CN207689566U - A kind of broadband electromagnetic transient overvoltage sampling apparatus - Google Patents
A kind of broadband electromagnetic transient overvoltage sampling apparatus Download PDFInfo
- Publication number
- CN207689566U CN207689566U CN201721854227.8U CN201721854227U CN207689566U CN 207689566 U CN207689566 U CN 207689566U CN 201721854227 U CN201721854227 U CN 201721854227U CN 207689566 U CN207689566 U CN 207689566U
- Authority
- CN
- China
- Prior art keywords
- recording
- triggering
- phase detection
- phase
- unit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model is related to a kind of broadband electromagnetic transient overvoltage sampling apparatuses, it is characterized in that, including three single-phase detection modules, each single-phase detection module is installed by independent condenser divider nearby, and the recording triggering fiber optic serial bus between three single-phase detection modules carries out annular connection using multimode pigtail.When with the utility model, when implementing to monitor on-line to power grid, realize that low frequency 10kHz whole process recording and high frequency 10MHz trigger recording.Recording is triggered according to the frequency of 10kHz acquisition signals or the waveform recording of the triggering such as voltage disturbance 10MHz, waveform recording 0~5s of duration, while recording triggering moment, main triggering phase, from triggering phase, triggering mode and parameter.The functions such as analysis, alarm and historical query are provided, and take related quick response braking measure according to the monitoring data of its offer using software processing system simultaneously, to realize the safe operation for ensureing power grid.
Description
Technical field
The utility model is related to a kind of broadband electromagnetic transient overvoltage sampling apparatuses, for extra-high voltage alternating current-direct current series-parallel connection electricity
The on-line monitoring of net realizes that low frequency 10kHz whole process recording and high frequency 10MHz trigger recording.
Background technology
China's extra-high voltage alternating current-direct current serial-parallel power grid is gradually forming, and precedent is also had no in foreign countries.The electricity east of Anhui in 2013
During delivering stream UHV Transmission Engineering debugging, when ultra-high voltage main transformer input power grid has occurred, transient swing occurs for voltage,
Cause to give extra-high voltage direct-current and Lin Feng DC converter valve commutation failures again, direct current is caused to convey the event of significantly load down, it is right
The safe and stable operation of power grid generates harmful effect.Show that the changes of operating modes of extra-high-voltage alternating current system may be to extra-high straightening
The stability of stream transmission system has an adverse effect.Therefore carry out AC system voltage fluctuation in extra-high voltage alternating current-direct current serial-parallel power grid
The research influenced on straight-flow system is very urgent.
Invention content
The purpose of this utility model is to provide a kind of on-line monitoring that can be suitable for extra-high voltage alternating current-direct current serial-parallel power grid, real
Existing low frequency 10kHz whole process recording and high frequency 10MHz trigger recording.
In order to achieve the above object, there is provided a kind of broadband electromagnetic transient overvoltages for the technical solution of the utility model
Sampling apparatus, which is characterized in that including three single-phase detection modules, each single-phase detection module passes through independent condenser type nearby
Divider is installed, and the recording triggering fiber optic serial bus between three single-phase detection modules carries out annular even using multimode pigtail
It connects, wherein each single-phase detection module includes low frequency signal conditioning unit and high-frequency signal conditioning unit, and low frequency signal conditioning is single
Member and high-frequency signal conditioning unit are connected with low speed A/D converting units and high-speed a/d converting unit respectively, and low speed A/D conversions are single
Carry the FPGA of dual port RAM inside member and high-speed a/d converting unit phase downlink connection, FPGA draw outward optical fiber recording triggering end and
Optical fiber B code input terminals, FPGA is also connected with storage unit and CPU processing units are connected, CPU processing unit connection communication units.
Preferably, the Operating Voltage signal of each phase is by capacitive divider, signal attenuator decompression transformation impedance
Afterwards, the single-phase detection module is accessed.
Preferably, the data communication optical fiber network interface of the single-phase detection module is pooled to data exchange by multimode pigtail
Machine.
Preferably, the CPU processing units also store/are arranged interface, signal designation unit with static storage cell, parameter
It is connected.
When with the utility model, when implementing to monitor on-line to power grid, low frequency 10kHz whole process recordings are realized, and high
Frequency 10MHz triggers recording.Whole recording is with the whole waveforms of picking rate record of 10kHz and corresponding time.Trigger recording foundation
10kHz acquires the waveform recording of the triggering such as frequency or voltage disturbance of signal 10MHz, and waveform recording 0~5s of duration is recorded simultaneously
Triggering moment, main triggering phase, from triggering phase, triggering mode and parameter.Simultaneously using software processing system according to the prison of its offer
Measured data provides the functions such as analysis, alarm and historical query, and takes related quick response braking measure, ensures electricity to realize
The safe operation of net.
Description of the drawings
Fig. 1 is the circuit block diagram of single-phase detection module.
Specific implementation mode
To make the utility model be clearer and more comprehensible, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
A kind of broadband electromagnetic transient overvoltage sampling apparatus provided by the utility model is by three single-phase detection module groups
At each single-phase detection module is installed by independent condenser divider nearby, avoids three from alternate interfering with each other.Three lists
Recording triggering fiber optic serial bus between phase detection module carries out annular connection using multimode pigtail, realizes that a certain phase detects
The recording record for triggering other two-phases is synchronized when overvoltage data.
The data communication optical fiber network interface of each single-phase detection module is pooled to data switching exchane by multimode pigtail, realizes inspection
It is sent on survey module recorder data.
The power input of single-phase detection module is AC220V/50Hz alternating currents, and input is sent after being isolated by linear transformer
Switching Power Supply input terminal, switched power output supply detection circuit.Device uses two-stage power filter mode, drops as far as possible
Interfering with each other between the low detection module per phase.
As shown in Figure 1, for the circuit block diagram of single-phase detection module, all working process of detection module passes through FPGA
And CPU processing cores are coordinated to complete, and select ARM7 series STM32F103 processors as CPU processing cores, utilize FPGA
(XILINX-XC6SLX45T) rapid data collection, analyzing processing are carried out.
The 1 high-precision satellite time synchronizations of μ s are completed by clock synchronization input circuit, are completed by data communication circuit and outer
The 100M TCP/IP network data exchanges in portion are arranged interface by parameter testing and are being detected the design parameter setting of module (just
Parameter setting is carried out using fibre-optic data communication mouth) when often operation.
Operating Voltage signal accesses detection module after capacitive divider, signal attenuator decompression transformation impedance,
Detection module input terminal uses high impedance, and carries out full symmetric design to input circuit to improve anti-common mode interference ability.
Input signal is divided into 2 road signals and inputs 10ksps low channels and 10Msps hf channels respectively.
Input signal accesses low speed A/D acquisition chips by low channel signal conditioning circuit.Low speed A/D acquisition chips
Using the ADS8329 (16-Bit, 1MSPS, ADS, Serial SPI Interface) of TI companies.
Low frequency acquires the voltage data of A/D chips conversion output, and internal dual port RAM is buffered to by FPGA.Dual port RAM point
2 pieces of regions, the 1st piece when writing full, then the 2nd piece is write, forming 1-2 cycle storages ensures the integrality of recorder data；CPU passes through judgement
Full scale note is write, the dual port RAM data of corresponding region are read.Then analysis of data collected and waveform number is sent out in real time by Ethernet
According to.
Input signal accesses high-speed a/d acquisition chip by hf channel signal conditioning circuit.High-speed a/d acquisition chip
Using ADS5560 (16-Bit, 40MSPS, ADC, DDR LVDS Outputs).
High frequency acquires the voltage data of A/D chips conversion output, is buffered to internal dual port RAM by FPGA, then by interior
Portion's logic reads the real-time waveform storage region that dual port RAM data are saved in DDR3, and when there is recording trigger signal, extraction is corresponding
Real-time waveform data, triggering moment, triggering phase (A/B/C phases), triggering mode etc. to DDR3 recording storage regions；CPU passes through
Dual port RAM in FPGA accesses DDR3 and obtains recorder data.
Virtual value calculates, and FPGA carries out monocycle root mean square calculation virtual value to collected 10ksps data.
Frequency calculates, and FPGA carries out monocycle frequency calculating (low-pass filtering-＞ waveforms to collected 10ksps data
Be converted to square wave-＞ acquisitions square-wave cycle)
Harmonics Calculation, FPGA carry out 1024 point FFT conversions, obtain the amplitude of each frequency point to collected 10ksps data.
Frequency disturbance starts：When the frequency values of voltage are more than or equal to setting upper limit value, generation recording trigger signal；Work as voltage
Frequency values be less than or equal to preset lower limit when, generate recording trigger signal.
Harmonic disturbance starts：When the harmonic component of voltage is more than or equal to setting upper limit value, generation recording trigger signal.
Voltage jump starts：When the current cycle virtual value of voltage is more than or equal to setting upper limit value, generation recording triggering letter
Number；When the current cycle virtual value of voltage is less than or equal to preset lower limit, recording trigger signal is generated.
Overvoltage starts：When the instantaneous value of voltage is more than the limit value of setting, recording trigger signal is generated.
It manually boots：Triggering or Far end control signal triggering are inputted by remote signalling, generates recording trigger signal.
Active recording triggers, this is mutually triggered, and sends out 1 optical fiber recording trigger signal.
Driven recording triggering, receives optical fiber recording trigger signal, then this is mutually triggered, and sends out 1 optical fiber recording triggering
Signal transmission is to another phase (such as A phases to B phases, B phases to C phases, C phases to A phases).
Module detection circuit part installs full-shield shell, and input uses Q9/BNC interfaces, input negative terminal outer with shielding
Shell reliable connected.Shielding case is designed as double layer material, can play good shielding action to high frequency and low-frequency disturbance, shielding
On the one hand cover configuration design can reduce the capacity plate antenna effect between adjacent block, and can be maximum at cylinder D type structures
Degree shields interference signal.The corresponding arranging shielding cover of circuit back, Edge Distance of the shielding case apart from printing forme are no less than 10mm,
Incuded with the electromagnetic signal of crust of the device with reducing.
Detection module transmits and receives with external data communication and is all made of optical fiber solutions, and fiber bandwidth is big, decaying is small, i.e.,
Make also interference-free in the very strong environment of electromagnetic wave.Clock synchronization, which synchronizes, in data communication uses B code optical fiber, multimode 820nm
(50/125 μm) ST connectors.Data communication uses TCP/IP optical fiber network interfaces, multimode 1300nm (50/125 μm) SC connectors.Recording
Triggering uses fiber optic serial bus, multimode 820nm (50/125 μm) ST connectors.
Detection module supply input is inputted using Industrial Frequency Transformer, is inputted as alternating current 220V, and power supply output is 12V, and is
Power Management Design low-pass filtering, common mode DM EMI inhibit circuit.Using R type transformer linear power supplies, there is efficient, shape ruler
It is very little it is small, electromagnetic interference is small, noise is small, the low plurality of advantages of warm liter.The polyester of B-class insulation is used between R types primary and secondary
Film bundling, breakdown voltage are more than 3000V, and all primary and secondary leads are all made of double insulated conductors, transformer efficiency selection according to
50% load factor of efficiency peak.
Claims (4)
1. a kind of broadband electromagnetic transient overvoltage sampling apparatus, which is characterized in that including three single-phase detection modules, Mei Gedan
Phase detection module is installed by independent condenser divider nearby, and the recording between three single-phase detection modules triggers optical fiber string
Row bus carries out annular connection using multimode pigtail, wherein each single-phase detection module includes low frequency signal conditioning unit and height
Frequency signal condition unit, low frequency signal conditioning unit and high-frequency signal conditioning unit respectively with low speed A/D converting units and high speed
A/D converting units are connected, with dual port RAM inside low speed A/D converting units and high-speed a/d converting unit phase downlink connection
FPGA, FPGA draw optical fiber recording triggering end and optical fiber B code input terminals outward, and FPGA is also connected with storage unit and CPU processing
Unit is connected, CPU processing unit connection communication units.
2. a kind of broadband electromagnetic transient overvoltage sampling apparatus as described in claim 1, which is characterized in that the electricity of each phase
Network operation voltage signal accesses the single-phase detection module after capacitive divider, signal attenuator decompression transformation impedance.
3. a kind of broadband electromagnetic transient overvoltage sampling apparatus as described in claim 1, which is characterized in that the single-phase inspection
The data communication optical fiber network interface for surveying module is pooled to data switching exchane by multimode pigtail.
4. a kind of broadband electromagnetic transient overvoltage sampling apparatus as described in claim 1, which is characterized in that at the CPU
Unit also stores/is arranged interface with static storage cell, parameter to reason, signal designation unit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721854227.8U CN207689566U (en) | 2017-12-26 | 2017-12-26 | A kind of broadband electromagnetic transient overvoltage sampling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721854227.8U CN207689566U (en) | 2017-12-26 | 2017-12-26 | A kind of broadband electromagnetic transient overvoltage sampling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207689566U true CN207689566U (en) | 2018-08-03 |
Family
ID=62995889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721854227.8U Expired - Fee Related CN207689566U (en) | 2017-12-26 | 2017-12-26 | A kind of broadband electromagnetic transient overvoltage sampling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207689566U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109495181A (en) * | 2018-12-07 | 2019-03-19 | 青岛海信宽带多媒体技术有限公司 | Optical module signal processing method, device and optical module |
| CN109581051A (en) * | 2018-10-25 | 2019-04-05 | 浙江华云清洁能源有限公司 | Adaptive full frequency-domain Wave record method |
| CN109581050A (en) * | 2018-10-25 | 2019-04-05 | 浙江华云清洁能源有限公司 | It is distributed the full frequency-domain recording system of centralization |
| CN109633296A (en) * | 2018-10-25 | 2019-04-16 | 国网浙江省电力有限公司检修分公司 | A kind of full frequency-domain wave recording device |
| CN109932619A (en) * | 2019-04-15 | 2019-06-25 | 长园深瑞继保自动化有限公司 | Power distribution network electronic sensor secondary singal collector |
| CN110058080A (en) * | 2018-10-25 | 2019-07-26 | 国网浙江省电力有限公司检修分公司 | A kind of adaptive full frequency-domain recording system and method that can trigger transient high frequency acquisition |
| CN112816769A (en) * | 2019-11-15 | 2021-05-18 | 许继集团有限公司 | Current and voltage combined data acquisition device |
-
2017
- 2017-12-26 CN CN201721854227.8U patent/CN207689566U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581051A (en) * | 2018-10-25 | 2019-04-05 | 浙江华云清洁能源有限公司 | Adaptive full frequency-domain Wave record method |
| CN109581050A (en) * | 2018-10-25 | 2019-04-05 | 浙江华云清洁能源有限公司 | It is distributed the full frequency-domain recording system of centralization |
| CN109633296A (en) * | 2018-10-25 | 2019-04-16 | 国网浙江省电力有限公司检修分公司 | A kind of full frequency-domain wave recording device |
| CN110058080A (en) * | 2018-10-25 | 2019-07-26 | 国网浙江省电力有限公司检修分公司 | A kind of adaptive full frequency-domain recording system and method that can trigger transient high frequency acquisition |
| CN109495181A (en) * | 2018-12-07 | 2019-03-19 | 青岛海信宽带多媒体技术有限公司 | Optical module signal processing method, device and optical module |
| CN109495181B (en) * | 2018-12-07 | 2021-09-10 | 青岛海信宽带多媒体技术有限公司 | Optical module signal processing method and device and optical module |
| CN109932619A (en) * | 2019-04-15 | 2019-06-25 | 长园深瑞继保自动化有限公司 | Power distribution network electronic sensor secondary singal collector |
| CN109932619B (en) * | 2019-04-15 | 2022-02-22 | 长园科技集团股份有限公司 | Secondary signal collector of electronic sensor of power distribution network |
| CN112816769A (en) * | 2019-11-15 | 2021-05-18 | 许继集团有限公司 | Current and voltage combined data acquisition device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207689566U (en) | A kind of broadband electromagnetic transient overvoltage sampling apparatus | |
| CN107255758A (en) | A kind of broadband multi-frequency electrical quantity unified measurement analysis system and implementation method | |
| CN101408565B (en) | 35KV power distribution station internal and external over voltage monitoring method based on voltage mutual inductor sampling | |
| CN103344821A (en) | Transient overvoltage on-line monitoring system based on CVT and provided with built-in low-voltage capacitor | |
| CN105137158A (en) | Power system temporary overvoltage monitoring system | |
| CN103454520A (en) | Transformer winding deformation on-line monitoring method based on on-line frequency response method | |
| CN201637803U (en) | Portable failure data recorder | |
| CN103033685B (en) | Based on the broadband harmonic measure system and method for frequency-division section two-way filtering | |
| CN202189108U (en) | On-line monitoring device for high voltage shunt capacitor | |
| CN203337722U (en) | Voltage and current collecting device of grid overhead transmission line | |
| CN103454552A (en) | Transformer winding deformation on-line monitoring chip | |
| CN201859178U (en) | Metering device for harmonic electric energy | |
| CN110470963A (en) | A kind of high voltage capacitive apparatus insulated performance on-line monitoring device based on DSP | |
| CN204462246U (en) | A kind of HVDC (High Voltage Direct Current) transmission line corona loss measuring system | |
| CN105092947B (en) | A kind of over-voltage monitoring system and method for three-phase circuit | |
| CN105092946A (en) | Three-phase circuit overvoltage monitoring system | |
| CN203178369U (en) | Bushing monitoring system for intelligent substation | |
| CN205404703U (en) | Electric energy quality disturbance alarm system | |
| CN202614831U (en) | Transient overvoltage on-line monitoring system | |
| CN204832330U (en) | Transient overvoltage monitoring facilities | |
| CN204613347U (en) | A kind of compartment traveling wave ranging device | |
| CN203149025U (en) | Transient overvoltage monitoring system | |
| CN206832933U (en) | The equal properties of flow test system of lightning arrester connected in parallel | |
| CN203133201U (en) | Integrated measurement device for energy-storage grid-connected system | |
| CN204649833U (en) | A kind of shunting of the large ground network based on ZIGBEE wireless sense network phasor measuring set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180803 Termination date: 20191226 |