CN113741214A - Real-time dynamic simulation test system and method for rapid frequency response controller of new energy station - Google Patents
Real-time dynamic simulation test system and method for rapid frequency response controller of new energy station Download PDFInfo
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Abstract
The invention belongs to the technical field of computer simulation, and discloses a real-time dynamic simulation test system for a rapid frequency response controller of a new energy station. The system is established based on an RT-LAB real-time simulation analysis platform and comprises a hardware circuit of a rapid frequency response controller of a new energy station and a dynamic system mathematical model, wherein the dynamic system mathematical model comprises a new energy station model and a power grid model established in MATLAB/Simulink; the rapid frequency response controller of the new energy station is interconnected with the dynamic system mathematical model through the I/O physical interface and the MODBUS communication module, so that a frequency step disturbance test, an anti-disturbance performance check and an automatic power generation control coordination test real-time dynamic simulation test of the rapid frequency response controller of the new energy station are realized. The simulation test system provided by the embodiment of the invention is accurate and reliable, can realize performance test and verification of the new energy grid-related device, provides test data for developing optimization of a grid-related device operation strategy, and is beneficial to improving the grid-related performance of a new energy station.
Description
Technical Field
The invention relates to the technical field of simulation, in particular to a real-time dynamic simulation test system for a rapid frequency response controller of a new energy station, and further relates to a real-time dynamic simulation test method for the rapid frequency response controller of the new energy station.
Background
In order to solve various problems such as shortage of fossil energy and environmental pollution caused by the shortage of fossil energy, renewable energy power generation represented by wind power and photovoltaic has attracted extensive attention due to low carbon, environmental protection, mature technology and large-scale production. In recent years, the installed proportion of new energy in China continuously shows an explosive growth situation, but because the new energy is connected with a large power grid by adopting a power electronic conversion device in a large scale and a conventional power supply is replaced by a large amount, the inertia level of the system is reduced, the spare capacity is reduced, the rotational inertia and the frequency adjusting capacity of the system are continuously reduced, and the problem of the frequency control characteristic of the power grid is increasingly highlighted and the problem of the frequency of the whole power grid is easily induced under the condition that high power is lacked due to alternating current and direct current faults. In the face of the current situations that a new energy power station is slow in frequency response, a conventional unit is large in frequency modulation peak load regulation pressure and high in cost, a primary frequency modulation function of the new energy power station is a trend of new energy technology development, and GB 38755 plus 2019 'Power System safety guide rule' implemented in 7/1/2021 clearly indicates that wind power generation and photovoltaic power generation have the primary frequency modulation capability.
Therefore, how to provide a simulation system to implement performance test and verification of a new energy grid-related device is a problem to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a real-time dynamic simulation test system and method for a rapid frequency response controller of a new energy station, and aims to solve the problems of performance test and verification of a new energy grid-related device. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, a real-time dynamic simulation test system for a fast frequency response controller of a new energy station is provided.
In one embodiment, the real-time dynamic simulation test system of the rapid frequency response controller of the new energy station is established based on an RT-LAB real-time simulation analysis platform and comprises a hardware circuit of the rapid frequency response controller of the new energy station and a dynamic system mathematical model, wherein the dynamic system mathematical model comprises a new energy station model and a power grid model established in MATLAB/Simulink; the new energy station rapid frequency response controller is interconnected with the dynamic system mathematical model through the I/O physical interface and the MODBUS communication module respectively, and a new energy station rapid frequency response controller frequency step disturbance test, an anti-disturbance performance check and an automatic power generation control coordination test real-time dynamic simulation test are realized.
Optionally, the IO physical interface includes: the analog quantity output interface, the analog quantity input interface, the digital quantity output interface and the digital quantity input interface;
the analog quantity output interface and the digital quantity output interface are respectively used for acquiring analog quantity and judgment mark 0-1 digital quantity output by a dynamic system mathematical model for the rapid frequency response controller of the new energy station; the analog quantity input interface and the digital quantity input interface are used for acquiring analog quantity and judgment mark digital quantity output by the rapid frequency response controller of the new energy station for the dynamic system mathematical model respectively.
Optionally, the MODBUS communication module includes a remote signaling value unit, a remote measuring value unit, a remote adjusting value unit and a remote controlling value unit;
the remote signaling value unit and the remote measuring value unit are used for acquiring a 0-1 variable and an analog quantity of the rapid frequency response controller of the new energy station for a dynamic system mathematical model respectively; the remote regulating value unit and the remote control value unit are used for collecting a dynamic system mathematical model 0-1 variable and an analog quantity for the rapid frequency response controller of the new energy station respectively.
Optionally, the remote measurement value is an instruction value input by the new energy station fast frequency response controller to the dynamic system mathematical model through the MODBUS communication module.
Optionally, the remote signaling value is a digital quantity input by the new energy station rapid frequency response controller to the dynamic system mathematical model through the MODBUS communication module, and includes a grid-connected switching value and a controller input state quantity of the new energy station rapid frequency response controller.
Optionally, the remote control value is an instruction value input to the new energy station rapid frequency response controller by the dynamic system mathematical model through the MODBUS communication module.
Optionally, the remote control value is a boolean variable input by the dynamic system mathematical model to the new energy station fast frequency response controller through the MODBUS communication module and used for judging whether the remote control value is used.
Optionally, when building a dynamic system mathematical model by using Simulink, packaging a top-level subsystem and naming subsystems with prefixes SM _, SC _ and SS _ is required; wherein the content of the first and second substances,
the SM _ subsystem is responsible for real-time calculation and network synchronization of a dynamic system mathematical model, and the system only needs to comprise one SM _ subsystem;
when the system realizes distributed processing through multi-core, the dynamic system mathematical model also needs to comprise an SS _ subsystem, and the subsystem comprises a computing unit of the dynamic system mathematical model;
the SC subsystem comprises a basic block for collecting and displaying data and is responsible for monitoring key parameters and curves in the system in real time or processing data communication among subsystems afterwards.
Optionally, the moving die simulation test system includes:
the SM _ system subsystem is used for simulating the topology of the main circuit;
the SS _ ctrol subsystem is used for simulating an IO port and an MODBUS communication module of the new energy station rapid frequency response controller and the RTLAB;
and the SC _ Console subsystem is used for displaying the waveform.
According to a second aspect of the embodiment of the invention, a real-time dynamic simulation test method for a fast frequency response controller of a new energy station is provided.
In one embodiment, the method for real-time dynamic simulation testing of the fast frequency response controller of the new energy station performs simulation testing based on the real-time dynamic simulation testing system, and includes: the method comprises a new energy station rapid frequency response controller frequency step disturbance test, an anti-disturbance performance check and an automatic power generation control coordination test real-time dynamic simulation test.
Optionally, the frequency step perturbation test comprises:
the step disturbance is divided into step up disturbance and step down disturbance, the frequency is stepped from 50Hz to 50.20Hz, and the step up disturbance is obtained by continuously recovering to 50Hz for 20 s; the frequency is stepped from 50Hz to 49.80Hz, and the step descending disturbance is realized by continuously recovering to 50Hz for 20 s;
the response time, the active power before the step disturbance and the active power after the step disturbance are analyzed, so that the quick frequency response capability is evaluated.
Optionally, the anti-disturbance performance check comprises:
the test is carried out under the set working condition, a frequency signal generating device is adopted to simulate the high-low voltage ride through transient process of the power grid, the following two kinds of check signals are respectively output, and whether the quick frequency response function of the new energy station malfunctions is detected;
signal 1: selecting a certain phase of the calculated frequency of the rapid frequency response controller of the new energy station, instantly dropping the voltage amplitude to 0%, 20%, 40%, 60% and 80% of rated voltage for 150ms, and completing phase shift for 2 times when the voltage drops and recovers, wherein the phase shift is 60 degrees each time;
signal 2: and selecting three-phase voltage amplitude value instant steps to 115%, 120%, 125% and 130% rated voltage, lasting for 500ms, and finishing 2 phase shifts when the voltage steps and recovers, wherein each phase shift is 60 degrees.
Optionally, the automatic power generation control coordination test is used for verifying whether the rapid frequency response function of the new energy station can be well matched with the secondary frequency modulation command of the dispatching terminal, and the test is executed in a mode of superposing two commands under a set working condition, namely, the first command completes the response action and issues the second command during the execution period, and the test is carried out for 8 times in combination with frequency disturbance and increased and decreased output.
Optionally, in the automatic power generation control coordination test process, the following steps are performed in combination with the frequency disturbance and the increase/decrease output in the test:
step (3-1), the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-2), stepping from 50Hz to 50.20Hz according to 10% of rated capacity + frequency of the secondary frequency modulation station;
step (3-3), the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-4), stepping the frequency of 10% + of the rated capacity of the secondary frequency modulation delocalization station from 50Hz to 50.20 Hz;
step (3-5), the frequency is stepped from 50Hz to 49.80Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-6), the frequency of 10% + of the rated capacity of the secondary frequency modulation station is stepped from 50Hz to 49.80 Hz;
step (3-7), the frequency is stepped from 50Hz to 49.80Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-8), the frequency of 10% + of the rated capacity of the secondary frequency modulation delocalization station is stepped from 50Hz to 49.80 Hz;
where "+" indicates that the two instructions overlap in time.
According to a third aspect of embodiments of the present invention, there is provided a computer apparatus.
In some embodiments, the computer device comprises a memory storing a computer program and a processor implementing the steps of the above method when executing the computer program.
According to a fourth aspect of embodiments of the present invention, there is provided a computer-readable storage medium.
In some embodiments, a computer-readable storage medium, on which a computer program is stored, characterized in that the computer program realizes the steps of the above-described method when executed by a processor.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
(1) a set of real-time dynamic simulation test system of the rapid frequency response controller of the new energy station is established, hardware wiring, model establishment, test conditions, relevant parameters and the like before simulation test development are determined, and therefore the simulation test has authenticity and feasibility.
(2) The method comprises the steps of carrying out 3 simulation tests of frequency step disturbance, disturbance prevention performance verification and AGC coordination on a new energy station, introducing response time, active power before step disturbance, active power after step disturbance, controller active instruction, AGC active instruction, theoretical power and actual power, and carrying out comprehensive analysis on a rapid frequency response controller of the new energy station by using a scoveview waveform analysis function of RT-LAB.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram illustrating a new energy plant fast frequency response controller real-time dynamic simulation test system in accordance with an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating a new energy station fast frequency response controller real-time dynamic simulation test system according to an exemplary embodiment;
FIG. 3a is a frequency waveform diagram illustrating a frequency step perturbation test according to an exemplary embodiment;
FIG. 3b is a waveform diagram illustrating actual power and controller active commands for a frequency step disturbance test, according to an exemplary embodiment;
FIG. 4a is a three-phase voltage waveform diagram illustrating an anti-disturbance performance verification test according to an exemplary embodiment;
FIG. 4b is a frequency waveform diagram illustrating an anti-disturbance performance verification test according to an exemplary embodiment;
FIG. 4c is a waveform diagram illustrating theoretical power, actual power, and controller active commands for a disturbance rejection performance verification test in accordance with an exemplary embodiment;
FIG. 5a is a three-phase voltage waveform diagram of an anti-disturbance performance verification test shown in accordance with another exemplary embodiment;
FIG. 5b is a frequency waveform diagram illustrating an anti-disturbance performance verification test according to another exemplary embodiment;
FIG. 5c is a waveform diagram illustrating theoretical power, actual power, and controller real power commands for a disturbance rejection performance verification test in accordance with another exemplary embodiment;
FIG. 6a is a frequency waveform diagram illustrating an AGC coordination trial according to an exemplary embodiment;
FIG. 6b is a diagram illustrating AGC active command, real power, controller active power waveforms for an AGC coordination test according to an exemplary embodiment;
FIG. 7 is a schematic diagram illustrating a configuration of a computer device, according to an example embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.
Herein, the term "plurality" means two or more, unless otherwise specified.
Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.
Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
Fig. 1 shows an embodiment of the real-time dynamic simulation test system of the fast frequency response controller of the new energy station.
In the embodiment, the dynamic simulation test system is established based on an RT-LAB real-time simulation analysis platform and comprises a hardware circuit of a rapid frequency response controller of a new energy station and a dynamic system mathematical model, wherein the dynamic system mathematical model comprises a new energy station model and a power grid model established in MATLAB/Simulink; the rapid frequency response controller of the new energy station is interconnected with a dynamic system mathematical model through an I/O physical interface and a MODBUS communication module respectively, so that a frequency step disturbance test, an anti-disturbance performance check and an Automatic Generation Control (AGC) coordination test real-time dynamic simulation test of the rapid frequency response controller of the new energy station are realized. The dynamic simulation test system is externally connected with part of hardware on the basis of the mathematical model of the dynamic system, so that a hardware circuit is tested in an environment meeting the overall performance index of the system, and the reliability of the simulation test can be effectively improved.
In the moving die simulation test system, hardware equipment of a rapid frequency response controller of the new energy station is connected with an RT-LAB platform through an I/O physical interface and an MODBUS communication module, and a new energy station model and a power grid model are set up through Simulink/MATLAB simulation. The RT-LAB is a digital moving-die real-time simulation platform supporting software and hardware expansion, directly applies a dynamic system mathematical model established in MATLAB/Simulink to a real-time simulation test, has high efficiency, and also has the authenticity of connecting hardware into a simulation test loop.
The RT-LAB real-time simulation analysis platform is connected with the new energy station rapid frequency response controller through an I/O physical interface and an MODBUS communication module, wherein the IO physical interface mainly comprises four types, namely an analog quantity output (AO) interface, an analog quantity input (AI) interface, a digital quantity output (DO) interface and a digital quantity input (DI) interface. The AO interface and the DO interface respectively acquire analog quantity and judgment mark 0-1 digital quantity output by a dynamic system mathematical model for the new energy station rapid frequency response controller, and the AI interface and the DI interface respectively acquire analog quantity and judgment mark 0-1 digital quantity output by the new energy station rapid frequency response controller for the dynamic system mathematical model. In the embodiment, an AO interface is adopted to transmit an analog quantity measurement value of a power grid in a dynamic system mathematical model to a new energy station rapid frequency response controller, and the controller mainly comprises a wind power plant grid-connected point three-phase alternating current voltage, a three-phase alternating current and a grounding signal.
The MODBUS communication module comprises a remote signaling value unit, a remote measuring value unit, a remote adjusting value unit and a remote control value unit, wherein the remote signaling value unit and the remote measuring value unit respectively acquire a 0-1 variable and an analog quantity of the rapid frequency response controller of the new energy station for the dynamic system mathematical model, and the remote adjusting value unit and the remote control value unit respectively acquire a 0-1 variable and an analog quantity of the dynamic system mathematical model for the rapid frequency response controller of the new energy station; the remote measurement value is an instruction value input by the rapid frequency response controller of the new energy station to the dynamic system mathematical model through the MODBUS communication module, and the instruction value is an analog quantity and comprises an active instruction value of the rapid frequency response controller of the new energy station; the remote signaling value is 0-1 digital quantity input to a dynamic system mathematical model by a rapid frequency response controller of the new energy station through an MODBUS communication module, and the model comprises grid-connected switching quantity and controller input state quantity of the rapid frequency response controller of the new energy station; the remote control value is an instruction value input to the rapid frequency response controller of the new energy station by the dynamic system mathematical model through the MODBUS communication module, and the instruction value is an analog quantity and comprises an AGC active instruction value; the remote control value is a Boolean variable which is input into the rapid frequency response controller of the new energy station by the dynamic system mathematical model through the MODBUS communication module and is used for judging whether the remote control value is used or not, and the remote control value mainly comprises 0-1 digital quantity.
In one embodiment, when building a dynamic system mathematical model using Simulink, the top subsystem is encapsulated and named with the prefixes SM _, SC _ and SS _ subsystems. The SM _ subsystem is responsible for real-time calculation and network synchronization of a dynamic system mathematical model, and only one SM _ subsystem is required to be contained in the model. When the whole model realizes distributed processing through multiple cores, the model also needs to include an SS _ subsystem, and the subsystem also includes a computing unit of the model. The SC subsystem comprises a basic block for collecting and displaying data and is responsible for monitoring key parameters and curves in the system in real time or processing data communication among subsystems afterwards.
In one embodiment, the dynamic system mathematical model comprises three subsystems, wherein the SM _ system subsystem mainly simulates a main circuit topology and comprises a large power grid model, a 110kV line and 110kV/35kV step-up transformer, a new energy station grid-connected switch and a new energy station model; the SS _ ctrol subsystem is mainly used for simulating an IO interface and an MODBUS communication module of a new energy station rapid frequency response controller and an RTLAB, and the SC _ console subsystem is mainly used for displaying waveforms and displaying symbolic voltage, current, controller active instructions, AGC active instructions, theoretical power, actual power, frequency and the like of the new energy station.
In another embodiment, the invention further provides a real-time dynamic simulation test method for a fast frequency response controller of a new energy station, which performs a simulation test based on the simulation test system, and includes: the method comprises a new energy station rapid frequency response controller frequency step disturbance test, an anti-disturbance performance check and an automatic power generation control coordination test real-time dynamic simulation test.
In one embodiment, the frequency step perturbation test comprises: the step disturbance is divided into step up disturbance and step down disturbance, the frequency is stepped from 50Hz to 50.20Hz, and the step up disturbance is obtained by continuously recovering to 50Hz for 20 s; the frequency is stepped from 50Hz to 49.80Hz, and the step descending disturbance is realized by continuously recovering to 50Hz for 20 s; the response time, the active power before the step disturbance and the active power after the step disturbance are analyzed, so that the quick frequency response capability is evaluated.
In one embodiment, the anti-disturb performance check comprises: the test is carried out under the set working condition, a frequency signal generating device is adopted to simulate the high-low voltage ride through transient process of the power grid, the following two kinds of check signals are respectively output, and whether the quick frequency response function of the new energy station malfunctions is detected;
signal 1: selecting a certain phase of the calculated frequency of the rapid frequency response controller of the new energy station, instantly dropping the voltage amplitude to 0%, 20%, 40%, 60% and 80% of rated voltage for 150ms, and completing phase shift for 2 times when the voltage drops and recovers, wherein the phase shift is 60 degrees each time;
signal 2: and selecting three-phase voltage amplitude value instant steps to 115%, 120%, 125% and 130% rated voltage, lasting for 500ms, and finishing 2 phase shifts when the voltage steps and recovers, wherein each phase shift is 60 degrees.
In one embodiment, the automatic power generation control coordination test is used to verify whether the fast frequency response function of the new energy station can be well matched with the secondary frequency modulation command of the dispatching terminal, and is executed in a mode of overlapping two commands under a set working condition, that is, the first command completes the response action and issues the second command during the execution period, and the test is performed for 8 times in combination with frequency disturbance and increased and decreased output, and includes:
step (3-1), the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-2), stepping from 50Hz to 50.20Hz according to 10% of rated capacity + frequency of the secondary frequency modulation station;
step (3-3), the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-4), stepping the frequency of 10% + of the rated capacity of the secondary frequency modulation delocalization station from 50Hz to 50.20 Hz;
step (3-5), the frequency is stepped from 50Hz to 49.80Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-6), the frequency of 10% + of the rated capacity of the secondary frequency modulation station is stepped from 50Hz to 49.80 Hz;
step (3-7), the frequency is stepped from 50Hz to 49.80Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-8), the frequency of 10% + of the rated capacity of the secondary frequency modulation delocalization station is stepped from 50Hz to 49.80 Hz;
where "+" indicates that the two instructions overlap in time.
The following provides a specific embodiment of the real-time dynamic simulation test system for the fast frequency response controller of the new energy station.
The built RT-LAB semi-physical real-time dynamic simulation test system comprises a hardware part, a software part and a test system structure schematic diagram, wherein the hardware part comprises a new energy station rapid frequency response controller, an RT-LAB simulation host machine and a simulation target machine, the software part comprises a Matlab/simulink, an RT-LAB main program, an ARTEMIS tool box, an RT-Events tool box and the like, and the test system structure schematic diagram is shown in FIG. 2. The dynamic system mathematical model simulates a centralized grid-connected wind power plant through simulation modeling, in the simulation model, hardware equipment of a new energy station rapid frequency response controller is connected with an RT-LAB platform through an I/O physical interface and an MODBUS communication mode, and a wind power plant station model and a power grid model are built through Simulink/MATLAB simulation. The dynamic system mathematical model comprises three subsystems, wherein the SM _ system subsystem mainly simulates a main circuit topology and comprises a large power grid model, a 110kV line and 110kV/35kV step-up transformer, a wind power plant grid-connected switch and a wind power plant in-field model; the SS _ ctrol subsystem is mainly used for simulating an IO port and a modbus communication model of a new energy station rapid frequency response controller and an RTLAB; the SC _ Console subsystem is mainly used for displaying waveforms and displaying symbolic voltage, current, controller active instructions, AGC active instructions, theoretical power, actual power, frequency and the like of a wind power plant power station.
The embodiment simulates a 49.5MW wind power plant, the 110KV bus is connected to the grid, different test items are required to complete simulation tests under corresponding working conditions respectively, and the test working conditions are defined as follows:
(1) working condition 1: the wind power plant is in a power limiting state, and the output interval is 20-30% of the rated capacity of the wind power plant;
(2) working condition 2: the output interval of the wind power plant is 20-30% of the rated capacity of the wind power plant, and the power is not limited;
(3) working condition 3: the wind power plant is in a power limiting state, and the output interval is 50% -90% of the rated capacity of the wind power plant;
(4) working condition 4: the output of the wind power plant is 50-90% of the rated capacity of the wind power plant, and the power is not limited.
In this example, 3 simulation tests were performed, and the test procedure was as follows:
(1) frequency step disturbance test: the step disturbance is divided into step up disturbance and step down disturbance, the frequency is stepped from 50Hz to 50.20Hz, and the step up disturbance is obtained by continuously recovering to 50Hz for 20 s; the frequency is stepped from 50Hz to 49.80Hz, and the step-down disturbance is realized by continuously returning to 50Hz for 20 s. Simulating 6 times of simulation tests according to a conventional water-fire-electricity primary frequency modulation network access test, disturbing at a primary frequency step of each simulation test under working conditions 1, 2, 3 and 4, disturbing at a primary frequency step of each simulation test under the working conditions 1 and 3, and testing the response characteristic of the wind power plant station under the condition of frequency step disturbance. The response time, the active power before the step disturbance and the active power after the step disturbance are analyzed, so that the quick frequency response capability is evaluated.
(2) And (3) checking the anti-disturbance performance: the test is carried out under the condition of working condition 1, the frequency signal generating device is adopted to simulate the transient processes of high-low voltage ride through and the like of the power grid, the following 2 kinds of check signals are respectively output, and whether the quick frequency response function of the new energy station malfunctions is detected. Signal 1: selecting a certain phase of the calculated frequency of the rapid frequency response control system, instantaneously dropping the voltage amplitude to (0%, 20%, 40%, 60%, 80%) rated voltage for 150ms, and completing phase shift for 2 times when the voltage drops and recovers, wherein each phase shift is 60 degrees. Signal 2: and selecting three-phase voltage amplitude instantaneous steps to (115%, 120%, 125% and 130%) rated voltage, lasting for 500ms, and finishing 2 phase shifts when the voltage steps and recovers, wherein each phase shift is 60 degrees.
(3) Automatic Generation Control (AGC) coordination test: the test is to verify whether the quick frequency response function of the new energy station can be well matched with the secondary frequency modulation command of the dispatching terminal, and is executed in a mode of superposing two commands under the condition of a working condition 3, namely, the first command completes the response action and is in the execution period to issue the second command, and the test is carried out for 8 times in combination with frequency disturbance and increased and decreased output.
(3-1) the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the chirp station, wherein "+" indicates that the two commands are superimposed in time sequence;
(3-2) stepping the frequency from 50Hz to 50.20Hz according to 10% + frequency of rated capacity of the secondary frequency modulation station;
(3-3) the frequency is stepped from 50Hz to 50.20Hz plus 10 percent of the rated capacity of the secondary frequency modulation delocalization station;
(3-4) stepping the frequency from 50Hz to 50.20Hz according to 10% + frequency of rated capacity of the secondary frequency modulation delocalization station;
(3-5) the frequency is stepped from 50Hz to 49.80Hz plus 10 percent of the rated capacity of the secondary frequency modulation station;
(3-6) stepping the frequency from 50Hz to 49.80Hz according to 10% + frequency of rated capacity of the secondary frequency modulation station;
(3-7) the frequency is stepped from 50Hz to 49.80Hz plus 10 percent of the rated capacity of the secondary frequency modulation delocalization station;
(3-8) stepping from 50Hz to 49.80Hz in frequency + 10% of rated capacity of the secondary frequency modulation delocalization station;
the frequency step disturbance test is analyzed by adopting a scopeview waveform analysis function of the RT-LAB, and as shown in the graphs of fig. 3a and 3b, the waveform of the wind power plant with the frequency step of 50.20Hz under the working condition 1 is shown. The test wave recording time is 30s, the response time is 0.524s, the active power before step disturbance is 12.00MW, and the active power after step disturbance is 7.05MW, so that the requirements are met.
And analyzing the disturbance prevention performance verification test by adopting a scopeview waveform analysis function of the RT-LAB, selecting a waveform diagram of the wind power plant when the amplitude of the A-phase voltage is instantly dropped to 20% and 2-time phase shifts are completed during voltage dropping and recovery, wherein the waveform diagram is shown in fig. 4a, 4b and 4c when the phase shift is 60 degrees each time. The active instruction of the rapid frequency response controller of the new energy station has no action in the process of simulating the low-voltage ride through of the power grid, namely the rapid frequency response function of the wind power station is reliable and does not act, and the requirements are met.
Selecting a waveform diagram of the wind power plant when the A, B, C three-phase voltage amplitude is instantaneously stepped to 115%, completing 2 phase shifts during voltage step and recovery, and each phase shift is 60 degrees, as shown in fig. 5a, 5b and 5 c. The active instruction of the rapid frequency response controller of the new energy station has no action in the process of simulating the high voltage ride through of the power grid, namely the rapid frequency response function of the wind power station is reliable and does not act, and the requirements are met.
And analyzing the AGC coordination test by adopting a scopeview waveform analysis function of the RT-LAB, and selecting a response result of instructions of increasing 10% Pn by wind power plant frequency up-disturbance (50 → 50.20Hz) + secondary frequency modulation, as shown in fig. 6a and 6 b. It can be seen that after high-frequency step disturbance occurs, the active power command of the rapid frequency response controller of the new energy station acts immediately to reduce the active power output, and during the period, the AGC issues the adjustment and increase command (in the opposite direction), and the actual power does not act and is locked correctly.
The test result proves that the dynamic simulation test system provided by the embodiment of the invention is accurate and reliable, can realize performance test and verification of the new energy grid-related device, provides test data for developing the optimization of the operation strategy of the grid-related device, and is beneficial to improving the grid-related performance of the new energy field station.
The embodiment of the invention provides a hardware of a rapid frequency response controller of a new energy field station and a semi-physical simulation test scheme of a dynamic system mathematical model established in MATLAB/Simulink.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing static information and dynamic information data. The network interface of the computer device is used for communicating with an external terminal through a network connection. Which computer program is executed by a processor to carry out the steps in the above-described method embodiments.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the inventive arrangements and is not intended to limit the computing devices to which the inventive arrangements may be applied, as a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, there is also provided a computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the above method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (16)
1. A real-time dynamic simulation test system of a rapid frequency response controller of a new energy station is characterized in that the system is established based on an RT-LAB real-time simulation analysis platform and comprises a hardware circuit of the rapid frequency response controller of the new energy station and a dynamic system mathematical model, wherein the dynamic system mathematical model comprises a new energy station model and a power grid model established in MATLAB/Simulink; the new energy station rapid frequency response controller is interconnected with the dynamic system mathematical model through the I/O physical interface and the MODBUS communication module respectively, and a new energy station rapid frequency response controller frequency step disturbance test, an anti-disturbance performance check and an automatic power generation control coordination test real-time dynamic simulation test are realized.
2. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 1,
the IO physical interface comprises: the analog quantity output interface, the analog quantity input interface, the digital quantity output interface and the digital quantity input interface;
the analog quantity output interface and the digital quantity output interface are respectively used for acquiring analog quantity and judgment mark 0-1 digital quantity output by a dynamic system mathematical model for the rapid frequency response controller of the new energy station; the analog quantity input interface and the digital quantity input interface are used for acquiring analog quantity and judgment mark digital quantity output by the rapid frequency response controller of the new energy station for the dynamic system mathematical model respectively.
3. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 1,
the MODBUS communication module comprises a remote signaling value unit, a remote measuring value unit, a remote regulating value unit and a remote control value unit; wherein the content of the first and second substances,
the remote signaling value unit and the remote measuring value unit are used for acquiring a 0-1 variable and an analog quantity of the rapid frequency response controller of the new energy station for the dynamic system mathematical model respectively; the remote regulating value unit and the remote control value unit are used for collecting a dynamic system mathematical model 0-1 variable and an analog quantity for the rapid frequency response controller of the new energy station respectively.
4. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 3,
and the remote measurement value is an instruction value input to the dynamic system mathematical model by the new energy station rapid frequency response controller through the MODBUS communication module.
5. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 3,
the remote signaling value is a digital quantity input to the dynamic system mathematical model by the new energy station rapid frequency response controller through the MODBUS communication module, and comprises a grid-connected switching value and a controller input state quantity of the new energy station rapid frequency response controller.
6. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 3,
the remote control value is an instruction value input to the rapid frequency response controller of the new energy station by the dynamic system mathematical model through the MODBUS communication module.
7. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 3,
the remote control value is a Boolean variable which is input into the rapid frequency response controller of the new energy station by the dynamic system mathematical model through the MODBUS communication module and used for judging whether the remote control value is used or not.
8. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 1,
when a dynamic system mathematical model is built by using Simulink, a top subsystem needs to be packaged, and the subsystems are named by prefix SM _, SC _ and SS _ respectively; wherein the content of the first and second substances,
the SM _ subsystem is responsible for real-time calculation and network synchronization of a dynamic system mathematical model, and the system only needs to comprise one SM _ subsystem;
when the system realizes distributed processing through multi-core, the dynamic system mathematical model also needs to comprise an SS _ subsystem, and the subsystem comprises a computing unit of the dynamic system mathematical model;
the SC subsystem comprises a basic block for collecting and displaying data and is responsible for monitoring key parameters and curves in the system in real time or processing data communication among subsystems afterwards.
9. The real-time dynamic simulation test system of the fast frequency response controller of the new energy station as claimed in claim 8,
the dynamic simulation test system comprises:
the SM _ system subsystem is used for simulating the topology of the main circuit;
the SS _ ctrol subsystem is used for simulating an IO port and an MODBUS communication module of the new energy station rapid frequency response controller and the RTLAB;
and the SC _ Console subsystem is used for displaying the waveform.
10. A real-time dynamic simulation test method for a fast frequency response controller of a new energy station, which is characterized in that a simulation test is performed based on the system of any one of claims 1 to 9, and comprises the following steps: the method comprises a new energy station rapid frequency response controller frequency step disturbance test, an anti-disturbance performance check and an automatic power generation control coordination test real-time dynamic simulation test.
11. The real-time dynamic simulation test method of the fast frequency response controller of the new energy station as claimed in claim 10,
the frequency step disturbance test comprises the following steps:
the step disturbance is divided into step up disturbance and step down disturbance, the frequency is stepped from 50Hz to 50.20Hz, and the step up disturbance is obtained by continuously recovering to 50Hz for 20 s; the frequency is stepped from 50Hz to 49.80Hz, and the step descending disturbance is realized by continuously recovering to 50Hz for 20 s;
the response time, the active power before the step disturbance and the active power after the step disturbance are analyzed, so that the quick frequency response capability is evaluated.
12. The real-time dynamic simulation test method of the fast frequency response controller of the new energy station as claimed in claim 10,
the anti-disturbance performance verification comprises the following steps:
the test is carried out under the set working condition, a frequency signal generating device is adopted to simulate the high-low voltage ride through transient process of the power grid, the following two kinds of check signals are respectively output, and whether the quick frequency response function of the new energy station malfunctions is detected;
signal 1: selecting a certain phase of the calculated frequency of the rapid frequency response controller of the new energy station, instantly dropping the voltage amplitude to 0%, 20%, 40%, 60% and 80% of rated voltage for 150ms, and completing phase shift for 2 times when the voltage drops and recovers, wherein the phase shift is 60 degrees each time;
signal 2: and selecting three-phase voltage amplitude value instant steps to 115%, 120%, 125% and 130% rated voltage, lasting for 500ms, and finishing 2 phase shifts when the voltage steps and recovers, wherein each phase shift is 60 degrees.
13. The real-time dynamic simulation test method of the fast frequency response controller of the new energy station as claimed in claim 10,
the automatic power generation control coordination test is used for verifying whether the quick frequency response function of the new energy station can be well matched with the secondary frequency modulation command of the dispatching terminal, and is executed in a mode of superposing two commands under a set working condition, namely, the first command completes the response action and issues the second command during the execution period, and the test is carried out for 8 times in combination with frequency disturbance and increased and decreased output.
14. The real-time dynamic simulation test method of the fast frequency response controller of the new energy station as claimed in claim 13,
in the automatic power generation control coordination test process, the test is combined with frequency disturbance and increased and decreased output to carry out the following steps:
step (3-1), the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-2), stepping from 50Hz to 50.20Hz according to 10% of rated capacity + frequency of the secondary frequency modulation station;
step (3-3), the frequency is stepped from 50Hz to 50.20Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-4), stepping the frequency of 10% + of the rated capacity of the secondary frequency modulation delocalization station from 50Hz to 50.20 Hz;
step (3-5), the frequency is stepped from 50Hz to 49.80Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-6), the frequency of 10% + of the rated capacity of the secondary frequency modulation station is stepped from 50Hz to 49.80 Hz;
step (3-7), the frequency is stepped from 50Hz to 49.80Hz + 10% of the rated capacity of the secondary frequency modulation station;
step (3-8), the frequency of 10% + of the rated capacity of the secondary frequency modulation delocalization station is stepped from 50Hz to 49.80 Hz;
where "+" indicates that the two instructions overlap in time.
15. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 10 to 14 when executing the computer program.
16. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 10 to 14.
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