CN113364041B - Electric power disturbance simulation analysis and control system - Google Patents
Electric power disturbance simulation analysis and control system Download PDFInfo
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- CN113364041B CN113364041B CN202110905683.5A CN202110905683A CN113364041B CN 113364041 B CN113364041 B CN 113364041B CN 202110905683 A CN202110905683 A CN 202110905683A CN 113364041 B CN113364041 B CN 113364041B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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Abstract
The application provides a power disturbance simulation analysis and control system, including multiple disturbance emergence equipment, disturbance treatment equipment, sensitive equipment and disturbance teaching system, can produce corresponding power disturbance through each disturbance emergence equipment, each disturbance treatment equipment can carry out corresponding management to power disturbance after the access system, and each sensitive equipment can simulate the operation and obtain the simulation result in the system state of difference, if there is not power disturbance, there is power disturbance or add multiple states such as that disturbance treatment equipment administers. The system can integrate the functions of generating power disturbance, simulating control, simulating response of sensitive equipment, simulating disturbance treatment, remote control and detection teaching, realize comprehensive simulation of power disturbance, and effectively combine with a teaching platform.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a power disturbance simulation analysis and control system.
Background
With the development of economy and the progress of society, the demand for energy is increasing, and the consumption of primary energy brings about the problems of large carbon dioxide emission and environmental pollution, so the position of clean energy in energy supply is more and more important. At present, wind power generation and photovoltaic power generation have an important proportion in power supply in China, so that grid connection research on wind and light energy sources is more and more emphasized.
The electric power simulation system used at present is constructed based on traditional energy, most of the electric power simulation systems are simple in structure and single in function, effective analysis can not be carried out on complex conditions of new energy grid connection, the integration capability is weak, and scientific research and teaching functions can not be effectively combined.
Disclosure of Invention
The invention aims to provide a power disturbance simulation analysis and control system, which can integrate various power simulation devices and realize comprehensive simulation of power disturbance.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a power disturbance simulation analysis and control system, which comprises a disturbance simulation system, a sensitive equipment simulation system, a disturbance treatment system and a disturbance teaching system;
the disturbance simulation system comprises a plurality of disturbance generating devices, and each disturbance generating device is used for generating corresponding electric power disturbance after being accessed into the system;
the disturbance treatment system comprises a plurality of disturbance treatment devices, and each disturbance treatment device is used for correspondingly treating the generated power disturbance after being accessed into the system so as to protect the sensitive equipment simulation system;
the sensitive equipment simulation system comprises a plurality of sensitive equipment, and each sensitive equipment is used for performing simulation operation under a plurality of different system states and outputting a simulation result, wherein the system states comprise a state with electric power disturbance, a state with electric power disturbance and accessed to corresponding disturbance treatment equipment, and a state without electric power disturbance and not accessed to the disturbance treatment equipment;
the disturbance teaching system is used for acquiring and displaying the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system, and sending control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system.
In an alternative embodiment, the plurality of disturbance generating devices comprises a programmable grid simulator and a non-linear load simulator;
the programmable power grid simulator is used for generating voltage disturbance;
the nonlinear load simulator is used for generating harmonic disturbance or nonlinear load simulation disturbance.
In an alternative embodiment, the plurality of sensitive devices comprise a wind power generation simulation unit, a photovoltaic power generation simulation unit and a variable frequency drive simulation unit;
the wind power generation simulation unit is used for simulating the operation of the wind turbine generator in various different system states;
the photovoltaic power generation simulation unit is used for simulating the operation of the photovoltaic generator set in various different system states;
the variable-frequency driving simulation unit is used for simulating the operation of the industrial variable-frequency motor in various different system states.
In an alternative embodiment, the wind power generation simulation unit comprises a prime mover connected to the utility grid, and a frequency converter, a first converter, a grid-connected transformer and a first prototype controller connected to the prime mover.
In an alternative embodiment, the first prototype controller is configured to modify a control code of the first converter;
the system states also include a state in which there is a power disturbance and a control code for the first converter is modified.
In an alternative embodiment, the photovoltaic power generation simulation unit comprises a photovoltaic power simulation device, and a second converter and a second prototype controller which are connected with the photovoltaic power simulation device.
In an alternative embodiment, the plurality of disturbance management devices comprises a harmonic management device, an alternating voltage compensation device and a direct voltage compensation device;
the harmonic suppression device is connected to the upstream of each sensitive device and is used for performing suppression when harmonic disturbance is generated;
the alternating voltage compensation device is connected to the upstream of each sensitive device and is used for treating when voltage disturbance is generated;
and the direct-current voltage compensation device is connected to the variable-frequency drive analog unit and is used for controlling the direct-current side of the frequency converter when voltage disturbance is generated.
In an alternative embodiment, the system further comprises a plurality of disturbance analyzers disposed at a plurality of different locations of the system for acquiring voltage and current signals at the respective locations.
In an optional embodiment, the disturbance teaching system comprises an upper computer and a teaching platform;
the upper computer is used for acquiring the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system;
the teaching platform is used for displaying and storing the operation information;
and the upper computer is also used for obtaining control information based on the operation information or the control instruction and sending the control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system.
In an optional embodiment, the teaching platform is further configured to generate a corresponding operation curve based on the operation information;
and the upper computer is also used for recording the system state of the received running information and associating the system state with the running information.
The beneficial effects of the embodiment of the invention include, for example:
the application provides a power disturbance simulation analysis and control system, including multiple disturbance emergence equipment, disturbance treatment equipment, sensitive equipment and disturbance teaching system, can produce corresponding power disturbance through each disturbance emergence equipment, each disturbance treatment equipment can carry out corresponding management to power disturbance after the access system, and each sensitive equipment can simulate the operation and obtain the simulation result in the system state of difference, if there is not power disturbance, there is power disturbance or add multiple states such as that disturbance treatment equipment administers. The system can integrate the functions of generating power disturbance, simulating control, simulating response of sensitive equipment, simulating disturbance treatment, remote control and detection teaching, realize comprehensive simulation of power disturbance, and effectively combine with a teaching platform.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a power disturbance simulation analysis and control system according to an embodiment of the present disclosure;
fig. 2 is another block diagram of a power disturbance simulation analysis and control system according to an embodiment of the present disclosure;
FIG. 3 is a schematic connection diagram of a power disturbance simulation analysis and control system according to an embodiment of the present disclosure;
FIG. 4 is a diagram of DC bus current waveforms of a photovoltaic power generation simulation unit under sequence sag disturbance;
FIG. 5 is a voltage waveform diagram of a DC bus of a photovoltaic power generation simulation unit under sequence sag disturbance;
FIG. 6 is a waveform diagram of reactive power and active power of a photovoltaic power generation simulation unit under harmonic disturbance;
FIG. 7 is a diagram of DC voltage waveforms of a photovoltaic power generation simulation unit under harmonic disturbance;
FIG. 8 is a three-phase current waveform diagram of the photovoltaic power generation simulation unit under harmonic disturbance;
FIG. 9 is a voltage waveform diagram of a grid of a photovoltaic power generation simulation unit under harmonic disturbance;
FIG. 10 is a three-phase current waveform diagram after changing DC voltage reference values;
FIG. 11 is a diagram of DC voltage waveforms after changing the DC voltage reference;
FIG. 12 is a graph of reactive power waveforms after changing the reactive current reference;
fig. 13 is a diagram of a dc voltage waveform after changing a reactive current reference value.
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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the features in the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, a block diagram of a power disturbance simulation analysis and control system according to an embodiment of the present disclosure is shown. The system comprises a disturbance simulation system, a sensitive equipment simulation system, a disturbance treatment system and a disturbance teaching system.
Referring to fig. 2, the disturbance simulation system includes a plurality of disturbance generating devices, each of which is configured to generate a corresponding power disturbance after accessing the system. And the disturbance treatment system comprises a plurality of disturbance treatment devices, and each disturbance treatment device is used for correspondingly treating the generated power disturbance after being accessed into the system so as to protect the sensitive equipment simulation system.
The sensitive equipment simulation system comprises a plurality of sensitive equipment, and each sensitive equipment is used for carrying out simulation operation under various different system states and outputting a simulation result. The system state comprises a state with power disturbance, a state with power disturbance and accessed to corresponding disturbance treatment equipment, and a state without power disturbance and not accessed to the disturbance treatment equipment.
For example, under the condition that the system is normal and has no disturbance, the simulation operation of the sensitive equipment is carried out, and a corresponding simulation waveform is output. On the basis, the disturbance generating equipment is accessed into the system to generate power disturbance, the sensitive equipment is subjected to simulation operation in the power disturbance state, and a corresponding simulation waveform is output. And then, accessing the disturbance treatment equipment into the system to realize the treatment of corresponding power disturbance, carrying out the simulation operation of the sensitive equipment in the state, and outputting a corresponding simulation waveform.
And the disturbance teaching system is used for acquiring and displaying the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system, and sending control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system.
The system that this embodiment provided can collect the production of electric power disturbance, control simulation, sensitive equipment response simulation, disturbance treatment simulation, remote control and detection teaching function in an organic whole, realize the comprehensive simulation of electric power disturbance, and effectively combine with the teaching platform.
Referring to fig. 3, in the present embodiment, the disturbance simulation system includes a plurality of disturbance generating devices including a programmable grid simulator and a nonlinear load simulator. The programmable grid simulator may be an energy feedback type programmable grid simulator, and may be configured to generate a voltage disturbance, such as a voltage sag, a voltage deviation, a three-phase imbalance, or the like.
The nonlinear load simulator can be switched in or switched out of the system through the control switch. After the nonlinear load simulator is connected into the system, the nonlinear load simulator can be used for generating harmonic disturbance or nonlinear load simulation disturbance, such as harmonic, current surge, unbalance and the like.
The sensitive equipment simulation system comprises a plurality of groups of sensitive equipment, wherein each group of sensitive equipment comprises a wind power generation simulation unit, a photovoltaic power generation simulation unit and a variable frequency drive simulation unit. The wind power generation simulation unit is used for simulating the operation of the wind turbine generator in various different system states. The photovoltaic power generation simulation unit is used for simulating the operation of the photovoltaic generator set under various different system states. The variable-frequency driving simulation unit is used for simulating the operation of the industrial variable-frequency motor in various different system states.
During the simulation operation, a plurality of sensitive devices can be simultaneously accessed into the system, and can also be sequentially and independently accessed into the system to perform the simulation operation of the corresponding sensitive devices.
In this embodiment, the wind power generation simulation unit includes a prime mover connected to the utility grid, and a frequency converter, a first converter, a grid-connected transformer, and a first prototype controller connected to the prime mover. The method can be used for simulating the operation of the double-fed wind turbine generator and the direct-drive wind turbine generator.
The photovoltaic power generation simulation unit comprises a photovoltaic power supply simulation device, and a second converter and a second prototype controller which are connected with the photovoltaic power supply simulation device.
The variable-frequency drive simulation unit can be formed by modifying a prime motor in the wind power generation simulation unit and a frequency converter for controlling the prime motor. For example, the connection between the prime mover and the frequency converter in the wind power generation analog unit is disconnected, and the prime mover originally connected to the commercial power is switched to be supplied with power from the ac grid analog source through the ac voltage compensation Device (DVR).
In this embodiment, the first prototype controller in the wind power generation simulation unit may be used to modify the control code of the first converter, so as to implement a redevelopment function. Thereby simulating operating conditions by itself in the presence of an electrical disturbance. Thus, for a wind power generation simulation unit, the above-mentioned system states may also include a state in which there is a power disturbance and the control code of the first converter is modified.
Furthermore, likewise, the second prototype controller in the photovoltaic power generation simulation unit may modify the control code of the second converter, simulating the operating conditions by itself in the presence of a power disturbance. In this way, for the photovoltaic power generation simulation unit, the system state further includes a state in which the power disturbance exists and the control code of the second converter is modified.
In this embodiment, the disturbance treatment system comprises a plurality of treatment devices including a harmonic treatment device, an alternating current voltage compensation Device (DVR) and a direct current voltage compensation device (VSP).
The harmonic suppression device can be an Active Power Filter (APF), and is connected to the upstream of each sensitive device and used for performing suppression when harmonic disturbance is generated. The alternating voltage compensation device is connected to the upstream of each sensitive device and is used for treating when voltage disturbance is generated. And the direct current voltage compensation device is connected to the variable frequency drive analog unit and is used for controlling the direct current side of the frequency converter when voltage disturbance is generated.
The disturbance teaching system comprises an upper computer and a teaching platform, wherein the upper computer is used for collecting operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system, and the teaching platform is used for displaying and storing the operation information. In addition, the upper computer is also used for obtaining control information based on the operation information or the control instruction and sending the control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system.
The disturbance teaching system can realize the functions of information acquisition, remote control, teaching display and the like of each device in the system.
During implementation, the teaching platform mainly functions to provide a display and operation platform for students, and the teaching platform can be used for generating corresponding operation curves based on the collected operation information and displaying the operation curves. And monitoring the operation of each device and displaying pictures. A man-machine interface, a connection interface to other devices, such as a printer, may also be provided so that printing can be performed by sending information to the printer. The students can send related control information based on the upper computer to control the generation of power disturbance, the access of treatment equipment, the access of sensitive equipment, the modification of control codes and other operations.
In addition, the upper computer can be used for recording the system state of the received operation information and associating the system state with the operation information. The upper computer can automatically store simulation operation data, such as all real-time data, state information, fault information, waveform data and the like according to the login user and the login time. The secondary development processing can be carried out subsequently based on the stored data, various curve drawing can be supported, and the data can be exported in various different formats, such as an excel document format.
In addition, the upper computer can carry out the order record to all kinds of events, possesses the function of traceing back of accident. And the online statistical calculation, clock synchronization and the like of the information data can be realized. Upon detection of a system failure, an alarm signal may be generated to notify the relevant personnel.
Through the disturbance teaching system, students can know control algorithms of a wind power generation simulation unit, a photovoltaic power generation simulation unit, a power grid simulator, an alternating voltage compensation device, a direct voltage compensation device and the like. And moreover, the control algorithm can be modified, and the modified control algorithm is loaded to the upper computer to control the related equipment.
Disturbance treatment equipment adopted in the embodiment is industrial equipment, and the disturbance treatment equipment is applied to laboratory teaching in the embodiment for the first time, so that the teaching can be consistent with the practice.
In addition, the system provided by the embodiment may further include a plurality of disturbance analyzers, which are disposed at a plurality of different positions of the system, for acquiring the voltage signals and the current signals at the corresponding positions. Each disturbance analyzer can send the acquired signal to a disturbance teaching system for display or as a feedback basis. The disturbance analyzer can be used for conveniently knowing the overall operation state of the system and analyzing the influence of voltage disturbance and harmonic disturbance on the system.
In particular, the disturbance analyzer can realize the acquisition of various signals, such as A, B, C, N real-time waveforms of voltage current of each phase; frequency value, voltage effective value, voltage half-wave effective value, voltage positive peak value, voltage negative peak value, voltage waveform factor, current effective value, current half-wave effective value, current positive peak value, current negative peak value and current waveform factor; active power, reactive power, apparent power, power factor, displacement power factor, active electric energy, reactive electric energy and apparent power electric energy; voltage harmonics including THD, DC, 1-50 harmonics, 0-49 harmonics, 1-35 higher harmonics; current harmonics including THD, DC, KF, 1-50 harmonics, 0-49 harmonics, 1-35 higher harmonics; harmonic power, including THD, DC, 1-50 harmonic power; PST (short flicker), PLT (long flicker); three-phase unbalance including positive sequence voltage, positive sequence current, negative sequence voltage, negative sequence current, zero sequence voltage, zero sequence current and unbalance degree; active power, reactive power, apparent power decomposition, line loss power, line loss cost and pollution assessment; event records include voltage ramp up, voltage ramp down, voltage interruption, inrush current, short flicker violation, long flicker violation, upper voltage violation, lower voltage violation, upper frequency violation, lower frequency violation, steady state voltage fluctuation, voltage imbalance violation, voltage THD violation, voltage 1-50 harmonic violation, current 2-50 harmonic violation, and the like.
Based on the system architecture provided by this embodiment, relevant power disturbance tests, such as a test under voltage disturbance and a test under harmonic disturbance, can be performed, and the flow of the two tests is described below.
In one embodiment, the response of various sensitive devices under different voltage disturbances, the interaction influence among the sensitive devices and the treatment effect after the disturbance treatment devices are connected can be tested. The generated voltage disturbances include voltage sags, voltage deviations, three-phase imbalances, and the like. The variable-frequency driving simulation unit can be formed by modifying a group of wind power generation simulation units in a modification mode. During testing, the wind power generation simulation unit, the photovoltaic power generation simulation unit and the variable frequency drive simulation unit can be independently accessed to carry out test observation, and can also be completely accessed.
The test flow mainly includes the following steps, it should be noted that the execution sequence of the following steps is not limited, and may be adjusted according to the actual test sequence, for example, the following steps may be executed in parallel, or may be executed after adjusting the front-back sequence, and is not limited specifically.
S10, generating voltage disturbance such as voltage sag, voltage deviation or three-phase imbalance and the like through a programmable power grid simulator;
s11, carrying out test observation on each sensitive device, and mainly comprising the following sub-steps:
S111A, carrying out simulation operation on the wind power generation simulation unit in a normal system state (without voltage disturbance);
S112A, carrying out simulation operation on the wind power generation simulation unit under the system state that the programmable grid simulator generates voltage disturbance;
S113A, modifying the control codes of the converter through the prototype controller of the wind power generation simulation unit, and performing simulation operation;
S114A, connecting disturbance treatment equipment (an alternating current voltage compensation device and a direct current voltage compensation device), and performing simulation operation on the wind power generation simulation unit in a system state that the disturbance treatment equipment is connected to treat voltage disturbance.
S111B, carrying out simulation operation on the photovoltaic power generation simulation unit in a normal system state (without voltage disturbance);
S112B, performing simulation operation on the photovoltaic power generation simulation units in a system state where the programmable grid simulator generates voltage disturbance, where if a sag of 0.6 is set in sequence, the dc bus voltage of the corresponding photovoltaic power generation simulation unit will rise, and the corresponding voltage waveform is as shown in fig. 4, and in addition, the grid-side voltage of the photovoltaic power generation simulation unit will rise, and the corresponding current waveform is as shown in fig. 5;
S113B, modifying the control codes of the converter through the prototype controller of the photovoltaic power generation simulation unit, and performing simulation operation;
S114B, connecting disturbance treatment equipment (an alternating current voltage compensation device and a direct current voltage compensation device), and performing simulation operation on the photovoltaic power generation simulation unit in a system state that the disturbance treatment equipment is connected to treat voltage disturbance.
S111C, carrying out simulation operation on the variable-frequency driving simulation unit in a normal system state (without voltage disturbance);
S112C, carrying out simulation operation on the variable-frequency drive simulation unit in a system state that the programmable grid simulator generates voltage disturbance;
S113C, accessing disturbance treatment equipment (an alternating current voltage compensation device and a direct current voltage compensation device), and performing simulation operation on the variable frequency drive simulation unit in a system state that the disturbance treatment equipment is accessed to treat voltage disturbance.
S13, collecting voltage signals and current signals at corresponding positions by each disturbance analyzer;
and S14, the disturbance teaching platform collects and displays the operation information of each device, and the devices are remotely controlled.
In another implementation manner, the system architecture provided by the embodiment may also be used to test responses of various sensitive devices under different harmonic disturbances, interaction influences among the sensitive devices, and treatment effects after the disturbance treatment devices are accessed. The generated harmonic disturbances include harmonics, current surges, imbalances, and the like. Similarly, the variable-frequency drive simulation unit can be formed by modifying a group of wind power generation simulation units in the modifying way. During testing, the wind power generation simulation unit, the photovoltaic power generation simulation unit and the variable frequency drive simulation unit can be independently accessed to carry out test observation, and can also be completely accessed. The test process is mainly realized by the following modes:
s20, the programmable grid simulator supplies power normally, and various harmonic disturbances (or nonlinear load simulation disturbances) are generated through the nonlinear load simulator;
s21, carrying out test observation on each sensitive device, and mainly comprising the following sub-steps:
S211A, carrying out simulation operation on the wind power generation simulation unit in a normal system state (without harmonic disturbance);
S212A, carrying out simulation operation on the wind power generation simulation unit under the system state that the nonlinear load simulator generates harmonic disturbance;
S213A, modifying the control code of the converter through the prototype controller of the wind power generation simulation unit, and performing simulation operation;
s214, 214A, disturbance treatment equipment (harmonic treatment device) is accessed, and the wind power generation simulation unit is subjected to simulation operation in a system state that the disturbance treatment equipment is accessed to treat harmonic disturbance.
S211B, carrying out simulation operation on the photovoltaic power generation simulation unit in a normal system state (without harmonic disturbance);
S212B, performing simulation operation on the photovoltaic power generation simulation unit in a system state that the nonlinear load simulator generates harmonic disturbance, wherein under the harmonic disturbance, the waveforms of reactive power and active power of the photovoltaic power generation simulation unit are shown in FIG. 6, the waveforms of direct current voltage are shown in FIG. 7, the waveforms of U-phase current, V-phase current and W-phase current are shown in FIG. 8, and the waveforms of grid voltage L1, grid voltage L2 and grid voltage L3 are shown in FIG. 9;
S213B, modifying the control codes of the converter through the prototype controller of the photovoltaic power generation simulation unit, and performing simulation operation;
in the case of changing the dc voltage reference value (e.g., the outer loop voltage reference value is 345.00), the waveforms of the corresponding U-phase current, V-phase current, and W-phase current are as shown in fig. 10, and the waveform of the dc voltage is as shown in fig. 11. In the case of changing the reactive current reference value (e.g., -1.00), the corresponding reactive power has a waveform as shown in fig. 12, and the dc voltage has a waveform as shown in fig. 13;
S214B, accessing disturbance treatment equipment (harmonic treatment device), and performing simulation operation on the photovoltaic power generation simulation unit in a system state that the disturbance treatment equipment is accessed to treat harmonic disturbance.
S211C, carrying out simulation operation on the variable-frequency driving simulation unit in a normal system state (without harmonic disturbance);
S212C, carrying out simulation operation on the variable-frequency drive simulation unit under the system state that the nonlinear load simulator generates harmonic disturbance;
and S213C, accessing disturbance treatment equipment (harmonic treatment device), and performing simulation operation on the variable-frequency drive simulation unit in a system state that the harmonic disturbance is treated by the access disturbance treatment equipment.
S23, collecting voltage signals and current signals at corresponding positions by each disturbance analyzer;
and S24, the disturbance teaching platform collects and displays the operation information of each device, and the devices are remotely controlled.
The power disturbance simulation analysis and control system provided by the embodiment integrates the functions of power disturbance generation, sensitive equipment response simulation, disturbance treatment equipment simulation, remote control and monitoring teaching, comprehensively covers various disturbance generation equipment, disturbance treatment equipment, sensitive equipment and the like, and has the self-response test and interaction test functions of the sensitive equipment for responding to disturbance. The system can be used for the laboratory teaching of actual industrial disturbance treatment equipment, and each equipment in the system is a device of an actual power consumer.
In addition, the disturbance teaching system has the teaching and developing functions, can visually display operation and teaching, and can be used for carrying out control algorithm redevelopment on sensitive equipment, disturbance generating equipment and the like in the system.
Based on the provided system architecture, the generation, analysis and control of the power disturbance in the new energy power system are completed, the test is in accordance with the content of each teaching course and each experimental course in the actual teaching, and the system support is provided for course teaching, experimental teaching and the like.
To sum up, the embodiment of the present application provides an electric power disturbance simulation analysis and control system, including multiple disturbance generating device, disturbance treatment device, sensitive device and disturbance teaching system, can produce corresponding electric power disturbance through each disturbance generating device, and each disturbance treatment device can carry out corresponding treatment to electric power disturbance after the access system, and each sensitive device can carry out the simulation operation in different system states and obtain the simulation result, if there is not electric power disturbance, there is electric power disturbance or add disturbance treatment device and administer multiple states such as. The system can integrate the functions of generating power disturbance, simulating control, simulating response of sensitive equipment, simulating disturbance treatment, remote control and detection teaching, realize comprehensive simulation of power disturbance, and effectively combine with a teaching platform.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A power disturbance simulation analysis and control system is characterized by comprising a disturbance simulation system, a sensitive equipment simulation system, a disturbance treatment system and a disturbance teaching system;
the disturbance simulation system comprises a plurality of disturbance generating devices, and each disturbance generating device is used for generating corresponding electric power disturbance after being accessed into the system;
the disturbance treatment system comprises a plurality of disturbance treatment devices, each disturbance treatment device is connected into the system or disconnected from the system through a corresponding switch, and each disturbance treatment device is used for correspondingly treating the generated power disturbance after being connected into the system so as to protect the sensitive device simulation system;
the sensitive equipment simulation system comprises a plurality of sensitive equipment, and each sensitive equipment is used for performing simulation operation under a plurality of different system states and outputting a simulation result, wherein the system states comprise a state with electric power disturbance, a state with electric power disturbance and accessed to corresponding disturbance treatment equipment, and a state without electric power disturbance and not accessed to the disturbance treatment equipment;
the disturbance teaching system is used for acquiring and displaying the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system, and sending control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system;
the multiple sensitive devices comprise a wind power generation simulation unit, a photovoltaic power generation simulation unit and a variable frequency drive simulation unit, and the multiple disturbance treatment devices comprise a harmonic treatment device, an alternating voltage compensation device and a direct voltage compensation device;
the harmonic suppression device is connected to the upstream of each sensitive device and is used for performing suppression when harmonic disturbance is generated;
the alternating voltage compensation device is connected to the upstream of each sensitive device and is used for treating when voltage disturbance is generated;
the direct-current voltage compensation device is connected to the variable-frequency drive analog unit and is used for controlling the direct-current side of the frequency converter when voltage disturbance is generated;
the wind power generation simulation unit comprises a prime motor connected to a city grid, a frequency converter, a first converter, a grid-connected transformer and a first prototype controller, wherein the frequency converter, the first converter, the grid-connected transformer and the first prototype controller are connected with the prime motor;
the first prototype controller is used for modifying the control codes of the first converter, and the system state further comprises a state in which power disturbance exists and the control codes of the first converter are modified; the photovoltaic power generation simulation unit comprises a photovoltaic power supply simulation device, and a second converter and a second prototype controller which are connected with the photovoltaic power supply simulation device;
the second prototype controller is configured to modify the control code of the second converter, and the system state further includes a state in which the power disturbance is present and the control code of the second converter is modified.
2. The power disturbance simulation analysis and control system of claim 1, wherein the plurality of disturbance generating devices comprises a programmable grid simulator and a nonlinear load simulator;
the programmable power grid simulator is used for generating voltage disturbance;
the nonlinear load simulator is used for generating harmonic disturbance or nonlinear load simulation disturbance.
3. The power disturbance simulation analysis and control system of claim 2,
the wind power generation simulation unit is used for simulating the operation of the wind turbine generator in various different system states;
the photovoltaic power generation simulation unit is used for simulating the operation of the photovoltaic generator set in various different system states;
the variable-frequency driving simulation unit is used for simulating the operation of the industrial variable-frequency motor in various different system states.
4. The power disturbance simulation analysis and control system of claim 1, wherein the system further comprises a plurality of disturbance analyzers disposed at a plurality of different locations of the system for acquiring voltage and current signals at the respective locations.
5. The electric power disturbance simulation analysis and control system of claim 1, wherein the disturbance teaching system comprises an upper computer and a teaching platform;
the upper computer is used for acquiring the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system;
the teaching platform is used for displaying and storing the operation information;
and the upper computer is also used for obtaining control information based on the operation information or the control instruction and sending the control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance treatment system.
6. The power disturbance simulation analysis and control system of claim 5, wherein the teaching platform is further configured to generate a corresponding operating curve based on the operating information;
and the upper computer is also used for recording the system state of the received running information and associating the system state with the running information.
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