CN105974280A - GIS voltage holding test device - Google Patents
GIS voltage holding test device Download PDFInfo
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- CN105974280A CN105974280A CN201610300694.XA CN201610300694A CN105974280A CN 105974280 A CN105974280 A CN 105974280A CN 201610300694 A CN201610300694 A CN 201610300694A CN 105974280 A CN105974280 A CN 105974280A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a GIS voltage holding test device including a phase-shifting transformer, a voltage modulator, a testing transformer, a damping resistor, an inductance modulating electric reactor, a voltage divider and a control protection device. The control protection device is used for receiving testing voltage and reference voltage and is connected with the phase-shifting transformer and the voltage modulator separately. The voltage modulator is connected with the phase-shifting transformer. The voltage transformer is connected with the testing transformer. The voltage divider is connected with the testing transformer. The voltage divider is connected with the control protection device. The voltage divider is connected to a to-be-tested interval. According to the invention, the phase-shifting transformer is utilized for performing real time dynamic adjustment on operating voltage and testing voltage phases, so that the phase difference of the testing voltage and the operating voltage becomes the minimum and therefore that the disconnection port voltage is the minimum is ensured. Voltage holding tests on the extension or maintenance interval are realized in a condition that power interruption of an adjacent part is saved.
Description
Technical field
The present invention relates to technical field of electric power, particularly a kind of GIS Withstand test device.
Background technology
Cubicle Gas-Insulated Switchgear (hereinafter referred to as GIS) is applied more and more extensive in power system, but GIS exists
After interval enlarging and maintenance (particularly double bus scheme GIS), it is required to carry out in the case of original operation brownout pressure
Test.GIS expansion spacing or Disintegration overhaul interval are only disconnected by disconnecting switch with adjacent operation part, if operation part is not stopped
Electricity, then keep apart during ac voltage withstanding at shutoff mouth it may happen that superpose reverse with working voltage of test voltage causes isolation fracture to hit
Pierce into and jeopardize the situation of operation equipment, therefore the GIS pressure test of the standard such as DL/T 555, DL/T 617, DL/T 618 regulation
Time neighbouring device answer power-off ground connection, be otherwise considered as taking measures owing to puncturing suddenly the damage that original part is caused.
And for some important load-center substations and the GIS transformer station with important loads such as traction station of electrical railroad, the most double
Bus GIS, power supply reliability is required the highest by these transformer stations, is difficult in the case of full station has a power failure carry out pressure test.Cause
This, need a kind of pressure test system to realize carrying out pressure test in the case of full station does not has a power failure.
Summary of the invention
The problem to be solved in the present invention is to arrange a kind of pressure test system to realize carrying out pressure examination in the case of full station does not has a power failure.
It is an object of the invention to be achieved through the following technical solutions:
A kind of GIS Withstand test device that the present invention provides, including phase-shifting transformer, pressure regulator, testing transformer, damping electricity
Resistance, tune sense reactor, potentiometer and control protective unit；
Described control protective unit is used for receiving test voltage and reference voltage and being connected with phase-shifting transformer and pressure regulator respectively；Institute
State pressure regulator to be connected with phase-shifting transformer；Described pressure regulator is connected with testing transformer；Described potentiometer is connected with testing transformer；
Described potentiometer is connected with control protective unit；Described potentiometer and interval to be tested are also connected.
Further, described potentiometer is connected with testing transformer by damping resistance and the tune sense reactor of concatenation.
Further, described reference voltage is obtained by the voltage transformer being connected with bus.
Further, described control protective unit is connected with display；Described display is for showing reference voltage and feedback voltage
Phase difference θ.
Further, the voltage-phase of described phase-shifting transformer in the range of 0-360 ° with angle, θ step-by-step adjustment, wherein, θ=60 °
/ 2m, m >=1.
Further, described control protective unit is provided with fracture voltage protection operating unit, busbar voltage protection operating unit and examination
Test voltage protection operating unit；Described fracture voltage protection operating unit, for reaching with reference voltage phase deviation at test voltage
Fracture voltage protection act is realized during to predetermined threshold value；Described busbar voltage protection operating unit, for reaching pre-in busbar voltage
If realizing busbar voltage protection act during threshold value；The protection operation of described test voltage, for when test voltage reaches predetermined threshold value
Realize test voltage protection act.
Owing to have employed technique scheme, present invention have the advantage that:
The GIS pressure test method that the present invention provides, utilizes PHASE-LOCKED LOOP PLL TECHNIQUE to enter working voltage and test voltage frequency and phase place
Row real time dynamic tracing, makes test voltage be in frequency cophasal state, so that it is guaranteed that fracture is electric with frequency and the phase place of working voltage
Press the minimum and voltage-withstand test that do not has a power failure, it is achieved under adjacent part no cut-off condition, enlarging or maintenance interval are carried out pressure test
Method.
Other advantages, target and the feature of the present invention will be illustrated to a certain extent in the following description, and at certain
In kind of degree, will be apparent to those skilled in the art based on to investigating hereafter, or can be from this
Bright practice is instructed.The target of the present invention and other advantages can be realized by description below and obtain.
Accompanying drawing explanation
The accompanying drawing of the present invention is described as follows.
Fig. 1 is the connection diagram structural representation of a kind of GIS pressure-resistant test system.
Fig. 2 is a kind of GIS voltage-withstand test method flow schematic diagram.
Fig. 3 is that phase-shifting transformer regulates schematic flow sheet.
Fig. 4 is GIS pressure test protection act flow chart.
In figure: 1 is phase-shifting transformer；2 is pressure regulator；3 is testing transformer；4 is damping resistance；5 for adjusting sense reactor；
6 is potentiometer；7 is control protective unit.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As it can be seen, a kind of GIS Withstand test device that the present embodiment provides, become including phase-shifting transformer, pressure regulator, test
Depressor, damping resistance, tune sense reactor, potentiometer and control protective unit；
Described control protective unit is used for receiving test voltage and reference voltage and being connected with phase-shifting transformer and pressure regulator respectively；Institute
State pressure regulator to be connected with phase-shifting transformer；Described pressure regulator is connected with testing transformer；Described potentiometer is connected with testing transformer；
Described potentiometer is connected with control protective unit；Described potentiometer and interval to be tested are also connected.
Described potentiometer is connected with testing transformer by damping resistance and the tune sense reactor of concatenation.Described reference voltage by with
The voltage transformer that bus connects obtains.Described control protective unit is provided with fracture voltage protection operating unit, busbar voltage is protected
Protect operating unit and test voltage protection operating unit；
A) described fracture voltage protection operating unit, for real when test voltage reaches predetermined threshold value with reference voltage phase deviation
Existing fracture voltage protection act；
B) described busbar voltage protection operating unit, for realizing busbar voltage protection act when busbar voltage reaches predetermined threshold value；
C) described test voltage protection operation, for realizing test voltage protection act when test voltage reaches predetermined threshold value.
The present embodiment also provides for a kind of GIS pressure test method, comprises the following steps:
S100: the disconnecting switch between interval to be measured and former operation GIS device is disconnected,
Voltage on the low pressure winding of voltage transformer on any one bus in the GIS device transformer station of acquisition double bus scheme,
And by described voltage as the reference voltage；
Obtain the test voltage on described interval to be measured, and utilize potentiometer that described test voltage is carried out sampling to obtain feedback voltage；
S200: relatively described reference voltage and feedback voltage, regulates the gear of phase-shifting transformer according to phase contrast between the two,
The voltage-phase that phase-shifting transformer is exported is minimum with reference voltage phase contrast；
S300: output voltage is amplified the series resonant circuit through pressure regulator, testing transformer and reactor composition and exports described
On interval to be tested.
Further comprising the steps of:
Judge pressure during reference voltage and test voltage phase deviation whether exceed default outlier threshold, if it is, logical
Cross control protective unit to cut off the electricity supply output.
The voltage-phase of described phase-shifting transformer in the range of 0-360 ° with angle, θ step-by-step adjustment, wherein, θ=60 °/2m, m
≥1。
Further comprising the steps of:
S201: reference voltage and feedback voltage are detected by described control protective unit in real time, obtains phase contrast between the two
Δ θ, and shown by display.
Further comprising the steps of:
S202: calculate Δ θ/θ ratio；And carry out round, it is set to K；
S203: the step-by-step adjustment phase-shifting transformer conversion position of the switch is set to K time；
S204: detection busbar voltage and test voltage phase difference θ in real time；
S205: judge the difference of Δ θ Yu θ, S206: if Δ θ is more than θ, then the locking of pressure regulator boost function is closed and is risen
Press operation；S207: if < during θ, then pressure regulator boost function is open carries out boost operations to Δ θ.
Described control protective unit is provided with fracture voltage protection operating unit, busbar voltage protection operating unit and test voltage and protects
Protect operating unit；
A) described fracture voltage protection operating unit is carried out in such a way:
When test voltage exceedes unit protection definite value with reference voltage phase deviation, then starting protection operation；
When test voltage more than Um/ √ 3 time, phase difference θ > θ time, starting protection operational motion；
When fracture voltage value exceedes the protection definite value that device sets, then starting protection operation；
B) described busbar voltage protection operating unit is carried out in such a way:
When monitoring bus frequency beyond 50 ± 0.5Hz scope or sudden change in the range of 50 ± 0.5Hz, starting protection operates；
When busbar voltage fluctuation scope exceed per second ± 10% scope time, starting protection operate.
C) described test voltage protection operating unit is carried out in such a way:
When test voltage value exceedes the protection definite value that device sets, starting protection operates；
When test voltage fluctuation range exceed per second ± 10% scope time, starting protection operate；
When test voltage generation flashover, starting protection operates.
Embodiment 2
The gas-insulated metal enclosed switchgear GIS voltage-withstand test method that the present embodiment provides, the GIS being applied to double bus scheme sets
Standby transformer station, wherein: the disconnecting switch between interval to be measured and former operation GIS device disconnects, it is characterised in that include following
Step:
Obtain the electricity on the low pressure winding of voltage transformer on any one bus in the GIS device transformer station of described double bus scheme
Pressure, and by this voltage as the reference voltage；
Obtain the test voltage on described interval to be measured, and utilize potentiometer that described test voltage is carried out sampling to obtain feedback voltage；
Relatively described reference voltage and feedback voltage, regulate the gear of phase-shifting transformer according to phase contrast between the two so that moves
The voltage-phase of phase transformer output is minimum with reference voltage phase contrast, and amplifies output voltage through pressure regulator, testing transformer
With the series resonant circuit of reactor composition exports on described interval to be tested.If reference voltage, test occur during pressure
During the abnormal conditions such as voltage-phase deviation is excessive, control protective unit action, output of cutting off the electricity supply.
Phase-shifting transformer can realize voltage-phase in the range of 0 360 ° with angle, θ step-by-step adjustment, and (θ=60 °/2m is wherein
m≥1)。
Reference voltage and feedback voltage are detected by described control protective unit in real time, obtain phase difference θ between the two,
And shown by display.
The calculating that rounds up Δ θ/θ ratio rounds, and is set to K, then step-by-step adjustment phase-shifting transformer converts position of the switch K
Secondary, until Δ θ < θ.When Δ θ is more than θ, pressure regulator boost function locking, it is impossible to boosting；When Δ θ < during θ,
Pressure regulator boost function is open, can boost.
Described control protective unit possesses fracture voltage, busbar voltage and test voltage defencive function.
A) fracture voltage defencive function: when test voltage is excessive with reference voltage phase deviation, when exceeding unit protection definite value, protects
Protective function startup (when test voltage is less than Um/ √ 3, does not monitor phase contrast；When test voltage is more than Um/ √ 3, phase contrast
Protection act during Δ θ<being failure to actuate during θ, phase difference θ>θ)；When fracture voltage value exceedes the protection definite value that device sets,
Defencive function starts；
B) busbar voltage defencive function:
50 ± 0.5Hz scope is exceeded when monitoring bus frequency, or in the range of 50 ± 0.5Hz during sudden change, it is believed that bus frequency
Abnormal, defencive function starts；When busbar voltage fluctuation scope exceed per second ± 10% scope time, it is believed that busbar voltage is abnormal, protection
Function on.
C) test voltage defencive function:
When test voltage value exceedes the protection definite value that device sets, defencive function starts；When test voltage fluctuation range exceedes often
During second ± 10% scope, it is believed that test voltage is abnormal, defencive function starts；When test voltage generation flashover, defencive function starts.
Embodiment 3:
The schematic flow sheet of a kind of GIS voltage-withstand test method that Fig. 2 provides for the present embodiment.
The present embodiment provides this GIS voltage-withstand test method, when test, wherein: between interval to be measured and former operation GIS device
Disconnecting switch disconnect.
As it is shown on figure 3, the method includes below scheme:
S100: obtain bus reference voltage and test voltage.
Each bus is provided with voltage transformer, and voltage transformer has at least one low pressure winding, wherein: electricity
High pressure winding one end of pressure transformer is connected with bus, other end ground connection.By the low pressure winding of voltage transformer, it is possible to
Obtain the voltage on bus, by this voltage as the reference voltage, in order to test voltage is adjusted.
Obtain the test voltage on described interval to be measured, and utilize potentiometer that described test voltage is carried out sampling to obtain feedback voltage.
S200: compare busbar voltage and test voltage phase contrast, according to phase contrast output control phase-shifting transformer output change-over switch
Regulation, makes both phase contrasts minimum.
S300: the series resonant circuit that output voltage forms through pressure regulator, testing transformer and reactor is exported to be tested
On interval.
In the present embodiment, as it is shown on figure 3, step S200 specifically includes:
S201: busbar voltage compared with test voltage, obtains phase difference θ.
S202: Δ θ/θ ratio is carried out round calculating, draws result of calculation K.
S203: control phase-shifting transformer switch positions stepping K time.
S204: detection busbar voltage and test voltage phase difference θ in real time.
S205: judge that whether phase difference θ is less than phase-shifting transformer stepping phase theta.
S206: when phase contrast is more than stepping phase place, pressure regulator boost function locking, it is impossible to boosting.
S207: phase-shifting transformer is adjusted in place, pressure regulator boost function is open, exports satisfactory test voltage
Embodiment 4:
Fig. 4 controls protection flow chart for a kind of GIS pressure test that the present embodiment provides.In Fig. 4, GIS pressure test controls
Protection flow process includes:
Obtain reference voltage and test voltage.
Calculate test voltage and the magnitude of voltage of reference voltage, frequency values and phase contrast.
Obtain the rated voltage of equipment under test, default protection definite value.
Judge fracture voltage protection, busbar voltage protection, whether at least one meets protection act condition in test voltage protection.
When judged result is no, carry out step S500；When judged result is for being, carry out step S600.
Being unsatisfactory for protection act condition, power supply normally works.
Signal to signaling to pressure regulator, control pressure regulator on and off switch, deenergization.
Embodiment 5
As it is shown in figure 1, the connection diagram structural representation of GIS pressure-resistant test system that Fig. 1 provides for the present embodiment.Realize
Under adjacent part no cut-off condition, enlarging or maintenance interval are carried out pressure.
The present embodiment provides GIS Withstand test device to include phase-shifting transformer, pressure regulator, testing transformer, damping resistance, tune
Sense reactor, potentiometer and control protective unit；
Bus selected by this system can be any one in two buses, and PT is the voltage transformer being arranged on bus,
High pressure winding one end of PT is connected with bus, other end ground connection, and PT has at least one low pressure winding, and Cx is to be measured
Examination interval, and when test, the earthed switch in interval Cx to be tested is all off, and will be in addition to bus bar side disconnecting switch
Other disconnecting switch all close.
Reference voltage input terminal on control protective unit is connected with a low pressure winding of PT, low for obtaining one of PT
Voltage on pressure winding, and by the voltage of acquisition as the reference voltage；The test voltage input of control protective unit and potentiometer
The test lead of 6 is connected, and receives a feedback voltage.Phase shifting control end on control protective unit is connected with phase-shifting transformer,
Control protection port on control protective unit is connected with pressure regulator.
The power input of phase-shifting transformer 1 connects three-phase electrical source of power, and outfan is connected with the input of pressure regulator 2, pressure regulation
The outfan of device 2 and testing transformer 3 input, phase-shifting transformer 1 effect is the phase place according to reference voltage and test voltage
Difference regulates output voltage phase place so that output voltage phase place and busbar voltage are maintained in less scope；The work of pressure regulator 2
With being the buck control realizing voltage.
Testing transformer 3, damping resistance 4 and tune sense reactor 5 form series resonant equipment, its outfan and interval to be tested
The outlet casing tube of Cx is connected, and the equivalent capacity of series resonant equipment and interval Cx to be measured forms the condition of series resonance so that
This series resonant equipment can carry out transformation to output voltage, exports high test voltage on interval Cx to be tested.
The high-pressure side of potentiometer 6 and the outlet casing tube of interval Cx to be tested are connected, earth terminal ground connection, and the survey of potentiometer 6
Examination end is connected with the test voltage input of control protective unit 7, and the effect of potentiometer 6 is to treat the examination on test interval Cx
Electrical verification pressure is sampled, and as feedback voltage, the voltage after sampling is input to control protective unit 7.
Finally illustrating, above example is only in order to illustrate technical scheme and unrestricted, although with reference to preferably implementing
The present invention has been described in detail by example, it will be understood by those within the art that, can enter technical scheme
Row amendment or equivalent, without deviating from objective and the scope of the technical program, it all should contain the claim in the present invention
In the middle of scope.
Claims (6)
1. a GIS Withstand test device, it is characterised in that include phase-shifting transformer, pressure regulator, testing transformer, damping
Resistance, tune sense reactor, potentiometer and control protective unit；
Described control protective unit is used for receiving test voltage and reference voltage and being connected with phase-shifting transformer and pressure regulator respectively；Institute
State pressure regulator to be connected with phase-shifting transformer；Described pressure regulator is connected with testing transformer；Described potentiometer is connected with testing transformer；
Described potentiometer is connected with control protective unit；Described potentiometer and interval to be tested are also connected.
2. GIS Withstand test device as claimed in claim 1, it is characterised in that the described potentiometer damping electricity by concatenation
Resistance and tune sense reactor are connected with testing transformer.
3. GIS Withstand test device as claimed in claim 1, it is characterised in that described reference voltage is by being connected with bus
Voltage transformer obtain.
4. GIS Withstand test device as claimed in claim 2, it is characterised in that described control protective unit is with display even
Connect；Described display is for showing phase difference θ of reference voltage and feedback voltage.
5. GIS Withstand test device as claimed in claim 1, it is characterised in that the voltage-phase of described phase-shifting transformer exists
With angle, θ step-by-step adjustment in the range of 0-360 °, wherein, θ=60 °/2m, m >=1, m is integer.
GIS Withstand test device the most according to claim 2, it is characterised in that described control protective unit is provided with disconnected
Mouth voltage protection operating unit, busbar voltage protection operating unit and test voltage protection operating unit；Described fracture voltage is protected
Operating unit, for realizing fracture voltage protection act when test voltage reaches predetermined threshold value with reference voltage phase deviation；Institute
State busbar voltage protection operating unit, for realizing busbar voltage protection act when busbar voltage reaches predetermined threshold value；Described examination
Test voltage protection operation, for realizing test voltage protection act when test voltage reaches predetermined threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300694.XA CN105974280A (en) | 2016-05-09 | 2016-05-09 | GIS voltage holding test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300694.XA CN105974280A (en) | 2016-05-09 | 2016-05-09 | GIS voltage holding test device |
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| CN105974280A true CN105974280A (en) | 2016-09-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2020239815B2 (en) * | 2019-11-13 | 2021-09-09 | Shanghai Goalsee Electric Technology Co., Ltd. | A device for improving tuning stability of series resonance under small load |
| CN113504444A (en) * | 2021-09-13 | 2021-10-15 | 国网江西省电力有限公司电力科学研究院 | GIS is with multi-functional withstand voltage test frock |
| CN113985271A (en) * | 2021-11-04 | 2022-01-28 | 中铁武汉电气化局集团有限公司 | Subway GIS high-voltage switch cabinet system detection device and method |
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| AU2020239815B2 (en) * | 2019-11-13 | 2021-09-09 | Shanghai Goalsee Electric Technology Co., Ltd. | A device for improving tuning stability of series resonance under small load |
| CN113504444A (en) * | 2021-09-13 | 2021-10-15 | 国网江西省电力有限公司电力科学研究院 | GIS is with multi-functional withstand voltage test frock |
| CN113985271A (en) * | 2021-11-04 | 2022-01-28 | 中铁武汉电气化局集团有限公司 | Subway GIS high-voltage switch cabinet system detection device and method |
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