Active voltage-regulated dynamic mode test device and method

Abstract

The application provides an active voltage regulation dynamic model test device and method, which comprises an active voltage regulator, a power grid disturbance device and a DC power transmission simulation system, wherein the power grid disturbance device is used to generate disturbance or simulate fault and apply the disturbance or fault on the DC power transmission simulation system; the active voltage regulator is used to adjust the winding voltage when the power grid disturbance device generates disturbance or simulates fault, and deliver the adjusted voltage to the DC power transmission simulation system for transmission; the DC power transmission simulation system comprises a thyristor cooling / heating system, which is used to control the temperature of the thyristor devices in the rectifier bridge and the inverter bridge in the DC power transmission simulation system, so as to simulate the turn-off time of the thyristor in the actual high-voltage DC power transmission system. Through the implementation of the application, the ability of the active voltage regulator to stably regulate voltage and quickly compensate for single-phase / two-phase / three-phase voltage drop fault in transient state is verified.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power electronics, in particular to an active voltage regulation dynamic model test device and method. BACKGROUND

[0002] In a high-voltage direct-current transmission system, the valve-side voltage needs to be adjusted by the on-load tap changer of the converter transformer to ensure the safety and economy of the direct-current system. Currently, mechanical on-load tap changers are used. Due to the extremely complex mechanical structure of the tap changer and the frequent adjustment of the tap position, there is a risk of inter-turn short circuit of the converter transformer, which can easily cause various mechanical failures. Due to the response speed of the existing mechanical tap changer, when the valve-side voltage drops due to the failure of the inverter of the direct-current system, the tap changer cannot immediately respond to increase the valve-side voltage, resulting in commutation failure and affecting the safe operation of the direct-current transmission.

[0003] With the large-scale construction of ultra / extra-high voltage AC / DC transmission projects and the rapid development of FACTS technology, in view of the problems of mechanical on-load tap changer tap regulation, the technical advantages and foundation of the high-voltage and high-capacity power electronics field are fully utilized to explore an amplitude regulation technology based on power electronics. The fast response characteristics of power electronics can quickly support the commutation voltage of the converter valve when the system voltage is low, solve the inherent problem of commutation failure of the direct-current transmission system, and greatly improve the operation reliability of the direct-current system.

[0004] In order to verify the effectiveness of the active voltage regulation principle and the voltage regulation effect, the existing software simulation method cannot accurately simulate the commutation process in the direct-current system and verify the effect of active voltage regulation compensation for commutation failure. Direct verification in a high-voltage direct-current transmission system has economic and safety problems. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to overcome the defect that the active voltage regulation technical scheme and function cannot be verified accurately in the prior art, and to provide an active voltage regulation dynamic model test device and method.

[0006] To achieve the above purpose, the present application provides the following technical scheme:

[0007] In a first aspect, an embodiment of the present application provides an active voltage regulating dynamic model test device, comprising: an active voltage regulator, a power grid disturbance device, and a DC power transmission simulation system, wherein the power grid disturbance device is configured to generate a disturbance or simulate a fault and apply the disturbance or fault to the DC power transmission simulation system; the active voltage regulator is configured to adjust its winding voltage when the power grid disturbance device generates a disturbance or simulates a fault, and transmit the adjusted voltage to the DC power transmission simulation system for transmission; and the DC power transmission simulation system comprises a thyristor cooling / heating system configured to control the temperature of thyristor devices in rectifier bridges and inverter bridges in the DC power transmission simulation system, so as to simulate the turn-off time of thyristors in an actual HVDC power transmission system.

[0008] Optionally, the active voltage regulator comprises a main transformer and a voltage regulating converter, and the voltage regulating converter is connected in series between the neutral point of the high-voltage winding of the main transformer and the ground.

[0009] Optionally, the active voltage regulator comprises a rectifier-end active voltage regulator and an inverter-end active voltage regulator, wherein the rectifier-end active voltage regulator and / or the inverter-end active voltage regulator is configured to adjust the voltage of each winding of the main transformer by adjusting the output voltage of the voltage regulating converter when the power grid disturbance device generates a disturbance or simulates a fault, and transmit the adjusted voltage to the DC power transmission simulation system for transmission.

[0010] Optionally, the power grid disturbance device comprises a rectifier-end power grid disturbance device and an inverter-end power grid disturbance device, wherein the rectifier-end power grid disturbance device is configured to generate a disturbance or simulate a fault and apply the disturbance or fault to the rectifier end of the DC power transmission simulation system; and the inverter-end power grid disturbance device is configured to generate a disturbance or simulate a fault and apply the disturbance or fault to the inverter end of the DC power transmission simulation system.

[0011] Optionally, the main transformer comprises a high-voltage winding, a low-voltage winding, and a voltage regulating winding, and the voltage regulating winding provides energy for the voltage regulating converter.

[0012] Optionally, the voltage regulating converter comprises a power-taking transformer, a converter module, and a fast bypass module, wherein the secondary side winding of the power-taking transformer, the converter module, and the fast bypass module are sequentially connected in order; and the primary side winding of the power-taking transformer is connected to the voltage regulating winding.

[0013] Optionally, the converter module comprises one converter submodule or a plurality of cascaded converter submodules; the converter submodule adopts an H-bridge or a multi-level structure; and the power devices used by the converter submodule include IGBT devices, silicon carbide devices, and IGCT devices.

[0014] Optionally, the power taking transformer adopts a multi-winding structure for connecting to multiple converter sub-modules.

[0015] Optionally, the fast bypass module includes one fast bypass sub-module or multiple cascaded fast bypass sub-modules; the fast bypass sub-module includes a mechanical switch and a first power electronic device in anti-parallel connection; the power device used by the first power electronic device includes a thyristor device and an IGBT device.

[0016] Optionally, the converter sub-module is connected to the fast bypass sub-module in one-to-one correspondence; the other end of the fast bypass sub-module is connected between the neutral point of the high-voltage winding of the main transformer and the ground through series connection.

[0017] Optionally, the DC power transmission simulation system further includes a rectifier bridge, an inverter bridge, a first smoothing reactor, a second smoothing reactor, a DC circuit breaker, a first filter circuit, and a second filter circuit; the rectifier end grid disturbance device, the main transformer in the rectifier end active voltage regulator, the rectifier bridge, the first smoothing reactor, the DC circuit breaker, the second smoothing reactor, the inverter bridge, the main transformer in the inverter end active voltage regulator, and the inverter end grid disturbance device are sequentially connected in order; the other end of the rectifier end grid disturbance device is connected to the rectifier end of the test power supply through an AC circuit breaker; the other end of the inverter end grid disturbance device is connected to the inverter end of the test power supply through an AC circuit breaker; the first filter circuit is connected in parallel between the first smoothing reactor and the DC circuit breaker and is connected to the DC power transmission simulation system; and the second filter circuit is connected in parallel between the second smoothing reactor and the DC circuit breaker and is connected to the DC power transmission simulation system.

[0018] Optionally, the rectifier bridge and the inverter bridge each include an absorption circuit and a second power electronic device; the absorption circuit is connected in parallel to the second power electronic device; the power device used by the second power electronic device includes a thyristor device and an IGBT device.

[0019] Optionally, the active voltage regulation dynamic model test device further includes a control and protection system connected to the rectifier end grid disturbance device, the inverter end grid disturbance device, the rectifier end active voltage regulator, the inverter end active voltage regulator, the rectifier bridge, and the inverter bridge; the control and protection system is used to collect operating parameters of the active voltage regulation dynamic model test device, control the rectifier end grid disturbance device, the inverter end grid disturbance device, the rectifier end active voltage regulator, the inverter end active voltage regulator, the rectifier bridge, and the inverter bridge according to the operating parameters, and perform overvoltage and overcurrent protection for each circuit.

[0020] In a second aspect, an embodiment of the present application provides an active voltage regulation dynamic model test method based on the active voltage regulation dynamic model test device of the first aspect of the present application, and the active voltage regulation dynamic model test method comprises:

[0021] The power grid disturbance device generates a disturbance or simulates a fault, and applies the disturbance or fault on the DC power transmission simulation system; when the power grid disturbance device generates a disturbance or simulates a fault, the winding voltage of the active voltage regulator is adjusted, and the adjusted voltage is transmitted to the DC power transmission simulation system for transmission; the thyristor cooling / heating system is used to control the temperature of the thyristor devices in the rectifier bridge and the inverter bridge in the DC power transmission simulation system, so as to simulate the turn-off time of the thyristor in the actual high-voltage DC power transmission system.

[0022] In a third aspect, an embodiment of the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions are used to make the computer execute the active voltage regulation dynamic model test method of the first aspect of the present application.

[0023] In a fourth aspect, an embodiment of the present application provides a computer device, which comprises a memory and a processor, the memory and the processor are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to execute the active voltage regulation dynamic model test method of the first aspect of the present application.

[0024] The technical scheme of the present application has the following advantages:

[0025] The active voltage regulation dynamic model test device provided by the present application comprises an active voltage regulator, a power grid disturbance device and a DC power transmission simulation system, wherein the power grid disturbance device is used to generate a disturbance or simulate a fault, and apply the disturbance or fault on the DC power transmission simulation system; the active voltage regulator is used to adjust the winding voltage when the power grid disturbance device generates a disturbance or simulates a fault, and transmit the adjusted voltage to the DC power transmission simulation system for transmission; the DC power transmission simulation system comprises a thyristor cooling / heating system, and the thyristor cooling / heating system is used to control the temperature of the thyristor devices in the rectifier bridge and the inverter bridge in the DC power transmission simulation system, so as to simulate the turn-off time of the thyristor in the actual high-voltage DC power transmission system.

[0026] The disturbance is generated by using a power grid disturbance device to simulate the rise and fall of grid voltage, various faults of the grid and AC system impedance. The voltage regulating function of the active voltage regulator under steady state and transient fault of the high voltage DC system is simulated to verify the ability of the active voltage regulator to compensate for the steady state voltage and the transient single-phase / two-phase / three-phase voltage drop. The junction temperature of the thyristor valve in the heating control DC transmission system is used to simulate the large current commutation process of the thyristor valve in the actual DC project in the laboratory. The turn-off time of the thyristor can be flexibly controlled at different junction temperatures, which has the advantages of high simulation accuracy, simple operation, safety and economy. The active voltage regulating device is established in the high voltage DC transmission transformer by using the technical advantages of power electronic non-arc switching, flexible control, fast response and unlimited action times. The amplitude and phase of the active voltage regulating device can be flexibly adjusted, which can quickly support the commutation voltage of the converter valve under low voltage of the system, and greatly improves the operation reliability of the DC system. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 A principle block diagram of a specific example of the active voltage regulating dynamic model test device in the embodiments of the present application;

[0029] Figure 2 A principle block diagram of another specific example of the active voltage regulating dynamic model test device in the embodiments of the present application;

[0030] Figure 3 A topology structure diagram of the voltage regulating converter in the embodiments of the present application;

[0031] Figure 4 A topology diagram of the rectifier bridge in the embodiments of the present application;

[0032] Figure 5 A topology diagram of the inverter bridge in the embodiments of the present application;

[0033] Figure 6 A flowchart of a specific example of the active voltage regulating dynamic model test method in the embodiments of the present application;

[0034] Figure 7 A composition diagram of a specific example of the computer device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements; it can be wireless connection, or it can be wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0039] The embodiment of the present application provides an active voltage regulation dynamic model test device, as shown in the figure, comprising: an active voltage regulator, a power grid disturbance device and a DC power transmission simulation system. Figure 1

[0040] Specifically, the power grid disturbance device can flexibly adjust the system voltage to simulate the steady-state operation and transient fault state of the alternating current power grid. The transient fault includes but is not limited to single-phase voltage drop, two-phase voltage drop and three-phase voltage drop fault of the alternating current system, and the voltage drop amplitude and duration can be flexibly adjusted. The power grid disturbance device can simulate the equivalent impedance of the alternating current power grid. In the embodiment of the present application, as shown in the figure, the power grid disturbance device comprises a voltage regulator, a voltage source inverter, a transformer, a DC power transmission simulation system and a control system. Figure 2 ​As shown, the power grid disturbance device includes a rectifier-end power grid disturbance device and an inverter-end power grid disturbance device. The rectifier-end power grid disturbance device is configured to generate a disturbance or simulate a fault and apply the disturbance or fault to the rectifier end of the DC power transmission simulation system. The inverter-end power grid disturbance device is configured to generate a disturbance or simulate a fault and apply the disturbance or fault to the inverter end of the DC power transmission simulation system.

[0041] The active voltage regulator is configured to adjust the voltage of the winding when the power grid disturbance device generates a disturbance or simulates a fault, and transmit the adjusted voltage to the DC power transmission simulation system to meet the adjustment requirements of the DC system in various operating modes for steady-state and transient-state voltage.

[0042] The DC power transmission simulation system includes a thyristor cooling / heating system configured to control the temperature of the thyristor devices in the rectifier bridge and the inverter bridge of the DC power transmission simulation system to simulate the turn-off time of the thyristor in the actual HVDC power transmission system. Specifically, by controlling the junction temperature of the thyristor valve in the DC power transmission system, the large current commutation process of the thyristor valve in the actual DC project can be simulated in the laboratory with small current, and the turn-off time of the thyristor can be flexibly controlled with different junction temperatures, which has the advantages of high simulation accuracy, simple operation, safety and economy.

[0043] Further, the active voltage regulation dynamic simulation test device can be internally provided with a test power supply rectifier end and a test power supply inverter end to simulate the rectifier end power grid and the inverter end power grid, or can be directly connected to the external test power supply rectifier end and test power supply inverter end.

[0044] In the embodiment of the present application, the active voltage regulation dynamic simulation test device establishes an active voltage regulator in the HVDC power transmission transformer by taking advantage of the technical advantages of power electronic non-arc switching, flexible control, fast response, and unlimited number of actions. The amplitude and phase of the active voltage regulator are flexibly adjustable, and it can quickly support the commutation voltage of the converter valve when the system voltage is low, greatly improving the operation reliability of the DC system. Further, the active voltage regulation dynamic simulation test device simulates the voltage regulation effect of the active voltage regulator under steady-state operation and transient fault of the HVDC system, and verifies the ability of the active voltage regulator to regulate steady-state voltage and quickly compensate for single-phase / two-phase / three-phase voltage drop faults in transient state.

[0045] In one embodiment, as shown in Figure 2 The active voltage regulator includes a rectifier-end active voltage regulator and an inverter-end active voltage regulator. The rectifier-end active voltage regulator and the inverter-end active voltage regulator each include a main transformer and a voltage regulation converter. Specifically, the voltage regulation converter with adjustable amplitude and phase is connected in series between the neutral point of the high-voltage winding of the main transformer and the ground.

[0046] In a specific embodiment, the rectifier end active voltage regulator and / or the inverter end active voltage regulator are used to adjust the voltage of each winding of the main transformer by adjusting the output voltage of the voltage regulating converter when the power grid disturbance device generates a disturbance or simulates a fault, to adjust the steady state and transient voltage in various operating modes of the DC system, and to deliver the adjusted voltage to the DC transmission simulation system for transmission.

[0047] In the embodiment of the present application, the voltage regulating converter with flexible amplitude and phase adjustment is connected in series between the neutral point of the high voltage winding of the main transformer and the ground, avoiding the turn-to-turn short circuit in the traditional mechanical voltage regulation process.

[0048] In an embodiment, as shown in Figure 2 , the main transformer includes a high voltage winding, a low voltage winding, and a voltage regulating winding, and the voltage regulating winding provides energy for the voltage regulating converter.

[0049] In a specific embodiment, the voltage regulating converter obtains energy through the voltage regulating winding of the main transformer, and the active voltage regulator can meet various operating requirements of the DC system through steady state voltage regulation and resist commutation failure caused by AC faults through fast transient voltage regulation.

[0050] In an embodiment, as shown in Figure 3 , the voltage regulating converter includes an energy taking transformer, a converter module, and a fast bypass module, wherein the secondary side winding of the energy taking transformer, the converter module, and the fast bypass module are connected in sequence; the primary side winding of the energy taking transformer is connected with the voltage regulating winding. The connection relationship between the primary side winding of the energy taking transformer and the voltage regulating winding is not shown in Figure 3 .

[0051] In a specific embodiment, the fast bypass module includes one fast bypass submodule or multiple cascaded fast bypass submodules. The fast bypass submodule is connected in parallel with the first power electronic device in anti-parallel connection through a mechanical switch. The power devices used by the first electronic device include but are not limited to thyristor devices and IGBT devices. When the active voltage regulator needs to be repaired or fails to exit, it can be realized through the fast bypass submodule, improving the operation reliability of the device.

[0052] The converter module includes one converter submodule or multiple cascaded converter submodules. The converter submodule adopts a mature single-phase back-to-back H-bridge structure or a multi-level structure. The power devices used by each converter submodule include but are not limited to IGBT devices, silicon carbide devices, and IGCT devices. Through the converter submodule, different amplitude and phase voltage values can be quickly generated.

[0053] The energy extraction transformer adopts a multi-winding structure and is used for connecting multiple converter sub-modules. The energy extraction transformer provides energy for the voltage regulating converter, electrically isolates the voltage regulating converter from the main transformer, and simultaneously, in order to suppress the current pulsation of the voltage regulating converter, a large converter reactance is required. In order to reduce the floor area of the device, the converter reactance is integrated in the energy extraction transformer.

[0054] In an embodiment, as shown in Figure 2 The DC power transmission simulation system further comprises a rectifier bridge, an inverter bridge, a first smoothing reactor, a second smoothing reactor, a DC circuit breaker, a first filter circuit, and a second filter circuit.

[0055] The rectifier end grid disturbance device, the main transformer in the rectifier end active voltage regulator, the rectifier bridge, the first smoothing reactor, the DC circuit breaker, the second smoothing reactor, the inverter bridge, the main transformer in the inverter end active voltage regulator, and the inverter end grid disturbance device are sequentially connected in order. The first filter circuit is connected in parallel between the first smoothing reactor and the DC circuit breaker and is connected into the DC power transmission simulation system. The second filter circuit is connected in parallel between the second smoothing reactor and the DC circuit breaker and is connected into the DC power transmission simulation system.

[0056] In a specific embodiment, the rectifier bridge is used for converting a three-phase alternating voltage into a direct current voltage. The rectifier bridge is composed of an absorption circuit and second power electronic devices in parallel, and the power devices used by the second power electronic devices include but are not limited to thyristor devices and IGBT devices. The rectifier bridge adopts a six-pulse bridge or a twelve-pulse bridge, each six-pulse bridge is composed of six thyristor elements, and each thyristor is configured with an absorption circuit and a triggering unit to convert a three-phase alternating voltage into a direct current voltage. The rectifier bridge topology is as shown in Figure 4 .

[0057] The inverter bridge is used for converting a direct current voltage into a three-phase alternating voltage. The inverter bridge is composed of an absorption circuit and second power electronic devices in parallel, and the power devices used by the second power electronic devices include but are not limited to thyristor devices and IGBT devices. The inverter bridge adopts a six-pulse bridge or a twelve-pulse bridge, each six-pulse bridge is composed of six thyristor elements, and each thyristor is configured with an absorption circuit and a triggering unit to convert a direct current voltage into a three-phase alternating voltage. The inverter bridge topology is as shown in Figure 5 .

[0058] In an embodiment, as shown in Figure 2As shown, the active voltage regulation dynamic model test device further comprises a control protection system connected with the rectifier end power grid disturbance device, the inverter end power grid disturbance device, the rectifier end active voltage regulator, the inverter end active voltage regulator, the rectifier bridge and the inverter bridge respectively, and used for collecting operating parameters of the active voltage regulation dynamic model test device, and controlling the rectifier end power grid disturbance device, the inverter end power grid disturbance device, the rectifier end active voltage regulator, the inverter end active voltage regulator, the rectifier bridge and the inverter bridge according to the operating parameters, while overvoltage and overcurrent protection of each loop is performed.

[0059] The active voltage regulation dynamic model test device provided in the embodiment considers a DC system parameter low-voltage equivalent conversion of impedance parameters, a commutation process simulation method combining custom design of thyristors and junction temperature control, carries out commutation failure simulation and recurrence research under single-phase / two-phase / three-phase voltage drop faults of a power grid, builds a DC equivalent low-voltage physical model and an active voltage regulator physical prototype, builds an active voltage regulation dynamic model test platform in a laboratory, truly simulates the ability of an active voltage regulator applied to a high-voltage DC transformer to resist commutation failure and quickly compensate and resist voltage drop in a transient state when the steady-state voltage regulation function is applied, improves flexibility and controllability of power grid operation, improves the overall level of power electronic technology, and supports development of new electric power technology and equipment in the future.

[0060] The embodiment of the present application also provides an active voltage regulation dynamic model test method based on the active voltage regulation dynamic model test device. Figure 6 As shown, the active voltage regulation dynamic model test method comprises the following steps:

[0061] Step S1: A disturbance or a simulated fault is generated by the power grid disturbance device, and the disturbance or the fault is applied to the DC power transmission simulation system.

[0062] Step S2: When the power grid disturbance device generates a disturbance or a simulated fault, the winding voltage of the active voltage regulator is adjusted, and the adjusted voltage is transmitted to the DC power transmission simulation system for transmission.

[0063] Step S3: The thyristor devices in the rectifier bridge and the inverter bridge in the DC power transmission simulation system are temperature-controlled by using the thyristor cooling / heating system to simulate the turn-off time of the thyristor in the actual high-voltage DC power transmission system.

[0064] The technical scheme description of the active voltage regulation dynamic model test method provided in the embodiment of the present application is described in detail in the above-mentioned active voltage regulation dynamic model test device description, and will not be repeated here.

[0065] The present invention provides an active voltage regulator dynamic model test method, which uses a power grid disturbance device to generate disturbances to simulate the rise and fall of power grid voltage, various power grid faults and AC system impedance. By simulating the voltage regulation function of the active voltage regulator under steady-state operation and transient faults of the high-voltage DC system, the method verifies the ability of the active voltage regulator to regulate voltage in steady state and to quickly compensate for transient single-phase / two-phase / three-phase voltage drop faults.

[0066] This invention provides a computer device, such as... Figure 7 As shown, the device may include a processor 81 and a memory 82, wherein the processor 81 and the memory 82 may be connected via a bus or other means. Figure 7 Take a bus connection as an example.

[0067] Processor 81 can be a central processing unit (CPU). Processor 81 can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above types of chips.

[0068] The memory 82, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the corresponding program instructions / modules in the embodiments of the present invention. The processor 81 executes various functional applications and data processing by running the non-transitory software programs, instructions, and modules stored in the memory 82, thereby realizing the active voltage regulation dynamic model test method in the above method embodiments.

[0069] The memory 82 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created by the processor 81, etc. Furthermore, the memory 82 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 82 may optionally include memory remotely located relative to the processor 81, and these remote memories may be connected to the processor 81 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, mobile communication networks, and combinations thereof.

[0070] One or more modules are stored in the memory 82, when executed by the processor 81, perform the steps of the methods as described above. Figure 1 The active voltage regulation dynamic test method in the embodiment shown.

[0071] The above computer device specific details can be understood by referring to the corresponding description and effects of the embodiment shown, which will not be repeated here. Figures 1-6 The above computer device specific details can be understood by referring to the corresponding description and effects of the embodiment shown, which will not be repeated here.

[0072] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiment methods. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc. The storage medium can also include a combination of the above-mentioned types of memories.

[0073] Obviously, the above-mentioned embodiments are only examples for clear illustration, and are not limitations on the embodiments. Based on the above-mentioned description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An active voltage regulating dynamic model testing device, characterized in that, include: Active voltage regulator, grid disturbance device and DC transmission simulation system, among which, The active voltage regulator includes a main transformer and a voltage regulating converter. The main transformer includes a high-voltage winding, a low-voltage winding, and a voltage regulating winding. The voltage regulating winding provides energy to the voltage regulating converter. The voltage regulating converter, whose amplitude and phase are adjustable, is connected in series between the neutral point of the high-voltage winding of the main transformer and ground. The active voltage regulator is used to adjust the voltage of the high-voltage winding and the low-voltage winding of the main transformer by adjusting the output voltage of the voltage regulating converter when the grid disturbance device generates a disturbance or simulates a fault, and then transmits the adjusted voltage to the DC transmission simulation system for transmission. The power grid disturbance device is used to generate disturbances or simulate faults and apply the disturbances or faults to the DC transmission simulation system; The DC transmission simulation system includes a thyristor cooling / heating system, which is used to control the temperature of the thyristor devices in the rectifier bridge and inverter bridge of the DC transmission simulation system in order to simulate the turn-off time of the thyristors in an actual high voltage DC transmission system.

2. The active voltage regulating dynamic model test device according to claim 1, characterized in that, The active voltage regulator includes an active voltage regulator at the rectifier end and an active voltage regulator at the inverter end.

3. The active voltage regulating dynamic model test device according to claim 2, characterized in that, The power grid disturbance device includes a rectifier-side power grid disturbance device and an inverter-side power grid disturbance device, wherein... The rectifier-end grid disturbance device is used to generate disturbances or simulate faults and apply the disturbances or faults to the rectifier end of the DC transmission simulation system. The inverter-end grid disturbance device is used to generate disturbances or simulate faults and apply the disturbances or faults to the inverter end of the DC transmission simulation system.

4. The active voltage regulating dynamic model test device according to claim 1, characterized in that, The voltage regulating converter includes: an energy extraction transformer, a converter module, and a fast bypass module, wherein... The secondary winding of the energy harvesting transformer, the converter module, and the fast bypass module are connected in sequence. The primary winding of the energy harvesting transformer is connected to the voltage regulating winding.

5. The active voltage regulating dynamic model test device according to claim 4, characterized in that, The converter module includes one converter submodule or multiple cascaded converter submodules; The converter submodule adopts an H-bridge or multi-level structure; The power devices used in the converter submodule include IGBT devices, silicon carbide devices, and IGCT devices.

6. The active voltage regulating dynamic model test device according to claim 5, characterized in that, The energy harvesting transformer adopts a multi-winding structure and is used to connect to multiple converter submodules.

7. The active voltage regulating dynamic model test device according to claim 5, characterized in that, The fast bypass module includes one fast bypass submodule or multiple cascaded fast bypass submodules; The fast bypass submodule includes a mechanical switch and an anti-parallel first power electronic device; The power devices used in the first power electronic device include thyristor devices and IGBT devices.

8. The active voltage regulating dynamic model test device according to claim 7, characterized in that, The converter submodule and the fast bypass submodule are connected in a one-to-one correspondence; The other end of the fast bypass submodule is connected in series between the neutral point of the high-voltage winding of the main transformer and ground.

9. The active voltage regulating dynamic model test device according to claim 3, characterized in that, The DC transmission simulation system further includes: a rectifier bridge, an inverter bridge, a first smoothing reactor, a second smoothing reactor, a DC circuit breaker, a first filter circuit, and a second filter circuit, wherein... The grid disturbance device at the rectifier end, the main transformer in the active voltage regulator at the rectifier end, the rectifier bridge, the first smoothing reactor, the DC circuit breaker, the second smoothing reactor, the inverter bridge, the main transformer in the active voltage regulator at the inverter end, and the grid disturbance device at the inverter end are connected in sequence. The other end of the rectifier-end grid disturbance device is connected to the rectifier end of the test power supply via an AC circuit breaker. The other end of the inverter-end grid disturbance device is connected to the test power inverter end through an AC circuit breaker. The first filter circuit is located between the first smoothing reactor and the DC circuit breaker, and is connected in parallel to the DC transmission simulation system; The second filter circuit is located between the second smoothing reactor and the DC circuit breaker, and is connected in parallel to the DC transmission simulation system.

10. The active voltage regulating dynamic model test device according to claim 9, characterized in that, Both the rectifier bridge and the inverter bridge include an absorption circuit and a second power electronic device. The absorption circuit is connected in parallel with the second power electronic device; The power devices used in the second power electronic device include thyristor devices and IGBT devices.

11. The active voltage regulating dynamic model test device according to claim 9, characterized in that, Also includes: The control and protection system is connected to the rectifier-side grid disturbance device, the inverter-side grid disturbance device, the rectifier-side active voltage regulator, the inverter-side active voltage regulator, the rectifier bridge, and the inverter bridge. The control and protection system is used to collect the operating parameters of the active voltage regulator dynamic model test device, and control the rectifier-side grid disturbance device, the inverter-side grid disturbance device, the rectifier-side active voltage regulator, the inverter-side active voltage regulator, the rectifier bridge, and the inverter bridge according to the operating parameters, while performing overvoltage and overcurrent protection for each circuit.

12. A method for testing an active voltage regulating dynamic model, characterized in that, Based on the active voltage regulating dynamic model test apparatus according to any one of claims 1-11, the active voltage regulating dynamic model test method includes: The power grid disturbance device generates disturbances or simulates faults, and applies the disturbances or faults to the DC transmission simulation system. When the grid disturbance device generates a disturbance or simulates a fault, the output voltage of the voltage regulating converter in the active voltage regulator is adjusted to realize the winding voltage adjustment of the high voltage winding and low voltage winding of the main transformer, and the adjusted voltage is transmitted to the DC transmission simulation system for transmission. The thyristor cooling / heating system is used to control the temperature of the thyristor devices in the rectifier bridge and inverter bridge of the DC transmission simulation system in order to simulate the turn-off time of the thyristors in the actual high voltage DC transmission system.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the active voltage regulation dynamic model test method as described in claim 12.

14. A computer device, characterized in that, include: The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes these computer instructions to perform the active voltage regulation dynamic model test method as described in claim 12.

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