CN207488377U - Response time measurement device - Google Patents
Response time measurement device Download PDFInfo
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- CN207488377U CN207488377U CN201721148370.5U CN201721148370U CN207488377U CN 207488377 U CN207488377 U CN 207488377U CN 201721148370 U CN201721148370 U CN 201721148370U CN 207488377 U CN207488377 U CN 207488377U
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- response time
- time measurement
- measurement device
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- busbar
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Abstract
The utility model provides a kind of response time measurement device, is related to field of power electronics.The response time measurement device includes：Multiple recording equipment, connect with busbar；Load cabinet is connect with the busbar；The recording equipment of the multichannel is connect with the load cabinet and tested dynamic reactive compensation device, and the dynamic reactive compensation device is connect with the busbar；Wherein, when loading threephase load by the load cabinet, the multiple recording equipment obtains voltage waveform for measuring, current waveform, and transient data and for the voltage waveform, the current waveform, and the transient data is calculated, and obtains the response time of the dynamic reactive compensation device.Relative to the prior art, response time measurement device provided by the utility model manufactures power grid true disturbance by load cabinet, can realize the measure of accurate, complete dynamic reactive compensation device response time.
Description
Technical field
The utility model is related to field of power electronics, in particular to a kind of response time measurement device.
Background technology
With the development of Power Electronic Technique, the electric power such as dynamic passive compensation, active power filtering, voltage restorer, energy storage electricity
The extensive utilization of sub- equipment.And for dynamic reactive generating means, when voltage disturbance occurs for power grid, if its response speed,
Reactive-power control ability cannot be met the requirements, and the safety grid-connection operation of application scenario mini system even power grid can be caused instead great
It threatens.Corresponding national standard and Guo Wang companies all clearly define the response time upper limit of dynamic reactive generating means, so
The length of the response time of this kind of power-type equipment is with one of its key technical index is become, accordingly accurately, completely
Measuring technique becomes the research of dynamic reactive generating means correlated performance, using paying close attention to a little.
All there are certain design defect for the two kinds of mainstream test methods measured currently for the response time.One kind is secondary returning
Road step instruction adjusting method, lacks idle output closed-loop process, as a result inaccurate；Another kind is secondary circuit disturbance simulation,
The undulate quantity of simulation is inputted to test in double measurement circuit, but this is inconsistent with actually once disturbing, testing result is untrue.
Utility model content
The purpose of this utility model is to provide a kind of response time measurement devices, can be effectively improved the above problem.
What the embodiment of the utility model was realized in：
The utility model embodiment provides a kind of response time measurement device, including：
Multiple recording equipment, connect with busbar；
Load cabinet is connect with the busbar；
The recording equipment of the multichannel is connect with the load cabinet and tested dynamic reactive compensation device, described dynamic
State reactive power compensator is connect with the busbar；
Wherein, when loading threephase load by the load cabinet, the multiple recording equipment obtains electricity for measuring
Corrugating, current waveform and transient data and for the voltage waveform, the current waveform and described instantaneous
Data are calculated, and obtain the response time of the dynamic reactive compensation device.
In the utility model preferred embodiment, the multiple recording equipment is specially multichannel oscillograph or more
Oscilloscope channel.
In the utility model preferred embodiment, the multichannel oscillograph includes voltage recording unit, current recording
Unit and the power supply unit being connect with the voltage recording unit and the current recording unit.
In the utility model preferred embodiment, the load cabinet is specially：Capacitance, reactance or low pressure SVG.
In the utility model preferred embodiment, the capacity of the load cabinet is more than the dynamic reactive compensation device
Rated capacity.
In the utility model preferred embodiment, the load cabinet and the dynamic reactive compensation device are with parallel form
It is connected on the busbar.
In the utility model preferred embodiment, the voltage waveform is included in the first voltage wave of the first collection point
Shape, the current waveform is included in the first current waveform of first collection point and affiliated transient data be included in it is described
First transient data of the first collection point and the second transient data in second collection point.
In the utility model preferred embodiment, first collection point is samples at the dynamic reactive compensation device
Point and second collection point are input point.
In the utility model preferred embodiment, the single-phase passage number of the multiple recording equipment is greater than or equal to 2,
And three-phase port number is greater than or equal to 6.
In the utility model preferred embodiment, the response time measurement device further includes breaker, the load
Cabinet is connect by the breaker with the busbar.
The response time measurement device that the utility model embodiment provides, by the way that load cabinet is mended with dynamic reactive is connected with
The busbar for repaying device is attached, and can manufacture true load disturbance to power grid by the load cabinet；By by multiple recording
Equipment is connect respectively with busbar, load cabinet and tested dynamic reactive compensation device, busbar can be added in the load cabinet
When carrying threephase load, multiple recording equipment is made to pass through itself and busbar, load cabinet and tested dynamic reactive compensation device
Each tie point of connection, which measures, obtains voltage waveform, current waveform and transient data, and according to the voltage waveform, described
Current waveform and the transient data are calculated, when finally obtaining the response of the tested dynamic reactive compensation device
Between.Compared to the prior art, response time measurement device provided by the utility model really disturbs power grid manufacture by load cabinet
It is dynamic, the more measurement points of markers are unified, and can coordinate voltage waveform, current waveform and transient data by multiple recording equipment
Virtual value is calculated, the detection of accurate, complete dynamic reactive compensation device can be realized, calculate and the overall process of output, true
The measure of response time, the response time convenient for the power electronic equipment to various reactive-load compensations and active generation control
Research.
Description of the drawings
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structure diagram of response time measurement device that the utility model embodiment provides；
Fig. 2 is the structure diagram of multiple recording equipment that the utility model embodiment provides；
Fig. 3 is the structure diagram of another response time measurement device that the utility model embodiment provides；
Fig. 4 is the knot of another selection of measuring point mode lower response time measurement device that the utility model embodiment provides
Structure schematic diagram.
Icon：10- sampled points；20- input points；30 access points；100- multiple recording equipment；120- voltage recording lists
Member；140- current recording units；160- power supply units；200- load cabinets；300- dynamic reactive compensation devices；400- busbares；
500- breakers；1000- response time measurement devices.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of different.
Therefore, requirement is not intended to limit to the detailed description of the embodiment of the utility model provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " in ", " on ", " under ", "left", "right", " interior ",
The orientation or position relationship of instructions such as " outer " are based on orientation shown in the drawings or position relationship or the utility model product
The orientation or position relationship usually put during use are for only for ease of description the utility model and simplify description, without referring to
Show or imply that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot manage
It solves as the limitation to the utility model.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
It solves to indicate or implying relative importance.
In addition, the terms such as term " level ", " vertical ", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to represent the structure if " level " only refers to that its direction is more horizontal with respect to for " vertical "
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected,
Or it is integrally connected；Can be mechanical connection or electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve concrete meaning of the above-mentioned term in the utility model.
In addition, the terms such as " input ", " output ", " feedback ", " formation " are understood as describing a kind of optics, electricity variation
Or optics, electricity processing.As " formation " only refers to optical signal or electric signal by being had occurred after the element, instrument or device
Variation optically or electrically so that the optical signal or the electric signal are processed, and then are obtained and implemented technical solution
Or solve the required signal of technical problem.
In specific embodiment of the utility model attached drawing, in order to which more preferable, clearer description response time measures dress
The operation principle of each element in putting shows the connection relation of each section in described device, has only significantly distinguished between each element
Relative position relation, can not form to optical path direction, the order of connection and Each part size, the ruler in element or structure
Very little, shape restriction.
Embodiment
Fig. 1 is please referred to, present embodiments provides a kind of response time measurement device 1000, including：Multiple recording is set
Standby 100, it is connect with busbar 400；Load cabinet 200 is connect with the busbar 400；The recording equipment of the multichannel is born with described
It carries cabinet 200 and tested dynamic reactive compensation device 300 connects, the dynamic reactive compensation device 300 and the busbar 400
Connection.
In the present embodiment, when loading threephase load to busbar 400 by the load cabinet 200, power grid can be simulated
True load disturbance, at this point, the multiple recording equipment 100 passes through the multiple recording equipment 100 and busbar 400, negative
Each tie point that cabinet 200 and tested dynamic reactive compensation device 300 connect is carried, can measure and obtain each tie point
Voltage waveform, current waveform and the transient data at place, and in later to the voltage waveform, the current waveform and described
Transient data is calculated, you can obtains the response time of the dynamic reactive compensation device 300.
In the present embodiment, it is desirable that classification is measured for multichannel multi signal for the multiple recording equipment 100 of measurement data,
Preferably, the single-phase passage number of the multiple recording equipment 100 is more than or equal to 2 and three-phase port number is greater than or equal to
6, that is, it requires more than unidirectional 2 channel of the multiple recording equipment 100, more than 6 channel of three-phase, voltage wave can be carried out at the same time
The measurement of shape, current waveform and voltage, the corresponding transient data of electric current.
In the present embodiment, the multiple recording equipment 100 can be specifically multichannel oscillograph, can also select to lead to more
Road oscillograph.As a kind of preferably and convenient for the embodiment of explanation, the present embodiment selection uses model Yokogawa DL850E's
Multichannel oscillograph carries out the explanation of subsequent embodiment part.It is understood that in other specific embodiments, it is described
Multiple recording equipment 100 is it is also an option that the multichannel oscillograph of other models or multichannel oscillograph.
Please refer to Fig. 2, in the present embodiment, the multichannel oscillograph can include voltage recording unit 120, current recording
Unit 140 and the power supply unit 160 being connect with the voltage recording unit 120 and the current recording unit 140.It can manage
Solution, the voltage recording unit 120 are used to measure voltage waveform and instantaneous voltage data of each tie point etc., the electric current
For measuring current waveform and transient current data of each tie point etc., said supply unit 160 is used for institute recording unit 140
The each unit stated in multichannel oscillograph is powered.
In the present embodiment, the load cabinet 200 can be specifically capacitance, reactance or low pressure SVG.Preferably, the load
Cabinet 200 can both send out inductive reactive power, can also send out capacitive reactive power, and controllable load wave time is quick or slow.Particularly, lead to
It crosses control passive load switching way or changes the negative of the given stabilization that can obtain different capacitance grade of active load output
It carries.
In the present embodiment, the capacity of the load cabinet 200 is more than the volume of the dynamic reactive compensation device 300 to be measured
Constant volume.
In the present embodiment, the load cabinet 200 and the dynamic reactive compensation device 300 are connected to same with parallel form
On busbar 400.
In the present embodiment, the selection of multimetering needs most basic the first collection point and the second collection point.It is described mostly logical
The voltage waveform of road oscillograph acquisition is included in the first voltage waveform of the first collection point；The current waveform is included in institute
State the first current waveform of the first collection point；Affiliated transient data be included in first collection point the first transient data and
Second transient data of second collection point.
In the present embodiment, as a preferred embodiment, first collection point is the measured dynamic passive compensation
Sampled point 10 and second collection point are input point 20 at device 300.Particularly, the sampled point 10 is used to measure electricity
Pressure, the input point 20 are used to measure electric current.It is understood that at this point, first transient data is the wink of sampled point 10
When voltage, second transient data be input point 20 transient current.
Please refer to Fig. 3, it is described for convenience of the measurement of 300 response time of dynamic reactive compensation device is carried out in the present embodiment
Response time measurement device 1000 further includes breaker 500, and the load cabinet 200 passes through the breaker 500 and the busbar
400 connections.It is understood that the breaker 500 is used to control the break-make of circuit between load cabinet 200 and busbar 400,
The control of equivalent effect can be carried out by other equipment.
Specifically, since being closed load cabinet 200 to the breaker 500 busbar 400, record and closed from breaker 500
Voltage, electric current transient data and the waveform in this period that dynamic reactive compensation device 300 is fully loaded and output is stable are closed,
Using 10 voltage fluctuation of sampled point as starting point, 90% rated output is reached as terminal, and coordinate discrete using 20 first time of input point
Data are calculated, you can obtain accurate, the complete response time.
Fig. 4 is please referred to, in the present embodiment, it is contemplated that the main transformer capacity corresponding to busbar 400 may be excessive, substantially negative
It carries after cabinet 200 puts into, the fact that 10 voltage fluctuation of sampled point is unconspicuous, equivalent substitution principle can be taken, i.e., sampled point
The voltage measurement of 10 voltage measurement, 200 access point 30 of load cabinet substitutes.At this point, first collection point is from busbar 400
Sampled point 10 replace with 200 access point 30 of load cabinet in Fig. 4.When taking this replacement measurement, it is desirable that load cabinet 200 uses
Passive capacitive, reactance cabinet can set corresponding switching way before powering on；And low pressure SVG loads then need to carry out after the power is turned on
Parameter adjustment, then exported, it can be there are one delay time.It should be noted that it is only to clearly show that the first sampled point in Fig. 4
10 be access point 30, the second sampled point 10 be input point 20, the company without drawing multiple recording equipment 100 and sampled point 10
Line, in actual implementation, the line of multiple recording equipment 100 and sampled point 10 can be it is existing, only in this scenario not
Need the voltage by line acquisition sampled point 10.
In the present embodiment, load cabinet 200 can send out inductive reactive power, can also send out capacitive reactive power, can study, measure it is idle
Influence of the property to the response time of dynamic reactive compensation device 300；In addition, the size for the load disturbance that load cabinet 200 manufactures
It can be adjusted by switching way and given output, the load disturbance of the stabilization of any magnitude can be obtained, so as to suitable
Measurement, research for the response time of the dynamic reactive compensation device 300 of different capabilities.
Response time measurement device 1000 provided in this embodiment, the multi-measuring point based on separate unit multiple recording equipment 100
Unified markers measures, and can acquire simultaneously by the three of the three-phase voltage at control point, dynamic reactive compensation device 300 and loaded line
Phase voltage electric current.By the true disturbance of the load of switching loaded line manufacture, cooperation discrete data calculate virtual value provide it is accurate,
The measure of complete 300 response time of dynamic reactive compensation device, and its preliminary preparation amount is small, it can be single-phase by measuring
10 voltage of sampled point and 20 current conditions of input point can calculate accurate, the complete response time, be improved for properties of product
And a large amount of time is saved in detection.
Fig. 3 or Fig. 4 is please referred to, two kinds of specific response times measurements are introduced below for different 200 types of load cabinet
Scheme.
As the first specific response time measurement scheme provided in this embodiment, load cabinet 200 is passive device group
Into being divided into capacitor box or reactance cabinet, according to demand of the reality to idle property, reactance can be used if necessary to inductive reactive power
Cabinet can use capacitor box if necessary to capacitive reactive power.It can be preferably measured in this way in reactive load feelings of different nature
Response time under condition simultaneously studies load characteristic it is influenced.
For passive load, it is contemplated that in the case of 400 transformer capacity suitable for reading of busbar is larger, cause after load input
Voltage change is smaller and passive load is closed i.e. load input in control switch, it is female as long as having voltage in load
Reactive current will be generated on line 400, can be replaced with the initial time of power on the moment of load cabinet 200 time in response
Load current goes out current moment, convenient for measuring.Such as using Yokogawa DL850E multichannel oscillographs, surveyed using 3 jaw type current probes
The waveform of the three-phase output current of dynamic reactive compensation device 300 at input point 20 is measured, is being connect using 3 differential probe measurements
The three-phase system phase voltage waveform of 200 breaker of load cabinet, 500 times mouths at access point 30.After test equipment connects, start dynamic
State reactive power compensator 300, and the Passive Shape Control of load cabinet 200 is switched and is closed, that is, passive load is put into, at this time load cabinet
200 lead-in circuit breakers 500 are off, and load cabinet 200 does not power on.Oscillograph opens waveform recording function, is closed negative
200 breaker 500 of cabinet is carried, load cabinet 200 obtains electric at this time, exports reactive current, and dynamic reactive compensation device 300 starts tracking and mends
It repays, records the waveform of whole process.Three-phase voltage waveform is powered on load cabinet 200 to occur for initial time, is mended with dynamic reactive
It repays 300 three-phase output current wave of device and reaches fully loaded 90% for the first time as end time, end time subtracts initial time
Obtain the reactive response time of dynamic reactive compensation device 300.
It is active negative for load cabinet 200 as second provided in this embodiment specific response time measurement scheme
It carrying for SVG, it is contemplated that in the case of 400 transformer capacity suitable for reading of busbar is larger, caused voltage change is smaller after load input,
And after SVG sets given output, being exported from powering on to generating and have one section of delay, the SVG of different manufacturers is delayed not necessarily,
Can only occur using SVG output currents, that is, load current as initial time, open machine delay time convenient for removal SVG, ensure result
Accuracy.Such as using Yokogawa DL850E multichannel oscillographs, the dynamic at input point 20 is measured using 3 jaw type current probes
The waveform of the three-phase output current of reactive power compensator 300 measures the load cabinet at access point 30 using 3 jaw type current probes
The SVG three-phase output current waves of 200 mouths of breaker 500 times.After test equipment connects, start dynamic reactive compensation device
300, and 200 breaker 500 of load cabinet is closed, SVG powers on the machine of opening, and SVG loads at this time are defeated without electric current without given output
Go out.Oscillograph opens waveform recording function, gives SVG output capacities, and SVG starts to export reactive current, dynamic passive compensation dress
300 beginning tracing compensations are put, record the waveform of whole process.It is with the three-phase current waveform appearance of load cabinet 200SVG outputs
Begin the moment, it is end time to reach fully loaded 90% for the first time with 300 three-phase output current wave of dynamic reactive compensation device, eventually
Only the moment subtracts initial time and obtains the dynamic reactive response time for mending device.
In conclusion the response time measurement device that the utility model embodiment provides, by load cabinet and will be connected with
The busbar of dynamic reactive compensation device is attached, and can manufacture true load disturbance to power grid by the load cabinet；Passing through will
Multiple recording equipment is connect respectively with busbar, load cabinet and tested dynamic reactive compensation device, can be in the load
When cabinet loads threephase load to busbar, multiple recording equipment is made to pass through itself and busbar, load cabinet and tested dynamic nothing
Each tie point of Reactive power compensation installations connection, which measures, obtains voltage waveform, current waveform and transient data, and according to the electricity
Corrugating, the current waveform and the transient data are calculated, final to obtain the tested dynamic passive compensation
The response time of device.Compared to the prior art, response time measurement device provided by the utility model by load cabinet to electricity
The true disturbance of net manufacture, unifies the more measurement points of markers, and can coordinate voltage waveform, current waveform by multiple recording equipment
And transient data calculates virtual value, can realize accurate, complete dynamic reactive compensation device detection, calculating and output
Overall process, the measure of true response time, convenient for the response of the power electronic equipment to various reactive-load compensations and active generation
Time carries out control research.The above descriptions are merely preferred embodiments of the present invention, and it is new to be not limited to this practicality
Type, for those skilled in the art, the present invention may have various modifications and changes.All essences in the utility model
God and principle within, any modification, equivalent replacement, improvement and so on, should be included in the scope of protection of the utility model it
It is interior.
Claims (10)
1. a kind of response time measurement device, which is characterized in that including：
Multiple recording equipment, connect with busbar；
Load cabinet is connect with the busbar；
The recording equipment of the multichannel is connect with the load cabinet and tested dynamic reactive compensation device, the dynamic nothing
Reactive power compensation installations are connect with the busbar；
Wherein, when loading threephase load by the load cabinet, the multiple recording equipment obtains voltage wave for measuring
Shape, current waveform and transient data and for the voltage waveform, the current waveform and the transient data
It is calculated, obtains the response time of the dynamic reactive compensation device.
2. response time measurement device according to claim 1, which is characterized in that the multiple recording equipment is specially
Multichannel oscillograph or multichannel oscillograph.
3. response time measurement device according to claim 2, which is characterized in that the multichannel oscillograph includes voltage
Recording unit, current recording unit and the power supply unit being connect with the voltage recording unit and the current recording unit.
4. response time measurement device according to claim 3, which is characterized in that the load cabinet is specially：Capacitance, electricity
Anti- or low pressure SVG.
5. response time measurement device according to claim 4, which is characterized in that the capacity of the load cabinet is more than described
The rated capacity of dynamic reactive compensation device.
6. response time measurement device according to claim 5, which is characterized in that the load cabinet and the dynamic reactive
Compensation device is connected to parallel form on the busbar.
7. response time measurement device according to claim 6, which is characterized in that the voltage waveform is included in first and adopts
Collect the first voltage waveform of point, the current waveform is included in the first current waveform of first collection point and affiliated wink
When data the first transient data for being included in first collection point and the second transient data in the second collection point.
8. response time measurement device according to claim 7, which is characterized in that first collection point is the dynamic
Sampled point and second collection point are input point at reactive power compensator.
9. response time measurement device according to claim 1, which is characterized in that the multiple recording equipment it is single-phase
Port number is more than or equal to 2 and three-phase port number is greater than or equal to 6.
10. response time measurement device according to claim 1, which is characterized in that the response time measurement device is also
Including breaker, the load cabinet is connect by the breaker with the busbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721148370.5U CN207488377U (en) | 2017-09-07 | 2017-09-07 | Response time measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721148370.5U CN207488377U (en) | 2017-09-07 | 2017-09-07 | Response time measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207488377U true CN207488377U (en) | 2018-06-12 |
Family
ID=62481840
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721148370.5U Withdrawn - After Issue CN207488377U (en) | 2017-09-07 | 2017-09-07 | Response time measurement device |
Country Status (1)
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| CN (1) | CN207488377U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266012A (en) * | 2019-05-29 | 2019-09-20 | 华电电力科学研究院有限公司 | A kind of photovoltaic plant dynamic reactive response time test method |
| CN111769554A (en) * | 2020-07-07 | 2020-10-13 | 山东省产品质量检验研究院 | System and method for testing dynamic response time of reactive compensation device |
-
2017
- 2017-09-07 CN CN201721148370.5U patent/CN207488377U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266012A (en) * | 2019-05-29 | 2019-09-20 | 华电电力科学研究院有限公司 | A kind of photovoltaic plant dynamic reactive response time test method |
| CN111769554A (en) * | 2020-07-07 | 2020-10-13 | 山东省产品质量检验研究院 | System and method for testing dynamic response time of reactive compensation device |
| CN111769554B (en) * | 2020-07-07 | 2021-09-24 | 山东省产品质量检验研究院 | System and method for testing dynamic response time of reactive compensation device |
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Granted publication date: 20180612 Effective date of abandoning: 20200928 |