CN110208620A - Loading tests device and loading tests system suitable for intelligent substation - Google Patents
Loading tests device and loading tests system suitable for intelligent substation Download PDFInfo
- Publication number
- CN110208620A CN110208620A CN201910486084.7A CN201910486084A CN110208620A CN 110208620 A CN110208620 A CN 110208620A CN 201910486084 A CN201910486084 A CN 201910486084A CN 110208620 A CN110208620 A CN 110208620A
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- voltage
- current
- loading tests
- under test
- intelligent substation
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
-
- 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
Abstract
It include data acquisition unit, control and arithmetic element, clock synchronization unit and wireless data communication module the present invention relates to a kind of loading tests device suitable for intelligent substation.Data acquisition unit is used to sample the voltage and current for obtaining equipment under test；Control and arithmetic element are used to obtain the amplitude and phase of the voltage and current of equipment under test；Clock synchronization unit for realizing data acquisition unit synchronized sampling；Wireless data communication module is used for transmission the amplitude and phase information of the voltage and current of equipment under test.A kind of loading tests system that can be suitable for intelligent substation, including several above-mentioned loading tests devices suitable for intelligent substation, wherein a loading tests device is set as host, remaining loading tests device is set as slave.The present invention can satisfy the demand that complete loading tests are carried out to intelligent substation, simplify loading tests work, it is ensured that test result is accurate and reliable.
Description
Technical field
The present invention relates to the loading tests fields of intelligent substation in electric system, and in particular to loading tests use
Device and system.
Background technique
Loading tests are to ensure secondary device electric current and voltage phase sequence, the correct important detection means of polarity, be it is newly-built and
The test job that improved substation must carry out when putting into operation is the premise that ensures power equipment and can be safely operated.With
Intelligent substation puts into operation being continuously increased of quantity, and puts forward new requirements to loading tests work, while bringing new ask
Topic and challenge.
As shown in Fig. 1, the operating mode of intelligent substation loading tests is at present: go to battery limits switch on the spot with
The amplitude and phase angle of voltage and current are measured on the basis of substation's station alternating voltage.This mode uses exchange as base using station
Standard, rather than equipment secondary voltage makees benchmark, there are certain errors.Meanwhile for the three-winding transformer of large-scale 220kV substation
Loading tests, 220KV, 110kV, 10kV equipment are located at different area and apart from far, and whens loading tests needs to take same
A voltage (substation uses alternating voltage in station) usually requires very long cable and the voltage is guided to different voltages as benchmark
The interval on the spot in grade equipment area, is inserted into loading tests instrument, clamps electric current with clamp on amperemeter, realizes loading tests,
Its loading tests requires as follows:
1) test needs four people to complete, wherein a people takes charge and guards, other three people carry out test job, and a people is responsible for behaviour
Make instrument, a people is responsible for wiring, and a people is responsible for recording result；
2) tester in order respectively measures the voltage and current amplitude and phase of 220kV, 110kV, 10kV in test.
3) voltage reference in test is derived from same voltage, guides to 220kV measurement point by cable, then guide to respectively
110kV measurement point and 10kV measurement point.
It can be seen that the device for carrying out loading tests to equipment in intelligent substation at present includes for guiding benchmark electric
The cable of pressure and common loading tests instrument.
Although above-mentioned loading tests mode and corollary apparatus can carry out electric current and voltage phase sequence to smart substation equipment
With polar check, but since the reference voltage of use and the reference voltage of physical device are inconsistent in phase, test is obtained
Voltage-current relationship can not entirely accurate reflection equipment under test voltage and electric current actual relationship, actual load function can not be calculated
Rate situation causes loading tests result sufficiently complete.Meanwhile it needing that reference voltage is guided to difference with cable in test process
Voltage class battery limits measure, and need longer cable even to need to be connected with more cables, operation element amount ratio
Larger and reliability is lower.In addition, according to the test process of this mode it is found that a people is needed to be responsible for wiring in test process
And ensure that wiring is firm, people's load operation tester, cannot as traditional substation wiring and operation tester same
It in equipment room septal area, can be completed by a people, operation is very inconvenient, and manpower and time consumption are all very big, is unable to satisfy " power transformation
The demand for development of O&M integration ＂.
Summary of the invention
It being capable of loading tests in simplified intelligent substation the object of the present invention is to provide one kind, it is ensured that test effect is accurate
Completely, and reduce needed for manpower loading tests device and system.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of loading tests device suitable for intelligent substation, it is negative for carrying out band to the equipment under test in intelligent substation
Lotus test, the loading tests device include:
Data acquisition unit, the data acquisition unit obtain the voltage and current of the equipment under test simultaneously for synchronized sampling
Export corresponding digital voltage signal and digital current signal；
Control and arithmetic element, the control and arithmetic element are for receiving and handling the digital voltage signal and the number
Current signal and respectively obtain the equipment under test voltage and current amplitude and phase；
Clock synchronization unit, the clock synchronization unit for realizing the data acquisition unit synchronized sampling.
Preferably, the data acquisition unit includes the voltage acquisition for the voltage for obtaining the equipment under test for sampling
Channel, the current acquisition channel for sampling and obtaining the electric current of the equipment under test.
Preferably, the voltage acquisition channel includes the voltage and voltage sense signal for detecting the equipment under test
Voltage tester probe converts the voltage detection signal in required voltage range and the voltage tune of output voltage conversion signal
Reason circuit carries out A/D conversion to the voltage conversion signal and exports the voltage A/D conversion circuit of the digital voltage signal；
The voltage tester probe is connected with the equipment under test, and the voltage conditioning circuit is connected with the voltage tester probe
It connects, the voltage A/D conversion circuit is connected with the voltage conditioning circuit；
The current acquisition channel includes the current detecting spy for detecting the electric current and output electric current measure signal of the equipment under test
Head converts the current detection signal in required current range and exporting the current regulating circuit, right of electric current conversion signal
The electric current conversion signal carries out A/D conversion and exports the electric current A/D conversion circuit of the digital current signal；The electric current inspection
Probing head is connected with the equipment under test, and the current regulating circuit is connected with current detecting probe, the electric current
A/D conversion circuit is connected with the current regulating circuit.
Preferably, the data acquisition unit further include the respectively described voltage tester probe, the voltage conditioning circuit,
The voltage A/D conversion circuit, current detecting probe, the power supply of the current regulating circuit, the electric current A/D conversion circuit
Power module.
Preferably, the control and arithmetic element include fpga chip, reception and place under the control of the PFGA chip
It manages the digital voltage signal and digital current signal and respectively obtains the amplitude and phase of the voltage and current of the equipment under test
The single-chip microcontroller of position.
Preferably, the control and arithmetic element further include being connected with the single-chip microcontroller and being used to show described be tested and set
The display module of the amplitude of standby voltage and current and phase, be connected with the single-chip microcontroller for inputting the input mould of parameter
Block.
Preferably, the clock synchronization unit includes several crystal oscillators or GPS adapter.
Preferably, the loading tests device further includes being connected with the control and arithmetic element and being used for transmission institute
State the amplitude of the voltage and current of equipment under test and the wireless data communication module of phase information.
Preferably, the communication module has the serial ports for connecting communication parameter setting apparatus.
A kind of loading tests system that can be suitable for intelligent substation, including several above-mentioned be suitable for intelligent power transformation
The loading tests device stood, wherein a loading tests device is set as host, remaining described loading tests dress
It installs and is set to slave, the slave transmits the amplitude and phase information of the voltage and current of the equipment under test to the host.
Due to the above technical solutions, the present invention has the following advantages over the prior art: the device of the invention can
To meet the needs of carrying out complete loading tests to intelligent substation, it can greatly simplify loading tests work, pass through
Ensure that voltage and current collected is all from equipment under test and ensures that test result is accurate and reliable, and system of the invention is then into one
The telework under complex environment may be implemented in step, reduces personnel depaly.
Detailed description of the invention
Attached drawing 1 is traditional loading tests scheme schematic diagram.
Attached drawing 2 is the hardware system functional block diagram of loading tests device of the invention.
Attached drawing 3 is current detecting functional block diagram in loading tests device of the invention.
Attached drawing 4 is voltage detecting functional block diagram in loading tests device of the invention.
Specific embodiment
The invention will be further described for embodiment shown in reference to the accompanying drawing.
Embodiment one: as shown in Fig. 2, a kind of for carrying out loading tests to the equipment under test in intelligent substation
Loading tests device, including data acquisition unit, control and arithmetic element and clock synchronization unit.
Data acquisition unit is connected with the secondary circuit of equipment under test, and the electricity of equipment under test is obtained for synchronized sampling
Pressure and electric current, and export corresponding digital voltage signal and digital current signal.The data acquisition unit includes two acquisition channels,
Respectively for sampling and the voltage acquisition channel for obtaining the voltage of equipment under test and the electricity for sampling and obtaining equipment under test
The current acquisition channel of stream.As shown in Fig. 4, voltage acquisition channel includes voltage and the output voltage detection for detecting equipment under test
The voltage tester probe of signal converts voltage detection signal in required voltage range and the voltage of output voltage conversion signal
Conditioning circuit carries out A/D conversion to voltage conversion signal and exports the voltage A/D conversion circuit of digital voltage signal.Voltage inspection
Probing head is connected with equipment under test, and voltage conditioning circuit is connected with voltage tester probe, voltage A/D conversion circuit and voltage
Conditioning circuit is connected.As shown in Fig. 3, current acquisition channel includes the electric current and output electric current measure letter for detecting equipment under test
Number current detecting probe, current detection signal converted in required current range and exporting the electric current tune of electric current conversion signal
Reason circuit carries out A/D conversion to electric current conversion signal and exports the electric current A/D conversion circuit of digital current signal.Current detecting
Probe is connected with equipment under test, and current regulating circuit is connected with current detecting probe, electric current A/D conversion circuit and electric current tune
Reason circuit is connected.
In data acquisition unit, voltage tester probe/current detecting probe is the interface for connecting equipment under test, will be electric
Pressure/current signal introduces test device；Measured voltage/current signal is passed through a system by voltage conditioning circuit/current regulating circuit
Rank transformation reaches in voltage A/D conversion circuit/electric current A/D conversion circuit conversion range, thus voltage A/D conversion electricity
Treated voltage conversion signal/electric current conversion signal by analog signal is converted to microprocessor by road/electric current A/D conversion circuit
The digital signal that can recognize and handle.
In addition, data acquisition unit further includes that respectively voltage tester probe, voltage conditioning circuit, voltage A/D conversion are electric
The power module that road, current detecting probe, current regulating circuit, electric current A/D conversion circuit are powered.
Control and arithmetic element respectively obtain tested for receiving and handling digital voltage signal and digital current signal
The amplitude and phase of the voltage and current of equipment.Control and arithmetic element mainly include fpga chip, in the control of PFGA chip
Lower reception and processing digital voltage signal and digital current signal, and respectively obtain the voltage and current of equipment under test amplitude and
The single-chip microcontroller (control CPU) of phase.Control and arithmetic element can also include being connected with single-chip microcontroller and being used to show tested set
The display module (such as liquid crystal display) of the amplitude of standby voltage and current and phase, be connected with single-chip microcontroller for inputting parameter
Input module (such as scanning keyboard), display module and input module can also be using the touch screens for having both the two function.
Single-chip microcontroller internal resource is abundant, A/D converter and liquid crystal drive SPI interface is carried, thus data acquisition unit
In voltage A/D conversion circuit/electric current A/D conversion circuit the A/D converter inside single-chip microcontroller can be directly used.In single-chip microcontroller
The size for the RAM that portion has can satisfy acquired data storage requirement, and timer interruption, which interrupts very convenient data with read/write, to be adopted
Collection and the communication between FPGA.There are three types of working methods for single-chip microcontroller tool: activity pattern, standby mode and close pattern make
It is extremely low to obtain its power consumption.
Clock synchronization unit for realizing data acquisition unit synchronized sampling, generally include several constant-temperature crystal oscillators or
GPS adapter connects data acquisition unit by single-chip microcontroller, to realize clock synchronizing function.
In addition, the loading tests device further includes the amplitude and phase letter for being used for transmission the voltage and current of equipment under test
The wireless data communication module of breath, the wireless data communication module are connected with control and arithmetic element.Communication module, which has, to be used
In the serial ports of connecting communication parameter setting apparatus.
Loading tests device based on this with wireless data communication module, it is a kind of to be suitable for intelligent substation
Loading tests system comprising several this there is the loading tests device of wireless data communication module, wherein a band
Load test device is set as host, remaining loading tests device is set as slave.Slave transmits equipment under test to host
The amplitude and phase information of voltage and current, so that each slave will correspond to the amplitude of the voltage and current of the equipment under test detected
It is sent to host with phase information, and is shown at host.
The process of loading tests is carried out using above-mentioned loading tests device are as follows:
(1) according to device configuration communications parameter.At the scene, data are carried out to device with the computer for having installed COM Debug Assistant
Write-in.It is powered on to device, Serial Port Line is turned by USB and connects device and computer, COM Debug Assistant is opened, by wanting
The setting for carrying out communications parameter is asked, serial ports is opened, then sets loading tests mode for device.
(2) voltage and current data acquisition with it is synchronous.Voltage needed for being obtained using voltage tester probe/current detecting probe/
Current data, and single-chip microcontroller is written.Synchronization signal is sent by wireless transmission simultaneously, is sent to time and address
Afterwards, and confirm synchronize after the phase data of voltage/current is written.After the completion, the successful information of phase-detection is received, this
Information is simultaneously on liquid crystal display.
(3) after confirmation voltage/current amplitude detected, phase information are errorless, from the result of machine testing by wirelessly passing
It is also shown on liquid crystal display after defeated.
(4) after to loading tests, on-load is judged according to the voltage/current phase difference information returned on display screen
Test is correct.
It is tested according to the functional requirement of the research and design of intelligent substation novel belt load tester, the system energy
Correctly automatically carry out loading tests work.The operability, agility of device have obtained well during the test
Verifying, substantially increases the working efficiency of loading tests operation.
It, can be effective according to the mode of wireless transmission loading tests device for being suitable for intelligent substation made of above scheme
Ground solve intelligent substation scene on-load detection in because on the secondary circuit of test equipment reference voltage be not easy obtain lead to reality
The voltage-current relationship that border measures can not entirely accurate reflection equipment under test voltage and electric current actual relationship, reference voltage passes through
Long cable transmission leads to the problem that operation element amount is larger and reliability is lower, and it is quasi- to greatly improve intelligent substation loading tests
True property shortens the loading tests time, improves work accuracy and efficiency.There is the device structure to design advantages of simple simultaneously,
It is easy to use, the advantages that reliable performance.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of loading tests device suitable for intelligent substation, for carrying out band to the equipment under test in intelligent substation
Road test, it is characterised in that: the loading tests device includes:
Data acquisition unit, the data acquisition unit obtain the voltage and current of the equipment under test simultaneously for synchronized sampling
Export corresponding digital voltage signal and digital current signal；
Control and arithmetic element, the control and arithmetic element are for receiving and handling the digital voltage signal and the number
Current signal and respectively obtain the equipment under test voltage and current amplitude and phase；
Clock synchronization unit, the clock synchronization unit for realizing the data acquisition unit synchronized sampling.
2. the loading tests device according to claim 1 suitable for intelligent substation, it is characterised in that: the data
Acquisition unit includes for sampling and described in obtaining the voltage acquisition channel of the voltage of the equipment under test, obtaining for sampling
The current acquisition channel of the electric current of equipment under test.
3. the loading tests device according to claim 2 suitable for intelligent substation, it is characterised in that: the voltage
Acquisition channel includes the voltage tester probe for the voltage and voltage sense signal for detecting the equipment under test, by the voltage
Detection signal is converted to the voltage conditioning circuit of output voltage conversion signal, converting in required voltage range and to the voltage and believe
It number carries out A/D conversion and exports the voltage A/D conversion circuit of the digital voltage signal；The voltage tester probe and the quilt
Measurement equipment is connected, and the voltage conditioning circuit is connected with the voltage tester probe, the voltage A/D conversion circuit and institute
Voltage conditioning circuit is stated to be connected；
The current acquisition channel includes the current detecting spy for detecting the electric current and output electric current measure signal of the equipment under test
Head converts the current detection signal in required current range and exporting the current regulating circuit, right of electric current conversion signal
The electric current conversion signal carries out A/D conversion and exports the electric current A/D conversion circuit of the digital current signal；The electric current inspection
Probing head is connected with the equipment under test, and the current regulating circuit is connected with current detecting probe, the electric current
A/D conversion circuit is connected with the current regulating circuit.
4. the loading tests device according to claim 3 suitable for intelligent substation, it is characterised in that: the data
Acquisition unit further includes the respectively described voltage tester probe, the voltage conditioning circuit, the voltage A/D conversion circuit, institute
State the power module of current detecting probe, the power supply of the current regulating circuit, the electric current A/D conversion circuit.
5. the loading tests device according to claim 1 suitable for intelligent substation, it is characterised in that: the control
And arithmetic element includes fpga chip, under the control of the PFGA chip receives and handle the digital voltage signal and number
Current signal and respectively obtain the equipment under test voltage and current amplitude and phase single-chip microcontroller.
6. the loading tests device according to claim 5 suitable for intelligent substation, it is characterised in that: the control
And arithmetic element further include the voltage and current for being connected with the single-chip microcontroller and being used to show the equipment under test amplitude and
The display module of phase, the input module for being used to input parameter being connected with the single-chip microcontroller.
7. the loading tests device according to claim 1 suitable for intelligent substation, it is characterised in that: the clock
Synchronization unit includes several crystal oscillators or GPS adapter.
8. the loading tests device according to any one of claim 1 to 7 suitable for intelligent substation, feature exist
In: the loading tests device further includes being connected with the control and arithmetic element and being used for transmission the equipment under test
The amplitude of voltage and current and the wireless data communication module of phase information.
9. the loading tests device according to claim 8 suitable for intelligent substation, it is characterised in that: the communication
Module has the serial ports for connecting communication parameter setting apparatus.
10. a kind of loading tests system suitable for intelligent substation, it is characterised in that: the loading tests system includes
Several loading tests devices as claimed in claim 8 for being suitable for intelligent substation a, wherein on-load is surveyed
Trial assembly, which installs, is set to host, remaining described loading tests device is set as slave, and the slave is to described in host transmission
The amplitude and phase information of the voltage and current of equipment under test.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486084.7A CN110208620A (en) | 2019-06-05 | 2019-06-05 | Loading tests device and loading tests system suitable for intelligent substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486084.7A CN110208620A (en) | 2019-06-05 | 2019-06-05 | Loading tests device and loading tests system suitable for intelligent substation |
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| CN110208620A true CN110208620A (en) | 2019-09-06 |
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| CN201910486084.7A Pending CN110208620A (en) | 2019-06-05 | 2019-06-05 | Loading tests device and loading tests system suitable for intelligent substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596147A (en) * | 2020-04-03 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Load test platform design based on 10kV charging station front stage |
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