CN107317294B - Method and system for insulation protection of extra-high voltage half-wavelength power transmission line based on power fluctuation - Google Patents
Method and system for insulation protection of extra-high voltage half-wavelength power transmission line based on power fluctuation Download PDFInfo
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- 238000009413 insulation Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims description 5
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/60—Detecting; Measuring; Sensing; Testing; Simulating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/80—Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
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Abstract
The invention discloses an insulation protection method of an extra-high voltage half-wavelength transmission line based on power fluctuation, which comprises the following steps: determining an air gap limit value of the extra-high voltage half-wavelength alternating-current transmission line; according to the power frequency discharge test arrangement of the ultra-high voltage single-circuit alternating-current transmission line, acquiring a power frequency discharge voltage curve of the ultra-high voltage single-circuit alternating-current transmission line to a tower body gap, and determining power frequency 50% discharge voltage corresponding to the air gap limit value; calculating operation impact discharge voltage according to a safety factor, a matching coefficient and the power frequency discharge voltage; and determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage. The installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line can guarantee the operation of the extra-high voltage half-wavelength single-circuit transmission line, can reduce the installation number of the lightning arresters, is economical and reasonable, and meets the requirement of the limit value of the operation overvoltage.
Description
Technical Field
The invention relates to the technical field of transmission line insulation, in particular to a method and a system for insulation protection of an extra-high voltage half-wavelength transmission line based on power fluctuation.
Background
Half-wavelength AC Transmission (HWACT) refers to a three-phase AC Transmission technique in which the electrical distance for Transmission is close to one power frequency Half-Wave, i.e., an ultra-long distance of about 3000km (50Hz) or 2500km (60 Hz). The half-wavelength power transmission does not need a line reactive power compensation device (such as a high-voltage reactor) and a switching station, has better economy and reliability, can realize remote synchronous networking, has strong attraction, and is practically researched in some countries. China has uneven energy distribution, and a long-distance and large-capacity power transmission mode is inevitable. The distance from some energy bases to the load center is close to the power frequency half-wavelength range required by half-wavelength power transmission, and the extra-high voltage half-wavelength power transmission technology can be used as an alternative scheme for sending out the large-capacity power.
The extra-high voltage half-wavelength power transmission technology has the advantages of long transmission distance and no need of building an intermediate switching station, but the characteristics of running voltage, power frequency overvoltage and operation overvoltage along a line and overvoltage limiting measures are obviously different from the traditional extra-high voltage power transmission technology, the voltage along the line is increased when the transmission power of the line exceeds natural power or the power factor is lower due to the particularity of the steady-state voltage distribution of the half-wavelength power transmission line, and the voltage per unit value is about the ratio of the transmission power to the natural power. And further causes high overvoltage amplitude and long duration under power fluctuation in the fault process and the system swinging process after the fault, if a traditional extra-high voltage insulation matching method is adopted, a large number of lightning arresters are required to limit the overvoltage to 1.7 p.u..
Therefore, a technique is needed to realize the insulation protection of the extra-high voltage half-wavelength transmission line based on the power fluctuation.
Disclosure of Invention
The invention provides a method and a system for insulation coordination of an extra-high voltage half-wavelength power transmission line based on power fluctuation, and aims to solve the problem of how to perform insulation protection on the extra-high voltage half-wavelength power transmission line based on power fluctuation.
In order to solve the above problems, the present invention provides a method for insulation protection of an extra-high voltage half-wavelength transmission line based on power fluctuation, the method comprising:
determining an air gap limit value of the extra-high voltage half-wavelength alternating-current transmission line;
according to the power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap, and determining power frequency 50% discharge voltage corresponding to the air gap limit value;
calculating operation impulse discharge voltage according to a safety factor, a matching coefficient and the power frequency 50% discharge voltage;
and determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage.
Preferably, when the operating surge discharge voltage is calculated, the reference factors include:
50% of maximum wind speed in the last 100 years;
statistical operating impulse discharge voltage;
the effect of multiple gap parallel on the discharge voltage.
Preferably, the value range of the I string is 1.1-1.26, and the value range of the V string is 1.27.
Preferably, the safety factor takes the value 1.
Preferably, the minimum operating surge discharge voltage limit is in the range of 1.78p.u. to 1.80p.u.
Preferably, the determining of the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line comprises the following steps:
and 80 groups of lightning arresters with rated voltage of 900kV are installed.
Based on another aspect of the present invention, a system for insulation protection of an extra-high voltage half-wavelength power transmission line based on power fluctuation is provided, the system comprising:
the obtaining unit is used for determining the air gap limit value of the extra-high voltage half-wavelength alternating current transmission line;
the determining unit is used for acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap according to the power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, and determining power frequency 50% discharge voltage corresponding to the air gap limit value;
the calculation unit is used for calculating the operation impact discharge voltage according to the safety factor, the matching coefficient and the power frequency 50% discharge voltage;
and the result unit is used for determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage.
Preferably, when the calculating unit calculates the operation surge discharge voltage, the reference factors include:
50% of maximum wind speed in the last 100 years;
statistical operating impulse discharge voltage;
the effect of multiple gap parallel on the discharge voltage.
Preferably, the value range of the I string is 1.1-1.26, and the value range of the V string is 1.27.
Preferably, the safety factor is 1.
Preferably, the minimum operating surge discharge voltage limit is in the range of 1.78p.u. to 1.80p.u.
Preferably, the determining of the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line comprises the following steps:
and 80 groups of lightning arresters with rated voltage of 900kV are installed.
The invention provides a method for insulation protection of an extra-high voltage half-wavelength power transmission line based on power fluctuation, which determines an air gap under the operation overvoltage of the extra-high voltage half-wavelength alternating current power transmission line according to the regulation of 1000kV extra-high voltage alternating current power transmission and transformation project overvoltage and insulation coordination of GB 24842-2009. And acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap through power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, and determining power frequency 50% discharge voltage corresponding to the air gap limit value. According to the method, the operation impulse discharge voltage is calculated according to the safety factor, the matching coefficient and the power frequency 50% discharge voltage, and the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line is determined based on the operation impulse discharge voltage. The installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line can guarantee the operation of the extra-high voltage half-wavelength single-circuit transmission line, can reduce the installation number of the lightning arresters, is economical and reasonable, and meets the requirement of the limit value of the operation overvoltage.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method for insulation protection of an extra-high voltage half-wavelength transmission line based on power fluctuation according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a cat-head tower side-phase power frequency discharge test arrangement according to an embodiment of the invention;
FIG. 3 is a power frequency discharge voltage curve of the transmission line to the tower gap according to an embodiment of the present invention;
fig. 4 is a system structure diagram of insulation protection of an extra-high voltage half-wavelength transmission line based on power fluctuation according to an embodiment of the invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of an insulation coordination method for an extra-high voltage half-wavelength transmission line based on power fluctuation according to an embodiment of the present invention. According to the method for insulation matching of the extra-high voltage half-wavelength transmission line based on power fluctuation, provided by the embodiment of the invention, the air gap under the operation overvoltage of the extra-high voltage half-wavelength transmission line is determined according to the regulation of 1000kV extra-high voltage alternating current transmission and transformation engineering overvoltage and insulation matching of GB 24842-2009. And acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap through power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, and determining power frequency 50% discharge voltage corresponding to the air gap limit value. According to the embodiment of the invention, the operation impulse discharge voltage is calculated according to the safety factor, the matching coefficient and the power frequency 50% discharge voltage, and the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line is determined based on the operation impulse discharge voltage. As shown in fig. 1, the method 100 begins at step 101:
preferably, in step 101: and determining the air gap limit value of the extra-high voltage half-wavelength alternating current transmission line. According to GB24842-2009 overvoltage and insulation coordination of 1000kV ultrahigh voltage alternating current transmission and transformation engineering, the air gap under the operation overvoltage of the ultrahigh voltage alternating current transmission line is regulated, and the specific air gap requirement value under the operation overvoltage is shown in Table 1. Table 1 shows the air gap requirement values of a 1000KV extra-high voltage ac transmission line under an operation overvoltage, when the altitude of the transmission line is 500m, 1000m, 1500m, and when the operation such as closing is performed.
TABLE 1
Preferably, at step 102: and according to the power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap, and determining power frequency 50% discharge voltage corresponding to the air gap limit value. The ultra-high voltage alternating current test base determines a power frequency discharge test layout of an ultra-high voltage single-circuit transmission line, as shown in fig. 2. The application provides a power frequency discharge voltage curve of a transmission line conductor to a tower body gap, as shown in fig. 3.
FIG. 2 is a power frequency discharge test layout diagram of an extra-high voltage single-circuit transmission line, a typical extra-high voltage alternating current transmission line cat-head tower adopts a 1:1 true tower head, and a conductor adopts a 1:1 simulated split hard conductor. Under strong wind, the suspension insulator device can generate a wind deflection angle, and the wind deflection angle is 48 degrees during a power frequency voltage test. The wire to tower distance d is the selected trial clearance distance.
Fig. 3 is a power frequency discharge voltage U50% curve diagram of the transmission line conductor to the tower body gap. Fig. 3 shows the corresponding power frequency discharge voltage U50% value when the air gap d is 1.5m, the power frequency discharge voltage U50% value when d is 2.5m, and the power frequency discharge voltage U50% value when d is 3.5m, respectively. As shown in fig. 3, the power frequency discharge voltage U50% value and the air gap d satisfy a linear relationship.
Preferably, in step 103: and calculating the operation impact discharge voltage according to the safety factor, the matching coefficient and the power frequency 50% discharge voltage. The calculation conditions to be selected for consideration in calculating the operating surge discharge voltage include: and counting the influence of the operating impulse discharge voltage on the operating impulse discharge voltage by the multi-gap parallel connection in 50% of the maximum wind speed within 100 years.
The 50% operating surge voltage for a single air gap is calculated by equation (1):
u50.1.r＝kskcUs(1)
in formula (1):
ksfor safety factor, the value of the application is 1;
kcthe value range of the I string is 1.1-1.26, and the value range of the V string is 1.27 for the matching coefficient;
us is the operating impulse discharge voltage of the transmission line, kV;
u50.1.ris the power frequency discharge voltage U50%.
According to the method 100, the minimum value of the calculated operation impact discharge voltage limit value is between 1.78p.u. and 1.80p.u. and is larger than the limit value 1.70p.u. required by the operation impact discharge voltage of the conventional ultrahigh voltage alternating current transmission line.
Preferably, at step 104: and determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage. The lightning arrester installation scheme for determining the extra-high voltage half-wavelength single-circuit transmission line along the line comprises the following steps: and 80 groups of lightning arresters with rated voltage of 900kV are installed. According to the embodiment of the application, when 80 groups of lightning arresters with rated voltage of 900kV are installed along the power transmission line, the discharge voltage can be controlled to be 1.75p.u., and the duration is 3s, so that the safe operation of the system can be ensured, the system is economical and reasonable, and the limit value requirement of the operation impact discharge voltage is also met.
According to the embodiment of the application, when 116 groups of arresters with the rated voltage of 948kV are installed along the power transmission conductor, the discharge voltage level is controlled to be 1.79p.u., the duration is about 3s, and the arresters can meet the voltage tolerance requirement.
The embodiment of the invention provides an insulation processing method of an extra-high voltage half-wavelength transmission line based on power fluctuation, because the simulation waveform of the extra-high voltage half-wavelength operation overvoltage is similar to the waveform of a power frequency overvoltage, when insulation matching is carried out, the size of the operation impulse voltage is determined according to the limit value of an operation gap and a method for carrying out insulation processing on the operation impulse voltage, and the arrangement of lightning arresters along the line is carried out according to the calculation result of the operation impulse voltage by combining a power frequency discharge voltage curve. The lightning arrester arrangement scheme of the embodiment of the application is economical and reasonable, reduces the cost of insulation protection, meets the limit value requirement of the operation impact voltage, and enables a power transmission system to run safely.
Fig. 4 is a system structure diagram of insulation coordination of an extra-high voltage half-wavelength transmission line based on power fluctuation according to an embodiment of the invention. As shown in fig. 4, a system 400 for insulation protection of an extra-high voltage half-wavelength power transmission line based on power fluctuation according to an embodiment of the present invention includes:
the obtaining unit 401 is configured to determine an air gap limit value of the extra-high voltage half-wavelength alternating current transmission line.
And the determining unit 402 is configured to obtain a power frequency discharge voltage curve of the extra-high voltage alternating-current transmission line to the tower body gap according to a power frequency discharge test arrangement of the extra-high voltage single-circuit transmission line, and determine a power frequency 50% discharge voltage corresponding to the air gap limit value.
And the calculating unit 403 is configured to calculate an operation impulse discharge voltage according to the safety factor, the matching coefficient, and the power frequency 50% discharge voltage.
Preferably, the reference factors of the calculating unit 403 in calculating the operation surge discharge voltage include: 50% of maximum wind speed in the last 100 years; statistical operating impulse discharge voltage; the effect of multiple gap parallel on the discharge voltage.
Preferably, the value range of the I string is 1.1-1.26 and the value range of the V string is 1.27 in the matching coefficient.
Preferably, the safety factor takes the value 1.
Preferably, the minimum operating surge discharge voltage limit is in the range of 1.78p.u. to 1.80p.u.
And the result unit 404 is used for determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage. The embodiment of the invention discloses an installation scheme for determining an arrester along an extra-high voltage half-wavelength single-circuit transmission line, which comprises the following steps: and 80 groups of lightning arresters with rated voltage of 900kV are installed.
The system 400 for insulation coordination of the extra-high voltage half-wavelength power transmission line based on power fluctuation in the embodiment of the present invention corresponds to the method 100 for insulation coordination of the extra-high voltage half-wavelength power transmission line based on power fluctuation in the embodiment of the present invention, and is not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (12)
1. A method for insulation protection of an extra-high voltage half-wavelength transmission line based on power fluctuation, the method comprising:
determining an air gap limit value of the extra-high voltage half-wavelength alternating-current transmission line;
according to the power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap, and determining power frequency 50% discharge voltage corresponding to the air gap limit value;
calculating operation impulse discharge voltage according to a safety factor, a matching coefficient and the power frequency 50% discharge voltage;
and determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage.
2. The method of claim 1, wherein the calculating the operating surge discharge voltage reference factors comprise:
50% of maximum wind speed in the last 100 years;
statistical operating impulse discharge voltage;
the effect of multiple gap parallel on the discharge voltage.
3. The method of claim 1, wherein the fitting coefficient has an I string value range of 1.1-1.26 and a V string value range of 1.27.
4. The method of claim 1, wherein the safety factor takes the value of 1.
5. The method of claim 1, the operational surge discharge voltage limit minimum value ranging from 1.78p.u. to 1.80p.u.
6. The method of claim 5, wherein the determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line comprises the following steps:
and 80 groups of lightning arresters with rated voltage of 900kV are installed.
7. A system for insulation protection of an extra-high voltage half-wavelength power transmission line based on power fluctuation, the system comprising:
the obtaining unit is used for determining the air gap limit value of the extra-high voltage half-wavelength alternating current transmission line;
the determining unit is used for acquiring a power frequency discharge voltage curve of the ultra-high voltage alternating current transmission line to the tower body gap according to the power frequency discharge test arrangement of the ultra-high voltage single-circuit transmission line, and determining power frequency 50% discharge voltage corresponding to the air gap limit value;
the calculation unit is used for calculating the operation impact discharge voltage according to the safety factor, the matching coefficient and the power frequency 50% discharge voltage;
and the result unit is used for determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line based on the operation impulse discharge voltage.
8. The system of claim 7, the computing unit, in computing the operating surge discharge voltage, references factors comprising:
50% of maximum wind speed in the last 100 years;
statistical operating impulse discharge voltage;
the effect of multiple gap parallel on the discharge voltage.
9. The system of claim 7, wherein the fitting coefficient has an I string value range of 1.1-1.26 and a V string value range of 1.27.
10. The system of claim 7, wherein the safety factor takes the value of 1.
11. The system of claim 7, the operational surge discharge voltage limit minimum value ranging from 1.78p.u. to 1.80p.u.
12. The system of claim 11, wherein the determining the installation scheme of the lightning arrester along the extra-high voltage half-wavelength single-circuit transmission line comprises:
and 80 groups of lightning arresters with rated voltage of 900kV are installed.
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| CN108963946B (en) * | 2018-06-25 | 2019-12-24 | 国网湖南省电力有限公司 | Method for designing lightning protection and anti-icing device of power transmission line |
| CN109031062B (en) * | 2018-07-16 | 2021-02-09 | 中国南方电网有限责任公司超高压输电公司大理局 | Method and system for calculating 50% discharge voltage under tower gap operation impulse voltage |
| CN109031043B (en) * | 2018-07-24 | 2021-01-05 | 国网山西省电力公司电力科学研究院 | Instantaneous power mutation based half-wavelength alternating current transmission line fault phase selection method |
| CN110718859A (en) * | 2019-10-16 | 2020-01-21 | 国网电力科学研究院武汉南瑞有限责任公司 | Method for selecting series gap of line lightning arresters in direct-current transmission system |
| CN111969544A (en) * | 2020-09-11 | 2020-11-20 | 云南电网有限责任公司带电作业分公司 | Method for installing zinc oxide lightning arrester on 220kV same-tower multi-circuit line in high-altitude area in electrified mode |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03293920A (en) * | 1990-04-09 | 1991-12-25 | Sumitomo Electric Ind Ltd | Method of reducing surge impedance of steel tower |
| CN104833903A (en) * | 2015-03-04 | 2015-08-12 | 国家电网公司 | Method for determining gap distance of surge arresters containing series gapped structures along with altitude change |
| CN105182195A (en) * | 2015-08-26 | 2015-12-23 | 芜湖市凯鑫避雷器有限责任公司 | Gap distance determination method for lightning arrester with series gap |
-
2017
- 2017-07-10 CN CN201710557451.9A patent/CN107317294B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03293920A (en) * | 1990-04-09 | 1991-12-25 | Sumitomo Electric Ind Ltd | Method of reducing surge impedance of steel tower |
| CN104833903A (en) * | 2015-03-04 | 2015-08-12 | 国家电网公司 | Method for determining gap distance of surge arresters containing series gapped structures along with altitude change |
| CN105182195A (en) * | 2015-08-26 | 2015-12-23 | 芜湖市凯鑫避雷器有限责任公司 | Gap distance determination method for lightning arrester with series gap |
Non-Patent Citations (3)
| Title |
|---|
| 1000kV与500kV交流线路同塔架设相间放电特性及绝缘配合;霍锋等;《中国电机工程学报》;20121205;第142-150页 * |
| 交流特高压半波长输电线路绝缘配合研究;彭谦等;《电网技术》;20140430;第1082-1086页 * |
| 特高压半波长输电***绝缘配合研究;张刘春等;《电网技术》;20110930;第13-16页 * |
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Inventor after: Zhang Liuchun Inventor after: Zhang Cuixia Inventor after: Zhang Boyu Inventor after: Shi Weidong Inventor after: Yin Yu Inventor after: Lu Tiantian Inventor after: Lei Ting Inventor after: Ji Jianfei Inventor before: Zhang Liuchun Inventor before: Zhang Cuixia Inventor before: Zhang Boyu Inventor before: Shi Weidong Inventor before: Yin Yu Inventor before: Lu Tiantian Inventor before: Lei Ting |
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Effective date of registration: 20180112 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant after: China Electric Science Research Institute Co., Ltd. Applicant after: State Grid Corporation of China Applicant after: ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID JIANGSU ELECTRIC POWER COMPANY Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant before: China Electric Power Research Institute Applicant before: State Grid Corporation of China |
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