CN105743368B - A kind of instruction current generating algorithm of three-phase phase control rectifier bridge load simulation - Google Patents
A kind of instruction current generating algorithm of three-phase phase control rectifier bridge load simulation Download PDFInfo
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- CN105743368B CN105743368B CN201610228723.6A CN201610228723A CN105743368B CN 105743368 B CN105743368 B CN 105743368B CN 201610228723 A CN201610228723 A CN 201610228723A CN 105743368 B CN105743368 B CN 105743368B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
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Abstract
The present invention relates to a kind of instruction current generating algorithm of three-phase phase control rectifier bridge load simulation, technical characterstic is the boundary condition in six conducting sections in a primitive period for comprise steps of determining that three-phase phase control rectifier bridge；It determines the decision condition of different circuit working states in six conducting sections and obtains corresponding circuit equation；The circuit equation that section is connected to six carries out discretization solution using backward difference method, obtains the instruction current of three-phase phase control rectifier bridge.The present invention provides instruction current generating algorithm for the load of three-phase phase control rectifier bridge, it increases existing power electronics and loads the loadtype that can be simulated, improve the ability of power electronics load simulation nonlinear load, and accuracy in computation is higher, it can satisfy simulation precision requirement, it can be widely applied in power electronics load simulation nonlinear load characteristic, can preferably test power supply load capacity.
Description
Technical field
The present invention relates to three-phase phase control rectifier bridge technologies, and in particular to a kind of instruction of three-phase phase control rectifier bridge load simulation
Electric current generating algorithm.
Background technique
Electrical energy devices (alternating current steady voltage plug, UPS, switch DC power supply, AC motor drive etc.) all need when leaving the factory
Stringent senile experiment is carried out according to standard requirements and relevant dynamic, stable state band carry experiment, to guarantee the matter of power-supply device
Amount.The method of tradition examination power supply is to select the combination of resistance, inductance and capacitor negative as resistive, resistance sense or capacitance-resistance
It carries, selects uncontrollable rectifier bridge as nonlinear load.This method is clearly present that power consumption is big, load is not flexible, automation
The disadvantages such as degree is low, thus it is a kind of flexibly, green, efficient experimental rig-power electronics load comes into being.
The characteristic that inputing power is loaded according to power electronics, can be classified as direct current power electronic load and AC power
Electronic load.Wherein direct current power electronic load is for testing DC power supply, such as dc generator, battery；AC power
Electronic load is for testing AC power source, such as alternating current steady voltage plug, uninterruptible power supply, AC motor drive.For direct current
The research comparative maturity of power electronics load, market product are more；And the research of AC power electronic load is relatively fewer, also deposits
In some problems with to be solved, such as: the instruction current generating algorithm of nonlinear load simulation, is handed over current follow-up control strategy
Galvanic electricity machine analogy method etc..
The most common structural topology of AC power electronic load is back-to-back converter, and be tested source side is referred to as load
Current transformer completes the analog functuion of multifrequency nature load, is exactly instruction current generating algorithm wherein including a critical issue.
The instruction current generating algorithm and nonlinear load that generating algorithm can will be instructed to be divided into linear load simulation according to loadtype
The instruction current generating algorithm of simulation.For the former research comparative maturity, and less for the research of the latter, research master at present
If being directed to the instruction current generating algorithm of three-phase uncontrollable rectifier bridge load simulation.But relative to three-phase uncontrollable rectifier bridge, three
The application of phase phase control rectifier bridge is more extensive, and the harmonic characterisitic of input current is more diversified, is more suitable for examination subject
The load of power supply load capacity, however presently relevant research is considerably less, so carrying out the finger of three-phase phase control rectifier bridge load simulation
Enabling the research of electric current generating algorithm is necessary.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide provide it is a kind of design rationally, accuracy it is high three
The instruction current generating algorithm of phase phase control rectifier bridge load simulation.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of instruction current generating algorithm of three-phase phase control rectifier bridge load simulation, comprising the following steps:
Step 1, the boundary condition for determining six conducting sections in a primitive period of three-phase phase control rectifier bridge；
Step 2 determines the decision condition of different circuit working states in six conducting sections and obtains corresponding circuit side
Journey；
Step 3, the circuit equation that six are connected with section carry out discretization solution using backward difference method, obtain three-phase phase
Control the instruction current of rectifier bridge.
Further, the concrete methods of realizing of the step 1 are as follows:
Pulse-triggered angle is divided into three kinds of situations according to circuit working characteristics: 0 °~30 °, 30 °~90 ° and 90 °~
120 °, determine that the boundary condition in six sections of a primitive period is as follows:
(1) when pulse-triggered angle is 0 °~30 °, the boundary condition that section is connected is respectively as follows:
With
(2) when pulse-triggered angle is 30 °~90 °, the boundary condition that section is connected is respectively as follows:
With
(3) when pulse-triggered angle is 90 °~120 °, the boundary condition that section is connected is respectively as follows:
With
Six conductings section, decision condition and circuit equations of the step 2 are as follows:
(1) conducting section decision condition 1. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uab>udc, circuit equation: uab=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(2) conducting section decision condition 2. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uac>udc, circuit equation: uac=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(3) conducting section decision condition 3. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||ubc>udc, circuit equation: ubc=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(4) conducting section decision condition 4. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uba>udc, circuit equation: uba=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(5) conducting section decision condition 5. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uca>udc, circuit equation: uca=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(6) conducting section decision condition 6. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||ucb>udc, circuit equation: ucb=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
The three-phase instruction current that the step 3 obtains is as follows:
(1) the alternating current i of conducting section 1.a、ibAnd icIt is respectively as follows: iL、-iLWith 0；
(2) the alternating current i of conducting section 2.a、ibAnd icIt is respectively as follows: iL, 0 and-iL；
(3) the alternating current i of conducting section 3.a、ibAnd icIt is respectively as follows: 0, iLWith-iL；
(4) the alternating current i of conducting section 4.a、ibAnd icIt is respectively as follows :-iL、iLWith 0；
(5) the alternating current i of conducting section 5.a、ibAnd icIt is respectively as follows :-iL, 0 and iL；
(6) the alternating current i of conducting section 6.a、ibAnd icIt is respectively as follows: 0 ,-iLAnd iL；
The ua、ubAnd ucFor three-phase input voltage；ia、ibAnd icFor three-phase instruction current；uLFor inductive drop, ucFor
Capacitance voltage, iLFor DC side electric current；VT1—VT6For thyristor, corresponding trigger pulse is g1—g6, section is connected 1.: g1→
g2；Section is connected 2.: g2→g3；Section is connected 3.: g3→g4；Section is connected 4.: g4→g5；Section is connected 5.: g5→g6；Conducting
Section is 6.: g6→g1；α1~α6The Trigger Angle in respectively six sections, A phase voltage
The advantages and positive effects of the present invention are:
The present invention provides instruction current generating algorithm for the load of three-phase phase control rectifier bridge, and it is negative to increase existing power electronics
Carry the loadtype that can simulate, improve the ability of power electronics load simulation nonlinear load, and accuracy in computation compared with
Height can satisfy simulation precision requirement, can be widely applied in power electronics load simulation nonlinear load characteristic, can be more preferable
Power supply load capacity is tested on ground.
Detailed description of the invention
Fig. 1 is three-phase phase control rectifier bridge load principle schematic diagram.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing:
A kind of instruction current generating algorithm of three-phase phase control rectifier bridge load simulation is that the three-phase that provides in Fig. 1 is phased whole
It is realized in stream bridge load.U in figurea、ubAnd ucFor three-phase input voltage；ia、ibAnd icFor three-phase input current, i.e. ia、ibAnd ic
For three-phase instruction current；DC side is RLC load, uLFor inductive drop, ucFor capacitance voltage, iLFor DC side electric current；VT1—
VT6For thyristor, corresponding trigger pulse is g1—g6, section 1.: g1→g2；Section is 2.: g2→g3；Section is 3.: g3→g4；Area
Between 4.: g4→g5；Section is 5.: g5→g6；Section is 6.: g6→g1；α1~α6The Trigger Angle in respectively six sections, A phase voltage
The present invention the following steps are included:
Step 1, the boundary condition for determining six conducting sections in a primitive period of three-phase phase control rectifier bridge.
One primitive period of three-phase phase control rectifier bridge can be divided into six sections according to change of current point, pass through detailed analysis electricity
Pulse-triggered angle is divided into three kinds of situations by road working characteristics: 0 °~30 °, 30 °~90 ° and 90 °~120 °, so as to respectively
Determine the boundary condition in six sections of a primitive period, as shown in table 1:
Table 1, in one primitive period of three-phase phase control rectifier bridge six conducting section boundary condition
Step 2 determines the decision condition of different circuit working states in six conducting sections and obtains corresponding circuit side
Journey.
Due to that can have one or two circuit working state in a section, according to DC side electric current and 0 size
Relationship, and the size relation of exchange side line voltage and DC voltage, determine the decision condition of circuit working state, and obtain
Corresponding circuit equation under time domain, as shown in table 2:
The decision condition and circuit equation of circuit working state in 2, six, table conducting sections
Step 3, the circuit equation that six are connected with section carry out discrete solution, obtain the instruction electricity of three-phase phase control rectifier bridge
Stream.
Carrying out discrete solution to circuit equation in this step is to carry out discretization solution using backward difference method, and obtain
The three-phase input current i of three-phase phase control rectifier bridgea、ibAnd ic, as instruction current.
Table 3, three-phase input current and DC side current relationship
The present invention in the specific implementation process, can be realized in numerical control system by writing program:
For three-phase phase control rectifier bridge load simulation object shown in FIG. 1, under the premise shown in table 1, column are write respectively
The corresponding circuit equation of different decision condition, as shown in table 2.Then, for the solution of circuit equation, in program can using to
Calculus of finite differences afterwards, and then DC side electric current i can be obtainedL.Finally according to table 3, so that it may obtain three-phase input current, i.e. three-phase refers to
Enable electric current.
It is emphasized that embodiment of the present invention be it is illustrative, without being restrictive, therefore packet of the present invention
Include and be not limited to embodiment described in specific embodiment, it is all by those skilled in the art according to the technique and scheme of the present invention
The other embodiments obtained, also belong to the scope of protection of the invention.
Claims (1)
1. a kind of instruction current generating algorithm of three-phase phase control rectifier bridge load simulation, it is characterised in that the following steps are included:
Step 1, the boundary condition for determining six conducting sections in a primitive period of three-phase phase control rectifier bridge, specific implementation side
Method are as follows:
According to circuit working characteristics by pulse-triggered angle be divided into three kinds of situations: greater than be equal to 0 ° and less than 30 °, be more than or equal to
30 ° and less than 90 ° and be more than or equal to 90 ° and be less than or equal to 120 °, determine the boundary condition in six sections of a primitive period
It is as follows:
(1) when pulse-triggered angle is more than or equal to 0 ° and less than 30 °, the boundary condition that section is connected is respectively as follows:With
(2) when pulse-triggered angle is more than or equal to 30 ° and less than 90 °, the boundary condition that section is connected is respectively as follows: With
(3) when pulse-triggered angle is more than or equal to 90 ° and is less than or equal to 120 °, the boundary condition that section is connected is respectively as follows: With
Step 2 determines the decision condition of different circuit working states in six conducting sections and obtains corresponding circuit equation such as
Under:
(1) conducting section decision condition 1. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uab>udc, circuit equation: uab=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(2) conducting section decision condition 2. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uac>udc, circuit equation: uac=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(3) conducting section decision condition 3. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||ubc>udc, circuit equation: ubc=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(4) conducting section decision condition 4. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uba>udc, circuit equation: uba=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(5) conducting section decision condition 5. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||uca>udc, circuit equation: uca=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
(6) conducting section decision condition 6. and corresponding circuit equation are respectively as follows:
Decision condition: iL>0||ucb>udc, circuit equation: ucb=L*diL/dt+Uc；
Decision condition: iL=0, circuit equation: C*dUc/dt+Uc/ R=0；
Step 3, the circuit equation that six are connected with section carry out discretization solution using backward difference method, and it is phased whole to obtain three-phase
The instruction current for flowing bridge is as follows:
(1) the alternating current i of conducting section 1.a、ibAnd icIt is respectively as follows: iL、-iLWith 0；
(2) the alternating current i of conducting section 2.a、ibAnd icIt is respectively as follows: iL, 0 and-iL；
(3) the alternating current i of conducting section 3.a、ibAnd icIt is respectively as follows: 0, iLWith-iL；
(4) the alternating current i of conducting section 4.a、ibAnd icIt is respectively as follows :-iL、iLWith 0；
(5) the alternating current i of conducting section 5.a、ibAnd icIt is respectively as follows :-iL, 0 and iL；
(6) the alternating current i of conducting section 6.a、ibAnd icIt is respectively as follows: 0 ,-iLAnd iL；
The ia、ibAnd icFor three-phase instruction current；uLFor inductive drop, ucFor capacitance voltage, iLFor DC side electric current；VT1—
VT6For thyristor, corresponding trigger pulse is g1—g6, section is connected 1.: g1→g2；Section is connected 2.: g2→g3；Section is connected
3.: g3→g4；Section is connected 4.: g4→g5；Section is connected 5.: g5→g6；Section is connected 6.: g6→g1；α1~α6Respectively six
The Trigger Angle in section, A phase voltage
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603849A (en) * | 2004-10-29 | 2005-04-06 | 山东大学 | General simulator for electrical load |
| CN102435869A (en) * | 2011-08-26 | 2012-05-02 | 东北大学 | Experimental device for automatic regulation and compensation of three-phase unbalanced load and control method thereof |
| CN204118687U (en) * | 2014-09-26 | 2015-01-21 | 百固电气有限公司 | A kind of three phase mains random phase, open-phase protection circuit and Active Power Filter-APF |
| CN105391319A (en) * | 2015-10-19 | 2016-03-09 | 株洲变流技术国家工程研究中心有限公司 | High-voltage cascade thyristor rectification circuit photoelectric triggering system and high-voltage cascade thyristor rectification circuit photoelectric triggering method |
-
2016
- 2016-04-12 CN CN201610228723.6A patent/CN105743368B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603849A (en) * | 2004-10-29 | 2005-04-06 | 山东大学 | General simulator for electrical load |
| CN102435869A (en) * | 2011-08-26 | 2012-05-02 | 东北大学 | Experimental device for automatic regulation and compensation of three-phase unbalanced load and control method thereof |
| CN204118687U (en) * | 2014-09-26 | 2015-01-21 | 百固电气有限公司 | A kind of three phase mains random phase, open-phase protection circuit and Active Power Filter-APF |
| CN105391319A (en) * | 2015-10-19 | 2016-03-09 | 株洲变流技术国家工程研究中心有限公司 | High-voltage cascade thyristor rectification circuit photoelectric triggering system and high-voltage cascade thyristor rectification circuit photoelectric triggering method |
Non-Patent Citations (1)
| Title |
|---|
| Research on Power Electronic Load Simulation Algorithm;Pengxian Song,etc.;《2014 9th IEEE conference on Industrial Electronics and Applications》;20140611;全文 |
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