CN205861836U - The voltage dip synchronous monitoring system of multistage power grid - Google Patents
The voltage dip synchronous monitoring system of multistage power grid Download PDFInfo
- Publication number
- CN205861836U CN205861836U CN201620866378.4U CN201620866378U CN205861836U CN 205861836 U CN205861836 U CN 205861836U CN 201620866378 U CN201620866378 U CN 201620866378U CN 205861836 U CN205861836 U CN 205861836U
- Authority
- CN
- China
- Prior art keywords
- resistance
- voltage
- voltage dip
- synchronous monitoring
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses the voltage dip synchronous monitoring system of a kind of multistage power grid, including the voltage dip synchronous monitoring device being located at each electric pressure bus nodes of each transmission line circuit and the host computer being connected with each voltage dip synchronous monitoring device communication, described voltage dip synchronous monitoring device includes the signal acquisition module that three the first current transformer electricity gathering in cabinet with voltage x current and three voltage transformers all electrically connect, the signal processor electrically connected with described signal acquisition module, the gps clock module that electrically connects with described signal processor and for the first communication module being connected with upper machine communication.The voltage dip synchronous monitoring system of above-mentioned multistage power grid, the quality of power supply information of each electric pressure bus nodes can be monitored in real time, be uploaded to host computer in real time, when occur voltage dip time can be real-time this signal is transferred to host computer, it is simple to host computer carries out follow-up analysis and evaluation.
Description
Technical field
This utility model relates to electric energy quality monitoring field, particularly to the voltage dip synchronous monitoring of a kind of multistage power grid
System.
Background technology
Along with fast developments such as the construction of intelligent grid, power system capacity, scale, electric pressures, the complexity of system, various
Property, user's production efficiency and equipment sensitivity strengthen.Load configuration, electrical characteristic etc. there occurs fundamental change, are based especially on
The renewable energy system of the technology such as microelectronics, computer, power electronics, subscriber equipment are more and more with industrial process etc.
Ground accesses electrical network, and these equipment are very sensitive to voltage dip so that voltage dip becomes the most serious power quality problem.Separately
On the one hand, even if the fault of hundreds of kilometer is likely to cause local voltage dip, the frequency that voltage dip occurs is significantly larger than it
Its power quality problem, according to the relevant investigation display of European and American developed countries' power department, throws the user caused by the quality of power supply
In telling, voltage dip the complaint caused is more than 70%.Therefore design one has structure design modularity, data acquisition calculates
Monitoring system drops in the highest, the synchronizing voltage of communication temporarily, the analysis and evaluation to voltage dip, voltage dip transmission rule
The major accident that the excavation of rule and prevention voltage dip cause is the most significant.
Voltage dip is evaluated and all be unable to do without the monitoring of the quality of power supply with administering, at present, the external quality of power supply well-known
The LEM company of such as Switzerland of company, the UNIPOWER company of Sweden, the FLUKE company of the U.S., domestic species abundance in Baosteel in Shanghai peace is big
Quality of power supply company limited, Electric Applicance Co., Ltd of Guo electricity Zhong section etc., the research and development to electric energy quality monitoring system are the most ripe, merit
Can fairly perfect at present, but all there is following limitation to the monitoring of voltage dip in the various electric energy quality monitoring products on market
Property: 1) focus primarily upon Steady State Power Quality, the monitoring system designed for dynamic power quality voltage dip is extremely
Rare；2) due to voltage dip, there is transitivity, need to carry out the synchronous monitoring of each node, and the monitoring time of product on market
Precision is low, can not meet analysis and evaluation requirement.3) data of multistage power grid voltage dip monitoring are processed, the most targetedly
Assessment system；4) means of communication is single, is unfavorable for realizing the systematization of power network monitoring at different levels.
Therefore, although have been developed for multi-functional quality of power supply automatic monitoring product both at home and abroad, but there is no for multistage
The synchronous monitoring of Problem of Voltage Temporary-Drop in electrical network, for having become the voltage dip of the most serious power quality problem at present, having must
The synchronous monitoring system of voltage dip in multistage power grid to be set up.
Utility model content
For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is: offer one can be real
The voltage dip synchronous monitoring system of the multistage power grid of existing multistage power grid voltage dip synchronous monitoring.
For solving above-mentioned technical problem, this utility model adopts the technical scheme that: provide the voltage of a kind of multistage power grid
Drop synchronous monitoring system temporarily, synchronize prison including the voltage dip being located at each electric pressure bus nodes of each transmission line circuit
Surveying device and the host computer being connected with each voltage dip synchronous monitoring device communication, described voltage dip synchronous monitoring fills
Put the electrical connection that includes all electrically connecting with the secondary side of three the first current transformers on bus and three voltage transformers
The GPS that the signal processor that signal acquisition module electrically connects with described signal acquisition module electrically connects with described signal processor
Clock module and for the first communication module of being connected with upper machine communication.
As optimization, described signal acquisition module includes and described three voltage transformers and three the first current transformers
The signal condition mould that electrically connects with described voltage x current transmitting module of the voltage x current transmitting module that all electrically connects of secondary side
A/D modular converter that block electrically connects with described Signal-regulated kinase and with described A/D modular converter and Signal-regulated kinase
The phaselocked loop all electrically connected.
As optimization, described voltage x current transmitting module includes and the secondary side one_to_one corresponding of described three voltage transformers
Three the voltage transmission circuit electrically connected and electrically connect with described three the first Current Transformer Secondary side one_to_one corresponding three
Individual electric current transmission circuit；
Each voltage transmission circuit all includes the first to the 8th resistance and the first electric capacity, the first end of the first resistance with
Corresponding voltage transformer electrical connection, the second end passes sequentially through ground connection after the second resistance, the 3rd resistance and the 4th resistance, and described the
One electric capacity is connected with described 4th resistor coupled in parallel, and the node between the first electric capacity and described 4th resistance is adjusted with described signal
Reason module electrical connection；Node between described second resistance and described 3rd resistance also pass sequentially through the 5th resistance, the 6th resistance,
It is connected with the node between described 3rd resistance and the 4th resistance after 7th resistance and the 8th resistance；
Each electric current transmission circuit all includes one second current transformer, the 9th resistance, the tenth resistance, described electric current pick-up
Circuit is electrically connected with the first corresponding Current Transformer Secondary side by the primary side of this second current transformer, described second electricity
The secondary side of current transformer has two pins, and first pin electrically connects with described Signal-regulated kinase, also passes sequentially through institute
Stating ground connection after the 9th resistance and the tenth resistance, second pin is directly grounded.
As optimization, described Signal-regulated kinase includes with three voltage transmission circuit and three electric current transmission circuits one by one
Six corresponding signal conditioning circuits, each signal conditioning circuit all include operational amplifier, the 11st to the 14th resistance with
And second electric capacity, the in-phase input end of described operational amplifier is connected with corresponding transmission circuit by described 11st resistance,
The inverting input of described operational amplifier passes through the 12nd resistance eutral grounding, directly the most direct with outfan by the 13rd resistance
Be connected, described outfan also pass sequentially through the 14th resistance and the second capacity earth, described 14th resistance and the second electric capacity it
Between node electrically connect with described A/D modular converter.
As optimization, described phaselocked loop uses general integrated phase lock, and model is CD4046.
As optimization, described host computer has the second communication module being connected with described first communication module communication.
The voltage dip synchronous monitoring system of multistage power grid of the present utility model, equal at each electric pressure bus nodes
One voltage dip synchronous monitoring device is set, and each voltage dip synchronous monitoring device is all with described upper machine communication even
Connecing, described voltage dip synchronous monitoring device, for the quality of power supply information of the every first nodes of monitoring in real time, is uploaded in real time
Position machine, when occur voltage dip time can be real-time this signal is transferred to host computer, it is simple to host computer carries out follow-up analysis
Assessment.Each voltage dip synchronous monitoring device is provided with gps clock module, it is possible under each electric pressure of effective guarantee
Monitoring device has high time precision to the monitoring of voltage dip start/stop time, and its time precision can reach microsecond, with
Make each monitoring device synchronous monitoring to same voltage sag source, within relative time precision can reach 10 microseconds.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of voltage dip synchronous monitoring system one embodiment of this utility model multistage power grid.
Fig. 2 be this utility model multistage power grid voltage dip synchronous monitoring system in voltage dip synchronous monitoring device
Block diagram.
Fig. 3 is the circuit theory diagrams of one of them voltage transmission circuit in voltage x current transmitting module in Fig. 2.
Fig. 4 is the circuit theory diagrams of one of them electric current transmission circuit in voltage x current transmitting module in Fig. 2.
Fig. 5 is the circuit theory diagrams of one of them signal conditioning circuit in Signal-regulated kinase in Fig. 2.
Fig. 6 is the circuit diagram of A/D modular converter in Fig. 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Referring to Fig. 1 to Fig. 6, the voltage dip synchronous monitoring system of multistage power grid of the present utility model includes being located at each
(in this example, some voltage dips are same for voltage dip synchronous monitoring device at each electric pressure bus nodes of transmission line circuit
Step monitoring device is located at the voltage x current at each electric pressure bus nodes one to one and is gathered in cabinet, and this voltage x current is adopted
In collection cabinet may be collectively referred to herein as measuring) and the host computer that is connected with each voltage dip synchronous monitoring device communication, described electricity
Pressure fall synchronous monitoring device temporarily includes the most electric with three the first current transformers on bus and three voltage transformer secondary sides
The signal processor that the signal acquisition module connected electrically connects with described signal acquisition module is electrically connected with described signal processor
The gps clock module that connects and for the first communication module being connected with upper machine communication.
Voltage dip synchronous monitoring device is installed in the measurement cabinet that each bus nodes of multistage power grid is corresponding that (each is female
Voltage and current measurement cabinet it is equipped with at line node), receive each Real-time Collection bus-bar potential transformer secondary side signal and the first electricity
Current transformer secondary side signal, the system time of each device is calibrated by a unified GPS clock signal.Specifically
, a bus has three voltage transformers and three the first current transformers, and each voltage dip synchronous monitoring device
Then all electrically connect with six transformers (three voltage transformers and three the first current transformers) secondary side of corresponding bus.Electricity
Pressure temporarily fall synchronous monitoring by various types of communication network by the software being gathered the real-time incoming host computer of electrical energy parameter of calculating, and
The display on the spot of each electrical quantity can be realized.
Specifically, the described signal acquisition module in the present embodiment includes that the voltage x current electrically connected with six transformers becomes
The Signal-regulated kinase sending module to electrically connect with described voltage x current transmitting module electrically connects with described Signal-regulated kinase
A/D modular converter and the phaselocked loop all electrically connected with described A/D modular converter and Signal-regulated kinase.Described signals collecting mould
Block gathers A, B, C three-phase current and A, B, C phase voltage simultaneously.
Voltage x current transmitting module is that voltage, current signal are converted into applicable A/ with the comprehensive function of Signal-regulated kinase
The voltage signal of D sampling；The effect of A/D modular converter is to convert analog signals into digital signal, and phaselocked loop effect is to realize
Phase locked automatically control, it is ensured that A/D conversion chip can gather data according to the actual frequency of electrical network.Wherein:
Described voltage x current transmitting module includes three voltages electrically connected with described three voltage transformer one_to_one corresponding
Transmission circuit and three the electric current transmission circuits electrically connected with described three the first current transformer one_to_one corresponding.Three voltages
The structure of transmission circuit is identical, and input electrically connects with three voltage transformers respectively, and outfan is electrically connected with Signal-regulated kinase
Connect.Same, the circuit structure of three current transducers is the most identical, and its input is electrically connected with three the first current transformers respectively
Connecing, outfan electrically connects with Signal-regulated kinase.One of them voltage transmission circuit described in detail below and one of them electric current
The structure of transmission circuit.
Referring to Fig. 3, voltage transmission circuit includes the first to the 8th resistance and the first electric capacity C8, the first of the first resistance R3
Holding and the electrical connection of corresponding described voltage transformer, the second end passes sequentially through the second resistance R4, the 3rd resistance 45 and the 4th resistance
Ground connection after R12, described first electric capacity C8 is connected in parallel with described 4th resistance R12, and the first electric capacity C8 is electric with the described 4th
Node between resistance R12 electrically connects with described Signal-regulated kinase；Between described second resistance R4 and described 3rd resistance R5
Node is electric with the described 3rd after also passing sequentially through the 5th resistance R10, the 6th resistance R14, the 7th resistance R16 and the 8th resistance R17
Node between resistance R5 and the 4th resistance R12 connects.
Please refer to Fig. 4, described electric current transmission circuit includes one second Current Transmit the 1, the 9th resistance R39, the tenth electricity
Resistance R44, described electric current transmission circuit is electrically connected by the secondary side of this second current transformer with the first corresponding current transformer
Connecing, described second current transformer has two pins, and first pin electrically connects with described Signal-regulated kinase, leads to the most successively
Crossing ground connection after described 9th resistance R39 and the tenth resistance R44, second pin is directly grounded.
Described Signal-regulated kinase includes and three voltage transmission circuit and three electric current transmission circuits one to one six
Individual signal conditioning circuit.The structure of six signal conditioning circuits is identical, and unique difference is that each signal conditioning circuit is with right
Transmission circuit electrical connection (voltage transmission circuit or electric current transmission circuit) answered, below with one of them signal conditioning circuit
As a example by be described:
Described signal conditioning circuit includes operational amplifier U3B, the 11st to the 14th resistance and the second electric capacity C28,
The in-phase input end of described operational amplifier U3B is connected with corresponding transmission circuit by described 11st resistance R58, the most directly
Even 5V power supply, the inverting input of described operational amplifier U3B passes through the 12nd resistance R60 ground connection, and described inverting input is also
Directly connecing-5V power supply, be also directly joined directly together with outfan by the 13rd resistance R61, described outfan also passes sequentially through the
14 electricity R59 resistance and the second electric capacity C28 ground connection, the node between described 14th resistance R59 and the second electric capacity C28 and described A/
D modular converter electrically connects.
Described A/D modular converter uses model to be the chip of AD7606BSTZ-6, and A/D sampling is the core of signal acquisition module
Electrocardio road, all power network signals just can will be delivered at the DSP digital signal of signal processor after A/D modular converter is changed
Reason module calculate and process, the present embodiment uses 6 Channel Synchronous sampling A/D chip AD7606BSTZ-6, gather simultaneously A,
B, C three-phase current and A, B, C phase voltage.AD7606BSTZ-6 be built-in with simulation input clamping protection, second order frequency overlapped-resistable filter,
Follow the tracks of hold amplifier, 16 Charge scaling SAR ADC, flexibly digital filter, 2.5V reference voltage source, base
Quasi-voltage buffer and high speed serialization and parallel second current transformer.AD7606BSTZ-6 uses 5V single supply to power, permissible
Process ± 10V and the ± true bipolar input signal of 5V, the most all passages all can be sampled with the throughput rate of up to 200 kSPS.
Input clamp protection circuits can tolerate up to ± the voltage of 16.5V.No matter with which kind of sample frequency work, the mould of AD7606
Intend input impedance and be 1M Ω.It uses single supply working method, has filtering and high input impedance in sheet.
Described phaselocked loop uses versatility integrated phase lock CD4046, and it is the multifunctional single being made up of CMOS circuit
Sheet integrated phase lock, has the advantages such as low-power consumption, input impedance height, supply voltage wide ranges, in signal processing and digital display circuit
In be widely used.CD4046 phaselocked loop uses RC type voltage controlled oscillator, it is necessary to external capacitor and resistance conduct
Discharge and recharge element.CD4046 internal cable amplifier and shaping circuit, can be by the small-signal of about the 100Mmv of input
Become square wave or pulse signal.
Described signal processor include the DSP digital signal processing module that electrically connects with described A/D modular converter and with
The ARM engineering module of described DSP digital signal processing module electrical connection.Wherein:
In the present embodiment, described digital signal processing module uses the STM32F429 cake core of band DSP core,
Mainly as calculate every power quality parameter platform, its with FPU 32 Cortex-M4 CPU of ARM, deposit at Flash
Realize the real-time accelerator of self adaptation of zero wait state runnability in reservoir, dominant frequency is up to 180MHz MPU, it is possible to realize height
Reach the performance of 225DMIPS/1.25DMIPS/MHz, there is DSP instruction set.
Described ARM engineering module uses LPC1788FBD208 cake core, mainly realizes power quality parameter result
Carry out storing and managing and show.LPC1788 is the ARM Cortex-M3 microcontroller of integrated LCD image controller, is
NXP quasiconductor for various senior communications, high quality graphic the application scenario such as show and design a there is high integration, with
Cortex-M3 is the microcontroller of kernel, and this microcontroller includes lcd controller, and the Ethernet EMAC, USB of 10/100 are complete
Speed Device/Host/OTG controller, CAN controller, SPI, SSP, IIC, IIS and external storage controller EMC etc.
Resource.
Gps clock module: be connected to DSP data processing module, with the unified different electric pressure of GPS clock signal calibration
Under the system time of monitoring device, when in multistage power grid certain point be short-circuited fault time, GPS clock signal can effectively be protected
The monitoring device demonstrate,proved under each electric pressure has high time precision to the monitoring of voltage dip start/stop time, its time precision
Can reach microsecond, so that the synchronous monitoring that each monitoring device is to same voltage sag source, relative time precision can reach 10
Within microsecond.
In the present embodiment, described voltage dip synchronous monitoring device also include electrically connecting with described signal processor for
Show inquiry and the LCD liquid crystal display screen arranged on the spot.Query function include firm power parameter, quality of voltage, voltage harmonic,
Real-time curve and history curve inquiry, voltage dip event record ripple and analysis inquiry.Function is set: system is arranged, can basis
Actual field situation is configured etc..
The voltage dip synchronous monitoring system of multistage power grid of the present utility model, is respectively provided with one at every one-level bus nodes
Voltage dip synchronous monitoring device, and each voltage dip synchronous monitoring device is all connected with described upper machine communication, institute
State the voltage dip synchronous monitoring device quality of power supply information for the every first nodes of monitoring in real time, be uploaded to host computer in real time,
When occur voltage dip time can be real-time this signal is transferred to host computer, it is simple to host computer carries out follow-up analysis and evaluation.
Each voltage dip synchronous monitoring device is provided with gps clock module, it is possible to the effective monitoring ensured under each electric pressure
Device has high time precision to the monitoring of voltage dip start/stop time, and its time precision can reach microsecond, so that respectively
The monitoring device synchronous monitoring to same voltage sag source, within relative time precision can reach 10 microseconds.
These are only embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, every profit
The equivalent structure made by this utility model description and accompanying drawing content or equivalence flow process conversion, or directly or indirectly it is used in it
The technical field that he is correlated with, is the most in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. the voltage dip synchronous monitoring system of a multistage power grid, it is characterised in that: include being located at the every of each transmission line circuit
Voltage dip synchronous monitoring device at one electric pressure bus nodes and leading to each voltage dip synchronous monitoring device
The host computer that news connect, described voltage dip synchronous monitoring device includes and three the first current transformers on bus and three
The letter that the signal acquisition module of the electrical connection that the secondary side of voltage transformer all electrically connects electrically connects with described signal acquisition module
Number gps clock module that processor electrically connects with described signal processor and for the first communication being connected with upper machine communication
Module.
2. the voltage dip synchronous monitoring system of multistage power grid as claimed in claim 1, it is characterised in that: described signals collecting
Module includes that the voltage x current all electrically connected with the secondary side of described three voltage transformers and three the first current transformers becomes
The Signal-regulated kinase sending module to electrically connect with described voltage x current transmitting module electrically connects with described Signal-regulated kinase
A/D modular converter and the phaselocked loop all electrically connected with described A/D modular converter and Signal-regulated kinase.
3. the voltage dip synchronous monitoring system of multistage power grid as claimed in claim 2, it is characterised in that: described voltage x current
Transmitting module include three voltage transmission circuit electrically connecting with the secondary side one_to_one corresponding of described three voltage transformers and
Three the electric current transmission circuits electrically connected with described three the first Current Transformer Secondary side one_to_one corresponding；
Each voltage transmission circuit all includes the first to the 8th resistance and the first electric capacity, and the first end of the first resistance is with corresponding
Voltage transformer electrical connection, the second end passes sequentially through ground connection after the second resistance, the 3rd resistance and the 4th resistance, described first electricity
Hold and be connected with described 4th resistor coupled in parallel, and the node between the first electric capacity and described 4th resistance and described signal condition mould
Block electrically connects；Node between described second resistance and described 3rd resistance also pass sequentially through the 5th resistance, the 6th resistance, the 7th
It is connected with the node between described 3rd resistance and the 4th resistance after resistance and the 8th resistance；
Each electric current transmission circuit all includes one second current transformer, the 9th resistance, the tenth resistance, described electric current transmission circuit
Being electrically connected with the first corresponding Current Transformer Secondary side by the primary side of this second current transformer, described second electric current is mutual
The secondary side of sensor has two pins, and first pin electrically connects with described Signal-regulated kinase, also passes sequentially through described
Ground connection after nine resistance and the tenth resistance, second pin is directly grounded.
4. the voltage dip synchronous monitoring system of multistage power grid as claimed in claim 3, it is characterised in that: described signal condition
Module includes and three voltage transmission circuit and three electric current transmission circuits six signal conditioning circuits, Mei Yixin one to one
Number modulate circuit all includes operational amplifier, the 11st to the 14th resistance and the second electric capacity, described operational amplifier same
Phase input is connected with corresponding transmission circuit by described 11st resistance, and the inverting input of described operational amplifier passes through
12nd resistance eutral grounding, is also directly joined directly together with outfan by the 13rd resistance, and described outfan also passes sequentially through the tenth
Four resistance and the second capacity earth, the node between described 14th resistance and the second electric capacity is electrically connected with described A/D modular converter
Connect.
5. the voltage dip synchronous monitoring system of multistage power grid as claimed in claim 2, it is characterised in that: described phaselocked loop is adopted
Using general integrated phase lock, model is CD4046.
6. the voltage dip synchronous monitoring system of the multistage power grid as described in claim any one of claim 1 to 5, it is special
Levy and be: described host computer has the second communication module being connected with described first communication module communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866378.4U CN205861836U (en) | 2016-08-11 | 2016-08-11 | The voltage dip synchronous monitoring system of multistage power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866378.4U CN205861836U (en) | 2016-08-11 | 2016-08-11 | The voltage dip synchronous monitoring system of multistage power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205861836U true CN205861836U (en) | 2017-01-04 |
Family
ID=57658466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620866378.4U Active CN205861836U (en) | 2016-08-11 | 2016-08-11 | The voltage dip synchronous monitoring system of multistage power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205861836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787186A (en) * | 2017-11-15 | 2019-05-21 | 中国电力科学研究院有限公司 | A kind of multistage power grid wide area definite value check method and system based on cloud platform |
| CN111027503A (en) * | 2019-12-18 | 2020-04-17 | 广东电网有限责任公司 | Method for adaptively unifying time scales of power quality data |
-
2016
- 2016-08-11 CN CN201620866378.4U patent/CN205861836U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787186A (en) * | 2017-11-15 | 2019-05-21 | 中国电力科学研究院有限公司 | A kind of multistage power grid wide area definite value check method and system based on cloud platform |
| CN111027503A (en) * | 2019-12-18 | 2020-04-17 | 广东电网有限责任公司 | Method for adaptively unifying time scales of power quality data |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104698320B (en) | The electric Parameter Measuring device and method of power transmission and distribution circuit | |
| CN202443082U (en) | Merging unit test system with analog input and university | |
| CN103076491B (en) | Supply line's detection method of AC/DC universal and testing circuit | |
| CN106124844B (en) | A kind of direct current bus voltage detecting circuit | |
| CN204666727U (en) | Based on the large ground network footing impedance measuring apparatus of GPS | |
| CN102539916A (en) | Synchronous phasor measuring device of ship electrical power system | |
| CN204495932U (en) | The electric Parameter Measuring device of power transmission and distribution circuit | |
| CN205861836U (en) | The voltage dip synchronous monitoring system of multistage power grid | |
| CN201402293Y (en) | Distributed wireless insulation live testing system for high-voltage equipment | |
| CN105004943A (en) | Electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side | |
| CN104330681A (en) | Device for detecting AC entering DC bus in DC power system | |
| CN202372569U (en) | Power parameter measuring device | |
| CN204439725U (en) | Capacitor banks fault detection system | |
| CN106707075A (en) | Online electric energy quality monitoring system based on ARM and FPGA | |
| CN205246757U (en) | Electric energy meter signal acquisition metering modules | |
| CN101458275A (en) | High temperature resistant three phase intermediate frequency electric quantity acquisition module | |
| CN102830317A (en) | Distributed power generating dispersed state monitoring device | |
| CN202631626U (en) | Multi-path collection system of intelligent electric meter | |
| CN104101806A (en) | ARM and DSP based multi-circuit power quality online monitoring device | |
| CN205749669U (en) | A kind of three-phase remote bill control intelligent electric energy meter | |
| CN205120856U (en) | Power quality monitor device of transformer substation | |
| CN202189088U (en) | Alternating-current voltage isolating and measuring circuit based on combination of mutual inductor and operational amplifier | |
| CN204882734U (en) | Can be at electrified electric energy quality monitoring and electric energy metering device who installs and removes of high -pressure side | |
| CN203965545U (en) | Multiloop electric energy quality on-line monitoring device based on ARM and DSP | |
| CN202929190U (en) | Relay protection tester inspection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |