CN103516274B - A kind of generator excited system including polymorphic type limiting unit - Google Patents
A kind of generator excited system including polymorphic type limiting unit Download PDFInfo
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Abstract
The invention discloses a kind of generator excited system including polymorphic type limiting unit, including low encouraging limiting unit, mistake encourages limiting unit, PID regulates unit, power amplification unit, also includes stator overload limit unit (limit including stator over-current, maximum idle restriction two kinds).Described low encourage limiting unit output and be connectable to input or the voltage superposition point of Gao Bimen after the input of Gao Bimen before PID regulation unit or PID regulation unit, described mistake is encouraged limiting unit output and is connected to before PID regulation unit the low input than door after the low ratio input of door or PID regulation unit, and the output of described stator overload limit unit is low before being connected to PID regulation unit regulates the low input than door or voltage superposition point after unit than the input of door or PID.The mistake that the present invention sets up is encouraged restriction, low is encouraged restriction, stator overload limit unit three class model, can meet the requirement of plurality of access modes, through emulation testing, institute's established model having stable behavior is reliable, definite value is accurate, is consistent with device actual measurement characteristic, meets engineer applied requirement.In addition this model also is available for the technical staff carrying out excitation system simulation study with reference to using.
Description
Technical field
The present invention relates to generator excited system, particularly relate to a kind of generator excitation including polymorphic type limiting unit
System.
Background technology
In current China Power System Analysis, commonly used is that PASAP or BPA comprehensive stability analyzes system, in program
Excitation system model is provided with two kinds of limited models: crosses and encourages restriction, low encourage restriction.
But combine the limited model provided in steady program and in structure and functionally exist from actual excitation unit many different,
Mainly have:
1, model structure does not corresponds: most of regulator limiters are that before PID governing loop, (minority exists access point
After PID governing loop), access way has by the door access of competing ratio, also has and is directly connected to voltage superposition point；And only combine steady program
Provide and be connected on PID governing loop latter approach by competing than door.
2, modular concept is inconsistent with reality, makes the acting characteristic of simulation calculation not conform to the actual conditions, and some parameter physics is anticipated
Justice is indefinite, uses inconvenience.
3, generator unit stator overload limit model is lacked.
For these reasons, the actual effect the most not considering limiting unit when carrying out system-computed, this makes
Large disturbances, growth process systematic analysis research because not counting and the impact of the non-linear factor such as limiting unit, make result of calculation exist
Deviation.
Summary of the invention
It is an object of the invention to provide a kind of generator excited system including polymorphic type limiting unit, it is possible to action is steady
Fixed reliable, definite value is accurate, is consistent with device actual measurement characteristic, meets engineer applied requirement.
The present invention uses following technical proposals: a kind of generator excited system including polymorphic type limiting unit, including
Low encourage limiting unit, mistake encourages limiting unit, PID regulates unit, power amplification unit, also includes stator overload limit list
Unit, the input of described stator overload limit unit has generator reactive and Generator end electric current, and described stator is the most negative
The output of lotus limiting unit is connected to the first low ratio door before PID regulation unit, and first low connects the second low ratio than the outfan of door
Door input, generator terminal voltage and generator reactive input, to adjusting difference unit, adjust difference unit output to first adder, electricity
Pressure set-point also inputs to first adder, the Gao Bimen before the outfan input of first adder to PID regulation unit, high ratio
The output of door is to the second low ratio door, and second low is connected to voltage superposition point adder than the outfan of door, and the output of PSS unit is to electricity
Laminated is added some points adder, and the output of voltage superposition point adder to PID regulates unit, and PID regulation unit output is single through PID regulation
Low ratio door, Gao Bimen to power amplification unit after unit, power amplification unit output generator rotor voltage.
Described stator overload limit unit is stator over-current limiting unit, and stator over-current limiting unit includes calculating
Heat accumulation unit, superheat value reach definite value judging unit, allow again to cross stream judging unit, and Generator end electric current inputs to electric current
Measurement links, the output of current measurement link with up to correction link with calculate heat accumulation unit, the output of correction link and fixed
Electron current limits set-point output and selects unit to the 4th adder, the output of the 4th adder to stator current or Reactive-power control
The 6th multiplier, generator reactive input is to reactive power measurement link, and reactive power measurement link exports to fifth adder, idle gives
Definite value output selects the 7th multiplication of unit to fifth adder, the output of fifth adder to stator current or Reactive-power control
Device, stator current or Reactive-power control select the output of unit to proportional component, and proportional component output is to open or locking stator electricity
Ductility limit output unit；Output to the superheat value calculating heat accumulation unit reaches definite value judging unit and again crosses stream judging unit,
Superheat value reaches the output of definite value judging unit to again crossing stream judging unit and stator current or Reactive-power control selection unit, opening
Or locking stator current limits output unit, open or locking stator current limits output unit and exports to PID regulation unit
First low compares door.
The invention also discloses another kind and include the generator excited system of polymorphic type limiting unit, encourage restriction including low
Unit, mistake encourages limiting unit, PID regulates unit, power amplification unit, also includes stator overload limit unit, described
The input of stator overload limit unit has generated power, generator reactive, described stator overload limit unit defeated
Go out to be connected to voltage superposition point adder, generator terminal voltage and generator reactive input and extremely adjust difference unit, adjust difference unit defeated
Going out to first adder, voltage set-point also inputs to first adder, and the outfan input of first adder is single to PID regulation
The output of the Gao Bimen before unit, Gao Bimen is to the second low ratio door, and first is low described second lower than door than the outfan of door connects
Input, described second low is connected to voltage superposition point adder than the outfan of door, and PSS exports to voltage superposition point addition
Device, the output of voltage superposition point adder to PID regulates unit, the PID regulation unit output low ratio after PID regulation unit
Door, Gao Bimen to power amplification unit, power amplification unit output generator rotor voltage.
Described stator overload limit unit uses maximum idle limiting unit, and maximum idle limiting unit includes
Big idle restriction definite value table, generated power input to active power measurement link, the output of active power measurement link is to maximum idle restriction
Definite value table, maximum idle restriction definite value table exports to filtering link, and filtering link exports to the 6th adder and the 7th adder,
Generator reactive input adds to reactive power measurement link, reactive power measurement link output to correction link, correction link output to the 6th
Musical instruments used in a Buddhist or Taoist mass and the 7th adder, whether the output of the 6th adder to limiter reaches definite value judging unit, and whether limiter reaches
The output of definite value judging unit is by limiter action delay timing unit to returning unit, and the output returning unit is taken advantage of to second
Musical instruments used in a Buddhist or Taoist mass, the output of the 7th adder is added by correction link to the second multiplier, the output of the second multiplier to voltage superposition point
Musical instruments used in a Buddhist or Taoist mass.
The invention also discloses another generator excited system including polymorphic type limiting unit, encourage restriction including low
Unit, mistake encourages limiting unit, PID regulates unit, power amplification unit, also includes stator overload limit unit, described
The input of stator overload limit unit has generator reactive and Generator end electric current, described stator over-current limiting unit
Output is connected to the low input than door after PID regulation unit, and the first low outfan than door before PID regulation unit connects
The second low input than door, generator terminal voltage and generator reactive input, to adjusting difference unit, adjust difference unit output to the
One adder, voltage set-point also inputs to first adder, before the outfan input of first adder to PID regulation unit
The output of Gao Bimen, Gao Bimen is to the second low ratio door, and second low is connected to voltage superposition point adder than the outfan of door, PSS
Output is to voltage superposition point adder, and the output of voltage superposition point adder to PID regulates unit, PID regulation unit output warp
Low ratio door, Gao Bimen to power amplification unit after PID regulation unit, power amplification unit output generator rotor voltage.
Described stator overload limit unit uses stator over-current limiting unit, and stator over-current limiting unit includes meter
Calculate heat accumulation unit, superheat value reaches definite value judging unit, allow again to cross stream judging unit, and the input of Generator end electric current is to electricity
Flow measurement link, the output of current measurement link with up to correction link and calculate heat accumulation unit, the output of correction link and
Stator current limits set-point output to the 4th adder, the output of the 4th adder to stator current or Reactive-power control and selects single
6th multiplier of unit, generator reactive input to reactive power measurement link, reactive power measurement link exports to fifth adder, idle
Set-point output selects the 7th multiplication of unit to fifth adder, the output of fifth adder to stator current or Reactive-power control
Device, stator current or Reactive-power control select the output of unit to proportional component, and proportional component output is the most open by governing loop
Or locking stator current limits output unit；Output to the superheat value calculating heat accumulation unit reaches definite value judging unit and mistake again
Stream judging unit, superheat value reaches the output of definite value judging unit to again crossing stream judging unit and stator current or Reactive-power control choosing
Selecting unit, opening or locking stator current and limit output unit, open or locking stator current limits output unit and exports to PID
Low door is compared after regulation unit.
Wherein said low limiting unit of encouraging can be implemented as: includes the low compensating unit of set end voltage, low encourage restriction definite value
The low restriction output unit of encouraging of table, opening or locking, generator terminal voltage inputs to voltage measurement link, voltage measurement link
Exporting to the low compensating unit of set end voltage, set end voltage low compensating unit output to the 3rd multiplier, generated power exports extremely
Active power measurement link, active power measurement link output to low restriction definite value table of encouraging, low restriction definite value table of encouraging exports to the 3rd multiplier,
The output of the 3rd multiplier is exported to the 8th adder by filtering link；Generator reactive exports to reactive power measurement link, nothing
The output of merit measurement links to correction link, the output of correction link to the 8th adder, the output of the 8th adder to open or
Low restriction output unit and the 4th multiplier of encouraging of locking, low the encouraging of open or locking limits the output of output unit to the 4th multiplier
With the 9th adder, the output of the 4th multiplier to proportional component, the output of proportional component to the 9th adder, the 9th adder
Output to PID regulation unit before Gao Bimen.
Wherein said low limiting unit of encouraging is also implemented as: include that the low compensating unit of set end voltage, low encouraging limit calmly
The low restriction output unit of encouraging of value table, opening or locking, generator terminal voltage inputs to voltage measurement link, voltage measurement link
Output to the low compensating unit of set end voltage, set end voltage low compensating unit output to the 3rd multiplier, generated power exports
To active power measurement link, active power measurement link output to low restriction definite value table of encouraging, low restriction definite value table of encouraging exports to the 3rd multiplication
Device, the output of the 3rd multiplier is exported to the 8th adder by filtering link；Generator reactive exports to reactive power measurement link,
The output of reactive power measurement link is to correction link, the output of correction link to the 8th adder, and the output of the 8th adder is to open
Or low restriction output unit and the 4th multiplier of encouraging of locking, low the encouraging of open or locking limits the output of output unit to the 4th multiplication
Device and the 9th adder, the output of the 4th multiplier to proportional component, the output of proportional component is added to the 9th by governing loop
Musical instruments used in a Buddhist or Taoist mass, Gao Bimen after the output of the 9th adder to PID regulation unit.
Wherein said low limiting unit of encouraging is also implemented as: include that the low compensating unit of set end voltage, low encouraging limit calmly
Value table, generator terminal voltage input to voltage measurement link, the low compensating unit of the output of voltage measurement link to set end voltage,
The output of set end voltage low compensating unit exports to active power measurement link, active power measurement link to the 5th multiplier, generated power
Output exports to the 5th multiplier to low restriction definite value table of encouraging, low restriction definite value table of encouraging, and the output of the 5th multiplier is by filtering
Link exports to the tenth adder；Generator reactive output exports to correction link to reactive power measurement link, reactive power measurement link,
The output of correction link is added to voltage signal summing point to the tenth adder, the output of the tenth adder by correction link output
Musical instruments used in a Buddhist or Taoist mass.
Wherein said mistake is encouraged limiting unit and be can be implemented as: includes given value of current value and selects unit, calculates heat accumulation
Unit, transient current reach top value judging unit, superheat value reaches definite value judging unit, top value or cross encourage action judging unit, permission
Again crossing and encourage judging unit, opening or locking and cross and encourage output unit, rotor current is input to measurement links, the output of measurement links
It is input simultaneously to correction link, transient current reaches top value judging unit and calculates heat accumulation unit, described correction link defeated
Going out to second adder, given value of current value selects unit also to export to second adder, and the output of second adder is taken advantage of to first
Musical instruments used in a Buddhist or Taoist mass, the described output calculating heat accumulation unit with up to superheat value reach definite value judging unit and again mistake encourage judging unit,
Superheat value reaches the output of definite value judging unit and crosses that encourage in output unit or door with up to open or locking, again cross that to encourage judgement single
NAND gate in unit, described transient current reaches the output of definite value judging unit with up to top value or excessively encouraging action judging unit
Encourage in output unit or door is crossed in not gate, opening or locking, and open or locking is crossed and encouraged in output unit or the output of door is to first
Multiplier, the output of the first multiplier to proportional unit, the output of proportional unit to the 3rd adder, the output of the 3rd adder
First is held to PID regulation unit low to compare door.
Wherein said mistake is encouraged limiting unit and is also implemented as: includes given value of current value and selects unit, calculates hot amassing
Tired unit, transient current reaches top value judging unit, superheat value reaches definite value judging unit, top value or cross and encourage action judging unit, permit
Being permitted the most again to cross and encourage judging unit, opening or locking and cross and encourage output unit, rotor current is input to measurement links, measurement links defeated
Go out to be input simultaneously to correction link, transient current reaches top value judging unit and calculate heat accumulation unit, described correction link
Exporting to second adder, given value of current value selects unit also to export to second adder, the output of second adder to first
Multiplier, the described output calculating heat accumulation unit is with reaching definite value judging unit up to superheat value and again excessively encouraging judgement list
Unit, superheat value reach the output of definite value judging unit with up to open or locking cross encourage in output unit or door and again mistake encourage and sentence
NAND gate in disconnected unit, described transient current reaches the output of definite value judging unit with up to top value or cross and encourage action and judge single
The not gate of unit and opening or locking cross encourage in output unit or door, or the output of door is to the first multiplier, the first multiplier
Exporting to proportional unit, the output of proportional unit is by regulating unit to the 3rd adder, the outfan of the 3rd adder to PID
Low door is compared after regulation unit.
The present invention, on the basis of studying multiple excitation system limiting unit operation principle and actual measurement characteristic, established and encouraged
Limit, low encourage restrictions, stator overload limit (including stator over-current restriction, maximum idle restriction two kinds) three class models,
And sets forth unit output and and be connected to voltage superposition before high (low) is connected to PID governing loop than door, after PID governing loop
Model structure under the various ways such as point and parameter, can select according to actual device.Through emulation testing, institute's established model action
Reliable and stable, definite value is accurate, is consistent with device actual measurement characteristic, meets engineer applied requirement；Limit is considered in Power System Analysis
After the impact of model of element processed, make analysis result more meet reality, can avoid or reduce owing to the deviation of result of calculation is brought
Power system stability problem, runs significant for the planning of accurate instruction power system development and safety in production.In addition originally
Model also is available for the technical staff carrying out excitation system simulation study with reference to using.
Accompanying drawing explanation
Fig. 1 is (from shunt excitation) the generator excited system illustraton of model of the limiting unit comprising the present invention；
Fig. 2 was the structural representation encouraging limiting unit；
Fig. 3 is stator over-current limiting unit structural representation；
Fig. 4 is maximum idle limiting unit structural representation；
Fig. 5 is that low limiting unit of encouraging is connected to the structural representation of Gao Bimen；
Fig. 6 is that low limiting unit of encouraging is connected to the structural representation of voltage superposition point.
Detailed description of the invention
The present invention, on the basis of studying multiple excitation system limiting unit operation principle and actual measurement characteristic, established and encouraged
Restriction, low restriction, stator overload limit (including stator over-current restriction, the maximum idle restriction two kinds) model of encouraging, and point
Do not give each unit output and and be connected to voltage superposition point before high (low) is connected to PID regulation unit than door, after PID regulation unit
Deng the model structure under various ways and parameter, can select according to actual device, the output point of three limiting units is permissible
Arbitrarily select between solid line and dotted line, combination in any.The access way of each limiting unit is shown in that (Fig. 1 is whole generator excitation to Fig. 1
System model) shown in, except three limiting units, other each unit is all prior art.Through emulation testing, institute's established model action
Reliable and stable, definite value is accurate, is consistent with device actual measurement characteristic, meets engineer applied requirement.
Embodiment one: as it is shown in figure 1, the invention provides a kind of generator excitation system including polymorphic type limiting unit
System, including low encourage limiting unit, cross encourage limiting unit, stator overload limit unit, PID regulate unit, power amplification unit.
The input of described stator overload limit unit has generated power P, generator reactive Q and Generator end electric current It, institute
The output of the stator overload limit unit stated is connected to the low ratio door LV1 input before PID regulation unit, low than door LV1's
Outfan is connected to the low input than door LV2 before PID regulation unit, and generator terminal voltage Vt and generator reactive Q is defeated
Entering to adjusting difference unit, adjust difference unit to export to first adder, voltage set-point Vref also inputs to first adder, and first adds
The outfan input of musical instruments used in a Buddhist or Taoist mass, to the output of Gao Bimen HV1, the Gao Bimen HV1 before PID regulation unit to low ratio door LV2, low compares door
The outfan of LV2 is connected to voltage superposition point adder, and PSS exports to voltage superposition point adder, voltage superposition point adder
Output regulate unit to PID, PID regulation unit output through low than door LV3, Gao Bimen HV2 after to power amplification unit, power
Amplifying unit output generator rotor voltage Efd.
As it is shown on figure 3, the type that stator over-current limiting unit is stator overload limit.Stator over-current limiting unit
Include calculating heat accumulation unit, superheat value reaches definite value judging unit, allow again to cross stream judging unit, Generator end electric current
It input is to current measurement link, and the output of current measurement link is with up to correction link and calculating heat accumulation unit, corrector loop
The output of joint and stator current limit set-point and export to the 4th adder, and the output of the 4th adder is to stator current or idle
Regulation selects the 6th multiplier of unit.Generator reactive Q inputs to reactive power measurement link, the output of reactive power measurement link and nothing
The output of merit set-point selects the 7th of unit to take advantage of to fifth adder, the output of fifth adder to stator current or Reactive-power control
Musical instruments used in a Buddhist or Taoist mass, stator current or Reactive-power control select the output of unit to proportional component, and proportional component output is to open or locking stator
Electric current limits the adder of output unit.Output to the superheat value calculating heat accumulation unit reaches definite value judging unit and allows again
Crossing stream judging unit, superheat value reaches the output of definite value judging unit, and to the NAND gate allowing again to cross stream judging unit, (this is with non-
Door reaches the multiplier of definite value judging unit and is connected with superheat value), stator current or the 6th multiplier of Reactive-power control selection unit,
Open or locking stator current limits the not gate of output unit, the outfan of not gate and locking value E to multiplier, multiplier defeated
Going out to adder, the output of adder to first is low than door LV1 input.
What described mistake was encouraged before limiting unit may be connected to PID regulation unit low regulates low ratio after unit than door LV1 or PID
Door LV3.It was illustrated in figure 2 and encouraged the low structure chart than door LV1 before limiting unit is connected to PID regulation unit, described mistake
Encourage limiting unit include calculating heat accumulation unit, transient current reaches top value judging unit, superheat value reaches definite value judging unit, top
Value or cross is encouraged action judging unit, was allowed again to cross and encourage judging unit, opening or locking and cross and encourage output unit, rotor current Ifd
Being input to measurement links, the output of measurement links is input simultaneously to correction link, transient current reaches top value judging unit and calculating
Heat accumulation unit, the output of wherein said correction link and given value of current value select unit output common to second adder,
The output of second adder is to the first multiplier.The described output calculating heat accumulation unit reaches definite value judgement with up to superheat value
The adder of unit and allowed again to cross to encourage judging unit, superheat value reaches the output of definite value judging unit with up to open or locking
Cross that encourage in output unit or door, allowed again to cross NAND gate, the top value encouraging in judging unit or crossed and encourage action judging unit
Or door, described top value or cross that encourage action judging unit or door output and select unit to given value of current value.Described transient current
Reach definite value judging unit export to top value simultaneously or cross and encourage the not gate of action judging unit, opening or locking and cross and encourage in output unit
Or door, open or locking crosses that encourage in output unit or door output to the first multiplier, the output of the first multiplier to than
Example unit, the output of proportional unit to the 3rd adder, open or locking is crossed and is encouraged in output unit the output of multiplier also to the
Three adders, low ratio door LV1 before the output of the 3rd adder to PID regulation unit.
Served as encouraging after limiting unit is connected to PID regulation unit low than door LV3 time, only need proportional component in fig. 2
Plus governing loop between output and the input of the 3rd adder, other is identical with Fig. 2.
Described low limiting unit of encouraging may be connected to height after the Gao Bimen HV1 before PID regulates unit, or PID regulation unit
Ratio door HV2, it is possible to be connected to voltage superposition point adder.Be illustrated in figure 5 low encourage limiting unit be connected to PID regulation unit before
The structure chart of Gao Bimen HV1, described low limiting unit of encouraging includes that the low compensating unit of set end voltage, low encouraging limit definite value list
Unit, the open or low restriction output unit of encouraging of locking, generator terminal voltage Vt inputs to voltage measurement link, voltage measurement link
Output to the low compensating unit of set end voltage, the low compensating unit of set end voltage exports to the 3rd multiplier.Generated power P exports
To active power measurement link, active power measurement link output to low restriction definite value table unit of encouraging, low restriction definite value table unit of encouraging exports extremely
3rd multiplier, the output of the 3rd multiplier is exported to the 8th adder by filtering link；Generator reactive Q output is to idle
Measurement links, the output of reactive power measurement link to correction link, the output of correction link to the 8th adder, the 8th adder defeated
Go out and encourage restriction output unit and the 4th multiplier, the output of the 4th multiplier to proportional component, ratio ring to opening or locking are low
The output of joint is to the 9th adder, and low the encouraging of open or locking limits the output of output unit to the 4th multiplier and the 9th addition
Device, the Gao Bimen HV1 before the output of the 9th adder to PID regulation unit.
When low encourage limiting unit be connected to Gao Bimen HV2 after PID regulation unit time, only need to be the proportional component in Fig. 5
Plus governing loop between output and the input of second adder, other is as structure in Fig. 5.
Being illustrated in figure 6 low limiting unit of encouraging and be connected to the structure chart of voltage superposition point adder, the lowest encouraging limits list
Unit includes the low compensating unit of set end voltage, low restriction definite value table unit of encouraging, and generator terminal voltage Vt input is to voltage measurement ring
Joint, the low compensating unit of the output of voltage measurement link to set end voltage, the low compensating unit of set end voltage exports to the 5th multiplier；
Generated power P output is to active power measurement link, and the output of active power measurement link is to the lowest restriction definite value table unit of encouraging, and low to encourage restriction fixed
Value table unit output is exported to the tenth adder to the 5th multiplier, the output of the 5th multiplier by filtering link；Electromotor
Idle Q output exports to correction link to reactive power measurement link, reactive power measurement link, and the output of correction link is to the tenth addition
Device, the output of the tenth adder is exported to voltage signal summing point adder by correction link.
Embodiment two: the invention discloses a kind of generator excited system including polymorphic type limiting unit, with enforcement
Stator overload limit unit unlike example one uses maximum idle limiting unit, and the output of maximum idle limiting unit is
Being connected to voltage superposition point adder, other is identical with embodiment one.
Being connected to the structure of the idle limiting unit of maximum of voltage superposition point adder as shown in Figure 4, maximum idle restriction is single
Unit includes maximum idle restriction definite value table, whether limiter reaches definite value judging unit, limiter action delay timing unit,
Returning unit, generated power P input to active power measurement link, active power measurement link exports to maximum idle restriction definite value table,
Maximum idle restriction definite value table exports to filtering link, and filtering link exports to the 6th adder and the 7th adder, electromotor
Idle Q input exports to correction link to reactive power measurement link, reactive power measurement link, and correction link 1 exports to the 6th adder
With the 7th adder, whether the output of the 6th adder to limiter reaches definite value judging unit, and whether limiter reaches definite value
The output of judging unit by limiter action delay timing unit to returning unit；Corrector loop is passed through in the output of the 7th adder
Joint 2 to the second multipliers, the output of described return unit is also to the second multiplier, the output of the second multiplier to voltage superposition point
Adder.
Embodiment three: the invention discloses a kind of generator excited system including polymorphic type limiting unit, with enforcement
Stator over-current limiting unit unlike example one is not attached to the low input than door LV1 before PID regulation unit, but connects
It is connected on the low input than door LV3 after PID regulation unit.Stator over-current limiting unit now and the stator over-current in Fig. 3
The difference of limiting unit is: this stator current limiting unit needs to increase regulation ring between proportional component and second adder
Joint, other is all identical with embodiment one.
Hereinafter the principle of each limiting unit is illustrated:
One, excessively limiting unit function declaration is encouraged
Cross and encourage the output of limiting unit in two kinds of situation: one is connected to low ratio door LV1 before PID regulation unit, and one is connected to
Low ratio door LV3 after PID regulation unit.(excessively encourage restriction action to refer to turn as in figure 2 it is shown, excessively encourage restriction (including that top value limits) action
Sub-heat accumulation reaches setting valve) after, excitation con-trol mode is transferred to rotor current by AVR actuator (automatic voltage regulative mode) and closes
Ring regulative mode, is restricted to set-point by rotor current.
1, cross and encourage limiting unit output and be connected to low structure chart than door LV1 before PID loop joint unit as in figure 2 it is shown, in Fig. 2
Shown each unit function introduction:
1. " calculating heat accumulation B ' " unit: include multiplier, adder, integral element in this element, measurement links
Signal input is to multiplier, and the output of multiplier and If ∞ are to adder, the output of adder output after integral element
Value is heat accumulation B '.
B '=∫ (Ifd2-If∞2) dt, wherein Ifd is actual measurement rotor current, and If ∞ is that rotor current allows to run for a long time
Value, heat accumulation B ' can add and can subtract, but minimum can not be less than 0.
2. " superheat value reaches definite value and judges " unit: this element includes adder, multiplier, judging unit, it is allowed to again
Cross output and the overheated coefficient B so far multiplier encouraging judging unit, the output of multiplier and heat accumulation value B ' to adder, addition
The output of device judges.
B is that overheated coefficient, i.e. rotor cross heat accumulation maximum permissible value B=(Ifmax 2-If ∞2) × tmax, tmax are Ifmax
The lower permission time, IfmaxRefer to rotor current maximum permissible value, also referred to as top value.
If B '-B ＞ 0, cross and encourage action, be output as 1；B '-B≤0, crosses and encourages, be output as 0.
After excessively encouraging action, overheated coefficient B is blocked, it is ensured that excessively encouraging and be constantly in operating state, period does not allow again
Cross and encourage；Until superheat value B ' less than after setting valve (return value), overheated coefficient B is open, it is allowed to again cross and encourage.
3. " transient current reaches top value and judges " unit: rotor current Ifd reaches top value 1.02I setfmaxAfter, this unit
Instantaneous rotor current is limited to Ifmax, and export 1 and keep, treat that electric current is less than 0.90IfmaxAfter be output as 0.
This unit can repeatedly action, but served as encouraging when (overheated) is in operating state and be blocked.
4. " top value or mistake are encouraged action and judged ", " selection of given value of current value " unit:
Top value or cross and encourage action judging unit and include a not gate and one or door, the input of not gate is that transient current reaches top value
The output of judging unit, the output of not gate and superheat value reach the output of definite value judging unit to or door, or the output of door is to electric current
Set-point selects unit.
By judging top value, crossing the action situation encouraged, select different set-points.Top value, mistake are encouraged and export logic true value
Table is as follows:
| Top value limits | Cross and encourage restriction | Output valve | Select definite value |
| Motionless 0 | Motionless 0 | 1 | 0.95—1.0Ifn |
| Motionless 0 | Action 1 | 1 | 0.95—1.0Ifn |
| Action 1 | Motionless 0 | 0 | Ifmax |
| Action 1 | Action 1 | 1 | 0.95—1.0Ifn |
5. unit " after heat accumulation reaches return value excessively, it is allowed to again cross and encourage judgement ": this unit includes NAND gate, NAND gate
Input be the output that superheat value reaches definite value judging unit, heat accumulation value B ' through calculating B '-KFHJudge after B, it is judged that
Output is to NAND gate, and the output of NAND gate to superheat value reaches definite value judging unit.
The effect of this unit is after excessively encouraging restriction action, does not the most allow rotor again to cross stream, until
Rotor heat accumulation value return to setting valve (return value) below till, blocking time depends on the time that heat accumulation reduces.Wherein KFH
For overheated drop-off to pick-up radio, for simulating the heat radiation time of generator amature, can be set according to the setting parameter of actual device.
It is as follows that heat accumulation B ', mistake encourage working value, return value and output logic true value table:
6. " open or locking is crossed and encouraged output " unit: this element includes or the input of door, not gate, multiplier, or door is
Superheat value reaches the output of definite value judging unit, transient current reaches the output of top value judging unit, or the output of door is to the first multiplication
Device and not gate, the output of not gate and locking value E are to multiplier, and the output of multiplier is to the 3rd adder.
Time properly functioning, the output of rotor current closed loop regulative mode is set to 0, simultaneously by locking value E(mono-more than AVR ring
Joint export positive amplitude limit on the occasion of, it is ensured that cross encourage restriction will not malfunction) output, excitation con-trol operates in AVR shaping modes.Serve as encouraging
Limit, top value limits any one action, then by open for the output of rotor current closed loop regulative mode, put in locking value E loop simultaneously
0, enter the regulation of rotor current closed loop, rotor current is restricted to set-point.
7. encourage restriction and the output of AVR link accesses and low compares than door owing to crossing, therefore served as encouraging restriction action
If period due to the recovery of set end voltage make rotor current be less than limits value time, can automatically switchback AVR link run.
8. " governing loop " unit: low after output is connected to PID regulation unit have this unit (same main ring of parameter than door LV3
PID), model and parameter are identical with the PID of AVR link regulation cell parameters；Output be connected to PID regulation before low than door LV1 then without
This unit (takes 1).
9. in order to ensure steadily be reduced to by rotor current after encouraging restriction action set-point, and greater impact is not caused,
A correction link is addition of on measuring the current in the rotor passage.
10. in block diagram, parameter declaration is as follows:
Two, stator overload limit Elementary Function explanation
Stator overload limit operation principle divides two kinds: one is using stator current as measuring and limiting object, action
Post regulator transfers stator current closed loop regulative mode to, and stator current is restricted to set-point；Another kind is to make with P Q curve
For measuring and limiting object, after deferred action, actuator transfers permanent Reactive-power control mode to, is restricted to set-point by idle.
1, accompanying drawing 3 is shown in by stator over-current limiting unit structure chart.
Each unit function introduction:
1. " calculating heat accumulation B ' " unit (structure is identical with structure in Fig. 2): B '=∫ (It2-It∞2) dt, wherein It is real
Surveying stator current value, It ∞ is that stator current allows runtime value for a long time, and heat accumulation can add and can subtract, but minimum can not be less than 0.
2. " superheat value reaches definite value and judges " unit (structure is identical with structure in Fig. 2): B is that overheated coefficient, i.e. stator are overheated
Accumulation maximum permissible value B=(Itmax 2-It ∞2) × tmax, tmax are ItmaxThe lower permission operation time.
B '-B ＞ 0, crosses flowing and makees, be output as 1；B '-B≤0, crosses stream and does not moves, be output as 0.
After crossing flowing work, overheated coefficient B is blocked, it is ensured that crossing stream and be constantly in operating state, period does not allow again
Cross stream；Until superheat value B ' less than after setting valve (return value), overheated coefficient B is open, it is allowed to again cross stream.
3. unit (structure is identical with structure in Fig. 2) " after heat accumulation reaches return value excessively, it is allowed to again cross stream and judge ": same to mistake
Encourage in restriction and describe with Elementary Function.
4. " stator current or Reactive-power control select " unit: this element includes two multipliers, adder, not gates.
When after stator over-current restriction action, stator current is reduced to limit value, but idle ought reduce to 0 and stator current
When being still not up to set-point (occurring over just generated power more than in the case of the specified apparent energy of electromotor), stator current limits
Stopping is subtracted magnetic by unit processed, and controlled plant transfers to permanent Reactive-power control, controls idle to be not less than 0.
5. " open or locking stator current limit to output " unit (lacked compared with this element in Fig. 2 one or):
Time properly functioning, stator current closed loop regulating loop is set to 0, and more than AVR link, locking value E(mono-is exported positive amplitude limit simultaneously
On the occasion of, it is ensured that cross encourage restriction will not malfunction) output, conditioner operation is at AVR shaping modes.When stator over-current restriction action,
Then that stator current closed loop regulating loop is open, locking value E loop is set to 0 simultaneously, enter the regulation of stator current closed loop, by stator
Electric current is restricted to set-point.
6. " governing loop " unit: low after output is connected to PID have this unit (parameter is with main ring PID) than door LV3, model
And parameter is identical with the pid parameter of AVR；Output be connected to PID before low than door LV1 then without this unit (taking 1).
7. low comparing than door, therefore when stator over-current restriction is accessed owing to stator over-current limits with AVR passage
When during action, stator current returns to less than limits value, can automatically run by switchback AVR passage.
8. in order to ensure steadily be reduced to by stator current after encouraging restriction action set-point, and greater impact is not caused,
A correction link is addition of on stator current Measurement channel.
9. in block diagram, parameter declaration is as follows:
2, as shown in Figure 4, each unit is described below maximum idle limiting unit structure chart:
1. " maximum idle restriction definite value table " unit: with 5 points (P1, Q1), (P2, Q2), (P3, Q3), (P4, Q4),
(P5, Q5) defines maximum idle restriction definite value, and other takes interpolation calculation to obtain correspondence by the meritorious P of actual measurement
Idle restriction definite value Qzd.
2. " whether limiter reaches definite value judges " unit: the idle Q of actual measurement compares with definite value Qzd.Q-Qzd ＞ 0, defeated
Going out is 1, starts timing；Q-Qzd≤0, limits and does not moves, be output as 0, timing clear 0.
3. " limiter action delay timing " unit: carrying out timing when generator reactive Q is more than definite value, period returns such as Q
Time below definite value, timing clear 0.
4. " after the limiter time delay T second, action is by the idle setting valve that is restricted to, and returns after keeping the T ' second " unit: defeated time normal
Go out 0, when generator reactive Q continue to exceed the definite value time more than T time, idle limiting unit action generator reactive is restricted to
Return after the T ' time that definite value, output 1 holding are adjusted, export 0 simultaneously.
When this unit exports 0, maximum idle restriction output is forced to 0；When this unit exports 1, will be open maximum idle
Limiting output valve to voltage superposition point, action, in subtracting magnetic, makes idle to return to setting valve.
5. in block diagram, parameter declaration is as follows:
Three, low limiting unit function declaration is encouraged
Low encourage limiting unit output and have two kinds: a kind of is to access in the way of Gao Bimen (before point PID regulation unit and PID
After regulation unit), when low encourage restriction action after, actuator transfers permanent Reactive-power control mode to, is restricted to set-point by idle；Another
Kind be to be connected to voltage signal summing point, when low encourage restriction action after, by increasing the regulative mode of regulator voltage set-point, will
Idle it is restricted to set-point.
1, low encourage limiting unit (being accessed by Gao Bimen mode) structure chart is as shown in Figure 5.
1. " low encouraging limits definite value table " unit: with 5 points (P1, Q1), (P2, Q2), (P3, Q3), (P4, Q4), (P5, Q5)
Defining into mutually idle restriction definite value, other is by the meritorious P of actual measurement, takes interpolation calculation to obtain correspondence low and encourages idle
Limit definite value.
2. " the low compensation of set end voltage " unit: purpose is less than during in rated value at set end voltage, encourages restriction definite value by low
Raise, limit under-excitation ability.The definite value obtained by interpolation calculation (is multiplied by U after voltage compensation2As physical constraints definite value after)
Qzd.This voltage compensation unit can carry out throwing according to practical adjustments device situation and move back selection.
3. " open or locking is low encourages restriction output " unit: the idle Q of actual measurement compares with definite value Qzd.Qzd-Q ＞ 0, defeated
Going out is 1, restriction action；Qzd-Q≤0, limits and does not moves, be output as 0.
Time properly functioning, Reactance Closed Loop regulating loop is set to 0, simultaneously by negative less than the output of AVR link for locking value E(mono-
The negative value of amplitude limit, it is ensured that low encourage restriction will not malfunction) output, conditioner operation is at AVR shaping modes.Restriction action is encouraged when low,
Then will be open without closed loop regulating loop, locking value E loop is set to 0 simultaneously, enter the regulation of normal Reactance Closed Loop, be restricted to idle
Set-point.
4. " governing loop " unit: Gao Bimen HV2 has this unit (parameter is with AVR channel PID) after output is connected to PID,
Model and parameter are identical with the pid parameter of AVR；Output be connected to PID regulation unit before Gao Bimen HV1 then without this unit (taking 1).
5. due to low encourage restriction with AVR passage access Gao Bimen compare, therefore when low encourage restriction action during
Idle when returning to more than limits value, can automatically run by switchback AVR passage.
6. in block diagram, parameter declaration is as follows:
2, low encouraging limiting unit (being connected to voltage signal summing point) structure chart as shown in Figure 6, each unit function introduction is as follows:
1. " low encouraging limits definite value table " unit: ibid.
2. " the low compensation of set end voltage " unit: ibid.
Time the most properly functioning, the idle Q of actual measurement compares with definite value Qzd.Qzd-Q ＞ 0, restriction action, just it is being output as one
Value makes idle returning to limit definite value to voltage superposition point, action in increasing magnetic；Qzd-Q≤0, limits and does not moves, and bottoming width is 0.
4. in block diagram, parameter declaration is as follows:
Claims (8)
1. include a generator excited system for polymorphic type limiting unit, including low encourage limiting unit, cross encourage limiting unit,
PID regulates unit, power amplification unit, it is characterised in that: also including stator overload limit unit, described stator is the most negative
The input of lotus limiting unit has generator reactive power and Generator end electric current, described stator overload limit unit defeated
Going out to be connected to the first low ratio door before PID regulation unit, first low connects the second low ratio door input than the outfan of door, electromotor
Set end voltage and generator reactive power input, to adjusting difference unit, adjust difference unit to export to first adder, and voltage set-point is also
Inputting to first adder, the output of Gao Bimen, Gao Bimen before the outfan input of first adder to PID regulation unit is extremely
Second low ratio door, second low is connected to voltage superposition point adder than the outfan of door, and the output of PSS unit adds to voltage superposition point
Musical instruments used in a Buddhist or Taoist mass, the output of voltage superposition point adder to PID regulates unit, the PID regulation unit output low ratio after PID regulation unit
Door, Gao Bimen to power amplification unit, power amplification unit output generator rotor voltage；Described stator overload limit list
Unit is stator over-current limiting unit, and stator over-current limiting unit includes calculating heat accumulation unit, superheat value reaches definite value and judges single
Unit, allowed again to cross stream judging unit, the input of Generator end electric current to current measurement link, the output of current measurement link with
Limit set-point up to correction link and calculating heat accumulation unit, the output of correction link and stator current to export to the 4th addition
Device, the output of the 4th adder selects the 6th multiplier of unit to stator current or Reactive-power control, and generator reactive power is defeated
Entering to reactive power measurement link, reactive power measurement link exports to fifth adder, and idle set-point exports to fifth adder, and the 5th
It is single that the output of adder selects the 7th multiplier of unit, stator current or Reactive-power control to select to stator current or Reactive-power control
The output of unit limits output unit to proportional component, proportional component output to open or locking stator current；Calculate heat accumulation list
Output to the superheat value of unit reaches definite value judging unit and again crosses stream judging unit, and superheat value reaches the output of definite value judging unit extremely
Again cross stream judging unit and stator current or Reactive-power control select unit, opening or locking stator current to limit output unit,
Open or locking stator current limits output unit output and low compares door to before PID regulation unit first.
2. include a generator excited system for polymorphic type limiting unit, including low encourage limiting unit, cross encourage limiting unit,
PID regulates unit, power amplification unit, also includes stator overload limit unit, described stator overload limit unit
Input have generator active power, generator reactive power, the output of described stator overload limit unit to be connected to electricity
Laminated is added some points adder, and generator terminal voltage and generator reactive power input, to adjusting difference unit, adjust difference unit output to the
One adder, voltage set-point also inputs to first adder, before the outfan input of first adder to PID regulation unit
The output of Gao Bimen, Gao Bimen to the second low ratio door, first low ratio the outfan of door connect the described second low input than door,
Described second low is connected to voltage superposition point adder than the outfan of door, and PSS output to voltage superposition point adder, voltage is folded
The output of adder of adding some points regulates unit to PID, low than door, Gao Bimen extremely after PID regulation unit of PID regulation unit output
Power amplification unit, power amplification unit output generator rotor voltage；It is characterized in that: described stator overload limit list
Unit uses maximum idle limiting unit, and maximum idle limiting unit includes maximum idle restriction definite value table, generated power merit
Rate input is to active power measurement link, and the output of active power measurement link is to maximum idle restriction definite value table, maximum idle restriction definite value table
Output is to filtering link, and filtering link output to the 6th adder and the 7th adder, generator reactive power input is to idle
Measurement links, reactive power measurement link output to correction link, correction link output to the 6th adder and the 7th adder, the 6th
Whether the output of adder reaches definite value judging unit to limiter, and whether limiter reaches the output of definite value judging unit is passed through
Limiter action delay timing unit, to returning unit, returns the output of unit to the second multiplier, the output of the 7th adder
By correction link to the second multiplier, the output of the second multiplier to voltage superposition point adder.
3. include a generator excited system for polymorphic type limiting unit, including low encourage limiting unit, cross encourage limiting unit,
PID regulates unit, power amplification unit, it is characterised in that: also including stator overload limit unit, described stator is the most negative
The input of lotus limiting unit has generator reactive power and Generator end electric current, the output of described stator over-current limiting unit
Being connected to the low input than door after PID regulation unit, the first low outfan than door before PID regulation unit connects second
The low input than door, generator terminal voltage and generator reactive power input, to adjusting difference unit, adjust difference unit output to the
One adder, voltage set-point also inputs to first adder, before the outfan input of first adder to PID regulation unit
The output of Gao Bimen, Gao Bimen is to the second low ratio door, and second low is connected to voltage superposition point adder than the outfan of door, PSS
Output is to voltage superposition point adder, and the output of voltage superposition point adder to PID regulates unit, PID regulation unit output warp
Low ratio door, Gao Bimen to power amplification unit after PID regulation unit, power amplification unit output generator rotor voltage；Its
It is characterised by: described stator overload limit unit uses stator over-current limiting unit, and stator over-current limiting unit includes
Calculate heat accumulation unit, superheat value reaches definite value judging unit, allow again to cross stream judging unit, and Generator end electric current inputs extremely
Current measurement link, the output of current measurement link is with up to correction link and calculating heat accumulation unit, the output of correction link
Limit set-point output with stator current to select to the 4th adder, the output of the 4th adder to stator current or Reactive-power control
6th multiplier of unit, generator reactive power input to reactive power measurement link, reactive power measurement link exports to fifth adding
Device, idle set-point output to fifth adder, the output of fifth adder to stator current or Reactive-power control select unit
7th multiplier, stator current or Reactive-power control select the output of unit to proportional component, and proportional component output is by regulation ring
Joint limits output unit to open or locking stator current；Output to the superheat value calculating heat accumulation unit reaches definite value judging unit
Again crossing stream judging unit, superheat value reaches the output of definite value judging unit to again crossing stream judging unit and stator current or nothing
Merit regulation selects unit, opening or locking stator current to limit output unit, and open or locking stator current limits output unit
Output is low after regulating unit to PID compares door.
4., according to a kind of generator excited system including polymorphic type limiting unit described in claim 1 or 2 or 3, it is special
Levy and be: described low limiting unit of encouraging includes the low compensating unit of set end voltage, low encourages restriction definite value table, opening or locking is low encourages
Limiting output unit, generator terminal voltage inputs to voltage measurement link, and the output of voltage measurement link is low to set end voltage
Compensating unit, set end voltage low compensating unit output to the 3rd multiplier, generator active power exports to active power measurement link,
The output of active power measurement link exports to the 3rd multiplier to low restriction definite value table of encouraging, low restriction definite value table of encouraging, the 3rd multiplier
Export and exported to the 8th adder by filtering link；Generator reactive power exports to reactive power measurement link, reactive power measurement ring
Joint output is to correction link, the output of correction link to the 8th adder, and the output of the 8th adder is the most open or locking is low encourages
Limiting output unit and the 4th multiplier, the low output encouraging restriction output unit of open or locking adds to the 4th multiplier and the 9th
Musical instruments used in a Buddhist or Taoist mass, the output of the 4th multiplier to proportional component, the output of proportional component to the 9th adder, the output of the 9th adder is extremely
Gao Bimen before PID regulation unit.
5., according to a kind of generator excited system including polymorphic type limiting unit described in claim 1 or 2 or 3, it is special
Levy and be: described low limiting unit of encouraging includes the low compensating unit of set end voltage, low encourages restriction definite value table, opening or locking is low encourages
Limiting output unit, generator terminal voltage inputs to voltage measurement link, and the output of voltage measurement link is low to set end voltage
Compensating unit, set end voltage low compensating unit output to the 3rd multiplier, generator active power exports to active power measurement link,
The output of active power measurement link exports to the 3rd multiplier to low restriction definite value table of encouraging, low restriction definite value table of encouraging, the 3rd multiplier
Export and exported to the 8th adder by filtering link；Generator reactive power exports to reactive power measurement link, reactive power measurement ring
Joint output is to correction link, the output of correction link to the 8th adder, and the output of the 8th adder is the most open or locking is low encourages
Limiting output unit and the 4th multiplier, the low output encouraging restriction output unit of open or locking adds to the 4th multiplier and the 9th
Musical instruments used in a Buddhist or Taoist mass, the output of the 4th multiplier to proportional component, the output of proportional component is by governing loop to the 9th adder, and the 9th adds
The output of musical instruments used in a Buddhist or Taoist mass to PID regulation unit after Gao Bimen.
6., according to a kind of generator excited system including polymorphic type limiting unit described in claim 1 or 2 or 3, it is special
Levy and be: described low limiting unit of encouraging includes that the low compensating unit of set end voltage, low encouraging limit definite value table, generator terminal voltage
Input is to voltage measurement link, the low compensating unit of the output of voltage measurement link to set end voltage, the low compensating unit of set end voltage
Exporting to the 5th multiplier, generator active power output to active power measurement link, the output of active power measurement link encourages restriction to low
Definite value table, low restriction definite value table of encouraging exports to the 5th multiplier, and the output of the 5th multiplier is exported to the tenth by filtering link
Adder；Generator reactive power output exports to correction link to reactive power measurement link, reactive power measurement link, correction link
Exporting to the tenth adder, the output of the tenth adder is exported to voltage signal summing point adder by correction link.
7., according to a kind of generator excited system including polymorphic type limiting unit described in claim 1 or 2 or 3, it is special
Levy and be: described mistake is encouraged limiting unit and included given value of current value and select unit, calculate heat accumulation unit, transient current and reach top
Value judging unit, superheat value reach definite value judging unit, top value or cross encourage action judging unit, allowed again cross encourage judging unit,
Open or locking is crossed and is encouraged output unit, and rotor current is input to measurement links, and the output of measurement links is input simultaneously to corrector loop
Joint, transient current reach top value judging unit and calculate heat accumulation unit, the output of described correction link to second adder, electricity
Stream set-point selects unit also to export to second adder, the output of second adder to the first multiplier, described calculating heat
The output of accumulative element is with reaching definite value judging unit up to superheat value and again excessively encouraging judging unit, and superheat value reaches definite value and judges single
The output of unit is crossed that encourage in output unit or door with up to open or locking, is again crossed the NAND gate encouraging in judging unit, described
Transient current reach definite value judging unit output with up to top value or cross encourage the not gate of action judging unit, opening or locking
Encouraging in output unit or door, open or locking is crossed and is encouraged in output unit or the output of door is to the first multiplier, the first multiplier
Output to proportional unit, the output of proportional unit to the 3rd adder, before the outfan of the 3rd adder to PID regulation unit
First low compares door.
8., according to a kind of generator excited system including polymorphic type limiting unit described in claim 1 or 2 or 3, it is special
Levy and be: described mistake is encouraged limiting unit and included given value of current value and select unit, calculate heat accumulation unit, transient current and reach top
Value judging unit, superheat value reach definite value judging unit, top value or cross encourage action judging unit, allowed again cross encourage judging unit,
Open or locking is crossed and is encouraged output unit, and rotor current is input to measurement links, and the output of measurement links is input simultaneously to corrector loop
Joint, transient current reach top value judging unit and calculate heat accumulation unit, the output of described correction link to second adder, electricity
Stream set-point selects unit also to export to second adder, the output of second adder to the first multiplier, described calculating heat
The output of accumulative element is with reaching definite value judging unit up to superheat value and again excessively encouraging judging unit, and superheat value reaches definite value and judges single
The output of unit is with crossing encourage in output unit or door up to open or locking and again crossing the NAND gate encouraging in judging unit, described
Transient current reach the output of definite value judging unit with up to top value or cross and encourage the not gate of action judging unit and opening or locking
Cross encourage in output unit or door, or the output of door is to the first multiplier, the output of the first multiplier to proportional unit, ratio list
The output of unit is by regulation unit to the 3rd adder, and the outfan of the 3rd adder to PID is low after regulating unit compares door.
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| CN105024601B (en) * | 2014-04-23 | 2017-09-01 | 国家电网公司 | The excitation of generator is low to encourage method for limiting and device |
| CN106532742B (en) * | 2016-11-23 | 2019-07-30 | 云南电网有限责任公司电力科学研究院 | A kind of AVR excitation system transfer function model |
| CN106533290B (en) * | 2016-11-24 | 2019-04-23 | 华北电力科学研究院有限责任公司 | A kind of the stator current method for limiting and device of automatic excitation adjustor of generator |
| CN109088443B (en) * | 2018-08-13 | 2020-06-05 | 华北电力科学研究院有限责任公司 | Over-excitation limit optimization method and system for excitation regulator |
| CN109802444B (en) * | 2018-11-26 | 2020-12-15 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Dynamic cooperation evaluation method for over-excitation limitation and over-current protection |
| CN109872021B (en) * | 2018-11-27 | 2024-01-16 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Dynamic matching assessment method for low excitation limit and loss of excitation protection |
| CN110311602B (en) * | 2019-06-17 | 2020-11-24 | 国网江苏省电力有限公司电力科学研究院 | Low excitation limit optimization setting method and system for excitation regulator |
| CN112952784B (en) * | 2021-02-24 | 2024-05-10 | 国网浙江省电力有限公司电力科学研究院 | Excitation variable overload limiter applicable to flexible excitation system |
| CN112290838B (en) * | 2020-10-15 | 2022-12-06 | 智新控制系统有限公司 | Method and system for controlling locked rotor of permanent magnet synchronous motor for electric automobile |
| CN115133823B (en) * | 2022-09-01 | 2022-12-13 | 广州擎天实业有限公司 | Control method and device of excitation system |
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