CN201789334U - Standby power switching device - Google Patents
Standby power switching device Download PDFInfo
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- CN201789334U CN201789334U CN2010205081816U CN201020508181U CN201789334U CN 201789334 U CN201789334 U CN 201789334U CN 2010205081816 U CN2010205081816 U CN 2010205081816U CN 201020508181 U CN201020508181 U CN 201020508181U CN 201789334 U CN201789334 U CN 201789334U
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Abstract
A standby power switching device comprises an acquisition power supply circuit, a standby power circuit, a bus, a load circuit, a current, voltage and frequency value sampling module, an input acquisition module, a processing module and an output control module, wherein the current, voltage and frequency value sampling module is arranged in at least one of branch circuits of the load circuit, the input acquisition module acquires input signals, the processing module transmits control signals after processing current value, voltage value, frequency value and the input signals, the output control module executes control according to the control signals, and the processing module is respectively connected with the sampling module, the input acquisition module and the output control module. By the aid of the processing module for respectively acquiring the current value, the voltage value and the frequency value of the sampling module and the input signals of the input acquisition module and by the aid of the output control module for executing control according to the control signals transmitted by the processing module, the standby power switching device is capable of accurately and rapidly switching standby power supplies.
Description
[technical field]
The utility model relates to power domain, particularly relates to a kind of stand-by power supply switching device shifter.
[background technology]
In factories and miness continuity manufacturing enterprises such as petrochemical industry, metallurgy, its production technology and flow process have proposed very high requirement to power supply reliability and continuity, and the interruption of power supply and voltage fluctuation can be brought tremendous loss to enterprise.
As Fig. 1, according to the n-1 criterion of conventional electric power system, in order to improve power supply reliability, the electric power system of above-mentioned industrial enterprise all adopts and is no less than two power supply designs.Two inlet wires are powered to bus simultaneously, and bus connection switch ML disconnects, and I bus and II bus be stand-by power supply each other.Article two, inlet wire derives from the different substation of same electrical network, when electrical network breaks down when causing wherein one section bus (I bus or II bus) dead electricity, the service entrance switch of tripping dead electricity bus (1DL or 2DL), mother is joined ML then closes at once, make the dead electricity bus be subjected to electricity again, improve the reliability of power supply with this.The device that electric power system will be used for finishing these a series of power supply switching controls is referred to as automatic throw-in equipment of emergency power supply, is called for short prepared auto restart.
Because the difference of part throttle characteristics and operating condition, the input condition of traditional prepared auto restart has three kinds usually, and promptly 1. working power disconnects (using " not having stream " to make criterion); 2. backup power source voltage normally (is used " pressure is arranged " criterion); 3. the busbar voltage of loading is zero (using " do not have and press " criterion).But 3. condition has significant limitation, because the main load of industrial enterprise is various motor, motor cluster will enter the generator state after the bus dead electricity, and its feedback voltage has constituted the residual voltage (as Fig. 2) of dead electricity bus; After bus with a large amount of induction-motor loads loses power supply, particularly has the synchronous motor in independent excitation loop, its voltage V
MFrequency and amplitude in fact reflected remaining meritorious (machinery inertial) and idle (magnetization energy) component of motor cluster, it is zero often to need the several seconds just can decay to.According to condition 3. drop into stand-by power supply, to cause long interruption duration, again being subjected to needs the long dynamo-electric transient process (several seconds) of elapsed-time standards behind the electricity, moreover this moment for fear of a large amount of self starting motors in groups to the impact of stand-by power supply, generally need the cut-out load branch circuit, this has brought enormous economic loss for equicontinuity manufacturing enterprise.
In addition, the load condition complexity of industrial enterprise, a lot of large-scale factories and miness have disposed house generator.When the bus dead electricity, house generator is owing to have independently energized circuit and dynamical system, and they all have stronger supporting role to power in the loading zone and voltage consumption, make existing stand-by power supply in time to switch, and put into production use timely.
[utility model content]
Based on this, be necessary to provide a kind of stand-by power supply switching device shifter fast.
A kind of stand-by power supply switching device shifter comprises: the sampling module of gathering electric current, voltage and the frequency values at least one road in supply line, stand-by power supply circuit, bus, load circuit and the branch road thereof; Opening into acquisition module into signal opened in collection; To described electric current, voltage and frequency values and the processing module of sending control signal after opening signal processing; Carry out the control module of leaving of control action according to described control signal; Described processing module respectively with sampling module, open into acquisition module and leave control module and be connected.
Preferably, described processing module also comprises and is used for the described main processing block of opening into the instruction set of signal and control signal of computing, and be used to handle described open into signal and control signal from processing module.
Preferably, described main processing block is RISC MPU.
Preferably, described is asic chip from processing module.
Preferably, also comprise with processing module being connected, and be used to show the signaling module of leaving of control signal that processing module produces.
Preferably, also comprise with processing module being connected, and be used to correct the clock module of the clock information of stand-by power supply switching device shifter.
Preferably, also comprise with processing module being connected, and the human-computer interaction module that is used to set the numerical value of relevant criterion and/or feeds back the operating state of stand-by power supply switching device shifter.
Preferably, also comprise with processing module being connected, and be used for transmission signals, far distance controlled and obtain the communication module of described stand-by power supply switching device shifter state.
Preferably, also comprise with processing module being connected, and be used to print the print module of the parameter of stand-by power supply switching device shifter.
Preferably, also comprise with processing module being connected, and be used to the stand-by power supply switching device shifter that the power module of DC power supply is provided.
By processing module obtain respectively sampling module electric current, voltage and frequency values, open into acquisition module open into signal and carry out control signal that processing module sends leave control module, cut-in stand-by power supply accurately and rapidly.
[description of drawings]
Fig. 1 is a conventional electric power system power supply mode schematic diagram;
Fig. 2 is the polar diagram of the relative stand-by power supply of dead electricity bus residual voltage;
Fig. 3 is the theory diagram of stand-by power supply switching device shifter;
Fig. 4 is for starting the logic diagram of tripping working power switch;
Fig. 5 is for frequently pressing quality enable logic figure;
Fig. 6 is frequency difference enable logic figure;
Fig. 7 does not have stream enable logic figure for frequency difference;
Fig. 8 is inverse probability enable logic figure;
Fig. 9 is frequency difference inverse probability enable logic figure;
Figure 10 is power direction latching logic figure;
Figure 11 is for dropping into the logic diagram of stand-by power supply.
[embodiment]
In order to solve the problem that stand-by power supply can't in time switch, a kind of stand-by power supply switching device shifter is provided, 3 set forth in conjunction with the accompanying drawings.
This stand-by power supply switching device shifter comprises: the sampling module 20 of gathering electric current, voltage and frequency values; Opening into acquisition module 30 into signal opened in collection; The processing module 10 of sending control signal after the signal processing of opening to electric current, voltage and the frequency values of this collection and collection; Leave control module 40 according to what the control signal sent was carried out control action; Processing module 10 with sampling module 20, open into acquisition module 30 and leave control module 40 and be connected.
Open into acquisition module 30; be used for gathering and open into signal, this open into signal comprise this supply line, stand-by power supply circuit, bus or circuits such as load circuit and branch road thereof circuit breaker auxiliary contact position signalling, relay protection signal and control switch signal etc. some open into control signal.Particularly, this is opened and gathers the digitized of 220V/110V into acquisition module 30 and open into signal, and adopt photoelectric isolation technology, have good anti-interference.
In conjunction with the accompanying drawings 4 to 10, press quality to start frequently, press criterion that quality starts to determine whether dead electricity of bus frequently by the electric power thus supplied that detects bus.This presses the condition of quality start-up criterion to be frequently: (U
n-U
Ab)＞Δ U
p, (U
n-U
Bc)＞Δ U
p, (U
n-U
Ca)＞Δ U
p, (F
n-F
Bus)＞Δ F
p, dF/dt＞50Hz/s (this condition is " non-" in logic diagram, negate), above-mentioned condition must satisfy simultaneously, by the action delay t that sets
Dz1, this is pressed quality to start frequently and then carries out and starts action.U wherein
nAnd F
nThe rated voltage and the rated frequency that refer to load system respectively; U
Ab, U
Bc, U
CaBe meant the three-route voltage of dead electricity bus; F
BusBe meant the frequency of bus; Δ U
pWith Δ F
pRefer to respectively the voltage deviation and the frequency departure that allow come value according to the situation of grid supply quality, preferably voltage deviation is 10～15%U
nWith frequency departure be 0.2～0.5Hz; DF/dt is meant frequency slip frequency, i.e. rate of change is preferably and is less than or equal to 50Hz/S, because frequency reflection machinery inertial, mistake is measured in the too fast representative that descends or load system collapses; t
Dz1Represent action delay, preferably get 50～100ms.
Frequency difference starts, and the criterion that frequency difference starts is determined whether dead electricity of bus by relatively bus frequency and stand-by power supply frequency.The condition of this frequency difference start-up criterion is: F
Bus＜F
n, (F
b-F
Bus)＞Δ F
Dz, U
Bus＞U
Dy, above-mentioned condition must satisfy simultaneously, by the action delay t that sets
Dz2, this frequency difference starts then to carry out to start moves.U wherein
BusBe the busbar voltage (U of frequency measurement
BusBe meant the current voltage that is judged to the dead electricity bus); F
BusBe meant the frequency of bus; F
bBe meant the frequency of stand-by power supply; Δ F
DzBe meant the operating value that frequency difference is out-of-limit, be preferably 0.2～0.5Hz; U
DyBe the low-voltage dead lock value of this criterion, because criterion is mainly used in the bus residual voltage amplitude occasion slowly that descends, thus should locking when voltage is low, be preferably 60～80%U
nt
Dz2Represent action delay, generally get 50～100ms.
Frequency difference does not have stream and starts, and frequency difference does not have the criterion of stream startup by the working power inlet wire there not being the differentiation of stream, can increase detecting reliability and accelerate detection speed.F
bus＜F
n，(F
b-F
bus)＞ΔF
dz，U
bus＞U
dy，I
a＜I
wl，I
b＜I
wl，I
c＜I
wl。Above-mentioned condition must satisfy simultaneously, by the action delay t that sets
Dz3, this frequency difference does not have stream and starts then execution startup action.U wherein
BusIt is the busbar voltage of frequency measurement; F
BusBe meant the frequency of bus; F
bBe meant the frequency of stand-by power supply; Δ F
DzBe meant the operating value that frequency difference is out-of-limit, be preferably 0.2～0.5Hz; U
DyBe the low-voltage dead lock value of this criterion, because criterion is mainly used in the bus residual voltage amplitude occasion slowly that descends, thus should locking when voltage is low, be generally 60～80%U
nI
a, I
b, I
cBe meant the three-phase current of working power inlet wire; I
WlBe meant to be used to differentiate the definite value of not having stream, should set according to the certainty of measurement of on-the-spot current circuit, particularly, I
WlValue be the on-the-spot minimum current value that can accurately detect because there is drift in the measurement loop of measurement mechanism, on-the-spot current transformer has the measurement dead band, preferably gets 3～5% load current value; t
Dz3Represent action delay, generally get 20～50ms.
Inverse probability starts, and the criterion that inverse probability starts is by the flow direction of detection power.The condition of this inverse probability start-up criterion is: A phase power direction is for flowing out bus, and B phase power direction is for flowing out bus, and C phase power direction is for flowing out bus, I
a＞I
Set, I
b＞I
Set, I
c＞I
SetAbove-mentioned A phase power direction is that outflow bus, B phase power direction are at least one establishment among the outflow bus condition for outflow bus, C phase power direction, and I
a＞I
Set, I
b＞I
Set, I
c＞I
SetAmong at least one set up and action delay t by setting
Dz4, this inverse probability starts then to carry out to start moves.Wherein, I
a, I
b, I
cBe meant the three-phase current of working power inlet wire; I
SetBe meant the starting current value that inverse probability is differentiated, for the working condition that does not have house generator, preferably be set at the load current value about 10%, in other embodiments, by avoiding normal operation condition inverse probability current settings, be preferably 10～20% load current values; t
Dz4Representing action delay, is cable line as the bus near-end, preferably choose 20ms or more than, if overhead transmission line because the malfunction that the lightning arrester discharge causes will avoid being struck by lightning the time according to the relay protected operation rules, then is set at 80～100ms.
The frequency difference inverse probability starts, and the criterion that the frequency difference inverse probability starts is by the flow direction of detection power, and emphasis considers that objectively there is certain response time in the generator speed adjusting gear.The condition of this frequency difference inverse probability start-up criterion is: A phase power direction is for flowing out bus, and B phase power direction is for flowing out bus, and C phase power direction is for flowing out bus; I
a＞I
Set, I
b＞I
Set, I
c＞I
SetF
Bus＜F
n, (F
b-F
Bus)＞Δ F
Dz, U
Bus＞U
DyAbove-mentioned A phase power direction is that outflow bus, B phase power direction are at least one establishment among the outflow bus condition, I for outflow bus, C phase power direction
a＞I
Set, I
b＞I
Set, I
c＞I
SetAmong at least one set up and F
Bus＜F
n, (F
b-F
Bus)＞Δ F
Dz, U
Bus＞U
DyAll set up, and the action delay t by setting
Dz5, this frequency difference inverse probability starts then to carry out to start moves.I
a, I
b, I
cBe meant the three-phase current of working power inlet wire; I
SetBe meant the starting current value that inverse probability is differentiated, for the working condition that does not have house generator, preferably be set at the load current value about 10%, by avoiding normal operation condition inverse probability current settings, be preferably 10～20% load current values in other embodiments; t
Dz5Representing action delay, is cable line as the bus near-end, generally get more than the 20ms, if overhead transmission line, because the malfunction that the lightning arrester discharge causes will avoid being struck by lightning the time according to the relay protected operation rules, then is set at 80～100ms.
The criterion of power direction locking comes whether to have the fault point in the cog region by utilizing the sense of current and amplitude, is meant bus and each outlet branch in this district.A phase power direction is for flowing into bus, and B phase power direction is for flowing into bus, and C phase power direction is for flowing into bus, I
a＞I
Load, I
b＞I
Load, I
c＞I
Load, U
Ab＜U
Set, U
Bc＜U
Set, U
Ca＜U
SetAbove-mentioned A phase power direction must be simultaneously set up I for inflow bus, C phase power direction for flowing into the bus condition for inflow bus, B phase power direction
a＞I
Load, I
b＞I
Load, I
c＞I
LoadAmong the condition at least one set up, and U
Ab＜U
Set, U
Bc＜U
Set, U
Ca＜U
SetAmong the condition at least one set up, and the action delay t by setting
Dz6, block action is then carried out in this power direction locking.I
a, I
b, I
cBe meant the three-phase current of working power inlet wire; I
LoadBe meant the maximum load current under the nominal situation; U
Ab, U
Bc, U
CaBe meant the three-route voltage of dead electricity bus; U
SetBe meant the low-voltage dead lock definite value, be preferably 80% rated voltage; t
Dz6Be the locking time-delay.This locking is divided into two stages, at first be not have time-delay to enter temporary transient blocking, after the certain time, enter reliable blocking, need this moment busbar voltage, frequency and power direction to reach the condition of returning and just can reopen prepared auto restart (as above-mentioned frequency difference inverse probability start-up criterion etc.); As the t of blocking time less than preset value
Dz6The locking time-delay, then at once open prepared auto restart.This power direction locking criterion causes the operating mode of busbar voltage bust when preferably being applicable to some super-huge motor startings, can avoid the prepared auto restart malfunction.
Locking time-delay t
Dz6Adjust, be divided into two kinds of situations:
The one, bus protection is not installed at the scene, should be under the prerequisite of guaranteeing less than backup protection far away operate time of working power, and it is big that value is tried one's best.Particularly; this backup protection far away is meant operate time; when bus or load branch circuit are short-circuited fault,, be installed in the relaying protection operate time of work incoming power side (bus offside or upper level) if the protective relaying device of local installing does not have correct operation (tripping).Be traditionally arranged to be local protection operate time at backup protection far away and add that one differentially (is generally 300～1000ms), to reduce the zone that has a power failure operate time.This is because when busbar fault; if bus protection is not installed at the scene; just must rely on inlet wire backup protection far away to move and excise the fault point; and the busbar fault majority is a permanent fault; so device must withdraw from monitored state before backup protection action far away; to guarantee can not switch to start back-up source be put into (after the backup protection action far away, fault current disappears) on the fault bus because of low pressure.For the fault that load branch circuit takes place, after the then corresponding protection action, at once open all start-up criterion of device, tripping when to avoid successive failure.So for this field working conditions, the backup protection far away of working power inlet wire is long more operate time, this power direction locking criterion is good more to the selectivity of busbar fault and load branch circuit fault.
The 2nd, bus protection has been installed at the scene, does not perhaps have the risk of busbar fault substantially, then only considers to get final product greater than the load branch circuit operate time of protection.This moment, only when the branch protection tripping of load system, device withdrawed from the monitored state to load system.
Stand-by power supply drops into condition, and in conjunction with the accompanying drawings 11, take following steps:
Step S210, the bus dead electricity.
Step S220 judges whether frequency difference pressure reduction is out-of-limit, is then to enter not have the prepared auto restart of pressure logic S270, otherwise changes step S230 over to.Particularly, frequency difference Δ f is the 10Hz of rated frequency, and pressure differential deltap V is more than 60% of rated voltage, be then to enter next step S230, otherwise change traditional nothing over to and press prepared auto restart logic S270, wait for that promptly the voltage of all load systems reduces to zero, and then drop into stand-by power supply.
Step S230 judges whether house generator withdraws from load system, is then to enter step S240, otherwise enters step S231.Step S231 judges whether to satisfy the simultaneous interconnecting condition, is then to drop into stand-by power supply S260, otherwise returns step S220.Whether particularly, detecting has house generator to withdraw from load system, can be then to force house generator is withdrawed from load system and enters step S240, otherwise enter step S231 by whether detecting frequency difference Δ f greater than 3Hz.Step S231 judges whether to satisfy the simultaneous interconnecting condition, and promptly frequency difference Δ f is less than or equal to 3Hz, and the phase angle Δ θ of the phase angle of house generator and stand-by power supply then drops into stand-by power supply S260 if satisfy, otherwise returns step S220 near 0 °.
Step S240 judges whether synchronous motor withdraws from load system, is then to enter step S250, otherwise enters step S241.Step S241 judges whether to satisfy the synchronous motor power supply and drops into criterion, is then to drop into stand-by power supply S260, otherwise returns step S220.Particularly, whether have synchronous motor withdraw from load system, be then to enter step S250, otherwise enter step S241 if detecting.Step S241, judge whether to satisfy the synchronous motor power supply and drop into criterion, the frequency difference Δ f that promptly drops into moment is less than 5Hz, the port residual voltage is the voltage 60% greater than stand-by power supply at the place, connectivity port between bus and the load circuit, simultaneously frequency difference at Δ f less than 1Hz and angular difference Δ θ less than 65 °, perhaps frequency difference at Δ f less than 5Hz greater than 1Hz and angular difference Δ θ less than 30 °, then drop into stand-by power supply S260 if satisfy, otherwise return step S220.
Step S250 judges whether to satisfy the asynchronous electric power supply and drops into criterion, is then to drop into stand-by power supply S260, otherwise returns step S220.Particularly, load system voltage
And backup power source voltage
Homophase, stand-by power supply drop into the angular difference Δ θ of moment less than 90 °, are preferably 80 °, and the motor speed of load system is at more than 80% of rated value, and frequency difference then drops into stand-by power supply if satisfy, otherwise returns step S220 in 10Hz.
Whether house generator in the above-mentioned steps and synchronous motor withdraw from, be whether house generator and synchronous motor are arranged in the load system, can monitor load system by surveillance equipment judge whether house generator and synchronous motor are arranged in the load system.Guarantee that whole stand-by power supply drops into the fail safe and the success rate of process, key is that the operating condition by house generator and synchronous motor in the real time monitoring load system decides the input boundary.It is the loosest that the power supply of asynchronous motor drops into criterion simultaneously, if completely lose the opportunity that the lucid and lively speed of discontented sequitur drops into stand-by power supply.
In other embodiments, at least one step is set up among above-mentioned steps S230, step S240 and the step S250, then enters the step S260 that drops into stand-by power supply.Promptly, judge whether house generator withdraws from the step of load system, judge whether synchronous motor withdraws from the step of load system and judge whether to satisfy the step that the asynchronous electric power supply drops into criterion, and wherein at least one set up, and all satisfies the condition that stand-by power supply drops into.
This processing module 10 also comprises and is used for the described main processing block of opening into the instruction set of signal and control signal 11 of computing, and be used to handle described open into signal and control signal from processing module 12, be used to handle the data more, more complicated than traditional prepared auto restart system.This main processing block 11 is RISC MPU at a high speed, is used for electric current, voltage and frequency values are handled by the instruction set of judging; From processing module 12 is asic chip, is used for the electric current, voltage and the frequency values that collect are transferred to main processing block 11, perhaps receives the result of 11 pairs of these electric currents of main processing block, voltage and frequency values processing and generates control signal.
In other embodiments, the stand-by power supply switching device shifter also comprise be connected with processing module 10 leave signaling module 50, be used to the control signal that shows that processing module 10 is produced, as plant failure, switch finish, handoff failure, the position of the switch are unusual etc.This is left signaling module 50 and adopts photoelectricity coupling and small-sized sealing relay design, and contact rating is 220V/5A.
In other embodiments, the stand-by power supply switching device shifter also comprises the human-computer interaction module 60 that is connected with processing module 10, the operating state that is used to set the numerical value of relevant criterion or feeds back the stand-by power supply switching device shifter.
In other embodiments, the stand-by power supply switching device shifter also comprises the communication module 70 that is connected with processing module 10, is used for transmission signals, but far distance controlled and obtain this stand-by power supply switching device shifter state.This communication module 70 is Dual-Ethernet communication module, two RS485 communication module or wifi communication module etc.
In other embodiments, the stand-by power supply switching device shifter also comprises the clock module 80 that is connected with processing module 10, is used to correct the clock information of stand-by power supply switching device shifter, and it is timely and accurate to guarantee that power supply switches.Particularly, can correct clock information by GPS.
In other embodiments, the stand-by power supply switching device shifter also comprises the print module 90 that is connected with processing module 10, be used to print the parameter of stand-by power supply switching device shifter or the operating state of current stand-by power supply switching device shifter etc., for example electric current of Ce Lianging, voltage and frequency etc.
In other embodiments, the stand-by power supply switching device shifter also comprises the power module 100 that is connected with processing module 10, is used to the stand-by power supply switching device shifter that DC power supply is provided, and guarantees operate as normal.The power supply that provides comprises positive and negative 5V, 12V and 24V etc.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. a stand-by power supply switching device shifter is characterized in that, comprising: the sampling module of gathering electric current, voltage and the frequency values at least one road in supply line, stand-by power supply circuit, bus, load circuit and the branch road thereof; Opening into acquisition module into signal opened in collection; To described electric current, voltage and frequency values and the processing module of sending control signal after opening signal processing; Carry out the control module of leaving of control action according to described control signal; Described processing module respectively with sampling module, open into acquisition module and leave control module and be connected.
2. stand-by power supply switching device shifter according to claim 1, it is characterized in that, described processing module also comprises and is used for the described main processing block of opening into the instruction set of signal and control signal of computing, and be used to handle described open into signal and control signal from processing module.
3. stand-by power supply switching device shifter according to claim 2 is characterized in that, described main processing block is RISC MPU.
4. stand-by power supply switching device shifter according to claim 2 is characterized in that, described is asic chip from processing module.
5. stand-by power supply switching device shifter according to claim 2 is characterized in that, also comprises with processing module being connected, and is used to show the signaling module of leaving of control signal that processing module produces.
6. stand-by power supply switching device shifter according to claim 1 and 2 is characterized in that, also comprises with processing module being connected, and is used to correct the clock module of the clock information of stand-by power supply switching device shifter.
7. stand-by power supply switching device shifter according to claim 1 is characterized in that, also comprises with processing module being connected, and the human-computer interaction module that is used to set the numerical value of relevant criterion and/or feeds back the operating state of stand-by power supply switching device shifter.
8. stand-by power supply switching device shifter according to claim 1 is characterized in that, also comprises with processing module being connected, and is used for transmission signals, far distance controlled and obtains the communication module of described stand-by power supply switching device shifter state.
9. stand-by power supply switching device shifter according to claim 1 is characterized in that, also comprises with processing module being connected, and is used to print the print module of the parameter of stand-by power supply switching device shifter.
10. stand-by power supply switching device shifter according to claim 1 is characterized in that, also comprises with processing module being connected, and is used to the stand-by power supply switching device shifter that the power module of DC power supply is provided.
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|---|---|---|---|
| CN2010205081816U CN201789334U (en) | 2010-08-26 | 2010-08-26 | Standby power switching device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633730A (en) * | 2013-11-05 | 2014-03-12 | 国家电网公司 | Standby power supply automatic input system and method with inter-tripped loads |
| CN104300666A (en) * | 2014-10-24 | 2015-01-21 | 深圳市国立智能电力科技有限公司 | Quick non-disturbance house supply relaying control method based on high-speed communication network |
| CN105337405A (en) * | 2015-12-04 | 2016-02-17 | 国网浙江省电力公司绍兴供电公司 | Automatic bus transfer equipment control system with various collection functions |
| CN106099858B (en) * | 2016-05-23 | 2018-06-29 | 国电南瑞科技股份有限公司 | A kind of method for improving reverse-power in the generator protection precision |
| CN112803410A (en) * | 2021-03-25 | 2021-05-14 | 宁波钢铁有限公司 | Quick non-disturbance standby power supply relay control method |
-
2010
- 2010-08-26 CN CN2010205081816U patent/CN201789334U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633730A (en) * | 2013-11-05 | 2014-03-12 | 国家电网公司 | Standby power supply automatic input system and method with inter-tripped loads |
| CN104300666A (en) * | 2014-10-24 | 2015-01-21 | 深圳市国立智能电力科技有限公司 | Quick non-disturbance house supply relaying control method based on high-speed communication network |
| CN105337405A (en) * | 2015-12-04 | 2016-02-17 | 国网浙江省电力公司绍兴供电公司 | Automatic bus transfer equipment control system with various collection functions |
| CN106099858B (en) * | 2016-05-23 | 2018-06-29 | 国电南瑞科技股份有限公司 | A kind of method for improving reverse-power in the generator protection precision |
| CN112803410A (en) * | 2021-03-25 | 2021-05-14 | 宁波钢铁有限公司 | Quick non-disturbance standby power supply relay control method |
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