CN110456123A - A kind of wideband transient voltage partial pressure measuring apparatus and method - Google Patents
A kind of wideband transient voltage partial pressure measuring apparatus and method Download PDFInfo
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- CN110456123A CN110456123A CN201910717695.8A CN201910717695A CN110456123A CN 110456123 A CN110456123 A CN 110456123A CN 201910717695 A CN201910717695 A CN 201910717695A CN 110456123 A CN110456123 A CN 110456123A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a kind of wideband transient voltage partial pressure measuring apparatus and methods, described device includes high pressure arm unit, the high pressure arm unit is used to that the test line high voltage to be divided to obtain partial pressure low-voltage, and the partial pressure low-voltage is sent to the low pressure arm unit；Low pressure arm unit, the low pressure arm unit are used to the partial pressure low-voltage being sent to the wideband transient measuring unit；Wideband transient measuring unit, the wideband transient measuring unit is used to measure the partial pressure low-voltage that the low pressure arm unit is sent, and determines the test line high voltage according to the partial pressure low-voltage and intrinsic standoff ratio；Described device carries out plural serial stage using low inductance ceramic capacitor and noninductive resistance, can directly be articulated to real-time measurement circuit-under-test high voltage on transmission line of electricity；The amplitude that described device can measure voltage is high, bandwidth and is affected by the external environment small；The true waveform that can determine overvoltage, is of great significance to the safe and stable operation of transmission line of electricity.
Description
Technical field
The present invention relates to field of power systems, more particularly, to a kind of wideband transient voltage partial pressure measuring apparatus and side
Method.
Background technique
In the power system, transmission line of electricity and substation can be because Lightning disturbance or switch isolation switch operate to form electricity
Pressure, overvoltage can jeopardize the running equipment of transmission line of electricity and substation, the accurate overvoltage pair for measuring transmission line of electricity and substation
It is of great significance in the economical Design and safe and stable operation of transmission line of electricity.But since the amplitude of overvoltage is high, bandwidth, and
Occur in unpredictable situation, it is difficult to which real-time measurement is carried out to the overvoltage of transmission line of electricity.In the past for transmission line of electricity and change
The overvoltage in power station is researched and analysed the mostly mode based on simulation calculation and is carried out, but due to being difficult to during simulation calculation sufficiently
Consider the various complex effects factors under truth, simulation result can have differences with actual operating mode, simulation calculation
Waveform parameter is only capable of as reference, can have a certain distance with true waveform, and when simulation calculation modeling has differences, institute
The over-voltage waveform of calculating is widely different, it is difficult to calculate accuracy to it and evaluate.
In order to accurately measure the over-voltage waveform of transmission line of electricity, most intuitive method is measured using divider,
It seeks the bandwidth for measuring divider used: needing to cover over-voltage waveform, measurement width of the measurement power-frequency voltage to fast wave head forward position
Degree is high: can cover the Overvoltage Amplitude of specified power frequency operation voltage to (2~3) times voltage rating.
The mode of substation's real-time monitoring overvoltage mostly uses the mode of electric-field sensor to carry out at present, electric field sensing utensil
Have the advantages that it is small in size, easy for installation, but since under complicated occasion, interference of the electric-field sensor vulnerable to ambient enviroment is removed
Outside transmission line of electricity, other electrical bodies or grounding body can carry out coupling to it also to form coupled voltages, and electricity on a sensor
There is also difficulties for the calibration of the voltage coefficient of field sensor, although therefore electric-field sensor measurement over-voltage waveform relative to imitative
The waveform really calculated has more reference value, but still cannot react true over-voltage waveform completely, and needing to design one kind can be with
Directly it is articulated to the wideband transient state divider that real-time monitoring is carried out on transmission line of electricity.
Summary of the invention
The tested electricity of real-time measurement on transmission line of electricity can not be directly articulated in order to solve the prior art existing for background technique
Road high voltage is affected by the external environment larger and is difficult to the problem of determining the true waveform of overvoltage, and the present invention provides one kind
Wideband transient voltage partial pressure measuring apparatus, described device include:
High pressure arm unit, high pressure arm unit one end are connected with test line high voltage transmission line, the other end and low-voltage arm
Unit is connected；The high pressure arm unit is used to divide the test line high voltage to obtain partial pressure low-voltage, and will be described
Partial pressure low-voltage is sent to the low pressure arm unit；
Low pressure arm unit, low pressure arm unit one end respectively with the high pressure arm unit and wideband transient measuring unit
It is connected, the other end is connected with ground terminal；The low pressure arm unit is used to the partial pressure low-voltage being sent to the wideband
Transient measuring unit；
Wideband transient measuring unit, described wideband transient measuring unit one end are connected with the low pressure arm unit；It is described
Wideband transient measuring unit is used to measure the partial pressure low-voltage that the low pressure arm unit is sent, and according to the low electricity of the partial pressure
Pressure and intrinsic standoff ratio determine the test line high voltage amplitude and waveform.
Further, described device includes M group high pressure arm unit；The M is positive integer.
Further, the high pressure arm unit includes the concatenated high-pressure resistance-capacitance module of N group；The N is positive integer.
Further, it includes PCB circuit model that the low pressure arm unit, which uses,.
Further, the low pressure arm unit includes the low pressure capacitance-resistance module of Q group parallel connection；The Q is positive integer.
Further, the high-pressure resistance-capacitance module and the low pressure capacitance-resistance module include low inductance capacitance and without inductance
Resistance.
Further, the electricity of the capacitance of the low inductance capacitance in the high-pressure resistance-capacitance module and the non-inductive resistance
Resistance value, so that the RC time constant of described device is less than P nanosecond；The P is positive number.
A kind of wideband transient voltage partial pressure measuring method includes:
Determine that wideband transient voltage partial pressure measuring apparatus mesohigh arm unit is M according to transmission line of electricity voltage class to be measured
Group；The M is positive integer；
The high pressure arm unit and the route high voltage end to be measured are connected, the wideband transient voltage partial pressure measurement is connected
Device mesolow arm unit and ground terminal connect the low pressure arm unit and wideband transient measuring unit；
The transmission line of electricity high voltage to be measured is acquired, after the high pressure arm unit and low pressure arm unit partial pressure
To partial pressure low-voltage, and the partial pressure low-voltage is sent to the wideband transient measuring unit；
The transmission line of electricity high voltage amplitude to be measured and waveform are determined according to the partial pressure low-voltage and intrinsic standoff ratio.
Further, the high pressure arm unit includes the concatenated high-pressure resistance-capacitance module of N group；The N is positive integer.
Further, the low pressure arm unit includes the low pressure capacitance-resistance module of Q group parallel connection；The Q is positive integer.
The invention has the benefit that technical solution of the present invention, gives a kind of wideband transient voltage partial pressure measurement dress
It sets including high pressure arm unit, the high pressure arm unit is used to divide the test line high voltage to obtain partial pressure low-voltage, and
The partial pressure low-voltage is sent to the low pressure arm unit；Low pressure arm unit, the low pressure arm unit are used for the partial pressure
Low-voltage is sent to the wideband transient measuring unit；Wideband transient measuring unit, the wideband transient measuring unit is for surveying
The partial pressure low-voltage that the low pressure arm unit is sent is measured, and the quilt is determined according to the partial pressure low-voltage and intrinsic standoff ratio
Survey line road high voltage；Described device carries out plural serial stage using low inductance ceramic capacitor and noninductive resistance, can directly be articulated to defeated
Real-time measurement circuit-under-test high voltage in electric line；Amplitude height, bandwidth and the external environment influence that can measure voltage are small；It is described
Device can determine the true waveform of overvoltage, be of great significance to the safe and stable operation of transmission line of electricity.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is a kind of wideband transient voltage partial pressure measuring apparatus structure chart of the specific embodiment of the invention；
Fig. 2 is a kind of wideband transient voltage partial pressure measuring method flow chart of the specific embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is a kind of wideband transient voltage partial pressure measuring apparatus structure chart of the specific embodiment of the invention.Such as Fig. 1 institute
Show, described device includes:
High pressure arm unit 1, described 1 one end of high pressure arm unit are connected with test line high voltage transmission line, the other end and low pressure
Arm unit 2 is connected；The high pressure arm unit 1 is used to divide the test line high voltage to obtain partial pressure low-voltage, and will
The partial pressure low-voltage is sent to the low pressure arm unit 2；
Further, the group number of high pressure arm unit 1, this example can be flexibly selected according to the voltage class of field test
In, using three groups of high pressure arm units 1；The power frequency withstanding voltage of every group of high pressure arm unit 1 is 150kV, and tolerance surge voltage is
400kV；
Further, the high pressure arm unit 1 is designed as to the mode of air insulation, volume is light, when being convenient for field test
Transport and installation；In order to guarantee that the capacity cell of high pressure arm unit 1 installs stability, "Ji" type organic glass branch is devised
Frame is used to fix the disk capacity cell of high pressure arm unit 1；
Further, the high pressure arm unit includes the concatenated high-pressure resistance-capacitance module 12 of N group；The N is positive integer；This reality
In example, using 20 groups of concatenated high-pressure resistance-capacitance modules 12；
Further, the high-pressure resistance-capacitance module 12 includes low inductance ceramic capacitor and non-inductive resistance；In this example,
Every grade of condenser capacity is 3000pF in the high-pressure resistance-capacitance module 12, and the resistance value of every grade of resistance is 14 Ω, be ensure that point
The RC time constant of depressor is within 100ns；
Further, it is equipped with to fix between every two-stage capacitor in high pressure arm unit 1 and uses cylindrical insulation link block, every grade
Arrangement is in parallel in a ring around cylindrical collets for resistor assembly, and noninductive resistance upper and lower ends are soldered on metal copper foil,
The metal copper foil that resistance both ends are welded closely is connect with upper and lower two-stage capacitor by nut, for reducing the spuious of resistance component
Inductance.
Low pressure arm unit 2, described 2 one end of low pressure arm unit respectively with the high pressure arm unit 1 and wideband transient measuring
Unit 3 is connected, and the other end is connected with ground terminal；The low pressure arm unit 2 is used to the partial pressure low-voltage being sent to institute
State wideband transient measuring unit 3；
Further, the low pressure arm unit 2 is using including disc type PCB circuit model；
Further, the low pressure arm unit 2 includes the low pressure capacitance-resistance module 21 of Q group parallel connection；The Q is positive integer；Institute
Stating low pressure capacitance-resistance module 21 includes low inductance ceramic capacitor and non-inductive resistance, can reduce middle element in low pressure arm unit 2
Stray inductance parameter improves the frequency response characteristic of described device；
In this example, the low pressure arm unit includes 25 groups of low pressure capacitance-resistance modules 21 in parallel；
Further, in order to guarantee the good electromagnetism interference characteristic of low pressure arm unit 2, low pressure arm unit 2 is installed on
In metal shielding box.
Wideband transient measuring unit 3, described 2 one end of wideband transient measuring unit are connected with the low pressure arm unit 2；Institute
The partial pressure low-voltage that wideband transient measuring unit 3 is sent for measuring the low pressure arm unit 2 is stated, and according to the partial pressure
Low-voltage and intrinsic standoff ratio determine the amplitude and waveform of the test line high voltage.
Further, described device it is small in size, it is light-weight, measurement bandwidth, 220kV and following substation can be useful in
Realize the scale factor calibration of the overvoltage on-line monitoring and electric-field sensor of route.
Fig. 2 is a kind of wideband transient voltage partial pressure measuring method flow chart of the specific embodiment of the invention.Such as Fig. 2 institute
Show, which comprises
Step 110, wideband transient voltage partial pressure measuring apparatus mesohigh arm is determined according to transmission line of electricity voltage class to be measured
Unit is M group；The M is positive integer；
In this example, wideband transient voltage partial pressure measuring apparatus mesohigh arm is determined according to transmission line of electricity voltage class to be measured
Unit is three groups；
Step 120, wideband transient voltage bleeder mechanism each unit is connected；Connect the high pressure arm unit and described to survey line
Road high voltage end connects the wideband transient voltage partial pressure measuring apparatus mesolow arm unit and ground terminal, connects the low pressure
Arm unit and wideband transient measuring unit；
Step 130, the transmission line of electricity high voltage to be measured is acquired, through the high pressure arm unit and the low pressure arm unit
Partial pressure low-voltage is obtained after partial pressure, and the partial pressure low-voltage is sent to the wideband transient measuring unit；
Step 140, according to the partial pressure low-voltage and intrinsic standoff ratio determine the transmission line of electricity high voltage amplitude to be measured with
And waveform；
In this example, the output cable of wideband transient voltage partial pressure measuring apparatus is connected with wideband transient measuring software；
Be arranged in Survey Software the amplitude of voltage to be measured, polarity, the wideband transient voltage partial pressure measuring apparatus intrinsic standoff ratio and
The total duration of record；
After carrying out switching operation in substation, overvoltage signal is generated, observes and records wideband transient voltage partial pressure
The wideband transient voltage signal that measuring device is recorded, and parameter point is carried out to the voltage waveform recorded in Survey Software
Analysis.
Further, the high pressure arm unit includes the concatenated high-pressure resistance-capacitance module of N group；The N is positive integer；
In this example, the high pressure arm unit includes 20 groups of concatenated high-pressure resistance-capacitance modules.
Further, the low pressure arm unit includes the low pressure capacitance-resistance module of Q group parallel connection；The Q is positive integer；
In this example, stating low pressure arm unit includes 25 groups of low pressure capacitance-resistance modules in parallel.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the disclosure
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.The step of being related in this specification, which numbers, is only used for distinguishing each step, and the time being not limited between each step
Or the relationship of logic, restriction unless the context clearly, otherwise the relationship between each step includes the case where various possible.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments means to be in the disclosure
Within the scope of and form different embodiments.For example, embodiment claimed in detail in the claims is one of any
Can in any combination mode come using.
The various component embodiments of the disclosure can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.The disclosure is also implemented as executing side as described herein
The some or all equipment or system program (for example, computer program and computer program product) of method.It is such
It realizes that the program of the disclosure can store on a computer-readable medium, or can have the shape of one or more signal
Formula.Such signal can be downloaded from an internet website to obtain, and perhaps be provided on the carrier signal or with any other shape
Formula provides.
The disclosure is limited it should be noted that above-described embodiment illustrates rather than the disclosure, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.Word "comprising" is not arranged
Except there are element or steps not listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of more
A such element.The disclosure can be by means of including the hardware of several different elements and by means of properly programmed calculating
Machine is realized.If several in these systems can be by same in the unit claim for listing dry systems
Hardware branch embodies.
The above is only the specific embodiment of the disclosure, it is noted that for the ordinary skill people of this field
Member for, do not depart from the disclosure spirit under the premise of, can make several improvements, modify and deform, these improve, modification,
It is regarded as falling within the scope of protection of this application with deformation.
Claims (10)
1. a kind of wideband transient voltage partial pressure measuring apparatus, which is characterized in that described device includes:
High pressure arm unit, high pressure arm unit one end are connected with test line high voltage transmission line, the other end and low pressure arm unit
It is connected；The high pressure arm unit is used to divide to obtain by the test line high voltage partial pressure low-voltage, and by the partial pressure
Low-voltage is sent to the low pressure arm unit；
Low pressure arm unit, low pressure arm unit one end are connected with the high pressure arm unit and wideband transient measuring unit respectively
It connects, the other end is connected with ground terminal；The low pressure arm unit is used to the partial pressure low-voltage being sent to the wideband transient state
Measuring unit；
Wideband transient measuring unit, described wideband transient measuring unit one end are connected with the low pressure arm unit；The wideband
Transient measuring unit is used to measure the partial pressure low-voltage that the low pressure arm unit is sent, and according to the partial pressure low-voltage with
And intrinsic standoff ratio determines the test line high voltage amplitude and waveform.
2. the apparatus according to claim 1, which is characterized in that described device includes M group high pressure arm unit；The M is positive
Integer.
3. the apparatus according to claim 1, which is characterized in that the high pressure arm unit includes the concatenated high-pressure resistance-capacitance of N group
Module；The N is positive integer.
4. the apparatus according to claim 1, which is characterized in that it includes PCB circuit model that the low pressure arm unit, which uses,.
5. the apparatus according to claim 1, which is characterized in that the low pressure arm unit includes the low pressure capacitance-resistance of Q group parallel connection
Module；The Q is positive integer.
6. the device according to claim 3 or 5, which is characterized in that the high-pressure resistance-capacitance module and the low pressure capacitance-resistance
Module includes low inductance capacitance and non-inductive resistance.
7. device according to claim 6, which is characterized in that the capacitor of the low inductance capacitance in the high-pressure resistance-capacitance module
The resistance value of value and the non-inductive resistance, so that the RC time constant of described device is less than P nanosecond；The P is positive number.
8. a kind of wideband transient voltage partial pressure measuring method, which is characterized in that the described method includes:
Determine that wideband transient voltage partial pressure measuring apparatus mesohigh arm unit is M group according to transmission line of electricity voltage class to be measured；Institute
Stating M is positive integer；
The high pressure arm unit and the route high voltage end to be measured are connected, the wideband transient voltage partial pressure measuring apparatus is connected
Mesolow arm unit and ground terminal connect the low pressure arm unit and wideband transient measuring unit；
The transmission line of electricity high voltage to be measured is acquired, is divided after the high pressure arm unit and low pressure arm unit partial pressure
Voltage is forced down, and the partial pressure low-voltage is sent to the wideband transient measuring unit；
The transmission line of electricity high voltage amplitude to be measured and waveform are determined according to the partial pressure low-voltage and intrinsic standoff ratio.
9. according to the method described in claim 8, it is characterized in that, the high pressure arm unit includes the concatenated high-pressure resistance-capacitance of N group
Module；The N is positive integer.
10. according to the method described in claim 8, it is characterized in that, the low pressure arm unit includes the low pressure capacitance-resistance of Q group parallel connection
Module；The Q is positive integer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910717695.8A CN110456123B (en) | 2019-08-05 | 2019-08-05 | Broadband transient voltage division measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910717695.8A CN110456123B (en) | 2019-08-05 | 2019-08-05 | Broadband transient voltage division measuring device and method |
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| CN110456123B CN110456123B (en) | 2022-09-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111025211A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | Magnitude tracing method and system of broadband voltage standard measuring device |
| CN111830313A (en) * | 2020-07-07 | 2020-10-27 | 国网福建省电力有限公司电力科学研究院 | Transient overvoltage broadband monitoring system for modular multilevel converter |
| CN115480096A (en) * | 2022-10-21 | 2022-12-16 | 国网四川省电力公司电力科学研究院 | Electrical engineering broadband voltage online monitoring device with insulation gap and method |
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| CN103558435A (en) * | 2013-11-04 | 2014-02-05 | 国网上海市电力公司 | 35kV broadband electronic type voltage transformer |
| CN103592497A (en) * | 2013-11-12 | 2014-02-19 | 安徽一天电气技术有限公司 | Broadband voltage collector |
| CN106124843A (en) * | 2016-07-08 | 2016-11-16 | 国网上海市电力公司 | A kind of wide frequency band measurement system of AC network transient process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102737828A (en) * | 2011-04-13 | 2012-10-17 | 华东电力试验研究院有限公司 | Capacitor voltage transformer provided with transient overvoltage monitoring unit |
| CN103558435A (en) * | 2013-11-04 | 2014-02-05 | 国网上海市电力公司 | 35kV broadband electronic type voltage transformer |
| CN103592497A (en) * | 2013-11-12 | 2014-02-19 | 安徽一天电气技术有限公司 | Broadband voltage collector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111025211A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | Magnitude tracing method and system of broadband voltage standard measuring device |
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| CN110456123B (en) | 2022-09-20 |
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