CN108009375A - Control signal characterizing method and PWM modulator model, switching device model and electromagnetical transient emulation method - Google Patents

Control signal characterizing method and PWM modulator model, switching device model and electromagnetical transient emulation method Download PDF

Info

Publication number
CN108009375A
CN108009375A CN201711380227.3A CN201711380227A CN108009375A CN 108009375 A CN108009375 A CN 108009375A CN 201711380227 A CN201711380227 A CN 201711380227A CN 108009375 A CN108009375 A CN 108009375A
Authority
CN
China
Prior art keywords
moment
control signal
pwm
time range
carrier wave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201711380227.3A
Other languages
Chinese (zh)
Other versions
CN108009375B (en
Inventor
董亮
刘海涛
郝思鹏
郝杰
孟高军
陈光宇
王正齐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Institute of Technology
Original Assignee
Nanjing Institute of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Institute of Technology filed Critical Nanjing Institute of Technology
Priority to CN201711380227.3A priority Critical patent/CN108009375B/en
Publication of CN108009375A publication Critical patent/CN108009375A/en
Application granted granted Critical
Publication of CN108009375B publication Critical patent/CN108009375B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses a kind of control signal characterizing method of PWM gate poles control system and the PWM modulator model based on this method, controlled electric electronic switching device model and High-Accuracy PWM current transformer electromagnetical transient emulation method, it can accurately reflect event generation time, and can be obtained on the premise of memory service efficiency is not reduced and export the accurate change moment of PWM modulator output amount of logic, coordinate follow-up various interpolation and integration method to realize the accurate simulation of PWM converter.Control signal characterizing method disclosed by the invention, can express pwm control logic at the same time and logic that may be present accurately changes the moment, at the same optimize memory use and numerical value computational efficiency, improve simulation algorithm program realization reliability.Highly compatible of the present invention, can the convenient application in the simulation software based on above-mentioned electromagnetical transient emulation method in the electromagnetical transient emulation method based on fixed step size such as EMTP.

Description

Control signal characterizing method and PWM modulator model, switching device model and electromagnetism are temporary State emulation mode
Technical field
The present invention relates to a kind of control signal characterizing method of PWM gate poles control system and the PWM modulation based on this method Device model, controlled electric electronic switching device model and High-Accuracy PWM current transformer electromagnetical transient emulation method, belong to electric system Emulation technology.
Background technology
Electric system increasingly shows the trend of power electronics, flexible DC power transmission, flexible AC transmission, distribution The technologies such as generation of electricity by new energy are fast-developing so that application of the power electronic equipment in electric system is further extensive.Power electronics Equipment using the PWM converter of PWM (Pulse Width Modulation, pulse width modulation) technology generally by being formed.PWM Interface of the PWM modulator as current transformer control subsystem and electrical subsystem in current transformer, had both showed consecutive variations spy Property has discrete event feature again, it is difficult to this feature is accurately emulated to it and is imitated to the electro-magnetic transient of modern power industry system Really bring huge challenge.
PWM modulator generally use Natural Sampling or rule sampling mode are simultaneously adjusted using triangular wave or sawtooth waveforms as carrier wave System, exports logical one when the modulating wave of input is more than or equal to carrier wave, on the contrary then export logical zero.Electric system is applied at present Most commonly used electromagnetical transient emulation method is EMTP (the Electro-Magnetic Transient that professor Dommel proposes Program, electromagnetic transients program) method.Since EMTP methods are to carry out simulation calculation, institute based on fixed integration step It can only be changed with the output logic of PWM modulator in conventional EMTP methods at the synchronizing long moment.But due to modulating in practice The change of ripple and carrier wave magnitude relationship is frequently experienced in the non-synchronizing long moment, so routine EMTP methods can cause PWM output letters The information of exact time of number changing is lost, and the result that can produce this change be deferred to next synchronizing long moment Simulation result in reflect, this, which just produces error, can even obtain the result to make mistake.
In view of the above-mentioned problems, numerous studies often only focus on learn the changed exact time of PWM output signal it More accurate simulation result how is obtained using various interpolation and integration method afterwards and numerical value that may be present is shaken at the same time Swing phenomenon to be inhibited, but to lose the changed exact time of PWM output signal this key existing for routine EMTP methods As being but usually ignored.And also all more or less there are precision is poor or memory service efficiency is relatively low for only a small number of solution method The problem of.Just existing two kinds of solutions and its advantage and disadvantage illustrate below.
Scheme one：Do V Q,McCallum D,Giroux P,et al.A backward- forwardinterpolation technique for a precise modeling of power electronics in HYPERSIM[C].Proc.Int.Conf.Power System Transients,Rio de Janeiro,Brazil,2001. A kind of modeling method of PWM modulator is proposed, it is changed accurate that output amount of logic is added in PWM modulator model The computing function at moment simultaneously increases a double type output variable for being used for expressing, at the same matching IGBT, The input variable of a double type is accordingly increased on the model of the controlled electric electronic switching device such as MOSFET, GTO.
Advantage：This method can obtain PWM modulator model and export amount of logic accurately to change the moment, coordinate follow-up Various interpolation and integration method achieve that more accurate emulation.
Shortcoming：It will increase by one on the electronic power switch device model such as PWM modulator and IGBT, MOSFET, GTO Double type variables, add the memory burden of simulation software.
Scheme two：Chinese patent ZL201310119795.3 proposes a kind of improvement for being applicable in PWM converter averaging model EMTP algorithms, change algorithm and eliminate switch process submodule complicated in traditional EMTP methods, while add 2 submodules and use In the phantom error that the parameter and correction parameter inaccuracy of predicted segmentation averaging model are brought.
Advantage：Due to that will be highly improved using the simulation velocity of averaging model, PWM converter.
Shortcoming：(1) averaging model is used, loses variation characteristic of the model in microcosmic time scale, simulation result is not It is enough accurate；(2) some Sofe Switch working characteristics using soft switch technique PWM converter can not be reflected；(3) predict and correct mould Block can increase simulation calculation workload.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of PWM gate poles control system Control signal characterizing method and PWM modulator model, controlled electric electronic switching device model and high accuracy based on this method PWM converter electromagnetical transient emulation method, can accurately reflect event generation time, and can not reduce memory service efficiency On the premise of obtain and export the accurate change moment of PWM modulator output amount of logic, coordinate follow-up various interpolation and integration Method can realize the accurate simulation of PWM converter.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
A kind of control signal characterizing method of PWM gate poles control system, the control signal are numerical variable, its value range It is arranged to EMS memory occupation situation identical with double-precision floating point type data, logical one and logical zero can not only be expressed, Accurate this important information of change moment of amount of logic can also be provided, while calculated with the electromagnetic transient simulation based on fixed step size Method is compatible；The note current emulation moment is tk, the previous fixed step size emulation moment is tk-1, according to tkThe control signal y at momentkTake Value situation, is characterized and extends logical variable for following event：
1. work as ykDuring ∈ (1.0 ,+∞), by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 1；
2. work as yk∈ (0.0,1.0] when, by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 0 → 1 rising edge saltus step, and jumping moment is ts=ytk+(1-y)·tk-1；
3. work as ykWhen=0.0, show control signal t ∈ (tk-1,tk] in time range without event extension logical variable change, Maintain the event extension logical variable of previous step long finish time；
4. work as yk∈ [- 1.0,0.0) when, by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 0 → 1 trailing edge saltus step, and jumping moment is ts=-ytk+(1+y)·tk-1；
5. work as ykDuring ∈ (- ∞, -1.0), by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 0.
A kind of PWM modulator model based on above-mentioned control signal characterizing method, the PWM modulator model include input terminal Son and lead-out terminal；The input terminal is used to input modulation wave signal u；Produced after modulation wave signal u and carrier signal C Pwm control signal y；The lead-out terminal is connected with controlled electric electronic switching device model, for exporting pwm control signal y； The note current emulation moment is tk, tkMoment outputs and inputs respectively ukAnd yk, the previous fixed step size emulation moment is tk-1, tk-1Moment outputs and inputs respectively uk-1And yk-1, carrier cycle T, then tkThe pwm control signal y at momentkIt is updated Cheng Wei：
(a) t is calculatedkTime migration to of the moment in carrier cycleff=tk-floor(tk/ T), wherein floor () table Show downward rounding；Enter step (b)；
(b) according to the type and t of carrier waveoff, calculate tkThe carrier signal C at momentk；Enter step (c)；
(c) according to CkWith ukMagnitude relationship calculate yk：
(c1) if uk＞ CkAnd uk-1≥Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple is both greater than carrier wave, put yk ＞ 1.0, such as yk=2.0；
(c2) if uk＞ CkAnd uk-1＜ Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple and carrier wave magnitude relationship Changed, make yk=(Ck-1-uk-1)/(uk-Ck+Ck-1-uk-1)；
(c3) if uk=CkAnd uk-1＞ Ck-1, show t ∈ (tk-1,tk) time range internal modulation ripple is both greater than carrier wave, tkWhen Carve modulating wave and carrier wave is just equal, make yk=-1.0；
(c4) if uk=CkAnd uk-1=Ck-1, abnormal condition, makes yk=yk-1；
(c5) if uk=CkAnd uk-1＜ Ck-1, show t ∈ (tk-1,tk) time range internal modulation ripple is both less than carrier wave, tkWhen Carve modulating wave and carrier wave is just equal, make yk=1.0；
(c6) if uk＜ CkAnd uk-1＞ Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple and carrier wave magnitude relationship Changed, make yk=-(uk-1-Ck-1)/(Ck-uk+uk-1-Ck-1)；
(c7) if uk＜ CkAnd uk-1≤Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple is both less than carrier wave, put yk ＜ -1.0, such as yk=-2.0.
The carrier wave can be triangular wave, forward direction sawtooth waveforms or backward sawtooth waveforms, and carrier cycle, upper and lower amplitude limit value all may be used Set.
A kind of controlled electric electronic switching device model based on above-mentioned control signal characterizing method, the controlled electric electronics Switching device model is connected with PWM modulator model, receives the pwm control signal y of PWM modulator model output, and according to PWM The logical value and jumping moment of control signal y is into row interpolation or integral and calculating, obtained from switch motion instruction is continued behind, to realize Reinitialize and suppress numerical oscillation；The controlled electric electronic switching device model, by each fixed simulation step length moment Read and handle the pwm control signal from the output of PWM modulator model, when can obtain the accurate change of PWM modulator model Carve, handled to carry out follow-up switch motion using various interpolation and integration method.The note current emulation moment is tk, it is previous solid The fixed step size emulation moment is tk-1, according to tkThe pwm control signal y at momentkJudge opening for controlled electric electronic switching device model Close operating state：
If 1. yk∈ (1.0 ,+∞), shows t ∈ (tk-1,tk] switch motion be not present in time range, and be to open shape State；
If 2. yk∈ (0.0,1.0], show t ∈ (tk-1,tk] it is changed into open-minded from shut-off in time range, and change the moment and be ts=yk·tk+(1-yk)·tk-1；
If 3. yk=0.0, show t ∈ (tk-1,tk] switch motion is not present in time range；
If 4. yk∈ [- 1.0,0.0), show t ∈ (tk-1,tk] be changed into turning off from opening in time range, and change the moment For ts=-yk·tk+(1+yk)·tk-1；
If 5. yk∈ (- ∞, -1.0), shows t ∈ (tk-1,tk] switch motion be not present in time range, and to turn off shape State.
The controlled electric electronic switching device can be SCR, IGBT, MOSFET, GTO or perfect switch.
A kind of High-Accuracy PWM current transformer electromagnetical transient emulation method based on above-mentioned control signal characterizing method, including such as Lower step：
(1) simulation initialisation, including the sequence of control submodel, electric equation matrix and quantity of state initialization, and initially Simulation time is set；
(2) a step simulation calculation is carried out to all control subsystem models, obtains modulation wave signal；
(3) a step simulation calculation is carried out to all PWM modulator models, obtains logical value and the saltus step of pwm control signal Time；
(4) according to the logical value and jumping moment of pwm control signal, into row interpolation or integral and calculating, controlled electric is obtained The follow-up switch motion instruction of electronic switching device model, is reinitialized with realization and suppresses numerical oscillation, final to obtain more Accurate PWM converter simulation result；
(5) terminate the simulation calculation of current step, the emulation moment is pushed away further and judges whether emulation terminates：If so, Then terminate；Otherwise, return to step (2).
Beneficial effect：The control signal characterizing method of PWM gate poles control system provided by the invention and based on this method PWM modulator model, controlled electric electronic switching device model and High-Accuracy PWM current transformer electromagnetical transient emulation method, with showing There is technology to compare, there is following advantage：1st, the control signal characterizing method that the present invention uses, can express pwm control logic again Its accurate change moment can be expressed, realizes that more accurate PWM converter emulation is built for the various interpolation of later use and integration method Necessary effective premise is found；2nd, the present invention optimizes memory use on the basis of PWM converter high accuracy modeling and simulating is realized With numerical value computational efficiency, the value of event extension logical type variable is multiplied by by negative sign realizes logical not operation, improves imitative The reliability that true algorithm routine is realized；3rd, model adaptation of the present invention to existing PWM modulator, controlled electric electronic switching device Very little, highly compatible, can be based on above-mentioned electromagnetic transient simulations in the electromagnetical transient emulation method based on fixed step size such as EMTP Convenient application in the simulation software of method.
Brief description of the drawings
Fig. 1 is the implementing procedure figure of High-Accuracy PWM current transformer electromagnetical transient emulation method；
Fig. 2 is variable distribution and its expression implication schematic diagram of the pwm control signal of the present invention；
Fig. 3 is the schematic diagram of the PWM modulation model of the present invention；
Fig. 4 is the controlled electric electronic switching device model schematic of the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
A kind of control signal characterizing method of PWM gate poles control system, the control signal are numerical variable, its value range It is arranged to EMS memory occupation situation identical with double-precision floating point type data, remembers that the current emulation moment is tk, previous fixed step The long emulation moment is tk-1, according to tkThe control signal y at momentkValue condition, be characterized for following event extend logic become Amount：
1. work as ykDuring ∈ (1.0 ,+∞), by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 1；
2. work as yk∈ (0.0,1.0] when, by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 0 → 1 rising edge saltus step, and jumping moment is ts=ytk+(1-y)·tk-1；
3. work as ykWhen=0.0, show control signal t ∈ (tk-1,tk] in time range without event extension logical variable change, Maintain the event extension logical variable of previous step long finish time；
4. work as yk∈ [- 1.0,0.0) when, by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 0 → 1 trailing edge saltus step, and jumping moment is ts=-ytk+(1+y)·tk-1；
5. work as ykDuring ∈ (- ∞, -1.0), by control signal in t ∈ (tk-1,tk] the event extension logic in time range becomes Amount is characterized as 0.
Using above-mentioned control signal characterizing method, the logic and effective table at the same time of PWM gate pole control systems can be expressed Up to the changed exact time of logic.Carrying out common logical not operation to event extension logical variable can be by simply multiplying Realized with negative sign, improve computational efficiency while do not increase memory consumption additionally.Coordinate follow-up various interpolation and integration method The accurate simulation of PWM converter can be achieved.
Fig. 1 is a kind of High-Accuracy PWM current transformer electromagnetical transient emulation method flow chart, is conventional electric power system outside dotted line frame Electromagnetic transient simulation flow, it is core of the present invention that dotted line frame is interior.Electro-magnetic transient is carried out to the electric system containing PWM converter to imitate Allah will have below scheme：After initialization, the simulation calculation for carrying out a step control subsystem is believed so as to obtain modulating wave Number, the emulation of a step PWM modulator is then carried out, then judges to whether there is control logic saltus step in current step and carries out phase The processing answered, finally pushes forward the emulation moment until emulation terminates.If currently the emulation moment is tk, previous fixed step The long emulation moment is tk-1, it is as follows to specifically include step：
Step 1: simulation initialisation, including the sequence of control submodel, electric equation matrix and quantity of state initialization, and Initial simulation time is set.
Step 2: carrying out a step simulation calculation to all control subsystem models, modulation wave signal u is obtained.
Step 3: to all PWM modulator models carry out a step simulation calculation, obtain pwm control signal logical value and Bound-time；Here pwm control signal is characterized using the above method, event extension logical variable distribution and its institute's table The logic situation of change reached is specifically as shown in Figure 2.
The PWM modulator model is as shown in figure 3, including input terminal and lead-out terminal；The input terminal is used for defeated Enter modulation wave signal u；Modulation wave signal u and carrier signal C produce pwm control signal y more afterwards；The lead-out terminal with it is controlled Electronic power switch device model is connected, for exporting pwm control signal y；The note current emulation moment is tk, tkThe input at moment It is respectively u with outputkAnd yk, the previous fixed step size emulation moment is tk-1, tk-1Moment outputs and inputs respectively uk-1With yk-1, carrier cycle T, then tkThe pwm control signal y at momentkRenewal process be：
(a) t is calculatedkTime migration to of the moment in carrier cycleff=tk-floor(tk/ T), wherein floor () table Show downward rounding；Enter step (b)；
(b) according to the type and t of carrier waveoff, calculate tkThe carrier signal C at momentk；Enter step (c)；
(c) according to CkWith ukMagnitude relationship calculate yk：
(c1) if uk＞ CkAnd uk-1≥Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple is both greater than carrier wave, put yk ＞ 1.0；
(c2) if uk＞ CkAnd uk-1＜ Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple and carrier wave magnitude relationship Changed, make yk=(Ck-1-uk-1)/(uk-Ck+Ck-1-uk-1)；
(c3) if uk=CkAnd uk-1＞ Ck-1, show t ∈ (tk-1,tk) time range internal modulation ripple is both greater than carrier wave, tkWhen Carve modulating wave and carrier wave is just equal, make yk=-1.0；
(c4) if uk=CkAnd uk-1=Ck-1, abnormal condition, makes yk=yk-1；
(c5) if uk=CkAnd uk-1＜ Ck-1, show t ∈ (tk-1,tk) time range internal modulation ripple is both less than carrier wave, tkWhen Carve modulating wave and carrier wave is just equal, make yk=1.0；
(c6) if uk＜ CkAnd uk-1＞ Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple and carrier wave magnitude relationship Changed, make yk=-(uk-1-Ck-1)/(Ck-uk+uk-1-Ck-1)；
(c7) if uk＜ CkAnd uk-1≤Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple is both less than carrier wave, put yk ＜ -1.0, such as yk=-2.0.
Step 4: according to the logical value and jumping moment of pwm control signal, into row interpolation or integral and calculating, obtain controlled The follow-up switch motion instruction of electronic power switch device model, is reinitialized with realization and suppresses numerical oscillation, final to obtain More accurate PWM converter simulation result.
The controlled electric electronic switching device model is as shown in figure 4, the controlled electric electronic switching device model and PWM Modulator model is connected, and receives the pwm control signal y of PWM modulator model output, and according to the logical value of pwm control signal y With jumping moment into row interpolation or integral and calculating, obtained from continuing switch motion instruction behind, reinitialize to realize and suppress number Value vibration；The note current emulation moment is tk, the previous fixed step size emulation moment is tk-1, according to tkThe pwm control signal y at momentk Judge the switch motion state of controlled electric electronic switching device model：
If 1. yk∈ (1.0 ,+∞), shows t ∈ (tk-1,tk] switch motion be not present in time range, and be to open shape State；
If 2. yk∈ (0.0,1.0], show t ∈ (tk-1,tk] it is changed into open-minded from shut-off in time range, and change the moment and be ts=yk·tk+(1-yk)·tk-1；
If 3. yk=0.0, show t ∈ (tk-1,tk] switch motion is not present in time range；
If 4. yk∈ [- 1.0,0.0), show t ∈ (tk-1,tk] be changed into turning off from opening in time range, and change the moment For ts=-yk·tk+(1+yk)·tk-1；
If 5. yk∈ (- ∞, -1.0), shows t ∈ (tk-1,tk] switch motion be not present in time range, and to turn off shape State.
Step 5: terminating the simulation calculation of current step, the emulation moment is pushed away further and judges whether emulation terminates：If It is then to terminate；Otherwise, return to step two.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (6)

  1. A kind of 1. control signal characterizing method of PWM gate poles control system, it is characterised in that：The control signal is numerical variable, Its value range and EMS memory occupation situation are arranged to identical with double-precision floating point type data, remember that the current emulation moment is tk, The previous fixed step size emulation moment is tk-1, according to tkThe control signal y at momentkValue condition, be characterized as following event Extend logical variable：
    1. work as ykDuring ∈ (1.0 ,+∞), by control signal in t ∈ (tk-1,tk] event extension logical variable table in time range Levy as 1；
    2. work as yk∈ (0.0,1.0] when, by control signal in t ∈ (tk-1,tk] event extension logical variable table in time range The rising edge saltus step for 0 → 1 is levied, and jumping moment is ts=ytk+(1-y)·tk-1；
    3. work as ykWhen=0.0, show control signal t ∈ (tk-1,tk] in time range without event extension logical variable change, maintain The event extension logical variable of previous step long finish time；
    4. work as yk∈ [- 1.0,0.0) when, by control signal in t ∈ (tk-1,tk] event extension logical variable table in time range The trailing edge saltus step for 0 → 1 is levied, and jumping moment is ts=-ytk+(1+y)·tk-1；
    5. work as ykDuring ∈ (- ∞, -1.0), by control signal in t ∈ (tk-1,tk] event extension logical variable table in time range Levy as 0.
  2. A kind of 2. PWM modulator model based on the 1 control signal characterizing method of power, it is characterised in that：The PWM modulator mould Type includes input terminal and lead-out terminal；The input terminal is used to input modulation wave signal u；Modulation wave signal u and carrier wave letter Number C produces pwm control signal y more afterwards；The lead-out terminal is connected with controlled electric electronic switching device model, for exporting Pwm control signal y；The note current emulation moment is tk, tkMoment outputs and inputs respectively ukAnd yk, previous fixed step size imitates The true moment is tk-1, tk-1Moment outputs and inputs respectively uk-1And yk-1, carrier cycle T, then tkThe PWM control letters at moment Number ykRenewal process be：
    (a) t is calculatedkTime migration t of the moment in carrier cycleoff=tk-floor(tk/ T), wherein floor () represent to Lower rounding；Enter step (b)；
    (b) according to the type and t of carrier waveoff, calculate tkThe carrier signal C at momentk；Enter step (c)；
    (c) according to CkWith ukMagnitude relationship calculate yk：
    (c1) if uk＞ CkAnd uk-1≥Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple is both greater than carrier wave, put yk＞ 1.0；
    (c2) if uk＞ CkAnd uk-1＜ Ck-1, show t ∈ (tk-1,tk] magnitude relationship of time range internal modulation ripple and carrier wave occurs Change, makes yk=(Ck-1-uk-1)/(uk-Ck+Ck-1-uk-1)；
    (c3) if uk=CkAnd uk-1＞ Ck-1, show t ∈ (tk-1,tk) time range internal modulation ripple is both greater than carrier wave, tkMoment modulates Ripple and carrier wave are just equal, make yk=-1.0；
    (c4) if uk=CkAnd uk-1=Ck-1, abnormal condition, makes yk=yk-1；
    (c5) if uk=CkAnd uk-1＜ Ck-1, show t ∈ (tk-1,tk) time range internal modulation ripple is both less than carrier wave, tkMoment modulates Ripple and carrier wave are just equal, make yk=1.0；
    (c6) if uk＜ CkAnd uk-1＞ Ck-1, show t ∈ (tk-1,tk] magnitude relationship of time range internal modulation ripple and carrier wave occurs Change, makes yk=-(uk-1-Ck-1)/(Ck-uk+uk-1-Ck-1)；
    (c7) if uk＜ CkAnd uk-1≤Ck-1, show t ∈ (tk-1,tk] time range internal modulation ripple is both less than carrier wave, put yk＜- 1.0。
  3. 3. PWM modulator model according to claim 2, it is characterised in that：The carrier wave is triangular wave, forward direction sawtooth waveforms Or backward sawtooth waveforms.
  4. A kind of 4. controlled electric electronic switching device model based on the 1 control signal characterizing method of power, it is characterised in that：Should Controlled electric electronic switching device model is connected with PWM modulator model, receives the PWM control letters of PWM modulator model output Number y, and according to the logical value and jumping moment of pwm control signal y into row interpolation or integral and calculating, it is dynamic obtained from switch is continued behind Instruct, reinitialize to realize and suppress numerical oscillation；The note current emulation moment is tk, the previous fixed step size emulation moment is tk-1, according to tkThe pwm control signal y at momentkJudge the switch motion state of controlled electric electronic switching device model：
    If 1. yk∈ (1.0 ,+∞), shows t ∈ (tk-1,tk] switch motion is not present in time range, and be opening state；
    If 2. yk∈ (0.0,1.0], show t ∈ (tk-1,tk] it is changed into open-minded from shut-off in time range, and it is t to change the moments= yk·tk+(1-yk)·tk-1；
    If 3. yk=0.0, show t ∈ (tk-1,tk] switch motion is not present in time range；
    If 4. yk∈ [- 1.0,0.0), show t ∈ (tk-1,tk] be changed into turning off from opening in time range, and it is t to change the moments =-yk·tk+(1+yk)·tk-1；
    If 5. yk∈ (- ∞, -1.0), shows t ∈ (tk-1,tk] switch motion is not present in time range, and be off state.
  5. 5. controlled electric electronic switching device model according to claim 4, it is characterised in that：The controlled electric electronics Switching device is SCR, IGBT, MOSFET, GTO or perfect switch.
  6. 6. a kind of High-Accuracy PWM current transformer electromagnetical transient emulation method based on the 1 control signal characterizing method of power, its feature It is：Include the following steps：
    (1) simulation initialisation, including the sequence of control submodel, electric equation matrix and quantity of state initialization, and initial emulation Time is set；
    (2) a step simulation calculation is carried out to all control subsystem models, obtains modulation wave signal；
    (3) a step simulation calculation is carried out to all PWM modulator models, obtains the logical value and bound-time of pwm control signal；
    (4) according to the logical value and jumping moment of pwm control signal, into row interpolation or integral and calculating, controlled electric electronics is obtained The follow-up switch motion instruction of switching device model, is reinitialized with realization and suppresses numerical oscillation, final acquisition is more accurate PWM converter simulation result；
    (5) terminate the simulation calculation of current step, the emulation moment is pushed away further and judges whether emulation terminates：If so, then tie Beam；Otherwise, return to step (2).
CN201711380227.3A 2017-12-20 2017-12-20 Control signal characterization method, PWM (pulse-width modulation) modulator model, switching device model and electromagnetic transient simulation method Active CN108009375B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711380227.3A CN108009375B (en) 2017-12-20 2017-12-20 Control signal characterization method, PWM (pulse-width modulation) modulator model, switching device model and electromagnetic transient simulation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711380227.3A CN108009375B (en) 2017-12-20 2017-12-20 Control signal characterization method, PWM (pulse-width modulation) modulator model, switching device model and electromagnetic transient simulation method

Publications (2)

Publication Number Publication Date
CN108009375A true CN108009375A (en) 2018-05-08
CN108009375B CN108009375B (en) 2020-12-29

Family

ID=62059974

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711380227.3A Active CN108009375B (en) 2017-12-20 2017-12-20 Control signal characterization method, PWM (pulse-width modulation) modulator model, switching device model and electromagnetic transient simulation method

Country Status (1)

Country Link
CN (1) CN108009375B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485487A (en) * 1994-02-25 1996-01-16 Motorola, Inc. Reconfigurable counter and pulse width modulator (PWM) using same
US20070268728A1 (en) * 2006-05-22 2007-11-22 Regents Of The University Of Minnesota Carrier-based pulse-width modulation (pwm) control for matrix converters
CN102035421A (en) * 2009-09-28 2011-04-27 Tdk兰达有限公司 Control device and control method and program
CN103226655A (en) * 2013-04-08 2013-07-31 清华大学 Improved EMPT algorithm applicable to average model of PWM current transformer
CN104124858A (en) * 2014-05-29 2014-10-29 浙江大学 Sine pulse width modulation PWM (pulse-width modulator) logic competition inhibiting method
CN106202706A (en) * 2016-07-08 2016-12-07 电子科技大学 A kind of discrete modeling of switch converters and stability analysis and Parameters design
CN106329550A (en) * 2016-09-20 2017-01-11 国网重庆市电力公司电力科学研究院 PSS model applicable to PSCAD electromagnetic transient simulation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485487A (en) * 1994-02-25 1996-01-16 Motorola, Inc. Reconfigurable counter and pulse width modulator (PWM) using same
US20070268728A1 (en) * 2006-05-22 2007-11-22 Regents Of The University Of Minnesota Carrier-based pulse-width modulation (pwm) control for matrix converters
CN102035421A (en) * 2009-09-28 2011-04-27 Tdk兰达有限公司 Control device and control method and program
CN103226655A (en) * 2013-04-08 2013-07-31 清华大学 Improved EMPT algorithm applicable to average model of PWM current transformer
CN104124858A (en) * 2014-05-29 2014-10-29 浙江大学 Sine pulse width modulation PWM (pulse-width modulator) logic competition inhibiting method
CN106202706A (en) * 2016-07-08 2016-12-07 电子科技大学 A kind of discrete modeling of switch converters and stability analysis and Parameters design
CN106329550A (en) * 2016-09-20 2017-01-11 国网重庆市电力公司电力科学研究院 PSS model applicable to PSCAD electromagnetic transient simulation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
宋炎侃 等: "大规模电力系统电磁暂态并行仿真算法和实现", 《电力建设》 *

Also Published As

Publication number Publication date
CN108009375B (en) 2020-12-29

Similar Documents

Publication Publication Date Title
Gdaim et al. Design and experimental implementation of DTC of an induction machine based on fuzzy logic control on FPGA
CN104462661B (en) Electronic power switch interpolation real-time emulation method
CN104866665A (en) Hybrid simulation method including power electronic equipment based on interface equivalence and interaction
CN103020385B (en) Based on RTDS electrical network 500kV major network modeling and simulating system
CN103746583B (en) The bridge arm equivalent emulation mode of a kind of MMC
CN104915506B (en) A kind of modeling method for current transformer power consumption calculation
CN107168103B (en) Hydroelectric generating set speed regulation control simulation method and system
Strunz Flexible numerical integration for efficient representation of switching in real time electromagnetic transients simulation
CN103593520A (en) Equivalent simulation calculation modeling method of modular multilevel converter
CN104809308B (en) A kind of transverter switch function modeling method suitable for asymmetric operating state
CN106549400A (en) A kind of control method of the distribution static synchronous compensator based on voltage prediction
CN109783895A (en) A kind of electric system hybrid simulation method and system containing distributed generation resource
CN109543339A (en) Three-level converter determines admittance modeling and real-time emulation method
CN106682323B (en) A kind of converting system and its method that framework model is converted to Dynamic Simulation Model
CN103956951B (en) Low carrier ratio is at the line computation soft core of multi-mode space vector pulse width modulation
CN108631632A (en) A kind of MMC instant power loss Precise computations based on virtual bridge arm mathematical model
CN106407492A (en) Micro-grid real-time simulation method for processing multi-break switches of power systems
CN106875293B (en) A kind of wind power plant booster stations main transformer failure generated energy loss acquisition methods
CN106570226B (en) Mean value model and emulation mode in modularization multi-level converter
CN107046388B (en) A kind of switched reluctance machines curren tracing control method, controller and speed-regulating system
CN106329550A (en) PSS model applicable to PSCAD electromagnetic transient simulation
CN109428340A (en) A kind of emulation mode and system of flexible DC transmission device
CN108628182A (en) A kind of small step-length emulation mode of electro-magnetic transient and system
CN105449705B (en) The emulation mode and system of tap transformer real time load pressure regulation in electric system
CN108009375A (en) Control signal characterizing method and PWM modulator model, switching device model and electromagnetical transient emulation method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant