CN208399604U - A kind of power quality compares standard measuring equipment online - Google Patents
A kind of power quality compares standard measuring equipment online Download PDFInfo
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- CN208399604U CN208399604U CN201820887205.XU CN201820887205U CN208399604U CN 208399604 U CN208399604 U CN 208399604U CN 201820887205 U CN201820887205 U CN 201820887205U CN 208399604 U CN208399604 U CN 208399604U
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Abstract
The utility model relates to electric device maintenance technical fields, standard measuring equipment is compared online more particularly to a kind of power quality, is specifically included including synchronized sampling module, micro controller module, outer memory module, interface module, input/output module, supplementary module, power module；The device completes clock sync identification using IEEE1588 agreement, realize that data are transmitted using IEC61850 communication protocol, it realizes and completes the online test for comparing every power quality index precision when tested equipment for monitoring power quality is without removing, the utility model solves the difficulty that equipment for monitoring power quality can not be calibrated, realize that detection data uploads automatically, do not changing tested equipment for monitoring power quality wiring, in the case where terminating tested equipment for monitoring power quality normal work in short-term, complete the on-site test to tested equipment for monitoring power quality, improve detection efficiency, reduce cost of human and material resources, so that the periodic detection work of equipment for monitoring power quality can effectively be carried out.
Description
Technical field
The utility model relates to electric device maintenance technical fields, and in particular to a kind of power quality compares standard survey online
Measure device.
Background technique
The operational management of electric energy quality on-line monitoring device is one of the action of power quality technical supervision.Electric energy matter
Measure on-Line Monitor Device in severe electromagnetic environment for a long time run after, inevitably can due to component aging, failure and cause
The reliability of device, accuracy of measurement decline, and then generate a large amount of invalid, abnormal datas, it is therefore desirable to it is periodically examined
It surveys.
Currently, electric energy quality on-line monitoring device detection is normally based on standard source method to realize, and mainly have following two
Kind implementation: 1, removing electric energy quality on-line monitoring device and be sent to laboratory, then controls standard source and exports specified parameter
Electric energy quality signal to equipment for monitoring power quality, finally by the measurement result of equipment for monitoring power quality and standard signal into
Row compares, to judge whether the accuracy of measurement of the device is qualified.And the shortcomings which, is online to supervise power quality
It surveys device and dismounts back and forth and need out multiple work ticket, in addition transport trouble, time-consuming, need consuming longer so that completing an inspection
Time, working efficiency is very low, has seriously affected the normal work of monitoring device.2, standard source is carried to scene, so
Electric energy quality on-line monitoring device is removed into carry out on-site test afterwards.The shortcomings which, is standard source (such as: FLUKE
6100 series) usually volume should not carry greatly, instrument is very accurate to be easily damaged, and also needs to carry several standard sources one sometimes
One three-phase circuit of composition is played to be detected.Although some portable standard sources are (such as: the CMC series mark of Omicron company production
Quasi- source) it is easy-to-use, but the accuracy of its output signal is lower, especially for some higher hamonic wave signals generation not
Ideal, therefore necessarily will affect the testing result of monitoring device.
In conclusion there are many deficiencies for the prior art, and since electric energy quality on-line monitoring device has quantity many
It the characteristics of more, installation disperses, if carrying out periodic detection to it according to the prior art, is necessarily required to put into great manpower and object
Power, therefore realizability is poor, so that periodic detection work is difficult to effectively carry out.As it can be seen that it is necessary to study it is a kind of it is easy to use, can
The detection device of the electric energy quality on-line monitoring device leaned on substantially reduces the detection difficulty of electric energy quality on-line monitoring device, mentions
High detection efficiency, while cost of human and material resources are reduced, so that the periodic detection work of electric energy quality on-line monitoring device can
Effectively carry out, to guarantee the accuracy of measurement of every power quality index, veritably falls power quality technological supervision work
To crucial point, escort for safe and stable, the economical operation of power grid.
Summary of the invention
To solve the above-mentioned problems, the utility model provides a kind of power quality and compares standard measuring equipment online, has
Body technique scheme is as follows:
It includes that synchronized sampling module, micro controller module, outside are deposited that a kind of power quality compares standard measuring equipment online
Store up module, interface module, input/output module, supplementary module, power module；The synchronous acquisition module is used for three-phase electricity
Pressure, electric current are improved, locking phase, sampling and sampled data are transmitted to micro controller module；The micro controller module is used for
Clock synchronization is synchronized with electric energy quality on-line monitoring device, calculates power quality index；The outer memory module is for extending
Data storage；The interface module is for providing serial ports, Ethernet interface, USB interface；The input/output module is used for data
Input is exported with data；The supplementary module is for providing clock, system configuration and internal electric source detection；The power module is used
In offer power supply；The synchronized sampling module, outer memory module, interface module, input/output module, supplementary module, power supply
Module is connect with micro controller module respectively；The micro controller module includes IEEE1588 precision interval clock synchronous protocol, intelligence
Transformer substation IEC 61850 specification.
Further, the synchronized sampling module includes signal conditioning unit, A/D sampling unit, zero passage detection unit, locking phase
Ring element；The signal conditioning unit is connect with A/D sampling unit, zero passage detection unit respectively, the zero passage detection unit with
Phase locked-loop unit connection, the phase locked-loop unit, A/D sampling unit are connect with micro controller module respectively.
Further, the outer memory module includes FLASH and SDRAM memory.
Further, the interface module includes serial ports, Ethernet interface, USB interface；The serial ports include RS233 serial ports,
RS485 serial ports.
Further, the input/output module includes key, indicator light and LCD module；The key, indicator light are for real
Existing data input, the LCD module is for realizing data output.
Further, the supplementary module includes clock unit, system configuration unit, electric quantity of power supply detection unit；When described
Clock unit is for providing clock data；The system configuration unit is for configuring system parameter；The electric quantity of power supply detection unit
For detecting the remaining situation of electric quantity of power supply.
Further, the power module includes DC-DC voltage conversion unit.
The utility model has the following beneficial effects:
The utility model provides a kind of power quality and compares standard measuring equipment online, which meets IEEE1588 association
View, can complete precision interval clock sync identification, realize that data are transmitted using IEC61850 communication protocol, realize tested power quality
Monitoring device completes the online test for comparing every power quality index precision without removing, and the utility model is non-
Often suitable for the precision for detecting erecting bed and the equipment for monitoring power quality after operation a period of time, because power quality is supervised
It surveys device and is mounted on online comparison substation field after network access testing, long-play easily causes accuracy decline, if removing
Equipment for monitoring power quality send laboratory testing trouble, while there is also voltage circuit short circuit, current loop open circuits etc. for substation
Security risk.The utility model can farthest improve the safety of work on the spot, solve equipment for monitoring power quality without
The difficulty of method calibration realizes that detection data uploads automatically, is not changing tested equipment for monitoring power quality wiring, terminating in short-term
In the case that tested equipment for monitoring power quality works normally, complete to examine the scene of tested equipment for monitoring power quality
It surveys, improves detection efficiency, reduces cost of human and material resources, so that the periodic detection work of equipment for monitoring power quality can
Effectively carry out.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic illustration of the signal conditioning unit in the utility model in synchronized sampling module；
Fig. 3 is the schematic illustration of zero passage detection unit in the utility model in synchronized sampling module, phase locked-loop unit.
Specific embodiment
In order to better understand the utility model, the utility model is made in the following with reference to the drawings and specific embodiments further
Illustrate:
As shown in Figure 1, it includes synchronized sampling module, microcontroller mould that a kind of power quality compares standard measuring equipment online
Block, outer memory module, interface module, input/output module, supplementary module, power module；Synchronous acquisition module is used for three
Phase voltage, electric current improved, locking phase, sampling and sampled data is transmitted to micro controller module；Micro controller module is used for
Clock synchronization is synchronized with electric energy quality on-line monitoring device, calculates power quality index；Outer memory module is used for growth data
Storage；Interface module is for providing serial ports, Ethernet interface, USB interface；Input/output module inputs defeated with data for data
Out；Supplementary module is for providing clock, system configuration and internal electric source detection；Power module is for providing power supply；Synchronized sampling
Module, outer memory module, interface module, input/output module, supplementary module, power module connect with micro controller module respectively
It connects.
Synchronized sampling module includes signal conditioning unit, A/D sampling unit, zero passage detection unit, phase locked-loop unit；Signal
Conditioning unit is connect with A/D sampling unit, zero passage detection unit respectively, and zero passage detection unit is connect with phase locked-loop unit, locking phase
Ring element, A/D sampling unit are connect with micro controller module respectively.The schematic illustration of signal conditioning unit is as shown in Fig. 2, letter
Number conditioning circuit includes voltage circuit and current loop, and voltage circuit is divided using precision resistance by voltage transformer secondary side
57.74V voltage signal becomes 5V voltage signal, and current loop uses high precision electric current transducer HIOKI active probe CT6700
Current Transformer Secondary side 5A current signal is become into 5V voltage signal, then above-mentioned 5V voltage signal is sent into operational amplifier
OP07 chip, foundation are followed to improve input impedance, are reduced output impedance and are improved carrying load ability, current-limiting resistance Ri and sampling electricity
Hindering Rs is 2.5k Ω, and to prevent high-frequency signal from causing spectral aliasing in A/D sampling process, design frequency overlapped-resistable filter is made
AD706 chip is used with operational amplifier；A/D sampling unit meets three-phase using 16 A/D conversion chip AD7606 of high-precision
The sampling of voltage, electric current.Zero passage detection unit, phase locked-loop unit schematic illustration as shown in figure 3, zero passage detection unit use
Twin voltage comparable chip LM393, phase locked-loop unit use chip CD4046.
Micro controller module includes the DSP+ARM industrial handlers OMAPL138 of Texas Instruments (TI), double-core dominant frequency
For 456MHz, be internally integrated powerful multi-media processing unit, Digital Signal Processing DSP may be implemented electric energy quality harmonic,
The calculating and analysis of the indexs such as imbalance, flickering, voltage deviation and frequency departure, ARM is for realizing IEEE1588 precision interval clock
The operation of synchronous protocol, intelligent substation IEC61850 specification, the present embodiment preferably use (SuSE) Linux OS.
Outer memory module includes FLASH and SDRAM memory, passes through the interface EMIFA and microcontroller of OMAPL138
Module connection.Outer memory module expands 5 road chip selection signals, and 5 road chip selection signals are respectively CS1, CS2, CS3, CS4, CS5,
Outer memory module uses chip selection signal CS1 and chip selection signal CS3 to extend external FLASH and standard SD interface respectively, is used
Address width is A0 ~ A23, and data width is D0 ~ D15, and external FLASH uses Samsung 512Mbyte technical grade NAND FLASH core
Piece K9F1G08U0D.OMAPL138 and different SDRAM memory equipment are realized by the interface DDR2 interface of OMAPL138 simultaneously
Connection, external SDRAM memory use magnesium light 128Mbyte technical grade DDR2 chip MT47H64M16HR-25EIT:H, made
It is A0 ~ A13 with address width, data width is D0 ~ D15.
Interface module includes serial ports, Ethernet interface, USB interface；Serial ports includes RS233 serial ports, RS485 serial ports.Serial ports
It is mainly used for equipment debugging, belongs to internal exploitation debugging and use, RS233 string is obtained by MAX3232 serial port level conversion core piece
Mouthful, RS485 serial ports is obtained by ISO3082DW serial ports conversion chip；Ethernet is mainly used for equipment communication, data transmission, adopts
With the LAN8710 network card chip of SMSC, adaptively coupling coil can have been contained in 10/100M network, inside, therefore need not
Network transformer separately is connect, uses common direct-connected or crossover network cables to router or interchanger；USB be mainly used in it is various not
With the connection between equipment or mobile device, data exchange is carried out, realizes USB Host1.1 interface, the USB interface one with common PC
It causes, the common USB peripheral such as keyboard, mouse, USB flash disk can be connect.
Input/output module includes key, indicator light and LCD module；Key, indicator light are for realizing data input, LCD
Module is for realizing data output.Button design has 13 road keys, and indicator light design has 3 road indicator lights, can meet number, word
The input of the performance datas such as mother, determination/cancellation.LCD module using group create 7 cun of TFT liquid crystal screen module AT070TN83, it can be achieved that with
The connection of OMAPL138.
Supplementary module includes clock unit, system configuration unit, electric quantity of power supply detection unit；Clock unit is for when providing
Clock data；System configuration unit is for configuring system parameter；Electric quantity of power supply detection unit is used to detect the electricity residue feelings of power supply
Condition.Clock unit includes that OMAPL138 chip interior carries RTC clock controller and real-time timepiece chip DS1307, OMAPL138
The included RTC clock controller of chip interior can load onto battery i.e. in bottom plate and can be used, and real-time timepiece chip DS1307 can remember
Record the information such as year, month, day, hour, min, second.System configuration unit uses the AT24C02C configured with I2C bus interface and EEPROM
Chip, capacity 256Bytes, address are 0xA0.Electric quantity of power supply detection unit measures chip LTC2943 using battery capacity, can
5V battery is directly measured, realizes charge, voltage, electric current and temperature measurement accuracy within 1%.Said chip function is all made of
I2C bus realizes communication.
Power supply needed for power module provides device is powered using 5V and 3.3V, including 3 DC-DC voltage conversion units,
DC-DC voltage conversion unit includes the high DC-DC core voltage conversion electric power chip of conversion ratio, it can be achieved that the low function of the utility model
The function of consumption.
The working principle of the utility model are as follows: synchronized sampling module, starting acquisition sampling three are controlled by micro controller module
The data of phase voltage current signal, acquisition are stored in the SDRAM memory of outer memory module, reach after data analysis length by micro-
Controller module carries out power quality index and calculates analysis, will analyze result and is stored in the FLASH of outer memory module, finally by
Micro controller module receives external command and Analysis of Indexes of Power Quality result is uploaded to electric energy quality monitoring by interface module
The online Compare System of device, input/output module and supplementary module are mainly used for configuring the work such as setting, data export, status display
With working power needed for power module provides each module for whole device.The online Compare System packet of equipment for monitoring power quality
The network switch is included, detects host, tested equipment for monitoring power quality and the utility model pass through Ethernet and network respectively
Interchanger connection, the network switch by Ethernet with detection host connect, tested equipment for monitoring power quality, originally it is practical newly
Type, the network switch support precision interval clock synchronous protocol IEEE1588.In the case where examining and determine at the scene, tested power quality prison
The synchronized sampling module for surveying device and the utility model is connected to same monitoring point, while obtaining the power quality number of monitoring point
According to synchronous with tested equipment for monitoring power quality progress precision interval clock by the IEEE1588 agreement completion of micro controller module
Time service realizes that data are transmitted using IEC61850 communication protocol, the electricity that micro controller module obtains synchronized sampling module samples
Energy qualitative data carries out calculation processing and obtains every power quality index, then the utility model and tested electric energy quality monitoring
The power quality index data of acquisition are uploaded to detection host by device.Detect host to tested equipment for monitoring power quality and
Every power quality index that the utility model obtains the power quality data of monitoring point carries out online comparison accuracy difference, so
The equipment for monitoring power quality for then completing and being detected compares online, to realize the inspection to tested equipment for monitoring power quality
It is fixed.
The utility model is not limited to above-described specific embodiment, and the foregoing is merely the preferable of the utility model
Case study on implementation is not intended to limit the utility model, made within the spirit and principle of the present invention any
Modifications, equivalent substitutions and improvements etc., should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of power quality compares standard measuring equipment online, it is characterised in that: including synchronized sampling module, microcontroller mould
Block, outer memory module, interface module, input/output module, supplementary module, power module；The synchronous acquisition module is used for
Three-phase voltage, electric current are improved, locking phase, sampling and sampled data is transmitted to micro controller module；The microcontroller
Module is used to synchronize clock synchronization with electric energy quality on-line monitoring device, calculates power quality index；The outer memory module
It is stored for growth data；The interface module is for providing serial ports, Ethernet interface, USB interface；The input/output module
It is exported for data input with data；The supplementary module is for providing clock, system configuration and internal electric source detection；The electricity
Source module is for providing power supply；The synchronized sampling module, outer memory module, interface module, input/output module, auxiliary mould
Block, power module are connect with micro controller module respectively；The micro controller module includes the synchronous association of IEEE1588 precision interval clock
View, intelligent substation IEC61850 specification.
2. a kind of power quality according to claim 1 compares standard measuring equipment online, it is characterised in that: the synchronization
Sampling module includes signal conditioning unit, A/D sampling unit, zero passage detection unit, phase locked-loop unit；The signal conditioning unit
It is connect respectively with A/D sampling unit, zero passage detection unit, the zero passage detection unit is connect with phase locked-loop unit, the locking phase
Ring element, A/D sampling unit are connect with micro controller module respectively.
3. a kind of power quality according to claim 1 compares standard measuring equipment online, it is characterised in that: the outside
Memory module includes FLASH and SDRAM memory.
4. a kind of power quality according to claim 1 compares standard measuring equipment online, it is characterised in that: the interface
Module includes serial ports, Ethernet interface, USB interface；The serial ports includes RS233 serial ports, RS485 serial ports.
5. a kind of power quality according to claim 1 compares standard measuring equipment online, it is characterised in that: the input
Output module includes key, indicator light and LCD module；The key, indicator light are for realizing data input, the LCD module
For realizing data output.
6. a kind of power quality according to claim 1 compares standard measuring equipment online, it is characterised in that: the auxiliary
Module includes clock unit, system configuration unit, electric quantity of power supply detection unit；The clock unit is for providing clock data；
The system configuration unit is for configuring system parameter；The electric quantity of power supply detection unit is used to detect the remaining feelings of electric quantity of power supply
Condition.
7. a kind of power quality according to claim 1 compares standard measuring equipment online, it is characterised in that: the power supply
Module includes DC-DC voltage conversion unit.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146762A (en) * | 2019-06-05 | 2019-08-20 | 国网江苏省电力有限公司苏州供电分公司 | A kind of detachable loading tests device suitable for intelligent substation |
| CN110174568A (en) * | 2019-05-15 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | A kind of multiple services calibration system of equipment for monitoring power quality and its calibration method |
| CN110177091A (en) * | 2019-05-20 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | Realize the multiple services system and method for equipment for monitoring power quality |
| CN110177090A (en) * | 2019-05-20 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | Realize the system and method for the detection of equipment for monitoring power quality specification, on-the-spot testing |
| CN110177014A (en) * | 2019-05-20 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | Realize the system and method for the detection of equipment for monitoring power quality specification, monitoring analysis |
| WO2022088608A1 (en) * | 2020-10-29 | 2022-05-05 | 广西电网有限责任公司电力科学研究院 | On-site on-line comparison test device and method for power quality monitoring terminal |
-
2018
- 2018-06-08 CN CN201820887205.XU patent/CN208399604U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174568A (en) * | 2019-05-15 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | A kind of multiple services calibration system of equipment for monitoring power quality and its calibration method |
| CN110177091A (en) * | 2019-05-20 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | Realize the multiple services system and method for equipment for monitoring power quality |
| CN110177090A (en) * | 2019-05-20 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | Realize the system and method for the detection of equipment for monitoring power quality specification, on-the-spot testing |
| CN110177014A (en) * | 2019-05-20 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | Realize the system and method for the detection of equipment for monitoring power quality specification, monitoring analysis |
| CN110146762A (en) * | 2019-06-05 | 2019-08-20 | 国网江苏省电力有限公司苏州供电分公司 | A kind of detachable loading tests device suitable for intelligent substation |
| WO2022088608A1 (en) * | 2020-10-29 | 2022-05-05 | 广西电网有限责任公司电力科学研究院 | On-site on-line comparison test device and method for power quality monitoring terminal |
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