CN109521235A - The complete accuracy checking method of one or two fusion switchgears of one kind and system - Google Patents
The complete accuracy checking method of one or two fusion switchgears of one kind and system Download PDFInfo
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- CN109521235A CN109521235A CN201811426919.1A CN201811426919A CN109521235A CN 109521235 A CN109521235 A CN 109521235A CN 201811426919 A CN201811426919 A CN 201811426919A CN 109521235 A CN109521235 A CN 109521235A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
It include: by standard electric signal loading in the mutual inductor primary side for being tested one or two fusion switchgears the invention discloses a kind of complete accuracy checking method of one or two fusion switchgears and system, the detection method；The mutual inductor secondary side electric signal is sent to the intelligent terminal of tested one or two fusion switchgears；The complete precision of tested one or two fusion switchgears is calculated according to the telemetry of intelligent terminal output.The detection system includes master station and standard electric signal generating apparatus.The present invention carries out complete accuracy detection using standard electric signal, standard electric signal is obtained according to preset instructions through signal processing, it can guarantee the high-precision and high stability of electric signal, in complete accuracy detection applied to one or two fusion switchgears, the accuracy of complete accuracy detection result is helped to improve, the requirement of one or two complete accuracy detections of fusion switchgear is met.
Description
Technical field
The invention belongs to distribution network technology fields, specifically, being related to a kind of complete precision inspection of one or two fusion switchgears
Survey method and system.
Background technique
One or two fusion switchgears be by Switch equipment and secondary voltage current transformer, state sensor and
The novel intelligent equipment that the equipment such as intelligent terminal are designed for uniformity, mutually merge and are formed, have measurement and transmission agency,
Fault detection and processing function, stabilization function, feeder automation function etc..
To guarantee one or two fusion switchgear reliabilities, primary essence should be carried out to one or two fusion switchgear assemblies
Degree detection (transformer precision detection), complete accuracy detection (switchgear ontology and terminal integral accuracy detection), ground connection event
Hinder the tests such as detection function test, transmission agency detection.
For above-mentioned each detection project, satisfactory detection system there is no at present.It is specific: one or two fusions are opened
The complete accuracy detection test for closing equipment, has that electric signal precision for detection is low, stability is bad, interferes with each other between circuit
The problem of, need to solve the problems, such as while generating high-precision, the high voltage of high stability, high current signal, and establish one or two times
Merge the detection method and system of switchgear assembly.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of one or two complete essences of fusion switchgear are provided
Detection method and system are spent, can be improved the accuracy of the complete accuracy detection result of one or two fusion switchgears.
In order to achieve the above objectives, the present invention adopts the following technical solutions:
In a first aspect, the present invention provides a kind of one or two complete accuracy checking methods of fusion switchgear, the method
Include:
By standard electric signal loading in the mutual inductor primary side for being tested one or two fusion switchgears；
The mutual inductor secondary side electric signal is sent to the intelligent terminal of tested one or two fusion switchgears；
The complete precision of tested one or two fusion switchgears is calculated according to the telemetry of intelligent terminal output.
With reference to first aspect, further, the acquisition methods of the standard electric signal include:
Electric signal preset instructions are converted into simulation input electric signal；
Processing and noise suppressed processing are amplified to simulation input electric signal, obtain simulation output electric signal；
Simulation output electric signal described in back production, and carry out PI link and adjust correction, so that simulation output electric signal is equal to standard
Electric signal.
With reference to first aspect, further, the acquisition methods of the simulation input electric signal include:
The electric signal preset instructions are decoded into numeral input electric signal；
The numeral input electric signal is converted into simulation input electric signal.
Second aspect, the present invention provides a kind of one or two complete precision detection systems of fusion switchgear, the systems
Include:
Standard electric signal generating apparatus: for being the mutual of tested one or two fusion switchgears according to electric signal preset instructions
Sensor primary side provides standard electric signal；
Master station: lower electrical signal preset instructions are used for, while for according to the intelligence for being tested one or two fusion switchgears
The telemetry of energy terminal output calculates the complete precision of tested one or two fusion switchgears.
In conjunction with second aspect, further, the standard electric signal generating apparatus includes:
Instruction converting unit: for electric signal preset instructions to be converted into simulation input electric signal；
Signal amplification unit: for amplifying processing and noise suppressed processing to simulation input electric signal, output is obtained
Electric signal；
Signal back production unit: it for simulation output electric signal described in back production, and carries out PI link and adjusts correction, make to simulate defeated
Electric signal is equal to standard electric signal out.
In conjunction with second aspect, further, described instruction converting unit includes:
DSP module: for electric signal preset instructions to be decoded into numeral input electric signal；
D/A conversion module: for the digital input signals to be converted into simulation input electric signal.
In conjunction with second aspect, further, the signal amplification unit includes:
Power amplifier: for carrying out first time enhanced processing and noise suppressed processing to simulation input electric signal；
Booster: the analog voltage signal for exporting to power amplifier carries out boosting again and handles, and it is defeated to obtain simulation
Voltage signal out；
Current lifting device: the analog current signal for exporting to power amplifier carries out up-flow again and handles, and it is defeated to obtain simulation
Current signal out.
In conjunction with second aspect, further, the signal back production unit includes:
Standard mutual inductor: for obtaining corresponding secondary electric signal using simulation output electric signal as an electric signal.
AD back production module: digital back production electricity is converted into for secondary electric signal described in back production, and by the secondary electric signal
Signal；
FPGA module: correction is adjusted for comparing numeral input electric signal and digital back production electric signal and carrying out PI link.
In conjunction with second aspect, further, the standard electric signal generating apparatus further includes mutually independent voltage output
Circuit and electric current output loop.
In conjunction with second aspect, further, the high-pressure side of the electric current output loop and the high-pressure side in voltage output circuit
Equipotential link.
To sum up, the complete accuracy checking method of one or two fusion switchgears provided by the invention and system, using standard electric
Signal carries out complete accuracy detection, and standard electric signal is obtained according to preset instructions through signal processing, can guarantee the height of electric signal
Precision and high stability in the complete accuracy detection applied to one or two fusion switchgears, help to improve complete precision inspection
The accuracy of result is surveyed, the requirement of one or two complete accuracy detections of fusion switchgear is met.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to use required in the embodiment of the present invention
Attached drawing be briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structural schematic diagram of tested one or two fusion switchgears；
Fig. 2 is a kind of structural frames of the complete precision detection system of one or two fusion switchgears provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of functional block diagram of standard electric signal generating apparatus provided in an embodiment of the present invention；
In figure: 1, Switch main body；2,3: voltage transformer；4, intelligent terminal；5, a connecting cable；6, secondary connection electricity
Cable.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
It should be appreciated that electric signal described in the embodiment of the present invention includes voltage signal and current signal.It is tested one or two times and melts
Combination switch equipment should include: Switch main body 1, voltage transformer 2,3,4, connecting cables 5 of intelligent terminal and secondary connection
Cable 6,1 built-in current mutual inductor of Switch main body are specific as shown in Figure 1.Wherein, Switch main body 1 has closure and cut-offs normal
The function of electric current and fault current, the secondary side of current transformer are wrapped on annular core and cover each phase in Switch main body 1
On, it flows through the primary current signal of Switch main body 1 for acquiring and is converted to secondary current signal, through the secondary of Switch main body 1
Connecting cable passes to intelligent terminal 4；The primary side of voltage transformer 2 is connected in parallel A, B phase connector of Switch main body 1, is used for
The acquisition alternate line voltage signal of A, B is simultaneously converted to secondary voltage signal, and the primary side of voltage transformer 3 is connected in parallel switch originally
B, C phase connector of body 1, for acquiring the alternate line voltage signal of B, C and being converted to secondary voltage signal；Secondary voltage signal warp
Secondary connecting cable passes to intelligent terminal 4；Intelligent terminal 4 has the function of data acquisition, control, protection etc..
As shown in Fig. 2, being a kind of complete precision detection system of one or two fusion switchgears provided in an embodiment of the present invention
Structural schematic diagram, the system can be used for the complete accuracy detection of one or two fusion switchgears, the system comprises:
Standard electric signal generating apparatus: for being the mutual of tested one or two fusion switchgears according to electric signal preset instructions
Sensor primary side provides standard electric signal；
Master station: lower electrical signal preset instructions are used for, while for according to the intelligence for being tested one or two fusion switchgears
The telemetry of energy terminal output calculates the complete precision of tested one or two fusion switchgears.
Wherein, standard electric signal generating apparatus includes:
Instruction converting unit: for electric signal preset instructions to be converted into simulation input electric signal；
Signal amplification unit: for amplifying processing and noise suppressed processing to simulation input electric signal, output is obtained
Electric signal；
Signal back production unit: it for simulation output electric signal described in back production, and carries out PI link and adjusts correction, make to simulate defeated
Electric signal is equal to standard electric signal out.
Wherein, instruction converting unit includes:
DSP module: specific: can be by industrial personal computer for electric signal preset instructions to be decoded into numeral input electric signal
The signal that master station issues is received, voltage, electric current preset instructions are generated and is forwarded to DSP module, DSP module is used for voltage is pre-
If Instruction decoding is decoded into digital input signal signal at numeral input voltage signal, by electric current preset instructions；
D/A conversion module: specific: will be digital for the numeral input electric signal to be converted into simulation input electric signal
Input voltage signal is converted to analog input voltage signal, and digital input signal signal is converted to simulation input current signal,
Purpose is easy for subsequent enhanced processing, to obtain high voltage, high current signal.
Wherein, signal amplification unit can carry out enhanced processing twice to simulation input electric signal, with obtain high voltage and
High current signal, specifically includes:
Power amplifier: for simulation input electric signal is amplified and noise suppressed processing；Power amplifier simultaneously
With the function of smooth adjustment, to improve the precision of simulation output electric signal；
Booster: the analog voltage signal for exporting to power amplifier carries out boosting processing, obtains analog electrical output
Press signal；
Current lifting device: the analog current signal for exporting to power amplifier carries out up-flow processing, obtains analog electrical output
Flow signal.
Wherein, signal back production unit can carry out feedback and correction processing to simulation output electric signal, it is ensured that simulation
Output electric signal is standard electric signal, is specifically included:
Standard mutual inductor: for obtaining corresponding secondary electric signal using simulation output electric signal as an electric signal；
AD back production module: digital back production electricity is converted into for secondary electric signal described in back production, and by the secondary electric signal
Signal；
FPGA module: correction is adjusted for comparing numeral input electric signal and digital back production electric signal and carrying out PI link.
Standard mutual inductor includes standard potential transformer and standard current transformer, and standard potential transformer and booster are total
With a set of iron core, standard current transformer and current lifting device share a set of iron core.Standard mutual inductor coil using equiblibrium mass distribution formula around
System, internal encapsulating is to reduce partial discharge, precision 0.02%.
Below for generating 10kV normal voltage, to the worked of Plays electric signal generating means of the embodiment of the present invention
Journey is described in further detail, as shown in Figure 3:
By DSP module by 10kV normal voltage preset instructions signal interpretation at digital input signals u* (n)；
Digital input signals u* (n) and number back production signal u (n) are compared by FPGA module, obtain comparison signal △ u (n)
=u*(n)-u (n), and be corrected by PI link；
Analog input signal u* (t) is converted by PI link output signal by D/A conversion module；
By power amplifier by analog input signal u* (t) carry out for the first time boosting atPower amplifier is simultaneous simultaneously
There is the function of noise suppressed and smooth adjustment, the stability and accuracy of output signal can be promoted；
It will by boosterIt carries out boosting to export as analog output voltage U (t) to one or two times to be measured for the second time merging
Switch；
The error and noise introduced due to each link of signal transmission loop, so that U (t) deviates 10kV voltage, to make to simulate
Output voltage U (t) has high-precision and high stability, is introduced and is fed back by signal back production unit, dropped by standard potential transformer
After pressure processing, then by A/D back production module converter it is number back production signal u (n), and inputs FPGA.
If by external interference cause between U (t) and 10kV generate be more than 0.05% error, made by signal back production unit
At u* (n) ≠ u (n), PI link will persistently adjust until u* (n)=u (n), considers that the precision of signal back production unit, the present invention are real
Applying example may insure that analog output voltage U (t) and voltage preset instructions require error between the 10kV of output to be no more than 0.05%.
In order to solve the technical issues of interfering with each other between output loop, standard electric signal provided in an embodiment of the present invention is generated
Device is provided with mutually independent voltage output circuit and electric current output loop.The voltage output circuit includes that two groups of two-phases are defeated
Terminal out, the electric current output loop include two groups of three-phase output end.The high-pressure side of electric current output loop and voltage output are returned
The high-pressure side on road carries out equipotential link, so that integrally high potential is presented in electric current output loop over the ground, to realize while provide
The experimental enviroment of high voltage and high current.
When carrying out accuracy detection to one or two fusion switchgears, two groups of three-phase output end point of electric current output loop
It is not connect with the three-phase terminal of Switch main body two sides；One group of two phase output terminals and standard electric signal in voltage output circuit generate
The shell of device is grounded jointly, and another group of two phase output terminals merge the voltage transformer of switchgear with tested one or two times respectively
2 or 3 one end connection, the other end ground connection of voltage transformer 2 or 3.
To sum up, the complete precision detection system of one or two fusion switchgears provided in an embodiment of the present invention, devises one kind
Standard electric signal generating apparatus, for generating the standard electric signal for being used for one or two complete accuracy detections of fusion switchgear, energy
Enough high-precisions and high stability for guaranteeing detection electric signal, help to improve the accuracy of complete accuracy detection result, meet
The requirement of one or two complete accuracy detections of fusion switchgear.
The complete accuracy checking method of one or two fusion switchgears provided in an embodiment of the present invention, can using it is above-mentioned at
It covers precision detection system to execute, include the following steps:
Step 1: by standard electric signal loading in the mutual inductor primary side for being tested one or two fusion switchgears；The mark
Quasi- electric signal can be obtained using standard electric signal generating apparatus above-mentioned, and acquisition methods include:
S110: electric signal preset instructions are converted into simulation input electric signal；
Further, the method for acquisition simulation input electric signal includes:
S110a: the electric signal preset instructions are decoded into numeral input electric signal；
S110b: the numeral input electric signal is converted into simulation input electric signal.
S120: processing is amplified to simulation input electric signal and noise suppressed is handled, obtains simulation output electric signal；
S130: simulation output electric signal described in back production, and carry out PI link and adjust correction, it is equal to simulation output electric signal
Standard electric signal.
Step 2: the mutual inductor secondary side electric signal is sent to the intelligence of tested one or two fusion switchgears eventually
End；
Step 3: the complete essence of tested one or two fusion switchgears is calculated according to the telemetry of intelligent terminal output
Degree.
Be explained in detail below using complete precision detection system provided in an embodiment of the present invention to one or two fusion switchgears into
The method of the complete accuracy detection of row:
Testing requirements: the normal voltage of one or two fusion switchgear voltage transformer primary sides of access is 10kV, access
The normalized current of one or two fusion switchgear current transformer primary sides is 600A；
Relevant parameter: the default load 75VA of the voltage transformer to be measured of one or two fusion switchgears, built-in current mutual inductance
Device 0.5 Ω of default load,(advanced).
Environmental structure: two groups of three-phase terminals of the electric current output loop of standard electric signal generating apparatus are connect respectively and are being switched
On the three-phase terminal of ontology two sides, the shell of one group of two phase output terminals and standard electric signal generating apparatus in voltage output circuit
Common ground connection, another group of two phase output terminals merge the primary side of voltage transformer 2 and 3 of switchgear with tested one or two times respectively
One end connection, the primary side of voltage transformer 2 and 3 the other end ground connection.
The secondary terminals of voltage transformer 2 and 3 and Switch main body of one or two fusion devices pass through secondary connecting cable 6 and connect
Intelligent terminal 4 is connect, is communicated between intelligent terminal 4 and master station by 104 specifications.
From master station to electrical signal preset instructions under standard electric signal generating apparatus, including primary voltage preset instructions
10kV, primary current preset instructions 600A；
It is primary that standard electric signal generating apparatus receives electric signal preset instructions output 10kV standard primary voltage, 600A standard
Electric current.It is by voltage output circuit that the load of 10kV standard primary voltage is primary in one or two fusion switching voltage mutual inductors 2 and 3
It is by electric current output loop that the load of 600A standard primary current is mutual in one or two fusion Switch main bodies and its built-in current on side
On sensor.The secondary side of voltage transformer 2 and 3 and built-in current mutual inductor secondary side by secondary connecting cable 6 by secondary voltage,
Secondary current passes to intelligent terminal 4；Telemetering voltage u is calculated according to secondary voltage, secondary current sampling in intelligent terminal 4,
Telemetering electric current i, and by giving master station in 104 specifications.After master station reads telemetering voltage, current data, obtained by calculating
The complete precision of one or two fusion switchgears.Specific: assuming that master station predeterminated voltage signal is U, predetermined current signal is
I, standard secondary voltage is 100V, standard secondary current is 1A, by the telemetering voltage u of intelligent terminal 4 can be calculated voltage at
Cover trueness error are as follows:It can be calculated the complete precision of electric current by the telemetering electric current i (n) of intelligent terminal
Error are as follows:
To sum up, the complete accuracy checking method of one or two fusion switchgears provided in an embodiment of the present invention, using standard electric
Detection electric signal of the signal as one or two fusion switchgears, can guarantee the high-precision and high stable of detection electric signal
Property, the accuracy of complete accuracy detection result is helped to improve, wanting for one or two complete accuracy detections of fusion switchgear is met
It asks.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of one or two complete accuracy checking methods of fusion switchgear, which is characterized in that the described method includes:
By standard electric signal loading in the mutual inductor primary side for being tested one or two fusion switchgears；
The mutual inductor secondary side electric signal is sent to the intelligent terminal of tested one or two fusion switchgears；
The complete precision of tested one or two fusion switchgears is calculated according to the telemetry of intelligent terminal output.
2. the complete accuracy checking method of one or two fusion switchgears according to claim 1, which is characterized in that the mark
The acquisition methods of quasi- electric signal include:
Electric signal preset instructions are converted into simulation input electric signal；
Processing and noise suppressed processing are amplified to simulation input electric signal, obtain simulation output electric signal；
Simulation output electric signal described in back production, and carry out PI link and adjust correction, so that simulation output electric signal is equal to standard telecommunications
Number.
3. the complete accuracy checking method of one or two fusion switchgears according to claim 2, which is characterized in that the mould
The acquisition methods of quasi- input electrical signal include:
The electric signal preset instructions are decoded into numeral input electric signal；
The numeral input electric signal is converted into simulation input electric signal.
4. a kind of one or two complete precision detection systems of fusion switchgear, which is characterized in that the system comprises:
Standard electric signal generating apparatus: for being the mutual inductor of tested one or two fusion switchgears according to electric signal preset instructions
Primary side provides standard electric signal；
Master station: lower electrical signal preset instructions are used for, while the intelligence for tested one or the two fusion switchgears of basis to be eventually
The telemetry of end output calculates the complete precision of tested one or two fusion switchgears.
5. the complete precision detection system of one or two fusion switchgears according to claim 4, which is characterized in that the mark
Quasi- electric signal generating means include:
Instruction converting unit: for electric signal preset instructions to be converted into simulation input electric signal；
Signal amplification unit: for amplifying processing and noise suppressed processing to simulation input electric signal, simulation output is obtained
Electric signal；
Signal back production unit: it for simulation output electric signal described in back production, and carries out PI link and adjusts correction, make analog electrical output
Signal is equal to standard electric signal.
6. the complete precision detection system of one or two fusion switchgears according to claim 5, which is characterized in that the finger
The converting unit is enabled to include:
DSP module: for electric signal preset instructions to be decoded into numeral input electric signal；
D/A conversion module: for the digital input signals to be converted into simulation input electric signal.
7. the complete precision detection system of one or two fusion switchgears according to claim 6, which is characterized in that the letter
Number back production unit includes:
Standard mutual inductor: for obtaining corresponding secondary electric signal using simulation output electric signal as an electric signal；
AD back production module: for secondary electric signal described in back production, and the secondary electric signal is converted into digital back production electric signal；
FPGA module: correction is adjusted for comparing numeral input electric signal and digital back production electric signal and carrying out PI link.
8. the complete precision detection system of one or two fusion switchgears according to claim 5, which is characterized in that the letter
Number amplifying unit includes:
Power amplifier: for carrying out first time enhanced processing and noise suppressed processing to simulation input electric signal；
Booster: the analog voltage signal for exporting to power amplifier carries out boosting again and handles, and obtains analog electrical output
Press signal；
And/or
Current lifting device: the analog current signal for exporting to power amplifier carries out up-flow again and handles, and obtains analog electrical output
Flow signal.
9. the complete precision detection system of one or two fusion switchgears according to claim 4, which is characterized in that the mark
Quasi- electric signal generating means further include mutually independent voltage output circuit and electric current output loop.
10. the complete precision detection system of one or two fusion switchgears according to claim 9, which is characterized in that described
The high-pressure side of electric current output loop and the high-pressure side equipotential link in voltage output circuit.
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| CN110780221A (en) * | 2019-11-19 | 2020-02-11 | 国网湖北省电力有限公司电力科学研究院 | Electrical measurement system for source end of circuit breaker on primary and secondary fusion complete set of column |
| CN110824204A (en) * | 2019-11-25 | 2020-02-21 | 国网江苏省电力有限公司电力科学研究院 | Integrated access device convenient for assembling one-time and two-time integrated complete switch test equipment |
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| CN114089064A (en) * | 2021-11-16 | 2022-02-25 | 许昌许继软件技术有限公司 | Accuracy diagnosis method and system for complete set of switch equipment and control equipment |
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| CN110780256A (en) * | 2019-11-19 | 2020-02-11 | 国网湖北省电力有限公司电力科学研究院 | System and method for detecting accuracy of circuit breaker on primary and secondary fusion complete set of columns |
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| CN111044831A (en) * | 2019-12-31 | 2020-04-21 | 珠海博威智能电网有限公司 | Detection system based on primary and secondary fusion power distribution equipment |
| CN111398802A (en) * | 2020-03-31 | 2020-07-10 | 南瑞智能配电技术有限公司 | Primary and secondary equipment fusion 10kV power distribution switch accuracy detection system and detection method |
| CN112379252A (en) * | 2020-11-03 | 2021-02-19 | 南方电网数字电网研究院有限公司 | Primary and secondary fusion pole switch test system |
| CN112379252B (en) * | 2020-11-03 | 2021-07-06 | 南方电网数字电网研究院有限公司 | Primary and secondary fusion pole switch test system |
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