CN113364041B - Power Disturbance Simulation Analysis and Control System - Google Patents

Abstract

A power disturbance simulation analysis and control system provided by this application includes a variety of disturbance generating equipment, disturbance management equipment, sensitive equipment and disturbance teaching system. Corresponding power disturbances can be generated through each disturbance generating equipment. After entering the system, the power disturbance can be dealt with accordingly, and each sensitive device can be simulated in different system states to obtain simulation results, such as no power disturbance, presence of power disturbance, or adding disturbance control equipment for management and other states. This system can integrate the functions of power disturbance generation, control simulation, sensitive equipment response simulation, disturbance management simulation, remote control and detection teaching functions to realize comprehensive simulation of power disturbance and effectively combine with the teaching platform.

Description

Power Disturbance Simulation Analysis and Control System

technical field

The invention relates to the technical field of electric power systems, in particular, to a power disturbance simulation analysis and control system.

Background technique

With the development of economy and social progress, the demand for energy is increasing, and the consumption of primary energy brings a lot of carbon dioxide emissions and environmental pollution problems. Therefore, clean energy plays an increasingly important role in energy supply. At present, wind power generation and photovoltaic power generation occupy an important proportion in my country's power supply, so more and more attention has been paid to the grid-connected research of wind and solar energy.

The power simulation systems currently used are based on traditional energy sources. Most of them are simple in structure and single in function. They cannot effectively analyze the complex situation of new energy grid-connected. The integration capability is relatively weak, and the functions of scientific research and teaching cannot be effectively combined.

SUMMARY OF THE INVENTION

The objects of the present invention include, for example, providing a power disturbance simulation analysis and control system, which can integrate a variety of power simulation devices to realize comprehensive power disturbance simulation.

Embodiments of the present invention can be implemented as follows:

In a first aspect, the present invention provides a power disturbance simulation analysis and control system, including a disturbance simulation system, a sensitive equipment simulation system, a disturbance management system and a disturbance teaching system;

The disturbance simulation system includes a plurality of disturbance generating devices, and each of the disturbance generating devices is used to generate corresponding power disturbances after being connected to the system;

The disturbance management system includes a plurality of disturbance management devices, and each of the disturbance management devices is used for corresponding management of the generated power disturbance after being connected to the system to protect the sensitive device simulation system;

The sensitive device simulation system includes a plurality of sensitive devices, and each of the sensitive devices is used to perform a simulation operation in a variety of different system states, and output a simulation result, wherein the system state includes a state where there is a power disturbance, a state where there is a power The state of disturbance and access to the corresponding disturbance management equipment, the state of no power disturbance and the state of not connected to the disturbance management equipment;

The disturbance teaching system is used to collect and display the operation information of the disturbance simulation system, the sensitive equipment simulation system, and the disturbance management system, and send control information to the disturbance simulation system, the sensitive equipment simulation system, and the disturbance management system.

In an optional embodiment, the plurality of disturbance generating devices include a programmable grid simulator and a nonlinear load simulator;

the programmable grid simulator for generating voltage disturbances;

The nonlinear load simulator is used to generate harmonic disturbances or nonlinear load simulation disturbances.

In an optional embodiment, the plurality of sensitive devices include 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 in a variety of 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 drive simulation unit is used to simulate the operation of the industrial variable frequency motor under various system states.

In an optional embodiment, the wind power generation simulation unit includes a prime mover connected to the city grid and a frequency converter, a first converter, a grid-connected transformer and a first prototype controller connected to the prime mover.

In an optional embodiment, the first prototype controller is used to modify the control code of the first converter;

The system state also includes a state where a power disturbance is present and the control code for the first converter is modified.

In an optional embodiment, the photovoltaic power generation simulation unit includes a photovoltaic power simulation device, and a second converter and a second prototype controller connected to the photovoltaic power simulation device.

In an optional embodiment, the plurality of disturbance treatment devices include a harmonic treatment device, an AC voltage compensation device, and a DC voltage compensation device;

The harmonic control device is connected upstream of each of the sensitive equipment, and is used for control when harmonic disturbance is generated;

The AC voltage compensation device is connected upstream of each of the sensitive devices, and is used for treatment when voltage disturbances are generated;

The direct current voltage compensation device is connected to the variable frequency drive simulation unit, and is used for treatment from the direct current side of the frequency converter when a voltage disturbance is generated.

In an optional embodiment, the system further includes a plurality of disturbance analyzers, and the plurality of disturbance analyzers are arranged at a plurality of different positions of the system for collecting voltage signals and current signals at corresponding positions.

In an optional embodiment, the disturbance teaching system includes a host computer and a teaching platform;

The upper computer is used to collect the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance control system;

The teaching platform is used to display and save the operation information;

The upper computer is further configured to obtain control information based on the operation information or control instructions, and send the control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance management system.

In an optional implementation manner, the teaching platform is further configured to generate a corresponding operation curve based on the operation information;

The upper computer is also used to record the system state to which the received operation information belongs, and to associate the system state and the operation information.

The beneficial effects of the embodiments of the present invention include, for example:

A power disturbance simulation analysis and control system provided by this application includes a variety of disturbance generating equipment, disturbance management equipment, sensitive equipment and disturbance teaching system. Corresponding power disturbances can be generated through each disturbance generating equipment. After entering the system, the power disturbance can be managed accordingly, and each sensitive device can be simulated in different system states to obtain the simulation results, such as no power disturbance, power disturbance, or adding disturbance control equipment for management and other states. This system can integrate the functions of power disturbance generation, control simulation, sensitive equipment response simulation, disturbance management simulation, remote control and detection teaching functions to realize comprehensive simulation of power disturbance and effectively combine with the teaching platform.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a structural block diagram of a power disturbance simulation analysis and control system provided by an embodiment of the application;

2 is another structural block diagram of a power disturbance simulation analysis and control system provided by an embodiment of the application;

3 is a schematic diagram of the connection between a power disturbance simulation analysis and a control system provided by an embodiment of the present application;

Figure 4 is a waveform diagram of the DC bus current of the photovoltaic power generation simulation unit under the sequence sag disturbance;

Figure 5 is a waveform diagram of the DC bus voltage of the photovoltaic power generation simulation unit under the disturbance of sequence sag;

Figure 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 DC voltage waveform diagram of a photovoltaic power generation simulation unit under harmonic disturbance;

Figure 8 is a three-phase current waveform diagram of a photovoltaic power generation simulation unit under harmonic disturbance;

Fig. 9 is a grid voltage waveform diagram of a photovoltaic power generation simulation unit under harmonic disturbance;

Figure 10 is a three-phase current waveform diagram after changing the DC voltage reference value;

Figure 11 is a DC voltage waveform diagram after changing the DC voltage reference value;

Fig. 12 is the reactive power waveform diagram after changing the reactive current reference value;

Figure 13 is a DC voltage waveform diagram after changing the reactive current reference value.

Detailed ways

In order to make the purposes, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation 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.

Please refer to FIG. 1 , which is a structural block diagram of a power disturbance simulation analysis and control system provided by an embodiment of the present application. The system includes disturbance simulation system, sensitive equipment simulation system, disturbance management system and disturbance teaching system.

Please refer to FIG. 2 in combination, wherein the disturbance simulation system includes a plurality of disturbance generating devices, and each disturbance generating device is used to generate a corresponding power disturbance after being connected to the system. The disturbance management system includes multiple disturbance management devices, and each disturbance management device is used to manage the generated power disturbances after being connected to the system to protect the sensitive equipment simulation system.

The sensitive equipment simulation system includes a plurality of sensitive equipment, each sensitive equipment is used for simulating operation under a variety of different system states, and outputting the simulation results. Wherein, the system state includes a state in which power disturbance exists, a state in which there is a power disturbance and a corresponding disturbance management device is connected, and a state in which there is no power disturbance and the disturbance management device is not connected.

For example, when the system is normal and undisturbed, the simulation operation of sensitive equipment is carried out, and the corresponding simulation waveform is output. On this basis, the disturbance generating equipment is connected to the system to generate power disturbance, and the sensitive equipment is simulated under the state of power disturbance, and the corresponding simulated waveform is output. Then, the disturbance control equipment is connected to the system to realize the control of the corresponding power disturbance. In this state, the sensitive equipment is simulated and operated, and the corresponding simulated waveform is output.

The disturbance teaching system is used to collect and display the operation information of the disturbance simulation system, the sensitive equipment simulation system, and the disturbance control system, and send control information to the disturbance simulation system, the sensitive equipment simulation system, and the disturbance control system.

The system provided by this embodiment can integrate the functions of power disturbance generation, control simulation, sensitive equipment response simulation, disturbance management simulation, remote control and detection and teaching functions, realize comprehensive simulation of power disturbance, and be effectively combined with the teaching platform.

Please refer to FIG. 3 , in this embodiment, the multiple disturbance generating devices included in the disturbance simulation system include a programmable power grid simulator and a nonlinear load simulator. The programmable power grid simulator may be an energy feedback programmable power grid simulator, which may be used to generate voltage disturbances, such as voltage sag, voltage deviation, three-phase unbalance, and the like.

The nonlinear load simulator can be connected to or disconnected from the system through a control switch. After the nonlinear load simulator is connected to the system, it can be used to generate harmonic disturbances or nonlinear load simulation disturbances, such as harmonics, current surges, and imbalances.

The sensitive equipment included in the sensitive equipment simulation system may include multiple groups, wherein each group of sensitive equipment includes a wind power generation simulation unit, a photovoltaic power generation simulation unit and a variable frequency drive simulation unit. Among them, the wind power generation simulation unit is used to simulate the operation of the wind turbine in various system states. The photovoltaic power generation simulation unit is used to simulate the operation of photovoltaic generator sets under various system states. The variable frequency drive simulation unit is used to simulate the operation of industrial variable frequency motors in various system states.

During the simulation operation, multiple sensitive devices can be connected to the system at the same time, or they can be connected to the system individually in sequence 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 city grid, a frequency converter, a first converter, a grid-connected transformer and a first prototype controller connected to the prime mover. It can be used to simulate the operation of doubly-fed wind turbines and direct-drive wind turbines.

The photovoltaic power generation simulation unit includes a photovoltaic power supply simulation device, a second converter and a second prototype controller connected with the photovoltaic power supply simulation device.

The variable frequency drive simulation unit can be retrofitted from the prime mover in the wind power generation simulation unit and the frequency converter that controls the prime mover. For example, the connection between the prime mover and the inverter in the wind power generation simulation unit is disconnected, and the prime mover originally connected to the mains is switched to be powered by the AC power grid simulation source through the AC voltage compensation device (DVR).

In this embodiment, the first prototype controller in the wind power generation simulation unit can be used to modify the control code of the first converter to realize the redevelopment function. Thus, in the presence of power disturbances, operating conditions that respond by themselves are simulated. Therefore, for the wind power generation simulation unit, the above-mentioned system state may also include a state after power disturbance exists and the control code of the first converter is modified.

In addition, likewise, the second prototype controller in the photovoltaic power generation simulation unit can modify the control code of the second converter to simulate operating conditions through its own response in the presence of power disturbances. In this way, for the photovoltaic power generation simulation unit, the above-mentioned system state also includes a state after power disturbance exists and the control code of the second converter is modified.

In this embodiment, the multiple treatment devices included in the disturbance treatment system include a harmonic treatment device, an alternating voltage compensation device (DVR) and a direct voltage compensation device (VSP).

Among them, the harmonic control device can be an active power filter (APF), and the harmonic control device is connected to the upstream of each sensitive device for control when harmonic disturbance is generated. The AC voltage compensating device is connected upstream of each sensitive equipment, and is used to control when the voltage disturbance is generated. And the DC voltage compensation device is connected to the variable frequency drive simulation unit, and is used to control from the DC side of the frequency converter when voltage disturbance is generated.

The disturbance teaching system includes a host computer and a teaching platform. The host computer is used to collect the operation information of the disturbance simulation system, the sensitive equipment simulation system and the disturbance control system. The teaching platform is used to display and save the operation information. In addition, the upper computer is also used to obtain control information based on operation information or control instructions, and send the control information to the disturbance simulation system, the sensitive equipment simulation system and the disturbance management system.

The disturbance teaching system can realize the functions of information collection, remote control and teaching display of each equipment in the system.

When implemented, the main function of the teaching platform is to provide students with a display and operation platform, and the teaching platform can be used to generate and display corresponding operation curves based on the collected operation information. Monitor and display the operation of each device. A human-machine interface, a connection interface to other devices, such as a printer, can also be provided so that printing can be performed by sending information to the printer. Students can send relevant control information based on the host computer to control the generation of power disturbances, control the access of management equipment, control the access of sensitive equipment, and modify control codes.

In addition, the host computer can also be used to record the system state to which the received operation information belongs, and associate the system state to which the operation information belongs. The host computer can automatically save the simulation operation data according to the login user and login time, such as all real-time data, status information, fault information, waveform data, etc. Subsequent development and processing can be performed based on the saved data, various curve drawing can be supported, and data can be exported in various formats, such as excel file format.

In addition, the host computer can record various events sequentially, and has the function of accident tracing. It can also realize online statistical calculation of information data, clock synchronization, etc. When a system failure is detected, an alarm signal can be generated to notify relevant personnel.

Through the perturbation teaching system, students can understand the control algorithms such as wind power generation simulation unit, photovoltaic power generation simulation unit, power grid simulator, AC voltage compensation device, DC voltage compensation device, etc. In addition, the control algorithm can be modified, and the modified control algorithm can be loaded into the upper computer to control the related equipment.

The disturbance control equipment used in this embodiment is all industrial equipment, which is applied to laboratory teaching for the first time in this embodiment, so that the teaching can be consistent with the actual situation.

In addition, the system provided by this embodiment may further include a plurality of disturbance analyzers, and the multiple disturbance analyzers are arranged at multiple different positions of the system to collect voltage signals and current signals at corresponding positions. Each disturbance analyzer can send the collected signal to the disturbance teaching system for presentation or feedback. The disturbance analyzer can facilitate the understanding of the overall operating state of the system, which can be used to analyze the influence of voltage disturbance and harmonic disturbance on the system.

Specifically, the disturbance analyzer can realize the collection of various signals, such as the real-time waveforms of voltage and current of each phase of A, B, C, and N; frequency value, voltage RMS value, voltage half-wave RMS value, voltage positive peak value, voltage negative peak value , voltage form factor, current RMS, current half-wave RMS, current positive peak value, current negative peak value, current form factor; active power, reactive power, apparent power, power factor, displacement power factor, active electrical energy, no Power energy, apparent power energy; voltage harmonics, including THD, DC, 1-50th harmonic, 0-49th interharmonic, 1-35th higher harmonic; current harmonics, including THD, DC, KF, 1-50th harmonic, 0-49th interharmonic, 1-35th higher harmonic; harmonic power, including THD, DC, 1-50th 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, unbalance; active, reactive, apparent Power decomposition, line loss power, line loss cost, pollution assessment; event records, including voltage swell, voltage sag, voltage interruption, inrush current, short flicker overrun, long flicker overrun, voltage upper limit, voltage lower limit Limit, frequency upper limit, frequency lower limit, steady-state voltage fluctuation, voltage unbalance limit, voltage THD limit, voltage 1-50th harmonic limit, current 2-50th harmonic limit, and so on.

Based on the system architecture provided in this embodiment, related power disturbance tests, such as tests under voltage disturbances and tests under harmonic disturbances, can be performed. The following describes the procedures of these two tests respectively.

In one embodiment, the response of various sensitive devices under different voltage disturbances, the interactive influence between the sensitive devices, and the governance effect after the disturbance governance device is connected can be tested. The resulting voltage disturbances include voltage sags, voltage deviations, and three-phase unbalance. Wherein, the variable frequency drive simulation unit can be refitted by a group of wind power generation simulation units through the above-mentioned refit method. During the test, the wind power generation simulation unit, the photovoltaic power generation simulation unit and the variable frequency drive simulation unit can be connected individually for testing and observation, or all of them can be connected.

The test process mainly includes the following steps. It should be noted that the execution order of the following steps is not limited and can be adjusted according to the actual test order. limit.

S10. Generate voltage disturbances, such as voltage sags, voltage deviations, or three-phase unbalance, through a programmable grid simulator;

S11. Test and observe each sensitive device, which mainly includes the following sub-steps:

S111A, simulating the operation of the wind power generation simulation unit in the normal system state (no voltage disturbance);

S112A, performing a simulation operation on the wind power generation simulation unit in a system state in which the programmable grid simulator generates voltage disturbance;

S113A, after modifying the converter control code through the prototype controller of the wind power generation simulation unit, the simulation operation is performed;

S114A, connect the disturbance control equipment (AC voltage compensation device and DC voltage compensation device), and perform a simulated operation on the wind power generation simulation unit in the system state in which the disturbance control equipment is connected to control the voltage disturbance.

S111B, simulate the operation of the photovoltaic power generation simulation unit in the normal system state (no voltage disturbance);

S112B. Perform a simulation operation on the photovoltaic power generation simulation unit in a system state in which the programmable grid simulator generates voltage disturbance. If the sag is set to 0.6 through the sequence, the DC bus voltage of the corresponding photovoltaic power generation simulation unit will rise, and the corresponding The voltage waveform is shown in Figure 4. In addition, the grid-side voltage of the photovoltaic power generation simulation unit will rise, and the corresponding current waveform is shown in Figure 5;

S113B, after modifying the converter control code through the prototype controller of the photovoltaic power generation simulation unit, the simulation operation is performed;

S114B, connect the disturbance control equipment (AC voltage compensation device and DC voltage compensation device), and perform a simulated operation on the photovoltaic power generation simulation unit in the system state in which the disturbance control equipment is connected to control the voltage disturbance.

S111C, simulate the operation of the variable frequency drive simulation unit in the normal system state (no voltage disturbance);

S112C, perform a simulation operation on the variable frequency drive simulation unit in a system state where the programmable grid simulator produces voltage disturbance;

S113C, access the disturbance control equipment (AC voltage compensation device and DC voltage compensation device), and perform the simulation operation on the variable frequency drive simulation unit in the system state where the disturbance control equipment is connected to control the voltage disturbance.

S13, each disturbance analyzer collects the voltage signal and the current signal at the corresponding position;

S14, the disturbance teaching platform collects and displays the operation information of each device, and performs remote control on each device.

In another implementation manner, the response of various sensitive devices under different harmonic disturbances, the interactive influence between sensitive devices, and the management after access to the disturbance management device can also be tested based on the system architecture provided in this embodiment. Effect. The resulting harmonic disturbances include harmonics, current surges, and imbalances. Likewise, the variable frequency drive simulation unit can be retrofitted from a group of wind power generation simulation units through the above modification method. During the test, the wind power generation simulation unit, the photovoltaic power generation simulation unit and the variable frequency drive simulation unit can be connected individually for testing and observation, or all of them can be connected. The test process is mainly implemented in the following ways:

S20, the programmable power grid simulator supplies power normally, and various harmonic disturbances (or nonlinear load simulation disturbances) are generated through the nonlinear load simulator;

S21. Test and observe each sensitive device, which mainly includes the following sub-steps:

S211A, simulating the operation of the wind power generation simulation unit under the normal system state (without harmonic disturbance);

S212A, performing a simulation operation on the wind power generation simulation unit in a system state where the nonlinear load simulator produces harmonic disturbance;

S213A, after modifying the converter control code through the prototype controller of the wind power generation simulation unit, the simulation operation is performed;

S214A, access the disturbance control equipment (harmonic control device), and perform the simulation operation on the wind power generation simulation unit in the system state in which the disturbance control equipment is connected to control the harmonic disturbance.

S211B, simulate the operation of the photovoltaic power generation simulation unit in the normal system state (without harmonic disturbance);

S212B. Perform a simulation operation on the photovoltaic power generation simulation unit in a system state in which the nonlinear load simulator generates harmonic disturbance, wherein, under the harmonic disturbance, the reactive power and active power waveforms of the photovoltaic power generation simulation unit are as shown in Figure 6 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, grid voltage L3 are shown in Fig. 9 shown;

S213B, after modifying the converter control code through the prototype controller of the photovoltaic power generation simulation unit, the simulation operation is performed;

Among them, in the case of changing the DC voltage reference value (for example, the outer ring voltage reference value is 345.00), the corresponding waveforms of U-phase current, V-phase current and W-phase current are shown in Figure 10, and the waveform of DC voltage is shown in Figure 10. shown in 11. In the case of changing the reactive current reference value (for example, the reactive current reference value is -1.00), the waveform of the corresponding reactive power is shown in Figure 12, and the waveform of the DC voltage is shown in Figure 13;

S214B, connect the disturbance control equipment (harmonic control device), and perform the simulation operation on the photovoltaic power generation simulation unit in the system state in which the disturbance control equipment is connected to control the harmonic disturbance.

S211C, simulate the operation of the variable frequency drive simulation unit in the normal system state (no harmonic disturbance);

S212C, simulate the operation of the variable frequency drive simulation unit under the system state of harmonic disturbance generated by the nonlinear load simulator;

S213C, connect to the disturbance control equipment (harmonic control device), and perform the simulation operation of the variable frequency drive simulation unit in the system state where the disturbance control equipment is connected to control the harmonic disturbance.

S23, each disturbance analyzer collects the voltage signal and the current signal at the corresponding position;

S24. The disturbance teaching platform collects and displays the operation information of each device, and performs remote control on each device.

The power disturbance simulation analysis and control system provided in this embodiment integrates the functions of power disturbance generation, sensitive equipment response simulation, disturbance management equipment simulation, remote control, and monitoring and teaching functions, and comprehensively covers a variety of disturbance generation equipment, disturbance management equipment, sensitive equipment, etc., and has the functions of self-response testing and interactive testing for sensitive equipment to respond to disturbances. The system can use the actual industrial disturbance control equipment for laboratory teaching, and each equipment in the system is the device of the actual power user.

In addition, the disturbance teaching system has the functions of teaching and development, which can visually display the operation and teaching, and can also re-develop the control algorithm of the sensitive equipment and disturbance generating equipment in the system.

Based on the provided system architecture, the whole process of generating, analyzing and controlling power disturbances in the new energy power system can be tested, which is consistent with the content of various teaching courses and experimental courses in actual teaching, and provides systematic support for course teaching and experimental teaching. .

To sum up, the embodiments of the present application provide a power disturbance simulation analysis and control system, including a variety of disturbance generating equipment, disturbance management equipment, sensitive equipment, and disturbance teaching system, and corresponding power disturbances can be generated through each disturbance generating equipment, After each disturbance management device is connected to the system, the power disturbance can be managed accordingly, and each sensitive device can be simulated in different system states to obtain the simulation results, such as no power disturbance, presence of power disturbance, or adding disturbance management equipment for management, etc. various states. This system can integrate the functions of power disturbance generation, control simulation, sensitive equipment response simulation, disturbance management simulation, remote control and detection teaching functions to realize comprehensive simulation of power disturbance and effectively combine with the teaching platform.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the 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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