CN104539039A - Rapid switching device for 110kV power system of petrochemical enterprises - Google Patents
Rapid switching device for 110kV power system of petrochemical enterprises Download PDFInfo
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- CN104539039A CN104539039A CN201410698666.9A CN201410698666A CN104539039A CN 104539039 A CN104539039 A CN 104539039A CN 201410698666 A CN201410698666 A CN 201410698666A CN 104539039 A CN104539039 A CN 104539039A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Provided is a rapid switching device for a 110kV power supply system of petrochemical enterprises. The rapid switching device comprises a microcomputer chip, and the microcomputer chip determines whether a reverse power starting condition, a zero-current starting condition, a voltage-loss starting condition, a tripping error starting condition and a protection starting condition are satisfied; if the tripping error condition is satisfied, a switching operation is started, and whether the other conditions are satisfied are further determined successively; if any condition except the tripping error condition is satisfied, an incoming switch tripping command is emitted, the switching operation is started, and whether a rapid switching condition, a same-period capture switching condition, a residual voltage switching condition and a long delay switching condition are satisfied is determined successively; if one of the condition is satisfied, determination is stopped, and a corresponding switching command, namely a rapid switching command or a same-period capture switching command or a residual voltage switching command or a long time delay switching command, is transmitted. Thus, the 110kV power supply system of petrochemical enterprises can be stably switched between a working power supply and a standby power supply.
Description
Technical field
The present invention relates to a kind of apparatus for fast switching for petroleum chemical enterprise 110kV electric power system.
Background technology
Traditional prepared auto restart mode be outside circuit because of after the fault trips such as thunderbolt, by the mode of residual voltage on detection line, by in-put of spare power supply.
If Fig. 1 is certain 300MW unit 6KV bus residual voltage characteristic schematic diagram, V
dfor bus residual voltage, camber line ABCD represents bus residual voltage phasor variation track, and △ U is the differential pressure between backup power source voltage and bus residual voltage.
In order to the convenience analyzed, we get a power-supply system and single motor is example, standby power system and motor equivalent circuit are done fully to simplify by transient analysis model, ignore winding resistance, excitation impedance etc., with equivalent electromotive force V
swith equivalent reactance X
srepresent standby power system, with equivalent electromotive force V
mwith equivalent reactance X
mrepresent motor, as shown in Figure 2.
Due to single motor stator circuit open circuit after a loss of power, therefore its electromotive force V
mjust equal set end voltage, before stand-by power supply closes, V
m=V
d.After stand-by power supply closes, the voltage U that motor winding bears
mfor:
U
M＝X
M/(X
S+X
M)×(V
S－V
M)
Because of V
m=V
d, then (V
s-V
m)=(V
s-V
d)=△ U
So, U
m=X
m/ (X
s+ X
m) × △ U (1)
Make K=X
m/ (X
s+ X
m), then
U
M＝K△U
(2)
For ensureing motor safety, U
mthe permission starting voltage of motor should be less than, be set to 1.1 times of rated voltage U
de, then have:
K△U＜1.1U
De(3)
△U(％)＜1.1/K (4)
If X
s: X
m=1:2, K=0.67, then △ U (%) < 1.64.In Fig. 1, taking A as the center of circle, with 1.64 for radius draws camber line A'-A, the right side of ", then A'-A " is the safety zone that stand-by power supply allows to close a floodgate, and left side is then dangerous region.If get K=0.95, then B'-B in △ U (%) < 1.15, Fig. 1 " left side be dangerous region, K=0 ~ 1 in theory, visible K value is larger, and place of safety is less.
Assuming that working power and stand-by power supply homophase when normally running, its voltage phasor end points is A, then after bus dead electricity, residual voltage phasor end points will be moved to B direction along residual voltage curve by A, the stand-by power supply if close in A-B section, then can ensure motor safety, do not make again motor speed decline too many, Here it is switches fast, is optimal switching mode.
Crossing the rear BC section of B point is dangerous region, does not allow to switch.To the switching of CD section realization, time delay switching or short time delay switching is commonly referred to, the switching mode that this formal existing petroleum chemical enterprise prepared auto restart generally adopts after C point.Realize closing a floodgate in C-D section seizure bus residual voltage and backup power source voltage first time phase coincidence point, Here it is same-slope curve, switch relative to above-mentioned time delay switching or short time delay, when same-slope curve is owing to closing a floodgate, due to backup power source voltage and bus residual voltage two arc in phase, when stand-by power supply closes, impulse current is less, also substantially can not work the mischief to equipment and system.
The switching realized after busbar voltage decays to 20%-40% rated voltage is commonly referred to remnant voltage switch.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.And delayed transfer is to bear when whole load is not even enough to bear the self-starting by the load in remnant voltage switch past forced selection in the off-capacity of stand-by power supply.
The mode of above-mentioned remnant voltage switch, delayed transfer can cause the large-area underproduction of petroleum chemical enterprise, stopping production accident, causes huge loss, even may cause secondary fire explosion to the economic benefit of company.
The apparatus for fast switching of plant standby power supply can be implemented in very short time the load transfer plan that do not had a power failure, and is a kind of more satisfactory device.But because the electric power system inside of petroleum chemical enterprise is containing the large electric such as generator, synchronous motor equipment, larger difference is had with the classification of station-service electric equipment, motor as station-service is asynchronous motor, the apparatus for fast switching of what if the electric power system of petroleum chemical enterprise was simple apply mechanically plant standby power supply, be the safety that can not ensure the large electric equipment such as above-mentioned generator, synchronous motor during switching.
In addition, petrochemical system inside is containing equipment such as a lot of jumbo blower fan, compressors, these equipment are all the load that moment of inertia is larger, there is larger difference in the speed of decompression bus and the decay of fault bus residual voltage and the decompression bus residual voltage rate of decay of station service, setting and the station service of the setting value of apparatus for fast switching etc. also exist difference.
Fig. 1 is petroleum chemical enterprise's electric power system primary circuit sketch, bus I is powered by inlet wire 1, bus II is powered by inlet wire 2, be connected by bus connection switch 3DL between two buses I, II, M1 ~ M4 is loaded line, under normal circumstances, service entrance switch 1DL, 2DL are in closure state, and bus connection switch 3DL is in off-state.
Summary of the invention
Goal of the invention of the present invention is to provide the apparatus for fast switching that a kind of Neng Shi petroleum chemical enterprise 110kV electric power system steadily switches between its working power and stand-by power supply.
The present invention is achieved through the following technical solutions its goal of the invention: a kind of apparatus for fast switching for petroleum chemical enterprise 110kV electric power system, comprising:
Signal acquisition module: gather for as the voltage on the inlet wire circuit of power supply, electric current, power, frequency, service entrance switch and the status signal of incoming relay-protection device and the voltage signal of stand-by power supply;
Data conversion module: the output of signal acquisition module is converted to the digital signal that microcomputer chip can identify;
Microcomputer chip: judge whether to meet the following conditions according to described digital signal:
Inverse probability entry condition: the power of any phase inlet wire oppositely frequency △ fzd and the variable quantity > of this phase frequency adjusts in the three-phase inlet wire of described inlet wire circuit;
Without stream entry condition: the electric current of described inlet wire circuit three-phase inlet wire is all less than the nothing stream electric current I wl of setting and the variable quantity of three-phase frequency is all greater than the frequency △ fzd that adjusts;
Decompression entry condition: the voltage of described inlet wire circuit three-phase inlet wire is all less than voltage setting value Uzd and the duration is all greater than time setting value Tzd;
False tripping entry condition: the electric current of any phase of described inlet wire circuit three-phase inlet wire is less than the false tripping electric current I wt of setting and described service entrance switch tripping;
The condition that protection starts: described incoming relay-protection device starts;
If meet false tripping entry condition, then start handover operation, and from top to bottom judge whether further to meet:
If meet other arbitrary condition, then send and jump into wiretap order, and start handover operation, also from top to bottom judge whether further to meet:
Quick switching condition: the frequency difference of any phase voltage voltage waveform of corresponding phase with stand-by power supply of the fault bus be connected with the described inlet wire circuit of tripping is less than 1Hz, and angular difference is less than 20 degree;
Same-slope curve condition: the frequency difference of any phase voltage voltage waveform of corresponding phase with stand-by power supply of the fault bus be connected with the described inlet wire circuit of tripping is less than 1.5Hz, and angular difference is less than 30 degree;
The condition of remnant voltage switch: the voltage < 40% fault bus rated voltage Un of the fault bus be connected with the described inlet wire circuit of tripping;
Delayed transfer condition: time delay 7 seconds after starting from described handover operation, the electric current <0.5A of the fault bus be connected with the described inlet wire circuit of tripping;
Satisfied then stop follow-up judgement and send corresponding switching command and quick switching command or same-slope curve order or remnant voltage switch order or delayed transfer order, wherein, remnant voltage switch time delay 0.5 second;
Switching actuator: receive microcomputer chip jump into wiretap order after, perform the operation of service entrance switch described in tripping, and after receiving the switching command of microcomputer chip, perform and close stand-by power supply operation.
Described stand-by power supply can be the bus normally run be connected by bus connection switch with described fault bus, also can be a spare transformer started.
The recommendation span of above-mentioned parameter is: △ fzd span is 0.02 ~ 0.5HZ, Iwl span is 0.5 ~ 2A, Uzd span is 20% ~ 90% inlet wire circuit rated voltage, and Tzd span is 0.1 ~ ~ 5 second, and Iwt span is 0.5 ~ 2A.
Optimize as to one of the present invention, described microcomputer chip comprises master chip and from chip, main, be connected from chip by SPI (abbreviation of Serial Peripheral Interface) bus, described data conversion module is all connected with described master chip with described switching actuator, on described master chip, the RS232 be also provided with for being connected with computer communicates debug port, described interface when chip is provided with GPS couple, keyboard interface, display interface device, printing interface, to communicate with the RS232 for being connected computer debug port for two 485 communication interfaces being connected with Power Plant DCS System.
The microcomputer chip being used for Logic judgment separates with the microcomputer chip being used for being connected external equipment by the present invention, is conducive to the processing speed improving master chip.
Relative to prior art, the present invention has following beneficial effect: the fault state discovering working power that apparatus for fast switching of the present invention can be sharp, rapid excision, and judge that the best opportunity of input stand-by power supply carries out being switched to the operation of stand-by power supply, experiment proves, the switching that the present invention can control petroleum chemical enterprise 110kV work of electric power system power supply and stand-by power supply is substantially all to switch fast or the mode of same-slope curve is carried out, wherein fast transfer mode accounts for more than 90%, not only can avoid fluctuating the stopping production caused due to system power supply, the problems such as the underproduction, and the generator in enterprise of handoff procedure China Petrochemical Industry, the large electric equipment such as large synchronous machine all realize a smooth transition, vibrate without amplitude, maintain a good state, fully ensure that the safety of these main equipments, really achieve the transfer that do not have a power failure of petroleum chemical enterprise 110kV work of electric power system power supply, in addition, even if switch fast cannot taking of may occurring or same-slope curve and the situation of remnant voltage switch or delayed transfer must be carried out, the present invention has also taken into full account the feature of petroleum chemical enterprise's electric power system, time delay switching is carried out again, fully to ensure the safety of the large electric equipment such as above-mentioned generator, large synchronous machine after being strict controlled in busbar voltage or current attenuation to certain value.
Accompanying drawing explanation
Fig. 1 is certain 300MW unit 6KV bus residual voltage characteristic schematic diagram;
Fig. 2 is the analysis of shift model of single motor;
Fig. 3 is for being petroleum chemical enterprise's electric power system primary circuit sketch;
Fig. 4 is the theory diagram of apparatus for fast switching of the present invention;
Fig. 5 is the decision logic figure of the microcomputer chip of apparatus for fast switching of the present invention;
Fig. 6 is the microcomputer chip connection diagram of apparatus for fast switching of the present invention.
Embodiment
Below in conjunction with Fig. 3 ~ 6, the invention will be further described:
Apparatus for fast switching for petroleum chemical enterprise 110kV electric power system of the present invention, comprising:
Signal acquisition module: for gathering voltage U a, Ub on inlet wire, Uc, electric current I a, Ib, Ic, power P a, Pb, Pc, frequency f a, fb, fc, service entrance switch 1DL and the status signal of incoming relay-protection device 4DL and the voltage signal of fault bus voltage, current signal and stand-by power supply;
Data conversion module: the output of signal acquisition module is converted to the digital signal that microcomputer chip can identify;
Microcomputer chip: carry out judging and send jumping into wiretap order and switching command according to described digital signal;
Switching actuator: receive microcomputer chip jump into wiretap order after, perform the operation of service entrance switch described in tripping, and after receiving the switching command of microcomputer chip, perform and close stand-by power supply operation.
As shown in Figure 3, the present embodiment selects the bus II be connected by bus connection switch 3DL with bus I as stand-by power supply, and inlet wire 1 is the working power of bus 1.
The judgement operation that microcomputer chip specifically carries out is as follows:
Microcomputer chip judges whether to meet the following conditions according to the digital signal that data conversion module exports:
As shown in Figure 5, inverse probability entry condition: the power P a of any phase A phase or B phase or C phase inlet wire or Pb or the Pc oppositely frequency △ fzd and the variable quantity △ f> of this phase frequency adjusts in the three-phase inlet wire of inlet wire 1;
Without stream entry condition: the electric current I a of inlet wire 1 three-phase inlet wire A phase, B phase and C phase, Ib, Ic are all less than the nothing stream electric current I wl of setting and the variable quantity of three-phase frequency f a, fb and fc is all greater than the frequency △ fzd that adjusts;
Decompression entry condition: voltage U a, Ub and Uc of inlet wire 1 three-phase inlet wire A phase, B phase and C phase are all less than voltage setting value Uzd and the duration is all greater than time setting value Tzd;
False tripping entry condition: the electric current I a of the A phase that inlet wire 1 three-phase inlet wire A phase, B phase are enumerated as Fig. 5 with C phase any is less than the false tripping electric current I wt of setting and service entrance switch 1DL tripping;
The condition that protection starts: incoming relay-protection device 4DL starts;
If meet false tripping entry condition, then start handover operation, and from top to bottom judge whether further to meet:
If meet other arbitrary condition, then send and jump into wiretap 1DL order, and start handover operation, also from top to bottom judge whether further to meet:
Quick switching condition: with any one of the fault bus that the inlet wire 1 of tripping is connected and bus I as A phase voltage and stand-by power supply and bus II corresponding be that the frequency difference of the voltage waveform of A phase is less than 1Hz mutually, and angular difference is less than 20 degree;
Any phase voltage such as the A phase and the frequency difference of the voltage waveform of bus II A phase of same-slope curve condition bus I are less than 1.5Hz, and angular difference is less than 30 degree;
The condition of remnant voltage switch: the voltage < 40% bus I rated voltage Un of bus I;
Delayed transfer condition: time delay 7 seconds after starting from described handover operation, the electric current <0.5A of bus I; (setting of dual Rule of judgment is conducive to the generation preventing long delay maloperation situation.)
Satisfied then stop follow-up judgement and send corresponding switching command and quick switching command or same-slope curve order or remnant voltage switch order or delayed transfer order, wherein, remnant voltage switch time delay 0.5 second.
The present invention is directed to petroleum chemical enterprise's feature, multiple entry condition is set, considers comprehensively, to make apparatus for fast switching of the present invention have very high sensitivity and accuracy, the abnormal conditions of electric power system can be discovered fast, make device have higher quick handover success probability.
Quick switching, same-slope curve, remnant voltage switch, delayed transfer are all existing switching mode.
As shown in Figure 6, microcomputer chip comprise main CPU system in master chip and Fig. 6 and from chip and Fig. 6 from cpu system, master and slave chip is connected by spi bus.The of ac such as voltage, electric current of signal acquisition module collection outputs to the dsp system of data conversion module; the service entrance switch of signal acquisition module collection, the on-off model of incoming relay-protection device output to the photoisolator of data conversion module; data conversion module is connected with master chip; master chip is also connected with signal relay by the exit relay of photoisolator with switching actuator; with the combined floodgate of the tripping and bus connection switch 3DL that control service entrance switch 1DL, master chip is also connected with portable computer by RS232 communication debug port.Interface when chip is provided with GPS couple, keyboard interface, display interface device, printing interface, to communicate with the RS232 for being connected computer for two 485 communication interfaces being connected with Power Plant DCS System debug port.The microcomputer chip being used for Logic judgment separates with the microcomputer chip being used for being connected external equipment by the present invention, is conducive to the processing speed improving master chip.
2010 there are 6 faults in petrochemical industry electric power system 110kV inlet wire altogether, and the equal successful switch of apparatus for fast switching, switching time is within 150ms.During switching, the main equipment such as generator, synchronous motor all realizes a smooth transition, relevant apparatus is not also affected as produced pump, the fluctuation avoided due to system power supply causes the problems such as stopping production, the underproduction, achieve the transfer that do not have a power failure of load, following table 1 is the action situation of apparatus for fast switching in 2010:
Table 1
Above 6 actions, fault bus all hangs with house generator, and generator load is slightly less than power load, accounts for about 80 ~ 90%, does not jump generator, complete switching with generator during systematic evaluation with generator.
Claims (4)
1. for an apparatus for fast switching for petroleum chemical enterprise 110kV electric power system, it is characterized in that, comprising:
Signal acquisition module: gather for as the voltage on the inlet wire circuit of power supply, electric current, power, frequency, service entrance switch and the status signal of incoming relay-protection device and the voltage signal of stand-by power supply;
Data conversion module: the output of signal acquisition module is converted to the digital signal that microcomputer chip can identify;
Microcomputer chip: judge whether to meet the following conditions according to described digital signal:
Inverse probability entry condition: the power of any phase inlet wire oppositely frequency △ fzd and the variable quantity > of this phase frequency adjusts in the three-phase inlet wire of described inlet wire circuit;
Without stream entry condition: the electric current of described inlet wire circuit three-phase inlet wire is all less than the nothing stream electric current I wl of setting and the variable quantity of three-phase frequency is all greater than the frequency △ fzd that adjusts;
Decompression entry condition: the voltage of described inlet wire circuit three-phase inlet wire is all less than voltage setting value Uzd and the duration is all greater than time setting value Tzd;
False tripping entry condition: the electric current of any phase of described inlet wire circuit three-phase inlet wire is less than the false tripping electric current I wt of setting and described service entrance switch tripping;
The condition that protection starts: described incoming relay-protection device starts;
If meet false tripping entry condition, then start handover operation, and from top to bottom judge whether further to meet:
If meet other arbitrary condition, then send and jump into wiretap order, and start handover operation, also from top to bottom judge whether further to meet:
Quick switching condition: the frequency difference of any phase voltage voltage waveform of corresponding phase with stand-by power supply of the fault bus be connected with the described inlet wire circuit of tripping is less than 1Hz, and angular difference is less than 20 degree;
Same-slope curve condition: the frequency difference of any phase voltage voltage waveform of corresponding phase with stand-by power supply of the fault bus be connected with the described inlet wire circuit of tripping is less than 1.5Hz, and angular difference is less than 30 degree;
The condition of remnant voltage switch: the voltage < 40% fault bus rated voltage Un of the fault bus be connected with the described inlet wire circuit of tripping;
Delayed transfer condition: time delay 7 seconds after starting from described handover operation, the electric current <0.5A of the fault bus be connected with the described inlet wire circuit of tripping;
Satisfied then stop follow-up judgement and send corresponding switching command and quick switching command or same-slope curve order or remnant voltage switch order or delayed transfer order, wherein, remnant voltage switch order time delay 0.5 second;
Switching actuator: receive microcomputer chip jump into wiretap order after, perform the operation of service entrance switch described in tripping, and after receiving the switching command of microcomputer chip, perform and close stand-by power supply operation.
2. the apparatus for fast switching for petroleum chemical enterprise 110kV electric power system according to claim 1, it is characterized in that, described △ fzd span is 0.02 ~ 0.5HZ, described Iwl span is 0.5 ~ 2A, described Uzd span is 20% ~ 90% inlet wire circuit rated voltage, described Tzd span is 0.1 ~ ~ 5 second, and described Iwt span is 0.5 ~ 2A.
3. the apparatus for fast switching for petroleum chemical enterprise 110kV electric power system according to claim 2, it is characterized in that, described stand-by power supply is the bus normally run be connected by bus connection switch with described fault bus, or a spare transformer started.
4. the apparatus for fast switching for petroleum chemical enterprise 110kV electric power system according to claim 3, it is characterized in that, described microcomputer chip comprises master chip and from chip, main, be connected from chip by spi bus, described data conversion module is all connected with described master chip with described switching actuator, on described master chip, the RS232 be also provided with for being connected with computer communicates debug port, described interface when chip is provided with GPS couple, keyboard interface, display interface device, printing interface, to communicate with the RS232 for being connected computer debug port for two 485 communication interfaces being connected with Power Plant DCS System.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698666.9A CN104539039A (en) | 2014-11-27 | 2014-11-27 | Rapid switching device for 110kV power system of petrochemical enterprises |
| CN201510850235.4A CN105406581B (en) | 2014-11-27 | 2015-11-27 | Fast switch over method and device for petroleum chemical enterprise's electric system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698666.9A CN104539039A (en) | 2014-11-27 | 2014-11-27 | Rapid switching device for 110kV power system of petrochemical enterprises |
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| Publication Number | Publication Date |
|---|---|
| CN104539039A true CN104539039A (en) | 2015-04-22 |
Family
ID=52854529
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410698666.9A Withdrawn CN104539039A (en) | 2014-11-27 | 2014-11-27 | Rapid switching device for 110kV power system of petrochemical enterprises |
| CN201510850235.4A Active CN105406581B (en) | 2014-11-27 | 2015-11-27 | Fast switch over method and device for petroleum chemical enterprise's electric system |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510850235.4A Active CN105406581B (en) | 2014-11-27 | 2015-11-27 | Fast switch over method and device for petroleum chemical enterprise's electric system |
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| Country | Link |
|---|---|
| CN (2) | CN104539039A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967210A (en) * | 2015-06-17 | 2015-10-07 | 中国石油大学(北京) | Double-power-supply voltage difference first-time zero-crossing phase-splitting switching control device and method |
| CN107834690A (en) * | 2017-10-20 | 2018-03-23 | 中国石油化工集团公司 | Upper and lower level apparatus for fast switching interlock method and linked system |
| CN108879936A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of four power supply fast switching devices |
| CN110460047A (en) * | 2019-08-15 | 2019-11-15 | 中广核研究院有限公司 | The power-supply switching method and system of AC system are pressed in a kind of atomic-powered ship |
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| CN108345706B (en) * | 2017-01-24 | 2021-10-08 | 中国石油化工股份有限公司 | Power supply fast switching simulation method and model |
| CN110034604A (en) * | 2019-04-18 | 2019-07-19 | 徐州矿达机电科技有限公司 | A kind of dual power supply fast switching system |
| CN111817429A (en) * | 2020-07-23 | 2020-10-23 | 西门子股份公司 | Method and apparatus for power supply switching in power system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008061351A (en) * | 2006-08-30 | 2008-03-13 | Toshiba Corp | Power supply switching system |
| CN101917058B (en) * | 2010-08-26 | 2013-05-01 | 深圳市国立智能电力科技有限公司 | Method and system for switching backup power supply |
-
2014
- 2014-11-27 CN CN201410698666.9A patent/CN104539039A/en not_active Withdrawn
-
2015
- 2015-11-27 CN CN201510850235.4A patent/CN105406581B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967210A (en) * | 2015-06-17 | 2015-10-07 | 中国石油大学(北京) | Double-power-supply voltage difference first-time zero-crossing phase-splitting switching control device and method |
| CN108879936A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of four power supply fast switching devices |
| CN107834690A (en) * | 2017-10-20 | 2018-03-23 | 中国石油化工集团公司 | Upper and lower level apparatus for fast switching interlock method and linked system |
| CN107834690B (en) * | 2017-10-20 | 2020-09-01 | 中国石油化工集团公司 | Linkage method and linkage system for upper and lower rapid switching devices |
| CN110460047A (en) * | 2019-08-15 | 2019-11-15 | 中广核研究院有限公司 | The power-supply switching method and system of AC system are pressed in a kind of atomic-powered ship |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105406581B (en) | 2019-04-02 |
| CN105406581A (en) | 2016-03-16 |
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Application publication date: 20150422 |