping 1QF, after tripping operation time delay, send tripping 1QF instruction, tripping 1QF, systematic evaluation completes;

If after tripping operation time delay, send tripping 1QF instruction, the non-tripping of 1QF, handoff failure, system tripping 2QF, system locking.

2. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: the switching mode while of manually; Described manual while switching mode comprise:

Inlet wire one gives bussed supply, manually switches startup simultaneously;

Send and jump 1QF instruction;

After switching combined floodgate time delay, judge whether quick switching drops into simultaneously, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 2QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 2QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 2QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 2QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops manually switching simultaneously;

Send after closing 2QF instruction, start and manually close delayer simultaneously, close 2QF after the time delay through setting;

If in the time delay of setting, 2QF is not closed, handoff failure, stop manually switching simultaneously;

Close in the time delay of setting after 2QF, start and manually drive delayer simultaneously, tripping 1QF after the time delay through setting, switching completes.

3. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: non-operating mode decompression starts switching mode; Described non-operating mode decompression starts switching mode and comprises:

Inlet wire one gives bussed supply, starts non-operating mode decompression and starts switching;

System sends tripping 1QF instruction;

Start series connection handoff delay device, after the time delay through series connection handoff delay device, adopt series connection to switch tripping 1QF;

After tripping 1QF, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 2QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 2QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 2QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 2QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After the setting time delay of 2QF delayer, closed 2QF, judges whether 1QF is tripping state simultaneously;

If 1QF is tripping state, then non-operating mode decompression startup switching completes.

4. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: non-power condition switch false tripping switching mode; Described non-power condition switch false tripping switching mode comprises:

When system no alarm, without locking, when being in normal operating condition, when the unexpected tripping of the 2QF being in normal co-bit being detected, system starts non-power condition switch false tripping switching mode;

Judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 1QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 1QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 1QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 1QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After the setting time delay through false tripping handoff delay device, close 1QF, non-power condition switch false tripping has switched.

5. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: decompression starts switching mode; Described decompression starts switching mode and comprises:

Inlet wire one voltage reduce, make inlet wire one maximum line voltage start setting value lower than decompression, when reach decompression start adjust time delay time, start decompression start switching mode;

System sends tripping 1QF instruction;

Start series connection handoff delay device, after the time delay through series connection handoff delay device, adopt series connection to switch tripping 1QF;

After tripping 1QF, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 3QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 3QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 3QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 3QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops decompression starting switching mode;

After the setting time delay of 3QF delayer, closed 3QF, judges whether 1QF is tripping state simultaneously;

If 1QF is tripping state, then decompression startup switching completes.

6. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: recover manual switching mode in parallel; The manual switching mode in parallel of described recovery comprises:

After protection starts or decompression starts, normal power supply inlet wire one is by tripping, and inlet wire two for subsequent use is powered, if inlet wire one power up is normal, System recover runs to initial condition, starts and recovers manual switching mode in parallel;

After the time delay of the manual delayer setting of over recovery, judge whether satisfied switching condition in parallel;

If do not meet switching condition in parallel, handoff failure, system stops recovering manual switching mode in parallel;

If meet switching condition in parallel, send and close 1QF instruction, after combined floodgate time delay, judge whether 1QF closes;

If after combined floodgate time delay, 1QF is not closed, handoff failure, system stops recovering manual switching mode in parallel;

If after combined floodgate time delay, 1QF closes, and selects manual tripping 3QF or automatic tripping 3QF;

If select manual tripping 3QF, operating personnel in tripping operation time delay, tripping 3QF, system completes to be recovered manually in parallel and switches;

If select automatic tripping 3QF, after tripping operation time delay, send tripping 3QF instruction, tripping 3QF, system completes recovers manually switching in parallel.

7. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: recover manually switching mode simultaneously; The manual switching mode simultaneously of described recovery comprises:

After protection starts or decompression starts, normal power supply inlet wire one is by tripping, and inlet wire two for subsequent use is powered, if inlet wire one power up is normal, System recover runs to initial condition, starts and recovers manually switching mode simultaneously;

System sends tripping 3QF instruction;

Through while handoff delay device setting time delay after, judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 1QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 1QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 1QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 1QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops recovering manually switching mode simultaneously;

After setting time delay, close 1QF;

After time delay, judge 3QF whether tripping, if 3QF tripping, then recover manually switching mode simultaneously and complete.

8. transformer station according to claim 1 low-voltage system power source switching undisturbed control method, it is characterized in that, method comprises: switch mis-jumping starts switching mode; Described switch mis-jumping starts switching mode and comprises:

When system normal condition, inlet wire one, inlet wire two are respectively two sections of bussed supplies, and during systems axiol-ogy tripping unexpected to the 1QF of normal co-bit, starting switch false tripping starts switching mode;

Judge whether quick switching drops into, and judge whether satisfied quick switching condition;

If switch input fast, and meet quick switching condition, then send and close 3QF instruction;

If switching does not drop into fast, or switches input fast, and does not meet quick switching condition, then go to and switch the same period;

Go to after switching the same period, judge that the same period switches and whether drop into, and judge whether to meet the switching condition same period;

Drop into if the same period switches, and meet the switching condition same period, then send and close 3QF instruction;

If the same period, switching did not drop into, or switch input the same period, and do not meet the switching condition same period, then go to remnant voltage switch;

After going to remnant voltage switch, judge whether remnant voltage switch drops into, and judge whether to meet remnant voltage switch condition;

If remnant voltage switch drops into, and meets remnant voltage switch condition, then send and close 3QF instruction;

If remnant voltage switch does not drop into, or remnant voltage switch drops into, and does not meet remnant voltage switch condition, then go to delayed transfer;

After going to remnant voltage switch, judge whether delayed transfer drops into, and judge whether to meet delayed transfer condition;

If delayed transfer drops into, and meets delayed transfer condition, then send and close 3QF instruction;

If delayed transfer does not drop into, or delayed transfer drops into, and less than foot length time delay switching condition, then stops non-operating mode decompression to start switching mode;

After setting time delay, close 3QF, switch mis-jumping starts switching mode to be completed.