CN201909819U - Compound type power filter tester - Google Patents
Compound type power filter tester Download PDFInfo
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- CN201909819U CN201909819U CN2010205472928U CN201020547292U CN201909819U CN 201909819 U CN201909819 U CN 201909819U CN 2010205472928 U CN2010205472928 U CN 2010205472928U CN 201020547292 U CN201020547292 U CN 201020547292U CN 201909819 U CN201909819 U CN 201909819U
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Abstract
The utility model discloses a compound type power filter tester which comprises a power source end, a load end, an in-series filter branch and an in-parallel filter branch, wherein the power source end and the load end are externally connected with nonlinear electrical equipment to be tested, one end of the in-series filter branch is connected with the power source end, the other end of the in-series filter branch is connected with the load end, an on-off switch is arranged between two ends of the in-series filter branch, so that the two ends of the in-series filter branch can be short circuit, one end of the in-parallel filter branch can be respectively connected with the power source end or the load end by the on-off switch, and the other end of the in-parallel filter branch is grounded. Due to the combination of the different statuses of the on-off switch, the passive filter circuit with different structures can be obtained. After the tester and the testing method of the compound type power filter are used, the requirement of the engineering test of the passive power filter can be met, and the multipurpose power filter test can be achieved by a set of power filter tester.
Description
Technical field
The utility model relates to the harmonic wave control technology, specifically a kind of combined type electric filtering test unit and method thereof.
Background technology
Non-linear electrical equipment as the extensive application of power electronic equipments such as power rectifier, inverter, variable-frequency power sources, causes the serious day by day of Harmonious Waves in Power Systems harm.Usually insert passive power filter at power end or load end, realize that the electric harmonic under the power system mesomeric state suppresses or compensation, also realize the compensation of reactive power simultaneously by passive power filter.
Passive power filter structurally mainly is made up of filter branch in parallel, different filter branch filterings high order current harmonics correspondingly.At present in the engineering design of passive power filter, filter branch mainly contains: the single tuning filter branch that is composed in series by electric capacity and inductance; The single order high-pass filtering branch road of forming by electric capacity; These three types of the second order high-pass filtering branch roads that composes in parallel by electric capacity, inductance and resistance string.Realize the inhibition or the compensation of electric system particular harmonic by the various combination of these three types of filter branch.
As the passive electric filtering test unit that experimental study and engineering test are used, all are stationary installations that the circuit topology of single branch road or combined finger can not be changed so far.This circuit structure that can not change has caused must manually be disassembled in electric filtering test or process of the test and the difficulty of combinational circuit again.
The utility model content
In order to overcome the problem in the above-mentioned background technology, the utility model proposes a kind of combined type electric filtering test unit, by the combination of different on off operating modes of control on-off switch, can obtain the circuit structure of passive power filter of different nature.
In order to achieve the above object, the technical solution of the utility model is as follows:
A kind of combined type electric filtering test unit comprises outer power end and load end of receiving the non-linear electrical equipment of test, also comprises:
One series connection filter branch, described series filtering branch road one end connects power end, and the other end connects load end, is provided with an on-off switch between the two ends of described series filtering branch road, can be with described series filtering branch road shorted on both ends;
One filter branch in parallel, an end of described filter branch in parallel can connect power end or load end respectively by on-off switch, the other end ground connection of described filter branch in parallel.
Said structure can be led directly to (filtering free circuit) by the combination of the different on off operating modes of on-off switch, the series filtering circuit, filtering circuit in parallel, the filtering circuit in parallel of band power end reactor, five kinds of passive power filter circuit structures of different nature of the filtering circuit in parallel of bringing onto load end reactor.
Described filter branch in parallel comprises an adjustable condenser, one REgulatable reactor and an adjustable resistor, one end of described adjustable condenser connects described power end or load end by on-off switch, the other end connects described REgulatable reactor, described REgulatable reactor ground connection, described adjustable resistor by an on-off switch can with described REgulatable reactor place in circuit in parallel, connect an on-off switch between the described REgulatable reactor two ends.
Described filter branch in parallel can obtain single tuning filtering parallel branch by the combination of the different on off operating modes of on-off switch, single order high pass filter branch in parallel, three kinds of filter branch structures in parallel of different nature of the high pass filter branch road in parallel of second order.
Described on-off switch can be that contact mechanical type isolating switch is arranged, and also can be contactless electron formula isolating switch, and the latter can realize the automatic switchover of the filter circuit construction of test unit.
Above-mentioned combined type electric filtering test unit, combination according to switch, can obtain the passive filter circuit of different structure, the test unit of the combined type electric-power filter of Gou Chenging thus, satisfy the demand of the engineering test of passive electric filtering, realize that a cover electric filtering test unit reaches the purpose of multi-usage electric filtering test.
Description of drawings
Fig. 1 is the circuit structure diagram of combined type electric filtering test unit of the present utility model.
Fig. 2 is straight-through (filtering free circuit) structural drawing of the present utility model.
Fig. 3 is a series filtering circuit structure diagram of the present utility model.
Fig. 4 is filter circuit construction figure in parallel of the present utility model.
Fig. 5 is a single tuning filter branch structural drawing of the present utility model.
Fig. 6 is a single order high-pass filtering branch road structural drawing of the present utility model.
Fig. 7 is a second order high-pass filtering branch road structural drawing of the present utility model.
Fig. 8 is the filter circuit construction figure in parallel of band power end reactor of the present utility model.
Fig. 9 is the single tuning filter branch structural drawing of band power end reactor of the present utility model.
Figure 10 is the single order high-pass filtering branch road structural drawing of band power end reactor of the present utility model.
Figure 11 is the second order high-pass filtering branch road structural drawing of band power end reactor of the present utility model.
Figure 12 is the filter circuit construction figure in parallel of bringing onto load end reactor of the present utility model.
Figure 13 is the single tuning filter branch structural drawing of bringing onto load end reactor of the present utility model.
Figure 14 is the single order high-pass filtering branch road structural drawing of bringing onto load end reactor of the present utility model.
Figure 15 is the second order high-pass filtering branch road structural drawing of bringing onto load end reactor of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete accompanying drawing, further set forth the utility model.
Shown in Figure 1 is the circuit diagram of combined type electric filtering test unit of the present utility model, as shown in Figure 1, combined type electric filtering test unit of the present utility model, the power end 15 and the load end 16 that comprise the non-linear electrical equipment of outer reception test, power end 15 is connected power end harmonic wave detection module 12, load end harmonic wave detection module 13 respectively with load end 16, also comprise series filtering branch road 6, series filtering branch road 6 is by REgulatable reactor 8 (L
SBe inductance value, R
SBe internal resistance value) form, be provided with an on-off switch 1 between the two ends of series filtering branch road 6;
12,13, the 14 harmonic wave detection modules that are respectively power end, load end, parallel branch end.
The combination of the different on off operating modes by 1,2,3 on-off switches can obtain five kinds of passive power filter circuit structures of different nature, and is as shown in table 1.
Table 1
The combination of the different on off operating modes by 4,5 on-off switches can obtain three kinds of filter branch structures in parallel of different nature, and is as shown in table 2.
Table 2
According to the combination of the switch shown in table 1 and the table 21,2,3 and 4,5, can obtain the passive filter circuit of 11 kinds of different structures:
(1) straight-through (filtering free circuit)
Close under (ON), switch 2 disconnected (OFF), switch 3 disconnected (OFF) states at switch 1, excised filtering circuit, as shown in Figure 2.
(2) series filtering circuit
Under switch 1 disconnected (OFF), switch 2 disconnected (OFF), switch 3 disconnected (OFF) states, filtering circuit is a current-limiting reactor, as shown in Figure 3.
(3) filtering circuit in parallel
Close (ON), switch 2 at switch 1 and close under (ON), switch 3 disconnected (OFF) states, or close (ON), switch 2 disconnected (OFF) at switch 1, switch 3 closes under (ON) state, filtering circuit is a parallel branch, as shown in Figure 4.
In this case, by switch 4 and 5 different switchings, obtain following three kinds of filter branch:
1. under switch 4 disconnected (OFF), switch 5 disconnected (OFF) states, filtering circuit in parallel is the single tuning filter branch, as shown in Figure 5.
2. close under (ON) state at switch 5, filtering circuit in parallel is a single order high-pass filtering branch road, as shown in Figure 6.
3. close under (ON), switch 5 disconnected (OFF) states at switch 4, filtering circuit in parallel is a second order high-pass filtering branch road, as shown in Figure 7.
(4) filtering circuit in parallel of band power end reactor
Close under (ON), switch 3 disconnected (OFF) states at switch 1 disconnected (OFF), switch 2, filtering circuit is the filtering circuit in parallel of band power end reactor, as shown in Figure 8.
The filtering circuit in parallel of band power end reactor not only has the function of above-mentioned (3), simultaneously, has absorbed the fractional harmonic voltage of power end by reactor.In this case, by switch 4 and 5 different switchings, obtain following three kinds of filter branch:
1. under switch 4 disconnected (OFF), switch 5 disconnected (OFF) states, filtering circuit is the single tuning filter branch of band power end reactor, as shown in Figure 9.
2. close under (ON) state at switch 5, filtering circuit is the single order high-pass filtering branch road of band power end reactor, as shown in figure 10.
3. close under (ON), switch 5 disconnected (OFF) states at switch 4, filtering circuit is the second order high-pass filtering branch road of band power end reactor, as shown in figure 11.
(5) filtering circuit in parallel of bringing onto load end reactor
At switch 1 disconnected (OFF), switch 2 disconnected (OFF), switch 3 with (ON) under the state, filtering circuit is the filtering circuit in parallel of bringing onto load end reactor, as shown in figure 12.
The filtering circuit in parallel of bringing onto load end reactor not only has the function of above-mentioned (3), simultaneously, has absorbed the fractional harmonic voltage of load end by reactor.In this case, by switch 4 and 5 different switchings, obtain following three kinds of filter branch:
1. under switch 4 disconnected (OFF), switch 5 disconnected (OFF) states, filtering circuit is the single tuning filter branch of bringing onto load end reactor, as shown in figure 13.
2. close under (ON) state at switch 5, filtering circuit is the single order high-pass filtering branch road of bringing onto load end reactor, as shown in figure 14.
3. close under (ON), switch 5 disconnected (OFF) states at switch 4, filtering circuit is the second order high-pass filtering branch road of bringing onto load end reactor, as shown in figure 15.
This combined type electric-power filter test unit test mainly to as if external the waiting of power end try non-linear power equipment, or external the waiting of load end try nonlinear load equipment, during test, can carry out as follows respectively:
(1) straight-through (filtering free circuit)
Close under (ON), switch 2 disconnected (OFF), switch 3 disconnected (OFF) states at switch 1, excised filtering circuit, as shown in Figure 2.At this moment, power end and load end are same port.Harmonic wave detection module by 12 or 13 can be tested and observe and not insert under the filter status, by non-linear power or higher hamonic wave (voltage, the current harmonics) waveform and the Harmonic Distribution state thereof that are produced by nonlinear load.
(2) series filtering circuit
Under switch 1 disconnected (OFF), switch 2 disconnected (OFF), switch 3 disconnected (OFF) states, filtering circuit is a current-limiting reactor, as shown in Figure 3.At this moment, between power end and load end, inserted current-limiting reactor.By 12 among Fig. 3 and 13 harmonic wave detection modules, can be respectively in power end and load end test and observe and inserting under the current-limiting reactor effect, the high order voltage harmonic component that produces by non-linear power or by nonlinear load is with adjustable electric sensibility reciprocal L
SAbsorbed by current-limiting reactor with being in proportion.
(3) filtering circuit in parallel
Close (ON), switch 2 at switch 1 and close under (ON), switch 3 disconnected (OFF) states, or close (ON), switch 2 disconnected (OFF) at switch 1, switch 3 closes under (ON) state, filtering circuit is a parallel branch, as shown in Figure 4.At this moment, between power end and load end, inserted filtering circuit in parallel.Harmonic wave detection module by 12,13,14, can be respectively in power end, load end and the test of parallel branch end and observe and inserting under the filtering circuit effect in parallel, by non-linear power or the high order current harmonics waveform and the Harmonic Distribution state thereof that produce by nonlinear load.
1. under switch 4 disconnected (OFF), switch 5 disconnected (OFF) states, filtering circuit in parallel is the single tuning filter branch, as shown in Figure 5.Control capacittance amount C
PWith inductance value L
P, can obtain the pairing resonance frequency nf of nth harmonic, in the higher harmonic current by power end or load end generation, the n time the characteristic harmonics electric current is absorbed by this filter branch in parallel at this moment.Meanwhile, can realize reactive power compensation to main circuit.
2. close under (ON) state at switch 5, filtering circuit in parallel is a single order high-pass filtering branch road, as shown in Figure 6.Control capacittance amount C
P, obtaining under cutoff frequency nf, in the higher harmonic current by power end or load end generation, the n time characteristic harmonics electric current and n above harmonic current are absorbed by this filter branch in parallel.
3. close under (ON), switch 5 disconnected (OFF) states at switch 4, filtering circuit in parallel is a second order high-pass filtering branch road, as shown in Figure 7.Control capacittance amount C
PWith inductance value L
P, regulate resistance R simultaneously, obtain under cutoff frequency nf, in the higher harmonic current by power end or load end generation, the n time characteristic harmonics electric current and n above harmonic current are absorbed by this filter branch in parallel.
(4) filtering circuit in parallel of band power end reactor
Close under (ON), switch 3 disconnected (OFF) states at switch 1 disconnected (OFF), switch 2, filtering circuit is the filtering circuit in parallel of band power end reactor.As shown in Figure 8.At this moment, between power end and load end, inserted band power end reactor filtering circuit in parallel.By harmonic wave detection module 12,13,14, can be respectively in power end, load end and the test of parallel branch end and observe and inserting under the filtering circuit effect in parallel of band power end reactor, by non-linear power or higher hamonic wave (electric current, the voltage harmonic) waveform and the Harmonic Distribution state thereof that produce by nonlinear load.
By 1. 2. 3. same adjustment method in above-mentioned (3), can under difference filter branch situation in parallel,, carry out the filtering test as single tuning filter branch, single order high-pass filtering branch road, second order high-pass filtering branch road (being respectively Fig. 9, Figure 10 and shown in Figure 11).
(5) filtering circuit in parallel of bringing onto load end reactor
Close under (ON) state at switch 1 disconnected (OFF), switch 2 disconnected (OFF), switch 3, filtering circuit is the filtering circuit in parallel of bringing onto load end reactor, as shown in figure 12.At this moment, between power end and load end, inserted bringing onto load end reactor filtering circuit in parallel.By harmonic wave detection module 12,13,14, can be respectively in power end, load end and the test of parallel branch end and observe and inserting under the filtering circuit effect in parallel of bringing onto load end reactor, by non-linear power or higher hamonic wave (electric current, the voltage harmonic) waveform and the Harmonic Distribution state thereof that produce by nonlinear load.
By 1. 2. 3. same adjustment method in above-mentioned (3), can under difference filter branch situation in parallel,, carry out the filtering test as single tuning filter branch, single order high-pass filtering branch road, second order high-pass filtering branch road (being respectively Fig. 9, Figure 10 and shown in Figure 11).
Above-mentioned combined type electric filtering test unit with the switching combining of different passive filter circuits, realizes that a cover electric filtering test unit reaches the purpose of multi-usage electric filtering test.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a combined type electric filtering test unit comprises outer power end and load end of receiving the non-linear electrical equipment of test, it is characterized in that, also comprises:
One series connection filter branch, described series filtering branch road one end connects power end, and the other end connects load end, is provided with an on-off switch between the two ends of described series filtering branch road, can be with described series filtering branch road shorted on both ends;
One filter branch in parallel, an end of described filter branch in parallel can connect power end or load end respectively by on-off switch, the other end ground connection of described filter branch in parallel.
2. combined type electric filtering test unit according to claim 1, it is characterized in that, described filter branch in parallel comprises an adjustable condenser, one REgulatable reactor and an adjustable resistor, one end of described adjustable condenser connects described power end or load end by on-off switch, the other end connects described REgulatable reactor, described REgulatable reactor ground connection, described adjustable resistor by an on-off switch can with described REgulatable reactor place in circuit in parallel, connect an on-off switch between the described REgulatable reactor two ends.
3. combined type electric filtering test unit according to claim 1 is characterized in that, described on-off switch is that contact mechanical type isolating switch is arranged.
4. combined type electric filtering test unit according to claim 1 is characterized in that, described on-off switch is a contactless electron formula isolating switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205472928U CN201909819U (en) | 2010-09-29 | 2010-09-29 | Compound type power filter tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205472928U CN201909819U (en) | 2010-09-29 | 2010-09-29 | Compound type power filter tester |
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| CN201909819U true CN201909819U (en) | 2011-07-27 |
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| CN2010205472928U Expired - Fee Related CN201909819U (en) | 2010-09-29 | 2010-09-29 | Compound type power filter tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995528A (en) * | 2010-09-29 | 2011-03-30 | 上海海事大学 | Compound power filter test device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995528A (en) * | 2010-09-29 | 2011-03-30 | 上海海事大学 | Compound power filter test device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20120929 |