CN107356833A - A kind of control measuring circuit of power frequency continued flow experimental rig - Google Patents
A kind of control measuring circuit of power frequency continued flow experimental rig Download PDFInfo
- Publication number
- CN107356833A CN107356833A CN201710591194.0A CN201710591194A CN107356833A CN 107356833 A CN107356833 A CN 107356833A CN 201710591194 A CN201710591194 A CN 201710591194A CN 107356833 A CN107356833 A CN 107356833A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- control
- controller
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
The present invention provides a kind of control measuring circuit of power frequency continued flow experimental rig, belongs to power equipment control fields of measurement.The control measuring circuit includes：Primary side measuring circuit, signal conditioning circuit, control circuit and controller；Primary side measuring circuit is used to gather measurement signal from a lateral circuit, and measurement signal is transmitted to signal conditioning circuit；Signal conditioning circuit is used to carry out signal condition and digital-to-analogue conversion to measurement signal, and the measurement signal after conversion is transmitted to controller；Controller is used for according to the measurement signal after conversion, and to control circuit output control signal, the impulse voltage generator triggered by control circuit in a lateral circuit produces impulse overvoltage；Wherein, control circuit, signal conditioning circuit and controller are mutually isolated between each road voltage respectively by power voltage supply all the way.The present invention can effectively prevent control measuring circuit of the impulse overvoltage to power frequency continued flow experimental rig caused by impulse voltage generator in a lateral circuit from causing damage.
Description
Technical field
The present invention relates to power equipment control fields of measurement, more particularly, to a kind of control of power frequency continued flow experimental rig
Measuring circuit processed.
Background technology
Electric lightning is widely used in power supply and railway power system, for lightning current to be imported into the earth, from
And suppress influence of the lightning wave overvoltage to power consumer.Currently used electric lightning is Zinc-Oxide Arrester.Due to electricity
The quality of power arrester quality directly influences the quality of power system lightning protection properties, so as to Zinc-Oxide Arrester in lightning wave
Electric current recovery characteristics under effect carry out pilot study, that is, carry out the power frequency continued flow experiment of arrester, have highly important
Engineering practical value.
Carrying out the power frequency continued flow experiment of arrester needs to realize power frequency and combined impulse pressurization, relative to single power frequency with
And for impulse voltage generator, power frequency continued flow experimental rig requires that impulse overvoltage can fold in any point of power frequency ac voltage
Add, the requirement for control accuracy is higher.At the same time, because surge voltage amplitude is high, steepness is big, and impulse overvoltage is superimposed upon
Power frequency electric potential source may be caused to damage on power frequency supply.Therefore, the reliability and stability of power frequency continued flow experimental rig will
Ask also higher.
In the related art, there is provided a kind of control measuring circuit of power frequency continued flow experimental rig, its power frequency supply is to adopt
Power-frequency voltage is produced with RLC oscillation circuits.Such power frequency continued flow experimental rig often can not necessarily produce in test humorous
Shake, and frequency of oscillation is not necessarily 50Hz power frequencies, the randomness for causing such power frequency continued flow to be tested is very big.In addition, according to IEC
(International Electro technical Commission, International Electrotechnical Commission) standard, it is existing most of
Power frequency continued flow experimental rig produces power-frequency voltage using power network joint test transformer, and impulse voltage generator, which produces, impacted electricity
Pressure, isolated between power frequency supply and impact power supply using impact ball gap.Such power frequency continued flow experimental rig is being tested
When, because impulse overvoltage is superimposed with AC power between control circuit, measuring circuit and power supply, it is more likely that power frequency is continued
The control measuring apparatus of stream experimental rig causes larger damage.
The content of the invention
The present invention provides a kind of power frequency continued flow experiment dress for overcoming above mentioned problem or solving the above problems at least in part
The control measuring circuit put.
The control measuring circuit of the power frequency continued flow experimental rig includes：One-shot measurement circuit, signal conditioning circuit, control electricity
Road and controller；
Primary side measuring circuit is used to gather measurement signal from a lateral circuit, and measurement signal is transmitted to signal condition electricity
Road；Signal conditioning circuit is used to carry out signal condition and digital-to-analogue conversion to measurement signal, by the measurement signal after conversion transmit to
Controller；Controller is used for according to the measurement signal after conversion, and to control circuit output control signal, one is triggered by control circuit
Impulse voltage generator in secondary lateral circuit, produce impulse overvoltage；Wherein, control circuit, signal conditioning circuit and controller
It is mutually isolated between each road voltage respectively by power voltage supply all the way.
Wherein, device also includes the first photoelectric isolation module；Primary side measuring circuit is used to transmit measurement signal to the
One photoelectric isolation module, the first photoelectric isolation module is used to carry out Phototube Coupling to measurement signal, by the measurement after Phototube Coupling
Signal is transmitted to signal conditioning circuit.
Wherein, device also includes the second photoelectric isolation module；Control circuit is used for according to the measurement signal after conversion, to the
Two photoelectric isolation module output control signals；Second photoelectric isolation module is used to carry out Phototube Coupling to control signal, to control
Control signal after circuit output Phototube Coupling.
Wherein, measurement signal includes power-frequency voltage signal, test product both end voltage signal, flows through test product current signal；Once
Side measuring circuit includes RC divider, capacitive divider, Rogowski coil, and RC divider is used to measure power-frequency voltage signal,
Capacitive divider is used to measure test product both end voltage signal, and Rogowski coil flows through test product electric current for measurement.
Wherein, control circuit, signal conditioning circuit and controller are powered by default power supply；Default power supply connection isolation becomes
Depressor, by isolating transformer to control circuit, signal conditioning circuit and controller output multi-channel voltage, control circuit, signal
Modulate circuit and controller correspond to individually voltage all the way respectively.
Wherein, it is uninterrupted power source to preset power supply.
Wherein, a lateral circuit includes industrial-frequency alternating current potential source and impulse voltage generator；Industrial-frequency alternating current potential source, it is tested
Test product and impulse voltage generator three are in parallel.
Wherein, industrial-frequency alternating current potential source includes pressure regulator and testing transformer；Pressure regulator is in parallel with testing transformer.
The beneficial effect brought of technical scheme that the application proposes is：
First, can by the way that each branch voltage corresponding to control circuit, signal conditioning circuit and controller is mutually isolated
Effectively prevent impulse overvoltage caused by the impulse voltage generator in a lateral circuit from being caused damage to control circuit, so as to
Effectively prevent the control measuring apparatus to power frequency continued flow experimental rig from causing to damage.
Secondly as power frequency supply can be controlled to combine pressurization with impact power supply, and measure and obtain testing transformer outlet
Voltage and the voltage x current being applied on test product, and then assess and power frequency arc is extinguished under lightning wave effect to arrester equipment
Ability.
Further, since primary side measuring circuit is using divider measurement power-frequency voltage and product to be tested both end voltage；Adopt
The electric current of product to be tested is flowed through with Rogowski coil measurement.The voltage and current signal that divider obtains with Rogowski coil measurement is through photoelectricity
Signal condition and A/D change-over circuits are transferred to after isolation, by Voltage to current transducer into being transferred to controller after digital quantity, so as to
The measured distortion brought by electromagnetic interference problem can effectively be prevented.
Finally, due to punching is calculated in the conduction phase angle that the power-frequency voltage signal and user that can be obtained according to measurement input
Hit the triggering and conducting time of voltage generator, and by relay triggering impulse voltage generator conducting so that impact and power frequency electric
Arbitrary phase superposition is pressed in, and then realizes joint pressurization.
Brief description of the drawings
Fig. 1 is the structural representation according to a kind of control measuring circuit of power frequency continued flow experimental rig of the embodiment of the present invention
Figure；
Fig. 2 is the structural representation according to a kind of signal conditioning circuit of the embodiment of the present invention；
Fig. 3 is the structural representation according to a kind of control circuit of the embodiment of the present invention；
Fig. 4 is the structural representation according to a kind of primary side measuring circuit of the embodiment of the present invention；
Fig. 5 is the structural representation according to a kind of default power supply of the embodiment of the present invention；
Fig. 6 is a kind of synchronous schematic flow sheet for triggering algorithm according to the embodiment of the present invention；
Fig. 7 is the structural representation according to an a kind of lateral circuit for the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
In a specific embodiment, the present invention is described further with reference to accompanying drawing.Provided referring to Fig. 1, Fig. 1
A kind of control measuring circuit of power frequency continued flow experimental rig, the device include：Primary side measuring circuit 101, signal condition electricity
Road 102, control circuit 103 and controller 104.
Primary side measuring circuit 101 is used to gather measurement signal from a lateral circuit, and measurement signal is transmitted to signal and adjusted
Manage circuit 102；Signal conditioning circuit 102 is used to carry out signal condition and digital-to-analogue conversion to measurement signal, by the measurement after conversion
Signal is transmitted to controller 104；Controller 104 is used to, according to the measurement signal after conversion, to the output control of control circuit 103 believe
Number, the impulse voltage generator in a lateral circuit is triggered by control circuit 103, produces impulse overvoltage；Wherein, control circuit
103rd, signal conditioning circuit 102 and controller are mutually isolated between each road voltage respectively by power voltage supply all the way.
Wherein, after the measurement signal that primary side measuring circuit 101 is transmitted is transmitted through the fiber to signal conditioning circuit 102,
The optical signal received can first be converted into the electric signal of secondary side by signal conditioning circuit 102, be adjusted through operation amplifier and level
After the signal condition processes such as reason, it can transmit to A/D (mould electricity) change-over circuit, A/D change-over circuits and convert analog signals into numeral
After signal, it can transmit to the control circuit of computer terminal and be handled.Wherein, signal conditioning circuit 102 is secondary side signal
Modulate circuit, Fig. 2 are the structural representation of signal conditioning circuit 102.
The control measuring circuit of power frequency continued flow experimental rig provided in an embodiment of the present invention, by by control circuit 103, letter
Each branch voltage corresponding to number modulate circuit 102 and controller 104 is mutually isolated, can effectively prevent rushing in a lateral circuit
Hit impulse overvoltage caused by voltage generator to cause damage to control circuit 103, so as to effectively prevent from trying power frequency continued flow
The control measuring apparatus of experiment device causes to damage.
As a kind of alternative embodiment, the device also includes the first photoelectric isolation module 105；Primary side measuring circuit 101
For measurement signal to be transmitted to the first photoelectric isolation module 105, the first photoelectric isolation module 105 is used to carry out measurement signal
Phototube Coupling, the measurement signal after Phototube Coupling is transmitted to signal conditioning circuit 102.
Wherein, photoelectric isolation module is a kind of new device of transistor Sensitive Apparatus and light emitting diode composition.It
Major function is electric signal when transmission, input are with output, and realization is dielectrically separated from.In addition, signal passes through light in one-way transmission
Being electrically isolated module can realize that feedback-less influences and with characteristics such as strong interference immunity and fast response times.Photoelectric isolation module exists
During work, generally input signal is added to input, to cause luminous tube to light.Light-sensitive device output light under Magnetic Optical Radiation
Electric current, so as to realize the conversion twice of electric light point.
Phototube Coupling is carried out to measurement signal by the first photoelectric conversion module 105 so that primary side measuring circuit 101
The input of output end and signal conditioning circuit 102 realizes electrical isolation, that is, the measurement signal exported is to signal conditioning circuit
102 input enhances the antijamming capability of measurement signal without influence, improves the efficiency of transmission of measurement signal.
As a kind of alternative embodiment, device also includes the second photoelectric isolation module 106；Control circuit 103 is used for basis
Measurement signal after conversion, to the output control signal of the second photoelectric isolation module 106；Second photoelectric isolation module 106 be used for pair
Control signal carries out Phototube Coupling, the control signal after isolating to the output photoelectric of control circuit 103.
Phototube Coupling is carried out to control signal by the second photoelectric conversion module 106 so that the output end of control circuit 103
And the input of controller 104 realizes electrical isolation, that is, the control signal signal exported is to the input of controller 104 without shadow
Ring, enhance the antijamming capability of measurement signal, improve the efficiency of transmission of control signal.
In addition, control signal is transmitted by way of data line transfer to the second photoelectric isolation module 106, light can be carried out
It is electrically isolated.Control signal after Phototube Coupling can be transmitted through the fiber to controller 104.Controller 104 is receiving control letter
After number, corresponding control level can be generated according to the instruction of computer terminal, to control impulse voltage generator impacting electric capacity to charge
Or triggering electric discharge, to produce impulse overvoltage.Wherein, the structure of control circuit 103 can be as shown in Figure 3.
As a kind of alternative embodiment, measurement signal includes power-frequency voltage signal, test product both end voltage signal, flows through test product
Current signal；Primary side measuring circuit 101 includes RC divider, capacitive divider, Rogowski coil, and RC divider is used to survey
Measure power-frequency voltage signal, capacitive divider is used to measure product to be tested both end voltage signal, Rogowski coil for measurement flow through by
Test article electric current.
Specifically, the pulsed capacitance divider in primary side measuring circuit 101, the electricity at measurable product to be tested both ends are passed through
Press signal V1.Pass through the measurable power-frequency voltage signal V2 of RC divider in primary side measuring circuit 101.Surveyed by primary side
Measure the Rogowski coil in circuit 101, the measurable current signal i for flowing through product to be tested.Measuring power-frequency voltage signal V2, be tested
The voltage signal V1 at test product both ends and after flowing through the current signal i of product to be tested, can be using above-mentioned three kinds of signals as measurement
Signal, measurement signal is transmitted in a manner of optical signal to signal conditioning circuit 102 the first photoelectric conversion module 105, this
Inventive embodiments are not especially limited to this.As shown in figure 4, the left side the first width figure is the structural representation of Rogowski coil in Fig. 4,
A width figure be the structural representation of pulsed capacitance divider among Fig. 4, in Fig. 4 on the right of a width figure be that the structure of RC divider is shown
It is intended to.
As a kind of alternative embodiment, control circuit 103, signal conditioning circuit 102 and controller 104 are by presetting power supply
Power supply；Default power supply connection isolating transformer, to control circuit 103, signal conditioning circuit 102 and is controlled by isolating transformer
The output multi-channel voltage of device 104, control circuit 103, signal conditioning circuit 102 and controller 104 correspond to individually voltage all the way respectively.
Specifically, default power supply can be located at secondary side, the secondary power supply in as Fig. 1.Control circuit 103, primary side are surveyed
Power supply is preset corresponding to amount circuit 101 and controller 104 with primary side electric network source to isolate.Default power supply output 220V alternating currents
Pressure, and connect isolating transformer.It is mutually isolated between isolating transformer primary side winding and each vice-side winding.Default power supply exists
By exportable multiple power supplies after isolating transformer vice-side winding, to be respectively control circuit 103, primary side measuring circuit 101
And controller 104 provides voltage all the way.Specifically, presetting the multiple power supplies of power supply output can include：Analog signal conditioner electricity
Road AC power；A/D sample circuit power supplys；Computer power；PLC (Programmable Logic Controller, may be programmed
Logic controller) controller power source；Impulse voltage generator controls power supply and impulse voltage generator action power.Wherein,
The structure of default power supply can be as shown in Figure 5.
As a kind of alternative embodiment, it is uninterrupted power source to preset power supply.
Wherein, between analog signal conditioner circuit power, A/D sample circuits power supply, computer power altogether, three power supplys it
Between ground potential between connected by magnetic bead.Lead between PLC power supply and impulse voltage generator control power supply ground potential
Cross magnetic bead connection.Correspondingly, it is mutually isolated between remaining each power supply.It should be noted that controller noted above 104 can be upper
PLC is stated, the embodiment of the present invention is not especially limited to this.
Specifically, default power supply can be UPS (Uninterruptible Power System/Uninterruptible
It is Power Supply, uninterrupted) power supply, the embodiment of the present invention is not especially limited to this.For ups power, it can be by direct current
Electric energy supplies 220V alternating currents by inverter switch transition mode to load continuous, to cause load to maintain normal work, and
The software and hardware of load can be protected without damage.
For the ease of understanding the control process of impulse overvoltage, now to power frequency continued flow device provided in an embodiment of the present invention
Synchronous trigger method illustrates.Wherein, the algorithm can be pre-configured in computer terminal, and the embodiment of the present invention is not made to this
It is specific to limit.Specifically, the input quantity of synchronous triggering algorithm is power-frequency voltage, surge voltage amplitude and phase-triggered angle.It is logical
The amplitude and current phase angle that power-frequency voltage is calculated are crossed, when power-frequency voltage current phase angle reaches phase-triggered angle,
Instruction is sent to controller 104, control impulse voltage generator triggering produces impulse overvoltage.Surge voltage amplitude signal by with
Family is input to the processor of computer terminal, the capacitor charging time of the processor control impulse voltage generator of computer terminal and punching
Bat stand-off distance from, and then control surge voltage amplitude.Wherein, the control process of synchronous triggering algorithm refers to Fig. 6.
As a kind of alternative embodiment, one time lateral circuit includes industrial-frequency alternating current potential source and impulse voltage generator；Power frequency
Alternating-current voltage source, product to be tested and impulse voltage generator three are in parallel.
As a kind of alternative embodiment, industrial-frequency alternating current potential source includes pressure regulator and testing transformer；Pressure regulator and examination
Test transformers connected in parallel.
Specifically, as shown in Figure 7.Dotted line frame 1 represents industrial-frequency alternating current potential source in Fig. 7, by line voltage AC input, connection
To pressure regulator and testing transformer T.Wherein, testing transformer output 50Hz power-frequency voltages.Dotted line frame 2 represents surge voltage hair
Raw device, when triggered gap punctures, charging capacitor produces surge voltage to load discharge.Dotted line frame 3 represents product to be tested, wherein S1
The series gap of product to be tested is represented, RT1 represents the ZnO resistors of product to be tested；S2 represents surge voltage source and power frequency supply
Between batching sphere gap；RT2 indication transformers outlet protection arrester, L and R are represented to protect inductance and protective resistance respectively, used
In protection test transformer from damage.V1 and V2 represents voltage and transformer output port voltage on test product, i tables respectively
Show the electric current for flowing through test product, V1, V2 and i belong to measured, and measuring circuit 102 is transferred to as measurement signal.
The embodiment of the present invention can control power frequency supply to combine pressurization with impact power supply, and measurement obtains testing transformer and gone out
Mouth voltage and the voltage x current being applied on test product, and then assess and power frequency electric is extinguished under lightning wave effect to arrester equipment
The ability of arc.
Primary side measuring circuit 101 provided in an embodiment of the present invention is using divider measurement power-frequency voltage and test product both ends
Voltage；The electric current of test product is flowed through using Rogowski coil measurement.The voltage and current signal that divider obtains with Rogowski coil measurement passes through
Signal condition and A/D change-over circuits are transferred to after Phototube Coupling, by Voltage to current transducer into being transferred to controller after digital quantity
104.What control measuring circuit provided in an embodiment of the present invention can effectively prevent from bringing by electromagnetic interference problem is measured
Distortion.
The conducting phase that the power-frequency voltage signal and user that the control circuit 103 of the embodiment of the present invention obtains according to measurement input
The triggering and conducting time of impulse voltage generator is calculated in parallactic angle, and by relay triggering impulse voltage generator conducting, makes
It must impact with power-frequency voltage in any Phase Stacking, and then realize joint pressurization.
The present invention power unit individually powered using ups power, control circuit 103, primary side measuring circuit 101 and
It is mutually isolated between the power supply of controller 104, it can effectively prevent impulse overvoltage caused by impulse voltage generator to control
Circuit 103 processed and primary side measuring circuit 101 cause damage.
Finally, the present processes are only preferable embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in
Within the scope of.
Claims (8)
- A kind of 1. control measuring circuit of power frequency continued flow experimental rig, it is characterised in that including：Primary side measuring circuit, signal Modulate circuit, control circuit and controller；The primary side measuring circuit is used to gather measurement signal from a lateral circuit, and the measurement signal is transmitted to the letter Number modulate circuit；The signal conditioning circuit is used to carry out signal condition and digital-to-analogue conversion to the measurement signal, after conversion Measurement signal transmit to the controller；The controller is used for according to the measurement signal after the conversion, to the control Circuit output control signal, the impulse voltage generator in a lateral circuit is triggered by the control circuit, produces impact Overvoltage；Wherein, the control circuit, the signal conditioning circuit and the controller are respectively by power voltage supply all the way, each road It is mutually isolated between voltage.
- 2. device according to claim 1, it is characterised in that described device also includes the first photoelectric isolation module；It is described Primary side measuring circuit is used to transmit the measurement signal to first photoelectric isolation module, the first Phototube Coupling mould Block is used to carry out Phototube Coupling to the measurement signal, and the measurement signal after Phototube Coupling is transmitted to signal condition electricity Road.
- 3. device according to claim 1, it is characterised in that described device also includes the second photoelectric isolation module；It is described Control circuit is used for according to the measurement signal after the conversion, to the second photoelectric isolation module output control signal；It is described Second photoelectric isolation module is used to carry out Phototube Coupling to the control signal, to after the control circuit output Phototube Coupling Control signal.
- 4. device according to claim 1, it is characterised in that the measurement signal includes power-frequency voltage signal, test product two Terminal voltage signal, flow through test product current signal；The primary side measuring circuit includes RC divider, capacitive divider, Roche Coil, the RC divider are used to measure the power-frequency voltage signal, and capacitive divider is used to measure product to be tested both ends electricity Signal is pressed, Rogowski coil flows through product to be tested electric current for measurement.
- 5. device according to claim 1, it is characterised in that the control circuit, the signal conditioning circuit and described Controller is powered by default power supply；The default power supply connection isolating transformer, by the isolating transformer to the control Circuit, the signal conditioning circuit and the controller output multi-channel voltage processed, the control circuit, the signal conditioning circuit And the controller corresponds to individually voltage all the way respectively.
- 6. device according to claim 5, it is characterised in that the default power supply is uninterrupted power source.
- 7. device according to claim 4 a, it is characterised in that lateral circuit includes industrial-frequency alternating current potential source and punching Hit voltage generator；The industrial-frequency alternating current potential source, the product to be tested and the impulse voltage generator three are in parallel.
- 8. device according to claim 7, it is characterised in that the industrial-frequency alternating current potential source includes pressure regulator and experiment Transformer；The pressure regulator is in parallel with the testing transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710591194.0A CN107356833B (en) | 2017-07-19 | 2017-07-19 | Control measurement circuit of power frequency follow current test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710591194.0A CN107356833B (en) | 2017-07-19 | 2017-07-19 | Control measurement circuit of power frequency follow current test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107356833A true CN107356833A (en) | 2017-11-17 |
| CN107356833B CN107356833B (en) | 2023-06-27 |
Family
ID=60284779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710591194.0A Active CN107356833B (en) | 2017-07-19 | 2017-07-19 | Control measurement circuit of power frequency follow current test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107356833B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581113A (en) * | 2018-12-11 | 2019-04-05 | 武汉水院电气有限责任公司 | A kind of multi-chamber clearance lightning-proof device power frequency continued flow breaking capacity test circuit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352251Y (en) * | 2009-01-21 | 2009-11-25 | 许继集团有限公司 | Impact test device of high voltage direct current (HVDC) power transmission converter valve |
| CN202041584U (en) * | 2011-01-10 | 2011-11-16 | 西安交通大学 | Measuring device for impulse grounding resistance of movable tower |
| CN102544842A (en) * | 2010-12-13 | 2012-07-04 | 徐新东 | Socket with improved impact resistance and insulating property |
| CN104237831A (en) * | 2014-10-13 | 2014-12-24 | 国家电网公司 | Set for calibrating tester of arrester counter |
| CN104267277A (en) * | 2014-09-23 | 2015-01-07 | 广东电网有限责任公司佛山供电局 | Overvoltage protective performance testing device for overvoltage protective device and control method and system |
| CN106054006A (en) * | 2016-08-08 | 2016-10-26 | 国网湖南省电力公司 | Low-voltage arc starting and gap distance adjustable power-frequency freewheeling test apparatus and method |
| CN106646307A (en) * | 2016-10-14 | 2017-05-10 | 国家电网公司 | Lightning arrester counter calibration device |
| CN207366648U (en) * | 2017-07-19 | 2018-05-15 | 国网湖南省电力公司 | A kind of control measuring circuit of power frequency continued flow experimental rig |
-
2017
- 2017-07-19 CN CN201710591194.0A patent/CN107356833B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352251Y (en) * | 2009-01-21 | 2009-11-25 | 许继集团有限公司 | Impact test device of high voltage direct current (HVDC) power transmission converter valve |
| CN102544842A (en) * | 2010-12-13 | 2012-07-04 | 徐新东 | Socket with improved impact resistance and insulating property |
| CN202041584U (en) * | 2011-01-10 | 2011-11-16 | 西安交通大学 | Measuring device for impulse grounding resistance of movable tower |
| CN104267277A (en) * | 2014-09-23 | 2015-01-07 | 广东电网有限责任公司佛山供电局 | Overvoltage protective performance testing device for overvoltage protective device and control method and system |
| CN104237831A (en) * | 2014-10-13 | 2014-12-24 | 国家电网公司 | Set for calibrating tester of arrester counter |
| CN106054006A (en) * | 2016-08-08 | 2016-10-26 | 国网湖南省电力公司 | Low-voltage arc starting and gap distance adjustable power-frequency freewheeling test apparatus and method |
| CN106646307A (en) * | 2016-10-14 | 2017-05-10 | 国家电网公司 | Lightning arrester counter calibration device |
| CN207366648U (en) * | 2017-07-19 | 2018-05-15 | 国网湖南省电力公司 | A kind of control measuring circuit of power frequency continued flow experimental rig |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581113A (en) * | 2018-12-11 | 2019-04-05 | 武汉水院电气有限责任公司 | A kind of multi-chamber clearance lightning-proof device power frequency continued flow breaking capacity test circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107356833B (en) | 2023-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9482699B2 (en) | Method and apparatus for monitoring high voltage bushings safely | |
| CN104662761B (en) | Device comprising a controllable grounding transformer | |
| CN207366648U (en) | A kind of control measuring circuit of power frequency continued flow experimental rig | |
| Yang et al. | Measurement of lightning-induced overvoltage in power distribution lines using ceramic-capacitor insulator | |
| CN105527549A (en) | Partial discharge data collection circuit and detection system | |
| EP2807664B1 (en) | Combined transformer for power system | |
| CN107356833A (en) | A kind of control measuring circuit of power frequency continued flow experimental rig | |
| CN204649860U (en) | A kind of multifunctional high pressure fuse device for detecting performance | |
| CN205229398U (en) | Partial discharge data acquisition circuit and detecting system | |
| CN105403808B (en) | A kind of localization method and device of DC line earth fault | |
| CN208094174U (en) | A kind of Novel intelligent breaker device | |
| CN207281165U (en) | A kind of induced voltage detection device and its control system | |
| CN105807193A (en) | Same-frequency same-phase voltage withstanding test device with safety sampling signals | |
| CN105353287A (en) | Partial discharge data acquisition circuit and apparatus | |
| CN104375031A (en) | On-line measurement device for power supply system surge protection device insulation resistance | |
| CN105510731B (en) | Power transformer medium voltage side power grid parallel resonance detects alarm method and system | |
| CN206023808U (en) | Ethernet electrical equipment and its protection circuit | |
| CN105445521A (en) | Optical voltage transformer | |
| CN209280789U (en) | A kind of device measuring capacitance current by arc suppression coil | |
| CN204188724U (en) | A kind of on-line measurement device of electric power system surge protector insulation resistance | |
| CN210665864U (en) | Single-phase grounding capacitance current testing device of high-voltage power grid | |
| CN102709045A (en) | Combined mutual inductor | |
| CN202502175U (en) | Overvoltage transmission test system based on CVT | |
| CN105229759B (en) | For the equipment of the unidirectional flux component in the magnetic core for reducing transformer | |
| Oliveira | Design of a low-cost residual current sensor for LVDC power distribution application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |