CN110018394A - One kind being directed to distribution bus PT signal characteristic measurement system, method and substation - Google Patents
One kind being directed to distribution bus PT signal characteristic measurement system, method and substation Download PDFInfo
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- CN110018394A CN110018394A CN201910326485.6A CN201910326485A CN110018394A CN 110018394 A CN110018394 A CN 110018394A CN 201910326485 A CN201910326485 A CN 201910326485A CN 110018394 A CN110018394 A CN 110018394A
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- signal
- distribution bus
- logic device
- programmable logic
- measurement system
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to one kind to be directed to distribution bus PT signal characteristic measurement system, method and substation, belong to power system automation technology field, comprising: multiple analog-digital converters are synchronized with programmable logic device, sram cache module, multiple distribution bus PT signal devices and the trigger module of control；Each distribution bus PT signal device passes sequentially through and carries out data interaction with the I/O terminal of programmable logic device after signal conditioning module, analog-digital converter；Communication port is provided on the I/O terminal of programmable logic device；Trigger module and the I/O terminal of programmable logic device carry out data interaction.The present invention triggers synchronous acquisition by uniform external synchronous triggering signal, realizes high-precise synchronization acquisition between multichannel bus PT signal.Acquisition standard is obviously improved, it can be achieved that sampling to the every cycle of power distribution network up to 20,000 voltage waveforms.Meet the data precision requirement that the new period measures distribution bus operating status.
Description
Technical field
The invention belongs to power system automation technology fields, and in particular to one kind is directed to distribution bus PT signal characteristic amount
Examining system, method and substation.
Background technique
In recent years, as urban power distribution network complexity rises year by year, the difficulty of low-voltage network safe and stable operation also day
Benefit increases.As ultra-high voltage transformer station puts into operation, wind-force, photo-voltaic power generation station are grid-connected etc., combined factors influence.The electricity of low-voltage network
Power source is increasingly complicated, how to become major issue to the more efficient monitoring management of low-voltage network.(power grid is same by current PMU
Walk phasor measurement unit) by the operation application of many years, have accumulated a set of mature and stable application theory, but PMU standard
Braking time is too early, low to electric network data acquisition precision, can not effectively eliminate to error of frequency mixing, it is low can not to solve power distribution network
Frequency vibration swings, interference of the high-frequency harmonic to data processing.
Summary of the invention
The present invention is to solve technical problem present in well-known technique to develop one kind herein for the above problem and be directed to
Distribution bus PT signal characteristic measurement system, method and substation should be directed to distribution bus PT signal characteristic measurement system, method
And substation triggers synchronous acquisition by uniform external synchronous triggering signal, realizes that high-precision is same between multichannel bus PT signal
Step acquisition.Acquisition standard is obviously improved, it can be achieved that sampling to the every cycle of power distribution network up to 20,000 voltage waveforms.Meet the new period
The data precision requirement that distribution bus operating status is measured.
The first object of the present invention is to provide one kind for distribution bus PT signal characteristic measurement system, includes at least:
Multiple analog-digital converters are synchronized with the programmable logic device of control；
The sram cache module of data interaction is carried out with above-mentioned programmable logic device；
Multiple distribution bus PT signal devices；
And trigger module；Wherein:
Each distribution bus PT signal device pass sequentially through after signal conditioning module, analog-digital converter with programmable logic device
The I/O terminal of part carries out data interaction；Communication port is provided on the I/O terminal of above-mentioned programmable logic device；Above-mentioned touching
The I/O terminal for sending out module and programmable logic device carries out data interaction.
Further, above-mentioned programmable logic device uses ALTERA company fpga chip.
The second object of the present invention is to provide a kind of method for distribution bus PT signal characteristic measurement system, at least wraps
Include following steps:
Step 1: programmable logic device carries out self-test to sram cache module, analog-digital converter, initialization is completed；
Step 2: being in standby for distribution bus PT signal characteristic measurement system, outer triggering signal pair is waited
Collection process starting；
When external trigger detects effective edge edge, the signal on access bus PT terminal is carried out with configuration parameter immediately fast
Fast synchronous data collection, it is synchronous to obtain site voltage signal acquisition value in bus ABC three-phase PT voltage signal and N phase, and by suitable
Sequence is temporarily stored into device sram cache；
Step 3: notifying the data of the external device processes collection process by communication interface.
Further, above-mentioned programmable logic device uses ALTERA company fpga chip.
Further, trigger process uses LVDS signal edging trigger.
The third object of the present invention is to provide a kind of using the above-mentioned change for distribution bus PT signal characteristic measurement system
Power station.
The advantages and positive effects of the present invention are:
The present invention is directed to distribution feature, can be carried out promotion to the scalability of original major network PMU equipment, and reinforce emphatically more
The synchronous acquisition performance of road bus PT signal meets the required precision measured to distribution multistation, multiple signals operation data, auxiliary
Promote distribution overall operation management level.
Invention significant beneficial effect include:
1, it is triggered by LVDS edge synchronization, realizes the signal high precision synchronous data collection of power distribution network multichannel bus；
2, it is directed to distribution feature, 20,000 points are promoted to existing every cycle sampling number, it is obvious to measure performance standard upgrading；
3, scheme function is compact complete, convenient existing in fortune state substation distribution measuring equipment, transformation applied to being transformed
It is at low cost.
Detailed description of the invention
Fig. 1 is the system block diagram that the present invention is preferably implemented；
Fig. 2 is that the present invention preferably is implemented in the system block diagram applied in Dan Zhan substation；
Fig. 3 is that the present invention preferably is implemented in the system block diagram applied in multistation substation；
Fig. 4 is the actual waveform figure that present invention preferred implementation acquires bus.
Specific embodiment
The invention will be further described with reference to the accompanying drawing and by specific embodiment, and following embodiment is descriptive
, it is not restrictive, this does not limit the scope of protection of the present invention.
Please refer to Fig. 1:
Herein for the above problem, develop a kind of for distribution bus PT signal characteristic measurement system, comprising:
Multiple analog-digital converters are synchronized with the programmable logic device of control；
The sram cache module of data interaction is carried out with above-mentioned programmable logic device；
Multiple distribution bus PT signal devices；
And trigger module；Wherein:
Each distribution bus PT signal device pass sequentially through after signal conditioning module, analog-digital converter with programmable logic device
The I/O terminal of part carries out data interaction；Communication port is provided on the I/O terminal of above-mentioned programmable logic device；Above-mentioned touching
The I/O terminal for sending out module and programmable logic device carries out data interaction.
A method of for distribution bus PT signal characteristic measurement system, include the following steps:
(1) using programmable logic device (ALTERA company Cyclone IV series) to multiple analog-digital converters (ADC) into
Row synchronously control, by VHDL language design in be directed to Multi-path synchronous rule constraint, ensure multi-channel A/D C driving signal synchronization
Property.
(2) it caches using high-speed SRAM as acquisition device, is connected on FPGA by parallel memory bus, realize number
According to pooling feature.During carrying out measuring signal, data are kept in wherein, and external equipment is waited to be read out it,
Prevent data from overflowing.
(3) starting measurement process uses LVDS signal edging trigger, when detecting significant level edge transition, starting letter
Number measure.
(4) external communication interface can carry out data interaction communication and function with external equipment by buses such as USB, networks
Control.
The collection process that the present invention designs is as follows:
(1) FPGA carries out self-test to functional modules such as SRAM, ADC automatically after measurement system starting, completes initialization.
(2) system is in standby, and outer triggering signal is waited to start collection process.
(3) external trigger detects effective edge edge, is carried out immediately with configuration parameter to the signal on access bus PT terminal
The acquisition of Fast synchronization data, it is synchronous to obtain site voltage signal acquisition value in bus ABC three-phase PT voltage signal and N phase, and press
Sequence is temporarily stored into device sram cache.
(4) data of the external device processes collection process are notified by communication interface.Device terminates this acquisition simultaneously
Process, and be ready for triggering next time.
The present invention applies above system by installing additional on original substation's median generatrix PT signal, realizes to matching in substation
The high-precise synchronization sampled measurements of net multichannel bus PT signal.This method application high-precision adc (ADC) and programmable
Logical device (FPGA) combines, and realization reaches every 20,000 point sampling of cycle to distribution bus PT signal.And synchronization accuracy can be with
Reach 0.1 microsecond.It is obvious to the acquisition standard upgrading of existing every 100 to 500 point of cycle.To reach the new period to distribution bus
The required precision that PT signal operation data measures, service hoisting distribution overall operation management level.
In Fig. 1, major control element of the FPGA as device, to the sram cache in device, ADC analog-digital converter,
Trigger, communication interface are controlled.In specific implementation, FPGA realization device logic function needs about 22K logical block (LE), this
Inventive method can be designed to be realized using the medium-scale chip of ALTERA company Cyclone IV.Since acquisition standard need to reach weekly
20,000 points of wave, therefore the method for the present invention should have 1MHz or more sample rate using SAR type ADC, ADC performance requirement, 16 with up-sampling
Precision.The PERCOM peripheral communication method mentioned in method includes but is not limited to the communication interfaces such as USB, network.The listed present invention in Fig. 1
Method main functional modules and its mutual communication control relationship.
In the embodiment depicted in figure 2, the method for the present invention needs and power distribution network bus PT signal realizes that data synchronize height in inbound
Precision acquisition.Signal processing module is accessed behind each acquisition device, real time data processing and analysis are carried out to the data of acquisition.
And by data summarization to visualization processing terminal in station.Visualization processing terminal is by integrating multichannel metric data
Processing and analysis, are shown in a manner of intuitive data icon, and by telecontrol channel in standing, measurement result is uploaded to far
Fang Jinhang data handling utility.The three road bus synchronous measure applications that embodiment illustrated in fig. 2 is indicated are not limited to, it can be according in station
Concrete condition is flexibly increased and decreased bus PT measuring signal device according to distribution bus actual number.It realizes in the state of throwing
The distribution bus PT signal acquisition scheme upgrading of substation.
In the embodiment shown in fig. 3, method for measurement of the invention is illustrated in multi-Substation application.Multistation application
When, by the way that metric data is linked into the telecontrol device of substation.By Telecontrol Protocol, by high-precise synchronization metric data and tentatively
Calculated result is uploaded.Meanwhile after main website side telecontrol device receives the high-precise synchronization metric data that substation uploads, by each substation
Data summarization is simultaneously supplied to main website data operation machine and is further processed.Data are shown and are answered in dispatching desk terminal
With.
It as shown in Figure 4, is application method for measurement of the invention to substation's distribution bus PT signal actual measured results
It shows.
Although disclosing the embodiment of the present invention and attached drawing for the purpose of illustration, those skilled in the art can be managed
Solution: do not departing from the present invention and spirit and scope of the appended claims in, various substitutions, changes and modifications be all it is possible,
Therefore, the scope of the present invention is not limited to the embodiment and attached drawing disclosure of that.
Claims (6)
1. one kind is directed to distribution bus PT signal characteristic measurement system, which is characterized in that include at least:
Multiple analog-digital converters are synchronized with the programmable logic device of control；
The sram cache module of data interaction is carried out with above-mentioned programmable logic device；
Multiple distribution bus PT signal devices；
And trigger module；Wherein:
Each distribution bus PT signal device pass sequentially through after signal conditioning module, analog-digital converter with programmable logic device
I/O terminal carries out data interaction；Communication port is provided on the I/O terminal of above-mentioned programmable logic device；Above-mentioned trigger mode
Block and the I/O terminal of programmable logic device carry out data interaction.
2. being directed to distribution bus PT signal characteristic measurement system according to claim 1, it is characterised in that: above-mentioned may be programmed is patrolled
It collects device and uses ALTERA company fpga chip.
3. a kind of based on the method for being directed to distribution bus PT signal characteristic measurement system described in claim 1, it is characterised in that: extremely
Include the following steps: less
Step 1: programmable logic device carries out self-test to sram cache module, analog-digital converter, initialization is completed；
Step 2: being in standby for distribution bus PT signal characteristic measurement system, wait outer triggering signal to acquisition
Process starting；
When external trigger detects effective edge edge, the signal on access bus PT terminal is carried out with configuration parameter immediately quickly same
Step data acquisition, it is synchronous to obtain site voltage signal acquisition value in bus ABC three-phase PT voltage signal and N phase, and in order temporarily
It is stored in device sram cache；
Step 3: notifying the data of the external device processes collection process by communication interface.
4. according to claim 3 be directed to distribution bus PT signal characteristic measurement system method, it is characterised in that: it is above-mentioned can
Programmed logic device uses ALTERA company fpga chip.
5. being directed to the method for distribution bus PT signal characteristic measurement system according to claim 3, it is characterised in that: triggered
Cheng Caiyong LVDS signal edging trigger.
6. a kind of using the substation for being directed to distribution bus PT signal characteristic measurement system described in the claims 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326485.6A CN110018394A (en) | 2019-04-23 | 2019-04-23 | One kind being directed to distribution bus PT signal characteristic measurement system, method and substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326485.6A CN110018394A (en) | 2019-04-23 | 2019-04-23 | One kind being directed to distribution bus PT signal characteristic measurement system, method and substation |
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| Publication Number | Publication Date |
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| CN110018394A true CN110018394A (en) | 2019-07-16 |
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ID=67192199
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| CN201910326485.6A Pending CN110018394A (en) | 2019-04-23 | 2019-04-23 | One kind being directed to distribution bus PT signal characteristic measurement system, method and substation |
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Citations (5)
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| CN201477162U (en) * | 2009-06-23 | 2010-05-19 | 西安工程大学 | Capacitive device medium loss angle online monitoring device |
| US8168315B1 (en) * | 2011-08-23 | 2012-05-01 | Tesla Motors, Inc. | Method for detecting battery thermal events via battery pack isolation monitoring |
| CN205404682U (en) * | 2015-12-23 | 2016-07-27 | 北京榕科电气有限公司 | Wireless phase synchronization device |
| CN209086325U (en) * | 2018-11-02 | 2019-07-09 | 国网河南省电力公司济源供电公司 | Power distribution network bus PT signal synchronous collection device |
-
2019
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| CN201130242Y (en) * | 2007-12-14 | 2008-10-08 | 大庆供电电器设备有限公司 | Apparatus for real-time measurement of AC motor transient performance |
| CN201477162U (en) * | 2009-06-23 | 2010-05-19 | 西安工程大学 | Capacitive device medium loss angle online monitoring device |
| US8168315B1 (en) * | 2011-08-23 | 2012-05-01 | Tesla Motors, Inc. | Method for detecting battery thermal events via battery pack isolation monitoring |
| CN205404682U (en) * | 2015-12-23 | 2016-07-27 | 北京榕科电气有限公司 | Wireless phase synchronization device |
| CN209086325U (en) * | 2018-11-02 | 2019-07-09 | 国网河南省电力公司济源供电公司 | Power distribution network bus PT signal synchronous collection device |
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Application publication date: 20190716 |