CN109617062A - A kind of adjusting circuit of the asterism side for three-phase alternating current electric loading - Google Patents
A kind of adjusting circuit of the asterism side for three-phase alternating current electric loading Download PDFInfo
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- CN109617062A CN109617062A CN201811601880.2A CN201811601880A CN109617062A CN 109617062 A CN109617062 A CN 109617062A CN 201811601880 A CN201811601880 A CN 201811601880A CN 109617062 A CN109617062 A CN 109617062A
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- circuit
- thyristor
- asterism
- alternating current
- phase alternating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention discloses a kind of adjusting circuits of asterism side for three-phase alternating current electric loading, its electric current for being used to adjust three-phase load circuit, the adjusting circuit includes: three electric signal sample circuits, is respectively used to be connected with the asterism side of three-phase load circuit to obtain the standard electric signal on three-phase load circuit；One control circuit is connected with three electric signal sample circuits, and exports three start pulse signals respectively according to the standard electric signal on three-phase load circuit；Three triggering driving circuits, one end is connected with the control circuit, the other end is connected with three electric signal sample circuits respectively, and the control circuit start pulse signal that sample circuit exports according to the electric signal controls the electric current on the triggering driving circuit adjusting respective load circuit.The present invention will trigger driving circuit and be connected in the asterism side of load circuit to adjust the electric current of load circuit, reduce impact failure of the mains by harmonics to triggering driving circuit under working condition.
Description
Technical field
The present invention relates to load currents to adjust field, and in particular to a kind of tune of the asterism side for three-phase alternating current electric loading
Economize on electricity road.
Background technique
With the development of industry, Harmonic in Power System causes power system accident also increasingly severe, it is clear that related work
Industry load test class applies more and more extensive, the especially starting of high power motor, and three-phase high-voltage alternating current large-power is negative at present
The power regulating method for carrying class is divided into multichannel using multiple contactors (high pressure vacuum contact frequently with by every phase load circuit
Device) parallel operation, bearing power size on demand carries out the mode of switching control to carry out, passes through the disconnection of load contactor
Carry out switching load with being attracted, needs ladder to add up to reach the bearing power size of demand then being attracted multiple contactors；Secondly,
Starting large-power motor scheme is usually that will control to adjust device (thyristor) to be serially connected between power grid and load motor,
Thyristor under this connection type is highly prone to the anti-electricity that mains by harmonics or power grid and motor are formed under working condition again
Kinetic potential impacts and causes to damage.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of for three-phase alternating current electric loading
Triggering driving circuit is connected in the asterism side of load circuit to adjust the electric current of load circuit, subtracted by the adjusting circuit of asterism side
Impact failure of the mains by harmonics to triggering driving circuit under small working condition.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of adjusting circuit of the asterism side for three-phase alternating current electric loading, is used to adjust the electricity of three-phase load circuit
Stream, the adjusting circuit include:
Three electric signal sample circuits are respectively used to be connected with the asterism side of three-phase load circuit to obtain threephase load
Standard electric signal on circuit；
One control circuit is connected with three electric signal sample circuits, and according to the mark on three-phase load circuit
Quasi- electric signal exports three start pulse signals respectively；
Three triggering driving circuits, one end are connected with the control circuit, the other end respectively with three telecommunications
Number sample circuit is connected, and the start pulse signal of control circuit sample circuit output according to the electric signal controls the touching
Send out the electric current on driving circuit adjusting respective load circuit.
Based on the above technical solution, the electric signal sample circuit includes:
Voltage transformer TV, it is in parallel with load circuit；
Current transformer TA, connects with load circuit.
Based on the above technical solution, the control circuit includes:
Single-chip microcontroller, input terminal are connected with three electric signal sample circuits, and output end and three triggerings are driven
Dynamic circuit is connected.
Based on the above technical solution, the triggering driving circuit includes at least one set of thyristor groups, the crystalline substance lock
Pipe group includes；
First thyristor SCR1；
Second thyristor SCR2, with the first thyristor SCR1 reverse parallel connection；And the first thyristor SCR1, institute
The control electrode for stating the second thyristor SCR2 is connected with the control circuit.
Based on the above technical solution, the thyristor groups further include:
One pulse transformer T, primary side are connected with the control circuit, primary side and first thyristor
SCR1, the control electrode of the second thyristor SCR2 are connected.
Based on the above technical solution, the triggering driving circuit includes two groups of thyristor groups, crystalline substance lock described in two groups
The series connection of pipe group.
Based on the above technical solution, it is described triggering driving circuit in the first thyristor SCR1 free state anode with
The electric signal sample circuit is connected, in the free state cathode of the first thyristor SCR1 and other the two triggering driving circuits
The free state cathode of first thyristor SCR1 is connected.
Based on the above technical solution, the thyristor groups further include:
RC protects circuit, in parallel with the first thyristor SCR1.
Based on the above technical solution, the first thyristor SCR1, the second thyristor SCR2 are high voltage
6500V thyristor.
Compared with the prior art, the advantages of the present invention are as follows:
The present invention provides a kind of adjusting circuit of asterism side for three-phase alternating current electric loading, and triggering driving circuit is connected
The electric current that load circuit is adjusted in the asterism side of load circuit, can continuously adjust the electric current for flowing through load, and reduction is working
Mains by harmonics is superimposed impact failure of the overvoltage to be formed to triggering driving circuit under state, improves the adjusting circuit and is applying
Security and stability in the process；Meanwhile the present invention also has the electric current on continuously linear adjusting load circuit from small to large, spirit
Activity meets the job requirement of various loading condition tests；Secondly, be one group by thyristor reverse parallel connection, it is positive and negative in alternating current
It can work on direction；Furthermore when the overtension of load circuit, between the shorted end and feedback end of triggering driving circuit
Thyristor groups equipped with a thyristor groups or more are to meet the requirement of its voltage rating.
Detailed description of the invention
Fig. 1 is a kind of circuit signal of the adjusting circuit of the asterism side for three-phase alternating current electric loading in the embodiment of the present invention
Figure；
Fig. 2 is the circuit diagram that two thyristor groups are connected in the embodiment of the present invention；
Specific embodiment
Clear, complete description is carried out below with reference to technical solution of the attached drawing to embodiment each in the present invention, it is clear that institute
The embodiment of description is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention,
Those of ordinary skill in the art's obtained all other embodiment without making creative work belongs to this
Invent protected range.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.It should be pointed out that all attached drawings are illustrative expression.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
Embodiment 1
Shown in Figure 1, the embodiment of the present invention provides a kind of adjusting circuit of asterism side for three-phase alternating current electric loading,
Its electric current for being used to adjust three-phase load circuit, the adjusting circuit include:
Three electric signal sample circuits are respectively used to be connected with the asterism side of three-phase load circuit to obtain threephase load
Standard electric signal on circuit；
One control circuit is connected with three electric signal sample circuits, and according to the mark on three-phase load circuit
Quasi- electric signal exports three start pulse signals respectively；
Three triggering driving circuits, one end are connected with the control circuit, the other end respectively with three telecommunications
Number sample circuit is connected, and the start pulse signal of control circuit sample circuit output according to the electric signal controls the touching
Send out the electric current on driving circuit adjusting respective load circuit.
The embodiment of the present invention provides a kind of adjusting circuit of asterism side for three-phase alternating current electric loading, and triggering is driven
Circuit is connected in the asterism side of load circuit to adjust the electric current of load circuit, reduces mains by harmonics under working condition and drives to triggering
The impact failure of circuit.
In the following, being illustrated with the phase in three-phase alternating current.
The electric signal sample circuit includes voltage transformer TV and current transformer TA；The voltage transformer TV and negative
Carry circuit in parallel；The current transformer TA connects with load circuit.The voltage transformer TV is parallel to the load circuit
On for obtaining the voltage of the load circuit and converting small voltage for the voltage；The current transformer TA is series at institute
It states the electric current on load circuit for obtaining the load circuit and converts low current for the electric current；The standard electric signal
Including the small voltage and the low current.
Further, the control circuit includes single-chip microcontroller, and input terminal and three electric signal sample circuits are homogeneous
Even, output end is connected with three triggering driving circuits.The single-chip microcontroller is according to voltage transformer TV and current transformer
The standard electric signal that TA is obtained exports start pulse signal.
As a kind of priority scheme of the embodiment of the present invention, the triggering driving circuit includes at least one set of thyristor groups；
The thyristor groups include the first thyristor SCR1 and the second thyristor SCR2；The second thyristor SCR2 and first crystalline substance
Brake tube SCR1 reverse parallel connection；And the control electrode of the first thyristor SCR1, the second thyristor SCR2 with the control
Circuit is connected.And RC protection circuit is also parallel on the first thyristor SCR1.Specifically, first thyristor
SCR1, the second thyristor SCR2 are high voltage 6500V thyristor.
The the first thyristor SCR1 and the second thyristor SCR2 of reverse parallel connection can effectively control alternating current, unrestricted
In the direction of alternating current, thyristor groups receive the start pulse signal of single-chip microcontroller output in control circuit, change the touching of thyristor
Hair phase shifting angle realizes the function turn off, open, adjusting electric current, to reach the size for controlling to adjust load circuit electric current.
Further, the thyristor groups further include a pulse transformer T, primary side and the control circuit phase
Even, primary side is connected with the control electrode of the first thyristor SCR1, the second thyristor SCR2；Wherein, the pulse
Transformer T is Isolated Pulse Transformer.
In the present embodiment, the triggering driving circuit includes one group of thyristor groups；The thyristor groups include first brilliant
Brake tube SCR1, the second thyristor SCR2, a pulse transformer T；The second thyristor SCR2 and first thyristor
SCR1 reverse parallel connection；And the control electrode of the first thyristor SCR1, the second thyristor SCR2 with the pulse transforming
The primary side of device T is connected, and the primary side of the pulse transformer T is connected with the control circuit；The first thyristor SCR1
Anode be connected with the load circuit by the current transformer TA, the cathode of the first thyristor SCR1 and other two institutes
The cathode for stating the first thyristor SCR1 in triggering driving circuit is connected.
In the present embodiment, due to the operating voltage of thyristor be have it is certain as defined in, be not any operational voltage level
It can meet, then just must can just be met the requirements with Thyristors in series mode, institute after the voltage of load circuit is high
Stating triggering driving circuit includes two groups of thyristor groups, the series connection of thyristor groups described in two groups.First is brilliant in the triggering driving circuit
The free state anode of brake tube SCR1 is connected with the electric signal sample circuit, the free state cathode of the first thyristor SCR1 and other
The free state cathode of the first thyristor SCR1 is connected in two triggering driving circuits.
Specifically, as shown in Fig. 2, a thyristor groups include the first thyristor SCR1, the second thyristor SCR2, a pulse
Transformer T1, another thyristor groups include the first thyristor SCR3, the second thyristor SCR4, a pulse transformer T2；It is described
Second thyristor SCR2 and the first thyristor SCR1 reverse parallel connection, the second thyristor SCR4 and first thyristor
SCR3 reverse parallel connection；
And the control electrode of the first thyristor SCR1, the second thyristor SCR2 are with the pulse transformer T1's
Primary side be connected, the first thyristor SCR3, the second thyristor SCR4 control electrode with the pulse transformer T2
Primary side be connected；The pulse transformer T1, the pulse transformer T2 primary side be connected with the control circuit；
The anode of the first thyristor SCR1 is connected by the current transformer TA with the load circuit, and first is brilliant
The cathode of brake tube SCR1 is connected with the anode of the first thyristor SCR3, the cathode of the first thyristor SCR3 and other two described touchings
The cathode for sending out the first thyristor SCR3 in driving circuit is connected.
Further, RC protection electricity is parallel on the first thyristor SCR1, the first thyristor SCR3
Road.
Load circuit described in the embodiment of the present invention refers to AC three-phase load circuit, it can be motor or other
Inductive load or ohmic load, are not limited to above embodiment.
The embodiment of the present invention provides a kind of adjusting circuit of asterism side for three-phase alternating current electric loading, and triggering is driven
Circuit is connected in the asterism side of load circuit to adjust the electric current of load circuit, can continuously adjust the electric current for flowing through load, reduces
Mains by harmonics is superimposed impact failure of the overvoltage to be formed to triggering driving circuit in the operating condition, improves the adjusting circuit
Security and stability in application process；Meanwhile the present invention also has the electricity on continuously linear adjusting load circuit from small to large
Stream, flexibility meet the job requirement of various loading condition tests；Secondly, being one group by thyristor reverse parallel connection, handing over
It can work in the positive negative direction of galvanic electricity；Furthermore when the overtension of load circuit, in the shorted end for triggering driving circuit and instead
The thyristor groups of thyristor groups or more are equipped between feedback end to meet the requirement of its voltage rating.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (9)
1. a kind of adjusting circuit of the asterism side for three-phase alternating current electric loading, which is characterized in that it is used to adjust threephase load
The electric current of circuit, the adjusting circuit include:
Three electric signal sample circuits are respectively used to be connected with the asterism side of three-phase load circuit to obtain three-phase load circuit
On standard electric signal；
One control circuit is connected with three electric signal sample circuits, and according to the standard electric on three-phase load circuit
Signal exports three start pulse signals respectively；
Three triggering driving circuits, one end are connected with the control circuit, and the other end takes with three electric signals respectively
Sample circuit is connected, and the control circuit start pulse signal that sample circuit exports according to the electric signal controls the triggering and drives
Dynamic circuit adjusts the electric current on respective load circuit.
2. the adjusting circuit of the asterism side according to claim 1 for three-phase alternating current electric loading, which is characterized in that described
Electric signal sample circuit includes:
Voltage transformer TV, it is in parallel with load circuit；
Current transformer TA, connects with load circuit.
3. the adjusting circuit of the asterism side according to claim 1 for three-phase alternating current electric loading, which is characterized in that described
Control circuit includes:
Single-chip microcontroller, input terminal are connected with three electric signal sample circuits, output end and three triggering driving electricity
Road is connected.
4. the adjusting circuit of the asterism side according to claim 1 for three-phase alternating current electric loading, which is characterized in that described
Triggering driving circuit includes at least one set of thyristor groups, and the thyristor groups include；
First thyristor SCR1；
Second thyristor SCR2, with the first thyristor SCR1 reverse parallel connection；And the first thyristor SCR1, described
The control electrode of two thyristor SCR2 is connected with the control circuit.
5. the adjusting circuit of the asterism side according to claim 4 for three-phase alternating current electric loading, which is characterized in that described
Thyristor groups further include:
One pulse transformer T, primary side are connected with the control circuit, primary side and the first thyristor SCR1, institute
The control electrode for stating the second thyristor SCR2 is connected.
6. the adjusting circuit of the asterism side according to claim 4 or 5 for three-phase alternating current electric loading, which is characterized in that
The triggering driving circuit includes two groups of thyristor groups, the series connection of thyristor groups described in two groups.
7. the adjusting circuit of the asterism side according to claim 4 for three-phase alternating current electric loading, which is characterized in that described
The free state anode of the first thyristor SCR1 is connected with the electric signal sample circuit in triggering driving circuit, the first thyristor
The free state cathode of SCR1 is connected with the free state cathode of the first thyristor SCR1 in other the two triggering driving circuits.
8. the adjusting circuit of the asterism side according to claim 4 for three-phase alternating current electric loading, which is characterized in that described
Thyristor groups further include:
RC protects circuit, in parallel with the first thyristor SCR1.
9. the adjusting circuit of the asterism side according to claim 4 for three-phase alternating current electric loading, which is characterized in that described
First thyristor SCR1, the second thyristor SCR2 are high voltage 6500V thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601880.2A CN109617062B (en) | 2018-12-26 | 2018-12-26 | Star point side adjusting circuit for three-phase alternating current load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601880.2A CN109617062B (en) | 2018-12-26 | 2018-12-26 | Star point side adjusting circuit for three-phase alternating current load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109617062A true CN109617062A (en) | 2019-04-12 |
| CN109617062B CN109617062B (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811601880.2A Active CN109617062B (en) | 2018-12-26 | 2018-12-26 | Star point side adjusting circuit for three-phase alternating current load |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101819A (en) * | 1975-01-06 | 1978-07-18 | Hitachi, Ltd. | Three phase controlling system |
| CN101675569A (en) * | 2007-05-18 | 2010-03-17 | Abb技术有限公司 | Static var compensator apparatus |
| CN102097984A (en) * | 2011-02-28 | 2011-06-15 | 高越农 | Quasi-saturated reactor high-voltage electric motor soft start device |
| CN104362649A (en) * | 2014-11-06 | 2015-02-18 | 国家电网公司 | Thyristor controlled transformer type controllable reactor direct-current component restraining device and method |
| CN104935183A (en) * | 2015-06-25 | 2015-09-23 | 西安工程大学 | Voltage transient variation compensation circuit charged by three-phase three-line transformerless phase voltage |
| CN205753426U (en) * | 2016-06-21 | 2016-11-30 | 湖南工程学院 | Electric power compensation system based on TSC |
-
2018
- 2018-12-26 CN CN201811601880.2A patent/CN109617062B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101819A (en) * | 1975-01-06 | 1978-07-18 | Hitachi, Ltd. | Three phase controlling system |
| CN101675569A (en) * | 2007-05-18 | 2010-03-17 | Abb技术有限公司 | Static var compensator apparatus |
| CN102097984A (en) * | 2011-02-28 | 2011-06-15 | 高越农 | Quasi-saturated reactor high-voltage electric motor soft start device |
| CN104362649A (en) * | 2014-11-06 | 2015-02-18 | 国家电网公司 | Thyristor controlled transformer type controllable reactor direct-current component restraining device and method |
| CN104935183A (en) * | 2015-06-25 | 2015-09-23 | 西安工程大学 | Voltage transient variation compensation circuit charged by three-phase three-line transformerless phase voltage |
| CN205753426U (en) * | 2016-06-21 | 2016-11-30 | 湖南工程学院 | Electric power compensation system based on TSC |
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| Publication number | Publication date |
|---|---|
| CN109617062B (en) | 2020-08-04 |
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