CN110247407A - A kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling - Google Patents
A kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling Download PDFInfo
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- CN110247407A CN110247407A CN201910519210.4A CN201910519210A CN110247407A CN 110247407 A CN110247407 A CN 110247407A CN 201910519210 A CN201910519210 A CN 201910519210A CN 110247407 A CN110247407 A CN 110247407A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
Abstract
The invention discloses a kind of generator Subsynchronous Damping Controller parameter tuning methods of channel decoupling.The technical solution adopted by the present invention are as follows: Numerical Simulation Analysis based on subsynchronous risk machine set system passes through field measurement and obtains damping characteristic data；Based on channel Decoupling Theory, the subsynchronous multiple torque coefficient frequency characteristic in system nature channel, rotor-exciting channel and stator generator terminal channel is calculated, and then obtains the phase-frequency characteristic and damping coefficient frequency characteristic in each channel；It is finally independently adjusted using channel phases, the setting method of damping results linear superposition, target is optimized for the comprehensive damping coefficient of system, decoupling adjusting is carried out to the control parameter of each additional channel Subsynchronous Damping Controller phase shift link and gain link.It can realize that the decoupling of Subsynchronous Damping Controller parameter is adjusted using the Subsynchronous Damping Controller parameter tuning method that the present invention designs, facilitate the design optimization of multichannel Subsynchronous Damping Controller parameter.
Description
Technical field
The invention belongs to electric power system stability control technical field, specifically a kind of generator time of channel decoupling is same
Walk parameter tuning method of damping controller.
Background technique
Sub-synchronous oscillation first appears in the system that steam turbine generator is exported through remote serial supplementary line, will cause power generation
The serious consequence of arbor system damage.In recent years, the sending end unit and new energy in direct current transportation access weak grid on a large scale
System in sub-synchronous oscillation all occurred, seriously affected the stable operation of electric system.
From the effective measures of generator side inhibition sub-synchronous oscillation, there are two main classes at present: additional based on conventional excitation is encouraged
Magnetic damping controller SEDC and supplementary subsynchronous damping control device SSDC based on generator terminal power electronics new equipment.It is existing subsynchronous
The setting method of damping controller can be divided into three classes again: based on parameter tuning method (abbreviation analytic method), the base for simplifying analytic equation
In the global optimization parameter tuning method (abbreviation Global Optimization Method) of numerical simulation model and parameter tuning based on on-the-spot test
Method (abbreviation on-the-spot test method).
Analytic method is designed control Global Optimization Method parameter by establishing electrical damping model, to meet time needed
Synchronous damping, current analytic method often assume that magnetic linkage is constant, so that the reduced mechanical model of ac-dc axis decoupling is obtained, although
Be conducive to quick setting parameter, but can not reflect the damping characteristic of generator system comprehensively, it is difficult to ensure obtains optimal parameter
Adjusting.Global Optimization Method can be carried out using intelligent optimization algorithm based on accurate numerical simulation model, can theoretically realize the overall situation
The control parameter of optimization is adjusted, but is optimized adjusting result and compared the accuracy for relying on model, it is difficult to carry out school using field data
Core.On-the-spot test method is to join based on system real response, and then by formula setting method or engineering experience method to control
Number is adjusted, but since the damping characteristic that damping controller effect in channel generates intercouples with system damping, existing public affairs
Formula method and engineering experience method can not adjust the decoupling parameter that Subsynchronous Damping Controller is refined.
Summary of the invention
Regarding to the issue above and the shortcomings of the prior art, the generator that the present invention provides a kind of channel decoupling are subsynchronous
Parameter tuning method of damping controller, to promote the accuracy of the subsynchronous attitude conirol of generator.
In order to achieve the above objectives, according to an aspect of the present invention, Numerical Simulation Analysis or field measurement data are based on,
A kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling is provided comprising:
Step 1, Numerical Simulation Analysis based on subsynchronous risk machine set system or by field measurement obtain target
Adjust the subsynchronous multiple torque coefficient frequency characteristic K in system nature channel in frequency range0(jλ)；
Step 2 puts into a kind of additional channel Subsynchronous Damping Controller, and controller gain parameter is only arranged, and obtains at this time
The subsynchronous multiple torque coefficient frequency characteristic K of systems(jλ)；
Step 3, is based on channel Decoupling Theory, and the subsynchronous multiple torque coefficient frequency in Subsynchronous Damping Controller channel is special
Property Kc(j λ) passes through Ks(j λ) and K0(j λ) subtraction calculations obtain, and then obtain the phase-frequency characteristic and damping turn of the controller channel
Moment coefficient frequency characteristic；
Step 4, if using two kinds of additional channel Subsynchronous Damping Controllers simultaneously, what is put into exit step two is secondary
Synchronous damping controller puts into another additional channel Subsynchronous Damping Controller, obtains by above-mentioned steps two and step 3 another
A kind of phase-frequency characteristic and damping coefficient frequency characteristic in Subsynchronous Damping Controller channel；
Step 5 is based on channel Decoupling Theory, with the phase-frequency characteristic in Subsynchronous Damping Controller channel and damping torque system
Number frequency characteristic is foundation, is independently adjusted using channel, the setting method of result linear superposition, with system in target adjusting frequency range
Comprehensive damping coefficient is optimized for target, carries out each additional channel Subsynchronous Damping Controller phase shift link and gain link
The decoupling of control parameter is adjusted.
Further, described Step 1: the following plural formula table of subsynchronous multiple torque coefficient frequency characteristic in two, three
Show:
K (j λ)=Ke(λ)+jλDe(λ),
Wherein, λ is the per unit value of frequency, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency
Rate characteristic.
I.e. above-mentioned K0(j λ)=Ke_0(λ)+jλDe_0(λ), Ks(j λ)=Ke_s(λ)+jλDe_s(λ), Kc(j λ)=Ke_c(λ)
+jλDe_c(λ)。
Further, the additional channel Subsynchronous Damping Controller in the step 2 includes: based on the attached of excitation system
Add Excitation Damping controller or the supplementary subsynchronous damping control device based on generator terminal power electronics equipment；It is attached in the step 4
Adding channel Subsynchronous Damping Controller includes: appended with field excitation damp controller based on excitation system and based on generator terminal power electronics
The supplementary subsynchronous damping control device of equipment, the appended with field excitation damp controller abbreviation rotor-exciting based on excitation system are logical
Road, the supplementary subsynchronous damping control device abbreviation stator generator terminal channel based on generator terminal power electronics equipment.
Further, the channel Decoupling Theory in the step 3 refers to, when Subsynchronous Damping Controller is inclined using revolving speed
Difference and its equivalent signal are inputted as controller, and system parameter and excitation automatic voltage regulator controller parameter or generator
One timing of group parameter, system nature channel and rotor-exciting channel or stator generator terminal channel mutually decouple, and each channel is subsynchronous
Multiple torque coefficient frequency characteristic linear superposition.
Further, the channel Decoupling Theory in the step 5 refers to, when Subsynchronous Damping Controller is inclined using revolving speed
Difference and its equivalent signal are inputted as controller, and generator 's parameter, system parameter and the control of excitation automatic voltage regulator
One timing of device parameter, system nature channel, rotor-exciting channel and stator generator terminal channel mutually decouple, and each channel is subsynchronous multiple
Torque coefficient frequency characteristic linear superposition.
Further, the phase-frequency characteristic formula in the step 3 and step 4 is expressed as follows:
Wherein, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency characteristic
According to another aspect of the present invention, the subsynchronous analytic modell analytical model based on subsynchronous first master pattern, provides one
The generator Subsynchronous Damping Controller parameter tuning method of kind channel decoupling, comprising:
Step 1, establishes the subsynchronous analytic modell analytical model based on subsynchronous first master pattern, and model includes two kinds additional logical
Road Subsynchronous Damping Controller is the appended with field excitation damp controller based on excitation system i.e. rotor-exciting channel respectively and is based on
Supplementary subsynchronous damping control device, that is, stator generator terminal channel of generator terminal power electronics equipment；Subsynchronous analytic modell analytical model is as follows:
Ks(p)=Δ Te/ Δ δ,
Wherein, p is Laplace operator, Δ TeFor electromagnetic torque deviation, Δ δ is power angle deviation；
Electromagnetic torque buggy model is as follows:
Wherein ψd0、ψq0Respectively stator d-axis and quadrature axis magnetic linkage Initial component, id0、iq0For stator d-axis and quadrature axis current
Initial component, ut0For stator voltage Initial component, ud0、uq0For stator d-axis and quadrature-axis voltage Initial component, xd(p)、xq(p) divide
Not Wei d-axis and quadrature axis operational Impedance, Δ idWith Δ iqFor d-axis and quadrature axis current deviation, Δ udWith Δ uqFor d-axis and quadrature axis electricity
Deviation is pressed, G (p) is transmission function of the excitation voltage to d-axis excitation, gpid(p) the PID control transmission function for being excitation AVR；
The dq axis component buggy model of set end voltage is as follows:
Wherein, MgFor excitation correlation conversion matrix, MdFor generator correlation conversion matrix, raFor stator winding resistance, xd’
And xq' it is d-axis and quadrature axis transient state reactance, gseIt (p) is rotor-exciting channel appended with field excitation damp controller transmission function；
Current deviation model is as follows, includes independent three parts: being respectively system nature channel current buggy model Δ id_0
With Δ iq_0, rotor-exciting channel current buggy model Δ id_seWith Δ iq_se, stator generator terminal channel current buggy model Δ id_ss
With Δ iq_ss；
Wherein, MeFor system line correlation conversion matrix, reFor system line equivalent resistance, xeFor the equivalent sense of system line
Property reactance, xceEquivalent condensance, g are mended for system line stringssIt (p) is stator generator terminal channel supplementary subsynchronous damping control device
Transmission function；
Step 2 is based on subsynchronous analytic modell analytical model, and system nature channel is subsynchronous in calculating acquisition target adjusting frequency range
Multiple torque coefficient frequency characteristic K0The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in (j λ), rotor-exciting channelse(jλ)、
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in stator generator terminal channelss(j λ), and then obtain the phase-frequency characteristic in each channel
With damping coefficient frequency characteristic；
Step 3 is based on channel Decoupling Theory, with the phase-frequency characteristic in Subsynchronous Damping Controller channel and damping torque system
Number frequency characteristic is foundation, is independently adjusted using channel, the setting method of result linear superposition, with system in target adjusting frequency range
Comprehensive damping coefficient is optimized for target, carries out each additional channel Subsynchronous Damping Controller phase shift link and gain link
The decoupling of control parameter is adjusted.
Further, described Step 1: the subsynchronous multiple torque coefficient frequency characteristic in two is indicated with following plural number formula:
K (j λ)=Ke(λ)+jλDe(λ),
Wherein, λ is the per unit value of frequency, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency
Rate characteristic.That is: K0(j λ)=Ke_0(λ)+jλDe_0(λ), Kse(j λ)=Ke_se(λ)+jλDe_se(λ), Kss(j λ)=Ke_ss(λ)+jλ
De_ss(λ)。
Further, the circular of the subsynchronous multiple torque coefficient frequency characteristic in each channel is such as in the step 2
Under:
By gse(p) and gss(p) it is set as 0, calculates subsynchronous multiple turn for obtaining system nature channel in target adjusting frequency range
Moment coefficient frequency characteristic K0(jλ)；
By gse(p) it is set as 1, gss(p) it is set as 0, and does not consider system nature channel current deviation, calculates and obtains mesh
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in mark adjusting frequency range internal rotor excitation channelse(jλ)；
By gse(p) it is set as 0, gss(p) it is set as 1, and does not consider system nature channel current deviation, calculates and obtains mesh
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in the mark adjusting default sub-unit terminal channel of frequency rangess(jλ)。
Further, the phase-frequency characteristic formula in the step 2 and step 3 is expressed as follows:
Wherein, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency characteristic.
The device have the advantages that being: being based on system nature channel, rotor-exciting channel and stator generator terminal channel
The characteristic mutually decoupled is independently adjusted, the method for comprehensive damping linear superposition based on channel phases, realizes the subsynchronous resistance in each channel
The decoupling of Buddhist nun's controller parameter is adjusted, and solving leads to Subsynchronous Damping Controller since system damping and phase intercouple,
Especially multichannel Subsynchronous Damping Controller cannot achieve the parameter designing problem of precisely decoupling adjusting.
Detailed description of the invention
Fig. 1 is the generator system structure in the specific embodiment of the invention comprising appended with field excitation damp controller (SEDC)
Figure；
Fig. 2 is the generator system knot in the specific embodiment of the invention comprising supplementary subsynchronous damping control device (SSDC)
Composition；
Fig. 3 is subsynchronous first master die in the specific embodiment of the invention comprising multichannel Subsynchronous Damping Controller
Type figure；
Fig. 4 is that numerical simulation calculates the system damping torque coefficient frequency characteristic obtained in the specific embodiment of the invention
Figure；
Fig. 5 is that numerical simulation calculates the rotor-exciting channel damping coefficient frequency obtained in the specific embodiment of the invention
Rate characteristic and phase-frequency characteristic figure；
Fig. 6 is that numerical simulation calculates the stator generator terminal channel damping coefficient frequency obtained in the specific embodiment of the invention
Rate characteristic and phase-frequency characteristic figure；
Fig. 7 is that analytic modell analytical model calculates the rotor-exciting channel damping coefficient frequency obtained in the specific embodiment of the invention
Rate characteristic and phase-frequency characteristic figure；
Fig. 8 is that analytic modell analytical model calculates the stator generator terminal channel damping coefficient frequency obtained in the specific embodiment of the invention
Rate characteristic and phase-frequency characteristic figure；
Fig. 9 is that analytic modell analytical model calculates the system damping torque coefficient frequency characteristic obtained in the specific embodiment of the invention
Figure.
Specific embodiment
Below with reference to embodiment and Figure of description, invention is further explained, but protection scope of the present invention
It is not limited to following embodiments.Within the spirit of the invention and the scope of protection of the claims, any modification present invention made
And change, both fall within protection scope of the present invention.
Appended with field excitation damp controller (SEDC) based on excitation system as shown in Figure 1, its by rotor-exciting channel to
Generator system provides subsynchronous damping.
Supplementary subsynchronous damping control device (SSDC) based on generator terminal power electronics equipment is as shown in Fig. 2, it passes through stator
Generator terminal channel provides subsynchronous damping to generator system.
Subsynchronous first master pattern for numerical simulation is as shown in figure 3, the model includes SEDC and SSDC two kinds times
Synchronous damping controller.
The system nature channel damping coefficient frequency characteristic obtained and subsynchronous damping control are calculated by numerical simulation
System damping torque coefficient frequency characteristic after device parameter tuning investment processed is as shown in Figure 4.
Rotor-exciting channel (SEDC) the damping coefficient frequency characteristic and phase-frequency characteristic that obtain are calculated by numerical simulation,
Including having compensation channel characteristic after uncompensated channel characteristic and parameter tuning, as shown in Figure 5.
Stator generator terminal channel (SSDC) the damping coefficient frequency characteristic and phase-frequency characteristic that obtain are calculated by numerical simulation,
Including having compensation channel characteristic after uncompensated channel characteristic and parameter tuning, as shown in Figure 6.
Rotor-exciting channel (SEDC) the damping coefficient frequency characteristic and phase-frequency characteristic that obtain are calculated by analytic modell analytical model,
Including having compensation channel characteristic after uncompensated channel characteristic and parameter tuning, as shown in Figure 7.
Stator generator terminal channel (SSDC) the damping coefficient frequency characteristic and phase-frequency characteristic that obtain are calculated by analytic modell analytical model,
Including having compensation channel characteristic after uncompensated channel characteristic and parameter tuning, as shown in Figure 8.
The system nature channel damping coefficient frequency characteristic obtained and subsynchronous damping control are calculated by analytic modell analytical model
System damping torque coefficient frequency characteristic after device parameter tuning investment processed is as shown in Figure 9.
Embodiment one
The generator Subsynchronous Damping Controller parameter tuning method for utilizing a kind of channel proposed to decouple is based on numerical value
Simulation analysis, to the SEDC and SSDC progress parameter tuning in subsynchronous first master pattern system, steps are as follows for specific adjusting:
Step 1 is based on numerical simulation software, establishes subsynchronous first master pattern as shown in Figure 3, simulation model packet
Containing two kinds of Subsynchronous Damping Controllers of SEDC and SSDC, simulation calculation obtains secondary same in the state that SEDC and SSDC are not put into
The subsynchronous multiple torque coefficient frequency characteristic K in system nature channel in cadence section0(j λ), according to answering for following subsynchronous multiple torque
Number expression formula, can be calculated the damping coefficient frequency characteristic D in system nature channele_0(λ), as shown in Figure 4；
K0(j λ)=Ke_0(λ)+jλDe_0(λ),
In formula, λ is the per unit value of frequency, Ke_0(λ) is the synchronizing torque coefficient frequencies characteristic in system nature channel, De_0
(λ) is the damping coefficient frequency characteristic in system nature channel.
Step 2 puts into SEDC damping controller, and controller gain parameter is only arranged, and the system obtained at this time is subsynchronous multiple
Torque coefficient frequency characteristic Ks_se(jλ)。
Step 3, is based on channel Decoupling Theory, and the subsynchronous multiple torque coefficient frequency in Subsynchronous Damping Controller channel is special
Property Kc_se(j λ) can pass through Ks_se(j λ) and K0(j λ) subtraction calculations obtain, and then obtain the damping torque system of SEDC control channel
Number frequency characteristic Dc_se(λ), and the phase-frequency characteristic Φ of SEDC control channel is obtained by following phase-frequency characteristic calculation formulac_se
(λ), as shown in Figure 5；
Step 4 exits SEDC damping controller, puts into SSDC damping controller, obtains by above-mentioned steps two and step 3
Obtain the phase-frequency characteristic Φ of SSDC control channelc_ss(λ) and damping coefficient frequency characteristic Dc_ss(λ), as shown in Figure 6.
Step 5 is based on channel Decoupling Theory, with the phase-frequency characteristic in Subsynchronous Damping Controller channel and damping torque system
Number frequency characteristic is foundation, is independently adjusted using channel phases, the setting method of damping results linear superposition, with 5Hz~45Hz
System damping torque coefficient is positive in frequency range and the gain of damping controller is smaller as far as possible to be optimized for target, carries out each additional
The decoupling of channel Subsynchronous Damping Controller parameter is adjusted, and SEDC and SSDC, which is all made of, in this example lags phase shift ring by first-order lead
The controller of section and gain link composition, transmission function are as follows:
In formula, T1For leading time constant, T2For lag time constant, KpFor gain coefficient.
For each channel damping characteristic and phase-frequency characteristic after adjusting as shown in Fig. 5~6, the comprehensive damping of system promotes effect as schemed
Shown in 4.
Embodiment two
The generator Subsynchronous Damping Controller parameter tuning method for utilizing a kind of channel proposed to decouple, based on consideration
The analytic modell analytical model of magnetic linkage variation, it is specific whole to the SEDC and SSDC progress parameter tuning in subsynchronous first master pattern system
It is fixed that steps are as follows:
Step 1, establishes the analytic modell analytical model based on subsynchronous first master pattern, and model includes that two kinds of additional channels time are same
Damping controller is walked, is appended with field excitation damp controller (SEDC, rotor-exciting channel) based on excitation system respectively and is based on
The supplementary subsynchronous damping control device (SSDC, stator generator terminal channel) of generator terminal power electronics equipment, subsynchronous multiple torque coefficient mould
Type is as follows, and wherein p is Laplace operator, Δ TeFor electromagnetic torque deviation, Δ δ is power angle deviation:
Ks(p)=Δ Te/Δδ (1)
Torque deviation model is as follows, wherein ψd0、ψq0Respectively stator d-axis and quadrature axis magnetic linkage Initial component, id0、iq0It is fixed
Sub- d-axis and quadrature axis current Initial component, ut0For stator voltage Initial component, ud0、uq0It is initial for stator d-axis and quadrature-axis voltage
Component, xd(p)、xqIt (p) is respectively d-axis and quadrature axis operational Impedance, Δ idWith Δ iqFor d-axis and quadrature axis current deviation, Δ udWith
ΔuqFor d-axis and quadrature-axis voltage deviation, G (p) is transmission function of the excitation voltage to d-axis excitation, gpid(p) for excitation AVR's
PID control transmission function,
The dq axis component buggy model of set end voltage is as follows, wherein MgFor excitation correlation conversion matrix, MdFor generator phase
Close conversion matrix, raFor stator winding resistance, xd' and xq' it is d-axis and quadrature axis transient state reactance, gse(p) attached for rotor-exciting channel
Add Excitation Damping controller transfer function:
Current deviation model is as follows, includes independent three parts: being respectively system nature channel current buggy model Δ id_0
With Δ iq_0, rotor-exciting channel current buggy model Δ id_seWith Δ iq_se, stator generator terminal channel current buggy model Δ id_ss
With Δ iq_ss.Wherein, MeFor system line correlation conversion matrix, reFor system line equivalent resistance, xeFor the equivalent sense of system line
Property reactance, xceEquivalent condensance, g are mended for system line stringssIt (p) is stator generator terminal channel supplementary subsynchronous damping control device
Transmission function:
Step 2 is based on subsynchronous analytic modell analytical model, and system nature channel is subsynchronous multiple in the subsynchronous frequency range of calculating acquisition
Torque coefficient frequency characteristic K0The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in (j λ), rotor-exciting channelseIt is (j λ), fixed
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in sub-unit terminal channelss(j λ), specific method include: by gse(p) and gss(p)
The subsynchronous multiple torque coefficient frequency characteristic K for obtaining system nature channel in target adjusting frequency range can be calculated by being set as 00(jλ)；
By gse(p) it is set as 1, gss(p) it is set as 0, and does not consider system nature channel current deviation (i.e. 7 model of formula), can be calculated
Obtain the uncompensated subsynchronous multiple torque coefficient frequency characteristic K in target adjusting frequency range internal rotor excitation channelse(jλ)；By gse(p)
It is set as 0, gss(p) it is set as 1, and does not consider system nature channel current deviation (i.e. 7 model of formula), acquisition target can be calculated
Adjust the uncompensated subsynchronous multiple torque coefficient frequency characteristic K in the default sub-unit terminal channel of frequency rangess(jλ)；
And then according to following subsynchronous multiple torque formula and phase-frequency characteristic calculation formula, the phase frequency in each channel is calculated
Characteristic Φc(λ) and damping coefficient frequency characteristic Dc(λ), as shown in Fig. 7~8；
K (j λ)=Ke(λ)+jλDe(λ),
Wherein, λ is the per unit value of frequency, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency
Rate characteristic.
Step 3, using the phase-frequency characteristic in Subsynchronous Damping Controller channel and damping coefficient frequency characteristic as foundation,
It is independently adjusted using channel phases, the setting method of damping results linear superposition, is optimized for the comprehensive damping coefficient of system
Target carries out decoupling adjusting to each additional channel Subsynchronous Damping Controller phase shift link and gain link control parameter.
For each channel damping characteristic and phase-frequency characteristic after adjusting as shown in Fig. 7~8, the comprehensive damping of system promotes effect as schemed
Shown in 9.
Claims (10)
1. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling, which is characterized in that imitative based on numerical value
True analysis or field measurement data carry out control parameter adjusting, specifically include:
Step 1, Numerical Simulation Analysis based on subsynchronous risk machine set system or by field measurement obtain target adjusting
The subsynchronous multiple torque coefficient frequency characteristic K in system nature channel in frequency range0(jλ)；
Step 2 puts into a kind of additional channel Subsynchronous Damping Controller, and controller gain parameter is only arranged, and obtains system at this time
Subsynchronous multiple torque coefficient frequency characteristic Ks(jλ)；
Step 3 is based on channel Decoupling Theory, the subsynchronous multiple torque coefficient frequency characteristic K in Subsynchronous Damping Controller channelc(j
λ) pass through Ks(j λ) and K0(j λ) subtraction calculations obtain, and then obtain the phase-frequency characteristic and damping coefficient of the controller channel
Frequency characteristic；
Step 4 is put into subsynchronous if using two kinds of additional channel Subsynchronous Damping Controllers simultaneously in exit step two
Damping controller puts into another additional channel Subsynchronous Damping Controller, obtains by above-mentioned steps two and step 3 another
The phase-frequency characteristic and damping coefficient frequency characteristic in Subsynchronous Damping Controller channel；
Step 5 is based on channel Decoupling Theory, with the phase-frequency characteristic in Subsynchronous Damping Controller channel and damping coefficient frequency
Rate characteristic is foundation, is independently adjusted using channel, the setting method of result linear superposition, comprehensive with system in target adjusting frequency range
Damping coefficient is optimized for target, carries out each additional channel Subsynchronous Damping Controller phase shift link and gain link control
The decoupling of parameter is adjusted.
2. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as described in claim 1, special
Sign is, described Step 1: the subsynchronous multiple torque coefficient frequency characteristic in two, three is indicated with following plural formula:
K (j λ)=Ke(λ)+jλDe(λ),
Wherein, λ is the per unit value of frequency, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is that damping coefficient frequency is special
Property.
3. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as described in claim 1, special
Sign is that the additional channel Subsynchronous Damping Controller in the step 2 includes: the additional excitation damping based on excitation system
Controller or the supplementary subsynchronous damping control device equipped based on generator terminal power electronics；Additional channel time in the step 4 is same
Step damping controller includes: the appended with field excitation damp controller based on excitation system and adding based on generator terminal power electronics equipment
Subsynchronous Damping Controller, the appended with field excitation damp controller abbreviation rotor-exciting channel based on excitation system are based on machine
Hold the supplementary subsynchronous damping control device abbreviation stator generator terminal channel of power electronics equipment.
4. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as claimed in claim 3, special
Sign is that the channel Decoupling Theory in the step 3 refers to, when Subsynchronous Damping Controller is using revolving speed deviation and its equivalent
Signal is inputted as controller, and system parameter and excitation automatic voltage regulator controller parameter or generator 's parameter are certain
When, system nature channel and rotor-exciting channel or stator generator terminal channel mutually decouple, the subsynchronous multiple torque coefficient in each channel
Frequency characteristic linear superposition.
5. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as claimed in claim 3, special
Sign is that the channel Decoupling Theory in the step 5 refers to, when Subsynchronous Damping Controller is using revolving speed deviation and its equivalent
Signal is inputted as controller, and generator 's parameter, system parameter and excitation automatic voltage regulator controller parameter are certain
When, system nature channel, rotor-exciting channel and stator generator terminal channel mutually decouple, the subsynchronous multiple torque coefficient frequency in each channel
The superposition of rate characteristics linearity.
6. a kind of generator Subsynchronous Damping Controller parameter tuning side of channel decoupling as described in any one in claim 1-5
Method, which is characterized in that the phase-frequency characteristic formula in the step 3 and step 4 is expressed as follows:
Wherein, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency characteristic.
7. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling, which is characterized in that based on subsynchronous
The subsynchronous analytic modell analytical model of first master pattern carries out parameter tuning, comprising:
Step 1, establishes the subsynchronous analytic modell analytical model based on subsynchronous first master pattern, and model includes two kinds of additional channels
Synchronous damping controller is the appended with field excitation damp controller based on excitation system i.e. rotor-exciting channel and based on generator terminal respectively
Supplementary subsynchronous damping control device, that is, stator generator terminal channel of power electronics equipment；Subsynchronous analytic modell analytical model is as follows:
Ks(p)=Δ Te/ Δ δ,
Wherein, p is Laplace operator, Δ TeFor electromagnetic torque deviation, Δ δ is power angle deviation；
Electromagnetic torque buggy model is as follows:
Wherein ψd0、ψq0Respectively stator d-axis and quadrature axis magnetic linkage Initial component, id0、iq0It is initial for stator d-axis and quadrature axis current
Component, ut0For stator voltage Initial component, ud0、uq0For stator d-axis and quadrature-axis voltage Initial component, xd(p)、xq(p) it is respectively
D-axis and quadrature axis operational Impedance, Δ idWith Δ iqFor d-axis and quadrature axis current deviation, Δ udWith Δ uqIt is inclined for d-axis and quadrature-axis voltage
Difference, G (p) are transmission function of the excitation voltage to d-axis excitation, gpid(p) the PID control transmission function for being excitation AVR；
The dq axis component buggy model of set end voltage is as follows:
Wherein, MgFor excitation correlation conversion matrix, MdFor generator correlation conversion matrix, raFor stator winding resistance, xd' and xq’
For d-axis and quadrature axis transient state reactance, gseIt (p) is rotor-exciting channel appended with field excitation damp controller transmission function；
Current deviation model is as follows, includes independent three parts: being respectively system nature channel current buggy model Δ id_0And Δ
iq_0, rotor-exciting channel current buggy model Δ id_seWith Δ iq_se, stator generator terminal channel current buggy model Δ id_ssAnd Δ
iq_ss；
Wherein, MeFor system line correlation conversion matrix, reFor system line equivalent resistance, xeFor the equivalent perception electricity of system line
It is anti-, xceEquivalent condensance, g are mended for system line stringss(p) it is transmitted for stator generator terminal channel supplementary subsynchronous damping control device
Function；
Step 2 is based on subsynchronous analytic modell analytical model, calculates the subsynchronous of system nature channel in acquisition target adjusting frequency range and turns again
Moment coefficient frequency characteristic K0The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in (j λ), rotor-exciting channelse(j λ), stator
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in generator terminal channelss(j λ), and then obtain the phase-frequency characteristic and resistance in each channel
Buddhist nun's torque coefficient frequency characteristic；
Step 3 is based on channel Decoupling Theory, with the phase-frequency characteristic in Subsynchronous Damping Controller channel and damping coefficient frequency
Rate characteristic is foundation, is independently adjusted using channel, the setting method of result linear superposition, comprehensive with system in target adjusting frequency range
Damping coefficient is optimized for target, carries out each additional channel Subsynchronous Damping Controller phase shift link and gain link control
The decoupling of parameter is adjusted.
8. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as claimed in claim 7, special
Sign is, described Step 1: the subsynchronous multiple torque coefficient frequency characteristic in two is indicated with following plural formula:
K (j λ)=Ke(λ)+jλDe(λ),
Wherein, λ is the per unit value of frequency, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is that damping coefficient frequency is special
Property.
9. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as claimed in claim 7, special
Sign is that the circular of the subsynchronous multiple torque coefficient frequency characteristic in each channel is as follows in the step 2:
By gse(p) and gss(p) it is set as 0, calculates the subsynchronous multiple torque system for obtaining system nature channel in target adjusting frequency range
Number frequency characteristic K0(jλ)；
By gse(p) it is set as 1, gss(p) it is set as 0, and does not consider system nature channel current deviation, calculates and obtains target adjusting
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in frequency range internal rotor excitation channelse(jλ)；
By gse(p) it is set as 0, gss(p) it is set as 1, and does not consider system nature channel current deviation, calculates and obtains target adjusting
The uncompensated subsynchronous multiple torque coefficient frequency characteristic K in the default sub-unit terminal channel of frequency rangess(jλ)。
10. a kind of generator Subsynchronous Damping Controller parameter tuning method of channel decoupling as claimed in claim 7, special
Sign is that the phase-frequency characteristic formula in the step 2 and step 3 is expressed as follows:
Wherein, Ke(λ) is synchronizing torque coefficient frequencies characteristic, De(λ) is damping coefficient frequency characteristic.
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