Simulation method, device and equipment of black start technology, medium and product

Abstract

The invention relates to the technical field of network construction type energy storage, in particular to a black-start technology simulation method, device and equipment, a medium and a product, and the method comprises the steps: carrying out the simulation power failure processing of a built power system according to a preset target fault type; the energy storage converter is started, and parameters of the energy storage converter are adjusted according to the control strategy; starting the auxiliary converter, and adjusting parameters of the auxiliary converter according to the control strategy; when the energy storage converter and the auxiliary converter are in a stable output state, starting the electronic load, increasing the load of the electronic load according to a load recovery strategy, and continuously collecting operation data of the power system under different loads; and updating control strategies of the energy storage converter and the auxiliary converter and a load recovery strategy based on the operation data. The preset target fault type can cover a plurality of faults, and fault simulation and fault recovery are performed on each fault type one by one, so that the comprehensiveness of a simulation result can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of network construction type energy storage, in particular to a black start technology simulation method, device, equipment, medium and product. BACKGROUND

[0002] As a core function of network construction type energy storage, black start technology has been widely mentioned by researchers in the past two years. Black start technology refers to the process of using a generator set with self-starting capability to drive a generator set without self-starting capability to restore power to the entire power system.

[0003] The implementation of black start technology is an extremely complex, high-risk process that requires precise planning and repeated drills. Therefore, in order to accurately operate when the power system actually fails, related technologies usually use simulation experiment platforms to simulate black start technology. However, these simulation methods construct a single scene that is not realistic enough, can cover fewer types of faults, and have low accuracy and comprehensiveness of simulation results, which do not have practical guiding significance. SUMMARY

[0004] The present disclosure is proposed in view of the above problems, and provides a black start technology simulation method, device, equipment, medium and product.

[0005] According to one aspect of the present disclosure, a black start technology simulation method is provided, comprising: According to a preset target fault type, simulating a power system shutdown process; the power system comprises a energy storage converter, an auxiliary converter and an electronic load; Starting the energy storage converter and adjusting the parameters of the energy storage converter according to the control strategy of the energy storage converter; starting the auxiliary converter and adjusting the parameters of the auxiliary converter according to the control strategy of the auxiliary converter; When the energy storage converter and the auxiliary converter are in a stable output state, starting the electronic load, increasing the load of the electronic load according to a preset load recovery strategy, and continuously collecting operating data of the power system under different loads; Based on the operating data, updating the control strategies of the energy storage converter and the auxiliary converter, and the load recovery strategy.

[0006] In addition, the black start technology simulation method according to one aspect of the present disclosure further comprises that the auxiliary converter comprises a photovoltaic converter and / or a doubly-fed wind power converter; The control strategy of the photovoltaic converter is a maximum power point tracking strategy, the control strategy of the doubly-fed wind power converter is a speed control strategy, and the control strategy of the energy storage converter is a charge-discharge control strategy.

[0007] In addition, the simulation method of the black start technology according to an aspect of the present disclosure further comprises, after updating the control strategies of the energy storage converter and the auxiliary converter and the load recovery strategy based on the operation data: The step of simulating the power system under the preset target fault type is repeatedly performed until the recovery condition of the power system under the target fault type meets the preset condition.

[0008] In addition, the simulation method of the black start technology according to an aspect of the present disclosure further comprises, before updating the control strategies of the energy storage converter and the auxiliary converter and the load recovery strategy based on the operation data: When the load of the electronic load increases to meet the preset condition, the operation data of the power system is monitored to confirm that the power system is in a stable operation state.

[0009] In addition, the simulation method of the black start technology according to an aspect of the present disclosure further comprises: connecting the energy storage converter, the auxiliary converter and the electronic load to a simulation experiment platform, the connection including electrical connection and communication connection; Starting the simulation experiment platform, loading a preset scenario model of the black start technology, the scenario model including a topology structure diagram, parameters and a plurality of preset fault types of the energy storage converter, the auxiliary converter and the electronic load.

[0010] In addition, the simulation method of the black start technology according to an aspect of the present disclosure further comprises: recording and analyzing the collected operation data, the operation data including self data of the power system, operation parameters of the energy storage converter, the auxiliary converter and the electronic load; After the simulation ends, the connection of the energy storage converter, the auxiliary converter and the electronic load to the simulation experiment platform is cut off.

[0011] According to another aspect of the present disclosure, a simulation device of a black start technology is provided, comprising: A fault simulation module is configured to simulate a power system under a preset target fault type; the power system includes an energy storage converter, an auxiliary converter and an electronic load; A recovery simulation module is configured to start the energy storage converter and adjust parameters of the energy storage converter according to a control strategy of the energy storage converter; start the auxiliary converter and adjust parameters of the auxiliary converter according to a control strategy of the auxiliary converter; a load simulation module configured to start the electronic load when the energy storage converter and the auxiliary converter are in a steady output state, increase the load of the electronic load according to a preset load recovery strategy, and continuously collect operation data of the power system under different loads; a strategy optimization module configured to update a control strategy of the energy storage converter and the auxiliary converter and the load recovery strategy based on the operation data.

[0012] According to yet another aspect of the present disclosure, there is provided a computer device comprising a memory, a processor, and a computer program stored on the memory, the processor executing the computer program to implement the method of the above aspect.

[0013] According to yet another aspect of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program, the computer program being executed by a processor to implement the method of the above aspect.

[0014] According to yet another aspect of the present disclosure, there is provided a computer program product comprising a computer program, the computer program being executed by a processor to implement the method of the above aspect.

[0015] As will be described in detail below, the simulation method, device, equipment, medium and product of a black start technique according to embodiments of the present disclosure can cover a plurality of faults for a preset target fault type, and simulate and recover each fault type one by one, so as to obtain an operation optimization strategy of the power system under different fault types, which is conducive to improving the comprehensiveness of the simulation result. The electronic load can introduce random factors during simulation, such as switching the load type or sudden load switching (sudden load switching), for example, the influence of the impact load of a steel plant on the black start can be simulated, which can improve the scene authenticity of the built power system, and is conducive to improving the accuracy of the simulation result.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the subject technology. BRIEF DESCRIPTION OF DRAWINGS

[0017] The foregoing and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description, which proceeds with reference to the accompanying drawings. The accompanying drawings are provided to assist in understanding the present disclosure and constitute a part of the specification, which illustrate embodiments of the present disclosure, and together with the detailed description, serve to explain the present disclosure. The drawings do not limit the present disclosure, and are provided for purposes of explanation only. In the drawings, the same reference numbers generally indicate the same components or steps throughout the drawings.

[0018] Figure 1is a system architecture diagram illustrating an analog method of black start technology provided by an embodiment of the present disclosure.

[0019] Figure 2 is a flow chart illustrating an analog method of black start technology provided by an embodiment of the present disclosure.

[0020] Figure 3 is a topology structure diagram of an energy storage converter according to an embodiment of the present disclosure.

[0021] Figure 4 is a topology structure diagram of a doubly-fed wind power converter according to an embodiment of the present disclosure.

[0022] Figure 5 is a topology structure diagram of an electronic load according to an embodiment of the present disclosure.

[0023] Figure 6 is another flow chart illustrating an analog method of black start technology provided by an embodiment of the present disclosure.

[0024] Figure 7 is a structural schematic diagram of an analog device of black start technology according to an embodiment of the present disclosure.

[0025] Figure 8 is a structural schematic diagram of a computer device according to an embodiment of the present disclosure.

[0026] Figure 9 is a schematic diagram of a computer program product according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present disclosure more obvious, the following will describe the example embodiments according to the present disclosure in detail with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited by the example embodiments described herein.

[0028] Black start technology, as a core function of network-constructing energy storage technology, has been widely mentioned by researchers in the past two years. Black start technology refers to that the power grid drives the units without self-starting capability to generate power through the generator set with self-starting capability inside, and finally realizes the power recovery of the entire power system. Simply speaking, the purpose of black start is to start more power sources as quickly as possible, so as to restore more power generation capacity. The overall goal of power system recovery is to restore as much load as possible in the shortest possible time, which requires as many units as possible to restore power in the shortest possible time, so time and available power generation capacity are the factors that need to be considered first. The former reflects the speed of unit start, and the latter reflects how much load the unit can supply power.

[0029] The implementation of the black start technology is an extremely complex, high-risk, and precision-planned and repeatedly practiced process. Therefore, in order to accurately operate when the power system actually fails, the related technology usually uses a simulation experiment platform to simulate the black start technology. However, the scene constructed by these simulation methods is relatively single and does not fit the actual situation, can cover fewer fault types, and the accuracy and comprehensiveness of the simulation results are low, and do not have practical guiding significance.

[0030] The above describes a black start technology simulation method, device, equipment, medium and product according to an embodiment of the present disclosure with reference to the accompanying drawings, which can cover multiple fault types, simulate and recover each fault type one by one, and thus obtain the operation optimization strategy of the power system under different fault types, which is beneficial to improve the comprehensiveness of the simulation results. By using an electronic load, random factors can be introduced during simulation, such as switching the load type or suddenly switching on or off the load, for example, the influence of the switching on of the impact load of a steel plant on the black start can be simulated, which can improve the scene reality of the built power system and is beneficial to improve the accuracy of the simulation results.

[0031] Three combined scenes of the converter are provided: energy storage converter + photovoltaic converter, energy storage converter + doubly-fed wind power converter, and energy storage converter + photovoltaic converter + doubly-fed wind power converter. Different converter proportions can be put in to change the operation scene according to the pre-specified scene or the actual power system scene, to ensure the consistency of the simulation and the actual black start process.

[0032] In addition, multiple combined scenes can be integrated through a unified scene management platform to realize information interaction and collaborative control, and improve the comprehensiveness and accuracy of the simulation.

[0033] To facilitate the understanding of the present embodiment, first, a black start technology simulation method disclosed by the present embodiment is described in detail. The execution subject of the black start technology simulation method provided by the present embodiment is generally a computer device with certain computing power, which includes, for example, a terminal device or a server or other processing device. The terminal device can be a user equipment (User Equipment, UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device, a computing device, a vehicle-mounted device, a wearable device, etc. In some possible implementation manners, the black start technology simulation method can be realized by a processor calling computer readable instructions stored in a memory.

[0034] As Figure 1As shown in Fig. 1, which is a system architecture diagram of the simulation method of the black start technology provided by the embodiment of the present disclosure, the system architecture diagram includes a simulation experiment platform 1 and a built power system 2, wherein the power system 2 includes an energy storage converter 21, a photovoltaic converter 22, a doubly-fed wind power converter 23 and an electronic load 24, and the energy storage converter 21, the photovoltaic converter 22, the doubly-fed wind power converter 23 and the electronic load 24 are connected with the simulation experiment platform 1, including electrical connection and communication connection. A highly realistic black start scene is constructed through the built simulation experiment platform. The simulation experiment platform is composed according to the hardware framework and software structure on site, and after algorithm testing and optimization, the algorithm testing in the laboratory can be quickly transplanted to the existing site, and the test working condition on site can be perfectly reproduced.

[0035] Specifically, the scene can be according to a pre-specified scene, such as a black start single scene: a doubly-fed wind power converter, a photovoltaic converter, an energy storage converter, each single scene, or a black start joint scene: an energy storage converter + a doubly-fed wind power converter, an energy storage converter + a photovoltaic converter, an energy storage converter + a doubly-fed wind power converter + a photovoltaic converter. The scene can also be changed by inputting different converter ratios, dynamically adjusting the scene parameters, and ensuring the consistency of the experiment and the actual black start process. In addition, a multi-scene cooperative operation mechanism is established, the above multiple sub-scenes are integrated through a unified scene management platform, information interaction and cooperative control are realized, the comprehensiveness and accuracy of the simulation are improved, and the deficiencies of the traditional method are effectively solved, thereby providing a more effective experiment platform for testing and optimization of the black start strategy.

[0036] Specifically, the input ratio of the converter and the electronic load can be selected according to actual needs, and the embodiment is not limited, but in order to facilitate explanation and description, the power system of the embodiment includes 8 energy storage converters, 8 photovoltaic converters, 2 doubly-fed wind power converters and a set of 500KVA electronic load.

[0037] As shown in Fig. 1, which is a system architecture diagram of the simulation method of the black start technology provided by the embodiment of the present disclosure, the system architecture diagram includes a simulation experiment platform 1 and a built power system 2, wherein the power system 2 includes an energy storage converter 21, a photovoltaic converter 22, a doubly-fed wind power converter 23 and an electronic load 24, and the energy storage converter 21, the photovoltaic converter 22, the doubly-fed wind power converter 23 and the electronic load 24 are connected with the simulation experiment platform 1, including electrical connection and communication connection. A highly realistic black start scene is constructed through the built simulation experiment platform. The simulation experiment platform is composed according to the hardware framework and software structure on site, and after algorithm testing and optimization, the algorithm testing in the laboratory can be quickly transplanted to the existing site, and the test working condition on site can be perfectly reproduced. Figure 2 As shown in Fig. 1, which is a system architecture diagram of the simulation method of the black start technology provided by the embodiment of the present disclosure, the system architecture diagram includes a simulation experiment platform 1 and a built power system 2, wherein the power system 2 includes an energy storage converter 21, a photovoltaic converter 22, a doubly-fed wind power converter 23 and an electronic load 24, and the energy storage converter 21, the photovoltaic converter 22, the doubly-fed wind power converter 23 and the electronic load 24 are connected with the simulation experiment platform 1, including electrical connection and communication connection. A highly realistic black start scene is constructed through the built simulation experiment platform. The simulation experiment platform is composed according to the hardware framework and software structure on site, and after algorithm testing and optimization, the algorithm testing in the laboratory can be quickly transplanted to the existing site, and the test working condition on site can be perfectly reproduced. Figure 1 As shown in Fig. 1, which is a system architecture diagram of the simulation method of the black start technology provided by the embodiment of the present disclosure, the system architecture diagram includes a simulation experiment platform 1 and a built power system 2, wherein the power system 2 includes an energy storage converter 21, a photovoltaic converter 22, a doubly-fed wind power converter 23 and an electronic load 24, and the energy storage converter 21, the photovoltaic converter 22, the doubly-fed wind power converter 23 and the electronic load 24 are connected with the simulation experiment platform 1, including electrical connection and communication connection. A highly realistic black start scene is constructed through the built simulation experiment platform. The simulation experiment platform is composed according to the hardware framework and software structure on site, and after algorithm testing and optimization, the algorithm testing in the laboratory can be quickly transplanted to the existing site, and the test working condition on site can be perfectly reproduced. S201: Building a power system.

[0038] The main function is to build a black start scene, including 8 energy storage converters, 8 photovoltaic converters, 2 doubly-fed wind power converters and a set of 500KVA electronic load.

[0039] First, correctly connect all devices to the corresponding interfaces on the simulation platform, including electrical and communication connections, ensuring normal communication and collaborative operation between devices. Configure the parameters of the electronic loads, setting their initial load state and subsequent load recovery strategy according to requirements. Second, start the simulation platform and load the pre-designed black-start technology scenario model. The scenario model includes the topology diagram, parameters, and preset fault types of the energy storage converter, auxiliary converter, and electronic loads. Finally, initialize all converters, including the charging and discharging strategies of the energy storage converter, the maximum power point tracking (MPPT) strategy of the photovoltaic converter, and the speed control strategy of the doubly-fed wind power converter, ensuring all devices are in standby mode. Start the data acquisition system to monitor key operating data of the power system such as voltage, current, frequency, and power in real time during the simulation.

[0040] Regarding each piece of equipment, specifically: (1) Energy storage converter: refer to Figure 3 The diagram shows the topology of the energy storage converter. The converter uses an Active Neutral Point Clamped (ANPC) topology and has an LCL filter at the output. The LCL filter contains five sets of capacitors, one of which is routed back to the midpoint of the DC bus. The rated grid voltage is 380V, the rated power is 40kW, and the maximum DC current is 50A.

[0041] For low-voltage, low-power energy storage converter systems, the filtering parameters of their main circuit are shown in Table 1: Table 1. Filtering Parameters of Energy Storage Converter

[0042] Regarding the battery for the energy storage converter, this embodiment uses a lithium iron phosphate battery, and the specific parameters are shown in Table 2: Table 2 Battery parameters of the energy storage converter

[0043] (2) Photovoltaic converter: The parameters of the photovoltaic converter are consistent with the parameters of the energy storage converter, on the basis of which, a DC / DC circuit (the DC / DC module adopts a symmetrical topology) and an input filter link are added to the left side of the DC bus capacitor. In addition, a Keweisheng DC power supply is used as the DC side input of the photovoltaic converter. The DC power supply supports the simulation of the I-V curve of a solar cell. The I-V curve of different types of solar cell arrays (single crystal, polycrystal, thin film, etc.) can be simulated; the I-V curve under different temperatures and light intensities can be simulated; the I-V curve of a partially shaded photovoltaic array can be simulated; and the I-V curve under scaled all-day sunlight changes can be simulated. The simulation function of different material cells is supported.

[0044] (3) Doubly-fed wind power converter: Referring to Figure 4 the topological structure diagram of the doubly-fed wind power converter, the machine-side inverter and the grid-side inverter of the doubly-fed wind power converter both adopt an ANPC topology or a Neutral Point Clamped (NPC) topology, the grid-side output is provided with LC filtering, the machine-side (i.e., the stator side) output is provided with single-inductor filtering, and the intermediate DC side is provided with a chopper circuit and a pre-charge circuit. The rated voltage is 380V, the rated power is 30kW, and the DC voltage is not lower than 500V.

[0045] (4) Electronic load: Referring to Figure 5 the topological structure diagram of the electronic load, a controllable electronic load is used as the load, 500kVA four-quadrant converters are connected in parallel, an AC side is connected to a 690V test bus and a 380V auxiliary test bus, a load of 0-500kVA can be simulated, and a 500kVA controllable electronic load is additionally configured as a backup in this embodiment.

[0046] The rated input voltage of the controllable electronic load is 3AC 100-1200V, the output voltage range is 3AC 380V±10%, the input frequency range is 40Hz-70Hz, the power factor is adjustable: -1-1, the simulation of R, RL or RC loads can be realized, and the controllable electronic load has operation modes such as constant current, constant resistance, constant power and step mode.

[0047] During the experiment, random factors can be introduced by using the electronic load, such as load type switching or sudden switching, for example, the impact of the input of the impact load of a steel plant on black start, so that the power system built is closer to the actual situation.

[0048] S202: Fault simulation.

[0049] According to the designed fault types, various power grid faults are simulated one by one on the simulation experiment platform, the connection with the external power grid is gradually cut off, and the power system enters a complete power failure state. At the same time, the state parameters before the power failure of the power system are recorded, including the operating state of each device, the voltage, current, frequency of the power grid, etc., providing a reference for subsequent analysis. While simulating the fault, the operation of the power system is monitored, and the changes in the operating data of the power system are recorded, including voltage, frequency, power, etc. Through monitoring the operating data, the stability and recovery ability of the power system under fault conditions are analyzed.

[0050] The fault types mainly include power supply side faults, load side faults and communication control faults, specifically: (1) Power supply side fault: Energy storage converter fault: simulate internal faults of the energy storage converter (such as power module damage, control board failure, etc.), which causes the energy storage system to be unable to normally output power. For example, by cutting off the control signal of the energy storage converter or simulating its internal component failure, the response of the system when losing energy storage support is observed.

[0051] Photovoltaic converter fault: simulate the photovoltaic converter unable to work normally due to insufficient light (such as simulating night or overcast conditions), self-failure (such as inverter overheat protection action), etc. It can be simulated by adjusting the output power of the photovoltaic simulator or directly cutting off the input of the photovoltaic converter.

[0052] Double-fed wind power converter fault: simulate the double-fed wind power converter unable to generate electricity normally due to low wind speed (simulate no wind or light wind conditions), self-failure (such as converter cooling system failure), etc. It can be simulated by adjusting the wind speed simulation device or cutting off the input of the wind power converter.

[0053] (2) Load side fault: Electronic load fault: simulate the influence of sudden increase or decrease of load (such as simulating the sudden start or stop of factory equipment) on the stability of the power system. It can be simulated by quickly changing the size of the electronic load.

[0054] Load short circuit fault: simulate the short circuit fault of the electronic load, and observe the protection action and recovery of the power system. It can be simulated by setting a short circuit switch on the electronic load side.

[0055] (3) Communication control fault: Communication link fault: simulate the interruption of communication links between the energy storage converter, photovoltaic converter, double-fed wind power converter and electronic load, which causes the power system to be unable to normally coordinate control. It can be simulated by cutting off the communication line or simulating communication interference.

[0056] Control instruction failure: The control center sends incorrect or delayed instructions, causing the device (energy storage converter, etc.) to fail to respond correctly. This can be simulated by delaying or sending incorrect control instructions.

[0057] S203: Simulation and testing of the recovery phase.

[0058] According to the designed recovery phase, the recovery operation is carried out step by step. First, start the energy storage converter to provide initial power for the system; then gradually start the photovoltaic converter and the doubly-fed wind power converter to adjust their output power; finally, gradually restore the controllable electronic load and observe the operation of the power system under different loads. In the recovery process, real-time monitoring of the operation data of the power system is carried out, and the changes of voltage, frequency, power and other parameters are recorded. By analyzing the operation data of the power system, the control strategy is optimized to improve the recovery efficiency and stability of the power system. Specifically, the recovery phase includes: (1) Initial start-up phase: Energy storage system priority start: Take advantage of the fast response characteristics of the energy storage system, first start the energy storage converter to provide initial power for the power system, and stabilize the voltage and frequency of the power system. The energy storage system can quickly charge and discharge to support the start-up of other devices.

[0059] Photovoltaic and wind power system auxiliary start: After the energy storage system starts, gradually start the photovoltaic converter and the doubly-fed wind power converter. According to the light and wind speed conditions, adjust the output power of photovoltaic and wind power to gradually join the power system.

[0060] (2) Stable phase: Power balance adjustment: Through the charge and discharge control of the energy storage converter, the power regulation of the photovoltaic converter and the power output adjustment of the wind power converter, the dynamic balance of the power system power is realized. The energy storage system can charge and discharge according to the system power demand, and the photovoltaic and wind power system can output power according to its own power generation capacity.

[0061] Frequency and voltage control: Use the fast regulation ability of the energy storage converter to stabilize the frequency and voltage of the power system. The energy storage converter can quickly adjust the charge and discharge power according to the changes of the frequency and voltage of the power system to maintain the stability of the power system.

[0062] (3) Load recovery phase: After the energy storage converter, photovoltaic converter and wind power converter can stably output a certain power, gradually restore the load of the electronic load. According to the pre-set load recovery strategy, increase the load in stages and regions, while monitoring the voltage, current and frequency changes of the power system.

[0063] If the system voltage or frequency fluctuation exceeds the allowed range during the load recovery phase, timely adjust the charge and discharge power of the energy storage converter or adjust the output power of the photovoltaic converter and wind power converter to maintain the stable operation of the power system.

[0064] Optionally, the priority of load recovery can also be set according to the importance and emergency level of the load.

[0065] S204: Optimization and improvement of the power system.

[0066] After all the loads are recovered, the operating state of the power system is continuously monitored to ensure that the power system can operate stably for a period of time. Then, the charge and discharge strategy of the energy storage converter, the MPPT strategy of the photovoltaic converter, the speed control strategy of the doubly-fed wind power converter, and the load recovery strategy are optimized and adjusted according to the operating data of the power system to improve the stability and economy of the power system.

[0067] The fault simulation and recovery test are repeated to verify the effectiveness of the optimization and improvement measures, and to ensure that the power system can achieve fast and stable recovery under various fault conditions.

[0068] S205: Data recording and analysis.

[0069] After the simulation ends, the operating data collected during the simulation process are sorted and analyzed, including the change curves of the voltage, current, frequency, and power of the power system, and the operating state of each device and the adjustment of the control strategy. Through data analysis, the effectiveness of the black start technology is evaluated, and the problems and deficiencies in the simulation process are found out to provide a basis for subsequent scheme optimization.

[0070] Finally, all the devices are restored to the initial state, and the connection with the simulation experiment platform is cut off. All the devices are comprehensively checked to ensure that the devices do not appear damaged or faulty during the simulation process, and are prepared for the next simulation. Optionally, according to the simulation process and the data analysis results, a detailed simulation report is written, including the simulation purpose, simulation steps, simulation results, existing problems and improvement suggestions, etc., to provide a reference for the research and application of the black start technology.

[0071] As shown in FIG. 6, Figure 6 FIG. 6 is another flowchart of the simulation method of the black start technology provided by the embodiment of the present disclosure, and the method comprises S601-S604: S601: According to the preset target fault type, the simulated power outage treatment is performed on the built power system.

[0072] The power system comprises an energy storage converter, an auxiliary converter, and an electronic load, S602: start the energy storage converter and adjust parameters of the energy storage converter according to a control strategy of the energy storage converter; start the auxiliary converter and adjust parameters of the auxiliary converter according to a control strategy of the auxiliary converter; S603: when the energy storage converter and the auxiliary converter are in a stable output state, start the electronic load, increase the load of the electronic load according to a preset load recovery strategy, and continuously collect operation data of the power system under different loads; S604: update the control strategies of the energy storage converter and the auxiliary converter and the load recovery strategy based on the operation data.

[0073] In one or more embodiments, the auxiliary converter includes a photovoltaic converter and / or a doubly-fed wind power converter; the control strategy of the photovoltaic converter is a maximum power point tracking strategy, the control strategy of the doubly-fed wind power converter is a speed control strategy, and the control strategy of the energy storage converter is a charge-discharge control strategy.

[0074] In one or more embodiments, after S604, the method further includes: repeatedly performing the step of simulating power outage processing on the built power system according to a preset target fault type until the recovery condition of the power system under the target fault type meets a preset condition.

[0075] In one or more embodiments, before S604, the method further includes: monitoring operation data of the power system when the load of the electronic load is increased to meet a preset condition, and confirming that the power system is in a stable operation state.

[0076] In one or more embodiments, the method further includes: connecting the energy storage converter, the auxiliary converter, and the electronic load to a simulation experiment platform; starting the simulation experiment platform and loading a preset scene model of the black start technology. The connection includes electrical connection and communication connection, and the scene model includes a topology structure diagram, parameters, and a plurality of preset fault types of the energy storage converter, the auxiliary converter, and the electronic load.

[0077] In one or more embodiments, the method further includes: recording and analyzing the collected operation data, wherein the operation data includes self-data of the power system, operation parameters of the energy storage converter, the auxiliary converter, and the electronic load; and disconnecting the energy storage converter, the auxiliary converter, and the electronic load from the simulation experiment platform after the simulation ends.

[0078] According to another aspect of the embodiments of the present disclosure, a simulation device for a black start technology is provided, as shown in Figure 7 The device includes: a fault simulation module 701 configured to simulate power outage processing on a built power system according to a preset target fault type; the power system includes an energy storage converter, an auxiliary converter, and an electronic load; The simulation recovery module 702 is used to start the energy storage converter and adjust its parameters according to the control strategy of the energy storage converter; and to start the auxiliary converter and adjust its parameters according to the control strategy of the auxiliary converter. The load simulation module 703 is used to start the electronic load when the energy storage converter and the auxiliary converter are in a stable output state, increase the load of the electronic load according to a preset load recovery strategy, and continuously collect the operating data of the power system under different loads. The strategy optimization module 704 is used to update the control strategy of the energy storage converter and the auxiliary converter, as well as the load recovery strategy, based on the operating data.

[0079] The black start technology simulation device and the black start technology simulation method provided in this disclosure are based on the same inventive concept and have the same beneficial effects as the methods they adopt, operate or implement.

[0080] This disclosure also provides a computer device for executing the above-described black boot technique simulation method. Please refer to... Figure 8 It illustrates a schematic diagram of a computer device provided by some embodiments of this disclosure. For example... Figure 8 As shown, the computer device 8 includes: a processor 800, a memory 801, a bus 802, and a communication interface 803. The processor 800, the communication interface 803, and the memory 801 are connected via the bus 802. The memory 801 stores a computer program that can run on the processor 800. When the processor 800 runs the computer program, it executes the simulation method of the black boot technology provided in any of the foregoing embodiments of this disclosure.

[0081] The memory 801 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this device network element and at least one other network element is achieved through at least one communication interface 803 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0082] The bus 802 can be an ISA bus, a PCI bus, an EISA bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. The memory 801 is configured to store programs, and the processor 800 executes the programs after receiving execution instructions. The simulation method of the black start technology according to any of the embodiments of the present disclosure can be applied to the processor 800 or implemented by the processor 800.

[0083] The processor 800 can be an integrated circuit chip with processing capability. In the implementation process, the steps of the above method can be completed by the integrated logic circuit of the hardware in the processor 800 or the instructions in the form of software. The processor 800 described above can be a general processor, including a central processing unit (CPU), a network processor (NP), and the like; can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps, and logic block diagrams in the embodiments of the present disclosure can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present disclosure can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory, an electrically erasable programmable memory, a register, or other mature storage medium in the art. The storage medium is located in the memory 801, and the processor 800 reads the information in the memory 801 and combines the hardware to complete the steps of the above method.

[0084] The computer device provided by the embodiments of the present disclosure and the simulation method of the black start technology provided by the embodiments of the present disclosure have the same beneficial effects as the method they adopt, run or implement.

[0085] The embodiments of the present disclosure also provide a computer readable storage medium corresponding to the simulation method of the black start technology provided by the foregoing embodiments. The computer readable storage medium is an optical disc, and a computer program (i.e., a computer program product) is stored on the optical disc. When the computer program is run by a processor, the simulation method of the black start technology provided by any of the foregoing embodiments is executed.

[0086] It should be noted that examples of the computer-readable storage medium can also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical, magnetic storage media, and the like, which will not be listed one by one here.

[0087] The computer-readable storage medium provided by the above embodiments of the present disclosure has the same beneficial effects as the method adopted, run or implemented by the application program stored therein, based on the same inventive concept as the simulation method of the black start technology provided by the embodiments of the present disclosure.

[0088] The embodiments of the present disclosure also provide a computer program product, please refer to Figure 9 The computer program product 900 carries a program code, that is, a computer program 901, and the instructions included in the computer program 901 can be used to execute the steps of the simulation method of the black start technology described in the above method embodiments. For details, please refer to the above method embodiments, which will not be repeated here.

[0089] The computer program product can be specifically implemented by hardware, software or a combination thereof. In one optional embodiment, the computer program product is specifically embodied as a computer storage medium, and in another optional embodiment, the computer program product is specifically embodied as a software product, such as a software development kit (Software Development Kit, SDK) and the like.

[0090] The basic principles of the present disclosure are described above in combination with specific embodiments, but it should be noted that the advantages, advantages, effects and the like mentioned in the present disclosure are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present disclosure. In addition, the above specific details are only for the purpose of example and understanding, and are not limited to the specific details disclosed above.

[0091] The block diagrams of devices, apparatuses, equipment, systems referred to in the present disclosure are merely illustrative examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagrams. These devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner as will be appreciated by those skilled in the art. Words such as "include," "contain," "have," etc. are open-ended words that are to be interpreted to mean "including but not limited to," and are to be interpreted not to exclude other items. The words "or" and "and" as used herein are to be interpreted as the word "and / or," and are to be interpreted not to exclude other items. The word "such as" as used herein is to be interpreted as the phrase "such as but not limited to," and is to be interpreted not to exclude other items.

[0092] In addition, as used herein, the "or" as used in the context "at least one of A, B, or C" : means A or B or C or any combination thereof. Further, the phrase "example of" is used to indicate an example, and not an exhaustive list of possible implementations. Further, the phrase "one or more of" is used to indicate that there is one or more of the listed items, and is not to be interpreted as one of or any single item from the listed items.

[0093] It is also important to note that the systems and methods of the present disclosure can be embodied in a variety of forms including, but not limited to, a data processor, a computer program product, a computer, one or more components of a computer, software, and combinations thereof. Furthermore, the systems and methods of the present disclosure can be used with any device, apparatus, equipment, system, or combination thereof that is capable of utilizing the teachings of the present disclosure.

[0094] Various changes, modifications and improvements in the herein described technologies can be made within the teachings of the technology, which are defined by the appended claims. Further, the scope of the claims of the present disclosure is not limited to the specific aspects described herein. The process, machine, manufacture, composition of matter, means, methods, and steps for accomplishing the same, as described herein, can be substituted with other equally effective processes, machines, manufactures, compositions of matter, means, methods, or steps for accomplishing substantially the same functions without departing from the scope of the present disclosure. Accordingly, the appended claims are intended to cover all such processes, machines, manufactures, compositions of matter, means, methods, or steps. The claims of the present disclosure are intended to cover each and every combination of features from the aspects described herein.

[0095] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0096] The foregoing description has been presented for the purposes of illustration and description. Furthermore, the description is not intended to limit the embodiments of the disclosure to the forms disclosed herein. Although the various example aspects and embodiments have been described herein with regard to particular aspects and embodiments, those skilled in the art will recognize that certain modifications, changes, substitutions, additions and sub-combinations can be made without departing from the spirit of the disclosure.

Claims

1. A simulation method for black start technology, characterized in that, include: Based on the preset target fault type, simulate power outage processing is performed on the constructed power system; The power system includes an energy storage converter, an auxiliary converter, and electronic loads; Start the energy storage converter and adjust its parameters according to its control strategy. Start the auxiliary converter and adjust its parameters according to its control strategy. When the energy storage converter and the auxiliary converter are in a stable output state, the electronic load is started, the load of the electronic load is increased according to the preset load recovery strategy, and the operating data of the power system under different loads are continuously collected. Based on the operational data, update the control strategies for the energy storage converter and the auxiliary converter, as well as the load recovery strategy.

2. The simulation method for black-start technology as described in claim 1, characterized in that, Also includes: The auxiliary converter includes a photovoltaic converter and / or a doubly fed wind power converter; The control strategy for the photovoltaic converter is a maximum power point tracking strategy, the control strategy for the doubly-fed wind power converter is a speed control strategy, and the control strategy for the energy storage converter is a charge-discharge control strategy.

3. The simulation method for black-start technology as described in claim 1, characterized in that, After updating the control strategies for the energy storage converter and the auxiliary converter, as well as the load recovery strategy, based on the operational data, the method further includes: Repeat the steps of simulating a power outage on the constructed power system according to the preset target fault type until the recovery status of the power system under the target fault type meets the preset conditions.

4. The simulation method for black-start technology as described in claim 1, characterized in that, Before updating the control strategies for the energy storage converter and the auxiliary converter, as well as the load recovery strategy, based on the operational data, the following steps are included: When the load of the electronic load increases to meet the preset conditions, the operating data of the power system is monitored to confirm that the power system is in a stable operating state.

5. The simulation method for black-start technology as described in claim 1, characterized in that, Also includes: The energy storage converter, auxiliary converter, and electronic load are connected to the simulation experimental platform, and the connection includes electrical connection and communication connection. The simulation platform is started and a preset black-start technology scenario model is loaded. The scenario model includes the topology diagram, parameters, and preset fault types of the energy storage converter, auxiliary converter, and electronic load.

6. The simulation method for black-start technology as described in claim 1, characterized in that, Also includes: The collected operational data is recorded and analyzed, including the power system's own data and the operating parameters of the energy storage converter, auxiliary converter, and electronic loads. After the simulation is completed, disconnect the energy storage converter, auxiliary converter, and electronic load from the simulation experimental platform.

7. A simulation device for black-start technology, characterized in that, include: The fault simulation module is used to simulate power outages in the constructed power system based on preset target fault types. The power system includes an energy storage converter, an auxiliary converter, and electronic loads; The simulation recovery module is used to start the energy storage converter and adjust the parameters of the energy storage converter according to the control strategy of the energy storage converter. Start the auxiliary converter and adjust its parameters according to its control strategy. The load simulation module is used to start the electronic load when the energy storage converter and the auxiliary converter are in a stable output state, increase the load of the electronic load according to a preset load recovery strategy, and continuously collect the operating data of the power system under different loads. The strategy optimization module is used to update the control strategies of the energy storage converter and the auxiliary converter, as well as the load recovery strategy, based on the operating data.

8. A computer embedded device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1 to 6.

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