CN204028910U - The modeler model of the large turbo-type generator of static excitation - Google Patents
The modeler model of the large turbo-type generator of static excitation Download PDFInfo
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- CN204028910U CN204028910U CN201420417561.7U CN201420417561U CN204028910U CN 204028910 U CN204028910 U CN 204028910U CN 201420417561 U CN201420417561 U CN 201420417561U CN 204028910 U CN204028910 U CN 204028910U
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- 230000005284 excitation Effects 0.000 title claims abstract description 46
- 230000003068 static effect Effects 0.000 title claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052802 copper Inorganic materials 0.000 claims abstract description 31
- 239000010949 copper Substances 0.000 claims abstract description 31
- 230000007935 neutral effect Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 13
- 238000004458 analytical method Methods 0.000 abstract description 6
- 238000011160 research Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005094 computer simulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model discloses a kind of modeler model of large turbo-type generator of static excitation, comprise the static excitation subsystem model considering neutral point ground capacitance realized by modeling method, consider inputoutput pair end impact and with the field copper subsystem model of the field copper loss of frequency dependence and the rotor axial system subsystem model considering armature spindle ground capacitance and turbine shafting impedance, the input end of the output terminal access field copper subsystem model of described static excitation subsystem model, the input end of the output terminal access rotor axial system subsystem model of described field copper subsystem model.The utility model is by building generator static excitation subsystem model and setting up the subsystem model of field copper and rotor axial system, the shaft voltage waveform that generator is produced by static excitation system can be obtained with emulating, be convenient to carry out simulation analysis and research to the control of shaft voltage, the utility model have model structure simple, be easy to the advantage that realizes, degree of accuracy is high.
Description
Technical field
The utility model relates to a kind of modeler model of large turbo-type generator of static excitation, belongs to turbodynamo technical field.
Background technology
Turbodynamo, as one of the nucleus equipment of electrical energy production, is responsible for very important task in electric system.The fault of generator and stoppage in transit, not only can damage expensive motor body, and will directly threaten safety and the reliable power supply of electric system.Along with the increase of genset single-machine capacity, cause bearing shell damage accident should cause enough attention by shaft voltage problem.If do not keep a close eye on it and take safeguard procedures; shaft voltage is enough to the oil film that punctures between axle and bearing and discharges; cause motor component damage, acceleration mechanical wearing and tearing, bearing shell time serious, also can be caused to burn out and by forced-stopping machine, cause unnecessary maintenance and power generation loss.
In recent years, along with the fast development of Power Electronic Technique, static excitation system is used widely in large turbo-type generator, cause a kind of newly, frequency is higher, the shaft voltage source that amplitude is larger.Alternating voltage is exported dc voltage operation by thyristor rectifier by static excitation system, therefore inevitable have flutter component in the output of excitation system, and between rotor windings and macro-axis, there is coupling capacitance, in operation, macro-axis can produce ac coupling capacitor voltage because of electromagnetic induction phenomenon.The shaft voltage amplitude that static excitation system causes is very high and have high-frequency fluctuation, is the high fdrequency component place in whole shaft voltage, and waveform has complicated harmonic pulse component, at its peak pulse of light hours than much higher during heavy load, needs key protection.
MATLAB is a kind of software platform integrating mathematical computations, analysis, visual, algorithm development and issue etc., comprises two large divisions: mathematical computations and Engineering Simulation.In Engineering Simulation SIMULINK environment, use SimPowerSystems storehouse, electric system simulation tool box, carry out electric power, electronic system modeling and simulation has a wide range of applications in electric system.SimPowerSystems is primarily of these seven module librarys compositions of application word bank, power supply word bank, element word bank, additional word bank, motor word bank, measurement word bank and power electronics word bank, assembled package can also go out more complicated module as required simultaneously, various Digital Simulation modeling can be carried out easily thus to studied object, understand the impact of electric parameter change on Power System Analysis, operation, proof theory analysis result.
Utility model content
The purpose of this utility model is the modeler model of the large turbo-type generator providing a kind of static excitation, carries out simulation modeling to the shaft voltage that static excitation system causes, and is convenient to carry out simulation analysis and research to the control of shaft voltage.
The technical scheme that the utility model adopts is: the modeler model of the large turbo-type generator of static excitation, comprise the static excitation subsystem model considering neutral point ground capacitance realized by modeling method, consider inputoutput pair end impact and with the field copper subsystem model of the field copper loss of frequency dependence and the rotor axial system subsystem model considering armature spindle ground capacitance and turbine shafting impedance, the input end of the output terminal access field copper subsystem model of described static excitation subsystem model, the input end of the output terminal access rotor axial system subsystem model of described field copper subsystem model.
Described static excitation subsystem model comprises: three-phase alternating current source model: for providing three-phase alternating voltage signal; Three-phase transformer model: for regulation output voltage magnitude; The former limit of described three-phase transformer model adopts triangle to connect, and secondary adopts Y-connection; Three-phase full-controlled bridge model: the alternating voltage transformation exported by three-phase transformer model changes six pulsed dc voltages into; Synchronous six generator models: for sending pulse triggering signal, control six thyristors triggering three-phase full-controlled bridge model; Oscillograph one model: for observing common mode voltage U
c; Capacitor model C
w: for simulating neutral point ground capacitance.
Described field copper subsystem model comprises: the first coil former: for simulating first coil of generator excitation winding; Last coil former: for simulating last coil of generator excitation winding; Intermediate coil model: for simulating the intermediate coil of generator excitation winding; Passive RL loop model RL
c1, RL
c2: for the field copper loss that analog equivalent is relevant with frequency, RL
c1, RL
c2by the resistance be connected in parallel and inductance composition; Described first coil former, intermediate coil model and last coil former are connected in series; RL
c1, RL
c2be connected on respectively on the input end of intermediate coil model, output terminal.
Described rotor axial system subsystem model comprises: for simulating the inductor models L of steam turbine high-pressure cylinder
hpt; For simulating the inductor models L of Steam Turbine Through IP Admission
mpt; Be respectively used to the inductor models L simulating steam turbine two low pressure (LP) cylinders
lpt0, inductor models L
lpt; For simulating the impedance model R of generator ground brush
brush; For simulating passive RL loop model RLi1, RLi2 of the impedance of electricity generator stator core inner rotor shaft and frequency dependence; For the capacitor model of model rotor axle ground capacitance; For oscillograph two model of output display shaft voltage.
The beneficial effect that the utility model reaches is: by building generator static excitation subsystem model and setting up the subsystem model of field copper and rotor axial system, the shaft voltage waveform that generator is produced by static excitation system can be obtained with emulating, be convenient to carry out simulation analysis and research to the control of shaft voltage, the utility model have model structure simple, be easy to the advantage that realizes, degree of accuracy is high.
Accompanying drawing explanation
Fig. 1 is the utility model modeling structure block diagram.
Fig. 2 is steam turbine generator system structural drawing.
Fig. 3 is common mode voltage and shaft voltage equivalent circuit diagram.
Fig. 4 is static excitation subsystem model figure.
Fig. 5 is field copper subsystem model figure.
Fig. 6 is rotor axial system subsystem model figure.
Fig. 7 is MATLAB/Power System modeling structure figure of the present utility model.
Fig. 8 is MATLAB/Power System simulation result figure of the present utility model.
Fig. 9 is the pi-network of the first coil former and last coil former.
Figure 10 is the pi-network of intermediate coil model.
In figure: 1, steam turbine; 1a, high pressure cylinder; 1b, intermediate pressure cylinder; 1c, low pressure (LP) cylinder; 2, generator; 2a, armature spindle; 2b, casing; 2c, field copper; 2d, stator; 2e, rotor core; 3, rectification excitation system; 3a, three-phase full-controlled bridge; 3b, three-phase transformer; 4, oscillograph one model; 5, oscillograph two model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection domain of the present utility model with this.
As shown in Figure 2, steam turbine generator system comprises steam turbine 1, generator 2 and rectification excitation system 3, and steam turbine 1 comprises a high pressure cylinder 1a, an intermediate pressure cylinder 1b and two low pressure (LP) cylinder 1c; The stator 2d that generator 2 comprises casing 2b, armature spindle 2a, rotor core 2e, field copper 2c and is made up of stator core and stator winding; Rectification excitation system 3 adopts three-phase thyristor bridge rectification excitation system, the three-phase full-controlled bridge 3a comprising three-phase transformer 3b and be made up of six thyristors, adopt three-phase thyristor bridge rectification that three-phase alternating voltage is transformed to six pulsed dc voltages, by enable synchronous six pulse producers of the negative edge of step signal, adopt Two-pulse triggering, initial phase angle 30 °, in power frequency period, six thyristor impulse phases differ 60 ° successively.In figure, C
tfor field copper is to rotor core electric capacity, C
wfor neutral point ground capacitance, C
sfor armature spindle ground capacitance, U
1and U
2be respectively the voltage of rectification output end positive pole A neutral point C relative to negative pole B, then direct current exports field voltage is U
d=U
1-U
2, common mode voltage is U
c=(U
1+ U
2)/2.The typical waveform of common mode voltage is the voltage jump square wave of three times of fundamental frequencies, in the symmetric case, only has common mode voltage U
caffect shaft voltage U
s, its equivalent electrical circuit such as Fig. 3 shows.Common mode voltage U
cbe equivalent to a voltage source, by three electric capacity C
t, C
w, C
sform a closed-loop path, shaft voltage is armature spindle ground capacitance C
son dividing potential drop, can obtain
As shown in Figure 1, be the utility model modeling structure block diagram, comprise static excitation subsystem model, field copper subsystem model and rotor axial system subsystem model.As shown in Figure 7, be MATLAB/Power System modeling structure figure, the input end of the output terminal access field copper subsystem model of static excitation subsystem model, the input end of the output terminal access rotor axial system subsystem model of field copper subsystem model.Powergui, Clock, workspace1 and workspace are control required in SimPowerSystems emulation, and powergui is electric system simulation module, for electric power system data analytical calculation; Clock is clock module, for providing and show the function of simulation time; Workspace1 and workspace is then respectively used to holding time variable and shaft voltage variable.
As shown in Figure 4, be static excitation subsystem model figure, comprise: three-phase alternating current source model: for simulating three-phase alternating-current supply, three-phase alternating voltage signal is provided; Three-phase transformer model: for simulating three-phase transformer 3b, for regulation output voltage magnitude, three-phase transformer model adapts with three-phase transformer 3b: former limit adopts triangle to be connected, secondary adopts Y-connection; Three-phase full-controlled bridge model: for simulating three-phase full-controlled bridge 3a, the alternating voltage transformation exported by three-phase transformer model changes six pulsed dc voltages into; Synchronous six generator models: for simulating synchronous six pulse producers, send pulse triggering signal, control six thyristors triggering three-phase full-controlled bridge model; Oscillograph one model 4: for observing common mode voltage U
c.Consider neutral point ground capacitance, static excitation subsystem model is also provided with the capacitor model C for simulating neutral point ground capacitance
w.
As shown in Figure 5, be field copper subsystem model figure, the first coil former, intermediate coil model and last coil former are connected in series.Consider the impact of inputoutput pair end, separately to first coil and last coil modeling of field copper.First coil former: for simulating first coil of generator excitation winding; Last coil former: for simulating last coil of generator excitation winding.First coil former is identical with last coil former syndeton, wherein C
t0=C
t1=C
t2=...=C
t26=C
t27, L
t0=L
t1=L
t2=...=L
t26=L
t27, the first coil former and last coil former are composed in series by some groups of pi-networks as shown in Figure 9, and this pi-network is by inductance L
t0with electric capacity C
t0, electric capacity C
t1' composition.Each group pi-network analog equivalent one circle field copper is graphic simplicity, in Figure 5 by two electric capacity C in parallel
txbe equivalent to 2C
tx, wherein x=0,1,2 ... 26,27.Intermediate coil model: for simulating the intermediate coil of generator excitation winding, intermediate coil model pi-network is as shown in Figure 10 composed in series, each group pi-network analog equivalent half turn field copper.Wherein C
c=C
c1=C
c2=...=C
c22=C
c23, L
c=L
c1=L
c2=...=L
c22=L
c23, identical, be graphic simplicity in Figure 5, by two electric capacity in parallel
be equivalent to a C
cy, wherein y=1,2 ... 22,23.Consider within the scope of certain frequency, with the field copper loss of frequency dependence, adopt passive RL loop model to carry out analog equivalent.Passive RL loop is made up of the resistance be connected in parallel and inductance.The input end series passive RL loop model RL of intermediate coil model
c1, output terminal series passive RL loop model RL
c2.In figure, R
c0and R
c1all for the resistance of analog equivalent field copper.
As shown in Figure 6, be rotor axial system subsystem model figure.In steam turbine part, the inductance between armature spindle and cylinder determines the impedance of axle system, considers turbine shafting impedance, carrys out analog equivalent respectively: inductor models L to low pressure (LP) cylinder, intermediate pressure cylinder, a high pressure cylinder corresponding inductance
hptfor simulating steam turbine high-pressure cylinder, inductor models L
mptfor simulating Steam Turbine Through IP Admission, inductor models L
lpt0, inductor models L
lptbe respectively used to simulation steam turbine two low pressure (LP) cylinders, C
oil1for analog equivalent steam turbine cylinder pressure side armature spindle ground capacitance, C
oil2and C
oil3be respectively used to the ground capacitance of simulation two low pressure (LP) cylinders, C
oil4for simulating ground capacitance, the C of intermediate pressure cylinder
oil5for the ground capacitance of simulated high-pressure cylinder.C
oilfor simulating excitation side armature spindle ground capacitance, impedance model R
brushfor simulating generator ground brush, C
insfor the ground capacitance of analogue ground brush, armature spindle ground capacitance C
s=C
oil+ C
ins.For high frequency shaft voltage, because armature spindle impedance is comparatively large, generator one end dress ground brush is on the not too many impact of the other end.Passive RL loop model RLi1, RLi2 are for simulating the impedance of electricity generator stator core inner rotor shaft and frequency dependence.R
i0for the impedance of analog equivalent generator rotor shaft, oscillograph two model 5 is for output display shaft voltage U
s.
As shown in Figure 8, be after being emulated by MATLAB/Power System, the shaft voltage Us oscillogram simulation result figure of oscillograph two model 5 output display.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection domain of the present utility model.
Claims (4)
1. the modeler model of the large turbo-type generator of static excitation, it is characterized in that, comprise the static excitation subsystem model considering neutral point ground capacitance realized by modeling method, consider inputoutput pair end impact and with the field copper subsystem model of the field copper loss of frequency dependence and the rotor axial system subsystem model considering armature spindle ground capacitance and turbine shafting impedance, the input end of the output terminal access field copper subsystem model of described static excitation subsystem model, the input end of the output terminal access rotor axial system subsystem model of described field copper subsystem model.
2. the modeler model of the large turbo-type generator of static excitation according to claim 1, is characterized in that, described static excitation subsystem model comprises:
Three-phase alternating current source model: for providing three-phase alternating voltage signal;
Three-phase transformer model: for regulation output voltage magnitude; The former limit of described three-phase transformer model adopts triangle to connect, and secondary adopts Y-connection;
Three-phase full-controlled bridge model: the alternating voltage transformation exported by three-phase transformer model changes six pulsed dc voltages into;
Synchronous six generator models: for sending pulse triggering signal, control six thyristors triggering three-phase full-controlled bridge model;
Oscillograph one model: for observing common mode voltage U
c;
Capacitor model C
w: for simulating neutral point ground capacitance.
3. the modeler model of the large turbo-type generator of static excitation according to claim 2, is characterized in that, described field copper subsystem model comprises:
First coil former: for simulating first coil of generator excitation winding;
Last coil former: for simulating last coil of generator excitation winding;
Intermediate coil model: for simulating the intermediate coil of generator excitation winding;
Passive RL loop model RL
c1, RL
c2: for the field copper loss that analog equivalent is relevant with frequency, RL
c1, RL
c2by the resistance be connected in parallel and inductance composition;
Described first coil former, intermediate coil model and last coil former are connected in series;
RL
c1, RL
c2be connected on respectively on the input end of intermediate coil model, output terminal.
4. the modeler model of the large turbo-type generator of static excitation according to claim 3, is characterized in that, described rotor axial system subsystem model comprises:
For simulating the inductor models L of steam turbine high-pressure cylinder
hpt;
For simulating the inductor models L of Steam Turbine Through IP Admission
mpt;
Be respectively used to the inductor models L simulating steam turbine two low pressure (LP) cylinders
lpt0, inductor models L
lpt;
For simulating the impedance model R of generator ground brush
brush;
For simulating passive RL loop model RLi1, RLi2 of the impedance of electricity generator stator core inner rotor shaft and frequency dependence;
For the capacitor model of model rotor axle ground capacitance;
For oscillograph two model of output display shaft voltage.
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| CN201420417561.7U CN204028910U (en) | 2014-07-25 | 2014-07-25 | The modeler model of the large turbo-type generator of static excitation |
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| CN201420417561.7U CN204028910U (en) | 2014-07-25 | 2014-07-25 | The modeler model of the large turbo-type generator of static excitation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156513A (en) * | 2014-07-25 | 2014-11-19 | 国家电网公司 | Model for modeling large steam turbine generator with function of static excitation |
| CN105005639A (en) * | 2015-06-18 | 2015-10-28 | 河海大学 | MATLAB model capable of simulating actual characteristics of thyristor and construction method |
| CN108490379A (en) * | 2018-05-18 | 2018-09-04 | 云南电网有限责任公司电力科学研究院 | A kind of transformer winding wave process method of calibration based on self-oscillation wave |
| CN108957317A (en) * | 2018-06-06 | 2018-12-07 | 广东核电合营有限公司 | Detection method, device, computer and the storage medium of pressurized-water reactor nuclear power plant generating set bearing shell |
-
2014
- 2014-07-25 CN CN201420417561.7U patent/CN204028910U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156513A (en) * | 2014-07-25 | 2014-11-19 | 国家电网公司 | Model for modeling large steam turbine generator with function of static excitation |
| CN105005639A (en) * | 2015-06-18 | 2015-10-28 | 河海大学 | MATLAB model capable of simulating actual characteristics of thyristor and construction method |
| CN105005639B (en) * | 2015-06-18 | 2018-01-02 | 河海大学 | The MATLAB models and construction method of IGCT actual characteristic can be emulated |
| CN108490379A (en) * | 2018-05-18 | 2018-09-04 | 云南电网有限责任公司电力科学研究院 | A kind of transformer winding wave process method of calibration based on self-oscillation wave |
| CN108490379B (en) * | 2018-05-18 | 2020-04-10 | 云南电网有限责任公司电力科学研究院 | Self-excited oscillation wave-based transformer winding wave process calibration method |
| CN108957317A (en) * | 2018-06-06 | 2018-12-07 | 广东核电合营有限公司 | Detection method, device, computer and the storage medium of pressurized-water reactor nuclear power plant generating set bearing shell |
| CN108957317B (en) * | 2018-06-06 | 2021-01-26 | 广东核电合营有限公司 | Method and device for detecting bearing bush of generator set of pressurized water reactor nuclear power station, computer and storage medium |
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|---|---|---|---|
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| GR01 | Patent grant |