CN113239601B - Method and device for extracting transient steady-state parameters of phase modulator in real time - Google Patents
Method and device for extracting transient steady-state parameters of phase modulator in real time Download PDFInfo
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Abstract
The invention discloses a method and a device for extracting transient and steady state parameters of a phase modulator in real time, which comprise the following steps: s1: modeling an electromagnetic finite element of a synchronous phase modulator; s2: establishing a phase modulator electromagnetic simulation model containing excitation control, and extracting current data when a fault occurs; s3: introducing current data into a road part in a field road coupling finite element model to obtain a first solution model, carrying out nonlinear time domain electromagnetic field simulation under a certain operating voltage, solving the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and locking and leading out the magnetic permeability distribution; s4: introducing the magnetic permeability distribution of the synchronous phase modulator into a second solving model, carrying out linear electromagnetic field simulation in a frozen magnetic permeability state, and linearly solving a stator flux linkage; s5: and solving the 2D finite element model based on the stator flux linkage, and calculating to obtain the transient and steady state parameters of the phase modulator. By considering the influence of different power grid voltage faults on the distribution of the magnetic fields of the stator and the rotor, more accurate transient and steady state parameters of the synchronous phase modulator are obtained.
Description
Technical Field
The invention belongs to the technical field of synchronous phase modulator parameter calculation, and particularly relates to a method and a device for extracting transient and steady state parameters of a phase modulator in real time.
Background
Compared with reactive power compensation devices such as SVC/SVG and the like, the high-capacity phase modulator has higher reliability and stronger transient capability, can remarkably improve direct-current commutation failure and inhibit system transient overvoltage, and is therefore important in direct-current transmission systems. The transient reactive capability and the supporting capability for the voltage stabilization of the phase modulator depend directly on its transient parameters. Whether transient state parameters of the phase modulator can be accurately calculated in real time is a key for accurately evaluating transient state reactive power of the phase modulator. However, in the design and simulation of the motor at present, the influence of different grid voltage faults on the magnetic field distribution of the stator and the rotor is not taken into consideration, the transient stable state parameters under different operation conditions are considered to be a fixed value, in fact, different grid voltage faults can influence the transient stable state parameter values, loss and heating change are caused by serious saturation of a magnetic circuit when the faults occur, and the transient stable state parameter calculation is inevitably inaccurate due to the fact that the influence of the grid voltage faults is ignored.
Therefore, in order to obtain accurate transient and steady state parameters of the phase modulator, evaluate the transient and reactive capability of the phase modulator and analyze the voltage safety performance of a system, a method and a device for extracting the transient and steady state parameters of the phase modulator in real time, which are suitable for power grid voltage faults, are urgently needed.
Disclosure of Invention
The invention provides a method and a device for extracting transient and steady state parameters of a phase modulator in real time, which are used for solving at least one of the technical problems.
In a first aspect, the invention provides a phase modulator transient and steady state parameter real-time extraction method, which comprises the following steps: s1: modeling an electromagnetic finite element of a synchronous phase modulator, wherein the finite element modeling comprises establishing a 2D field path coupling finite element model; s2: establishing a phase modulator electromagnetic simulation model containing excitation control, and extracting current data when a fault occurs, wherein the current data comprises phase modulator terminal currents when different power grid voltages have faults and excitation currents caused by different excitation control; s3: leading the phase modulator terminal current and the exciting current into a 'way' part in a field-way coupling finite element model to obtain a first solving model, carrying out nonlinear time domain electromagnetic field simulation under a certain operating voltage, solving the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and locking and leading out the magnetic permeability distribution; s4: and (2) introducing the magnetic permeability distribution of the synchronous phase modulator into a second solving model, performing linear electromagnetic field simulation in a frozen magnetic permeability state, and linearly solving the stator flux linkage, wherein because the derived magnetic permeability already comprises the magnetic field distribution of the phase modulator at a certain operating voltage, new excitation does not need to be added to the part of the second solving model on a 'way', and the magnetic field excitation loading mode of the second solving model is as follows:
，
in the formula (I), wherein,
stator phase A current, stator phase B current and stator phase C current,
in order to be the peak value of the current,
in order to be the electrical angular frequency of the antenna,
is the initial phase angle of the stator phase A,
is an exciting current; the expression of the stator flux linkage calculation is as follows:
in the formula (I), wherein,
is the current density within one turn and,
in the form of a vector magnetic bit,
is the volume of the region or regions,
in order to have the number of turns,lis a closed loop; s5: and solving the 2D finite element model based on the stator flux linkage, and calculating to obtain the transient and steady state parameters of the phase modulator.
In a second aspect, the present invention provides a phase modulator transient and steady state parameter real-time extraction apparatus, including: the modeling module is configured to model electromagnetic finite elements of the synchronous phase modulator, wherein the finite element modeling comprises establishing a 2D field path coupling finite element model; the extraction module is configured to establish a phase modulator electromagnetic simulation model containing excitation control and extract current data when a fault occurs, wherein the current data comprises phase modulator terminal currents when different power grid voltage faults occur and excitation currents caused by different excitation control; the simulation module is configured to introduce phase modulator terminal current and excitation current into a 'way' part in the field-way coupling finite element model to obtain a first solution model, perform nonlinear time domain electromagnetic field simulation under a certain operating voltage, solve the magnetic permeability distribution of the synchronous phase modulator in a saturated state and lock and export the magnetic permeability distribution; a solving module configured to introduce the synchronous phase modulator permeability distribution into a second solving model and freeze the distributionLinear electromagnetic field simulation under the magnetic conductivity state, and linear solving of stator flux linkage, wherein, because the derived magnetic conductivity already contains the magnetic field distribution of a phase modulator at a certain operating voltage, a second solving model does not need to add new excitation at the part of a 'way', and the magnetic field excitation loading mode of the second solving model is as follows:
，
in the formula (I), wherein,
stator phase A current, stator phase B current and stator phase C current,
in order to be the peak value of the current,
in order to be the electrical angular frequency of the antenna,
is the initial phase angle of the stator phase A,
is an exciting current; the expression of the stator flux linkage calculation is as follows:
in the formula (I), wherein,
is the current density within one turn and,
in the form of a vector magnetic bit,
is the volume of the region or regions,
in order to have the number of turns,lis a closed loop; and the calculation module is configured to solve the 2D finite element model based on the stator flux linkage, and calculate to obtain transient and steady state parameters of the phase modulator.
In a third aspect, an electronic device is provided, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to perform the steps of a phase modulator transient steady state parameter real time extraction method according to any embodiment of the present invention.
In a fourth aspect, the present invention also provides a computer-readable storage medium having stored thereon a computer program comprising program instructions which, when executed by a computer, cause the computer to perform the steps of a method for extracting transient steady-state parameters of a phase modulator in real time according to any of the embodiments of the present invention.
According to the method and the device for extracting the transient and steady state parameters of the phase modulator in real time, the influence of different power grid voltage faults on the distribution of the magnetic fields of the stator and the rotor is considered, the more accurate transient and steady state parameters of the synchronous phase modulator are obtained, and support is provided for better reflecting the dynamic behavior of the phase modulator, evaluating the transient and reactive capability of the phase modulator and analyzing the voltage safety performance of a system.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a method for extracting transient and steady state parameters of a phase modulator in real time according to an embodiment of the present invention;
fig. 2 is a block diagram of excitation control of a phase modulator according to an embodiment of the present invention;
fig. 3(a) is a diagram of a transient process of synchronous reactance change before and after a voltage fault in a power grid according to an embodiment of the present invention;
fig. 3(b) is a transient process diagram of transient reactance change before and after a voltage fault in the power grid according to an embodiment of the present invention;
fig. 3(c) is a transient process diagram of the transient change of the ultra-transient reactance before and after the voltage fault of the power grid according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a per unit value result of a transient and steady state parameter calculated according to an embodiment of the present invention;
fig. 5 is a block diagram of a phase modulator transient and steady state parameter real-time extraction apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1, which shows a flowchart of a method for extracting transient and steady state parameters of a phase modulator in real time according to the present application.
As shown in fig. 1, in S1, modeling a synchronous phase modulator electromagnetic finite element, wherein the finite element modeling includes establishing a 2D field coupling finite element model;
in this embodiment, the 2D field line coupling model is used to obtain the permeability of the phase modulator in the case of voltage faults of different power networks, so that transient and steady state parameters of the phase modulator can be calculated.
In S2, a phase modulator electromagnetic simulation model including excitation control is established, and current data when a fault occurs is extracted, where the current data includes phase modulator terminal currents at different grid voltage faults and excitation currents caused by different excitation controls.
In the embodiment, a phase modulator electromagnetic simulation model containing excitation control is established, so that the model considers the actual phase modulator terminal current change and the excitation current change caused by excitation control when different power grid voltage faults occur, and the problem that the phase modulator series of changes cannot be accurately projected by a 'way' in finite element simulation in the prior art is solved.
Specifically, the excitation control adopts voltage inner ring-reactive outer ring control. And in the steady state, the steady state control is realized by the voltage of the high-voltage bus and the reactive power, the transient state is subjected to rapid forced excitation or forced subtraction by a voltage closed loop, and the voltage of the system bus is taken into account during the reactive power regulation. The outer ring also introduces the deviation of system voltage, so that the phase modulator gives consideration to the balance of the system voltage and the reactive power.
In a particular embodiment, in figure 2,
as a reference value of the terminal voltage,
is the actual value of the terminal voltage,
is a system reactive reference value, Q is a system reactive actual value,
，
，
，
are the time constants of the PID,
in order to be the exciting current,
is an exciting electromotive force.
As shown in fig. 2, PID control is performed on the voltage variation and the modulated reactive variation, and excitation electromotive force is obtained with the amplified excitation current after low excitation limitation and overexcitation limitation.
In S3, leading phase modulator terminal current and exciting current into a 'way' part in a field-way coupling finite element model to obtain a first solution model, carrying out nonlinear time domain electromagnetic field simulation under a certain operating voltage, solving the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and locking and leading out the magnetic permeability distribution;
at S4, the permeability distribution of the synchronous phase modulator is introduced into a second solution model, and linear electromagnetic field simulation is performed in a frozen permeability state to linearly solve the stator flux linkage, wherein because the permeability of the synchronous phase modulator already includes the magnetic field distribution of the phase modulator at a certain operating voltage, no new excitation needs to be added to the "road" part of the second solution model, and the magnetic field excitation loading mode of the second solution model is as follows:
in the formula (I), the compound is shown in the specification,
stator phase A current, stator phase B current and stator phase C current,
in order to be the peak value of the current,
in order to be the electrical angular frequency of the antenna,
is the initial phase angle of the stator phase A,
is an exciting current;
the expression of the stator flux linkage calculation is as follows:
in the formula (I), the compound is shown in the specification,
is the current density within one turn and,
in the form of a vector magnetic bit,
is the volume of the region or regions,
in order to have the number of turns,lis a closed loop;
in S5, the 2D finite element model is solved based on the stator flux linkage, and transient and steady state parameters of the phase modulator are calculated.
In this embodiment, the step of calculating and obtaining transient and steady state parameters of the phase modulator specifically includes:
calculating the expression of the synchronous reactance as follows:
in the formula (I), the compound is shown in the specification,
in order to be a synchronous reactance,
in order to have a steady-state stator flux linkage,
in order to be the frequency of the radio,
is a voltage of a limit value, and,
is rated current.
Calculating the expression for the transient reactance as:
in the formula (I), the compound is shown in the specification,
in order to be a transient reactance,
in order to be a transient stator flux linkage,
in order to be the frequency of the radio,
is a voltage of a limit value, and,
is rated current.
Calculating the expression of the transient reactance as follows:
in the formula (I), the compound is shown in the specification,
in order to achieve an ultra-transient reactance,
in order to be a super-transient stator flux linkage,
in order to be the frequency of the radio,
is a voltage of a rated voltage, and is,
is the rated current.
In summary, the method of the application establishes a phase modulator electromagnetic simulation model containing excitation control, extracts phase modulator end current and excitation current caused by different excitation control when different grid voltage faults occur based on the phase modulator electromagnetic simulation model, introduces the phase modulator end current and the excitation current into a 'way' part in a field-path coupling finite element model to obtain a first solution model, performs nonlinear time domain electromagnetic field simulation under a certain operating voltage, solves synchronous phase modulator permeability distribution in a saturated state, locks and derives the synchronous phase modulator permeability distribution, introduces the synchronous phase modulator permeability distribution into a second solution model, performs linear electromagnetic field simulation in a frozen permeability state, linearly solves stator flux linkage, and finally calculates to obtain phase modulator transient steady state parameters based on a stator flux linkage 2D finite element model, the influence of different power grid voltage faults on the distribution of the magnetic fields of the stator and the rotor is considered, more accurate transient and steady state parameters of the synchronous phase modulator are obtained, and support is provided for better reflecting the dynamic behavior of the phase modulator, evaluating the transient reactive power capability of the phase modulator and analyzing the voltage safety performance of a system.
Referring to fig. 3(a) -3 (c), transient process diagrams of transient steady-state parameter changes before and after a grid voltage fault are shown.
As shown in fig. 3(a) -3 (c), the solid line is the transient-state reactance parameter without considering magnetic field saturation, and the dotted line is the transient-state reactance parameter with considering magnetic field saturation. The voltage drop occurs at 0.05s, and the transient steady state parameters considering the magnetic field saturation all drop, but the transient steady state parameters not considering the magnetic field saturation do not change. The voltage suddenly drops into a transient process, so that strong impact current is generated, the magnetic field in the motor is distorted, and the local part is seriously saturated, so that the reactance is reduced. After the voltage drops by 0.05s, the reactance decreases and gradually recovers again as time increases. Synchronous reactance drops to 88% before the fault at most; transient reactance is similar to synchronous reactance; the transient reactance drops to a maximum of 80% before the fault.
Please refer to fig. 4, which shows a schematic diagram of the per unit value result of the transient and steady state parameter calculated according to the present application.
As shown in figure 4 of the drawings,
is a direct-axis synchronous reactance, and is,
is a quadrature-axis synchronous reactance, and is,
in order to be a direct-axis transient reactance,
in order to be a quadrature axis transient reactance,
is a direct-axis ultra-transient reactance,
is quadrature axis transient reactance.
The result can reflect the influence of the power grid voltage fault on the transient state parameters, and after the power grid voltage fault, the distortion of the magnetic field inside the motor is locally saturated due to the influence of the impact current, so that the steady state parameters and the transient state parameters of the motor are reduced. And after the working condition is changed for about 0.01s, the synchronous reactance, the transient reactance and the ultra-transient reactance fall to the minimum value. The reactance parameter minimum value decreases with increasing voltage jump degree and decreases with increasing initial exciting current.
Please refer to fig. 5, which shows a block diagram of a phase modulator transient steady state parameter real-time extraction apparatus provided in the present application.
As shown in fig. 5, the phase modifier transient and steady state parameter real-time extraction apparatus 200 includes a modeling module 210, an extraction module 220, a simulation module 230, a solving module 240, and a calculation module 250.
The modeling module 210 is configured to model electromagnetic finite elements of the synchronous phase modulator, wherein the finite element modeling includes establishing a 2D field path coupling finite element model; an extraction module 220 configured to establish a phase modulator electromagnetic simulation model with excitation control, and extract current data when a fault occurs, wherein the current data includes phase modulator terminal currents at different grid voltage faults and excitation currents caused by different excitation controls; the simulation module 230 is configured to introduce phase modulator terminal current and excitation current into a 'way' part in the field-way coupling finite element model to obtain a first solution model, perform nonlinear time domain electromagnetic field simulation under a certain operating voltage, solve the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and lock and export the magnetic permeability distribution; the solving module 240 is configured to introduce the magnetic permeability distribution of the synchronous phase modulator into a second solving model, perform linear electromagnetic field simulation in a frozen magnetic permeability state, and linearly solve the stator flux linkage; and the calculating module 250 is configured to solve the 2D finite element model based on the stator flux linkage, and calculate to obtain transient and steady state parameters of the phase modulator.
It should be understood that the modules recited in fig. 5 correspond to various steps in the method described with reference to fig. 1. Thus, the operations and features described above for the method and the corresponding technical effects are also applicable to the modules in fig. 5, and are not described again here.
In other embodiments, the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored, where the computer-executable instructions may execute the phase modulation machine transient and steady-state parameter real-time extraction method in any of the above method embodiments;
as one embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions configured to:
modeling an electromagnetic finite element of a synchronous phase modulator, wherein the finite element modeling comprises establishing a 2D field path coupling finite element model;
establishing a phase modulator electromagnetic simulation model containing excitation control, and extracting current data when a fault occurs, wherein the current data comprises phase modulator terminal currents when different power grid voltages have faults and excitation currents caused by different excitation control;
leading the phase modulator terminal current and the exciting current into a 'way' part in a field-way coupling finite element model to obtain a first solving model, carrying out nonlinear time domain electromagnetic field simulation under a certain operating voltage, solving the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and locking and leading out the magnetic permeability distribution;
introducing the magnetic permeability distribution of the synchronous phase modulator into a second solving model, carrying out linear electromagnetic field simulation in a frozen magnetic permeability state, and linearly solving a stator flux linkage;
and solving the 2D finite element model based on the stator flux linkage, and calculating to obtain the transient and steady state parameters of the phase modulator.
The computer-readable storage medium may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created in accordance with use of the phase modulator transient steady state parameter real-time extraction device, and the like. Further, the computer-readable storage medium may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer readable storage medium optionally includes a memory remotely located from the processor, and the remote memory may be connected to the phase modulator transient steady state parameter real time extraction device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 6, the electronic device includes: a processor 310 and a memory 320. The electronic device may further include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330, and the output device 340 may be connected by a bus or other means, such as the bus connection in fig. 6. The memory 320 is the computer-readable storage medium described above. The processor 310 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 320, that is, the method for extracting transient and steady state parameters of the phase modulation machine in real time according to the embodiment of the method is implemented. The input device 330 may receive input numeric or character information and generate key signal inputs related to user settings and function control of the phase modulator transient and steady state parameter real-time extraction device. The output device 340 may include a display device such as a display screen.
The device can execute the method provided by the embodiment of the invention and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
As an implementation manner, the electronic device is applied to a phase modulator transient and steady state parameter real-time extraction device, and is used for a client, and includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to:
modeling an electromagnetic finite element of a synchronous phase modulator, wherein the finite element modeling comprises establishing a 2D field path coupling finite element model;
establishing a phase modulator electromagnetic simulation model containing excitation control, and extracting current data when a fault occurs, wherein the current data comprises phase modulator terminal currents when different power grid voltages have faults and excitation currents caused by different excitation control;
leading the phase modulator terminal current and the exciting current into a 'way' part in a field-way coupling finite element model to obtain a first solving model, carrying out nonlinear time domain electromagnetic field simulation under a certain operating voltage, solving the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and locking and leading out the magnetic permeability distribution;
introducing the magnetic permeability distribution of the synchronous phase modulator into a second solving model, carrying out linear electromagnetic field simulation in a frozen magnetic permeability state, and linearly solving a stator flux linkage;
and solving the 2D finite element model based on the stator flux linkage, and calculating to obtain the transient and steady state parameters of the phase modulator.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A phase modulator transient and steady state parameter real-time extraction method is characterized by comprising the following steps:
s1: modeling an electromagnetic finite element of a synchronous phase modulator, wherein the finite element modeling comprises establishing a 2D field path coupling finite element model;
s2: establishing a phase modulator electromagnetic simulation model containing excitation control, and extracting current data when a fault occurs, wherein the current data comprises phase modulator terminal currents when different power grid voltages have faults and excitation currents caused by different excitation control;
s3: leading the phase modulator terminal current and the exciting current into a 'way' part in a field-way coupling finite element model to obtain a first solving model, carrying out nonlinear time domain electromagnetic field simulation under a certain operating voltage, solving the magnetic permeability distribution of the synchronous phase modulator in a saturated state, and locking and leading out the magnetic permeability distribution;
s4: and (2) introducing the permeability distribution of the synchronous phase modulator into a second solving model, performing linear electromagnetic field simulation in a frozen permeability state, and linearly solving the stator flux linkage, wherein because the permeability of the synchronous phase modulator already contains the magnetic field distribution of the phase modulator at a certain operating voltage, no new excitation needs to be added to the part of the second solving model on a 'way', and the magnetic field excitation loading mode of the second solving model is as follows:
Ia＝Imcos(ωt+θ)
If＝0
in the formula Ia、Ib、IcStator phase A current, stator phase B current and stator phase C current, ImIs the peak value of current, omega is the electrical angular frequency, theta is the initial phase angle of stator phase A, IfIs exciting current, t is current sine wave change time;
the expression of the stator flux linkage calculation is as follows:
in the formula, J is the current density in one turn, A is the vector magnetic potential, v is the volume of the region, n is the number of turns, and l is a closed loop;
s5: solving a 2D finite element model based on stator flux linkage, and calculating to obtain transient and steady state parameters of the phase modulator, wherein the transient and steady state parameters of the phase modulator specifically comprise a synchronous reactance, a transient reactance and an ultra-transient reactance, and the expression of the synchronous reactance is calculated as follows:
in the formula, xd，qIn order to be a synchronous reactance,
for steady-state stator flux linkage, f is frequency, UNIs a credit voltage, INIs rated current;
calculating the expression for the transient reactance as:
in formula (II), x'd，qIn order to be a transient reactance,
for transient stator flux linkage, f is frequency, UNIs a credit voltage, INIs rated current;
calculating the expression of the transient reactance as follows:
in the formula, x ″)d，qIn order to achieve an ultra-transient reactance,
for a super-transient stator flux linkage, f is frequency, UNTo rated voltage, INIs the rated current.
2. The method according to claim 1, wherein in S2, the excitation control is voltage inner loop-reactive outer loop control, steady state control is realized by high-voltage bus voltage and reactive power in steady state, and fast excitation or strong subtraction is performed by voltage closed loop in transient state.
3. The utility model provides a phase modifier transient steady state parameter real-time extraction element which characterized in that includes:
the modeling module is configured to model electromagnetic finite elements of the synchronous phase modulator, wherein the finite element modeling comprises establishing a 2D field path coupling finite element model;
the extraction module is configured to establish a phase modulator electromagnetic simulation model containing excitation control and extract current data when a fault occurs, wherein the current data comprises phase modulator terminal currents when different power grid voltage faults occur and excitation currents caused by different excitation control;
the simulation module is configured to introduce phase modulator terminal current and excitation current into a 'way' part in the field-way coupling finite element model to obtain a first solution model, perform nonlinear time domain electromagnetic field simulation under a certain operating voltage, solve the magnetic permeability distribution of the synchronous phase modulator in a saturated state and lock and export the magnetic permeability distribution;
the solving module is configured to introduce the magnetic permeability distribution of the synchronous phase modulator into a second solving model, perform linear electromagnetic field simulation in a frozen magnetic permeability state, and solve the stator flux linkage linearly, wherein because the derived magnetic permeability already comprises the magnetic field distribution of the phase modulator at a certain operating voltage, no new excitation needs to be added to the part of the second solving model on the 'way', and the magnetic field excitation loading mode of the second solving model is as follows:
Ia＝Imcos(ωt+θ)
If＝0
in the formula Ia、Ib、IcStator phase A current, stator phase B current and stator phase C current, ImIs the peak value of current, omega is the electrical angular frequency, theta is the initial phase angle of stator phase A, IfIs exciting current, t is current sine wave change time;
the expression of the stator flux linkage calculation is as follows:
in the formula, J is the current density in one turn, A is the vector magnetic potential, v is the volume of the region, n is the number of turns, and l is a closed loop;
the calculation module is configured to solve the 2D finite element model based on the stator flux linkage, calculate and obtain transient and steady-state parameters of the phase modulator, wherein the transient and steady-state parameters of the phase modulator specifically comprise a synchronous reactance, a transient reactance and an ultra-transient reactance, and calculate the expression of the synchronous reactance as follows:
in the formula, xd，qIn order to be a synchronous reactance,
for steady-state stator flux linkage, f is frequency, UNIs a credit voltage, INIs rated current;
calculating the expression for the transient reactance as:
in formula (II), x'd，qIn order to be a transient reactance,
for transient stator flux linkage, f is frequency, UNIs a credit voltage, INIs rated current;
calculating the expression of the transient reactance as follows:
in the formula, x ″)d，qIn order to achieve an ultra-transient reactance,
for a super-transient stator flux linkage, f is frequency, UNTo rated voltage, INIs the rated current.
4. An electronic device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any of claims 1-2.
5. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1 to 2.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520353A (en) * | 2011-12-09 | 2012-06-27 | 清华大学 | Synchronous generator model parameter multi-step identification method |
| CN106936359A (en) * | 2015-12-29 | 2017-07-07 | 中国电力科学研究院 | A kind of determination method of electromechanical transient synchronous machine model and initial q axles parameter of saturation |
| CN109962479A (en) * | 2019-03-28 | 2019-07-02 | 国网山东省电力公司电力科学研究院 | A kind of synchronous capacitor electric parameter distribution joint discrimination method based on alternating iteration optimization |
| CN109980658A (en) * | 2019-04-29 | 2019-07-05 | 重庆大学 | A kind of appraisal procedure of the idle fan-out capability of synchronous capacitor transient state |
| CN110162892A (en) * | 2019-05-24 | 2019-08-23 | 重庆大学 | A kind of large synchronous compensator stator end leakage inductance calculation method |
| US10686394B1 (en) * | 2020-02-05 | 2020-06-16 | The Florida International University Board Of Trustees | Condition monitoring and fault detection in induction motors |
| CN112799313A (en) * | 2021-01-05 | 2021-05-14 | 电子科技大学 | Modeling method of excitation synchronous motor and hardware-in-loop test system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212567A (en) * | 2019-07-09 | 2019-09-06 | 江苏方天电力技术有限公司 | High voltage ac/dc serial-parallel power grid numerical simulation modeling method containing large-scale phase modifier |
| CN111914442B (en) * | 2020-06-22 | 2022-11-04 | 东南大学 | Modeling method of flux linkage adjustable permanent magnet synchronous reluctance motor |
| CN112434409A (en) * | 2020-11-13 | 2021-03-02 | 国家电网有限公司 | Synchronous generator full-electromagnetic transient simulation method based on constant impedance interface |
-
2021
- 2021-07-13 CN CN202110787529.2A patent/CN113239601B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520353A (en) * | 2011-12-09 | 2012-06-27 | 清华大学 | Synchronous generator model parameter multi-step identification method |
| CN106936359A (en) * | 2015-12-29 | 2017-07-07 | 中国电力科学研究院 | A kind of determination method of electromechanical transient synchronous machine model and initial q axles parameter of saturation |
| CN109962479A (en) * | 2019-03-28 | 2019-07-02 | 国网山东省电力公司电力科学研究院 | A kind of synchronous capacitor electric parameter distribution joint discrimination method based on alternating iteration optimization |
| CN109980658A (en) * | 2019-04-29 | 2019-07-05 | 重庆大学 | A kind of appraisal procedure of the idle fan-out capability of synchronous capacitor transient state |
| CN110162892A (en) * | 2019-05-24 | 2019-08-23 | 重庆大学 | A kind of large synchronous compensator stator end leakage inductance calculation method |
| US10686394B1 (en) * | 2020-02-05 | 2020-06-16 | The Florida International University Board Of Trustees | Condition monitoring and fault detection in induction motors |
| CN112799313A (en) * | 2021-01-05 | 2021-05-14 | 电子科技大学 | Modeling method of excitation synchronous motor and hardware-in-loop test system |
Non-Patent Citations (3)
| Title |
|---|
| Transient Performance Analysis of Induction Motor Using Field-Circuit Coupled Finite-Element Method;Youpeng Huangfu等;《IEEE》;20140226;第50卷(第2期);1-4 * |
| 同步电机瞬态和超瞬态电抗的有限元计算;王斌;《上海大中型电机》;20110815(第03期);13-16 * |
| 基于时步有限元的抽水蓄能电机瞬态参数计算方法的对比;王伟华等;《电工技术学报》;20150105(第01期);95-103 * |
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