CN113189957A - System and method for testing plug-in energy Internet networking controller - Google Patents
System and method for testing plug-in energy Internet networking controller Download PDFInfo
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Abstract
The invention discloses a system and a method for testing an immediate plug-in type energy Internet networking controller, wherein the system comprises the following steps: the monitoring system end is used for starting a test program and sending a test demand signal to the real-time simulation test system end; analyzing the received power data to determine the performance of the monitored controller; the real-time simulation test system end is used for simulating the running state of the power grid and the power generation state of the distributed energy according to the test demand signal, determining a power test demand signal according to the simulated running state of the power grid and the power generation state of the distributed energy and sending the power test demand signal to the test control system end; the power control system is used for acquiring power data of interaction between the distributed energy grid-connected system and a simulation power grid according to the power control signal and sending the power data to a monitoring system end; and the tested control system end is used for receiving the control request sent by the real-time simulation test system end according to the power test demand signal and sending a power control signal to a grid-connected system of the real-time simulation test system end.
Description
Technical Field
The invention relates to the technical field of simulation tests, in particular to a system and a method for testing an plug-in type energy Internet networking controller.
Background
With the construction of energy internet, more power electronic devices such as photovoltaic inverters, energy storage inverters and the like are connected to a power grid. Although these devices are subjected to the model test, the model test can only detect some external characteristics of the device, and cannot check the control performance. The working condition of the power electronic equipment is mainly determined by the performance of the controller, if the performance of the controller does not reach the standard, a large amount of harmonic waves are injected into a power grid by the power electronic equipment, the problems of voltage fluctuation, three-phase imbalance and the like are caused, and the power grid faults are caused after unqualified equipment reaches a certain number.
Therefore, a method for testing a grid-connected controller quickly and efficiently is needed.
Disclosure of Invention
The invention provides a system and a method for testing a grid-connected controller of an instant-plugging energy Internet, which aim to solve the problem of how to test the grid-connected controller quickly and efficiently.
In order to solve the above problem, according to an aspect of the present invention, there is provided a system for testing a plug-in energy internet controller, the system including:
the monitoring system end is used for starting a test program and sending a test demand signal to the real-time simulation test system end; analyzing the received power data to determine the performance of the monitored controller;
the real-time simulation test system end is used for simulating the running state of the power grid and the power generation state of the distributed energy sources according to the test demand signal, determining a power test demand signal according to the simulated running state of the power grid and the power generation state of the distributed energy sources, and sending the power test demand signal to the test control system end; the power control system is used for acquiring power data of interaction between the distributed energy grid-connected system and a simulation power grid according to the power control signal and sending the power data to a monitoring system end;
and the tested control system end is used for receiving the control request sent by the real-time simulation test system end according to the power test demand signal and sending a power control signal to a grid-connected system of the real-time simulation test system end.
Preferably, the analyzing the received power data to determine the performance of the measured controller includes:
determining power control precision, power overshoot and response time according to the power data;
if the power control precision meets the rated power which is less than or equal to the multiple of the first preset percentage threshold, determining that the power control precision meets the requirement;
if the power overshoot capacity meets the rated power with the maximum deviation of the active power being less than or equal to the second preset percentage threshold multiple and the rated power with the maximum deviation of the reactive power being less than or equal to the third preset percentage threshold multiple, determining that the power overshoot meets the requirement;
and if the response time is less than or equal to a preset power value response time threshold value, determining that the response time meets the requirement.
Preferably, the real-time simulation test system terminal includes:
the real-time simulator is used for simulating and generating the actual running state of the power grid and the power generation state of the distributed energy according to the test demand signal;
the signal conditioning board card is respectively connected with the real-time simulator and the end of the measured control system and is used for denoising the analog signal interacted with the end of the measured control system;
wherein, the real-time simulation machine is the core of the real-time simulation test system end, and the hardware part includes: CPU and peripheral circuit, FPGA and peripheral circuit; the running state of the power grid is simulated in a CPU of the real-time simulation equipment, and the power generation state of the distributed energy is simulated in the FPGA; the semi-physical simulation system takes a primary side inductor of the grid-connected transformer as a decoupling element, a primary side model of the grid-connected transformer runs on a CPU, and a secondary side model of the grid-connected transformer runs on a field programmable gate array FPGA.
Preferably, wherein the system further comprises: an opto-electric converter and a power amplifier; wherein,
the photoelectric converter is respectively connected with the measured controller and the power amplifier and is used for realizing the interaction of analog signals and digital signals with the measured controller;
and the power amplifier is used for amplifying the transmitted control signal.
Preferably, wherein the system further comprises:
and the data transmission module is used for transmitting the switching signals of each controlled module of the grid-connected inverter, which are sent by the monitored controller, to the real-time simulation equipment through corresponding data links, and simultaneously performing signal conversion on the controller which needs to communicate through optical fibers by configuring a corresponding photoelectric conversion box.
According to another aspect of the present invention, there is provided a method for testing a plug-in energy internet controller, the method including:
the monitoring system end executes the test program and sends a test demand signal to the real-time simulation test system end;
the real-time simulation test system end simulates the running state of a power grid and the power generation state of the distributed energy according to the test demand signal, determines a power test demand signal according to the simulated running state of the power grid and the power generation state of the distributed energy, and sends the power test demand signal to the monitored control system end;
the tested control system end receives a control request sent by the real-time simulation test system end according to the power test demand signal by using a tested controller, and sends a power control signal to a grid-connected system of the real-time simulation test system end;
the real-time simulation test system end acquires power data of interaction between the distributed energy grid-connected system and a simulation power grid according to the power control signal and sends the power data to the monitoring system end;
and the monitoring system end analyzes the power data to determine the performance of the measured controller.
Preferably, the analyzing the received power data by the monitoring system end to determine the performance of the measured controller includes:
determining power control precision, power overshoot and response time according to the power data;
if the power control precision meets the rated power which is less than or equal to the multiple of the first preset percentage threshold, determining that the power control precision meets the requirement;
if the power overshoot capacity meets the rated power with the maximum deviation of the active power being less than or equal to the second preset percentage threshold multiple and the rated power with the maximum deviation of the reactive power being less than or equal to the third preset percentage threshold multiple, determining that the power overshoot meets the requirement;
and if the response time is less than or equal to a preset power value response time threshold value, determining that the response time meets the requirement.
Preferably, wherein the method further comprises:
simulating and generating the actual running state of the power grid and the power generation state of the distributed energy source by using a real-time simulator according to the test demand signal;
carrying out denoising processing on the analog signal interacted with the measured control system end by using a signal conditioning board card;
wherein, the real-time simulation machine is the core of the real-time simulation test system end, and the hardware part includes: CPU and peripheral circuit, FPGA and peripheral circuit; the running state of the power grid is simulated in a CPU of the real-time simulation equipment, and the power generation state of the distributed energy is simulated in the FPGA; the semi-physical simulation system takes a primary side inductor of the grid-connected transformer as a decoupling element, a primary side model of the grid-connected transformer runs on a CPU, and a secondary side model of the grid-connected transformer runs on a field programmable gate array FPGA.
Preferably, wherein the method further comprises:
the interaction of analog signals and digital signals with a measured controller is realized by utilizing a photoelectric converter;
and amplifying the transmitted control signal by using a power amplifier.
Preferably, wherein the method further comprises:
switching signals of each controlled module of the inverter, which are sent by the measured controller, need to be transmitted to the real-time simulation equipment through corresponding data links, and meanwhile, signal conversion is carried out on the controller which needs to be communicated through optical fibers through configuring a corresponding photoelectric conversion box.
The invention provides a system and a method for testing an immediate plug-in type energy Internet networking controller, wherein the minimum step length of the system can reach 20us, and the system can meet the requirements of various grades of power electronic simulation; the function of online parameter adjustment is supported, and various control parameters, signal variables and the like can be modified at will in the simulation operation process; the simulation data can be recorded in real time, and meanwhile, the simulation data has strong data analysis and operation functions; the system and the method can carry out digital detection on the controller of the grid-connected power electronic device, simulate various working conditions and faults of the power grid in simulation software, detect the performance of the controller of the power electronic device, allow grid connection when the detection is qualified and carry out gate entry for the power grid.
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A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic structural diagram of a test system 100 for a network-connected controller of an plug-in energy internet according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a test system of an internet controller according to an embodiment of the present invention;
fig. 3 is an exemplary diagram of a testing system 1 of an internet controller according to an embodiment of the present invention;
fig. 4 is an exemplary diagram of a testing system 2 of a school plug-and-play energy internet networking controller according to an embodiment of the present invention;
fig. 5 is a flowchart of a method 500 for testing a network-connected controller of plug-in power internet according to an embodiment of the invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic structural diagram of a testing system 100 for a plug-in energy internet controller according to an embodiment of the present invention. As shown in fig. 1, the minimum step size of the testing system of the plug-in energy internet networking controller provided by the embodiment of the invention can reach 20us, and various levels of power electronic simulation can be satisfied; the function of online parameter adjustment is supported, and various control parameters, signal variables and the like can be modified at will in the simulation operation process; the simulation data can be recorded in real time, and meanwhile, the simulation data has strong data analysis and operation functions; the system can carry out digital detection on the controller of the grid-connected power electronic device, simulate various working conditions and faults of the power grid in simulation software, be used for detecting the performance of the controller of the power electronic device, realize qualified detection, allow grid connection and carry out network access control on the power grid. The system 100 for testing an internet-connected controller of an instant plug-in energy internet according to an embodiment of the present invention includes: a monitoring system terminal 101, a real-time simulation test system terminal 102 and a measured control system terminal 103.
Preferably, the monitoring system terminal 101 is configured to start a test program and send a test requirement signal to the real-time simulation test system terminal; for analyzing the received power data to determine the performance of the monitored controller.
Preferably, the monitoring system end analyzes the received power data to determine the performance of the measured controller, and includes:
determining power control precision, power overshoot and response time according to the power data;
if the power control precision meets the rated power which is less than or equal to the multiple of the first preset percentage threshold, determining that the power control precision meets the requirement;
if the power overshoot capacity meets the rated power with the maximum deviation of the active power being less than or equal to the second preset percentage threshold multiple and the rated power with the maximum deviation of the reactive power being less than or equal to the third preset percentage threshold multiple, determining that the power overshoot meets the requirement;
and if the response time is less than or equal to a preset power value response time threshold value, determining that the response time meets the requirement.
In the present invention, the power control accuracy test: analyzing at least two working conditions, and in the running process of keeping each set power value (Pset), taking the power average value of every 0.2s as a calculation point, and calculating the active power average value in the period of keeping the reference value, thereby judging the power control precision;
the power control overshoot test comprises the following steps: setting the maximum operation value Pmax of the grid-connected inverter power deviating from the target during the power constant value control operation period, setting the power measurement value after each power change as Pmean, and judging the power control overshoot by utilizing a formula (| Pmax-Pmean |/Pmean) x 100%;
the power set point responds to the time test and observes and records the entire time from the start time of power set control to the time of power change to the first 90% step value.
The tolerance range of the power control precision is that the active power precision does not exceed 1% of rated power; the power overshoot tolerance range is that the maximum deviation of the active power does not exceed 1% of the rated power, and the maximum deviation of the reactive power does not exceed 5% of the rated power capacity; the set power value response time should be less than 30 s.
Referring to fig. 2, in the present invention, the monitoring system end and the real-time simulation testing system end may be integrated into one device, and may be directly connected to the measured controller when in use. Specifically, the monitoring system end includes: a workstation and an oscilloscope with a double-screen display function. The workstation is used for executing a program and sending a test demand signal to the real-time simulation test system end. The oscilloscope is used for converting a power signal acquired by a real-time simulator (real-time simulation equipment) into image data to be displayed. Meanwhile, the workstation can analyze the received power data to determine the performance of the measured controller.
Preferably, the real-time simulation test system end 102 is configured to simulate an operation state of a power grid and a power generation state of a distributed energy source according to the test demand signal, determine a power test demand signal according to the simulated operation state of the power grid and the power generation state of the distributed energy source, and send the power test demand signal to the test control system end; and the power control module is used for acquiring power data of interaction between the distributed energy grid-connected system and the simulation power grid according to the power control signal and sending the power data to a monitoring system terminal.
Preferably, the real-time simulation test system terminal includes:
the real-time simulator is used for simulating and generating the actual running state of the power grid and the power generation state of the distributed energy according to the test demand signal;
the signal conditioning board card is respectively connected with the real-time simulator and the end of the measured control system and is used for denoising the analog signal interacted with the end of the measured control system;
wherein, the real-time simulation machine is the core of the real-time simulation test system end, and the hardware part includes: CPU and peripheral circuit, FPGA and peripheral circuit; the running state of the power grid is simulated in a CPU of the real-time simulation equipment, and the power generation state of the distributed energy is simulated in the FPGA; the semi-physical simulation system takes a primary side inductor of the grid-connected transformer as a decoupling element, a primary side model of the grid-connected transformer runs on a CPU, and a secondary side model of the grid-connected transformer runs on a field programmable gate array FPGA.
Referring to fig. 2, in the present invention, the real-time simulation test system includes: the system comprises a real-time simulator, a network switch, a signal conditioning board card and a semi-physical simulation system embedded in the real-time simulator. The real-time simulator is electrically connected with the photoelectric converter, is connected with the workstation through a network switch, is electrically connected with the oscilloscope, and is used for receiving a control signal transmitted by the monitored controller, acquiring the grid-connected power data and transmitting the grid-connected power data to the monitoring system. The semi-physical simulation system takes the primary side inductance of the grid-connected transformer as a decoupling element, the primary side model of the grid-connected transformer runs on a CPU, and the secondary side model of the grid-connected transformer runs on an FPGA.
In addition, the plurality of real-time simulation test systems can be connected with a network switch through the Ethernet, and the network switch is in signal connection with the monitoring system. By adopting the design, the system can be expanded.
Preferably, the measured control system 103 is configured to receive a control request sent by the real-time simulation test system end according to the power test demand signal, and send a power control signal to a grid-connected system of the real-time simulation test system end.
Preferably, wherein the system further comprises: an opto-electric converter and a power amplifier; wherein,
the photoelectric converter is respectively connected with the measured controller and the power amplifier and is used for realizing the interaction of analog signals and digital signals with the measured controller;
and the power amplifier is used for amplifying the transmitted control signal.
Preferably, wherein the system further comprises:
and the data transmission module is used for transmitting the switching signals of each controlled module of the grid-connected inverter, which are sent by the monitored controller, to the real-time simulation equipment through corresponding data links, and simultaneously performing signal conversion on the controller which needs to communicate through optical fibers by configuring a corresponding photoelectric conversion box.
In the invention, the system to be tested comprises a controller to be tested, a photoelectric converter and a power amplifier. The measured controller is electronic equipment to be measured, and the photoelectric converter is used for signal conversion. The real-time simulator has the functions of realizing physical signal connection and real-time I/O port configuration with a measured controller, a photoelectric converter, a power amplifier, an oscilloscope and the like. And the simulation test signal output by the simulation test system is input into the tested controller for calculation of the control algorithm. Switching signals of each controlled module of the grid-connected inverter, which are sent by the controlled controller, need to be transmitted to the simulator through corresponding data links; for a controller needing to communicate through an optical fiber, a corresponding photoelectric conversion box needs to be additionally configured for signal conversion. Due to the design, the real-time simulation machine is high in adaptability. The real-time simulator is provided with a signal conditioning board card which is in electrical signal connection with the measured controller and used for denoising the simulation test signal input to the measured controller.
The process of utilizing the system of the invention to carry out the testing of the network-connected controller comprises the following steps:
s1: executing the program through the workstation, and sending a signal to the real-time simulation test system;
s2: the real-time simulation machine simulates an actual power grid operation state and a distributed energy power generation state, and the real-time simulation test system simulates the actual power grid operation state according to the test demand control signal and the grid-connected control signal sent by the measured controller;
s3, the tested controller receives the simulation test demand signal and outputs a grid-connected control signal according to a set grid-connected power value;
s4: acquiring power data output by the measured controller and the distributed energy grid-connected unit through a real-time simulator, transmitting the power data to a workstation, and simultaneously transmitting the data to an oscilloscope;
s5: the workstation analyzes the data for testing, thereby judging the performance of the tested controller.
Fig. 3 is a diagram illustrating an example of a system 1 for testing a network-connected controller of an plug-in energy internet according to an embodiment of the present invention. As shown in fig. 3, the pv inverter controller is used as a measured controller, and the pv inverter controller operates a simulation model in a real-time simulation test system with a real-time processor to simulate a grid-connected state of distributed energy of a controlled object, and is connected to the measured controller through an I/O interface to perform an omnidirectional and systematic test on the measured controller. The photovoltaic inverter controller real object is connected with a real-time simulation model of the real-time simulation test system through a digital physical hybrid simulation interface (a photoelectric converter) to form a complete grid-connected test system. The semi-physical simulation system embedded in the real-time simulator is mainly responsible for the operation of the digital simulation model, and can be a model of a large power grid, a digital model of a power system or a digital model of a micro-grid and the like according to different research contents. And in the digital-physical hybrid simulation, a digital model of an interface algorithm and the interface algorithm compensate the whole simulation system during data interaction between a digital system and a physical system, so that the system is stabilized and the accuracy is improved.
Fig. 4 is a diagram illustrating an example of the testing system 2 of the grid-connected controller of the plug-and-play energy internet according to an embodiment of the present invention. As shown in fig. 4, the actual inverter is set as the measured controller, and at this time, the photovoltaic analog power supply needs to be connected to the real-time simulation test system; by means of a power electronic and power system model library provided by a simulation platform and a special real-time calculation method for a power system, and combining a flexible I/O interface, high-precision in-loop real-time simulation of power electronic and power system hardware can be realized.
Aiming at the simulation of the power electronic topology in the new energy field with the switching frequency of the power device less than or equal to 10kHz, the power electronic power device with the interpolation compensation function and the PWM pulse driving model library special for the simulation platform are adopted, and the digital real-time simulation and the hardware-in-loop real-time simulation with the step length of 20us can be realized.
Aiming at the simulation of the power electronic topology in the new energy field with the switching frequency of the power device between 10kHz and 50kHz, an FPGA simulation development tool is adopted to realize the simulation, and the FPGA-based hardware-in-loop real-time simulation with 2us step length can be realized by means of a model library and an algorithm provided by the FPGA simulation development tool; and resolving a netlist model containing the power electronic topology mapping structure and parameters, wherein the netlist model can generate an x-mat file, and when the model runs, the CPU transmits the x-mat file generated by the netlist model to the FPGA, so that the power electronic topology built by the netlist model is realized on the FPGA.
The hardware-in-loop simulation of the power electronic topology is realized, a power circuit of power electronics is simulated in a simulator, an operation result is output from an IO port of the simulator, an output signal is in butt joint with a user controller, the controller executes a control algorithm and outputs a control signal to the IO port of the simulator, and the simulator captures the control signal and completes the real-time calculation of a model.
The invention provides a convenient condition for the research of the grid-connected performance detection hardware in-loop detection test of the photovoltaic inverter based on an accurate power electronic topological simulation model, high-performance real-time computing capability and a flexible IO interface.
Fig. 5 is a flowchart of a method 500 for testing a network-connected controller of plug-in power internet according to an embodiment of the invention. As shown in fig. 5, the testing method 500 for the plug-in energy internet networking controller according to the embodiment of the invention starts with step 501, and in step 501, the monitoring system executes a testing program and sends a testing request signal to the real-time simulation testing system.
In step 502, the real-time simulation test system terminal simulates the operation state of the power grid and the power generation state of the distributed energy source according to the test demand signal, determines a power test demand signal according to the simulated operation state of the power grid and the power generation state of the distributed energy source, and sends the power test demand signal to the measured control system terminal.
In step 503, the measured control system receives the control request sent by the real-time simulation test system end by using the measured controller according to the power test demand signal, and sends a power control signal to the grid-connected system of the real-time simulation test system end.
In step 504, the real-time simulation test system end obtains power data of interaction between the distributed energy grid-connected system and the simulation power grid according to the power control signal, and sends the power data to the monitoring system end.
In step 505, the monitoring system side analyzes the power data to determine the performance of the monitored controller.
Preferably, the analyzing the received power data by the monitoring system end to determine the performance of the measured controller includes:
determining power control precision, power overshoot and response time according to the power data;
if the power control precision meets the rated power which is less than or equal to the multiple of the first preset percentage threshold, determining that the power control precision meets the requirement;
if the power overshoot capacity meets the rated power with the maximum deviation of the active power being less than or equal to the second preset percentage threshold multiple and the rated power with the maximum deviation of the reactive power being less than or equal to the third preset percentage threshold multiple, determining that the power overshoot meets the requirement;
and if the response time is less than or equal to a preset power value response time threshold value, determining that the response time meets the requirement.
Preferably, wherein the method further comprises:
simulating and generating the actual running state of the power grid and the power generation state of the distributed energy source by using a real-time simulator according to the test demand signal;
carrying out denoising processing on the analog signal interacted with the measured control system end by using a signal conditioning board card;
wherein, the real-time simulation machine is the core of the real-time simulation test system end, and the hardware part includes: CPU and peripheral circuit, FPGA and peripheral circuit; the running state of the power grid is simulated in a CPU of the real-time simulation equipment, and the power generation state of the distributed energy is simulated in the FPGA; the semi-physical simulation system takes a primary side inductor of the grid-connected transformer as a decoupling element, a primary side model of the grid-connected transformer runs on a CPU, and a secondary side model of the grid-connected transformer runs on a field programmable gate array FPGA.
Preferably, wherein the method further comprises:
the interaction of analog signals and digital signals with a measured controller is realized by utilizing a photoelectric converter;
and amplifying the transmitted control signal by using a power amplifier.
Preferably, wherein the method further comprises:
switching signals of each controlled module of the grid-connected inverter, which are sent by the monitored controller, need to be transmitted to the real-time simulation equipment through corresponding data links, and meanwhile, signal conversion is carried out on the controller which needs to be communicated through optical fibers through configuring a corresponding photoelectric conversion box.
The testing method 500 of the plug-in energy internet networking controller according to the embodiment of the present invention corresponds to the testing system 100 of the plug-in energy internet networking controller according to another embodiment of the present invention, and is not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A system for testing a plug-in energy Internet networking controller, the system comprising:
the monitoring system end is used for starting a test program and sending a test demand signal to the real-time simulation test system end; analyzing the received power data to determine the performance of the monitored controller;
the real-time simulation test system end is used for simulating the running state of the power grid and the power generation state of the distributed energy sources according to the test demand signal, determining a power test demand signal according to the simulated running state of the power grid and the power generation state of the distributed energy sources, and sending the power test demand signal to the test control system end; the power control system is used for acquiring power data of interaction between the distributed energy grid-connected system and a simulation power grid according to the power control signal and sending the power data to a monitoring system end;
and the tested control system end is used for receiving the control request sent by the real-time simulation test system end according to the power test demand signal and sending a power control signal to a grid-connected system of the real-time simulation test system end.
2. The system of claim 1, wherein analyzing the received power data to determine the performance of the monitored controller comprises:
determining power control precision, power overshoot and response time according to the power data;
if the power control precision meets the rated power which is less than or equal to the multiple of the first preset percentage threshold, determining that the power control precision meets the requirement;
if the power overshoot capacity meets the rated power with the maximum deviation of the active power being less than or equal to the second preset percentage threshold multiple and the rated power with the maximum deviation of the reactive power being less than or equal to the third preset percentage threshold multiple, determining that the power overshoot meets the requirement;
and if the response time is less than or equal to a preset power value response time threshold value, determining that the response time meets the requirement.
3. The system of claim 1, wherein the real-time simulation test system comprises:
the real-time simulator is used for simulating and generating the actual running state of the power grid and the power generation state of the distributed energy according to the test demand signal;
the signal conditioning board card is respectively connected with the real-time simulator and the end of the measured control system and is used for denoising the analog signal interacted with the end of the measured control system;
wherein, the real-time simulation machine is the core of the real-time simulation test system end, and the hardware part includes: CPU and peripheral circuit, FPGA and peripheral circuit; the running state of the power grid is simulated in a CPU of the real-time simulation equipment, and the power generation state of the distributed energy is simulated in the FPGA; the semi-physical simulation system takes a primary side inductor of the grid-connected transformer as a decoupling element, a primary side model of the grid-connected transformer runs on a CPU, and a secondary side model of the grid-connected transformer runs on a field programmable gate array FPGA.
4. The system of claim 1, further comprising: an opto-electric converter and a power amplifier; wherein,
the photoelectric converter is respectively connected with the measured controller and the power amplifier and is used for realizing the interaction of analog signals and digital signals with the measured controller;
and the power amplifier is used for amplifying the transmitted control signal.
5. The system of claim 1, further comprising:
and the data transmission module is used for transmitting the switching signals of each controlled module of the grid-connected unit sent by the monitored controller to the real-time simulation equipment through corresponding data links, and simultaneously carrying out signal conversion on the controller needing to be communicated through optical fibers by configuring a corresponding photoelectric conversion box.
6. A testing method for a plug-in energy Internet networking controller is characterized by comprising the following steps:
the monitoring system end executes the test program and sends a test demand signal to the real-time simulation test system end;
the real-time simulation test system end simulates the running state of a power grid and the power generation state of the distributed energy according to the test demand signal, determines a power test demand signal according to the simulated running state of the power grid and the power generation state of the distributed energy, and sends the power test demand signal to the monitored control system end;
the tested control system end receives a control request sent by the real-time simulation test system end according to the power test demand signal by using a tested controller, and sends a power control signal to a grid-connected system of the real-time simulation test system end;
the real-time simulation test system end acquires power data of interaction between the distributed energy grid-connected system and a simulation power grid according to the power control signal and sends the power data to the monitoring system end;
and the monitoring system end analyzes the power data to determine the performance of the measured controller.
7. The method of claim 6, wherein the monitoring system side analyzing the received power data to determine the performance of the monitored controller comprises:
determining power control precision, power overshoot and response time according to the power data;
if the power control precision meets the rated power which is less than or equal to the multiple of the first preset percentage threshold, determining that the power control precision meets the requirement;
if the power overshoot capacity meets the rated power with the maximum deviation of the active power being less than or equal to the second preset percentage threshold multiple and the rated power with the maximum deviation of the reactive power being less than or equal to the third preset percentage threshold multiple, determining that the power overshoot meets the requirement;
and if the response time is less than or equal to a preset power value response time threshold value, determining that the response time meets the requirement.
8. The method of claim 6, further comprising:
simulating and generating the actual running state of the power grid and the power generation state of the distributed energy source by using a real-time simulator according to the test demand signal;
carrying out denoising processing on the analog signal interacted with the measured control system end by using a signal conditioning board card;
wherein, the real-time simulation machine is the core of the real-time simulation test system end, and the hardware part includes: CPU and peripheral circuit, FPGA and peripheral circuit; the running state of the power grid is simulated in a CPU of the real-time simulation equipment, and the power generation state of the distributed energy is simulated in the FPGA; the semi-physical simulation system takes a primary side inductor of the grid-connected transformer as a decoupling element, a primary side model of the grid-connected transformer runs on a CPU, and a secondary side model of the grid-connected transformer runs on a field programmable gate array FPGA.
9. The method of claim 6, further comprising:
the interaction of analog signals and digital signals with a measured controller is realized by utilizing a photoelectric converter;
and amplifying the transmitted control signal by using a power amplifier.
10. The method of claim 6, further comprising:
switching signals of all controlled modules of the distributed energy grid-connected unit, which are sent by the monitored controller, need to be transmitted to the real-time simulation equipment through corresponding data links, and meanwhile, signal conversion is carried out on the controller which needs to be communicated through optical fibers through configuring a corresponding photoelectric conversion box.
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