CN112802687A - High-altitude power capacitor device - Google Patents
High-altitude power capacitor device Download PDFInfo
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- CN112802687A CN112802687A CN202011613362.XA CN202011613362A CN112802687A CN 112802687 A CN112802687 A CN 112802687A CN 202011613362 A CN202011613362 A CN 202011613362A CN 112802687 A CN112802687 A CN 112802687A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 140
- 239000012212 insulator Substances 0.000 claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 17
- 239000004576 sand Substances 0.000 claims description 6
- 230000004224 protection Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 8
- 230000005855 radiation Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/14—Supporting insulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
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Abstract
The utility model relates to a high-altitude power capacitor device, which comprises a reactor, a switch, a lightning arrester, a capacitor, an anti-bird cap, a discharge coil and a current transformer, wherein the high-altitude power capacitor device adopts a single star-shaped wiring mode, the reactor is horizontally arranged and is prepositively installed on the high-altitude power capacitor device, the switches are respectively arranged at two ends of the capacitor, and the discharge coil is symmetrically arranged at two ends of the capacitor; the creepage distance corresponding to the post insulator of at least one of the reactor, the switch, the lightning arrester and the capacitor is the product of the set creepage distance and the correction coefficient; wherein the correction factor is related to the altitude of the installation place of the power capacitor device, and the correction factor is more than 1. Through the technical scheme, the insulation level of the high-altitude power capacitor device is improved, and the adaptability of the capacitor bank device in a high-altitude area is further improved.
Description
Technical Field
The present disclosure relates to capacitor technology, and more particularly, to a high altitude power capacitor device.
Background
As altitude increases, the pressure of the atmosphere decreases and the air density and humidity decrease accordingly. In addition, high altitude areas are characterized by low air pressure or air tightness, low air temperature, large temperature change, low absolute air humidity, high solar radiation illumination, low precipitation, strong wind and heavy weather, low soil temperature and long freezing period.
The characteristics of the high-altitude area directly affect the performance of the electrical product, and the insulation level of the electrical product is reduced, for example, the electrical capacitor device arranged in the high-altitude area, and the reduction of the insulation level brings potential safety hazards to the use of the electrical capacitor device.
Disclosure of Invention
In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a high-altitude power capacitor device, which improves an insulation level of the high-altitude power capacitor device, and further improves an adaptability of the power capacitor device in a high-altitude area.
The present disclosure provides a high altitude power capacitor device, including:
the high-altitude power capacitor device adopts a single star-shaped wiring mode, the reactor is horizontally placed and is arranged in front of the high-altitude power capacitor device, the switches are respectively arranged at two ends of the capacitor, and the discharge coils are symmetrically arranged at two ends of the capacitor;
the creepage distance corresponding to the post insulator of at least one of the reactor, the switch, the arrester and the capacitor is the product of the set creepage distance and the correction coefficient; wherein the correction factor is related to an altitude of a place where the power capacitive device is installed, and the correction factor is greater than 1.
Optionally, the electrical clearance of the capacitor is a product of a set electrical clearance and the correction factor.
Optionally, the capacitor has an electrical gap of 250 mm or more.
Optionally, an electrical gap of at least one of the switch, the arrester, the discharge coil, and the current transformer is a product of a corresponding set electrical gap and the correction factor.
Optionally, the correction coefficient satisfies the following calculation formula:
wherein Ka is the correction coefficient, m is a correction index, and H is an altitude of an installation site of the power capacitive device.
Optionally, the correction coefficient is greater than or equal to 1.1 and less than or equal to 1.8.
Optionally, the insulating and protecting material adopted by the bird-proof cap comprises a rubber material.
Optionally, a sand leakage hole is arranged on the bird-proof cap.
Optionally, a post insulator of at least one of the reactor, the switch, the surge arrester, and the capacitor is coated with a glaze material.
Optionally, the thickness of the glaze layer material is greater than or equal to 40 microns.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the disclosed embodiment provides a high-altitude power capacitor device, which comprises a reactor, a switch, a lightning arrester, a capacitor, a bird prevention cap, a discharge coil and a current transformer, wherein the high-altitude power capacitor device adopts a single star connection mode, the reactor is horizontally arranged and is arranged in front of the high-altitude power capacitor device, the switch is respectively arranged at two ends of the capacitor, the discharge coil is symmetrically arranged at two ends of the capacitor, the creepage distance corresponding to a post insulator of at least one of the reactor, the switch, the lightning arrester and the capacitor is set to be the product of the set creepage distance and a correction coefficient, the correction coefficient is related to the altitude of an installation place of the power capacitor device, the correction coefficient is more than 1, the insulation level of the high-altitude power capacitor device is improved by increasing the creepage distance corresponding to the post insulator, and furthermore, the adaptability of the capacitor bank device in a high-altitude area is improved, and the safety and reliability of the capacitor device in the high-altitude area are ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-altitude power capacitor device according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Fig. 1 is a schematic structural diagram of a high-altitude power capacitor device according to an embodiment of the present disclosure. As shown in fig. 1, the high-altitude power capacitor device includes a reactor 1, a switch 2, a lightning arrester 3, a capacitor 4, a bird-proof cap (not shown in fig. 1), a discharge coil 6 and a current transformer 7, the high-altitude power capacitor device adopts a single star connection mode, the reactor 1 is flatly placed and prepositioned and installed on the high-altitude power capacitor device, the switches 2 are respectively arranged at two ends of the capacitor 4, and the discharge coil 6 is symmetrically arranged at two ends of the capacitor 4.
Specifically, the high-altitude power capacitor device adopts a single star-shaped connection as shown in fig. 1, the reactor 1 is horizontally arranged and installed in a front-mounted mode, namely the reactor 1 is arranged at the front end of the high-altitude power capacitor device shown in fig. 1, and the arrangement of the reactor 1 can reduce the switching-on inrush current of the high-altitude power capacitor device to the maximum extent. The switches 2 are respectively arranged at two ends of the capacitors 4, for example, fig. 1 exemplarily shows four capacitors 4, one switch 2 is arranged on the left side of all the capacitors 4, one switch 2 is arranged on the right side of all the capacitors 4, the switches 2 can be, for example, isolated grounding switches, and the safety and reliability of grounding after the capacitor bank containing a plurality of capacitors 4 exits from the power capacitor device are ensured by the arrangement of the switches 2. The discharge coils 6 are symmetrically arranged at two ends of the capacitor 4, for example, in fig. 1, a discharge coil 6 is arranged on the left side of a capacitor bank formed by two capacitors 4 arranged on the left side, and a discharge coil 6 is arranged on the right side of a capacitor bank formed by two capacitors 4 arranged on the right side, so that the discharge of the capacitor 4 is realized and the residual charges of the capacitor 4 can be completely discharged. The current transformer 7 is arranged between the two capacitor banks and used for realizing relay protection of the capacitor 4 and avoiding the damage of the single capacitor 4 from influencing the whole high-altitude power capacitor device. The bird cap is provided on the terminal of the capacitor 4 exposed to the outside, and the lightning arrester 3 may be provided, for example, between the left-hand switch 2 and the left-hand discharge coil 6 in fig. 1.
Setting the creepage distance corresponding to the post insulator of at least one of the reactor 1, the switch 2, the lightning arrester 3 and the capacitor 4 as the product of the set creepage distance and the correction coefficient; wherein the correction coefficient is related to the altitude of the installation place of the power capacitor device, and the correction coefficient is more than 1.
Specifically, the post insulator is used for supporting a corresponding device from the ground, the post insulator is installed at the bottom of the whole high-altitude power capacitor device, the ground insulation level of the whole high-altitude power capacitor device is determined, the creepage distance corresponding to the post insulator of at least one of the reactor 1, the switch 2, the arrester 3 and the capacitor 4 can be set to be the product of the set creepage distance and the correction coefficient, preferably, the creepage distances corresponding to the post insulator 81 of the reactor 1, the post insulator 82 of the switch 2, the post insulator 83 of the arrester 3 and the post insulator 84 of the capacitor 4 can be set to be the product of the set creepage distance and the correction coefficient, that is, the post insulator 81 of the reactor 1, the post insulator 82 of the switch 2, the post insulator 83 of the arrester 3 and the post insulator 84 of the capacitor 4, the correction parameters are amplified by a certain multiple relative to the creepage distance selection value of the plain area, namely, the post insulators of the reactor 1, the switch 2, the lightning arrester 3 and the capacitor 4 are all selected from post insulators with large creepage distances, and the correction coefficients are related to the altitude of the installation place of the power capacitor device, so that the ground insulation level of the high-altitude power capacitor device is improved, the adaptability of the capacitor bank device in the high-altitude area is further improved, and the safety and reliability of the capacitor device in the high-altitude area are ensured.
Alternatively, the correction coefficient satisfies the following calculation formula:
wherein, KaFor the correction factor, m is a correction index, m is 1 for line frequency, lightning impulse and interphase operation impulse voltage, m is 0.9 for longitudinal insulation operation impulse voltage, m is 0.75 for phase-to-ground operation impulse voltage, and H is the altitude of the installation site of the power capacitor device. Specifically, the creepage distance of the post insulators of the reactor 1, the switch 2, the arrester 3 and the capacitor 4 can be set by multiplying the selection standard of the creepage distance of the corresponding plain area by the correction coefficient, the correction coefficient is related to the altitude of the installation place of the power capacitor device, and the creepage distance corresponding to the post insulator of at least one of the reactor 1, the switch 2, the arrester 3 and the capacitor 4 is set as the product of the set creepage distance and the correction coefficient, so that the altitude range of 5000 meters can be compensated to the maximum extent, the altitude is increased by 1000 meters, the average air pressure is reduced by 7.7LPA to 10.5kPa every time, and the external insulation strength is reduced by 8 percent to 13 percent, thereby bringing about high altitude power capacitorThe problem of the reduction of the insulation level of the capacitor device is beneficial to eliminating the adverse effect of high altitude on the high altitude power capacitor device. Illustratively, the correction coefficient may be set to 1.1 or more and 1.8 or less.
Alternatively, as shown in fig. 1, the electric gap of the capacitor 4 may be set to be the product of the set electric gap and the correction coefficient. Specifically, four capacitors 4 are shown in fig. 1, each capacitor 4 includes ten capacitors, each row includes five capacitors 41, and the gap of the capacitor 4 described herein refers to the distance between the center points of two adjacent capacitors 41 in one row of capacitors 41.
Specifically, the correction coefficient is greater than 1, preferably, the correction coefficient is greater than or equal to 1.1 and less than or equal to 1.8, the electric gap of the capacitor 4 is set to be the product of the set electric gap and the correction coefficient, the heat dissipation performance of the high-altitude power capacitor device in the high-altitude area during working operation is improved, and meanwhile, the increase of the electric gap enables the air gap between charged bodies in the capacitor 4 to be increased, so that the high-altitude power capacitor device has sufficient breakdown resistance when used in a high altitude environment. Illustratively, the electrical gap of the capacitor 4 may be set to 250 mm or more.
Alternatively, as shown in fig. 1, the electrical gap of at least one of the switch 2, the arrester 3, the discharge coil 6 and the current transformer 7 may be set to be the product of the corresponding set electrical gap and a correction coefficient, preferably, the electrical gaps of the switch 2, the arrester 3, the discharge coil 6 and the current transformer 7 may be set to be the product of the corresponding set electrical gap and a correction coefficient, and the correction coefficient is greater than 1, preferably, greater than or equal to 1.1 and less than or equal to 1.8.
Set up switch 2, arrester 3, discharge coil 6 and current transformer 7's electrical clearance all increases according to the correction coefficient, switch 2 can be improved equally, arrester 3, interval between the live body in discharge coil 6 and current transformer 7, the heat dispersion of high altitude power capacitor device in high altitude area work operation has been improved, the increase of electrical clearance makes switch 2 simultaneously, arrester 3, the air clearance between the live body in discharge coil 6 and current transformer 7 increases, make high altitude power capacitor device have enough resistant breakdown capability when plateau environment uses.
Specifically, the low atmospheric pressure in the high altitude area reduces the voltage of the inner cavity of the lightning arrester 3, which results in a reduction of the power frequency discharge voltage, so the high altitude power capacitor device provided by the embodiment of the present disclosure may select the switch 2 with a strong arc extinguishing performance, select the high-grade lightning arrester 3, and select other high-quality matched discharge coils 6 and current transformers 7, and the electrical gaps and insulation margins of these matched products must be corrected according to the altitude, for example, according to the correction factor.
In addition, the low pressure in the high altitude area easily reduces the partial discharge initial voltage of the high altitude power capacitor device, and the corona initial voltage is reduced, so that the corona corrosion is serious, therefore, in the high altitude power capacitor device provided by the embodiment of the disclosure, the diameter of the conductor and the contact area of the conductor can be increased, the sharp corner is prevented from appearing in the shape design of the capacitor frame, and the smooth and burr-free surfaces of the conductor and other metal parts are ensured in the process treatment, so that the corona corrosion problem is improved.
Optionally, the insulating protective material adopted by the bird-proof cap can be made of rubber. Specifically, the increasing rate of the ultraviolet radiation illumination along with the elevation is much larger than the increasing rate of the solar total radiation illumination along with the elevation, when the elevation is 3000 meters, the ultraviolet radiation illumination reaches twice of the corresponding value when the elevation is low, and the ultraviolet rays can cause the accelerated aging of the organic insulating material. In addition, the average air temperature and the maximum air temperature of the plateau environment are both reduced along with the rise of the altitude, and the aging of the electrical insulating material and the shortening of the insulating life are accelerated by day-night temperature difference and seasonal temperature difference. The insulating protection material that this disclosed embodiment set up bird prevention cap and adopt includes rubber materials, and the insulating protection material that can also set up the copper strand wires adoption that adopts in the high altitude power capacitor device includes rubber materials, utilizes ageing-resistant and the strong rubber materials of ultraviolet resistance ability, has further improved the high altitude power capacitor device and has got insulating properties when high altitude area work.
Optionally, a sand leakage hole can be arranged on the bird-proof cap. Particularly, the high-altitude areas have more weather, particularly have larger sand storm and less precipitation in the Qinghai-Tibet areas in the west, and sand leakage holes are formed in the bird prevention caps, so that the sand storm resistance of the high-altitude power capacitor device in the high-altitude areas is improved.
Alternatively, as shown in fig. 1, a post insulator provided with at least one of the reactor 1, the switch 2, the arrester 3, and the capacitor 4 may be coated with a glaze material. Illustratively, the glaze layer material may be provided with a thickness of 40 microns or more. Preferably, the post insulators of the reactor 1, the switch 2, the lightning arrester 3 and the capacitor 4 are coated with glaze layer materials, such as brown glaze and glaze layer thickness, so as to improve the adverse effect of windy weather and little precipitation on the high-altitude power capacitor device.
The embodiment of the disclosure provides a high-altitude power capacitor device suitable for high altitude, which selects a post insulator with large creepage distance, enlarges the electric gap between charged bodies, selects a matched product with high insulation grade and excellent technical performance, simultaneously considers the influence of altitude height on corona and discharge voltage, the influence of plateau ultraviolet radiation increase, air temperature reduction and temperature change increase on the high-altitude power capacitor device, and the influence of windy weather and little precipitation on the high-altitude power capacitor device The problem of reduction of the insulation strength of the electrical equipment caused by factors such as high radiation, large temperature difference and the like meets the normal use requirement of the high-altitude power capacitor device in high-altitude areas.
High altitude power capacitor device adopts single star type wiring, and every spare part all adopts the electrical components who is applicable to the high altitude and uses in the high altitude power capacitor device, and every electrical components all has unique design and suits to the insulation level of specific altitude, combines each device together for the whole insulation level of high altitude power capacitor device satisfies specific altitude requirement.
It should be noted that, the embodiments of the present disclosure do not limit the devices included in the high-altitude power capacitor device and the specific distribution positions thereof, and the normal use of the high-altitude power capacitor device in the high-altitude area can be ensured by using the method for improving the working performance of the devices in the high-altitude area provided by the embodiments of the present disclosure.
It is noted that, herein, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high altitude power capacitor device, comprising:
the high-altitude power capacitor device adopts a single-star connection mode, the reactor is horizontally arranged and is arranged in front of the high-altitude power capacitor device, the switches are respectively arranged at two ends of the capacitor, and the discharge coils are symmetrically arranged at two ends of the capacitor;
the creepage distance corresponding to the post insulator of at least one of the reactor, the switch, the arrester and the capacitor is the product of the set creepage distance and the correction coefficient; wherein the correction factor is related to an altitude of a place where the power capacitive device is installed, and the correction factor is greater than 1.
2. A high altitude power capacitor device according to claim 1, characterized in that the electrical clearance of the capacitor is a product of a set electrical clearance and the correction factor.
3. A high altitude power capacitor device according to claim 2, characterized in that the electrical clearance of the capacitor is 250 mm or more.
4. A high altitude power capacitor device according to claim 1, characterized in that the electrical clearance of at least one of the switch, the arrester, the discharge coil and the current transformer is a product of the corresponding set electrical clearance and the correction factor.
5. The high-altitude power capacitor device according to any one of claims 1 to 4, wherein the correction coefficient satisfies the following calculation formula:
wherein Ka is the correction coefficient, m is a correction index, and H is an altitude of an installation site of the power capacitor device.
6. A high altitude power capacitor device according to claim 1, characterized in that the correction coefficient is 1.1 or more and 1.8 or less.
7. A high altitude power capacitor device, according to claim 1, characterized in that the insulating protection material adopted by said bird-proof cap comprises a rubber material.
8. A high altitude power capacitor device, according to claim 1, characterized in that said bird cap is provided with sand leaking holes.
9. A high altitude power capacitor device according to claim 1, characterized in that a post insulator of at least one of the reactor, the switch, the surge arrester and the capacitor is coated with a glaze material.
10. A high altitude power capacitor device according to claim 9, characterized in that the thickness of the glaze layer material is 40 μm or more.
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| CN202011613362.XA CN112802687A (en) | 2020-12-30 | 2020-12-30 | High-altitude power capacitor device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570482A (en) * | 2012-02-13 | 2012-07-11 | 绍兴电力局 | High voltage parallel capacitor device based on neutral point direct grounding mode |
| CN109143138A (en) * | 2018-06-20 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of modified method of extra-high voltage equipment external insulation withstanding voltage height above sea level |
| CN110932151A (en) * | 2019-12-10 | 2020-03-27 | 国网新疆电力有限公司建设分公司 | 66kV parallel capacitor bank arrangement structure suitable for wind snow blowing area |
| CN211456707U (en) * | 2020-03-13 | 2020-09-08 | 中国电建集团青海省电力设计院有限公司 | High-altitude transformer substation parallel capacitor and series reactance arrangement structure |
-
2020
- 2020-12-30 CN CN202011613362.XA patent/CN112802687A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570482A (en) * | 2012-02-13 | 2012-07-11 | 绍兴电力局 | High voltage parallel capacitor device based on neutral point direct grounding mode |
| CN109143138A (en) * | 2018-06-20 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of modified method of extra-high voltage equipment external insulation withstanding voltage height above sea level |
| CN110932151A (en) * | 2019-12-10 | 2020-03-27 | 国网新疆电力有限公司建设分公司 | 66kV parallel capacitor bank arrangement structure suitable for wind snow blowing area |
| CN211456707U (en) * | 2020-03-13 | 2020-09-08 | 中国电建集团青海省电力设计院有限公司 | High-altitude transformer substation parallel capacitor and series reactance arrangement structure |
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Application publication date: 20210514 |