CN109298275A - A kind of monitoring system and device for taking into account arrester monitoring and electric energy quality monitoring - Google Patents
A kind of monitoring system and device for taking into account arrester monitoring and electric energy quality monitoring Download PDFInfo
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- CN109298275A CN109298275A CN201811222796.XA CN201811222796A CN109298275A CN 109298275 A CN109298275 A CN 109298275A CN 201811222796 A CN201811222796 A CN 201811222796A CN 109298275 A CN109298275 A CN 109298275A
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- monitoring
- arrester
- leakage current
- electric energy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to a kind of monitoring systems and device for taking into account arrester monitoring and electric energy quality monitoring, leakage current of an arrester is acquired by leakage current collection module, pass through voltage transformer acquisition system voltage, by current transformer acquisition system electric current, these information unifications of acquisition are passed into monitoring device and carry out the calculating of power quality and the calculating of arrester monitoring parameters.Set of system voltage collecting device, i.e. voltage transformer, which need to be only arranged, in the system can complete the calculating to power quality and the calculating of arrester monitoring parameters, increase information sharing degree, reduce system cost and maintenance cost.
Description
Technical field
The invention belongs to intelligent substation technical fields, and in particular to one kind takes into account arrester monitoring and electric energy quality monitoring
Monitoring system and device.
Background technique
With the popularization and application of intelligent substation, a large amount of arrester on-Line Monitor Device is mounted in substation, with right
Leakage current of an arrester, current in resistance property and action frequency are monitored on-line.Meanwhile as power grid and power consumer are to electric energy matter
The requirement of amount is higher and higher, and intelligent substation starts to pay attention to the on-line monitoring of power quality.
Currently, power quality on-line monitoring and arrester on-line monitoring are independent two classes devices.Power quality is supervised online
Device is surveyed by acquisition system Current Voltage, carries out analytical calculation to complete the real-time monitoring of power quality.Arrester is online
Monitoring device carries out analytical calculation and realizes arrester operating condition real-time monitoring by acquisition system voltage and leakage current of an arrester.
These two types of on-Line Monitor Devices are independently implemented, and the mode of monitoring device is directly accessed using analog quantity.Above scheme exists
It needs individually to lay a large amount of cables in intelligent substation and carries out analog quantity long distance transmission, cause device dry vulnerable to live electromagnetism
It disturbs, data distortion and device is caused to damage；And system voltage information multiple repairing weld, information sharing degree is low to be caused to repeat to adopt
Sample, autonomous system, which increases, excessively manages and maintains cost.
Summary of the invention
The purpose of the present invention is to provide it is a kind of take into account arrester monitoring and electric energy quality monitoring monitoring system and device,
To solve information sharing caused by when arrester on-Line Monitor Device and electric energy intelligent online monitoring device are respectively independently arranged
Degree is low, system need to excessively increase the problem of managing and maintaining cost.
In order to solve the above technical problems, the technical solution of the present invention is as follows:
A kind of monitoring system for taking into account arrester monitoring and electric energy quality monitoring of the invention, including at least one electric energy matter
Combiner, the corresponding line segregation of each power quality combiner are measured, each power quality combiner corresponds between a route
Every each power quality combiner also passes through corresponding voltage transformer by corresponding current transformer acquisition system electric current
Acquisition system voltage；Power quality combiner exports SV message to the digital interface of monitoring device；It further include leakage current collection
Module, the leakage current collection module are equipped with fiber-optic output, and fiber-optic output is connected to the monitoring device by optical fiber
Optical fiber interface；The monitoring device includes processor and memory, and the processor is stored in memory for executing
Instruction is to realize following method:
Receive the SV message that power quality combiner is sent and the fiber data message that leakage current collection module is sent；Solution
SV message is analysed, system voltage and system power are obtained；Fiber data message is parsed, leakage current of an arrester is obtained；According to system
Electric energy quality monitoring parameter is calculated in voltage and system power；System voltage and leakage current of an arrester are synchronized, and
According to synchronous system voltage and leakage current of an arrester, arrester monitoring parameters are calculated.
The monitoring device for taking into account arrester monitoring and electric energy quality monitoring of the invention, including the number for receiving SV message
Word interface and optical fiber interface for reception optical fiber data message；It further include processor and memory, the processor is for holding
Row instruction stored in memory is to realize following method:
Receive the SV message that power quality combiner is sent and the fiber data message that leakage current collection module is sent；Solution
SV message is analysed, system voltage and system power are obtained；Fiber data message is parsed, leakage current of an arrester is obtained；According to system
Electric energy quality monitoring parameter is calculated in voltage and system power；System voltage and leakage current of an arrester are synchronized, and
According to synchronous system voltage and leakage current of an arrester, arrester monitoring parameters are calculated.
Beneficial effects of the present invention:
The monitoring system and device for taking into account arrester monitoring and electric energy quality monitoring of the invention, passes through leakage current collection
Module acquires leakage current of an arrester, by voltage transformer acquisition system voltage, by current transformer acquisition system electric current,
These information unifications of acquisition are passed into monitoring device and carry out the calculating of power quality and the calculating of arrester monitoring parameters.It should
Set of system voltage collecting device (i.e. voltage transformer), which need to be only arranged, in system can complete the calculating to power quality and take shelter from the thunder
The calculating of device monitoring parameters increases information sharing degree, reduces system cost and maintenance cost.
As the further improvement of system and device, the fiber data message is FT3 message.Using FT3 message by
Leakage current of an arrester sends monitoring device to, and data transmission is reliable.
As the further improvement of system and device, when system voltage and leakage current of an arrester are synchronized, with
Come to carry out resampling to system voltage on the basis of leakage current of an arrester, realizes the same of system voltage and leakage current of an arrester
Step.In general, the sample frequency of system voltage is higher than the sample frequency of leakage current of an arrester, therefore with leakage current of an arrester
On the basis of to carry out resampling to system voltage so that the system voltage and leakage current of an arrester after what is obtained synchronize more subject to
Really.
As the further improvement of system, when there are two and the above number power quality combiner when, power quality is closed
And the output end of device connects interchanger, interchanger connects the monitoring device.Each power quality is forwarded to close by interchanger
And data transmitted by device, save the interface quantity of monitoring device.
As the further improvement of system, the monitoring device includes power insert, graphic interface plug-in unit, CPU card, deposits
Storage plug-in unit, NPI plug-in unit, outputs plug-in unit at FT3 plug-in unit；Wherein, the FT3 plug-in unit is for receiving the transmission of leakage current collection module
FT3 message, the NPI plug-in unit be used for receive power quality combiner transmission SV message, the processor and memory are set
It sets on the CPU card.Monitoring device of the invention is realized by the card format of existing device, it is more convenient.
As the further improvement of system, the leakage current collection module is mounted on arrester ground line.It will leakage
Current acquisition module is mounted on arrester ground line, safer.
As the further improvement of device, which further includes power insert, graphic interface plug-in unit, CPU card, stores and insert
Part, NPI plug-in unit, outputs plug-in unit at FT3 plug-in unit；Wherein, the FT3 plug-in unit is used to receive the FT3 of leakage current collection module transmission
Message, the NPI plug-in unit are used to receive the SV message of power quality combiner transmission, and the processor and memory are arranged in institute
It states on CPU card.Monitoring device of the invention is realized by the card format of existing device, it is more convenient.
Detailed description of the invention
Fig. 1 is the monitoring system schematic for taking into account arrester monitoring and electric energy quality monitoring of the invention；
Fig. 2 is the plug-in unit arrangement schematic diagram of monitoring device of the invention；
Fig. 3 is flow chart of data processing figure of the invention.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, to the present invention
It is described in further detail.
Take into account the monitoring system embodiment of arrester monitoring and electric energy quality monitoring
As shown in Figure 1, take into account the arrester monitoring and the monitoring system of electric energy quality monitoring of the present embodiment include leakage electricity
Flow acquisition module, power quality combiner, interchanger and monitoring device.
For acquiring leakage current of an arrester, punching is mounted on arrester ground line leakage current collection module, should
Leakage current collection module is equipped with fiber-optic output, and fiber-optic output is connected to the optical fiber interface of monitoring device by optical fiber.It lets out
Leakage current acquisition module can by the leakage current of an arrester of acquisition carry out analog-to-digital conversion, and by corresponding digital quantity signal according to
FT3 message format framing is transferred to monitoring device using fiber optic communication mode.Wherein, the sampling frequency of leakage current collection module
Rate can be set to 1.2KHz.
A voltage transformer and current transformer are respectively provided in each interval, for acquisition system voltage and system electricity
Stream, meanwhile, each interval is respectively correspondingly arranged a power quality combiner, measurement of the power quality combiner from voltage transformer
Coil access system voltage signal, while from the measuring coil access system current signal of current transformer.Power quality merges
Device carries out networking according to voltage class, and current-voltage information is transferred to interchanger with SV message mode, and by interchanger with network
Monitoring device is given in mode, to reduce the interface quantity of monitoring device.
Based on the system power of system voltage and current transformer acquisition of the monitoring device by being acquired according to voltage transformer
Calculation obtains electric energy quality monitoring parameter；It is also used to the leakage current of an arrester and system voltage for acquiring leakage current collection module
Acquisition module acquisition system voltage synchronize, and according to after synchronizing leakage current of an arrester and system voltage be calculated
Arrester monitoring parameters.Wherein, the sample frequency of power quality combiner is increased to 12.8KHz by conventional 4KHz.
Wherein, electric energy quality monitoring parameter includes that voltage effective value, current effective value, active power, reactive power, view exist
Power, power factor, voltage deviation, frequency departure, three-phase voltage, current unbalance factor etc.；Arrester monitoring parameters include complete
Electric current, current in resistance property and action frequency etc..
Monitoring device is designed using plug-in type, and plug-in unit arrangement schematic diagram is as shown in Figure 2.1# is power insert, 3# plug-in unit
For graphic interface plug-in unit, 6# plug-in unit is CPU card, and 7# is memory card, and 9# plug-in unit is FT3 plug-in unit, and A# plug-in unit is NPI plug-in unit,
C# plug-in unit is to output plug-in unit.Wherein, 9# plug-in unit receives the FT3 message that leakage current collection module is sent, and A# plug-in unit receives electric energy
The SV message that quality combiner is sent obtains system voltage signal and system power signal from network, and 6# plug-in unit is for analyzing
Calculate electric energy quality monitoring parameter and arrester monitoring parameters.
Based on above system, elaborate to entire workflow.
1, arrester ground line is opened, accesses leakage current collection module, sample frequency is set as 1.2KHz, signal warp
It crosses amplification and analog-to-digital conversion completes the acquisition of leakage current of an arrester, collected current signal is then extended into frame lattice with FT3
Formula carries out framing, is transferred to monitoring device using fiber optic communication mode.
2, the sample frequency of power quality combiner is increased to 12.8KHz by conventional 4KHz, from the survey of voltage transformer
It measures coil and obtains system voltage signal, while obtaining system power signal from the measuring coil of current transformer.
3, power quality combiner is transmitted in a manner of SV according to voltage class progress networking, current-voltage information in substation
To monitoring device.
4, according to the plug-in unit layout design monitoring device of above-mentioned introduction.Its flow chart of data processing is as shown in Figure 3.Monitoring device
The SV message sent on power quality combiner and leakage current collection module are received by different communication interfaces in synchronization
On the FT3 message that send, carry out packet parsing, parse system voltage and system power from SV message, parsed from FT3 message
Leakage current of an arrester out.Electric energy quality monitoring parameter is calculated according to system voltage and system power, meanwhile, it is let out with arrester
On the basis of leakage current, resampling is carried out to system voltage, to calculate arrester monitoring parameters, and calculated result is carried out
Output and storage.Wherein, voltage resampling can carry out in accordance with the following steps:
1) arrester resistance current calculating needs system voltage and leakage current of an arrester sample-synchronous, passes through the embodiment
In monitoring system obtain system voltage and leakage current of an arrester acquisition with transmission process in sample-synchronous time error Δ
t.It should be noted that sample-synchronous time error Δ t can be obtained according to many experiments, and the value is stored in monitoring device just
In subsequent processing and calculate.
2) due to the sampling period T of leakage current of an arresteriThan the sampling period T of system voltageuGreatly, therefore here with lightning-arrest
Resampling is carried out to system voltage on the basis of device leakage current.
If taking the arrester Leakage Current sample sequence { i an of cyclej+1,ij+2,…,ij+24Calculated as current in resistance property
Sample sequence, then in view of sample-synchronous time error Δ t be likely larger than 0 may also less than 0, system voltage sample sequence need
The cycle series for taking while acquiring, and extend forwardly and rearwardly half of cycle, i.e. { uj-127,…,uj+1,…,uj+256,…,
uj+256+128, with ij+1The position of corresponding system voltage point is n=Δ t/Tu, since n may not be integer, corresponding u is located at
uj+1+n,uj+1+n+1Between, the position of the corresponding system voltage point of all arrester Leakage Current sampled points can be written as m=(k*Ti+
Δt)/Tu(k=1 ..., 24), is removed and ij+1Outside corresponding system voltage point, remaining arrester Leakage Current point can use { uj+1+m,
uj+1+m+1,uj+1+m+2Carry out the calculating of parabola difference.
In addition, it should be noted that, the configuration quantity of power quality combiner is matched according to the specific requirement of concrete engineering
It sets, is not each power quality combiner access system voltage and system power simultaneously, the shape of power quality combiner
There are also access multiloop loop system electric currents for formula.In the system schema of each engineering, it is logical that voltage monitoring is configured according to main wiring diagram
Road meets the needs of system voltage monitoring, but will not repeat to monitor.
Take into account the monitoring device embodiment of arrester monitoring and electric energy quality monitoring
The function and structure of the monitoring device for taking into account arrester monitoring and electric energy quality monitoring of the embodiment, which are shown in take into account, keeps away
Monitoring system in the monitoring system of the monitoring of thunder device and electric energy quality monitoring, which is not described herein again.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of monitoring system for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that including at least one electric energy
Quality combiner, the corresponding line segregation of each power quality combiner, each power quality combiner pass through corresponding electricity
Current transformer acquisition system electric current also passes through corresponding voltage transformer acquisition system voltage；Power quality combiner exports SV
Digital interface of the message to monitoring device；
It further include leakage current collection module, the leakage current collection module is equipped with fiber-optic output, and fiber-optic output passes through
Optical fiber is connected to the optical fiber interface of the monitoring device；
The monitoring device includes processor and memory, and the processor is for executing instruction stored in memory with reality
Existing following method:
Receive the SV message that power quality combiner is sent and the fiber data message that leakage current collection module is sent；
SV message is parsed, system voltage and system power are obtained；Fiber data message is parsed, leakage current of an arrester is obtained；
According to system voltage and system power, electric energy quality monitoring parameter is calculated；
System voltage and leakage current of an arrester are synchronized, and according to synchronous system voltage and leakage current of an arrester,
Arrester monitoring parameters are calculated.
2. the monitoring system according to claim 1 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that institute
Stating fiber data message is FT3 message.
3. the monitoring system according to claim 1 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that
When system voltage and leakage current of an arrester are synchronized, weight is carried out to system voltage on the basis of leakage current of an arrester
Sampling realizes that system voltage is synchronous with leakage current of an arrester.
4. the monitoring system according to claim 1 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that when
There are two and the above number power quality combiner when, the output end of power quality combiner connects interchanger, interchanger company
Connect the monitoring device.
5. the monitoring system according to claim 2 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that institute
State monitoring device include power insert, graphic interface plug-in unit, CPU card, memory card, FT3 plug-in unit, NPI plug-in unit, output it is slotting
Part；Wherein, the FT3 plug-in unit is used to receive the FT3 message of leakage current collection module transmission, and the NPI plug-in unit is for receiving
The SV message that power quality combiner is sent, the processor and memory are arranged on the CPU card.
6. the monitoring system according to claim 1 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that institute
Leakage current collection module is stated to be mounted on arrester ground line.
7. a kind of monitoring device for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that including for receiving SV report
Literary digital interface and the optical fiber interface for reception optical fiber data message；It further include processor and memory, the processor
For executing instruction stored in memory to realize following method:
Receive the SV message that power quality combiner is sent and the fiber data message that leakage current collection module is sent；
SV message is parsed, system voltage and system power are obtained；Fiber data message is parsed, leakage current of an arrester is obtained；
According to system voltage and system power, electric energy quality monitoring parameter is calculated；
System voltage and leakage current of an arrester are synchronized, and according to synchronous system voltage and leakage current of an arrester,
Arrester monitoring parameters are calculated.
8. the monitoring device according to claim 7 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that institute
Stating fiber data message is FT3 message.
9. the monitoring device according to claim 7 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that
When system voltage and leakage current of an arrester are synchronized, weight is carried out to system voltage on the basis of leakage current of an arrester
Sampling realizes that system voltage is synchronous with leakage current of an arrester.
10. the monitoring device according to claim 8 for taking into account arrester monitoring and electric energy quality monitoring, which is characterized in that
The device further includes power insert, graphic interface plug-in unit, CPU card, memory card, FT3 plug-in unit, NPI plug-in unit, outputs plug-in unit；
Wherein, the FT3 plug-in unit is used to receive the FT3 message of leakage current collection module transmission, and the NPI plug-in unit is for receiving electric energy
The SV message that quality combiner is sent, the processor and memory are arranged on the CPU card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811222796.XA CN109298275B (en) | 2018-10-19 | 2018-10-19 | Monitoring system and device for monitoring lightning arrester and monitoring power quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811222796.XA CN109298275B (en) | 2018-10-19 | 2018-10-19 | Monitoring system and device for monitoring lightning arrester and monitoring power quality |
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| CN109298275A true CN109298275A (en) | 2019-02-01 |
| CN109298275B CN109298275B (en) | 2021-08-06 |
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| CN201811222796.XA Active CN109298275B (en) | 2018-10-19 | 2018-10-19 | Monitoring system and device for monitoring lightning arrester and monitoring power quality |
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Cited By (1)
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| WO2024092905A1 (en) * | 2022-11-03 | 2024-05-10 | 中车长春轨道客车股份有限公司 | High-voltage monitoring system |
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