RT-LAB-based broadband oscillation suppression device closed-loop test method and system

Abstract

According to the broadband oscillation suppression device closed-loop test method and system based on RT-LAB, an upper computer sends a grid-connected test model and broadband oscillation simulation parameters to a target machine, and the target machine generates broadband oscillation simulation data; the controller of the broadband oscillation suppression device sends an instruction for requesting broadband oscillation simulation data to the interface board card, and the broadband oscillation simulation data is sent to the controller of the broadband oscillation suppression device through the interface board card and the unit simulation board card; the target machine sends the broadband oscillation simulation feedback data to the upper computer, and the upper computer sets configuration parameters of a controller of the broadband oscillation suppression device according to the broadband oscillation simulation feedback data; the controller of the set broadband oscillation suppression device sends an instruction for requesting real-time data of the new energy system to the interface board card, the target machine sends test feedback data to the upper computer, the upper computer evaluates the performance of the broadband oscillation suppression device according to the test feedback data, and the risk of field test after the broadband oscillation suppression device is put into operation is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system modeling and broadband oscillation suppression test methods, and in particular, relates to a closed-loop test method and system for a broadband oscillation suppression device based on RT-LAB. Background Art

[0002] In recent years, with the large-scale grid connection of renewable energy, the formation of high-voltage direct current transmission networks and the commissioning of power electronic loads, modern power systems are facing more and more broadband oscillation problems. Broadband oscillation may damage power equipment, cause the shutdown of renewable energy generators, seriously affect equipment safety, and threaten the stable operation of the system.

[0003] The structure of power electronic equipment in new power systems is complex, and the system exhibits characteristics such as low inertia, high-frequency discreteness, and strong nonlinearity, which leads to frequent wide-band oscillations in the power grid from a few tenths of a hertz to several kilohertz. In order to ensure the safe and stable operation of the system, it is necessary to incorporate a wide-band oscillation suppression device into the system so that the wide-band oscillation can be effectively suppressed at the first time the oscillation occurs, and the oscillation can be calmed with the optimal solution to ensure the reliable operation of the power system. In order to avoid the situation where the wide-band oscillation suppression device incorporated into the power grid cannot effectively suppress the wide-band oscillation, it is necessary to conduct closed-loop testing on the suppression effect of the wide-band oscillation suppression device for different oscillation conditions so that the control parameters can be accurately adjusted to suppress the oscillation with the optimal effect.

[0004] In the prior art, the closed-loop test of the broadband oscillation suppression device includes real-time setting of field test, hardware-in-the-loop test of real-time digital simulation system (RTDS), dSPACE semi-physical simulation, etc. However, the risk of real-time setting of field test is relatively high, which may cause the broadband oscillation suppression device to inject oscillation current into the power grid to cause power grid oscillation, and various oscillation conditions are difficult to reproduce, and may also damage the switch device of the broadband oscillation suppression device; although RTDS can simulate the mathematical model of all functional modules and components of the power system in the logic chip, and has a relatively complete power system and control system components, as well as rich I / O boards and processor boards with high computing power, its test environment is too expensive. Although dSPACE semi-physical simulation can achieve close connection with Matlab / Simulink, when the system and algorithm become more complex, the hardware system of dSPACE cannot meet the requirements of real-time control. In particular, when broadband oscillation of wind farms occurs in the actual field, the control parameters of the broadband oscillation suppression device cannot be adjusted in real time, so that the closed-loop test of the broadband oscillation suppression device cannot be realized. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides a closed-loop test method and system for a broadband oscillation suppression device based on RT-LAB. A hardware-in-the-loop control system is constructed through the RT-LAB semi-physical simulation platform and the broadband oscillation suppression device controller to simulate the broadband oscillation occurring in the actual field, adjust the control parameters of the broadband oscillation suppression device in real time, complete the closed-loop test of the broadband oscillation suppression device, and reduce the risk of the broadband oscillation suppression device after on-site commissioning.

[0006] The present invention adopts the following technical solution.

[0007] The present invention proposes a closed-loop test method for a broadband oscillation suppression device based on RT-LAB. The RT-LAB semi-physical simulation platform includes a host computer, a target computer, an interface board and a unit simulation board. The method includes:

[0008] Establish a new energy system simulation model and configure simulation parameters in the host computer, establish a main circuit simulation model of the broadband oscillation suppression device and configure simulation parameters; adjust the topological connection of the new energy system simulation model according to the grid-connected scenario of the new energy system, and connect the main circuit simulation model of the broadband oscillation suppression device to the new energy system simulation model to obtain a grid-connected test model; the host computer sends the grid-connected test model and broadband oscillation simulation parameters to the target computer, and the target computer performs simulation calculations to generate broadband oscillation simulation data;

[0009] The controller of the broadband oscillation suppression device sends an instruction to the interface board to request broadband oscillation simulation data, and the broadband oscillation simulation data is sent to the controller of the broadband oscillation suppression device via the interface board and the unit simulation board; the controller of the broadband oscillation suppression device outputs a modulated wave signal according to the broadband oscillation simulation data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the broadband oscillation simulation data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switch device in the main circuit simulation model of the broadband oscillation suppression device to generate broadband oscillation simulation feedback data, and the target machine sends the broadband oscillation simulation feedback data to the host computer, and the host computer adjusts the configuration parameters of the controller of the broadband oscillation suppression device according to the broadband oscillation simulation feedback data;

[0010] The controller of the adjusted wide-band oscillation suppression device sends an instruction to the interface board to request real-time data of the new energy system, and the real-time data is sent to the controller of the wide-band oscillation suppression device and the unit simulation board via the interface board; the controller of the wide-band oscillation suppression device outputs a modulated wave signal according to the real-time data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the real-time data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switching device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching device in the main circuit simulation model of the wide-band oscillation suppression device to generate test feedback data, and the target machine sends the test feedback data to the host computer, and the host computer evaluates the performance of the wide-band oscillation suppression device according to the test feedback data.

[0011] Preferably, in the host computer, the simulation parameters are adjusted according to the actual grid-connected scenario of the new energy system to simulate the broadband oscillation failure in the actual grid-connected scenario; the target machine performs simulation calculations to generate broadband oscillation simulation data based on the grid-connected test model and broadband oscillation simulation parameters sent by the host computer.

[0012] Preferably, the interface board is connected to the target machine via a bus, the interface board is connected to the unit simulation board via Ethernet, and the controller of the broadband oscillation suppression device is connected to the unit simulation board via Ethernet.

[0013] Preferably, the controller of the broadband oscillation suppression device includes: a processor; when the processor sends an instruction to the interface board to request the target machine to generate broadband oscillation simulation data, the interface board sends the broadband oscillation simulation data to the processor through the ACP interface according to the instruction; the processor generates a modulated wave signal according to the broadband oscillation simulation data.

[0014] Preferably, the unit simulation board includes a control logic unit and a signal synthesis unit; wherein, the control logic of the main circuit simulation model is established in the control logic unit in a mapping manner, the broadband oscillation simulation data is transmitted to the control logic unit via the interface board, the control logic unit outputs a carrier signal according to the broadband oscillation simulation data, and the signal synthesis unit generates a pulse trigger signal for the switching device in the main circuit simulation model based on the carrier signal and the modulation wave signal.

[0015] Preferably, the broadband oscillation simulation feedback data generated by the target machine according to the pulse trigger signal includes: the suppression current injected into the grid by the broadband oscillation suppression device, the oscillation damping coefficient of the grid-connected test model, and the active power of each oscillation mode of the grid-connected test model.

[0016] Preferably, the host computer verifies the effectiveness and correctness of the broadband oscillation suppression device in suppressing broadband oscillations based on the suppression current injected into the grid by the broadband oscillation suppression device according to the feedback of the target machine; the host computer adjusts the configuration parameters of the controller of the broadband oscillation suppression device and optimizes the installation position of the broadband oscillation suppression device based on the oscillation damping coefficient of the grid-connected test model and the active power of each oscillation mode fed back by the target machine and the tolerance of the grid-connected test model to the risk of broadband oscillations.

[0017] The present invention proposes a closed-loop test system for a broadband oscillation suppression device based on RT-LAB. The RT-LAB semi-physical simulation platform includes a host computer, a target computer, an interface board and a unit simulation board. The system includes:

[0018] A wide-band oscillation simulation data generation module is used to establish a new energy system simulation model and configure simulation parameters in the host computer, establish a main circuit simulation model of the wide-band oscillation suppression device and configure simulation parameters; according to the grid-connected scenario of the new energy system, adjust the topological wiring of the new energy system simulation model, and connect the main circuit simulation model of the wide-band oscillation suppression device to the new energy system simulation model to obtain a grid-connected test model; the host computer sends the grid-connected test model and the wide-band oscillation simulation parameters to the target computer, and the target computer performs simulation calculations to generate wide-band oscillation simulation data;

[0019] A wide-band oscillation suppression device setting module is used for the controller of the wide-band oscillation suppression device to send an instruction to the interface board to request wide-band oscillation simulation data, and the wide-band oscillation simulation data is sent to the controller of the wide-band oscillation suppression device via the interface board and the unit simulation board; the controller of the wide-band oscillation suppression device outputs a modulated wave signal according to the wide-band oscillation simulation data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the wide-band oscillation simulation data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switch device in the main circuit simulation model of the wide-band oscillation suppression device to generate wide-band oscillation simulation feedback data, and the target machine sends the wide-band oscillation simulation feedback data to the host computer, and the host computer sets the configuration parameters of the controller of the wide-band oscillation suppression device according to the wide-band oscillation simulation feedback data;

[0020] A wide-band oscillation suppression device test module is used for the controller of the adjusted wide-band oscillation suppression device to send instructions to the interface board to request real-time data of the new energy system, and the real-time data is sent to the controller of the wide-band oscillation suppression device and the unit simulation board via the interface board; the controller of the wide-band oscillation suppression device outputs a modulated wave signal according to the real-time data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the real-time data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switching device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching device in the main circuit simulation model of the wide-band oscillation suppression device to generate test feedback data, and the target machine sends the test feedback data to the host computer, and the host computer evaluates the performance of the wide-band oscillation suppression device according to the test feedback data.

[0021] The present invention is also a terminal, comprising a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the method.

[0022] The present invention is also a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method when executed by a processor.

[0023] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention at least includes: for the suppression function test of the broadband oscillation suppression device, the broadband oscillation suppression device hardware closed-loop test system is constructed based on the RT-LAB semi-physical simulation platform;

[0024] By modifying the scenario model to simulate different actual wind farm grid-connected scenarios, and by modifying the wind speed and direction of the wind farm to simulate the oscillation conditions of the wind farm under different working conditions, the control parameters of the broadband oscillation suppression device controller are adjusted in real time to conduct a comprehensive and efficient test of the suppression function of the broadband oscillation suppression device, thereby ensuring the effective effect of the broadband oscillation suppression device on the broadband oscillation suppression of the wind farm. This replaces the on-site parameter setting test of the broadband oscillation suppression device after it is put into operation, reduces the risk of on-site parameter setting test of the broadband oscillation suppression device, and ensures the safe and stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of a closed-loop test method of a broadband oscillation suppression device based on RT-LAB proposed by the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0027] The present invention proposes a closed-loop test method for a broadband oscillation suppression device based on RT-LAB. The RT-LAB semi-physical simulation platform includes a host computer, a target computer, an interface board and a unit simulation board. Figure 1 As shown, the method includes:

[0028] Step 1, establish a new energy system simulation model and configure simulation parameters in the host computer, establish a main circuit simulation model of the wide-band oscillation suppression device and configure simulation parameters; according to the grid-connected scenario of the new energy system, adjust the topological wiring of the new energy system simulation model, and connect the main circuit simulation model of the wide-band oscillation suppression device to the new energy system simulation model to obtain a grid-connected test model; the host computer sends the grid-connected test model and simulation parameters to the target machine, and the target machine performs simulation calculations to generate simulation data.

[0029] In the present invention, a closed-loop test of a broadband oscillation suppression device adopts a semi-physical simulation test method, and the required hardware includes an RT-LAB semi-physical simulation platform and a controller of the broadband oscillation suppression device, wherein a main circuit simulation model of the broadband oscillation suppression device is established in the RT-LAB semi-physical simulation platform, and the controller of the broadband oscillation suppression device is a physical object. The controller of the broadband oscillation suppression device serves as a main controller that carries a broadband suppression algorithm, and mainly controls the power module of the broadband oscillation suppression device by identifying the current and voltage oscillations of the wind farm and generating a modulation wave in combination with a network construction algorithm, thereby injecting suppression current into the power grid.

[0030] Specifically, the RT-LAB semi-physical simulation platform includes: a host computer; the host computer is a user end running Matlab / Simulink and RT-LAB, and is used to establish, compile and transmit simulation models, monitor simulation signals, adjust simulation parameters online, and store simulation feedback data of the target machine; in the embodiment, the simulation models in the host computer include but are not limited to: a unit simulation model and a station simulation model of a wind farm, and a main circuit simulation model of a broadband oscillation suppression device.

[0031] In the embodiment, based on the Simulink simulation platform, the wind farm unit simulation model and the station simulation model are built to simulate the actual wind farm; by manually setting the input of the wind farm unit model and the station model and the actual wind farm operation data, the various simulation parameters of the wind farm unit simulation model and the station simulation model are initialized; wherein, the unit simulation model includes but is not limited to: wind speed module, wind turbine motor module, converter switch module, wind turbine network side controller module, wind turbine rotor side control module, pitch angle control module, maximum power tracking control module; based on the RT-LAB compilation standard, each module in the unit simulation model is connected by a line and a control line. The station simulation model includes but is not limited to: multiple unit simulation models, main transformer module, transmission line module, and loop module.

[0032] Various parameters of the wind farm are obtained by manual input or actual wind farm data collection to form a wind farm simulation parameter configuration file. The simulation parameters include constant parameters and variable parameters, among which the constant parameters include but are not limited to: the capacity of a single wind turbine, the number of wind turbines, the radius of the wind turbine blades, the parameters of the wind turbine generator, the control parameters of the wind turbine grid side, the control parameters of the wind turbine rotor side, the wind turbine pitch angle control parameters, the maximum power tracking control parameters of the wind turbine, the impedance of the wind farm transmission cable, and the wind farm loop settings; the variable parameters include but are not limited to: the wind direction and wind speed of the wind farm inflow.

[0033] According to the unchanged parameters, the parameters of the wind turbine motor module, the grid-side control algorithm of the wind turbine grid-side controller module, the rotor-side control algorithm of the wind turbine rotor-side control module, the pitch angle control algorithm of the pitch angle control module, the maximum power tracking control algorithm of the maximum power tracking control module, the main transformer parameters, the transmission line parameters, and the loop parameters are initialized and set.

[0034] In the embodiment, based on the Simulink simulation platform, a main circuit simulation model of the broadband oscillation suppression device is constructed, including: a power simulation module and a startup circuit simulation module, and simulation parameters of the power simulation module and the startup circuit simulation module are set. The startup circuit module includes but is not limited to: an incoming switch simulation model, a bypass switch simulation model, a charging resistor simulation model, an isolation switch simulation model, and a grounding switch simulation model.

[0035] By manually inputting or collecting actual device parameters, relevant simulation parameters of the power simulation module and the starting circuit simulation module are set to simulate the main circuit equipment of the actual wide-band oscillation suppression device.

[0036] In the embodiment, according to the actual wind farm grid-connected scenario, the topological connection of the new energy system simulation model is adjusted, including: connecting the #001 unit simulation model to the 35kV#I bus through the #001 main transformer (690V / 35kV) and the #001 transmission line; connecting the #003 wind farm to the 35kV#I bus through the #003 main transformer (690V / 35kV) and the #003 transmission line; connecting the #005 wind farm to the 35kV#I bus through the #005 main transformer (690V / 35kV) and the #005 transmission line; connecting the #007 wind farm to the 35kV#I bus through the #007 main transformer (690V / 35kV) and the #007 transmission line. ; Connect the #009 wind farm to the 35kV#I bus through the #009 main transformer (690V / 35kV) and the #009 transmission line; connect the power module of the broadband oscillation suppression device directly to the 35kV bus in the station simulation model according to the mainstream modular cascade multi-level design scheme and the medium-voltage chain star connection design form; connect the 35kV#I bus to the 220kV#I bus through the #010 main transformer (35kV / 220kV) and the #010 transmission line; connect the 220kV#I bus to the 500kV#I bus through the #100 main transformer (220kV / 500kV) and the #100 transmission line; connect the 500kV#I bus to the large power grid. And connect the power simulation module and the startup simulation circuit module of the broadband oscillation suppression device to the new energy system simulation model to obtain the grid-connected test model.

[0037] The host computer sends the grid-connected test model and simulation parameters to the target computer, and the target computer performs simulation calculations to generate simulation data.

[0038] The target machine is the main body of real-time simulation, which is used to receive the simulation model compiled by the host computer and allocate the computing resources of the target machine computing core, and at the same time perform data interaction, hardware-in-the-loop and other functions through various boards. The host computer and the target machine interact online in real time through the TCP / IP Ethernet communication protocol; in the embodiment, the simulation model constructed in the host computer and the configuration parameters of the compiled simulation model are sent to the target machine, and the target machine simulates the simulation model according to the configuration parameters to obtain simulation data. In the host computer, the simulation parameters are adjusted according to the actual grid-connected scenario of the new energy system to simulate the broadband oscillation fault in the actual grid-connected scenario; the target machine performs simulation calculations according to the grid-connected test model and broadband oscillation simulation parameters sent by the host computer to generate broadband oscillation simulation data.

[0039] Step 2, the controller of the broadband oscillation suppression device sends an instruction to the interface board to request broadband oscillation simulation data, and the broadband oscillation simulation data is sent to the controller of the broadband oscillation suppression device via the interface board and the unit simulation board; the controller of the broadband oscillation suppression device outputs a modulated wave signal according to the broadband oscillation simulation data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the broadband oscillation simulation data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switching device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching device in the main circuit simulation model of the broadband oscillation suppression device to generate broadband oscillation simulation feedback data, and the target machine sends the broadband oscillation simulation feedback data to the host computer, and the host computer adjusts the configuration parameters of the controller of the broadband oscillation suppression device according to the broadband oscillation simulation feedback data.

[0040] In the prior art, after the wide-band oscillation suppression device is put into operation, an on-site parameter setting test of the controller is also required to determine the optimal parameter configuration of the controller, thereby improving the oscillation suppression performance of the wide-band oscillation suppression device. The on-site parameter setting test has high requirements in many aspects such as the test power supply, the test environment, and the test equipment. Therefore, the present invention proposes to conduct a closed-loop test of the wide-band oscillation suppression device based on the RT-LAB semi-physical simulation platform, including the parameter setting of the controller based on the RT-LAB semi-physical simulation platform.

[0041] Specifically, the interface card is connected to the target machine via a bus, the interface card is connected to the unit simulation card via Ethernet, and the controller of the broadband oscillation suppression device is connected to the unit simulation card via Ethernet;

[0042] In the embodiment, the interface board and the target machine are connected via a PCIe bus, and the interface board and the unit simulation board interact in real time online via a TCP / IP Ethernet communication protocol; the controller of the broadband oscillation suppression device and the unit simulation board interact in real time online via a TCP / IP Ethernet communication protocol.

[0043] In the embodiment, the interface board adopts a Spartan6 FPGA SP605 board with a clock period of 100 MHz crystal oscillator, and transmits analog and digital quantities through the TCP / IP Ethernet communication protocol and the PCIe bus.

[0044] Specifically, the controller of the broadband oscillation suppression device includes: a processor; when the processor sends an instruction to the interface card to request the broadband oscillation simulation data generated by the target machine, the interface card sends the broadband oscillation simulation data to the processor through the ACP interface according to the instruction; the processor generates a modulated wave signal according to the broadband oscillation simulation data;

[0045] Specifically, the unit simulation board includes a control logic unit and a signal synthesis unit; wherein, the control logic of the main circuit simulation model is established in the control logic unit in a mapping manner, the broadband oscillation simulation data is transmitted to the control logic unit via the interface board, the control logic unit outputs a carrier signal according to the broadband oscillation simulation data, and the signal synthesis unit generates a pulse trigger signal of the switching device in the main circuit simulation model based on the carrier signal and the modulation wave signal; the pulse trigger signal generated by the unit simulation board not only contains the characteristic data of the modulation wave signal, but also has the frequency characteristics of the carrier signal, thereby ensuring that the pulse trigger signal of the switching device in the main circuit simulation model corresponds to the pulse trigger signal of the switching device in the actual main circuit, thereby improving the reliability of the semi-physical simulation results.

[0046] Specifically, for broadband oscillation simulation data, the broadband oscillation simulation feedback data generated by the target machine according to the pulse trigger signal includes but is not limited to: the suppression current injected into the power grid by the broadband oscillation suppression device, the oscillation damping coefficient of the grid-connected test model, and the active power of each oscillation mode of the grid-connected test model.

[0047] When performing broadband oscillation simulation, the target machine feeds back the suppression current injected into the power grid by the broadband oscillation suppression device to the host machine, which can verify whether the broadband oscillation suppression device correctly and effectively performs the suppression function; the oscillation damping coefficient is an important parameter reflecting the trend of oscillation changes, and the distribution of active power of each oscillation mode of the grid-connected test model characterizes the oscillation source position and oscillation path. The host machine adjusts the configuration parameters of the controller of the broadband oscillation suppression device and optimizes the installation position of the broadband oscillation suppression device based on the oscillation damping coefficient of the grid-connected test model and the active power of each oscillation mode, and based on the grid-connected test model's tolerance of broadband oscillation risks; the method proposed in the present invention realizes the replacement of the on-site adjustment test of the configuration parameters of the controller of the broadband oscillation suppression device, and can also provide information such as the oscillation source position and oscillation path, thereby optimizing the installation position of the broadband oscillation suppression device, and further promoting the optimization of the configuration parameters of the controller of the broadband oscillation suppression device after adjustment.

[0048] In the method provided by the present invention, it is only necessary to modify the grid-connected test model on the host computer to simulate different actual new energy grid-connected scenarios and to simulate the broadband oscillation under different working conditions by modifying relevant simulation parameters, thereby realizing the adjustment of the controller parameters of the broadband oscillation suppression device based on semi-physical simulation, and performing a comprehensive and efficient test on the suppression function of the broadband oscillation suppression device, thereby ensuring the effective effect of the broadband oscillation suppression device on broadband oscillation suppression, thereby replacing the on-site parameter setting test of the broadband oscillation suppression device after it is put into operation, reducing the risk of the on-site parameter setting test of the broadband oscillation suppression device, and ensuring the safe and stable operation of the power grid.

[0049] Step 3, the controller of the adjusted wide-band oscillation suppression device sends an instruction to the interface board to request real-time data of the new energy system, and the real-time data is sent to the controller of the wide-band oscillation suppression device and the unit simulation board via the interface board; the controller of the wide-band oscillation suppression device outputs a modulated wave signal according to the real-time data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the real-time data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switching device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching device in the main circuit simulation model of the wide-band oscillation suppression device to generate test feedback data, and the target machine sends the test feedback data to the host computer, and the host computer evaluates the performance of the wide-band oscillation suppression device according to the test feedback data.

[0050] Specifically, real-time data includes analog and digital quantities collected from new energy systems;

[0051] In the embodiment, the analog quantities of the wind farm include but are not limited to: 500kV#I bus three-phase voltage, #100 main transformer high-voltage side three-phase current, #100 main transformer low-voltage side three-phase current, 220kV#I bus three-phase voltage, #010 main transformer high-voltage side three-phase current, #010 main transformer low-voltage side three-phase current, 35kV#I bus three-phase voltage, #001 main transformer high-voltage side current, #003 main transformer high-voltage side current, #005 main transformer high-voltage side current, #007 main transformer high-voltage side current, #009 main transformer high-voltage side current, and suppression current injected into the power grid by a wide-band oscillation suppression device; the digital quantities of the wind farm include but are not limited to: the state of the incoming line switch knife switch, the state of the bypass switch knife switch, the state of the isolation knife switch, and the state of the grounding knife switch;

[0052] In the embodiment, the collected analog and digital quantities of the new energy system are sent to the Spartan6FPGA SP605 board through the PCIe bus. The collected analog quantities do not need to pass through the power amplifier and then be input into the processor in the controller of the wide-band oscillation suppression device, and the collected digital quantities do not need to pass through the digital quantity input and output board and then be input into the processor in the controller of the wide-band oscillation suppression device. Through the interface board and its interface function design, not only the analog-to-digital converter and power amplifier required for collecting analog signals in the existing simulation process are eliminated, but also the digital quantity input and output board required for collecting digital signals in the existing simulation process is eliminated.

[0053] By running, pausing, reading data, and adjusting the wind speed and direction of the wind farm model in real time through the user interaction interface of the RT-LAB host computer, the actual wind farm oscillation is simulated, the control parameters of the broadband oscillation suppression device controller are adjusted in real time, the effectiveness of the broadband oscillation suppression device is verified, and the closed-loop test of the broadband oscillation suppression device is completed.

[0054] The present invention adopts the TCP / IP communication protocol to transmit analog and digital data between the semi-physical simulation platform and the wide-band oscillation suppression device controller, replaces the AD sampling function of the conventional wide-band oscillation suppression device controller, and eliminates the use of the power amplifier. Compared with the conventional data transmission method, this technology reduces the cost of building a semi-physical simulation platform and improves the flexibility of data transmission quantity and size.

[0055] The present invention adopts a hardware-in-the-loop simulation testing method, replacing the actual equipment or environment with a simulation model, and can carry out limit testing, fault testing, and tests that are expensive or impossible to carry out in the actual environment, thereby avoiding damage to expensive components of the broadband oscillation suppression device and reducing the risk of on-site commissioning of the broadband oscillation suppression device.

[0056] The present invention proposes a closed-loop test system for a broadband oscillation suppression device based on RT-LAB. The RT-LAB semi-physical simulation platform includes a host computer, a target computer, an interface board and a unit simulation board. The system includes:

[0057] A wide-band oscillation simulation data generation module is used to establish a new energy system simulation model and configure simulation parameters in the host computer, establish a main circuit simulation model of the wide-band oscillation suppression device and configure simulation parameters; according to the grid-connected scenario of the new energy system, adjust the topological wiring of the new energy system simulation model, and connect the main circuit simulation model of the wide-band oscillation suppression device to the new energy system simulation model to obtain a grid-connected test model; the host computer sends the grid-connected test model and the wide-band oscillation simulation parameters to the target computer, and the target computer performs simulation calculations to generate wide-band oscillation simulation data;

[0058] A wide-band oscillation suppression device setting module is used for the controller of the wide-band oscillation suppression device to send an instruction to the interface board to request wide-band oscillation simulation data, and the wide-band oscillation simulation data is sent to the controller of the wide-band oscillation suppression device via the interface board and the unit simulation board; the controller of the wide-band oscillation suppression device outputs a modulated wave signal according to the wide-band oscillation simulation data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the wide-band oscillation simulation data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switch device in the main circuit simulation model of the wide-band oscillation suppression device to generate wide-band oscillation simulation feedback data, and the target machine sends the wide-band oscillation simulation feedback data to the host computer, and the host computer sets the configuration parameters of the controller of the wide-band oscillation suppression device according to the wide-band oscillation simulation feedback data;

[0059] A wide-band oscillation suppression device test module is used for the controller of the adjusted wide-band oscillation suppression device to send instructions to the interface board to request real-time data of the new energy system, and the real-time data is sent to the controller of the wide-band oscillation suppression device and the unit simulation board via the interface board; the controller of the wide-band oscillation suppression device outputs a modulated wave signal according to the real-time data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the real-time data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switching device in the main circuit simulation model based on the carrier signal and the modulated wave signal; the pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching device in the main circuit simulation model of the wide-band oscillation suppression device to generate test feedback data, and the target machine sends the test feedback data to the host computer, and the host computer evaluates the performance of the wide-band oscillation suppression device according to the test feedback data.

[0060] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0061] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0062] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0063] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A closed-loop test method for a broadband oscillation suppression device based on RT-LAB, wherein the RT-LAB semi-physical simulation platform includes a host computer, a target computer, an interface board and a unit simulation board, and is characterized in that: include: Establish a new energy system simulation model and configure simulation parameters in the host computer, establish a main circuit simulation model of the broadband oscillation suppression device and configure simulation parameters; adjust the topological connection of the new energy system simulation model according to the grid-connected scenario of the new energy system, and connect the main circuit simulation model of the broadband oscillation suppression device to the new energy system simulation model to obtain a grid-connected test model; the host computer sends the grid-connected test model and broadband oscillation simulation parameters to the target computer, and the target computer performs simulation calculations to generate broadband oscillation simulation data; The controller of the broadband oscillation suppression device sends an instruction to the interface card to request broadband oscillation simulation data, and the broadband oscillation simulation data is sent to the controller of the broadband oscillation suppression device via the interface card and the unit simulation card; The controller of the broadband oscillation suppression device outputs a modulated wave signal according to the broadband oscillation simulation data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the broadband oscillation simulation data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; The pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switch device in the main circuit simulation model of the broadband oscillation suppression device to generate broadband oscillation simulation feedback data, and the target machine sends the broadband oscillation simulation feedback data to the host computer, and the host computer adjusts the configuration parameters of the controller of the broadband oscillation suppression device according to the broadband oscillation simulation feedback data; The controller of the adjusted wide-band oscillation suppression device sends an instruction to the interface card to request real-time data of the new energy system, and the real-time data is sent to the controller of the wide-band oscillation suppression device and the unit simulation card via the interface card; The controller of the broadband oscillation suppression device outputs a modulated wave signal according to real-time data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to real-time data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; The pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching devices in the main circuit simulation model of the broadband oscillation suppression device to generate test feedback data, and the target machine sends the test feedback data to the host computer, which evaluates the performance of the broadband oscillation suppression device based on the test feedback data.

2. The closed-loop test method of a broadband oscillation suppression device based on RT-LAB according to claim 1, characterized in that: In the host computer, the simulation parameters are adjusted according to the actual grid-connected scenario of the new energy system to simulate the broadband oscillation fault in the actual grid-connected scenario; the target machine performs simulation calculations to generate broadband oscillation simulation data based on the grid-connected test model and broadband oscillation simulation parameters sent by the host computer.

3. The closed-loop test method of a broadband oscillation suppression device based on RT-LAB according to claim 2, characterized in that: The interface board is connected to the target machine via a bus, the interface board is connected to the unit simulation board via Ethernet, and the controller of the broadband oscillation suppression device is connected to the unit simulation board via Ethernet.

4. The closed-loop test method of a broadband oscillation suppression device based on RT-LAB according to claim 3 is characterized in that: The controller of the broadband oscillation suppression device includes: a processor; when the processor sends an instruction to the interface card to request the target machine to generate broadband oscillation simulation data, the interface card sends the broadband oscillation simulation data to the processor through the ACP interface according to the instruction; the processor generates a modulated wave signal according to the broadband oscillation simulation data.

5. The closed-loop test method of a broadband oscillation suppression device based on RT-LAB according to claim 3 is characterized in that: The unit simulation board includes a control logic unit and a signal synthesis unit; wherein, the control logic of the main circuit simulation model is established in the control logic unit in a mapping manner, the broadband oscillation simulation data is transmitted to the control logic unit via the interface board, the control logic unit outputs a carrier signal according to the broadband oscillation simulation data, and the signal synthesis unit generates a pulse trigger signal for the switching device in the main circuit simulation model based on the carrier signal and the modulation wave signal.

6. The closed-loop test method of a broadband oscillation suppression device based on RT-LAB according to claim 5, characterized in that: The broadband oscillation simulation feedback data generated by the target machine according to the pulse trigger signal includes: the suppression current injected into the power grid by the broadband oscillation suppression device, the oscillation damping coefficient of the grid-connected test model, and the active power of each oscillation mode of the grid-connected test model.

7. The closed-loop test method of a broadband oscillation suppression device based on RT-LAB according to claim 6, characterized in that: The host computer verifies the effectiveness and correctness of the broadband oscillation suppression device in suppressing broadband oscillations based on the suppression current injected into the grid by the broadband oscillation suppression device according to the feedback of the target machine. The host computer adjusts the configuration parameters of the controller of the broadband oscillation suppression device and optimizes the installation position of the broadband oscillation suppression device based on the oscillation damping coefficient of the grid-connected test model and the active power of each oscillation mode fed back by the target machine and the tolerance of the grid-connected test model to the risk of broadband oscillations.

8. A closed-loop test system for a broadband oscillation suppression device based on RT-LAB using the method described in any one of claims 1 to 8, wherein the RT-LAB semi-physical simulation platform comprises a host computer, a target computer, an interface board and a unit simulation board, and is characterized in that: include: A wide-band oscillation simulation data generation module is used to establish a new energy system simulation model and configure simulation parameters in the host computer, establish a main circuit simulation model of the wide-band oscillation suppression device and configure simulation parameters; according to the grid-connected scenario of the new energy system, adjust the topological wiring of the new energy system simulation model, and connect the main circuit simulation model of the wide-band oscillation suppression device to the new energy system simulation model to obtain a grid-connected test model; the host computer sends the grid-connected test model and the wide-band oscillation simulation parameters to the target computer, and the target computer performs simulation calculations to generate wide-band oscillation simulation data; A wide-band oscillation suppression device setting module, used for the controller of the wide-band oscillation suppression device to send an instruction to request wide-band oscillation simulation data to the interface card, and the wide-band oscillation simulation data is sent to the controller of the wide-band oscillation suppression device via the interface card and the unit simulation card; The controller of the broadband oscillation suppression device outputs a modulated wave signal according to the broadband oscillation simulation data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to the broadband oscillation simulation data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; The pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switch device in the main circuit simulation model of the broadband oscillation suppression device to generate broadband oscillation simulation feedback data, and the target machine sends the broadband oscillation simulation feedback data to the host computer, and the host computer adjusts the configuration parameters of the controller of the broadband oscillation suppression device according to the broadband oscillation simulation feedback data; A wide-band oscillation suppression device test module is used for the controller of the wide-band oscillation suppression device after adjustment to send an instruction to the interface card to request real-time data of the new energy system, and the real-time data is sent to the controller of the wide-band oscillation suppression device and the unit simulation card via the interface card; The controller of the broadband oscillation suppression device outputs a modulated wave signal according to real-time data, and sends the modulated wave signal to the unit simulation board; the unit simulation board outputs a carrier signal according to real-time data based on the control logic of the main circuit simulation model, and generates a pulse trigger signal of the switch device in the main circuit simulation model based on the carrier signal and the modulated wave signal; The pulse trigger signal is sent to the target machine via the interface board; according to the pulse trigger signal, the target machine controls the opening and closing of the switching devices in the main circuit simulation model of the broadband oscillation suppression device to generate test feedback data, and the target machine sends the test feedback data to the host computer, which evaluates the performance of the broadband oscillation suppression device based on the test feedback data.

9. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

Images