CN206235713U - A kind of breaker fracture dynamic electric voltage distribution measuring connection circuit - Google Patents
A kind of breaker fracture dynamic electric voltage distribution measuring connection circuit Download PDFInfo
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- CN206235713U CN206235713U CN201621100760.0U CN201621100760U CN206235713U CN 206235713 U CN206235713 U CN 206235713U CN 201621100760 U CN201621100760 U CN 201621100760U CN 206235713 U CN206235713 U CN 206235713U
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Abstract
The utility model discloses a kind of breaker fracture dynamic electric voltage distribution measuring connection circuit, using short-circuit generator, the power-supply system and high voltage capacitive load of transformer and its auxiliary equipment composition, apply power frequency ac voltage and DC voltage simultaneously at fracture two ends during breaker cuts wave filter, and access several general high-voltage bleeders and measure and record the voltage waveform of breaker correlated characteristic point, reach the purpose of measurement breaker voltage alternating current-direct current distribution situation between multi-break under alternating current-direct current superimposition condition, simultaneously by the method using parallel high voltage equivalent resistance gradation for surface pollution, measure the breaker fracture voltage alternating current-direct current distribution situation under filthy state.
Description
Technical field
The utility model is related to DC transmission system O＆M technical field, and in particular to a kind of breaker fracture alternating current-direct current is moved
State voltage's distribiuting situation measures connection circuit.
Background technology
Alternating current filter can reduce produce in alternating current-direct current conversion process humorous as one of the visual plant of current conversion station
Ripple, it is ensured that the quality of power supply is up to standard.And AC filter and breaker (hereinafter referred to as ACF breakers) is due to its special applied field
Close, capacitive load need to be cut off, switching is frequent, and interrupting process is subjected to alternating current-direct current mixed-voltage, and operating mode is more severe, compared to general
Logical breaker should have technical requirements higher.
When breaker cuts alternating current filter capacitive load, breaker fracture ac bus side is AC sine wave, load-side
It is a DC voltage, the lower waveform that can form 1-cos θ of alternating current-direct current superposition, (China is 10ms) arrival in a power frequency half-wave
Peak value.Under the conditions of different filths, its combined-voltage distribution situation and transient process and voltage change process not phase
Together.At present, international standard, domestic standard and professional standard to breaker insulation examination only consider clean state under or
Connecting-disconnecting function and insulating properties under the low filthy level of person, not to disconnected under extreme environmental conditions or under the conditions of heavy pollution
Road device fracture voltage distribution is estimated, so also without corresponding test method and test connection loop.The table of breaker
Face filth state it is serious to a certain extent after, it would be possible to its fracture, more uniform voltage's distribiuting brings subversive shadow originally
Ring, so as to influence the overall break performance of breaker and insulating properties.
Utility model content
For correct measurement alternating current-direct current dynamic electric voltage distribution situation between breaker fracture, one of the purpose of this utility model
It is that a kind of breaker fracture dynamic electric voltage distribution measuring connection circuit is provided, fracture voltage distribution situation is studied, visits
The determination of rope engineering parameter of alternating current filter breaker under complex environment operating mode.
To achieve the above object, the technical scheme that the utility model is taken is as follows,
A kind of breaker fracture dynamic electric voltage distribution measuring connection circuit, includes：
Large Copacity short-circuit generator G, is used to simulate electric power system power source, offer Large Copacity power supply in short-term；
Step-up transformer T, its primary side series connection Large Copacity short-circuit generator G, primary side be sequentially connected in series breaker protector AB,
Alternating current filter breaker T0 and capacitive load C；
Large Copacity short-circuit generator G is also in series with closing switch HK and protective breaker CD；
Protective breaker AB two ends filth equiva lent impedance Z1 in parallel, alternating current filter is in parallel dirty with breaker T0 two ends
Dirty equiva lent impedance Z2；
In public one end for being terminated with divider V2 of filthy equiva lent impedance Z1 and filthy equiva lent impedance Z2, filthy equivalent
Another one end for being terminated with divider V1 of impedance Z 1, in another one end for being terminated with divider V3 of filthy equiva lent impedance Z2,
Each the other end is grounded for the divider V1, divider V2, divider V3, and the divider V2 is parallel with filthy equiva lent impedance
Z3。
Further, the alternating current filter breaker T0 is 550kV and above porcelain knob breaker, the porcelain
Column type circuit breaker includes at least two fractures.
Further, the capacitive load C includes Capacitor stack and load resistance.
Further, the divider V1, divider V2 and divider V3 use capacitance-resistance series-parallel connection partial pressure mode.
Compared with prior art, the utility model utilizes short-circuit generator, transformer and its auxiliary equipment to the utility model
Power-supply system and the high voltage capacitive load of composition, at fracture two ends while applying power frequency during breaker cuts wave filter
Alternating voltage and DC voltage, and access several general high-voltage bleeders and measure and record the electricity of breaker correlated characteristic point
Corrugating, reaches the purpose of measurement breaker alternating current-direct current dynamic electric voltage distribution situation between multi-break under alternating current-direct current superimposition condition.
Simultaneously by the method using parallel high voltage equivalent resistance gradation for surface pollution, the breaker fracture alternating current-direct current under filthy state is measured
The distribution situation of dynamic electric voltage.
Brief description of the drawings
Fig. 1 is the schematic diagram that breaker of the present utility model cuts wave filter test connection loop；
Fig. 2 is a kind of workflow diagram of breaker fracture dynamic electric voltage distribution measuring connection circuit of the present utility model；
Fig. 3 is the alternating voltage distribution situation experiment oscillogram of two fractures；
Fig. 4 a are the test waveform figure of filthy condition breaker fracture alternating current-direct current dynamic electric voltage distribution situation once；
Fig. 4 b are the test waveform figure of the breaker fracture alternating current-direct current dynamic electric voltage distribution situation under filthy condition two.
Specific embodiment
Content of the present utility model is described in further details with reference to the accompanying drawings and detailed description.
Refer to shown in Fig. 1, a kind of breaker fracture dynamic electric voltage distribution measuring wiring of the utility model embodiment is returned
Road, includes：
Large Copacity short-circuit generator G, is used to simulate electric power system power source, offer Large Copacity power supply in short-term；
Step-up transformer T, its primary side series connection Large Copacity short-circuit generator G, primary side be sequentially connected in series breaker protector AB,
Alternating current filter breaker T0 and capacitive load C；The step-up transformer T can improve the output voltage of pilot system, make
The voltage level of pilot system can reach each voltage level that research needs, such as the rated voltage level of breaker；
Large Copacity short-circuit generator G is also in series with closing switch HK and protective breaker CD；
Protective breaker AB two ends filth equiva lent impedance Z1 in parallel, alternating current filter is in parallel dirty with breaker T0 two ends
Dirty equiva lent impedance Z2；
In public one end for being terminated with divider V2 of filthy equiva lent impedance Z1 and filthy equiva lent impedance Z2, filthy equivalent
Another one end for being terminated with divider V1 of impedance Z 1, in another one end for being terminated with divider V3 of filthy equiva lent impedance Z2,
Each the other end is grounded for the divider V1, divider V2, divider V3, and the divider V2 is parallel with filthy equiva lent impedance
Z3。
Used as specific embodiment, the alternating current filter breaker T0 is 550kV and above porcelain knob is disconnected
Road device, the porcelain knob breaker includes at least two fractures.
Used as specific embodiment, the capacitive load C includes Capacitor stack and load resistance, in the effect of AC power
Lower capacitive load C produces capacity current, and the load-side that DC voltage is applied to breaker is provided after breaker cut-offs.
Further, using capacitance-resistance series-parallel connection partial pressure mode, its specification is for the divider V1, divider V2 and divider V3：
Rated voltage 750kV, rated capacitance 400pF.
Described protective breaker CD is low-pressure side protective breaker, and protective breaker AB is high-pressure side protective breaker.
It is a kind of work of breaker fracture dynamic electric voltage distribution measuring connection circuit of the utility model embodiment referring to Fig. 2
Make schematic flow sheet, idiographic flow is as follows：
D.C. resistance of the step 1. to breaker T0 under varying environment operating mode is measured；
Step 2. breaker T0 keeps separating brake, and protective breaker AB, CD keep closing a floodgate before experiment, firing test, great Rong
After amount short-circuit generator G boosts to predetermined value, closing switch HK closes a floodgate, and measures exchange on 3 divider V1, V2, V3 respectively
Voltage, after keeping voltage waveform at least 100ms, protective breaker T0 separating brakes, the test voltage waveform during record, by reading
The virtual value of the alternating voltage that 3 divider V1, V2, V3 are measured, the AC compounent of at least two fracture voltages when obtaining experiment
Distribution relation；
Keep closing a floodgate before step 3. breaker T0, protective breaker AB, CD experiment, firing test, Large Copacity short circuit generates electricity
After machine G boosts to predetermined value, closing switch HK closes a floodgate, and connects low-pressure side and high-pressure side test loop.Subsequent breaker T0 separating brakes,
Capacity current is cut-off, the mains side and load-side at breaker T0 two ends produce alternating voltage and DC voltage respectively, by 3
Voltage waveform is measured on divider V1, V2, V3, after rear voltage waveform at least 300ms is cut-off in holding, protective breaker AB, CD point
Lock, off-test；
Step 4. uses different filthy equivalent resistance Z1, Z2, Z3, repeats above step 1 to 3, measures different filths etc.
Fracture combined-voltage distribution situation under effect environmental condition.
Used as a specific embodiment, the Measuring DC Resistance of the step 1 is：Apply straight in one end of breaker
Stream voltage, the other end accesses ammeter and carries out reading, and D.C. resistance is obtained according to DC voltage and electric current.
As a specific embodiment, the step 4 using the method by manually defiling change filthy equiva lent impedance Z1,
Z2、Z3。
Test examples as this practicality are measured using certain experiment station 500kV breaker alternating current-direct current dynamic electric voltages distribution situation below
The explanation of new beneficial effect.
According to GB 1984-2014《High-voltage AC breaker》Experiment on capacitive current switching test in clause 6.111
The requirement of method, the test voltage of capacitive current switching test, for single-phase experiment, is system phase voltage and capacitive voltage coefficient
Product, for the breaker test item of 500kV rated voltages, line voltage is 550kV, and phase voltage is 550/ √ 3=318kV,
Test voltage when capacitive voltage coefficient is 1.2 is 318 × 1.2=381.6kV.
When testing above-mentioned breaker, voltage's distribiuting is measured and is corrected in four steps, and finally drawn
Distribution results.
First, each fracture direct current resistance m easurem ents of breaker T0
By manually defiling etc., D.C. resistance of the method to breaker under varying environment operating mode is measured, in breaker
One end of T0 applies DC voltage, and the other end accesses ammeter and carries out reading.
Secondly, breaker T0 alternating voltages distribution situation measurement
Alternating voltages of the breaker T0 to its each Fracture Characteristics point under gate-dividing state is measured.Breaker T0 is in experiment
In be always maintained at gate-dividing state, by the boosted transformer of short-circuit generator to breaker T0 apply ac test voltage, to each point
Voltage waveform recorded.
Then, breaker T0 combined-voltages combined measurement
Breaker T0 cuts capacitive load, and the alterating and direct current corrugating to its each Fracture Characteristics point is measured.Breaker is tried
Preceding "on" position is tested, separating brake is controlled in test, capacitive load currents are cut-off, the voltage waveform to each point is remembered
Record, referring to Fig. 3.
Finally, change the filthy equivalent resistance of breaker, and repeat above step, measure different filthy conditions referring to Fig. 4 a
With Fig. 4 b under the conditions of two kinds of filths, i.e., the breaker fracture alternating current-direct current dynamic electric voltage of different filthy equivalent resistances combinations is distributed feelings
The test waveform figure of condition, off-test.
Above-described embodiment simply to illustrate that technology design of the present utility model and feature, the purpose is to be to allow this area
Interior those of ordinary skill will appreciate that content of the present utility model and implements according to this, can not limit of the present utility model with this
Protection domain.The equivalent change or modification that every essence according to the utility model content is made, should all cover in this reality
With in new protection domain.
Claims (4)
1. a kind of breaker fracture dynamic electric voltage distribution measuring connection circuit, it is characterised in that include：
Large Copacity short-circuit generator G, is used to simulate electric power system power source, offer Large Copacity power supply in short-term；
Step-up transformer T, its primary side series connection Large Copacity short-circuit generator G, primary side is sequentially connected in series breaker protector AB, exchange
Wave filter breaker T0 and capacitive load C；
Large Copacity short-circuit generator G is also in series with closing switch HK and protective breaker CD；
Protective breaker AB two ends filth equiva lent impedance Z1 in parallel, alternating current filter breaker T0 two ends parallel connection filth etc.
Effect impedance Z 2；
In public one end for being terminated with divider V2 of filthy equiva lent impedance Z1 and filthy equiva lent impedance Z2, in filthy equiva lent impedance
Another one end for being terminated with divider V1 of Z1, it is described in another one end for being terminated with divider V3 of filthy equiva lent impedance Z2
Each the other end is grounded for divider V1, divider V2, divider V3, and the divider V2 is parallel with filthy equiva lent impedance Z3.
2. breaker fracture dynamic electric voltage distribution measuring connection circuit according to claim 1, it is characterised in that the friendship
Stream wave filter breaker T0 is 550kV and above porcelain knob breaker, and the porcelain knob breaker is included at least
Two fractures.
3. breaker fracture dynamic electric voltage distribution measuring connection circuit according to claim 1, it is characterised in that the appearance
Property load C includes Capacitor stack and load resistance.
4. breaker fracture dynamic electric voltage distribution measuring connection circuit according to claim 1, it is characterised in that described point
Depressor V1, divider V2 and divider V3 use capacitance-resistance series-parallel connection partial pressure mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621100760.0U CN206235713U (en) | 2016-09-30 | 2016-09-30 | A kind of breaker fracture dynamic electric voltage distribution measuring connection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621100760.0U CN206235713U (en) | 2016-09-30 | 2016-09-30 | A kind of breaker fracture dynamic electric voltage distribution measuring connection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206235713U true CN206235713U (en) | 2017-06-09 |
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ID=58982067
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|---|---|---|---|
| CN201621100760.0U Active CN206235713U (en) | 2016-09-30 | 2016-09-30 | A kind of breaker fracture dynamic electric voltage distribution measuring connection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206235713U (en) |
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2016
- 2016-09-30 CN CN201621100760.0U patent/CN206235713U/en active Active
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