CN106777817A - The frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system - Google Patents
The frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system Download PDFInfo
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- CN106777817A CN106777817A CN201710038345.XA CN201710038345A CN106777817A CN 106777817 A CN106777817 A CN 106777817A CN 201710038345 A CN201710038345 A CN 201710038345A CN 106777817 A CN106777817 A CN 106777817A
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Abstract
The invention provides a kind of frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system, comprise the following steps：Step 1, builds the electric power system emulation module of urban track traffic；Step 2, builds urban railway transit train operation conditions emulation module；Step 3, builds FFT frequency analysis modules, is analyzed for the harmonic wave in the shape information that is received to the oscillograph module in the urban railway transit train operation conditions emulation module and compared.The present invention can be with the running status under the three of simcity rail transit train kinds of operating modes (traction, coasting, braking) to the harmonic effects of power network, so as to provide analysis foundation to obtain more preferable power quality.
Description
Technical field
The present invention relates to a kind of modeling method, more particularly, to a kind of urban track traffic quality of power supply simulation analysis system
Frequency analysis modeling method.
Background technology
With economic development and the quickening of process of modernization, countries in the world all suffer from same problem, i.e. urban human
The swift and violent growth of mouth, region constantly expand, and original urban ground traffic cannot meet the growing trip requirements of citizen.City
A kind of public transport preferable in track traffic exactly modern city, that citizens' activities demand can be met.City rail
Traffic electric power system is the system that power source is provided for rail transportation operation, is one in numerous urban distribution network users
Individual important user.It receives power supply from urban distribution network, by becoming distribution, is supplied to urban track traffic each suitable power supply
Individual subsystem.As urban track traffic scale constantly expands, subway contains as the first order load of urban distribution network in the system
Substantial amounts of nonlinear-load, its influence brought to power network that puts into operation more can not be ignored, especially to being produced at system points of common connection
Raw harmonic effects, urban track traffic is accessed and increasingly causes concern to the harmonic effects of power network.At present, both at home and abroad to urban rail
The research of the electric power system quality of power supply is concentrated mainly on the influence produced by dc source commutation system, and urban track traffic is in fortune
Should be divided into during row traction, coasting, braking three processes, but from train is actual put into operation after, traction, coasting, braking three
Analysis and research under the specific operating mode of kind to side harmonics is little, and this precision to subway system harmonicses is administered and brought not
Just.
The present invention mainly proposes different operation phase cities rail in urban track traffic quality of power supply simulation analysis system
Harmonic effects modeling method of the road traffic to power network.
The content of the invention
For the drawbacks described above of prior art, the invention provides a kind of urban track traffic quality of power supply simulation analysis system
The frequency analysis modeling method of system, it is characterised in that comprise the following steps：
Step 1, builds the electric power system emulation module of urban track traffic, and the electric power system emulation module includes that high pressure is female
Wire module A and high voltage bus module B, main transformer module, the main transformer module includes two 110KV/35KV transformers
Module, is respectively used to receive the high-tension electricity from high voltage bus modules A and high voltage bus module B, described two 110KV/35KV
Bus in transformer module using sectionalized single busbar connection the mode of connection, the main transformer module is by the high voltage bus module
The 110KV three-phase alternating currents of A and high voltage bus module B are by becoming the feeding traction power transformation of 35KV three-phase alternating currents after step-down treatment
Stand module, then by the step-down of traction substation module, rectifying step, obtain the direct current of analog-driven train；
Step 2, builds urban railway transit train operation conditions emulation module, and the emulation module includes：Dc source mould
Block, the DC power supplier is the traction substation module in power supply module, for defeated to train operating conditions emulation module
Send direct current；IGBT inverter modules, for simulating train inverter, the IGBT inverter modules are respectively connecting to four simultaneously
The induction conductivity module of connection, the induction conductivity module is used to simulate to terminal output mechanical energy；Also include oscillograph mould
Block, the oscillograph module is used to receive the output voltage information of IGBT inverter modules, the electric current of induction conductivity module output
Information, rotary speed information, electromagnetic torque information；Also include vector control module, one end of the vector control module with it is described
IGBT inverter modules are connected, by sent to IGBT inverter modules open, disconnected control pulse, the running status to train plays
Control action；Also include Logic control module, one end of the Logic control module is connected with vector control module, the other end connects
It is connected to the rotary speed information output end of induction conductivity module；The Logic control module receives the induction conductivity module output
Rotary speed information to obtain the information of train speed, by the train speed information for obtaining, determine the IGBT inverter modules
The disconnected pulse of switch the transmission time；
Step 3, builds FFT frequency analysis modules, and the harmonic wave for the waveform of the information received to the oscillograph enters
Row com-parison and analysis.
Further, the traction substation module carries out rectification in rectification using 24 pulse wave rectifier systems.
Further, in step 2, the urban railway transit train operation conditions emulation module is proceeded as follows：
Since 0s, by vector control module, IGBT inverter modules are opened, control traction electric machine module rotating speed reaches 3500
Rev/min, load torque is 300 Ns * meters；Train traction is to 70 kilometers/hour；The oscillograph module records IGBT inverters
The waveform characteristic information of the voltage signal of module, the current information of induction conductivity module, tach signal and electromagnetic torque signal；
When train speed reaches 70 kilometers/hour, by vector control module, IGBT inverter modules are closed, control
Traction electric machine module rotating speed drops to 2500 revs/min, voltage signal, the sensing of oscillograph module record IGBT inverter modules
The waveform characteristic information of the current information, tach signal and electromagnetic torque signal of motor module；
When traction electric machine module rotating speed drops to 2500 revs/min, i.e., when train speed reaches 50 kilometers/hour, logic
Control module control IGBT inverter modules are opened, and load torque is -300 Ns * meters, oscillograph module record IGBT inverter moulds
The waveform characteristic information of the voltage signal of block, the current information of induction conductivity module, tach signal and electromagnetic torque signal.
Further, the FFT frequency analyses module, compares for being analyzed to harmonic wave, so as to obtain train each
Situation is invaded and harassed to the harmonic wave at system points of common connection from electric power supply system for subway under individual operating condition, including：Analysis system is public
Harmonic current value and harmonic voltage containing rate at tie point；Analysis voltage irregularity of wave form and current waveform aberration rate；Point
The corresponding voltage containing ratio harmonic current value of analysis each harmonic.
Patent of the present invention can carry out simulation analysis to the urban track traffic quality of power supply, so as to the adjustment to electric current is obtained
Intuitively analyze.
Brief description of the drawings
Fig. 1 is power supply of city railway system module analogous diagram of the invention；
Fig. 2 is the module map that three kinds of operation conditions of municipal rail train of the invention are emulated；
Fig. 3 is that the running status under three kinds of operating modes is tracked after municipal rail train of the invention accesses power supply of city railway system
Simulation result schematic diagram afterwards.
Specific embodiment
The frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system of the invention is included to urban rail
The power supply model of electric power system is modeled and the operation conditions of train is modeled and test result is modeled.
Fig. 1 is the electric power system emulation module of power supply of city railway system, including high voltage bus modules A and high voltage bus module B,
Main transformer module, main transformer module includes two 110KV/35KV transformer modules, is respectively used to receive female from high pressure
The high voltage power supply of wire module A and high voltage bus module B.Main transformer module is used from different high voltage bus modules and introduces supply lines
The mode of the double circuit power supply on road, the bus in two 110KV/35KV transformer modules is then using the wiring side of sectionalized single busbar connection
Formula, which enhances the reliability of power supply.Main transformer module is by the 110KV three-phase alternating currents of the power supply module of power supply of city railway system
Electricity sends into traction substation module by becoming 35KV three-phase alternating currents after step-down treatment, then by traction substation module
The steps such as step-down, rectification, obtain driving the direct current of train.
In rectification, it is 24 to employ the pulse number of output in 24 pulse wave rectifier systems, i.e. a cycle, the purpose is to subtract
The ripple factor of small DC voltage simultaneously reduces the appearance of low-order harmonic, so as to effectively reduce shadow of the harmonic source to urban distribution network
Ring.
During train operation, traction, three kinds of operating conditions of coasting and braking are divided into.During traction, train passes through
From overhead transmission line and in accordance with city rail traction voltage DC voltage is conveyed to traction positioned at the pantograph of roof inverse
Become device, so as to obtain the three-phase alternating current for driving alternating current generator.Four asynchronous motors inside train are then by parallel connection
Operation, by the AC conversion from Converting Unit into the mechanical energy for locomotive operation, and by the steering positioned at marshaling
Frame provides steering force for its four axles, and then drives whole train groups to be quickly accomplished distraction procedure.
After train completes traction, the traction invertor of train is closed by switching control, train enters coasting state.Due to
Inverter is turned off, and the motor of train does not apply power supply, does not have the supply of energy, therefore whole coasting process does not have the consumption of power,
The effect that train only relies on inertia moves on.
During braking, inverter is opened, and motor torque reversely, into Generator Status, the three-phase alternating current of generation is passed through
Inverter is changed into direct current energy.
Based on principles above, Fig. 2 constructs three kinds of emulation modules of operation conditions of subway train of the present invention.
The emulation module includes DC power supplier, and the DC power supplier is the traction power transformation in emulation power supply module
Stand module, it conveys direct current to train emulation module, IGBT inverter modules are used to simulate train inverter, and the IGBT is inverse
Become device module and be respectively connecting to four induction conductivity modules of parallel connection, it is defeated to terminal that the induction conductivity module is used for simulation
Go out mechanical energy.Also include oscillograph module, the oscillograph module is used to receive the output voltage information of IGBT inverter modules, sense
Current information, rotary speed information, the electromagnetic torque information of induction motor module output.
Also include vector control module, induction machine module as train driving force source, and motor be essentially it is non-
Linearly, multivariable, close coupling, parameter time varying, the complex object of big interference, electricity can be preferably realized by vector control module
Effective control of machine.Output end one end of the vector control module is connected with IGBT inverter modules, one end and logic control mould
Block is connected.Vector control module is opened by the transmission of IGBT inverter modules, disconnected control pulse, and the running status to train is played
Control action.One end of logic control system is connected the other end with IGBT inverter modules and is connected to turning for induction conductivity module
Fast information output.The rotary speed information output end is also connected to oscillograph module simultaneously.
Logic control module receives the rotary speed information of induction conductivity module output to obtain the information of train speed,
By the train speed information for obtaining, the transmission time of the disconnected pulse of switch of inverter module is determined, comprised the following steps that：
First stage is distraction procedure, since 0s, by vector control module, IGBT inverter modules is opened, control
Traction electric machine rotating speed processed reaches 3500 revs/min, and load torque is 300 Ns * meters；Train traction is to 70 kilometers/hour；Now record
Ripple device module records voltage signal, the current information of induction conductivity module, tach signal and the electromagnetism of IGBT inverter modules
The waveform characteristic information of dtc signal；
Second stage is coasting process, when train speed reaches 70 kilometers/hour, by vector control module, by IGBT
Inverter module is closed, and control traction electric machine module rotating speed drops to 2500 revs/min.Now oscillograph module record IGBT is inverse
Become the waveform characteristic of voltage signal, the current information of induction conductivity module, tach signal and the electromagnetic torque signal of device module
Information；
Phase III is braking procedure, when traction electric machine module rotating speed drops to 2500 revs/min, i.e., when train speed reaches
To 50 kilometers/hour, Logic control module control IGBT inverter modules are opened, and load torque is -300 Ns * meters.Now record ripple
Voltage signal, the current information of induction conductivity module, tach signal and the electromagnetism that device module records IGBT inverter modules turn
The waveform characteristic information of square signal；
This completes the tracking of the running status to train under three kinds of operating modes (traction, coasting, braking), oscillograph note
The simulation result of record is as shown in Figure 3.
Motor torque (electromagnetic torque Te) and rotating speed (N) are as can be seen that over time from Fig. 3
(time) advance, the start and stop of motor once successively have passed through distraction procedure, coasting process and braking procedure.Train enters first
What is entered is traction working condition, in the presence of the tractive force that asynchronous motor is provided, rotor driven progressively raising speed until maximum speed,
Now, train has also accordingly reached the F-Zero of traveling, about 60~80 kilometers/hour；Then the traction invertor of train is closed
Close, into coasting operating mode, train moves ahead by inertia, be only subject to acting on for the resistance from air and ground, speed gradually under
Drop, when rotating speed drops to setting value, reopens the inverter of train；Finally, train enters damped condition, now electricity
Machine makees generator operation, in braking procedure, speed suddon drawdown, until train speed is reduced to zero.
Also include FFT frequency analysis modules, compare for being analyzed to harmonic wave, train can be obtained in each operation work
Under condition situation is invaded and harassed from electric power supply system for subway to the harmonic wave at system points of common connection.
Including harmonic current value and harmonic voltage containing rate at analysis system points of common connection：It can be found that system is public
The harmonic current value and harmonic voltage containing rate at tie point are all that numerical value is maximum at the 23rd time, the 25th subharmonic altogether,
47th time, numerical value is larger at the 49th subharmonic, the result matches with the mode of 24 pulse wave rectifiers, therefore can draw in 24 pulse waves
Under rectifier system, the harmonics value at system points of common connection is larger, rather than harmonic value at harmonics is less
Conclusion.
Analysis voltage irregularity of wave form and current waveform aberration rate：From three kinds of angle analysis of operating condition, traction working condition
Lower voltage-form distortion rate and current waveform aberration rate are relatively large, and the respective value of braking procedure is taken second place, produced by coasting process
Percent harmonic distortion is minimum.
The corresponding voltage containing ratio harmonic current value of analysis each harmonic：The corresponding voltage of each harmonic under traction working condition
Containing ratio harmonic current value is maximum, and the respective value of braking procedure is taken second place, and coasting process value is minimum.
Although be described in detail to the present invention in conjunction with the embodiments, it should be understood by those skilled in the art that
Ground is that the various amendments, deformation under without departing substantially from spirit of the invention and essence are all allowed, and they both fall within right of the present invention
It is required that protection domain among.
Claims (4)
1. a kind of frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system, it is characterised in that comprising such as
Lower step：
Step 1, builds the electric power system emulation module of urban track traffic, and the electric power system emulation module includes high voltage bus mould
Block A and high voltage bus module B, main transformer module, the main transformer module includes two 110KV/35KV transformer modules,
It is respectively used to receive the high-tension electricity from high voltage bus modules A and high voltage bus module B, described two 110KV/35KV transformers
Bus in module using sectionalized single busbar connection the mode of connection, the main transformer module is by the high voltage bus modules A and height
The 110KV three-phase alternating currents of pressure busbar modules B are by becoming 35KV three-phase alternating currents feeding traction substation mould after step-down treatment
Block, then by the step-down of traction substation module, rectifying step, obtains the direct current of analog-driven train；
Step 2, builds urban railway transit train operation conditions emulation module, and the emulation module includes：DC power supplier, should
DC power supplier is the traction substation module in power supply module, for conveying direct current to train operating conditions emulation module
Electricity；IGBT inverter modules, for simulating train inverter, the IGBT inverter modules are respectively connecting to four senses of parallel connection
Induction motor module, the induction conductivity module is used to simulate to terminal output mechanical energy；Also include oscillograph module, the record
Ripple device module is used to receive the output voltage information of IGBT inverter modules, the current information of induction conductivity module output, turns
Fast information, electromagnetic torque information；Also include vector control module, one end of the vector control module and the IGBT inverters
Module is connected, by sent to IGBT inverter modules open, disconnected control pulse, the running status to train plays control action；
Also include Logic control module, one end of the Logic control module is connected with vector control module, and the other end is connected to sensing
The rotary speed information output end of motor module；The Logic control module receives the rotating speed letter of the induction conductivity module output
Cease to obtain the information of train speed, by the train speed information for obtaining, determine that the switch of the IGBT inverter modules breaks
The transmission time of pulse；
Step 3, builds FFT frequency analysis modules, and the harmonic wave for the waveform of the information received to the oscillograph is divided
Analysis is compared.
2. the frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system according to claim 1, its
It is characterised by, the traction substation module carries out rectification in rectification using 24 pulse wave rectifier systems.
3. the frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system according to claim 2, its
It is characterised by, in step 2, the urban railway transit train operation conditions emulation module is proceeded as follows：Since 0s,
By vector control module, IGBT inverter modules are opened, control traction electric machine module rotating speed reaches 3500 revs/min, bears
Set torque is 300 Ns * meters；Train traction is to 70 kilometers/hour；The oscillograph module records the voltage of IGBT inverter modules
The waveform characteristic information of signal, the current information of induction conductivity module, tach signal and electromagnetic torque signal；
When train speed reaches 70 kilometers/hour, by vector control module, IGBT inverter modules are closed, control traction
Motor module rotating speed drops to 2500 revs/min, and oscillograph module records voltage signal, the induction electric of IGBT inverter modules
The waveform characteristic information of the current information, tach signal and electromagnetic torque signal of machine module；
When traction electric machine module rotating speed drops to 2500 revs/min, i.e., when train speed reaches 50 kilometers/hour, logic control
Module control IGBT inverter modules are opened, and load torque is -300 Ns * meters, oscillograph module record IGBT inverter modules
The waveform characteristic information of voltage signal, the current information of induction conductivity module, tach signal and electromagnetic torque signal.
4. the frequency analysis modeling method of urban track traffic quality of power supply simulation analysis system according to claim 3,
Characterized in that, the FFT frequency analyses module, compares for being analyzed to harmonic wave, run at each so as to obtain train
Situation is invaded and harassed to the harmonic wave at system points of common connection from electric power supply system for subway under operating mode, including：Analysis system points of common connection
The harmonic current value and harmonic voltage containing rate at place；Analysis voltage irregularity of wave form and current waveform aberration rate；Each time of analysis
The corresponding voltage containing ratio harmonic current value of harmonic wave.
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Cited By (4)
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| CN108279350A (en) * | 2018-04-16 | 2018-07-13 | 北京千驷驭电气有限公司 | Urban track traffic traction power supply dynamic model emulation test system |
| WO2019200514A1 (en) * | 2018-04-16 | 2019-10-24 | 北京千驷驭电气有限公司 | Urban rail transit traction power supply dynamic model simulation test system |
| CN113486541A (en) * | 2021-09-08 | 2021-10-08 | 中铁电气化勘测设计研究院有限公司 | Simulation method of urban rail direct-current power supply system based on train safety distance and voltage |
| CN114325021A (en) * | 2021-12-29 | 2022-04-12 | 国网上海市电力公司 | Electricity charge calculation method considering harmonic characteristics of high-speed rail |
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| CN114325021A (en) * | 2021-12-29 | 2022-04-12 | 国网上海市电力公司 | Electricity charge calculation method considering harmonic characteristics of high-speed rail |
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