CN105201808B - A kind of pump controller, PLC platforms and sea water desalinating unit - Google Patents
A kind of pump controller, PLC platforms and sea water desalinating unit Download PDFInfo
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- CN105201808B CN105201808B CN201510690902.7A CN201510690902A CN105201808B CN 105201808 B CN105201808 B CN 105201808B CN 201510690902 A CN201510690902 A CN 201510690902A CN 105201808 B CN105201808 B CN 105201808B
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- 239000013535 sea water Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000015556 catabolic process Effects 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 3
- 210000001367 artery Anatomy 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 claims description 2
- 206010016256 fatigue Diseases 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000007257 malfunction Effects 0.000 abstract description 5
- 230000008439 repair process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011033 desalting Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- NRTLIYOWLVMQBO-UHFFFAOYSA-N 5-chloro-1,3-dimethyl-N-(1,1,3-trimethyl-1,3-dihydro-2-benzofuran-4-yl)pyrazole-4-carboxamide Chemical compound C=12C(C)OC(C)(C)C2=CC=CC=1NC(=O)C=1C(C)=NN(C)C=1Cl NRTLIYOWLVMQBO-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of pump controller, PLC platforms and sea water desalinating unit, wherein, the pump controller includes：On off control unit, which is used to realizing start and stop instruction locking, and start and stop instruction indicated start stop operation is set to pulse command automatically resets；Condition discrimination unit, which is used to arranging and distinguishing the operation condition in pump control；Breakdown judge unit, whether which breaks down in being used to judge shutdown process；Monitoring unit, which is used to monitor the pump operation state in shutdown process；And operation hours recording unit, which is used for self recording apparatus run time and last time start-stop time.The present invention thoroughly solves the problems, such as malfunction caused by operational order " adhesion ", operation condition is distinguished and has been inquired about, and can effectively judge the failure for occurring, advantageously reduce the generation of maloperation, and record pump operation time, last time start-stop time automatically of the invention, are that equipment control and repair and maintenance provide foundation.
Description
Technical field
The present invention relates to thermal control process field, in particular it relates to a kind of pump controller and the PLC using the pump controller
Platform and sea water desalinating unit.
Background technology
At present, in the control system of low temperature multiple-effect distillation sea water desalting device, the effect of pump is mainly controlled motor, tool
Body includes the content of three aspects, i.e.,：1st, monitoring device running status；2nd, start and stop equipment is needed according to system operation；3rd, when being
Protection equipment when system or equipment occur abnormal.Therefore, to the control of pump it is the normal core skill run of guarantee sea water desalinating unit
Art.
In the control system of low temperature multiple-effect distillation sea water desalting device, PLC platforms are important hardware configurations, the PLC
Pid control function block, pump control function block etc. are can configure on platform, to realize the Automated condtrol to relevant device.Such as Fig. 1 institutes
Show, pump control function block is that control thought is passed through functional device during " data acquisition, data processing, logical operationss "
What form was expressed, which is the core of control system monitoring operation.
As shown in Figure 2 and Figure 3, sets forth the start and stop operation logic figure and failure of existing conventional pumps control function block
Handling principle figure.Understand that the conventional pumps control function block has the defect of the following aspects with reference to Fig. 2 and Fig. 3：
1st, startup/stop loop is directly triggered using unicoil, caused by being easily caused host computer operational order " adhesion "
Equipment malfunction problem.
The appearance of host computer operational order " adhesion " problem, as shown in figure 4, enabled instruction 002071 is 2 pps pulse per second signals.
After host computer clicks on start button, enabled instruction button 003112 is set to " 1 ", T2.0 function BOB(beginning of block) timing, after timing 2 seconds
Output high level, resetting coil 002071 is set to " 1 ", and which closes contact disconnection so that T2.0 functional devices and enabled instruction coil
003113 is reset to 0 simultaneously, realizes 2 pulse per second (PPS) command signals.But when there is situations below, easily cause upper button viscous：
1) operator's operation goes wrong, and issues another instruction, make if issuing and having not been completed when an instruction
One instruction breaks causes viscous；
2) host computer is WINDONWS operating systems, " deadlock " phenomenon occurs in operation and causes viscous generation.
If the viscous straight hair " 1 " of upper button, after reset, 003112 will be set to " 1 " again, so circulate, and destroy logic
It is normal to run.
2nd, interlock condition and protective condition do not carry out condition differentiation and priority rating, it is impossible to adapt to pump in actual motion
Various running statuses.
Interlock condition is that system failure problem occur in system operation to interlock for protection system；Protective condition is system
Or equipment occurs the protective condition that abnormal conditions cannot be run down and do in itself.In pump control process, distich bolt is needed
Part and protective condition make a distinction and priority is divided.Generally, protective condition needs higher than interlock condition priority, and some are special
In the case of different, when needing monomer trial operation after such as pump maintenance, it is necessary to release interlock condition and reservation protection condition.
3rd, lack failure condition to judge.
In startup/stopped process, it is possible to startup/halt instruction occurs and sends, and feedback of status is not returned shows
As (holding wire loosen, channel failure etc.), cause to open/stop equipment.And existing pump control function block cannot be effective at once
Ground judges what failure occur, so as to affect the safety of the operation of system other equipment and equipment.
4th, lack the monitoring of the process status signal to starting/stopping, it is impossible to effectively monitoring pump state.
5th, as pump has operation and time between overhauls(TBO), run to certain hour and have to safeguard and overhaul, and existing pump control
Functional device cannot be realized recording automatically run time and record automatically the function of pump last time start-stop time.
Therefore, the defect having for pump control function block on the PLC platforms of existing sea water desalinating unit, development function is more
It is very important for comprehensive pump controller.
The content of the invention
It is an object of the invention to provide a kind of pump controller, the pump controller is used to solve to be applied to PLC platforms at present
The problem of pump controller single function.
To achieve these goals, the present invention provides a kind of pump controller, and the pump controller includes：On off control unit,
Which is used to realizing start and stop instruction locking, and start and stop instruction indicated start stop operation is set to pulse command automatically resets；Bar
Part discrimination unit, which is used to arranging and distinguishing the operation condition in pump control；Breakdown judge unit, which is used to judge shutdown process
In whether break down；Monitoring unit, which is used to monitor the pump operation state in shutdown process；And operation hours record
Unit, which is used for self recording apparatus run time and last time start-stop time.
Present invention also offers a kind of PLC platforms, which includes above-mentioned pump controller.
Present invention also offers a kind of sea water desalinating unit, which includes above-mentioned PLC platforms.
By above-mentioned technical proposal, the solution have the advantages that：
1st, in the present invention, by configuring rest-set flip-flop, thoroughly solve the problems, such as malfunction caused by operational order " adhesion ".
2nd, the present invention is distinguished to operation condition and has been inquired about, and advantageously reduces the generation of maloperation.
3rd, the present invention can effectively judge the failure for occurring, and advantageously ensure that the normal operation of system other equipment and set
Standby safety.
4th, the present invention can monitor pump state in real time.
5th, the present invention can record pump operation time, last time start-stop time automatically, be that equipment control and repair and maintenance are carried
For foundation.
6th, the present invention can carry out the free switching of interlocking pattern and noninterlocked pattern.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the workflow principle schematic of the pump control function block in sea water desalinating unit.
Fig. 2 is the principle schematic that the pump control function block of prior art carries out pump control.
Fig. 3 is the principle schematic that the pump control function block of prior art carries out Fault Control.
Fig. 4 is the exemplary plot that the pump control function block of prior art produces operational order " adhesion ".
Fig. 5 is the structural representation of the pump controller in embodiments of the present invention.
Fig. 6 is the principle schematic that pump controller carries out to pump control in embodiments of the present invention.
Fig. 7 is the principle schematic of the operation hours recording unit of pump controller in embodiments of the present invention.
Fig. 8 is the schematic diagram of the interface of the pump controller in embodiments of the present invention.
Description of reference numerals
1st, on off control unit, 2, condition discrimination unit, 3, breakdown judge unit, 4, monitoring unit, 5, equipment is when running
Between recording unit, 6, mode selecting unit.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
At present, in the control system of low temperature multiple-effect distillation sea water desalting device, PLC platform configurations have pump control function
Block.With reference to background section, existing conventional pumps control function block single function is really applied to answering for desalinization
Use scene.Therefore, present embodiment gives a kind of newly-designed pump controller, and which can be integrated in as control function block
It is on PLC platforms, low to solve the problems, such as the pump control function block single function on existing PLC platforms, adaptability.
As shown in figure 5, the pump controller that present embodiment is provided includes：On off control unit 1, which is used to realize that start and stop refer to
Locking is made, and start and stop instruction indicated start stop operation is set to into pulse command and automatically reset；Condition discrimination unit 2, its use
In arranging and distinguish the operation condition in pump control；Breakdown judge unit 3, whether which there is event in being used to judge shutdown process
Barrier；Monitoring unit 4, which is used to monitor the pump operation state in shutdown process；And operation hours recording unit 5, its use
In self recording apparatus run time and last time start-stop time.
Additionally, above-mentioned pump controller also includes：Mode selecting unit 6, which is used for switchable pump in noninterlocked pattern (debugging mould
Formula) and interlocking pattern under run.The selection of pattern is main to consider that pump, in maintenance and the both of which run, overhauls and repair rear test run
It is noninterlocked pattern between the departure date, it is contemplated that the safety in equipment trial operation, noninterlocked pattern is only with protective condition；Operation
Period is then interlocking pattern, simultaneous with interlocking, protection, automatic condition.
It should be noted that, above-mentioned pump controller can be a novel product for being completely independent design, or according to
The innovative product that pump control function block on existing PLC platforms is improved.When being improved to pump control function block, can
It is improved by the plug-in of change its inside function module, and is correspondingly arranged the interface parameters and configuration correlation of correlation
Function sub-modules.And be completely independent setting as one novel product when, in addition to above-mentioned functions unit, often also there is provision of
The basic function module that rule pump control function block has, such as operation-mode selector, starting module, stopping modular, failure report
Alert module, power module etc., these basic function modules are used in combination with above-mentioned each functional unit, and which is designed as existing maturation
Technology no longer in present embodiment to state more.
In addition, also, it should be noted that there is signal interactive relation between above-mentioned each functional unit, but not easily pass through
Structural representation is illustrated, therefore the annexation not shown in Fig. 5 between each functional unit.For the connection between each functional unit is closed
System refers to the principle schematic of the pump controller shown in Fig. 6.
Below the functional unit that pump controller has is specifically described.
First, on off control unit
The on off control unit is substantially an on off control loop, and which includes rest-set flip-flop, is touched by the RS
Sending out device is used to realize start and stop instruction locking.Meanwhile, start and stop are instructed corresponding start stop operation to be set to arteries and veins by the on off control unit
Rush instruction to automatically reset, the example of correspondence Fig. 4, command coil 003113 adopt rest-set flip-flop, realize 2 pulse per second (PPS) command signals
Afterwards, upper button automatically resets, due to rest-set flip-flop automatic blocking function will not a straight hair " 1 ", so as to command coil
003112 will not be set to " 1 ", and logic is normal.Therefore, by the on off control unit of present embodiment, thoroughly solve operation and refer to
Make malfunction problem caused by " adhesion ".
2nd, condition discrimination unit
In pump control, operation condition generally comprises interlock condition, protective condition, permissive condition and automatic start-stop condition.Interlocking
Condition be occur in system operation system failure problem for protection system interlocked startup other equipment, make system in failure
In the case of can also run or safety stop transport；Protective condition is that system or equipment occur abnormal conditions in itself and cannot run down
And the protective condition for doing, mainly protection equipment reduce equipment loss；It is the bar for needing to meet before equipment starts during permissive condition
Part, and protection equipment；Automatic start-stop condition is the condition arranged for system automation control.Action in the present embodiment
The division of the priority of condition is built upon " insurance system ", on the basis of the thinking of " guarantor's equipment ", reduces human intervention, improves automatic
Change control level, the risk that the system failure and unit exception are brought is reduced to greatest extent by reasonably pre-seting, protected
The normal operation of card system and equipment.Cannot carry out what condition differentiation and condition priority were divided for existing pump control function block
Defect, the condition discrimination unit of present embodiment are used to arranging and distinguishing the interlock condition in pump control, protective condition, allow bar
Part and automatic start-stop condition, to realize based on the automatically controlling of each operation condition, programme-control and protection control etc..
Additionally, also including condition query unit in the condition discrimination unit, which is used for the inquiry for providing operation condition, with
Realize checking control logic by query actions condition.The condition query unit provides query function to system, by inquiry
Operation condition can check whether control logic meets system operation requirement, so as to reduce the generation of maloperation.
3rd, breakdown judge unit
In present embodiment, whether the breakdown judge unit is specifically included with breaking down in disconnected shutdown process：Pass through
Whether break down in the condition adjudgement shutdown process of command signal and operation feedback signal in setting time, if breaking down,
Failure judgement signal type.
It should be noted that, fault signal type is broadly divided into two classes, i.e. hard fault (MCC is unavailable) and soft fault (start and stop
Failure).
4th, monitoring unit
In present embodiment, the monitoring unit is connected with host computer, for the start and stop arrived by host computer display monitoring
During pump operation state so that running status of the pump during each is clearer, be easy to grasp pump operation situation.
In addition, on off control unit 1, condition discrimination unit 2, breakdown judge unit 3, operation hours recording unit 5
Host computer can also be connected with mode selecting unit 6, corresponding function be realized with by operating host computer.
5th, operation hours recording unit
As the pump of sea water desalinating unit is all separate unit operation, it is not provided with standby, therefore the cycle of operation for pump carries out
The automatic record of operation hours, and the last time of pump is started, dwell time carries out record and is very important.
In addition to above-mentioned record is carried out, the operation hours recording unit always according to operation hours and last
The secondary start-stop time, the operation accumulated time of equipment is obtained, and records the operation accumulated time.It should be noted that, the operation to pump
Accumulated time carries out being recorded as equipment control and the repair and maintenance cycle provides foundation.
6th, mode selecting unit
By mode selecting unit, can be transported under noninterlocked pattern (also referred to as debugging mode) and interlocking pattern with switchable pump
OK.Pump needs monomer trial operation after limber up period or maintenance, needs to release interlock condition under this state, but in order to protect
Equipment needs reservation protection condition, therefore system normally runs selection interlocking pattern, and pump maintenance trial operation selects noninterlocked mould
Formula, preferably normal mode.
Based on above-mentioned each functional unit, as shown in fig. 6, the control principle of the pump controller of present embodiment is：By behaviour
Make mode selector selection operation mode after manually or automatically, to carry out the control of the startup under manually or automatically mode and stopping control
System, is related to realizing instruction locking, carrying out operation condition (figure by rest-set flip-flop proposed in present embodiment in control process
In entry condition, stop condition etc.) selection, breakdown judge, equipment start-stop Stateful Inspection etc..Certainly, control process is also related to
And pump operation time record, as shown in fig. 7, recording to related instruction and time.It should be noted that, Fig. 6 and Fig. 7 should be regarded
It is integrated, illustrates jointly the principle of pump controller.
In addition, above-mentioned pump controller is required to PLC platforms, therefore can be according to the shape of the pump control function on PLC platforms
Formula, configures multiple interfaces, and each interface is corresponding with the functional unit that the pump controller includes, using relative as this
The input interface or output interface of the functional unit answered.As shown in figure 8, give the interface and interface parameters of pump controller
One preferred arrangement, the character representation in figure in square frame are the title of each interface definition, and the Chinese character outside corresponding square frame
The annotation carried out by the title for defining.
In sum, the pump control function that the pump controller in present embodiment is used at present relative to sea water desalinating unit
Block, has the advantages that the following aspects：
1st, thoroughly solve the problems, such as malfunction caused by operational order " adhesion ".
2nd, operation condition is made a distinction and is inquired about, reduce the generation of maloperation.
3rd, the failure for occurring be can effectively judge, normal operation and the peace of equipment of system other equipment advantageously ensured that
Entirely.
4th, pump state can be monitored in real time.
5th, pump operation time, last time start-stop time can be recorded automatically, is that equipment control and repair and maintenance provide foundation.
6th, the free switching of interlocking pattern and noninterlocked pattern can be carried out.
Also there is corresponding advantage using the above-mentioned PLC platforms and sea water desalinating unit for changing pump controller.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The compound mode of energy is no longer separately illustrated.
Additionally, combination in any between a variety of embodiments of the present invention, can also be carried out, as long as which is without prejudice to this
The thought of invention, which should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of pump controller, it is characterised in that the pump controller includes：
On off control unit, which is used to realize start and stop instruction locking, and start and stop instruction indicated start stop operation is set to arteries and veins
Rush instruction to automatically reset；
Condition discrimination unit, which is used to arranging and distinguishing the operation condition in pump control；
Breakdown judge unit, whether which breaks down in being used to judge shutdown process；
Monitoring unit, which is used to monitor the pump operation state in shutdown process；And
Operation hours recording unit, which is used for self recording apparatus run time and last time start-stop time.
2. pump controller according to claim 1, it is characterised in that the pump controller also includes：
Mode selecting unit, which is used for switchable pump and runs under noninterlocked pattern and interlocking pattern.
3. pump controller according to claim 1 and 2, it is characterised in that the on off control unit includes RS triggerings
Device, the rest-set flip-flop are used to realize start and stop instruction locking.
4. pump controller according to claim 1 and 2, it is characterised in that operation condition includes interlocking in the pump control
Condition, protective condition, permissive condition and automatic start-stop condition.
5. pump controller according to claim 1 and 2, it is characterised in that also include in the condition discrimination unit：
Condition query unit, for providing the inquiry of operation condition, to realize checking control logic by query actions condition.
6. pump controller according to claim 1 and 2, it is characterised in that the breakdown judge unit, which is used for judgement and opens
Whether break down during stopping, specifically include：
Whether break down in condition adjudgement shutdown process by command signal in setting time and operation feedback signal, if going out
Existing failure, failure judgement signal type.
7. pump controller according to claim 1 and 2, it is characterised in that the monitoring unit is connected with host computer, is used for
By host computer display monitoring to shutdown process in pump operation state.
8. pump controller according to claim 1 and 2, it is characterised in that the operation hours recording unit is also used
In：
According to operation hours and last time start-stop time, the operation accumulated time of equipment is obtained, and records the operation and tired out
The product time.
9. a kind of PLC platforms, it is characterised in that including the pump controller any one of claim 1 to 8.
10. a kind of sea water desalinating unit, it is characterised in that including the PLC platforms described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510690902.7A CN105201808B (en) | 2015-10-22 | 2015-10-22 | A kind of pump controller, PLC platforms and sea water desalinating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510690902.7A CN105201808B (en) | 2015-10-22 | 2015-10-22 | A kind of pump controller, PLC platforms and sea water desalinating unit |
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| CN105201808A CN105201808A (en) | 2015-12-30 |
| CN105201808B true CN105201808B (en) | 2017-03-29 |
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| CN107469624B (en) * | 2017-09-11 | 2020-04-07 | 广东海洋大学深圳研究院 | Offshore fresh water production and supply system and device directly driven by ocean renewable energy |
| CN110330077B (en) * | 2019-07-10 | 2022-04-05 | 神华（福建）能源有限责任公司 | Chemical ultrafiltration water production system equipment and control method thereof |
| CN112904267A (en) * | 2021-01-19 | 2021-06-04 | 南京钢铁股份有限公司 | Automatic switching method for standby pump in electrical soft fault |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5694087A (en) * | 1996-01-29 | 1997-12-02 | International Business Machines Corporation | Anti-latching mechanism for phase lock loops |
| CN202040065U (en) * | 2011-05-10 | 2011-11-16 | 中国航天科技集团公司烽火机械厂 | Control host machine for emulsion pump station |
| CN202117902U (en) * | 2011-06-03 | 2012-01-18 | 赵国祥 | Electric automation monitoring and control system of pump station |
| CN102966586B (en) * | 2012-11-30 | 2015-12-23 | 中广核工程有限公司 | A kind of controlling method of nuclear power station ventilation system |
| CN103062030B (en) * | 2013-01-17 | 2016-01-20 | 中国南方电网有限责任公司超高压输电公司 | A kind of high voltage direct current valve cooling system main pump COMM communication, method and main pump system |
| CN203756348U (en) * | 2014-04-01 | 2014-08-06 | 重庆长安伟世通发动机控制系统有限公司 | Oil pump flow controller |
| CN204419538U (en) * | 2014-12-29 | 2015-06-24 | 中国神华能源股份有限公司 | Working surface pumping plant lock-in control system |
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Address after: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: National Energy Group Guohua Power Co.,Ltd. Patentee after: Guoneng Hebei Cangdong Power Generation Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: BEIJING GUOHUA POWER Co.,Ltd. Patentee before: HEBEI GUOHUA CANGDONG POWER GENERATION Co.,Ltd. |
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