CN112152224B - Voltage sag treatment optimization method and system - Google Patents
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Abstract
The invention discloses a voltage sag treatment optimization method and a voltage sag treatment optimization system, and provides a voltage sag treatment optimization method which comprehensively considers the characteristics of voltage compensation range, response time, voltage supportable time, user equipment sag tolerance and user side sag event distribution of treatment equipment
) The voltage sag treatment equipment or the equipment combination treatment effect is represented, and the effectiveness and the reliability of the voltage sag treatment are improved.
Description
Technical Field
The invention belongs to the technical field of voltage sag control, and particularly relates to a voltage sag control optimization method and system.
Background
With the wide application of digitalization and informatization technologies in various fields, more and more sensitive devices are connected into a power system, and the productivity level of various industries is improved, so that the load of the power system presents a new pattern that the traditional load accounts for 80% and the high-tech attribute load accounts for 20%. Among them, high-tech load devices, which are based on CPU, microelectronics, power electronics, digitization, and informatization technologies, are very sensitive to voltage sag (voltage sag). According to the definition of IEEE, the voltage sag is a power quality disturbance event that the effective value of the voltage is reduced to 90% -10% of the normal voltage in a short time, the typical duration is 0.5 cycle to 1 minute, and the power quality disturbance event can be automatically recovered.
The reasons for the voltage sag event are many, and are generally considered to include short-circuit fault in the system, large-scale motor starting, no-load excitation of a large-scale transformer, switching of a large-capacity reactive compensation capacitor bank and the like, but the reasons can be uniformly summarized as suddenly drawing a large current (including an active component and a reactive component, wherein the influence of the reactive component is more prominent) from the system in a short time and automatically recovering. It can be considered that a voltage sag event is an inevitable event in the normal operation of the power system.
The contradiction between the inevitable voltage sag event in the power system and the increasingly sensitive equipment is increasingly prominent, so that the voltage sag problem becomes the most concerned and urgent power quality problem in the industry and academia in the last 20 years. The voltage sag treatment problem is essentially the compatibility problem of the power supply voltage sag level and the voltage sag tolerance of electric equipment, the installation of the voltage sag treatment equipment is the most common voltage sag treatment technology for sensitive users, the essence of the voltage sag treatment equipment is to improve the quality level of electric energy supplied to the electric equipment, the proper type is selected according to the voltage sag tolerance of the equipment, the capacity treatment equipment can theoretically compensate any voltage sag event, and the abnormal operation or even interruption of the production process of the sensitive users is avoided.
The existing voltage sag control technology only considers two factors of a voltage compensation range and response time of control equipment when a voltage sag event occurs, and does not consider other factors (for example, the voltage sag control equipment has the defects of large voltage compensation range but long response time or small voltage compensation range but short response time, sag tolerance of user equipment and the like), and the voltage sag control technology considers information incompletely, so that the accuracy and reliability of given index data are poor, effective and reliable data support cannot be provided for a voltage sag control scheme set by a user, and the effectiveness and reliability of voltage sag control are low.
Disclosure of Invention
The invention provides a voltage sag treatment optimization method, aiming at solving the technical problems that the existing voltage sag treatment technology is incomplete in consideration factors and low in effectiveness and reliability of voltage sag treatment. The invention comprehensively considers a plurality of technical factors of voltage compensation range, response time and voltage supportable time of the voltage sag treatment equipment, and combines the sag tolerance of the user equipment and the sag event distribution characteristics of the user side, thereby providing an accurate and reliable optimization index for assisting the user to formulate a more accurate and reliable voltage sag treatment scheme.
The invention is realized by the following technical scheme:
a voltage sag treatment optimization method comprises the following steps:
step S1, obtaining the tolerance of the sensitive load sag and the switching time of the voltage sag treatment equipment
Response time
Voltage supportable time
And maximum compensation voltage amplitude
；
Step S2, representing each treatment device or device combination treatment performance considering the sensitive load sag tolerance by a voltage tolerance curve on a voltage amplitude-duration plane, wherein the voltage tolerance curve comprises a normal operation area, a newly-increased normal operation area and an abnormal operation area;
step S3, according to the historical monitoring data of voltage sag at the user side, calculating the probability of voltage sag event occurring in the newly added normal operation area range of each sag treatment device or device combination
；
Step S4, comparing each temporary descending treatment equipment or equipment combination
The size of (a) is (b),
the larger the voltage sag treatment effect of the sag treatment equipment or equipment combination is, the better the voltage sag treatment effect is, the larger the voltage sag treatment effect is, the selection is made
And the voltage sag optimization control is realized by the corresponding sag control equipment or equipment combination scheme at the maximum.
Preferably, the transient drop tolerance of the sensitive load in step S1 of the present invention is represented by a voltage tolerance curve on a voltage amplitude-duration plane, wherein the voltage tolerance curve is rectangular and has a rectangular shape
Or
The part of (a) is a normal operation area,
and is
The part of (2) is an abnormal operation area;
wherein the content of the first and second substances,
to ramp down the voltage magnitude of an event,
in order to suspend the duration of the event,
for voltage thresholds where the sensitive load can operate properly,
the time threshold value is the time threshold value for judging whether the sensitive load can normally run or not.
Preferably, when the voltage sag treatment device in step S2 of the present invention is a switching type treatment device, the treatment performance of the switching type treatment device considering the tolerance of the sensitive load sag is specifically:
when in use
When the voltage is over, the switching type treatment equipment cannot avoid more voltage sag events;
when in use
When the voltage is applied to the sensitive load, the sensitive load is not influenced by the voltage sag, and the original abnormal operation area is changed into a newly increased normal operation area;
Preferably, when the voltage sag treatment device in step S2 of the present invention is a compensation type treatment device, the treatment performance of the compensation type treatment device considering the sensitive load sag tolerance is specifically:
when the compensation type treatment equipment adopts an online uninterrupted power supply, the online uninterrupted power supply does not need response time when voltage sag occurs, an energy storage unit of the online uninterrupted power supply can support power supply interruption longer than 60s, all voltage sag events can be avoided, and an original abnormal operation area is changed into a newly-added normal operation area;
when compensation type treatment equipment adopted the DVR, when taking place the voltage sag, the voltage compensation amplitude of DVR received the restriction of self capacity, and newly-increased normal operating area does:
and is
；
Wherein the content of the first and second substances,
the voltage for the DVR may support the time,
providing maximum supplemental voltage magnitude for DVR
The residual voltage threshold value of the normal state can be kept by the afterload, and the requirements are as follows:
。
preferably, when the voltage sag treatment device in step S2 of the present invention adopts a combination of a switching type treatment device and a compensation type treatment device, the combined treatment performance of the device considering the tolerance of the sensitive load sag is specifically:
when in use
During operation, the DVR can rapidly provide voltage support, but is limited by energy storage, the voltage support time is limited, and energy is stored in the DVR energy storage unitBefore using up, if higher level's power is installed and is switched over the type treatment equipment, then switch over the power supply to normal power, the newly-increased normal operating area of sensitive load is this moment:
and is
；
When in use
And meanwhile, the sensitive load is not influenced by the temporary drop, and the original abnormal operation area is changed into a newly increased normal operation area.
Preferably, the probability of the voltage sag event occurring in step S3 of the present invention
Calculated by the following formula:
in the formula (I), the compound is shown in the specification,
，
for the total number of user side voltage sag events,
for the number of voltage sag events falling in the normal operating region,
for the number of voltage sag events falling within the newly added normal operating region,
number of voltage sag events for falling in abnormal operating regionAmount of the compound (A).
On the other hand, the invention also provides a voltage sag treatment optimization system, which comprises a data acquisition module, a graphical processing module, a calculation module and an optimization module;
the data acquisition module is used for acquiring the sensitive load sag tolerance and the switching time of the voltage sag treatment equipment
Response time
Voltage supportable time
And maximum compensation voltage amplitude
；
The graphical processing module adopts a voltage tolerance curve on a voltage amplitude-duration plane to represent each treatment device or device combination treatment performance considering the sensitive load sag tolerance, and the voltage tolerance curve comprises a normal operation area, a newly-increased normal operation area and an abnormal operation area;
the calculation module calculates the probability of voltage sag events in the newly added normal operation area range of each sag treatment device or device combination according to the historical monitoring data of the voltage sag at the user side
；
The optimization module controls the equipment or the equipment combination by comparing the sag
The size of (a) is (b),
the larger the voltage sag treatment effect of the sag treatment equipment or equipment combination is shownThe better the result is, the selection is made
And the voltage sag optimization control is realized by the corresponding sag control equipment or equipment combination scheme at the maximum.
The invention has the following advantages and beneficial effects:
compared with the existing voltage sag control technology, the voltage sag control method only considers single technical indexes such as voltage compensation range, response time or voltage supportable time and the like, and does not consider the sag tolerance of the user equipment and the distribution characteristics of sag events at the user side, so that the voltage sag control method has the defect of poor voltage sag control effect and reliability. The invention provides a voltage sag treatment optimization method and system which comprehensively consider the characteristics of voltage compensation range, response time, voltage supportable time, user equipment sag tolerance and user side sag event distribution of treatment equipment, and adopts a new index (the probability of voltage sag events contained in the newly increased normal operation area range is adopted
) The voltage sag treatment equipment or the equipment combination treatment effect is represented, and the effectiveness and the reliability of the voltage sag treatment are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2 is a schematic diagram of the voltage tolerance curve of the sensing device of the present invention.
FIG. 3 is a schematic diagram of abatement performance of the switched abatement device of the present invention. In FIG. 3, (a) represents
The treatment performance is shown in a schematic diagram; (b) to represent
The treatment performance is shown in the figure.
FIG. 4 is a schematic diagram of abatement performance of the offset abatement apparatus of the present invention. In fig. 4, (a) shows a schematic diagram of abatement performance for line UPS installed; (b) a schematic diagram showing the abatement performance of installing a DVR is shown.
FIG. 5 is a schematic diagram of the combined abatement performance of the switched abatement device and the compensated abatement device of the present invention. In FIG. 5, (a) represents
The treatment performance is shown in a schematic diagram; (b) to represent
The treatment performance is shown in the figure.
Fig. 6 is a schematic block diagram of the system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The embodiment provides a voltage sag treatment optimization method comprehensively considering the characteristics of voltage compensation range, response time, voltage supportable time, user equipment sag tolerance and user side sag event distribution of treatment equipment, and the method adopts the probability of voltage sag event occurrence contained in the newly increased normal operation area range
To represent the treatment effect of each sag treatment device or device combination.
Specifically, as shown in fig. 1, the method of this embodiment includes the following steps:
step S1, obtaining the tolerance of the sensitive load sag and the switching time of the voltage sag treatment equipment
Response time
Voltage supportable time
And maximum compensation voltage amplitude
。
The effect of voltage sag on sensitive devices depends on the power supply system voltage sag characteristics (usually voltage magnitude and duration are considered) and the device voltage withstand capability. The voltage sag sensitivity of a device refers to the sensitivity of the device to voltage sag, i.e., the characteristic of whether the device can operate properly when subjected to voltage sag interference, and is generally described by a voltage tolerance curve on a voltage amplitude-duration plane, which is generally rectangular, as shown in fig. 2.
In the context of figure 2, it is shown,
to sag the voltage amplitude (residual amplitude) of the event,
in order to suspend the duration of the event,
and
the voltage and the time threshold which are respectively used for judging whether the sensitive load can normally operate can be measured actually or obtained according to the existing research and literature.
Or
Is in normal operationThe area is a region in which the number of the regions,
and is
The portion of (a) is an abnormal operation area.
And step S2, representing the treatment performance of each treatment device or device combination considering the sensitive load sag tolerance by a voltage tolerance curve on a voltage amplitude-duration plane, wherein the voltage tolerance curve comprises a normal operation area, a newly-added normal operation area and an abnormal operation area.
Voltage sag control equipment is installed at a user side, the control performance of the control equipment is different due to different operation principles and technical parameters of the control equipment, and the sag tolerance capacity of sensitive equipment is combined (
And
) The voltage sag event that can avoid because of installing different sag treatment equipment can be shown directly to the graphical object, include following several different types sag treatment equipment or equipment combination:
a. switching type apparatus
After the switching type treatment equipment is installed and operated, no matter how deep the sag event is, when the power supply is switched to the power supply with normal power supply, the voltage amplitude can reach the rated level, the voltage sag event with any duration can be coped with, but a certain switching time is needed
The voltage sag event that can be avoided is shown in fig. 2. The area surrounded by the solid line and the coordinate axis is the definition range of voltage sag when
At this time, the switching device cannot avoid more voltage sag events, as shown in FIG. 3(a), at which time the abatement device is installed or notAnd, the same applies; when in use
In the process, the sensitive load is not affected by the voltage sag, and the original abnormal operation area is changed into a newly added normal operation area, as shown in fig. 3(b), the sag event that the sag characteristic quantity (the voltage sag amplitude and the duration) belongs to the newly added normal operation area does not affect the sensitive device. The switching speed of different switching type sag treatment equipment is different according to different technologies or purposes, i.e. the switching speed is different
In contrast to this, the present invention is,
can be obtained according to the technical specification of the corresponding sag treatment equipment or an equipment nameplate provided by a manufacturer.
b. Compensation type equipment
Since the inverter of an online UPS (uninterruptible power system) is always in an operating state, when a voltage sag occurs, the online UPS does not need a response time, and the energy storage unit thereof can also support a power interruption longer than 60 seconds, so that after being installed in the line UPS, all voltage sag events can be avoided, as shown in fig. 4 (a). The DVR (Dynamic Voltage Restorer) has a short required response speed, but is limited by a matching energy storage unit, the rated Voltage compensation time is short, the Voltage compensation amplitude of the DVR is limited by the capacity of the DVR, and a newly added normal operation area after the device is installed is shown in fig. 4 (b).
In the context of figure 4 of the drawings,
、
the response time and voltage supportable time of the DVR respectively,
providing maximum compensation voltage amplitude for DVR
The residual voltage threshold value of the afterload capable of keeping normal state satisfies the following formula relation
c. Switching and compensating equipment cooperation
When in use
When the DVR can quickly provide voltage support, but is limited by stored energy, the voltage support time is limited, before the energy of DVR energy storage unit is used up, if the superior power supply is equipped with switching type treatment equipment, the power supply can be switched into normal power supply, at this moment, the new normal operation zone of sensitive load is added, and as shown in figure 5(a), when the energy of DVR energy storage unit is used up, the power supply can be switched into normal power supply, the power supply can be
At this time, the sensitive load is not affected by the sag, as shown in fig. 5 (b).
Aiming at the same sag sensitive load, the performance of sag treatment equipment can be represented by the size of the area S of the newly added normal operation area, and the performance of the sag treatment equipment is better when the area S is larger.
Step S3, calculating the newly added normal operation area of each sag treatment device or device combination according to the historical monitoring data of the voltage sag at the user sideProbability of voltage sag event occurrence within range
。
If the voltage sag events are uniformly distributed within the voltage sag event definition range shown in fig. 3, 4 and 5, it can be clearly seen that the larger the area S of the newly added normal operation zone is, the better the abatement effect of the abatement device is. However, the voltage sag events suffered by the user side are not uniformly distributed, that is, the number of the voltage sag events falling in the normal operation area, the newly-added normal operation area and the abnormal operation area is not in direct proportion to the area of the area. Factors influencing the voltage sag of the power supply bus are many, including system structure, transformer connection mode, sag reason, fault position, system operation mode and load level, system element fault parameters, climate and geographical environment, equipment aging and maintenance, system protection type and fixed value, and coordination between protection and automatic reclosing devices. Therefore, the characteristic quantities of the voltage sag events suffered by different sensitive users will be different.
Taking fig. 4 as an example for explanation, although the area of the newly added normal operation area obtained by installing the online UPS in fig. 4(a) is larger than that obtained by installing the DVR in fig. 4(b), if the user is not subjected to the voltage sag event falling within the abnormal operation area in fig. 4(b), the voltage sag management effects on the user by installing the online UPS and installing the DVR are consistent. Therefore, the voltage sag control effect of the control device should be to solve the voltage sag events that sensitive users will experience, and it is necessary to take the distribution characteristics of the sag events at the user side into account when evaluating the control effect of the voltage sag control device.
Taking fig. 4(b) as an example, according to the historical monitoring data of the voltage sag of the user, assuming that there are N voltage sag event records in total, the number of voltage sag events falling in the normal operation area, the newly added normal operation area and the abnormal operation area are respectively
、
And
satisfy the following requirements
Then, the probability of the voltage sag event included in the area range of the newly added normal operating area is calculated as:
Step S4, comparing all voltage sag control devices or device combinations
And obtaining the voltage sag treatment optimization scheme.
Example 2
Based on the optimization method of the embodiment 1, the present embodiment provides a voltage sag treatment optimization system, as shown in fig. 6, the system of the present embodiment includes a data acquisition module, a graphical processing module, a calculation module, and an optimization module;
the data acquisition module of the embodiment is used for acquiring the sensitive load sag tolerance and the switching time of the voltage sag treatment equipment
Response time
Voltage supportable time
And maximum compensation voltage amplitude
(i.e., the data acquisition module is used to perform step S1 and graphically represents the tolerance of the sag of the sensitive load)
The graphic processing module of this embodiment uses a voltage tolerance curve on the voltage amplitude-duration plane to characterize each abatement device or device combination abatement performance considering the tolerance of the transient drop of the sensitive load, where the voltage tolerance curve includes a normal operation region, a newly-added normal operation region, and an abnormal operation region (i.e., the graphic processing module is used to execute step S2, and graphically represents each abatement device or device combination abatement performance considering the tolerance of the transient drop of the sensitive load)
The calculation module of this embodiment calculates the probability of voltage sag event occurrence within the newly added normal operating area range of each sag treatment device or device combination according to the historical monitoring data of voltage sag at the user side
(i.e. the calculating module is used for executing the step S3 and calculating the probability of the voltage sag event in the range of the newly added normal operation zone)
The optimization module of the embodiment controls the equipment or the equipment combination by comparing the sag
The size of (a) is (b),
the larger the voltage sag treatment effect of the sag treatment equipment or equipment combination is, the better the voltage sag treatment effect is, the larger the voltage sag treatment effect is, the selection is made
And the voltage sag optimization control is realized by the corresponding sag control equipment or equipment combination scheme at the maximum.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A voltage sag treatment optimization method is characterized by comprising the following steps:
step S1, obtaining the tolerance of the sensitive load sag and the switching time of the voltage sag treatment equipment
Response time
Voltage supportable time
And maximum compensation voltage amplitude
；
Step S2, representing each treatment device or device combination treatment performance considering the sensitive load sag tolerance by a voltage tolerance curve on a voltage amplitude-duration plane, wherein the voltage tolerance curve comprises a normal operation area, a newly-increased normal operation area and an abnormal operation area;
step S3, according to the historical monitoring data of voltage sag at the user side, calculating the probability of voltage sag event occurring in the newly added normal operation area range of each sag treatment device or device combination
；
Step S4, comparing each temporary descending treatment equipment or equipment combination
The size of (a) is (b),
the larger the voltage sag treatment effect of the sag treatment equipment or equipment combination is, the better the voltage sag treatment effect is, the larger the voltage sag treatment effect is, the selection is made
And the voltage sag optimization control is realized by the corresponding sag control equipment or equipment combination scheme at the maximum.
2. The method according to claim 1, wherein the sag tolerance of the sensitive load in step S1 is represented by a voltage tolerance curve on a voltage amplitude-duration plane, the voltage tolerance curve is rectangular, and the voltage tolerance curve is characterized by
Or
The part of (a) is a normal operation area,
and is
The part of (2) is an abnormal operation area;
wherein the content of the first and second substances,
to ramp down the voltage magnitude of an event,
in order to suspend the duration of the event,
for voltage thresholds where the sensitive load can operate properly,
the time threshold value is the time threshold value for judging whether the sensitive load can normally run or not.
3. The method according to claim 2, wherein when the voltage sag governance device in step S2 is a switching governance device, the governing performance of the switching governance device considering the tolerance of the sensitive load sag is specifically:
when in use
When the voltage is over, the switching type treatment equipment cannot avoid more voltage sag events;
when in use
When the voltage is applied to the sensitive load, the sensitive load is not influenced by the voltage sag, and the original abnormal operation area is changed into a newly increased normal operation area;
4. The voltage sag governance optimization method according to claim 2, wherein when the voltage sag governance device in step S2 is a compensation type governance device, the compensation type governance device governance performance considering the tolerance of the sensitive load sag is specifically:
when the compensation type treatment equipment adopts an online uninterrupted power supply, the online uninterrupted power supply does not need response time when voltage sag occurs, an energy storage unit of the online uninterrupted power supply can support power supply interruption longer than 60s, all voltage sag events can be avoided, and an original abnormal operation area is changed into a newly-added normal operation area;
when compensation type treatment equipment adopted the DVR, when taking place the voltage sag, the voltage compensation amplitude of DVR received the restriction of self capacity, and newly-increased normal operating area does:
and is
；
Wherein the content of the first and second substances,
the voltage for the DVR may support the time,
providing maximum supplemental voltage magnitude for DVR
The residual voltage threshold value of the normal state can be kept by the afterload, and the requirements are as follows:
。
5. the voltage sag governance optimization method according to claim 2, wherein when the voltage sag governance device in step 2 is a combination of a switching type governance device and a compensation type governance device, the combined governance performance of the device considering the tolerance of the sensitive load sag is specifically:
when in use
During, the DVR can give voltage rapidly and support, but is limited to the energy storage, and voltage support time is limited, before DVR energy storage unit energy exhausts, if higher level's power supply installs switching type treatment equipment, then switches the power supply to normal power, and the newly-increased normal operating area of sensitive load this moment is:
and is
；
Providing maximum supplemental voltage magnitude for DVR
The residual voltage threshold value of the normal state can be kept by the afterload, and the requirements are as follows:
；
when in use
And meanwhile, the sensitive load is not influenced by the temporary drop, and the original abnormal operation area is changed into a newly increased normal operation area.
6. The method for optimizing voltage sag control according to any one of claims 3 to 5, wherein the probability of voltage sag event occurrence in step S3 is
Calculated by the following formula:
in the formula (I), the compound is shown in the specification,
，
for the total number of user side voltage sag events,
for the number of voltage sag events falling in the normal operating region,
for the number of voltage sag events falling within the newly added normal operating region,
the number of voltage sag events falling in the abnormal operation region.
7. A voltage sag treatment optimization system is characterized by comprising a data acquisition module, a graphical processing module, a calculation module and an optimization module;
the data acquisition module is used for acquiring the sensitive load sag tolerance and the switching time of the voltage sag treatment equipment
Response time
Voltage supportable time
And maximum compensation voltage amplitude
；
The graphical processing module adopts a voltage tolerance curve on a voltage amplitude-duration plane to represent each treatment device or device combination treatment performance considering the sensitive load sag tolerance, and the voltage tolerance curve comprises a normal operation area, a newly-increased normal operation area and an abnormal operation area;
the calculation module calculates the probability of voltage sag events in the newly added normal operation area range of each sag treatment device or device combination according to the historical monitoring data of the voltage sag at the user side
；
The optimization module controls the equipment or the equipment combination by comparing the sag
The size of (a) is (b),
the larger the voltage sag treatment effect of the sag treatment equipment or equipment combination is, the better the voltage sag treatment effect is, the larger the voltage sag treatment effect is, the selection is made
And the voltage sag optimization control is realized by the corresponding sag control equipment or equipment combination scheme at the maximum.
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| CN112907029B (en) * | 2021-01-20 | 2024-05-31 | 国家电网有限公司 | Optimization method of sensitive user voltage sag treatment scheme |
| CN112803423B (en) * | 2021-03-04 | 2024-01-12 | 中国石油大学(华东) | Method and system for optimizing and distributing voltage sag management device of power distribution network in oil field area |
| CN113363975B (en) * | 2021-06-18 | 2022-09-13 | 国网四川省电力公司技能培训中心 | Shared voltage sag compensation system and method considering process immunity time |
| CN113487071B (en) | 2021-06-24 | 2022-03-04 | 四川大学 | SSTS and DVR coordinated action strategy making method and device for voltage sag management |
| CN113746103B (en) * | 2021-08-24 | 2023-09-22 | 国网河南省电力公司电力科学研究院 | Voltage sag treatment benefit quantitative evaluation method based on equivalent volume |
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