CN106199121B - A kind of capacitance type potential transformer for transient overvoltage monitoring system - Google Patents
A kind of capacitance type potential transformer for transient overvoltage monitoring system Download PDFInfo
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- CN106199121B CN106199121B CN201610533651.6A CN201610533651A CN106199121B CN 106199121 B CN106199121 B CN 106199121B CN 201610533651 A CN201610533651 A CN 201610533651A CN 106199121 B CN106199121 B CN 106199121B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
Abstract
The present invention relates to a kind of capacitance type potential transformers for transient overvoltage monitoring system, including high-voltage capacitance, middle voltage capacitance, intermediate transformer, transient over-voltage monitoring unit, grounding switch, compensation reactor and the first arrester, one end of the high-voltage capacitance connects power grid, the other end is separately connected one end of armature winding in one end and intermediate transformer of middle voltage capacitance, the other end of medium pressure capacitor is separately connected one end of transient over-voltage monitoring unit and one end of compensation reactor, the other end of armature winding is separately connected the other end of compensation reactor and one end of the first arrester in the intermediate transformer, the other end of the other end of the transient over-voltage monitoring unit and the first arrester is grounded, the grounding switch is connected in parallel on the both ends of transient over-voltage monitoring unit.Compared with prior art, the present invention has many advantages, such as that working frequency is high, measure data precision is high, applied widely.
Description
Technical field
The present invention relates to electrical engineering fields, more particularly, to a kind of capacitive battery for transient overvoltage monitoring system
Press mutual inductor.
Background technique
Power grid transient process is the important characterization of operation of power networks state, currently, for transient overvoltage (thunder and lightning in power grid
Wave, operation wave overvoltage), still lack effective measurement or monitoring means both at home and abroad.For creating equipment, the country only has part electricity
Unit of force carries out the test of switching overvoltage to 500kV system before formally putting into operation, usually to switching nonloaded line, main transformer pressure
Transient measuring is carried out when device, low tension reactor or capacitor, as the electrification examination to new equipment.It is external favorably to use optical fiber technology
The report being monitored.
For running equipment, the GPF (General Protection False recording device installed at present can only record power-frequency overvoltage information.Current
Dispatching monitor and control system, intellectual monitoring and early warning system and power grid wide area real-time dynamic monitoring system are mainly from the dynamic of entire power grid
The angle of state and steady stability monitors operation of power networks characteristic quantity in real time, and then predicts the stabilization of power grids shape of future time instance
State, and early warning is generated to system unstable factor, the stable operation of electric system has been ensured from entire power grid angle.But due to being
The limitation for total capacity of uniting, the sample frequency of equipment will not be too high, in addition, be limited to the Frequency Response of sample devices, at present these
The system monitorings such as Dispatching monitor and control system system cannot effectively monitor transient state process of electric power system, therefore, can not be right
The operating status of electric system carries out comprehensive monitoring.
It is therefore desirable to provide a kind of capacitance type potential transformer for transient overvoltage monitoring system, intelligence electricity is adapted to
The information-based functional requirement with automation of net, meets the requirement of overvoltage and the development of Insulation Coordination technology.
Summary of the invention
It is excessively electric for transient state that it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind
The capacitance type potential transformer of pressure monitoring system has many advantages, such as that working frequency is high, measure data precision is high, applied widely.
The purpose of the present invention can be achieved through the following technical solutions:
It is a kind of for transient overvoltage monitoring system capacitance type potential transformer, including high-voltage capacitance, middle voltage capacitance, in
Between transformer, transient over-voltage monitoring unit, grounding switch, compensation reactor and the first arrester, the one of the high-voltage capacitance
End connection power grid, the other end are separately connected one end of armature winding in one end and intermediate transformer of middle voltage capacitance, medium pressure
The other end of capacitor is separately connected one end of transient over-voltage monitoring unit and one end of compensation reactor, the intermediate transformer
The other end of middle armature winding is separately connected the other end of compensation reactor and one end of the first arrester, the transient overvoltage
The other end of the other end of monitoring unit and the first arrester is grounded, and it is single that the grounding switch is connected in parallel on transient overvoltage monitoring
The both ends of member.
It further include the second arrester, second arrester is connected in parallel on the both ends of transient over-voltage monitoring unit.
The compensation reactor is the adjustable resistor of reactance value.
It further include damper, the damper is set in intermediate transformer on secondary windings.
It further include portable protective gaps, the portable protective gaps are connected in parallel on the both ends of transient over-voltage monitoring unit.
The transient over-voltage monitoring unit is made of multiple noninductive capacity cells parallel with one another, multiple noninductive capacitor members
Part presses coaxial circumference structural arrangement.
The both ends of the multiple noninductive capacity cell are respectively equipped with a disc type connecting terminal, each disc type connecting terminal
It include dielectric disc, multiple conductive fan blades, ribs of the fan, cylinder, driven gear and connecting terminal, the multiple conduction fan blades difference
Covering of the fan is formed on ribs of the fan, is embedded on the side that each conduction fan blades is contacted with noninductive capacity cell with bevelled conduction
Block is equipped with spring between the conducting block and conductive fan blades, the inclined-plane direction of conducting block is identical as the expansion direction of ribs of the fan, described
Ribs of the fan and conductive fan blades abutting are arranged on an end face of dielectric disc, and the connecting terminal is set in the turning end of ribs of the fan, and
On dielectric disc center to other end, the driven gear is set on connecting terminal, and the telescopic rod of the cylinder is equipped with
Rack gear, the rack gear are meshed with driven gear, and the cylinder is set on the other end of dielectric disc；
When increasing the quantity for accessing noninductive capacity cell, the telescopic rod of cylinder stretches out, and driven gear is driven to rotate, ribs of the fan
Rotation, and then conductive fan blades is successively unfolded, conducting block pops up under the action of the spring, and contacts noninductive capacity cell.
The connecting terminal includes rotating bar and wiring end cover, and one end of the rotating bar is set in the turning end of ribs of the fan,
The wiring end cover lid is set on the other end of rotating bar, and is slidably connected with the end of rotating bar, and wiring end cover holding position is not
It is dynamic.
Ball is equipped between the wiring end cover and the end of rotating bar.
The rack gear and driven gear are made by insulating materials.
Compared with prior art, the invention has the following advantages that
1) working frequency is high, and measure data precision is high: not only have the function of conventional CVT (capacitance type potential transformer),
Such as voltage measurement and used for relay protection, the measurement online harmonic wave of high-pressure unit extra-high voltage can be also used for and to network voltage
Waveform is observed and is measured in real time, and the first arrester and the second arrester is arranged, can be effectively prevented caused by overvoltage
Transient over-voltage monitoring unit is protected in damage, particularly suitable as transmitting electricity in transient overvoltage monitoring system for coupling 500kV
The sensor of line over-voltage.
2) applied widely: setting disc type connecting terminal realizes noninductive capacity cell access CVT using sector structure
The automatic adjusument of quantity can be effectively prevented frictional static using cylinder, dielectric disc, guarantee transient overvoltage monitoring
Unit can long-term stable work.
Detailed description of the invention
Fig. 1 is the electrical block diagram of capacitance type potential transformer of the present invention；
Fig. 2 is the overlooking structure diagram of disc type connecting terminal；
Fig. 3 is the present invention looks up structural representation of disc type connecting terminal；
Fig. 4 is transient over-voltage monitoring unit and standard impulse divider exemplary waveform diagram under operating impulse voltage；
Fig. 5 is transient over-voltage monitoring unit and standard impulse divider typical frequency spectrum figure under operating impulse voltage；
Fig. 6 is transient over-voltage monitoring unit and standard impulse divider exemplary waveform diagram under lightning impulse voltage；
Fig. 7 is transient over-voltage monitoring unit and standard impulse divider typical frequency spectrum figure under lightning impulse voltage；
Fig. 8 is the structural schematic diagram that transient overvoltage monitors system.
In figure: 1, power grid, 2, capacitance type potential transformer, 3, transmission cable, 4, protector, 5, communications optical cable, 6, transient state
Voltage collector, 7, communication cable, 8, industrial personal computer, 201, dielectric disc, 202, conductive fan blades, 203, ribs of the fan, 204, cylinder,
205, driven gear, 206, connecting terminal, 207, conducting block, C1, high-voltage capacitance, C2, middle voltage capacitance, C3, transient overvoltage prison
Unit is surveyed, T, intermediate transformer, K, grounding switch, L, compensation reactor, ZD, damper, P, portable protective gaps, BL1, first are taken shelter from the thunder
Device, BL2, the second arrester.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, a kind of capacitance type potential transformer 2 for transient overvoltage monitoring system, including high-voltage capacitance
C1, middle voltage capacitance C2, intermediate transformer T, transient over-voltage monitoring unit C3, grounding switch K, compensation reactor L, damper
One end connection power grid 1 of ZD, portable protective gaps P, the first arrester BL1 and the second arrester BL2, high-voltage capacitance C1, the other end point
Not Lian Jie in one end of voltage capacitance C2 and one end of armature winding in intermediate transformer T, the other end of middle voltage capacitance C2 connects respectively
One end of transient over-voltage monitoring unit C3 and one end of compensation reactor L are connect, the other end of armature winding in intermediate transformer T
It is separately connected the other end of compensation reactor L and one end of the first arrester BL1, the other end of transient over-voltage monitoring unit C3
It is grounded with the other end of the first arrester BL1, grounding switch K, portable protective gaps P and the second arrester BL2 are connected in parallel on respectively
The both ends of transient over-voltage monitoring unit C3, damper ZD are set in intermediate transformer T on secondary windings, wherein compensating reactance
Device L is the adjustable resistor of reactance value, and the reactance value of compensation reactor L and the equivalent capacitance of capacitance type potential transformer 2 are in volume
The capacitive reactance determined under frequency is equal, to make to obtain between primary voltage and secondary voltage under different secondary loads correctly
Phase and no-load voltage ratio.N is the low-pressure end of middle voltage capacitance C2 in Fig. 1, and 1a, 1n, 2a, 2n, da1, da2, dan are intermediate transformer T's
Secondary windings output end.
Transient over-voltage monitoring unit C3 is made of multiple noninductive capacity cells parallel with one another, multiple noninductive capacity cells
By coaxial circumference structural arrangement, voltage capacitance C2 low-pressure end N is gone here and there in the high-voltage end of transient over-voltage monitoring unit C3 and the inside CVT
Connection, ground terminal copper sheet or copper strips reliable ground, measurement terminal are based on coaxial cable using modular connection and send voltage signal
To digital collection instrument.
The both ends of multiple noninductive capacity cells are respectively equipped with a disc type connecting terminal 206, as shown in Figures 2 and 3, each
Disc type connecting terminal 206 includes dielectric disc 201, multiple conductive fan blades 202, ribs of the fan 203, cylinder 204, driven gear
205 and connecting terminal 206, multiple conduction fan blades 202, which are respectively arranged on ribs of the fan 203, forms covering of the fan, each conduction fan blades 202 and nothing
It is embedded on the side of sense capacity cell contact with bevelled conducting block 207, is set between conducting block 207 and conductive fan blades 202
There is spring, the inclined-plane direction of conducting block 207 is identical as the expansion direction of ribs of the fan 203, and ribs of the fan 203 and the conductive abutting of fan blades 202 are set
It sets on an end face of dielectric disc 201, connecting terminal 206 is set in the turning end of ribs of the fan 203, and passes through dielectric disc 201
On center to other end, driven gear 205 is set on connecting terminal 206, and the telescopic rod of cylinder 204 is equipped with rack gear, rack gear with
Driven gear 205 is meshed, and cylinder 204 is set on the other end of dielectric disc 201.
Connecting terminal 206 includes rotating bar and wiring end cover, and one end of rotating bar is set in the turning end of ribs of the fan 203, connects
Line end lid lid is set on the other end of rotating bar, and is slidably connected with the end of rotating bar, and wiring end cover holding position is motionless.
Ball is equipped between wiring end cover and the end of rotating bar, keep connecting terminal 206 and external transmission cable 3 it
Between position stablize, and frictional force is small, wears small.Rack gear and driven gear 205 are made by insulating materials, are effectively prevented
Frictional static.
When if desired increasing the capacitance of transient over-voltage monitoring unit C3, then increase the number for accessing noninductive capacity cell
Amount, the telescopic rod of cylinder 204 stretch out, and driven gear 205 is driven to rotate, and ribs of the fan 203, which rotates, to be simultaneously unfolded, and then have internal layer to outer
Conductive fan blades 202 is successively unfolded in layer, and conducting block 207 pops up under the action of the spring, and contacts noninductive capacity cell.
When if desired reducing the capacitance of transient over-voltage monitoring unit C3, then the number for accessing noninductive capacity cell is reduced
Amount, the telescopic rod of cylinder 204 retract, and driven gear 205 is driven to rotate, and ribs of the fan 203, which rotates, simultaneously to be withdrawn, and then by outer layer to interior
Layer successively withdraws conductive fan blades 202, conductive fan blades 202 of the conducting block 207 in each conductive fan blades 202 by adjacent outward layer
Extruding, spring-compressed, conducting block 207 leaves noninductive capacity cell.
Fig. 4-7 shows comparison of wave shape when one embodiment of the invention and standard impulse divider measure simultaneously.Test knot
Fruit from embodiment be based on common 500kV capacitance type potential transformer repacking after, high reprimand hall in carry out surge voltage examination
Performance verification is tested to obtain.Amplitude is that standard impulse divider measures numerical value in figure, and low amplitude value is that monitoring unit measures numerical value.
As shown in figure 8, transient overvoltage monitoring system, any shape occurred in Operation of Electric Systems equipment can be constructed
Transient voltage of formula, including power-frequency overvoltage, switching overvoltage and lightning surge etc..It includes electricity that transient overvoltage, which monitors system,
Appearance formula voltage transformer 2, protector 4, transient voltage collector 6 and industrial personal computer 8, capacitance type potential transformer 2 and power grid 1 are (defeated
Electric line or bus) it connects, capacitance type potential transformer 2 is connect by transmission cable 3 with protector 4, and protector 4 passes through communication
Optical cable 5 is connect with transient voltage collector 6, and transient voltage collector 6 is connect by communication cable 7 with industrial personal computer 8.Transient state is excessively electric
Pressure on-line monitoring is exactly by partial pressure sensor, by means of Signal Collection Technology, the voltage disturbance of real-time monitoring network system, note
The waveform and various parameters of record and preservation transient overvoltage when occurring before and after the amplitude of each phase voltage, failure.And have at signal
Reason and parameter extraction, using with analysis (alarm, the inquiry of historical data and statistics etc.) function.
Transient over-voltage monitoring unit C3 built in capacitance type potential transformer of the invention, with high-voltage capacitance C1 and middle pressure
Capacitor C2 constitutes capacitor voltage divider, to obtain accurate transient overvoltage waveform simultaneously based on monitoring unit C3
The measurement of power-frequency voltage signal can be taken into account simultaneously.
Claims (8)
1. a kind of capacitance type potential transformer for transient overvoltage monitoring system, including high-voltage capacitance, middle voltage capacitance, centre
Transformer, transient over-voltage monitoring unit, grounding switch and compensation reactor, which is characterized in that further include the first arrester, institute
One end connection power grid of high-voltage capacitance is stated, the other end is separately connected armature winding in one end and intermediate transformer of middle voltage capacitance
One end, the other end of medium pressure capacitor are separately connected one end of transient over-voltage monitoring unit and one end of compensation reactor,
The other end of armature winding is separately connected the other end of compensation reactor and one end of the first arrester in the intermediate transformer,
The other end of the other end of the transient over-voltage monitoring unit and the first arrester is grounded, and the grounding switch is connected in parallel on temporarily
The both ends of state over-voltage monitoring unit；
The transient over-voltage monitoring unit is made of multiple noninductive capacity cells parallel with one another, and multiple noninductive capacity cells are pressed
Coaxial circumference structural arrangement；
The both ends of the multiple noninductive capacity cell are respectively equipped with a disc type connecting terminal, and each disc type connecting terminal wraps
Dielectric disc, multiple conductive fan blades, ribs of the fan, cylinder, driven gear and connecting terminal are included, the multiple conduction fan blades is respectively arranged on
Covering of the fan is formed on ribs of the fan, is embedded on the side that each conduction fan blades is contacted with noninductive capacity cell with bevelled conducting block,
Spring, inclined-plane direction, the fan identical as the expansion direction of ribs of the fan of conducting block are equipped between the conducting block and conductive fan blades
Bone and conductive fan blades abutting are arranged on an end face of dielectric disc, and the connecting terminal is set in the turning end of ribs of the fan, and is worn
It crosses on dielectric disc center to other end, the driven gear is set on connecting terminal, and the telescopic rod of the cylinder is equipped with tooth
Item, the rack gear are meshed with driven gear, and the cylinder is set on the other end of dielectric disc；
When increasing the quantity for accessing noninductive capacity cell, the telescopic rod of cylinder stretches out, and driven gear is driven to rotate, and ribs of the fan turns
It is dynamic, and then conductive fan blades is successively unfolded, conducting block pops up under the action of the spring, and contacts noninductive capacity cell；
When reducing the quantity for accessing noninductive capacity cell, the telescopic rod of cylinder is retracted, and driven gear is driven to rotate, ribs of the fan rotation
And withdraw, and then conductive fan blades is successively withdrawn by outer layer to internal layer, the conducting block in each conductive fan blades is by adjacent outward layer
Conductive fan blades extruding, spring-compressed, conducting block leaves noninductive capacity cell.
2. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 1, feature
It is, further includes the second arrester, second arrester is connected in parallel on the both ends of transient over-voltage monitoring unit.
3. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 1, feature
It is, the compensation reactor is the adjustable resistor of reactance value.
4. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 1, feature
It is, further includes damper, the damper is set in intermediate transformer on secondary windings.
5. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 1, feature
It is, further includes portable protective gaps, the portable protective gaps is connected in parallel on the both ends of transient over-voltage monitoring unit.
6. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 1, feature
It is, the connecting terminal includes rotating bar and wiring end cover, and one end of the rotating bar is set in the turning end of ribs of the fan, described
Wiring end cover lid is set on the other end of rotating bar, and is slidably connected with the end of rotating bar, and wiring end cover holding position is motionless.
7. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 6, feature
It is, ball is equipped between the wiring end cover and the end of rotating bar.
8. a kind of capacitance type potential transformer for transient overvoltage monitoring system according to claim 1, feature
It is, the rack gear and driven gear are made by insulating materials.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610533651.6A CN106199121B (en) | 2016-07-08 | 2016-07-08 | A kind of capacitance type potential transformer for transient overvoltage monitoring system |
| PCT/CN2017/092280 WO2018006876A1 (en) | 2016-07-08 | 2017-07-07 | Capacitive voltage mutual inductor for transient over-voltage monitoring system |
| JP2017564669A JP6547217B2 (en) | 2016-07-08 | 2017-07-07 | Capacitor-type instrument transformer for transient overvoltage monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610533651.6A CN106199121B (en) | 2016-07-08 | 2016-07-08 | A kind of capacitance type potential transformer for transient overvoltage monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106199121A CN106199121A (en) | 2016-12-07 |
| CN106199121B true CN106199121B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610533651.6A Active CN106199121B (en) | 2016-07-08 | 2016-07-08 | A kind of capacitance type potential transformer for transient overvoltage monitoring system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6547217B2 (en) |
| CN (1) | CN106199121B (en) |
| WO (1) | WO2018006876A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199121B (en) * | 2016-07-08 | 2019-03-08 | 国网上海市电力公司 | A kind of capacitance type potential transformer for transient overvoltage monitoring system |
| CN106970268B (en) * | 2017-02-28 | 2019-07-16 | 上海交通大学 | Single-phase overhead transmission line of electricity phase voltage method for self-calibrating based on shunt capacitance |
| WO2019194754A1 (en) * | 2018-04-04 | 2019-10-10 | Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Link box with built-in insulator type voltage divider and inductive partial discharge sensor |
| CN111029118A (en) * | 2020-01-16 | 2020-04-17 | 郑州三晖互感器有限公司 | High-voltage electromagnetic voltage proportion standard error compensation method |
| CN111239666A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Transient characteristic test system of far-end module box |
| CN112180162A (en) * | 2020-09-27 | 2021-01-05 | 江苏思源赫兹互感器有限公司 | Harmonic detection system based on capacitive voltage transformer |
| CN112285411B (en) * | 2020-10-22 | 2023-05-02 | 国网四川省电力公司电力科学研究院 | CVT nonlinear model, model-based system and method for measuring voltage |
| CN112834808B (en) * | 2020-12-31 | 2023-02-17 | 广东电网有限责任公司电力科学研究院 | Lightning invasion wave monitoring method and system |
| CN112986667B (en) * | 2021-02-22 | 2024-02-23 | 国网陕西省电力公司电力科学研究院 | Voltage digital signal measuring method and system for CVT voltage quality measurement |
| CN113410035B (en) * | 2021-06-25 | 2023-06-23 | 河北旭辉电气股份有限公司 | Anti-resonance voltage transformer with grounding compensation function based on Y-shaped wiring |
| CN113759159B (en) * | 2021-09-29 | 2023-12-29 | 国网陕西省电力公司电力科学研究院 | Capacitive voltage transformer with function of outputting capacitive current signals |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6547217B2 (en) | 2019-07-24 |
| WO2018006876A1 (en) | 2018-01-11 |
| CN106199121A (en) | 2016-12-07 |
| JP2018532249A (en) | 2018-11-01 |
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Inventor after: Zhao Dandan Inventor after: Huang Hua Inventor after: Zhao Wenbin Inventor after: Si Wenrong Inventor after: Jin Hang Inventor after: Ye Hongbo Inventor after: Li Jun Inventor after: Zhou Xingxing Inventor after: Zou Jian Inventor before: Zou Jian Inventor before: Ye Hongbo Inventor before: Li Jun Inventor before: Jin Hang Inventor before: Si Wenrong Inventor before: Zhao Wenbin Inventor before: Zhao Dandan Inventor before: Zhou Xingxing Inventor before: Huang Hua |
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Address after: 200002 No. 181 East Nanjing Road, Shanghai, Huangpu District Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee after: EAST CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Patentee after: SHANGHAI HENGNENGTAI ENTERPRISE MANAGEMENT Co.,Ltd. Patentee after: Shanghai Electric Power University Address before: 200002 No. 181 East Nanjing Road, Shanghai, Huangpu District Patentee before: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee before: EAST CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Patentee before: SHANGHAI HENGNENGTAI ENTERPRISE MANAGEMENT Co.,Ltd. Patentee before: SHANGHAI University OF ELECTRIC POWER |