CN205450248U - Balanced whole station test system of digital electric energy measurement of intelligent substation - Google Patents
Balanced whole station test system of digital electric energy measurement of intelligent substation Download PDFInfo
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- CN205450248U CN205450248U CN201620128646.2U CN201620128646U CN205450248U CN 205450248 U CN205450248 U CN 205450248U CN 201620128646 U CN201620128646 U CN 201620128646U CN 205450248 U CN205450248 U CN 205450248U
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Abstract
The embodiment of the utility model discloses balanced whole station test system of digital electric energy measurement of intelligent substation establishs the digital measurement system's of intelligent substation simulation model through the host computer, comes emulation intelligent substation actual motion operating mode, separate the sampling test terminal at the intelligent substation clipping room, will the emulation sample data order that the host computer sent is sent to the smart machine that respectively awaits measuring through main control system, real -time synchronization, realizes whole intelligent substation's area load dry run, receive the MMS electricity energy data that each electric energy meter sent through network switch simultaneously, receive MMS electricity energy data by the host computer at last, carry out real -time analysis, the balanced on -the -spot test of the digital electric energy measurement of realization to whole station electric flux. The test system that this embodiment provided can make to measure and go on after this important test of electric energy balance no longer confines transformer substation's actual motion to, detects the accuracy of transformer substation's measurement on the basis of not destroying the substation operation operating mode.
Description
Technical field
This utility model relates to intelligent substation of electric power system the digitized measurement system emulation and technical field of measurement and test, particularly relates to a kind of intelligent substation digitalized electric energy metering and balances whole station test system.
Background technology
Unique foundation that electric energy metrical is settled accounts as electricity trading, its accuracy and reliability are directly connected to purchase the economic interests of sale of electricity both sides and social equity is just.Along with digital transformer substation and the Rapid Popularization of intelligent substation, the digitized measurement equipment such as electronic mutual inductor, combining unit and digitalized electrical energy meter is widely applied in power system.Due to the synchronization of electronic mutual inductor current/voltage, the configuration of combining unit coefficient, network transmission many reasons such as frame losing error code and digitalized electrical energy meter parameter configuration, make the digitized measurement system that the unbalanced phenomenon of electric energy occur after actual motion in a large number, and limit due to condition after the digitized measurement running, cannot be carried out comprehensively checking so that described electric energy energy imbalance is referred to as the hang-up perplexing intelligent substation metrological personnel.And described electric energy imbalance problem just can only be found after the actual bringing onto load that puts into operation of described the digitized measurement system, this brings great hidden danger to the reliability of intelligent substation the digitized measurement and economy.
Therefore, metering imbalance test before the digitized measurement system puts into operation is necessary, but when carrying out measuring uneven survey, examination is required for multiple intervals ammeter and arranges all required Multi-path synchronous derived digital signals, and does not has this class professional equipment targetedly at present；Additionally, the most quick communication mode reliably of the electric energy value of electric energy meter is sent, it is impossible to form quick closed loop test.
Utility model content
This utility model embodiment provides a kind of intelligent substation digitalized electric energy metering and balances whole station test system, to provide a kind of sampled data real-time simulation measuring technology and to support that the electric flux of digitalized electrical energy meter reads, solve the digitized measurement system problem of whole station electric energy balance test before intelligent substation puts into operation.
In order to solve above-mentioned technical problem, this utility model embodiment discloses following technical scheme:
Provide a kind of intelligent substation digitalized electric energy metering and balance whole station test system, including host computer, control main frame, test terminal and the network switch, wherein:
Described host computer, for utilizing mathematics library software to set up the phantom of intelligent substation the digitized measurement system, fault object and sequential according to setting determine dynamic simulation process, MMS model file in combination with modeling and simulating carries out analytical analysis to MMS electric energy information data, wherein, described MMS electric energy information data are sent by digitalized electrical energy meter in intelligent substation；
Described control main frame, communicate to connect with described host computer, each interval sampling data command described sampled data order is sent to the described test terminal of correspondence in receiving the intelligent substation that described host computer modeling and simulating calculates, control when being additionally operable to carry out with described test terminal Tong Bus pair；
Described test terminal, is connected with described control main-machine communication, is used for according to described sampled data order and corresponding rear end smart machine type, sends the sampling of dummy acquisition device or 9-2 sampling to described rear end smart machine under unified time domain；
Digitalized electrical energy meter communication connection in the described network switch, with described intelligent substation, for receiving the described MMS electric energy data that described digitalized electrical energy meter produces, and is sent to described host computer by described MMS electric energy data by described control main frame.
Preferably, described control main frame includes the dual processors that first microprocessor and a FPGA (FieldProgrammableGateArray field programmable gate array) chip combine, wherein:
Described first microprocessor, for controlling with described host computer data interaction and algorithm controls and data interactive controlling when Tong Bu pair with described test terminal；
Described first fpga chip, synchronizes for described control main frame internal clocking and the disconnected frequency dividing of Data processing.
Preferably, described test terminal includes the dual processors that the second microprocessor and the second fpga chip combine, wherein:
Described second microprocessor, controls for the data interaction with described control main frame, and signal when processing the synchronization pair of described control main frame transmission；
Described second fpga chip, for the sampling of described dummy acquisition device or 9-2 sampling be transmitted coding-control, and controls the timeticks of sampling apparatus in described test terminal.
Preferably, being provided with constant-temperature crystal oscillator in described test terminal, when between described test terminal with described control main frame Tong Bu pair after signal interruption, the synchronization that realizes described test terminal and described control main frame keeps time.
Preferably, described first microprocessor includes MPC8247 embedded microprocessor.
Preferably, described second microprocessor includes MPC8247 embedded microprocessor.
From above technical scheme, a kind of intelligent substation digitalized electric energy metering that this utility model embodiment provides balances whole station test system, set up the phantom of intelligent substation the digitized measurement system by host computer, carry out artificial intelligence transformer station actual operating mode；In intelligent substation installation interval sampling test terminal, the emulation sampled data order sent by described host computer is by controlling main frame, real-time synchronization transmission to each smart machine to be measured, it is achieved the on-load dry run of whole intelligent substation；Receive, by the network switch, the MMS electric energy data that each electric energy meter sends simultaneously, finally received described MMS energy data by described host computer, whole station electric flux is analyzed in real time, it is achieved the on-the-spot test of digitalized electric energy gauge amount balance.The method of testing that this utility model is implemented to provide has versatility, this the important test job of metering electric energy balance can be made to carry out after being no longer limited to transformer station's actual motion, the accuracy of transformer station's metering can be detected on the basis of not destroying substation operation operating mode, improve the safety and reliability of intelligent grid measuring equipment, guaranteeing the justice of electric energy trade, just, also the safe and stable operation for electrical network provides safeguard.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, for those of ordinary skills, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
A kind of intelligent substation digitalized electric energy metering that Fig. 1 provides for this utility model embodiment balances whole station test system structure schematic diagram；
Fig. 2 balances the schematic flow sheet of whole station method of testing for a kind of intelligent substation digitalized electric energy metering that this utility model embodiment provides；
Described control main frame that Fig. 3 provides for this utility model embodiment concrete with described test terminal pair time process flow schematic diagram；
The described test terminal that Fig. 4 provides for this utility model embodiment locks the schematic flow sheet according to master clock correction its temporal.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of this utility model protection.
Seeing Fig. 1, a kind of intelligent substation digitalized electric energy metering provided for this utility model embodiment balances whole station test system structure schematic diagram, and described test system includes host computer, controls main frame, test terminal and the network switch.
Described host computer, for utilizing mathematics library software to set up the phantom of intelligent substation the digitized measurement system, fault object and sequential according to setting determine dynamic simulation process, MMS model file in combination with modeling and simulating carries out analytical analysis to MMS electric energy information data, wherein, described MMS electric energy information data are sent by digitalized electrical energy meter in intelligent substation.
Concrete, described host computer, based on industrial computer platform, uses mathematics library software to set up the phantom of intelligent substation the digitized measurement system；Then, component parameters and state timing variations according to the fault object set determine simulation process, complete transformer station's time-domain-simulation and sampling output controls.
Further, also by software, component parameters each in intelligent substation digitized is modeled, changed by the various running statuses arranging and simulating power system, voltage that in real time output is digital, current sample information, realize transformer station's whole station simulation calculation functions such as electrical operation simulation, system performance simulation.
Described control main frame, communicates to connect with described host computer, for receive described host computer modeling and simulating calculate intelligent substation in each interval sampling data command and described sampled data order is sent to correspondence described test terminal.
Described control main frame includes the dual-CPU system that first microprocessor and the first fpga chip combine, and realizes data process and separates with communication.
Wherein, described first microprocessor, for controlling with described host computer data interaction and the function such as algorithm controls and data interactive controlling when Tong Bu pair with described test terminal, described first microprocessor can use the MPC8247 embedded microprocessor of Freescale company, this processor belongs to PowerQUICCII series, comprise a kernel based on PowerPCMPC603e and a communication process kernel CPM, be certainly not limited to described model.
Described first fpga chip, synchronize for described control main frame internal clocking and the disconnected frequency dividing of Data processing, described first fpga chip can use the Spartan3 series of products XC3S1800 of Xilinx, mainly completes internal clocking and synchronizes, is certainly not limited to described model.
Further, described control main frame the most also to complete work when synchronization with each test terminal pair, for ensureing that all test terminals are in unified clock Synchronization Control state, control described in the present embodiment main frame use meet IEEE1588 specification pair time mode, provide unified master-slave synchronisation clock signal for described test terminal.Precision during for obtaining preferable pair, described control main frame receives external clock reference or is produced standard time clock by internal High Precision Crystal Oscillator, using multicast mode, parallel and mutual 1588 clock informations in each described test terminal.
Described test terminal, is connected with described control main-machine communication, is used for according to described sampled data order and corresponding rear end smart machine type, sends the sampling of dummy acquisition device or 9-2 sampling to described rear end smart machine under unified time domain.
Concrete, if rear end smart machine accesses as voltage combining unit, then the voltage sample data of the corresponding harvester agreement of output；If rear end smart machine accesses as interval combining unit, the then current sampling data of the corresponding harvester agreement of output；If it is electric energy meter that rear end smart machine accesses, then directly output comprises the 9-2 sampled data of current and voltage signals.
Described test terminal includes the dual processors that the second microprocessor and the second fpga chip combine, and realizes data process and separates with communication.
Wherein, described second microprocessor, control for the data interaction with described control main frame, and signal when processing the synchronization pair of described control main frame transmission.Described second microprocessor can use the MPC8247 embedded microprocessor of Freescale company, is certainly not limited to described model.
Described second fpga chip, for the sampling of described dummy acquisition device or 9-2 sampling be transmitted coding-control, and controls the timeticks of sampling apparatus in described test terminal.
When, after described test system electrification, described second fpga chip presses setpoint frequency management sampling clock, after when the synchronization pair that described control main frame sends, signal inputs and be effective, is then adjusted sample clock frequency by internal software algorithm；When outer synchronous signal is abnormal or disappears, then combined by the High Precision Crystal Oscillator within described test terminal and software algorithm, maintain stability and the accuracy of sampling clock.After each Sampling interrupt arrives, described second fpga chip carries out coding-control to all kinds of sampled datas, parallel starts to send the sampling of various harvester and Ethernet is sampled.Simultaneously, described second fpga chip is to internal RAM (randomaccessmemory, random access memory) use twoport ping-pong operation, under the same time, data write operates the different subregions of RAM from data read-out, preventing reading and writing data conflict from causing system crash, safe and reliable is transmitted virtual sampled data.
Digitalized electrical energy meter communication connection in the described network switch, with described intelligent substation, for receiving the described MMS electric energy data that described digitalized electrical energy meter produces, and is sent to described host computer by described MMS electric energy data by described control main frame.
Based on above-mentioned test system, as in figure 2 it is shown, the metering of a kind of intelligent substation digitalized electric energy of what this utility model embodiment also provided for balances whole station method of testing, described method of testing specifically includes following steps.
S110: host computer sets up the phantom of intelligent substation the digitized measurement system.
Concrete, host computer uses the intelligent substation phantom that mathematics library software is set up, the present embodiment uses the real-time simulation of whole station model, build the moving model of actual transformer station, simulate the actual bringing onto load situation at the postrun each interval of intelligent substation, electric network composition and component parameters can be modeled by user by graphic interface, can arbitrarily arrange and simulate the various operating conditions of power system, produce digitized voltage, the virtual sampled data of electric current in real time.
Meanwhile, described host computer uses graphic interface, can directly be directly displayed on transformer station model by electric flux signal so that tester directly can calculate the electric energy balance of links.
S120: described host computer is according to the fault object set and sequential, each interval sampling data command in controlling main frame transmission intelligent substation.
Concrete, host computer, according to setting component parameters and the state timing variations of fault object, determines concrete simulation process, and to controlling the sampled data order at each interval in main frame sends intelligent substation.
S130: described control main frame receives described sampled data order, and described sampled data order is sent to corresponding test terminal.
Concrete, described control main frame receives described sampled data order, after resolving described sampled data order, according to the test terminal information labels of described sampled data order, described sampled data order is sent to corresponding test terminal.
Further, described host computer and described control main frame use TCP/IP internal agreement to carry out data interaction.
Signal when S130: described control main frame sends synchronization pair to described test terminal, when carrying out Tong Bu pair with described test terminal.
In order to ensure that all of described test terminal is in unified clock Synchronization Control state, in the present embodiment, described control main frame use meet IEEE1588 specification pair time mode, provide unified master-slave synchronisation clock signal for described test terminal.
TCP/IP internal agreement communication it is also adopted by between described test terminal and described control main frame, after described test terminal brings into operation, timing by communication network monitor described control main frame transmission pair time message, when being automatically performed Tong Bu pair of the Ethernet with described control main frame.The present embodiment, uses 1588 simultaneous techniquess as the synchronizing signal of data source, it is achieved the synchronization accuracy between multi-compartment is better than 1us.
Due to mode when IEEE1588 synchronised clock standard uses message pair, message is higher at the process time jitter retardation ratio spent through microprocessor and operating system, IEEE1588 clock correction can be adversely affected by this, therefore, the present embodiment directly most descends two-layer to process message at ICP/IP protocol level, precision when obtaining preferable pair.
Wherein, described control main frame concrete with described test terminal pair time process include:
S210: described control main frame receives external clock reference or is produced standard clock signal by internal High Precision Crystal Oscillator.
S220: according to described standard clock signal, described control main frame passes through multicast mode, parallel signal when the transmission described synchronization pair of described test terminal.
Signal when S230: described test terminal receives described synchronization pair, detect and judge signal during described synchronization pair be whether effectively to synchronize pair time signal.
Due in the signals transmission when described synchronization pair, may be disturbed by other, cause distorted signals, so this utility model is implemented to add to the detection process of signal during the synchronization pair received, concrete, the detection of signal during described synchronization pair is included the quality testing of the aspects such as effective pulsewidth, shake and frequency.
S240: when signal is effectively synchronization pair when described synchronization pair during signal, when described test terminal judges described effective synchronization pair, whether the continuous number of signal reaches to set threshold value.
Wherein, it can also be multiple that the number of described setting threshold value can be one, is not specifically limited in the present embodiment.
S250: when the continuous number of signal reaches to set threshold value when described effective synchronization pair, described test terminal locks self clock frequency and enters master clock follow the mode.
Wherein: described test terminal locks self clock frequency and enters master clock follow the mode, specifically includes:
S310: set the master clock of described control main frame and described test terminal has symmetry from clock network time delay, calculates described master clock to the described network delay Delay from clock.
Set from the network delay between clock and master clock, there is symmetry, i.e. the network delay from clock to master clock with master clock to equal from the network delay of clock；
According to the symmetry of described network delay, calculate described master clock to the described network delay Delay from clock,
That is,
In formula (1), the accurate transmission time of signal when Tm1 is described synchronization pair, it be included in described synchronization to time signal follow in message；The reception time of signal when Ts1 is described synchronization pair；Ts2 is the transmission time of delay-request message；The reception time of Tm2 delay-request message, it is included in delay-response message.
S320: according to described network delay Delay, calculates described from time deviation Offset between clock and described master clock,
That is, Offset=Ts1-Tm1-Delay (2)
S330: judge that whether described time deviation Offset is more than or equal to Preset Time deviation.
Wherein, in the present embodiment, described time deviation can be set to 10um, is certainly not limited to described numerical value.
When S340: described time deviation Offset is more than or equal to Preset Time deviation, then according to described time deviation Offset being modified from clock time described test terminal.
From the principle of IEEE1588 agreement, the time difference between clock of master clock and described test terminal for making described control main frame enters delicate rank, it is necessary to carry out repeatedly master-slave synchronisation process.
S350: when described time deviation Offset is less than Preset Time deviation, then latch the current corrected time, and continue punctual with the constant-temperature crystal oscillator in described test terminal.
Further, in test process, signal when described test terminal further determines whether to receive described synchronization pair in setting time interval；Signal when if described test terminal does not receives described synchronization pair in setting time interval; during the most described synchronization pair, signal exists abnormal or after losing, then by the constant-temperature crystal oscillator in described test terminal and software algorithm, keep synchronization with described main control computer punctual.
The present embodiment, due to use High Accuracy Constant Temperature crystal oscillator frequency locking technology, even if coordinate software frequency locking technology pair time invalid in the case of also can guarantee that whole station signal ground synchronization accuracy.
S140: described test terminal receives described sampled data order, according to the pre-configured and rear end smart machine type in described sampled data order, sends the sampling of dummy acquisition device or 9-2 sampling to described rear end smart machine；
Wherein, if rear end smart machine accesses as voltage combining unit, then the voltage sample data of the corresponding harvester agreement of output；If rear end smart machine accesses as interval combining unit, the then current sampling data of the corresponding harvester agreement of output；If it is electric energy meter that rear end smart machine accesses, then directly output comprises the 9-2 sampled data of current and voltage signals.
S150: the MMS electric energy data produced by digitalized electrical energy meter in network switch reception intelligent substation, and described MMS electric energy data is sent to described control main frame, described digitalized electrical energy meter electrically connects with described test terminal or described rear end smart machine.
Wherein, when in intelligent substation, some directly exports 61850-9-2 agreement when being spaced and do not have electronic mutual inductor.In the present embodiment, use the output of artificial electronic formula transformer proprietary protocol, combining unit is brought in the middle of the digitized measurement whole station test system, do not change the network condition at scene, meanwhile, original secondary circuit at whole station is not changed, so not limited by site-models.
S160: described control main frame receive described MMS electric energy data, and described MMS electric energy data is filtered process after be sent to described host computer.
Certainly, described MMS electric energy data can also be sent directly to described host computer.The present embodiment uses control main frame that described MMS electric energy data is carried out pretreatment, can effectively reduce the data processing pressure of described host computer, improve data operation speed.
S170: described host computer reception process after MMS energy data and be digitized the whole station equilibrium analysis of electric energy metrical.
Concrete, described host computer combines the MMS model file of modeling and simulating, automatically resolves the MMS energy data after processing, obtains the electric flux due in of each electric energy information；According to described electric flux due in, carry out the electric flux of different interval in described intelligent substation synchronizing interpolation calculation；Under identical time domain, by recalling the projectional technique of formula, whole station electric flux is compared, complete the whole station balance test of digitalized electric energy metering.
Intelligent substation digitalized electric energy based on the sampled data real-time simulation metering that this utility model embodiment provides balances whole station test system and method for testing, by installing transient state sampling apparatus at the scene, use the technology that whole station multi-compartment emulates simultaneously, emulate the ruuning situation that whole load on transformer substation is later, by the proprietary protocol of electronic mutual inductor, sample values is sent in real time combining unit, again by the electric energy value in the MMS signal at each interval of reading back, form the closed loop test of electric energy balance, sent by sampled data real-time simulation simultaneously and solve Multi-path synchronous digital signal source problem, thus realize the electric energy balance test job before intelligent substation puts into operation.
It should be noted that, in this article, the such as relational terms of " first " and " second " or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply relation or the order that there is any this reality between these entities or operation.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
The above is only detailed description of the invention of the present utility model, makes to skilled artisans appreciate that or realize this utility model.Multiple amendment to these embodiments will be apparent to one skilled in the art, and generic principles defined herein can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (6)
1. an intelligent substation digitalized electric energy metering balances whole station test system, it is characterised in that includes host computer, control main frame, test terminal and the network switch, wherein:
Described host computer, for utilizing mathematics library software to set up the phantom of intelligent substation the digitized measurement system, fault object and sequential according to setting determine dynamic simulation process, MMS model file in combination with modeling and simulating carries out analytical analysis to MMS electric energy information data, wherein, described MMS electric energy information data are sent by digitalized electrical energy meter in intelligent substation；
Described control main frame, communicate to connect with described host computer, each interval sampling data command described sampled data order is sent to the described test terminal of correspondence in receiving the intelligent substation that described host computer modeling and simulating calculates, control when being additionally operable to carry out with described test terminal Tong Bus pair；
Described test terminal, is connected with described control main-machine communication, is used for according to described sampled data order and corresponding rear end smart machine type, sends the sampling of dummy acquisition device or 9-2 sampling to described rear end smart machine under unified time domain；
Digitalized electrical energy meter communication connection in the described network switch, with described intelligent substation, for receiving the described MMS electric energy data that described digitalized electrical energy meter produces, and is sent to described host computer by described MMS electric energy data by described control main frame.
Intelligent substation digitalized electric energy the most according to claim 1 metering balances whole station test system, it is characterised in that described control main frame includes the dual processors that first microprocessor and the first fpga chip combine, wherein:
Described first microprocessor, for controlling with described host computer data interaction and algorithm controls and data interactive controlling when Tong Bu pair with described test terminal；
Described first fpga chip, synchronizes for described control main frame internal clocking and the disconnected frequency dividing of Data processing.
Intelligent substation digitalized electric energy the most according to claim 1 and 2 metering balances whole station test system, it is characterised in that described test terminal includes the dual processors that the second microprocessor and the second fpga chip combine, wherein:
Described second microprocessor, controls for the data interaction with described control main frame, and signal when processing the synchronization pair of described control main frame transmission；
Described second fpga chip, for the sampling of described dummy acquisition device or 9-2 sampling be transmitted coding-control, and controls the timeticks of sampling apparatus in described test terminal.
Intelligent substation digitalized electric energy the most according to claim 3 metering balances whole station test system, it is characterized in that, being provided with constant-temperature crystal oscillator in described test terminal, when between described test terminal with described control main frame Tong Bu pair after signal interruption, the synchronization that realizes described test terminal and described control main frame keeps time.
Intelligent substation digitalized electric energy the most according to claim 2 metering balances whole station test system, it is characterised in that described first microprocessor includes MPC8247 embedded microprocessor.
Intelligent substation digitalized electric energy the most according to claim 3 metering balances whole station test system, it is characterised in that described second microprocessor includes MPC8247 embedded microprocessor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510869A (en) * | 2016-02-19 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Whole station testing system and method of digital electric energy metering balance of intelligent transformer substation |
| CN112333119A (en) * | 2020-11-27 | 2021-02-05 | 深圳华云信息系统有限公司 | Data transmission system and method |
| CN114217262A (en) * | 2021-12-16 | 2022-03-22 | 烟台东方威思顿电气有限公司 | Electric energy meter automatic testing method based on paravirtualization |
-
2016
- 2016-02-19 CN CN201620128646.2U patent/CN205450248U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510869A (en) * | 2016-02-19 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Whole station testing system and method of digital electric energy metering balance of intelligent transformer substation |
| CN105510869B (en) * | 2016-02-19 | 2018-03-27 | 云南电网有限责任公司电力科学研究院 | A kind of whole test system and method for standing of intelligent substation digitalized electric energy metering balance |
| CN112333119A (en) * | 2020-11-27 | 2021-02-05 | 深圳华云信息系统有限公司 | Data transmission system and method |
| CN114217262A (en) * | 2021-12-16 | 2022-03-22 | 烟台东方威思顿电气有限公司 | Electric energy meter automatic testing method based on paravirtualization |
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