CN105676162A - Low-cost intelligent substation digital electric energy meter calibration device - Google Patents
Low-cost intelligent substation digital electric energy meter calibration device Download PDFInfo
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- CN105676162A CN105676162A CN201610057569.0A CN201610057569A CN105676162A CN 105676162 A CN105676162 A CN 105676162A CN 201610057569 A CN201610057569 A CN 201610057569A CN 105676162 A CN105676162 A CN 105676162A
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- 238000012545 processing Methods 0.000 claims abstract description 46
- 238000004891 communication Methods 0.000 claims description 99
- 230000011664 signaling Effects 0.000 claims description 34
- 230000009977 dual effect Effects 0.000 claims description 16
- 239000013307 optical fiber Substances 0.000 abstract description 25
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000002457 bidirectional effect Effects 0.000 abstract 2
- 238000007726 management method Methods 0.000 description 23
- 238000012360 testing method Methods 0.000 description 17
- 238000012795 verification Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
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- 238000011897 real-time detection Methods 0.000 description 2
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- 230000001360 synchronised effect Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention provides a low-cost intelligent substation digital electric energy meter calibration device which comprises a main control unit, a high-speed data processing unit, a network management unit, an FPGA unit, a touch display screen, a key unit and a power supply management unit, wherein the main control unit is connected with the high-speed data processing unit; the main control unit is respectively electrically connected with the high-speed data processing unit and the touch display screen through bidirectional signals; the main control unit is in signal electrical connection with the key unit; the high-speed data processing unit is also electrically connected with the network management unit and the FPGA unit in a bidirectional signal mode respectively; the power management unit is used for providing working power. The multi-core framework is real-time and efficient in detection and calibration, high in detection precision, friendly in operation interface, rich in interfaces, convenient to access in a calibration site, time-saving and labor-saving, simple in structure, low in cost and convenient to use, and solves the problem that optical fiber digital signals cannot be simultaneously accessed under the condition of on-site real load calibration.
Description
The divisional application of application for a patent for invention that the application is application number to be 201310595243.X, the applying date be on November 22nd, 2013, invention and created name is " calibration device for digital electric energy meter of intelligent substation ".
Technical field
The present invention relates to the intelligent substation gauge check technical field of electric power system, be specifically related to a kind of digitalized electrical energy meter calibration equipment that the three phase electronic multifunctional electric energy meter of the intelligent substation based on IEC6185 standard is examined and determine and tested.
Background technology
Intelligent substation is the important step that intelligent grid is built, transformer station's digitized, intellectuality has become as a kind of trend, digital transformer substation is different from tradition transformer station, its framework is in IEC61850 standard base, adopt the three-decker of process layer, wall and station level, after all electrical measurements all change into, at process layer, the digital signal meeting IEC618509-1,9-2 agreement, passed to process layer or bay device by fiber optic Ethernet. Needing in intelligent substation to use the more digitalized electrical energy meter for measuring, its digital electricity meter used is required for its error etc. is verified at laboratory and when being arranged on intelligent substation reality load operation. Traditional electric energy meter has relatively ripe calibration equipment and relatively more complete vertification regulation and method; And digitalized electrical energy meter is compared with traditional ammeter, its measuring principle and method all there occurs bigger change, it it is no longer traditional dependence analog acquisition, and be based under IEC61850 standard architecture and complete function of measuring by the collection of digitized signal, and communication can be realized by the modes such as network and miscellaneous equipment (such as background computer system). At present, it is possible to preferably digitalized electrical energy meter is particularly carried out under real load condition at the scene at laboratory verification detecting device or the instrument of the relative maturity of high precision test verification, still rare.
Summary of the invention
It is an object of the invention to: lower-cost calibration device for digital electric energy meter of intelligent substation convenient and fast connection when a kind of simple in construction, less costly, rich interface, accuracy of detection height being provided and uses.
The technical scheme is that the lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention, it is structurally characterized in that: include main control unit, high-speed data processing unit, network management unit, FPGA unit, touch display screen, push-button unit and Power Management Unit;
Main control unit is provided with the first communication ends, second communication end, display signal end and push button signalling input; High-speed data processing unit is provided with the first to fifth communication end; Network management unit is provided with data signal communication end and control signal communication ends; FPGA unit is provided with data communication end; Touch display screen and be provided with display signal end; Push-button unit is provided with signal output part;
First communication ends of main control unit electrically connects with the first communication ends two-way signaling of high-speed data processing unit; The second communication end of main control unit electrically connects with the second communication end two-way signaling of high-speed data processing unit; The display signal end of main control unit electrically connects with the display signal end two-way signaling touching display screen; The push button signalling input of main control unit electrically connects with the signal output part signal of push-button unit; The third communication end of high-speed data processing unit electrically connects with the data signal communication end two-way signaling of network management unit; The fourth communication end of high-speed data processing unit electrically connects with the control signal communication ends two-way signaling of network management unit; The fifth communication end of high-speed data processing unit electrically connects with the data communication end two-way signaling of FPGA unit; Power Management Unit is used for providing working power;
Above-mentioned main control unit includes CPU module, flash memory module, SDRAM module, clock module, Network Interface Module, communication interface modules, usb interface module, display module and dual port RAM module; CPU module is provided with communication ends and button signal input; Display module and dual port RAM module are provided with the first communication ends and second communication end respectively;
The flash memory module of main control unit, SDRAM module, clock module, Network Interface Module, communication interface modules and usb interface module electrically connect with CPU module two-way signaling respectively; First communication ends of display module, dual port RAM module the first communication ends electrically connect with CPU module two-way signaling respectively;
The communication ends of CPU module is the first communication ends of main control unit; The second communication end of dual port RAM module is the second communication end of main control unit; The button signal input of CPU module is the push button signalling input of main control unit; The second communication end of display module is the display signal end of main control unit;
Above-mentioned FPGA unit is provided with high-frequency impulse output interface, ammeter pulse input interface and FT3 data-interface.
Further scheme is: above-mentioned high-speed data processing unit includes the 32 bit DSP chips that model is ADSP-BF518, and dominant frequency is 400MHz.
Further scheme is: above-mentioned network management unit is provided with ST optical fiber interface, SC optical fiber interface and RJ45 interface; Wherein, ST optical fiber interface and SC optical fiber interface are respectively provided with 2 respectively; RJ45 interface is provided with 3.
The present invention has positive effect: the lower-cost calibration device for digital electric energy meter of intelligent substation of (1) present invention, adopt the multicore architecture of the processing data information of main control unit, high-speed data processing unit and FPGA unit, guarantee the device detection real-time high-efficiency to digitalized electrical energy meter during for real-time detection check, and accuracy of detection is high. (2) the lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention, main control unit is by arranging network interface, convenient with backstage host computer communication during use; USB interface, RS232 communication interface are set, connect peripheral hardware convenient. (3) the lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention, network management unit 3 is provided with ST optical fiber interface 31, SC optical fiber interface 32 and RJ45 interface 33, facilitate in the access verifying on-the-spot and different optical fiber interface and network interface, without the conversion carrying out interface behind verification scene again, time saving and energy saving;Meanwhile, the problem that optical fiber and digital signal cannot be concurrently accessed when solving the calibrating of on-the-spot real load: traditional field-checking can tester and electric energy meter and pick up, while the voltage of sampling circuit, current signal detect. Digital transformer substation is usually merging point-to-point 61850 messages of unit to digitalized electrical energy meter, merge unit and seldom have reserved test designated lane for on-site proving, the present invention passes through network management unit, the data signal that merging unit is sent synchronizes to forward by many mouthfuls, realize calibration equipment and digitalized electrical energy meter synchronizes to obtain data, such that it is able to realize the dynamic precision test under real load in tested ammeter locality. (4) the lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention, by touching the setting of display screen and push-button unit so that operation and control interface is friendly, easy to use. (5) the lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention, structure is relatively easy, less costly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Accompanying drawing labelling in above-mentioned accompanying drawing is as follows:
Main control unit 1, CPU module 11, flash memory module 12, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface modules 16, usb interface module 17, display module 18, dual port RAM module 19,
High-speed data processing unit 2,
Network management unit 3, ST optical fiber interface 31, SC optical fiber interface 32, RJ45 interface 33,
FPGA unit 4, high-frequency impulse output interface 41, ammeter pulse input interface 42, FT3 data-interface 43,
Touch display screen 5,
Push-button unit 6,
Power Management Unit 7.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
(embodiment 1)
See Fig. 1, the lower-cost calibration device for digital electric energy meter of intelligent substation of the present embodiment, is mainly made up of main control unit 1, high-speed data processing unit 2, network management unit 3, FPGA unit 4, touch display screen 5, push-button unit 6 and Power Management Unit 7.
Main control unit 1 is provided with the first communication ends, second communication end, display signal end and push button signalling input; High-speed data processing unit 2 is provided with the first to fifth communication end; Network management unit 3 is provided with data signal communication end and control signal communication ends; FPGA unit 4 is provided with data communication end; Touch display screen 5 and be provided with display signal end; Push-button unit 6 is provided with signal output part.
First communication ends of main control unit 1 electrically connects with the first communication ends two-way signaling of high-speed data processing unit 2; The second communication end of main control unit 1 electrically connects with the second communication end two-way signaling of high-speed data processing unit 2; The display signal end of main control unit 1 electrically connects with the display signal end two-way signaling touching display screen 5; The push button signalling input of main control unit 1 electrically connects with the signal output part signal of push-button unit 6; The third communication end of high-speed data processing unit 2 electrically connects with the data signal communication end two-way signaling of network management unit 3; The fourth communication end of high-speed data processing unit 2 electrically connects with the control signal communication ends two-way signaling of network management unit 3; The fifth communication end of high-speed data processing unit 2 electrically connects with the data communication end two-way signaling of FPGA unit 4; Power Management Unit 7 provides working power for each unit.
Main control unit 1 is mainly made up of CPU module 11, flash memory module 12, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface modules 16, usb interface module 17, display module 18 and dual port RAM module 19.CPU module 11 is provided with communication ends and button signal input; Display module 18 and dual port RAM module 19 are provided with the first communication ends and second communication end respectively.
The flash memory module 12 of main control unit 1, SDRAM module 13, clock module 14, Network Interface Module 15, communication interface modules 16 and usb interface module 17 electrically connect with CPU module 11 two-way signaling respectively; First communication ends of display module 18, dual port RAM module 19 the first communication ends electrically connect with CPU module 11 two-way signaling respectively.
The communication ends of CPU module 11 is the first communication ends of main control unit 1; The second communication end of dual port RAM module 19 is the second communication end of main control unit 1; The button signal input of CPU module 11 is the push button signalling input of main control unit 1; The second communication end of display module 18 is the display signal end of main control unit 1.
The ARM9 microprocessor that core processing device is dominant frequency 200MHz of the CPU module 11 of main control unit 1, its serial port is as the first communication ends of main control unit 1. Flash memory module 12 preferably employs NORFlash flash chip, and it is for storing the information datas such as basic parameter, the testing scheme of configuration, test result form. SDRAM module 13 calls for data storage and acceptance. Clock module 14 provides clock signal for CPU module 11. Network Interface Module 15 preferably employs RJ45 network interface, its can be used for realize and host computer communicate and connect support IEC61850 standard the digitalized electrical energy meter uploading data function call survey together to carry out model measurement and data. Communication interface modules 16 is provided with RS232 and safeguards mouth, is used for equipment is safeguarded. Usb interface module 17 realizes importing and exporting and the access of the equipment such as keyboard, mouse of data for connecing USB flash disk. Display module 18 is used for driving touch display screen and to realize information mutual. One end of dual port RAM module 19 electrically connects with CPU module 11 two-way signaling, the other end of dual port RAM module 19 is the second communication end of main control unit 1, and dual port RAM module 19 is for realizing the communication of the big data quantity between the CPU module 11 of main control unit 1 and high-speed data processing unit 2.
High-speed data processing unit 2 is used for carrying out data process. In the present embodiment, high-speed data processing unit 2 preferably employs the 32 bit DSP chips that model is ADSP-BF518, and dominant frequency is 400MHz.
Network management unit 3 forwards for realizing synchronized transmission and reception from the data message of heterogeneous networks interface and the data of different passage and identifies. Network management unit 3 is provided with ST optical fiber interface 31, SC optical fiber interface 32 and RJ45 interface 33, and wherein, ST optical fiber interface 31 and SC optical fiber interface 32 are respectively provided with 2 respectively; RJ45 interface 33 is provided with 3. By the setting of the various interfaces of NE 3, facilitate in the access verifying on-the-spot and different optical fiber interface and network interface, without the conversion carrying out interface behind verification scene again, time saving and energy saving.
FPGA unit 4, for realizing the coding exporting the input with tested digitalized electrical energy meter pulse and signal capture and signal and the decoding of high-frequency impulse. FPGA unit 4 is provided with high-frequency impulse output interface 41, ammeter pulse input interface 42 and FT3 data-interface 43. Wherein, high-frequency impulse output interface 41 exports the meritorious pulse output in 1 road and the 1 idle pulse in road; When ammeter pulse input interface 42 uses, the meritorious pulse of digitalized electrical energy meter and idle pulse are surveyed in reception; 43 signals of FT3 data-interface are sent into or are sent FPGA and are decoded and coded treatment.
So-called FPGA, refers to field programmable gate array. So-called FT3, refers to the transmission frame format of a kind of link layer, is the IEC60044-8 electronic current mutual inductor standard frame format that specifies to use.
Touch display screen 5 and preferably employ 7 color touch LCDs, the display of its input being used for parameter configuration and relevant information.
Push-button unit 6 is made up of 8 function buttons. The supplementary means touching display screen 5 that functions as of push-button unit 6 realizes parameter configuration and control.
Power Management Unit 7 is for providing corresponding working power for each unit of this device, each module.
(application examples)
The lower-cost calibration device for digital electric energy meter of intelligent substation of previous embodiment 1, carries out the calibrating verification of precision and other function under laboratory and scene reality load for digital quantity inputs electric energy meter.
When laboratory verification, main control unit 1 is by touching display screen 5 or being connected with host computer by the Network Interface Module 15 of main control unit 1, corresponding qualification program is configured according to different demands, such as curent change, power factor change, frequency changes, change in voltage, sampled point changes, packet loss, electric energy precision influence amount is customized by network interruption etc., the scheme prepared is stored in main control unit 1, during test, the scheme of calling in automatically begins to according to the test number of turns, test volumes etc. calculate the high-frequency impulse constant of corresponding power and voltage, electric current, frequency, the information such as angle are dealt into high-speed data processing unit 2(DSP by first communication ends (serial communication interface of CPU module 11) of main control unit 1), the parameter that high-speed data processing unit 2 configures according to main control unit 1, tissue IEC61850-9-1/9-2 or FT3 message, according to sample frequency such as 4k, 12.8k of arranging, transmitted messages by the various optical fiber interfaces (ST optical fiber interface 31, SC optical fiber interface 32, RJ45 interface 33 etc.) of network management unit 3 civilian to tested digitalized electrical energy meter, FPGA unit 4 constantly gathers the pulse signal accessing tested ammeter, high-frequency impulse number under the higher frequency sent according to high-speed data processing unit 2 and test number of turns computational rules pulse number also passes through its data communication end (data/address bus) and returns to high-speed data processing unit 2, high-speed data processing unit 2 calculates according to formula and obtains the error under corresponding test condition and be uploaded to main control unit 1, main control unit 1 control touch display screen 5 carries out corresponding information and shows, and can be uploaded to ipc monitor platform. main control unit 1, after having tested according to the testing scheme set, automatically generates testing journal sheet.
When intelligent substation carries out test under on-the-spot real load condition, main control unit 1 configures the communications parameter of speed data processing unit 2 and Intelligent substation merging unit by touching display screen 5, such as MAC Address, communication protocol, APPID, voltage and current etc. that passage is corresponding, the ammeter pulse input interface (meritorious and idle pulse input port) of FPGA unit 4 is connected with the pulse delivery outlet of digitalized electrical energy meter to be checked; If the unit that merges of intelligent substation has special verification delivery outlet, the ST optical fiber interface 31 or the SC optical fiber interface 32 that are then directly accessed device verify, if the unit that merges of intelligent substation does not have special delivery outlet, many mouthfuls that network management unit 3 has then are utilized to synchronize forwarding capability, the message sent of unit that merges of intelligent substation is synchronized to be dealt into tested electric energy meter and high-speed data processing unit 2 simultaneously, namely need not additionally lay cable and just can conveniently realize scene In-situ test.High-speed data processing unit 2 and tested ammeter obtain the digital signal merging unit of intelligent substation simultaneously, it is simultaneously under identical Real-time and Dynamic load, the pulse of the tested electric energy meter output of FPGA unit 4 dynamic acquisition, rising edge first pulse is caught and to high-speed data processing unit 2 interruption, another rising edge triggered interrupts when predetermined pulse number arrives is to high-speed data processing unit 2, high-speed data processing unit 2 calculates in during this period of time, according to the difference of the two time point, the electricity added up and calculates, by meter constant conversion, the site error obtaining this test point.
Upload the model accordance of the station level agreement using IEC61850-8-1 to test digitalized electrical energy meter simultaneously, the RJ45 interface of tested electric energy meter is connected by the Network Interface Module 15 of main control unit, by the IEC61850 model of MMS reading power meters, thus detecting the function of digitalized electrical energy meter.
In sum, the lower-cost calibration device for digital electric energy meter of intelligent substation of the present invention, adopt the multicore architecture of the processing data information of main control unit, high-speed data processing unit and FPGA unit, guarantee the device detection real-time high-efficiency to digitalized electrical energy meter during for real-time detection check, and accuracy of detection is high; Main control unit is by arranging network interface, convenient with backstage host computer communication during use; USB interface, RS232 communication interface are set, connect peripheral hardware convenient; Network management unit 3 is provided with ST optical fiber interface 31, SC optical fiber interface 32 and RJ45 interface 33, facilitates in the access verifying on-the-spot and different optical fiber interface and network interface, without the conversion carrying out interface behind verification scene again, time saving and energy saving; Meanwhile, the problem that optical fiber and digital signal cannot be concurrently accessed when solving on-the-spot real load calibrating, it is possible to realize the dynamic precision test under real load in tested ammeter locality; By touching the setting of display screen and push-button unit so that operation and control interface is friendly, easy to use; Structure is relatively easy, less costly.
Above example is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique is without departing from the spirit and scope of the present invention; can also making various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into the scope of patent protection of the present invention.
Claims (1)
1. a lower-cost calibration device for digital electric energy meter of intelligent substation, it is characterised in that: include main control unit (1), high-speed data processing unit (2), network management unit (3), FPGA unit (4), touch display screen (5), push-button unit (6) and Power Management Unit (7);
Main control unit (1) is provided with the first communication ends, second communication end, display signal end and push button signalling input; High-speed data processing unit (2) is provided with the first to fifth communication end; Network management unit (3) is provided with data signal communication end and control signal communication ends; FPGA unit (4) is provided with data communication end; Touch display screen (5) and be provided with display signal end; Push-button unit (6) is provided with signal output part;
First communication ends of main control unit (1) electrically connects with the first communication ends two-way signaling of high-speed data processing unit (2); The second communication end of main control unit (1) electrically connects with the second communication end two-way signaling of high-speed data processing unit (2);The display signal end of main control unit (1) electrically connects with the display signal end two-way signaling touching display screen (5); The push button signalling input of main control unit (1) electrically connects with the signal output part signal of push-button unit (6); The third communication end of high-speed data processing unit (2) electrically connects with the data signal communication end two-way signaling of network management unit (3); The fourth communication end of high-speed data processing unit (2) electrically connects with the control signal communication ends two-way signaling of network management unit (3); The fifth communication end of high-speed data processing unit (2) electrically connects with the data communication end two-way signaling of FPGA unit (4); Power Management Unit (7) is used for providing working power;
Described main control unit (1) includes CPU module (11), flash memory module (12), SDRAM module (13), clock module (14), Network Interface Module (15), communication interface modules (16), usb interface module (17), display module (18) and dual port RAM module (19); CPU module (11) is provided with communication ends and button signal input; Display module (18) and dual port RAM module (19) are provided with the first communication ends and second communication end respectively;
The flash memory module (12) of main control unit (1), SDRAM module (13), clock module (14), Network Interface Module (15), communication interface modules (16) and usb interface module (17) electrically connect with CPU module (11) two-way signaling respectively; First communication ends of display module (18), dual port RAM module (19) the first communication ends electrically connect with CPU module (11) two-way signaling respectively;
The communication ends of CPU module (11) is the first communication ends of main control unit (1); The second communication end of dual port RAM module (19) is the second communication end of main control unit (1); The button signal input of CPU module (11) is the push button signalling input of main control unit (1); The second communication end of display module (18) is the display signal end of main control unit (1);
Described FPGA unit (4) is provided with high-frequency impulse output interface (41), ammeter pulse input interface (42) and FT3 data-interface (43).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610057569.0A CN105676162B (en) | 2013-11-22 | 2013-11-22 | Low-cost intelligent substation digital electric energy meter calibration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610057569.0A CN105676162B (en) | 2013-11-22 | 2013-11-22 | Low-cost intelligent substation digital electric energy meter calibration device |
| CN201310595243.XA CN103605105B (en) | 2013-11-22 | 2013-11-22 | Calibration device for digital electric energy meter of intelligent substation |
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| CN201310595243.XA Division CN103605105B (en) | 2013-11-22 | 2013-11-22 | Calibration device for digital electric energy meter of intelligent substation |
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| CN105676162B CN105676162B (en) | 2017-10-17 |
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Address after: 213003 No. 27, West Front Street, Changzhou, Jiangsu Applicant after: STATE GRID CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Applicant after: STATE GRID JIANGSU ELECTRIC POWER Co. Applicant after: State Grid Corporation of China Address before: 213003 Jiangsu province Changzhou City Tianning District Bureau Street No. 27 Applicant before: CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Applicant before: JIANGSU ELECTRIC POWER Co. Applicant before: State Grid Corporation of China |
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Inventor after: Lu Limin Inventor after: Li Ming Inventor after: Zhuang Zhong Inventor after: Gao Xiaolei Inventor before: Zhuang Zhong |
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Address after: No.27, junqian street, Changzhou City, Jiangsu Province, 213000 Patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. CHANGZHOU POWER SUPPLY BRANCH Patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 213003 No. 27, West Front Street, Changzhou, Jiangsu Patentee before: STATE GRID CHANG ZHOU CURRENT SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Patentee before: STATE GRID JIANGSU ELECTRIC POWER Co. Patentee before: State Grid Corporation of China |
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Effective date of registration: 20220509 Address after: No.27, junqian street, Changzhou City, Jiangsu Province, 213000 Patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. CHANGZHOU POWER SUPPLY BRANCH Patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: Changzhou Jintan Jinneng Power Co.,Ltd. Address before: No.27, junqian street, Changzhou City, Jiangsu Province, 213000 Patentee before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. CHANGZHOU POWER SUPPLY BRANCH Patentee before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Patentee before: STATE GRID CORPORATION OF CHINA |