CN109462217A - A kind of distribution terminal protection definite value adaptive method for switching and device - Google Patents
A kind of distribution terminal protection definite value adaptive method for switching and device Download PDFInfo
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- CN109462217A CN109462217A CN201811599079.9A CN201811599079A CN109462217A CN 109462217 A CN109462217 A CN 109462217A CN 201811599079 A CN201811599079 A CN 201811599079A CN 109462217 A CN109462217 A CN 109462217A
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- 238000000034 method Methods 0.000 title claims abstract description 97
- 238000009826 distribution Methods 0.000 title claims abstract description 73
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 19
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- 238000000429 assembly Methods 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H02J3/383—
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- H02J3/386—
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of distribution terminal protection definite value adaptive method for switching and device, method includes: the running state information of Distributing Terminal Assembly acquisition primary system, and the running state information includes the analog quantity information and switching value information of primary system；Distributing Terminal Assembly is according to collecting to obtain the running state information of primary system and the method for operation of preset method of operation recognition logic automatic identification primary system；Distributing Terminal Assembly automatically selects corresponding preset definite value area definite value according to the method for operation and switches over.This method solves under power distribution network changes of operating modes, and distribution terminal definite value automatically switches problem；And independent of distribution main station system, to reduce definite value switching time.
Description
Technical field
The invention belongs to Distribution Automation Technology fields, and in particular to a kind of adaptive side of switching of distribution terminal protection definite value
Method and device.
Background technique
Relay protection is the first line of defence of power grid security, power grid security is acted on great.It is different in primary system
Under the method for operation, for the maximization for realizing defencive function, need specifically to protect definite value corresponding thereto.In distribution field, match
Net protection and automation are mainly realized by distribution terminal.Distribution terminal can realize default multi-region definite value at present, by scheduling according to
The method of operation determines definite value area and carries out manual switching.
For distribution system, due to frequent operation, failure is more etc. causes obvious with network architecture variation, causes
It is not unique to involve the Distributing Terminal Assembly for needing to carry out definite value switching, definite value switching is carried out by main website one by one, if modification dress
It is too long to set excessive then setting time；In addition distribution Master station access signal is more, and centralized processing response speed is slow, and since distribution is primary
System changes, extends and often need to be safeguarded and be upgraded, and causes definite value handoff functionality low-response or missing.Therefore, pass through distribution tune
Degree system carries out phenomena such as definite value switching easily causes manual switching real-time difference or missing.In view of the above-mentioned problems, it is necessary to match
The adaptive switching that distribution protection definite value is realized on electric terminals, to improve the fault location accuracy of power distribution network, it is ensured that match
The isolation of power grid consequent malfunction, the safety restored and reliable.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, it is fixed to provide a kind of distribution terminal protection
It is worth adaptive method for switching and device.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
The present invention provides a kind of distribution terminals to protect definite value adaptive method for switching, including following step in one aspect
It is rapid:
Distributing Terminal Assembly acquires the running state information of primary system, and the running state information includes primary system
Analog quantity information and switching value information；
Distributing Terminal Assembly is known according to the whole running state information for collecting to obtain primary system and the preset method of operation
The method of operation of other logic automatic identification primary system；
Distributing Terminal Assembly automatically selects corresponding preset definite value area definite value according to the method for operation and switches over again.
In above technical scheme, it is further preferred that determining preset fortune according to the type of the primary system method of operation
The recognition logic of line mode, the type of the method for operation of the primary system include: to run after normal operating mode, fault recovery
Mode and the intermediate method of operation.The running state information of the primary system includes the bus bar side voltage of primary system switch, line
Trackside voltage, electric current and position of the switch information.
Further, the protection definite value of each Distributing Terminal Assembly has in different Distributing Terminal Assemblies under every kind of method of operation
There is identical definite value area code, Distributing Terminal Assembly is automatically associated with system operation mode by definite value trivial number when running.
Further, the method for preset method of operation recognition logic is as follows in Distributing Terminal Assembly:
Every kind of fortune is established according to the switch connection relationship of the various methods of operation of primary system and using voltage and current signals
Recognition logic and corresponding definite value area code are generated configuration file and downloading are stored to distribution terminal and filled by the recognition logic of line mode
It sets.
Preferably, each Distributing Terminal Assembly acquires the running state information of primary system and passes through the change of general object-oriented
Power station event protocol interacts.
In above technical scheme, further comprise the definite value to the different Distributing Terminal Assemblies under the identical method of operation
Area code is checked to determine whether to issue alarm signal.
Preferably, when check method is that power distribution equipment is run, each Distributing Terminal Assembly broadcasts the definite value area code of the present apparatus
Be sent to network, and receive definite value area code information transmitted by other Distributing Terminal Assemblies, by present apparatus definite value area code with it is other
The definite value area code of Distributing Terminal Assembly is checked, if the present apparatus and 2/3 or more distribution under the method for operation identical in system are whole
The definite value area code of end device does not alert then unanimously, otherwise issues alarm signal.
On the other hand, the present invention provides a kind of distribution terminals to protect the adaptive switching device of definite value, comprising:
Status information capture module, method of operation identification module and protection definite value switching module；
The status information capture module, the running state information for Distributing Terminal Assembly acquisition primary system；
The method of operation identification module, for Distributing Terminal Assembly according to the whole operation shape for collecting to obtain primary system
The method of operation of state information and preset method of operation recognition logic automatic identification primary system；
The protection definite value switching module, for Distributing Terminal Assembly again according to the method for operation automatically select correspondence it is preset fixed
Value area definite value switches over and adaptively switches to realization distribution terminal protection definite value.
Further, further includes: definite value area code checks module；The definite value area code checks module, for identical operation
The definite value area code of different Distributing Terminal Assemblies under mode is checked, to determine whether to issue alarm signal.
The invention has the beneficial effects that:
1, it solves under power distribution network changes of operating modes, distribution terminal definite value automatically switches problem, and switching efficiency is high, operation is simple
It is single；
2, the realization of fits automatically switching only relies upon power distribution equipment in region, independent of distribution main station system, thus
Reduce definite value switching time；
3, this system can be with the intellectual FA multiplexed network of distribution, cost of reducing investment outlay.
Detailed description of the invention
Fig. 1 is the operation survey schematic diagram of the embodiment of the present invention；
Fig. 2 is distribution terminal configuration and the secondary network schematic diagram of the embodiment of the present invention；
Fig. 3 is the definite value area anomalous discrimination logic chart of the embodiment of the present invention；
Fig. 4 is the adaptive definite value switching method flow diagram of the embodiment of the present invention.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
The following examples are only intended to illustrate the technical solution of the present invention more clearly, and cannot be used as a limitation the limitation present invention
Protection scope.
Attached drawing 1 is a kind of typical operation survey of distribution: the dual power supply monocycle open loop operation of distributed generation resource access
Wiring.
The distribution terminal (i.e. Distributing Terminal Assembly) of the electrical secondary system of the present embodiment is 1 to be configured with reference to the accompanying drawings, every
Substation's outlet switch configures a line feed terminals, and every switchyard is whole according to interval one or more power distribution station of quantity configuration institute
End, each terminal installation form peer to peer communication network by network equipments such as EPON or interchangers, and the corresponding distribution terminal of attached drawing 1 is matched
It sets and secondary network schematic diagram is as shown in Fig. 2；
The distribution terminal is mounted to the general name of the various remote monitorings at medium voltage distribution network scene, control unit, mainly
Including panel switches monitor terminal, that is, feeder terminal unit (Feeder Ter minal Unit, FTU), distributing transformer monitoring
Terminal (Distribution Transformer supervisory Terminal Unit, TTU)], switchyard and it is public and
The monitor terminal (Distribution Terminal Unit, DTU) of user distribution substation.
Step 1: Distributing Terminal Assembly acquires the running state information of primary system, and the running state information includes one
The analog quantity and switching value information of subsystem.Preferably, each Distributing Terminal Assembly acquires primary system in a particular embodiment
Pass through transformer substation case (the Generic Object Oriented Substation of general object-oriented after running state information
Event, GOOSE) agreement interacts, method of operation recognition logic desired signal real-time status can be obtained.Distribution terminal incite somebody to action this
The system status information that body acquisition, other terminals need is issued at communication network (i.e. the intellectual distribution FA multiplexed network of distribution)
On, and according to identification the method for operation needed for status information, to the present apparatus acquisition except information, by subscribe to communication network on other
Device acquires information, realizes with the intellectual FA multiplexed network of distribution, cost of reducing investment outlay.The intellectual distribution FA network of distribution is adopted
With the ether web frame for supporting peer-to-peer communications, the intelligent distributed FA mode of each power distribution equipment requires to establish logical based on MAC
Communication network, such as Ethernet passive optical network (EPON) or Industrial Ethernet.
Step 2: Distributing Terminal Assembly is according to the whole running state information for collecting to obtain primary system and preset operation
The method of operation of mode recognition logic automatic identification primary system；
Preferably, the method for operation for predefining primary system, according to the distribution primary system network architecture, according to system master
When the independently-powered principle of power supply, failure maximum restore electricity after regulation analysis system normal operation, system exception, abnormal restoring and
The various situation methods of operation such as normal grid switching operation, the method for operation is divided into three categories: being transported after normal operating mode, fault recovery
Line mode and the intermediate method of operation.
Determine that wind-powered electricity generation in system, photovoltaic are accessory power supply according to the distribution primary system network architecture in the present embodiment, it is main
Power supply is substation A, B bus D1, D2 outlet.The knowledge of the preset method of operation is determined according to the type of the primary system method of operation
Other logic, the type of the method for operation of primary system may include three classes: after normal operating mode, fault recovery the method for operation and
The intermediate method of operation.Determine that normal operating mode (fanout operation) has according to the independently-powered principle of system main power source in the present embodiment
There are 4 kinds of methods of operation.It is 8 kinds according to the method for operation after regulation analysis system failure recovery that restores electricity of maximum when failure, it is intermediate
The method of operation (operation of the cyclization back brake) method of operation is 4 kinds.The method of operation and recognition logic are shown in Table 1 in the present embodiment.Table 1 is shown
The protection definite value of each Distributing Terminal Assembly definite value area having the same in different Distributing Terminal Assemblies under every kind of method of operation
Number.
It is automatically associated with system operation mode by definite value trivial number when Distributing Terminal Assembly is run in specific embodiment.
The main method of operation of primary system and recognition logic of 1 embodiment of the present invention of table
In a particular embodiment according to the switch connection relationship of the various methods of operation of primary system and utilize voltage and current
Signal establishes the recognition logic of every kind of method of operation；Determine that every kind of method of operation and specific definite value trivial number one-to-one correspondence are closed
System, and each area's definite value calculated is defaulted in into each Distributing Terminal Assembly, and distribute a definite value area code；By recognition logic and right
It answers definite value area code to generate configuration file and download to store to Distributing Terminal Assembly.
Step 3: Distributing Terminal Assembly automatically selects corresponding preset definite value area definite value according to the method for operation and switches over.
The recognition logic configuration file for the method for operation for being pre-stored in device is read when Distributing Terminal Assembly starts initial and is led to
Configuration file is interrogated, by itself acquisition and communication acquisition system status information when real time execution, is held according to whole system running state
The recognition logic of the row method of operation determines the primary system method of operation and operational objective definite value area, and switches over.In embodiment
In, preferably by visual configuration tool by under different running method recognition logic and its corresponding area code configured, will
Logical transition is configuration file and is downloaded to distribution terminal.
Preferably, it is calculated respectively according to different running method main electrical scheme using power system analysis software in a particular embodiment
Distributing Terminal Assembly protects definite value, and definite value is pre-entered Distributing Terminal Assembly by corresponding definite value area.
The present embodiment is solved compared with prior art under power distribution network changes of operating modes, and distribution terminal definite value automatically switches
Problem, method are simple and safe.
On the basis of above embodiments, preferably in step 1 according further to primary system different running method
Connection relationship is switched, analysis identifies the system state amount information of the key point of acquisition primary system needed for every kind of method of operation.?
Distributing Terminal Assembly is configured at distribution primary system switch, distribution terminal acquires the bus bar side voltage to inductive switch, line side electricity
The status informations such as pressure, electric current and the position of the switch.
In the present embodiment, the running state information of the primary system of power distribution equipment terminal acquisition is shown in Table 2.
The running state information of the terminal installation acquisition of 2 embodiment of the present invention of table
The present embodiment compared with prior art, this embodiment reduces the running state information for the primary system to be acquired,
Reduce overhead and improves efficiency；And solves distribution protection terminal definite value manual switching real-time difference or function lacks
It loses.
It further include to the different distribution terminals under the identical method of operation after step 3 on the basis of above embodiments
The definite value area code of device is checked, to determine whether to issue alarm signal.When preferably power distribution equipment is run, each distribution terminal
The definite value area code broadcast transmission of the present apparatus to network is received the letter of definite value area code transmitted by other Distributing Terminal Assemblies by device
Breath, present apparatus definite value area code and the definite value area code of other Distributing Terminal Assemblies is checked, if the present apparatus is identical as in system
The definite value area code of 2/3 or more Distributing Terminal Assembly under the method for operation does not alert then unanimously, otherwise issues alarm signal.Specifically sentence
Other logic is as shown in Fig. 3.
The present embodiment, which is realized, adaptively to be switched and verifies to realization distribution terminal protection definite value, and definite value switching is improved
Safety and reliability.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The embodiment of the present invention is described in conjunction with attached drawing above, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of distribution terminal protects definite value adaptive method for switching, which comprises the following steps:
The running state information of Distributing Terminal Assembly acquisition primary system；
Distributing Terminal Assembly according to the running state information of collected primary system and preset method of operation recognition logic from
The method of operation of dynamic identification primary system；
Distributing Terminal Assembly automatically selects corresponding preset definite value area definite value according to the method for operation and switches over.
2. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, it is characterised in that: according to
The type of the primary system method of operation determines the recognition logic of the preset method of operation, the class of the method for operation of the primary system
Type includes: the method for operation and the intermediate method of operation after normal operating mode, fault recovery.
3. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, it is characterised in that: described
The running state information of primary system includes bus bar side voltage, line side voltage, electric current and the position of the switch of primary system switch
Information.
4. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, which is characterized in that every kind
The protection definite value of each Distributing Terminal Assembly definite value area code having the same, distribution in different Distributing Terminal Assemblies under the method for operation
Terminal installation is automatically associated with system operation mode by definite value trivial number when running.
5. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, which is characterized in that matching
The method of preset method of operation recognition logic is as follows in electric terminals device:
According to the switch connection relationship of the various methods of operation of primary system and every kind of operation side is established using voltage and current signals
Recognition logic and corresponding definite value area code are generated configuration file and downloading are stored to Distributing Terminal Assembly by the recognition logic of formula.
6. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, it is characterised in that:
The running state information of each Distributing Terminal Assembly acquisition primary system is simultaneously assisted by the transformer substation case of general object-oriented
View interacts.
7. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, it is characterised in that: also wrap
It includes and the definite value area code of the different Distributing Terminal Assemblies under the identical method of operation is checked to determine whether to issue alarm signal.
8. a kind of distribution terminal according to claim 1 protects definite value adaptive method for switching, it is characterised in that:
When power distribution equipment is run, each Distributing Terminal Assembly receives the definite value area code broadcast transmission of the present apparatus to network other
Definite value area code information transmitted by Distributing Terminal Assembly, by the definite value area code of present apparatus definite value area code and other Distributing Terminal Assemblies
Checked, if the present apparatus and the definite value area code of 2/3 or more Distributing Terminal Assembly under the method for operation identical in system unanimously if
It does not alert, otherwise issues alarm signal.
9. a kind of distribution terminal protects the adaptive switching device of definite value characterized by comprising status information capture module, fortune
Line mode identification module and protection definite value switching module；
The status information capture module, the running state information for Distributing Terminal Assembly acquisition primary system；
The method of operation identification module is believed for Distributing Terminal Assembly according to the whole operating status for collecting to obtain primary system
The method of operation of breath and preset method of operation recognition logic automatic identification primary system；
The protection definite value switching module automatically selects corresponding preset definite value area according to the method for operation for Distributing Terminal Assembly again
Definite value switches over and adaptively switches to realization distribution terminal protection definite value.
10. a kind of distribution terminal according to claim 9 protects the adaptive switching device of definite value, which is characterized in that also
It include: that definite value area code checks module；The definite value area code checks module, for the different distribution terminals under the identical method of operation
The definite value area code of device is checked to determine whether to issue alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811599079.9A CN109462217B (en) | 2018-12-26 | 2018-12-26 | Power distribution terminal protection constant value self-adaptive switching method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811599079.9A CN109462217B (en) | 2018-12-26 | 2018-12-26 | Power distribution terminal protection constant value self-adaptive switching method and device |
Publications (2)
| Publication Number | Publication Date |
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| CN109462217A true CN109462217A (en) | 2019-03-12 |
| CN109462217B CN109462217B (en) | 2020-03-20 |
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Cited By (1)
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| WO2023039334A1 (en) | 2021-09-09 | 2023-03-16 | Exxonmobil Chemical Patents Inc. | Systems and methods for measuring polymer additive dispensation |
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| WO2023039334A1 (en) | 2021-09-09 | 2023-03-16 | Exxonmobil Chemical Patents Inc. | Systems and methods for measuring polymer additive dispensation |
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