CN105182898A - Hydropower PLC intelligent control system - Google Patents
Hydropower PLC intelligent control system Download PDFInfo
- Publication number
- CN105182898A CN105182898A CN201510626679.XA CN201510626679A CN105182898A CN 105182898 A CN105182898 A CN 105182898A CN 201510626679 A CN201510626679 A CN 201510626679A CN 105182898 A CN105182898 A CN 105182898A
- Authority
- CN
- China
- Prior art keywords
- power
- sensor
- grid
- control system
- water level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a hydropower PLC intelligent control system, which comprises a program control processor, a power grid parameter sensor, a power generation parameter sensor, a simultaneous detection sensor, a power generator rotation speed sensor, a grid-connected contactor, an external button, a water level height sensor, a bearing temperature sensor, a water valve adjustment executor, an excitation controller, a touch screen, an internet of things server, a short message sensing device, and a backup power supply. The hydropower PLC intelligent control system has the beneficial effects that the controlled is adopted for concentrated control, decentralized collection is realized, and one-button start and automatic grid connection are carried out steadily and quickly; water level automatic tracking is set, and water level overflow is eliminated; data can be clearly and intuitively displayed, and different needed parameters can be set for automatic control; the rotation speed and the power grid condition can be monitored, and multiple protection mechanisms such as the backup power supply are quick and effective; intuitive display of the power grid and power generation parameters can be realized, and the current real-time power rotation speed of the power generator can be detected; and operation of the equipment can be monitored and controlled via each terminal in a place with network globally.
Description
Technical field
The invention belongs to hydroelectric project field, be specifically related to a kind of water power PLC intelligent control system.
Background technology
Electric power is modernization commercial production and indispensable power capacity of living, and hydropower is a class of power industry.Found the state over more than 60 year, the hydropower of China has had significant progress, achieves the achievement attracted people's attention.But also there are the following problems for the middle-size and small-size water-power plant of China's major part:
1, full manual operation, time grid-connected, manual rotation's water valve, and supervises instrument, and during close to the same period, should finely tune water valve, also will finely tune field voltage, the more difficult grasp of manpower comparing.
2, by seeing the state of pilot lamp, manually will press switch knob during the same period, be difficult to opportunity grasp, easily failure, the good old electrician master worker of technology to operate.
3, water valve is by artificial adjustment, and water level situation is learnt by monitoring or the instruction of water float switch, and under general status, for the sake of assurance, less than normal by valve regulated, in particularly evening, so often has water spilling, cause water resource waste workman.
4, power factor adjustment is by regulating the adjustment of field voltage, and on-the-spot test finds, most power factor meter is forbidden, and the linearity is poor; On the other hand, along with the fluctuation of voltage, field voltage also can fluctuate thereupon, cannot accomplish that real-time follow-up regulates time artificial, has a lot of reactive energies like this and sends, produce certain impact to the quality of whole electric energy.
5, when grid power blackout or excitation system are damaged, can not shut down in time, cause runaway accident, workman's moment watchful, monitor operation conditions.
6, reservoir barrier blockage is difficult to grasp.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of water power PLC intelligent control system, the function such as driving protection, rapid combination, water level adjustment tracking, remote monitoring can be realized by native system.
The present invention for the technical scheme reaching above-mentioned technical purpose and adopt is: a kind of water power PLC intelligent control system, comprising:
Program-controUed processor, as the core processor of native system, processes the information that various sensor detects, and controls the action of whole system;
Electrical network parameter sensor, can the parameter of detection of grid in real time, the electrical quantitys such as voltage, electric current, frequency, power, power factor, electric degree;
Generating parameter sensors, can detect the generating parameter of generator, voltage, electric current, frequency etc. in real time;
Synchronized detection sensor, on the opportunity same period be used for when detecting grid-connected, completes auto-parallel;
Generator speed sensor, the running speed of real-time prosecution generator;
Grid-connected contactor is the crucial link that generator outputs to electrical network;
Outer button, conventional operation part, comprises out, shutdown operation;
Height of water level sensor, for monitoring reservoir level;
Bearing temperature sensor, for monitoring dynamo bearing temperature;
Penstock adjusting actuator is the key component of regulator generator generated energy;
Excitation controller is the parts of regulator generator excitation, plays power factor and follow the tracks of the effect regulated after grid-connected;
Touch-screen, is interactive window, shows, information displaying for various parameter manipulation, the operation of partial act, and the record etc. of acquisition parameter;
Internet of Things server, by it by the data message of equipment and internet UNICOM, realizes having the place of network to monitor the operation with opertaing device by each terminal in the whole world;
Short message sending equipment, is used for, by generated energy every day, informing householder in the mode of note;
Standby power supply, the system of can be provides reliable guarantee, when whole system occurs abnormal, when power supply (15) has a power failure, continual power supply supply can be provided for system, with reach any situation can safety carry out water valve closing motion, ensure the safety of unit;
When generator speed being detected higher than rated speed 10% by generator speed sensor, program-controUed processor sends instruction by penstock adjusting actuator valve-off, realize driving protection, standby power supply can guarantee that control system also has electricity to complete all emergency operations when power outage;
When starting shooting grid-connected, valve is reached setting valve position by penstock adjusting actuator by system, question generator rotating speed rises, the real-time speed that control system detects according to generator speed sensor sends instruction to penstock adjusting actuator, when real-time rotate speed is lower than rated speed, opens large valve, rotating speed rises, when real-time rotate speed is higher than rated speed, close minor valve, rotating speed declines; Control system contrasts electrical network parameter sensor and the generating voltage passed back of parameter sensors and frequency, when frequency departure is less than certain setting value a between the two, excitation controller carries out rapid adjustment voluntarily and exports excitation, voltage difference is between the two adjusted to and is less than certain setting value b, the arrival waiting for homophase opportunity in the meantime, when synchronized detection sensor detects that both phase places are less than certain setting value c, control system sends grid-connected signal, grid-connected contactor action, realizes rapid combination function;
The water level information that program-controUed processor transmits according to height of water level sensor sends instruction to penstock adjusting actuator, and when water level is greater than full-water level, valve is opened to maximum, and the power that unit sends is maximum; When water level is in upper limit lower range, valve is driveed to appropriate location, and unit adjusts to this season average power, within the scope of bound, only finely tunes; When water level is low to moderate warning line, time delay 60S is shut down; In the process, excitation controller, automatically by power factor adjustment, when power factor ∮ is less than certain setting value d, reduces field voltage; When power factor ∮ is greater than certain setting value e, increase field voltage;
In operational process, control system according to SEA LEVEL VARIATION situation, current power and current valve position, can calculate the jam situation of reservoir barrier automatically, and the teaching process person that can give a warning when heavy congestion carries out cleaning operation.
Native system can realize multicomputer parallel operation, carries out automatic governing electricity generating plan, allocates suitable unit operation according to regimen.
Compared with prior art, the invention has the beneficial effects as follows: the present invention adopts controller centralized control, distributed collection, can carry out a key startup, auto-parallel, steadily fast, operate safer, avoid manual operation, when opportunity holds bad, produce the security incidents such as short circuit tripping operation; Be provided with water level from motion tracking, stop water level overflow; Excitation automatic tracking module, prevents manual operation not in time, sends too many reactive energy; Clear and intuitive data display, the different parameters that can set needs controls automatically; Rotation speed monitoring, grid condition, the multiple protection mechanism such as standby power supply, fast effectively; The display directly perceived of electrical network and generating parameter can be realized, current real-time generator speed can be detected; Can realize having the place of network to monitor the operation with opertaing device by each terminal in the whole world.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.Wherein:
Fig. 1 is a kind of water power PLC of the present invention intelligent control system theory diagram;
Fig. 2 is a kind of water power PLC of the present invention intelligent control system control system process flow diagram;
Fig. 3 is a kind of water power PLC of the present invention intelligent control system runaway process flow diagram;
Fig. 4 is the grid-connected process flow diagram of a kind of water power PLC intelligent control system of the present invention;
Fig. 5 is that a kind of water power PLC of the present invention intelligent control system water level regulates process flow diagram.
Embodiment
Embodiments of the invention, as shown in Figure 1 and Figure 2, a kind of water power PLC intelligent control system, comprising:
Program-controUed processor (1), as the core processor of native system, processes the information that various sensor detects, and controls the action of whole system;
Electrical network parameter sensor (2), can the parameter of detection of grid in real time, the electrical quantitys such as voltage, electric current, frequency, power, power factor, electric degree;
Generating parameter sensors (3), can detect the generating parameter of generator, voltage, electric current, frequency etc. in real time;
Synchronized detection sensor (4), on the opportunity same period be used for when detecting grid-connected, completes auto-parallel;
Generator speed sensor (5), the running speed of real-time prosecution generator;
Grid-connected contactor (10) is the crucial link that generator outputs to electrical network;
Outer button (13), conventional operation part, comprises out, shutdown operation;
Height of water level sensor (6), for monitoring reservoir level;
Bearing temperature sensor (7), for monitoring dynamo bearing temperature;
Penstock adjusting actuator (9) is the key component of regulator generator generated energy;
Excitation controller (8) is the parts of regulator generator excitation, plays power factor and follow the tracks of the effect regulated after grid-connected;
Touch-screen (14), is interactive window, shows, information displaying for various parameter manipulation, the operation of partial act, and the record etc. of acquisition parameter;
Internet of Things server (11), by it by the data message of equipment and internet UNICOM, realizes having the place of network to monitor the operation with opertaing device by each terminal in the whole world;
Short message sending equipment (12), is used for, by generated energy every day, informing householder in the mode of note;
Standby power supply (16), the system of can be provides reliable guarantee, when whole system occurs abnormal, when power supply (15) has a power failure, continual power supply supply can be provided for system, with reach any situation can safety carry out water valve closing motion, ensure the safety of unit;
Runaway flow process is shown in Fig. 3, when generator speed being detected higher than rated speed 10% by generator speed sensor (5), program-controUed processor (1) sends instruction by penstock adjusting actuator (9) valve-off, realize driving protection, standby power supply (16) can guarantee that control system also has electricity to complete all emergency operations when power supply (15) has a power failure;
Rapid combination flow process is shown in Fig. 4, when starting shooting grid-connected, valve is reached setting valve position by penstock adjusting actuator (9) by system, and question generator rotating speed rises, and the real-time speed that control system detects according to generator speed sensor (5) sends instruction to penstock adjusting actuator (9), when real-time rotate speed is lower than rated speed, open large valve, rotating speed rises, when real-time rotate speed is higher than rated speed, close minor valve, rotating speed declines, control system contrasts electrical network parameter sensor (2) and generating parameter sensors (3) voltage passed back and frequency, when frequency departure is less than certain setting value a between the two, excitation controller (8) carries out rapid adjustment voluntarily and exports excitation, voltage difference is between the two adjusted to and is less than certain setting value b, the arrival waiting for homophase opportunity in the meantime, when synchronized detection sensor (4) detects that both phase places are less than certain setting value c, control system sends grid-connected signal, grid-connected contactor (10) action, realize rapid combination function (a, b, c tri-value is less, grid-connected more steady, impact less),
Water level regulates flow process to see Fig. 5, the water level information that program-controUed processor (1) transmits according to height of water level sensor (6) sends instruction to penstock adjusting actuator (9), when water level is greater than full-water level, valve is opened to maximum, and the power that unit sends is maximum; When water level is in upper limit lower range, valve is driveed to appropriate location, and unit adjusts to this season average power, within the scope of bound, only finely tunes; When water level is low to moderate warning line, time delay 60S is shut down; In the process, excitation controller (8), automatically by power factor adjustment, when power factor ∮ is less than certain setting value d, reduces field voltage; When power factor ∮ is greater than certain setting value e, increase field voltage (general setting d is 0.97, e is 0.99);
In operational process, control system according to SEA LEVEL VARIATION situation, current power and current valve position, can calculate the jam situation of reservoir barrier automatically, and the teaching process person that can give a warning when heavy congestion carries out cleaning operation.
Native system can realize multicomputer parallel operation, carries out automatic governing electricity generating plan, allocates suitable unit operation according to regimen.During if any large and small two unit, when carrying out the water yield hour, open little unit, come the water yield large time open large-sized unit or two units with opening.
During whole service, system by touch-screen, the parameters of moment monitoring electrical network, generating and generator: voltage, electric current, frequency, excitation, rotating speed, water level, bearing temperature etc.When having abnormal, carry out separating brake immediately, the operations such as Guan Shui, thus the safety of reliably protecting unit.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (2)
1. a water power PLC intelligent control system, comprising:
Program-controUed processor (1), as the core processor of native system, processes the information that various sensor detects, and controls the action of whole system;
Electrical network parameter sensor (2), can the parameter of detection of grid in real time, the electrical quantitys such as voltage, electric current, frequency, power, power factor, electric degree;
Generating parameter sensors (3), can detect the generating parameter of generator, voltage, electric current, frequency etc. in real time;
Synchronized detection sensor (4), on the opportunity same period be used for when detecting grid-connected, completes auto-parallel;
Generator speed sensor (5), the running speed of real-time prosecution generator;
Grid-connected contactor (10) is the crucial link that generator outputs to electrical network;
Outer button (13), conventional operation part, comprises out, shutdown operation;
Height of water level sensor (6), for monitoring reservoir level;
Bearing temperature sensor (7), for monitoring dynamo bearing temperature;
Penstock adjusting actuator (9) is the key component of regulator generator generated energy;
Excitation controller (8) is the parts of regulator generator excitation, plays power factor and follow the tracks of the effect regulated after grid-connected;
Touch-screen (14), is interactive window, shows, information displaying for various parameter manipulation, the operation of partial act, and the record etc. of acquisition parameter;
Internet of Things server (11), by it by the data message of equipment and internet UNICOM, realizes having the place of network to monitor the operation with opertaing device by each terminal in the whole world;
Short message sending equipment (12), is used for, by generated energy every day, informing householder in the mode of note;
Standby power supply (16), the system of can be provides reliable guarantee, when power supply (15) has a power failure, can provide continual power supply supply for system, with reach any situation can safety carry out water valve closing motion, ensure the safety of unit;
When generator speed being detected higher than rated speed 10% by generator speed sensor (5), program-controUed processor (1) sends instruction by penstock adjusting actuator (9) valve-off, realize driving protection, standby power supply (16) can guarantee that control system also has electricity to complete all emergency operations when power supply (15) has a power failure;
When starting shooting grid-connected, valve is reached setting valve position by penstock adjusting actuator (9) by system, question generator rotating speed rises, the real-time speed that control system detects according to generator speed sensor (5) sends instruction to penstock adjusting actuator (9), when real-time rotate speed is lower than rated speed, opens large valve, rotating speed rises, when real-time rotate speed is higher than rated speed, close minor valve, rotating speed declines; Control system contrasts electrical network parameter sensor (2) and generating parameter sensors (3) voltage passed back and frequency, when frequency departure is less than certain setting value a between the two, excitation controller (8) carries out rapid adjustment voluntarily and exports excitation, voltage difference is between the two adjusted to and is less than certain setting value b, the arrival waiting for homophase opportunity in the meantime, when synchronized detection sensor (4) detects that both phase places are less than certain setting value c, control system sends grid-connected signal, grid-connected contactor (10) action, realizes rapid combination function;
The water level information that program-controUed processor (1) transmits according to height of water level sensor (6) sends instruction to penstock adjusting actuator (9), when water level is greater than full-water level, valve is opened to maximum, and the power that unit sends is maximum; When water level is in upper limit lower range, valve is driveed to appropriate location, and unit adjusts to this season average power, within the scope of bound, only finely tunes; When water level is low to moderate warning line, time delay 60S is shut down; In the process, excitation controller (8), automatically by power factor adjustment, when power factor ∮ is less than certain setting value d, reduces field voltage; When power factor ∮ is greater than certain setting value e, increase field voltage;
In operational process, control system according to SEA LEVEL VARIATION situation, current power and current valve position, can calculate the jam situation of reservoir barrier automatically, and the teaching process person that can give a warning when heavy congestion carries out cleaning operation.
2. a kind of water power PLC intelligent control system according to claim 1, is characterized in that: native system can realize multicomputer parallel operation, carries out automatic governing electricity generating plan, allocates suitable unit operation according to regimen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510626679.XA CN105182898A (en) | 2015-09-28 | 2015-09-28 | Hydropower PLC intelligent control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510626679.XA CN105182898A (en) | 2015-09-28 | 2015-09-28 | Hydropower PLC intelligent control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105182898A true CN105182898A (en) | 2015-12-23 |
Family
ID=54905042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510626679.XA Pending CN105182898A (en) | 2015-09-28 | 2015-09-28 | Hydropower PLC intelligent control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105182898A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628245A (en) * | 2018-06-27 | 2018-10-09 | 北京鉴衡认证中心有限公司 | Wind generating set data acquisition system based on block chain |
| CN110233491A (en) * | 2018-09-27 | 2019-09-13 | 襄阳航力机电技术发展有限公司 | A kind of hydrogen peroxide tail gas top pressure power generation combination method and its control system |
| CN110661290A (en) * | 2019-09-19 | 2020-01-07 | 泰安阳光动力电机有限公司 | Low-water-head hydropower intelligent control system and method |
| CN112127841A (en) * | 2020-10-23 | 2020-12-25 | 陕西昆鹏能源科技有限公司 | Intelligent power generation device for pressure difference in oil-gas well |
| CN112214043A (en) * | 2020-10-26 | 2021-01-12 | 武汉欧立德电气有限公司 | Remote water level control system of hydropower station based on Internet of things |
| CN114583753A (en) * | 2022-03-11 | 2022-06-03 | 贵州一和科技有限公司 | Water and electricity remote automatic control system based on Internet of things |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7860808B2 (en) * | 2006-01-05 | 2010-12-28 | International Business Machines Corporation | System and method for hybrid conservation of fossil fuel |
| CN202215422U (en) * | 2011-08-30 | 2012-05-09 | 成都锐达自动控制有限公司 | Intelligent oil pressure control system for hydroelectric power station governor |
| CN203133527U (en) * | 2012-11-30 | 2013-08-14 | 广东省水利水电科学研究院 | Set intelligent control system for small hydropower station |
| IN2014CH00504A (en) * | 2014-02-04 | 2015-08-28 | Tvs Motor Co Ltd | |
| CN104935228A (en) * | 2015-07-17 | 2015-09-23 | 李红 | Hydropower intelligent control system and control method |
-
2015
- 2015-09-28 CN CN201510626679.XA patent/CN105182898A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7860808B2 (en) * | 2006-01-05 | 2010-12-28 | International Business Machines Corporation | System and method for hybrid conservation of fossil fuel |
| CN202215422U (en) * | 2011-08-30 | 2012-05-09 | 成都锐达自动控制有限公司 | Intelligent oil pressure control system for hydroelectric power station governor |
| CN203133527U (en) * | 2012-11-30 | 2013-08-14 | 广东省水利水电科学研究院 | Set intelligent control system for small hydropower station |
| IN2014CH00504A (en) * | 2014-02-04 | 2015-08-28 | Tvs Motor Co Ltd | |
| CN104935228A (en) * | 2015-07-17 | 2015-09-23 | 李红 | Hydropower intelligent control system and control method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628245A (en) * | 2018-06-27 | 2018-10-09 | 北京鉴衡认证中心有限公司 | Wind generating set data acquisition system based on block chain |
| CN110233491A (en) * | 2018-09-27 | 2019-09-13 | 襄阳航力机电技术发展有限公司 | A kind of hydrogen peroxide tail gas top pressure power generation combination method and its control system |
| CN110233491B (en) * | 2018-09-27 | 2022-09-27 | 襄阳航力机电技术发展有限公司 | Hydrogen peroxide tail gas residual pressure power generation grid-connected method and control system thereof |
| CN110661290A (en) * | 2019-09-19 | 2020-01-07 | 泰安阳光动力电机有限公司 | Low-water-head hydropower intelligent control system and method |
| CN110661290B (en) * | 2019-09-19 | 2023-03-03 | 泰安阳光动力电机有限公司 | Low-water-head hydropower intelligent control system and method |
| CN112127841A (en) * | 2020-10-23 | 2020-12-25 | 陕西昆鹏能源科技有限公司 | Intelligent power generation device for pressure difference in oil-gas well |
| CN112127841B (en) * | 2020-10-23 | 2023-03-10 | 陕西昆鹏能源科技有限公司 | Intelligent power generation device for pressure difference in oil-gas well |
| CN112214043A (en) * | 2020-10-26 | 2021-01-12 | 武汉欧立德电气有限公司 | Remote water level control system of hydropower station based on Internet of things |
| CN114583753A (en) * | 2022-03-11 | 2022-06-03 | 贵州一和科技有限公司 | Water and electricity remote automatic control system based on Internet of things |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105182898A (en) | Hydropower PLC intelligent control system | |
| CN106089554B (en) | A kind of control method of hydroelectric generator | |
| CN104935228B (en) | Intelligent control method based on water power intelligence control system | |
| CN207115476U (en) | Coal handling system life period of an equipment O＆M analysis management device | |
| CN105914873B (en) | Double loop power supply automatic transfer equipment and conversion method | |
| CN107658982A (en) | A kind of electrical power distribution integrated management system | |
| CN113359603B (en) | Vacuum jet siphon drainage equipment monitoring system based on PLC | |
| CN202183751U (en) | Microcomputer double-channel three-in-one control panel | |
| CN104242449B (en) | A kind of serve scheduling application remote viewing information management realize method | |
| CN204719920U (en) | DCS system tripping alarm device | |
| CN109756024A (en) | A kind of Switching Power Supply monitoring device and its control method | |
| CN205911818U (en) | Double - circuit power supply automatic switching device | |
| CN110165678B (en) | House power supply voltage automatic regulating system | |
| CN103510124B (en) | A kind of micro grid control system of automatic adjustment electrolytic aluminum DC load and device | |
| CN103500985B (en) | The protective device of thickener slewing bearing and drive motors and method | |
| CN208461470U (en) | A kind of anti-low voltage ride through device of frequency converter | |
| CN106532930A (en) | Intelligent monitoring system of static synchronous compensator | |
| CN104993586A (en) | Monitoring information access automation identification diagnosis system and method | |
| CN205453302U (en) | Electric power monitoring device | |
| CN108695979A (en) | A kind of control of micro-capacitance sensor and detection platform | |
| CN110429619B (en) | Disaster recovery reaction method for demand side frequency emergency control of super-large-scale power grid | |
| CN202615219U (en) | Intelligent building electric power monitoring device | |
| CN206805281U (en) | A kind of coal handling system life period of an equipment O＆M analysis management device | |
| CN202658581U (en) | Sluice emergency control system | |
| CN205827194U (en) | The small hydropower station active and standby changeable control system reform case of integration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151223 |
|
| WD01 | Invention patent application deemed withdrawn after publication |