Real-time simulation test modeling method and system for new energy station

Abstract

The invention relates to the technical field of power system simulation, and discloses a real-time simulation test modeling method and system for a new energy station, and the method comprises the steps: building a simulation modeling platform for the interactive connection between a virtual model of the new energy station and physical equipment, and carrying out a low-voltage ride-through simulation test, thereby achieving the real-time simulation test of the new energy station. And controller parameters of the power generation units are adjusted according to the simulation test structure, so that control parameters of entity controllers of a plurality of virtual control power generation units in the new energy station under the actual working condition are obtained, and stable operation of the new energy station in the low-voltage ride-through fault is ensured. The technical problem of how to determine the controller parameters of the entity controller of the power generation unit of the new energy station so as to improve the operation stability of the new energy station is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system simulation, and in particular to a real-time simulation test modeling method and system for a new energy station. Background Art

[0002] As the entire power industry is working hard to build a new power system, the number and capacity of new energy stations connected to the power grid are increasing. New energy stations connected to the power grid usually refer to new energy stations that send power to 220kV or 500kV voltage level power grids. The installed capacity of this type of new energy power generation station is generally above 50MW, and the maximum may be several thousand megawatts, which directly participates in the safe and stable operation of the main power grid.

[0003] Therefore, before the new energy stations with centralized access to the power grid are connected to the grid for power generation, it is urgent to model the electromagnetic transient model at the station level. The purpose is to add the electromagnetic transient model of the newly built new energy station to the electromagnetic transient model of the AC / DC large power grid for simulation test operation. According to the specific power grid operation mode and line maintenance operation mode, the safe and stable operation risks of the new energy station are pre-mastered, and emergency plans are formulated to ensure the safe, stable and reliable operation of the new energy power station under various operation modes such as conventional operation mode and power grid line maintenance operation mode, so as to ensure the safety of the large power grid.

[0004] At present, the controller parameters of new energy stations are usually simulated and optimized through simplified models, which ignore the mutual influence between power generation units. During low voltage ride-through faults, the sudden drop in grid voltage may cause new energy equipment to be disconnected from the grid, which in turn triggers a chain reaction and affects the stability of the entire power system. However, the existing simulation methods cannot provide reasonable controller parameters, resulting in the inability of new energy stations to effectively cope with voltage drops in actual low voltage ride-through faults, affecting their operating performance and the safety of the grid. Therefore, it is urgent to develop more accurate simulation models to ensure the stable operation of new energy stations during low voltage ride-through faults. Summary of the invention

[0005] The present invention provides a real-time simulation test modeling method and system for a new energy station, which solves the technical problem of how to determine the controller parameters of the physical controller of the power generation unit of the new energy station to improve the operation stability of the new energy station.

[0006] A first aspect of the present invention provides a real-time simulation test modeling method for a new energy station, comprising:

[0007] Responding to a simulation modeling request for a new energy station, and building a simulation modeling platform for the new energy station;

[0008] Performing low voltage ride-through simulation on the simulation modeling platform to obtain power generation unit test data of the new energy station, wherein the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data;

[0009] respectively comparing the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit;

[0010] Determine target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison results;

[0011] The target simulation controller parameters are used as control parameters of the physical controller of the associated virtual-controlled power generation unit.

[0012] Optionally, the new energy station includes a power grid access, a monitoring device, a communication interface device, a plurality of power generation units and a plurality of entity controllers connected to the power generation units, and the response to the simulation modeling request for the new energy station is to build a simulation modeling platform for the new energy station;

[0013] In response to a simulation modeling request for a new energy station, one power generation unit is randomly selected from the plurality of power generation units as a real-control power generation unit, and the remaining power generation units are selected as virtual-control power generation units;

[0014] Using a physical controller connected to the actual control power generation unit as a target controller;

[0015] An equivalent power grid model of the access power grid, a real control main loop model of the real control power generation unit, and a virtual control main loop model and a simulation controller model of multiple virtual control power generation units are constructed by a real-time simulator, wherein the virtual control main loop model is connected to the simulation controller model in a one-to-one correspondence;

[0016] The monitoring device, the communication interface device, the target controller and the real-time simulator are coupled and connected to build a simulation modeling platform for the new energy station.

[0017] Optionally, coupling and connecting the monitoring device, the communication interface device, the target controller and the real-time simulator to build a simulation modeling platform for the new energy station includes:

[0018] Connecting the real control main loop model and a plurality of the virtual control main loop models with the equivalent power grid model;

[0019] Connecting the target controller to the actual control main loop model via the communication interface device;

[0020] connecting the monitoring device to the target controller;

[0021] The plurality of simulation controller models are respectively connected to the monitoring device via the communication interface device to build a simulation modeling platform for the new energy station.

[0022] Optionally, the power generation unit test data includes a grid connection point voltage effective value waveform, a power generation unit active power waveform and a power generation unit reactive power waveform.

[0023] Optionally, determining target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison result includes:

[0024] When the test data of the virtual-controlled power generation unit is consistent with the test data of the actual-controlled power generation unit, the controller parameters associated with the actual-controlled power generation unit are used as the target simulation controller parameters of the virtual-controlled power generation unit;

[0025] When the test data of the virtual-controlled power generation unit is inconsistent with the test data of the actual-controlled power generation unit, the initial simulation controller parameters of the virtual-controlled power generation unit are adjusted until the preset adjustment conditions are met, and the target simulation controller parameters are output.

[0026] Optionally, the initial simulation controller parameters include reactive support coefficient, reactive current recovery rate, active current recovery rate and current inner loop coefficient, the target simulation controller parameters include first-stage target simulation controller parameters and second-stage target simulation controller parameters, and the initial simulation controller parameters of the virtual-controlled power generation unit are adjusted until preset adjustment conditions are met, and the target simulation controller parameters are output, including:

[0027] Adjust the reactive power support coefficient of the virtual-controlled power generation unit until the reactive power of the virtual-controlled power generation unit and the real-controlled power generation unit in the preset first stage of low voltage ride-through simulation are consistent, and use the reactive power support coefficient at the current moment as the first stage target simulation controller parameter;

[0028] Determine a first current reference value according to the reactive support coefficient at the current moment;

[0029] Based on the first current reference value, the first-stage virtual-control dq-axis voltage is adjusted by adjusting the current inner loop coefficient of the virtual-control power generation unit, and when the first-stage dq-axis voltage is consistent with the first-stage actual-control dq-axis voltage of the actual-control power generation unit, the current inner loop coefficient at the current moment is used as the first-stage target simulation controller parameter;

[0030] Adjust the reactive current recovery rate and the active current recovery rate of the virtual-controlled power generation unit until the reactive power recovery rate of the virtual-controlled power generation unit is consistent with that of the actual-controlled power generation unit in the preset second stage under the low voltage ride-through simulation, and the active power recovery rate of the virtual-controlled power generation unit is consistent with that of the actual-controlled power generation unit, and then use the reactive current recovery rate and the active current recovery rate at the current moment as the target simulation controller parameters of the second stage;

[0031] Determining a second current reference value according to the reactive current recovery rate and the active current recovery rate at the current moment;

[0032] Based on the second current reference value, the second-stage virtual-control dq-axis voltage is adjusted by adjusting the current inner-loop coefficient of the virtual-control power generation unit. When the second-stage dq-axis voltage is consistent with the second-stage actual-control dq-axis voltage of the actual-control power generation unit, the current inner-loop coefficient at the current moment is used as the second-stage target simulation controller parameter.

[0033] A second aspect of the present invention provides a real-time simulation test modeling system for a new energy station, comprising:

[0034] A response module, used to respond to a simulation modeling request for a new energy station and build a simulation modeling platform for the new energy station;

[0035] A simulation module, used to perform low voltage ride-through simulation on the simulation modeling platform to obtain power generation unit test data of the new energy station, wherein the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data;

[0036] A comparison module, used to compare the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit;

[0037] A data processing module, used to determine target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison results;

[0038] The data output module is used to use the target simulation controller parameters as control parameters of the physical controller of the associated virtual-controlled power generation unit.

[0039] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the real-time simulation test modeling method for a new energy station as described in any one of the above items.

[0040] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the real-time simulation test modeling method for a new energy station as described in any one of the above items.

[0041] A fifth aspect of the present invention provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the real-time simulation test modeling method for a new energy station as described in any one of the above items.

[0042] It can be seen from the above technical solutions that the present invention has the following advantages:

[0043] In the present invention, in response to a simulation modeling request for a new energy station, a simulation modeling platform for the new energy station is built; a low voltage ride-through simulation is performed on the simulation modeling platform to obtain test data of the power generation unit of the new energy station, the power generation unit test data including test data of the actual control power generation unit and test data of multiple virtual control power generation units; the test data of each virtual control power generation unit is compared with the test data of the actual control power generation unit; target simulation controller parameters of multiple virtual control power generation units in the new energy station are determined according to the comparison results; and the target simulation controller parameters are used as control parameters of the physical controller of the associated virtual control power generation unit.

[0044] The present invention builds a simulation modeling platform that interactively connects the virtual model of the new energy station with the physical equipment, and conducts a low voltage ride-through simulation test. The controller parameters of the power generation unit are adjusted according to the simulation test structure, so as to obtain the control parameters of the physical controllers of multiple virtual-controlled power generation units in the new energy station under actual working conditions, so as to ensure the stable operation of the new energy station during a low voltage ride-through fault, and solves the technical problem of how to determine the controller parameters of the physical controller of the power generation unit of the new energy station to improve the operating stability of the new energy station. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0046] Figure 1 A flowchart of the steps of a real-time simulation test modeling method for a new energy station provided in the first embodiment of the present invention;

[0047] Figure 2A flowchart of the steps of a real-time simulation test modeling method for a new energy station provided in the second embodiment of the present invention;

[0048] Figure 3 It is a structural diagram of the simulation modeling platform;

[0049] Figure 4 It is a schematic diagram of the connection between the primary system simulation model and the equivalent power grid model;

[0050] Figure 5 It is a schematic diagram of the connection between two power generation unit models and the equivalent power grid model;

[0051] Figure 6 A flow chart of the modeling test for the real-time simulation test of the new energy station;

[0052] Figure 7 This is a schematic diagram of data waveforms of a typical low voltage ride-through process;

[0053] Figure 8 It is a schematic diagram of the simulation controller model under low voltage ride-through simulation;

[0054] Fig. 9 A structural block diagram of a real-time simulation test modeling system for a new energy station provided in Embodiment 3 of the present invention;

[0055] Fig.10 This is a structural block diagram of a computer device provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0056] The embodiments of the present invention provide a real-time simulation test modeling method and system for a new energy station, which are used to solve the technical problem of how to determine the controller parameters of the physical controller of the power generation unit of the new energy station to improve the operating stability of the new energy station.

[0057] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The power generation units of centralized new energy stations mainly include wind turbines, photovoltaic units, SVG units, and STATCOM units. These power generation units and reactive compensation units have small single-unit capacity, huge number, and are all connected to the grid by power electronic converters, which is very different from traditional synchronous generators. These changes have put forward higher requirements on power system simulation technology, which is mainly manifested in two aspects: first, larger-scale parallel simulation computing resources are needed to complete electromagnetic transient simulation, and second, smaller simulation step size is required to achieve accurate simulation of power electronic switching devices, so that it is possible to carry out system stability analysis on large-scale new energy power systems.

[0059] The existing electromagnetic transient modeling schemes for new energy stations have the following main features:

[0060] (1) In the early stage of planning and construction of new energy stations, important equipment such as generator sets have not yet been completed through bidding and procurement, nor have they been put into operation. Therefore, it is only possible to use the existing typical new energy station model as a basis, make simple modifications to parameters such as capacity and grid-connected voltage, and form a model of the current new station. The model is relatively rough and does not have the new technical characteristics of the new energy units of the current station under construction.

[0061] (2) During the operation period after the completion of the construction of the new energy station, field tests are carried out to fit the electromagnetic transient model. However, field tests require the coordination of many dispatching units, operating units and on-site implementation units. The test window period is also very tight, and it may not be possible to traverse all the expected tests, which depends on the investment of a large amount of manpower and material resources. As a result, it is difficult to establish an accurate electromagnetic transient model through field tests even after the new station is put into operation.

[0062] But there will be the following problems:

[0063] (1) The electromagnetic transient model is based on typical model parameters and does not have new technical features. It cannot reflect the electromagnetic transient characteristics of specific new energy sites.

[0064] (2) On-site test conditions are limited, and a lot of manpower and material resources are required to obtain test data.

[0065] See also Figure 1 , Figure 1 A flowchart of the steps of a real-time simulation test modeling method for a new energy station provided in Example 1 of the present invention.

[0066] The present invention provides a real-time simulation test modeling method for a new energy station, comprising:

[0067] Step 101: respond to a simulation modeling request for a new energy station and build a simulation modeling platform for the new energy station.

[0068] Simulation modeling request refers to the request instruction information issued for conducting electromagnetic transient modeling of new energy stations.

[0069] The simulation modeling platform refers to a platform built based on the interactive connection between electromagnetic transient modeling and physical equipment, which is used to carry out low voltage ride-through simulation.

[0070] It should be noted that the electromagnetic transient model can provide a basis for low voltage ride through simulation. When constructing a low voltage ride through simulation model, factors such as circuit component characteristics and electromagnetic coupling relationships considered in electromagnetic transient modeling can be directly applied to low voltage ride through simulation.

[0071] In an embodiment of the present invention, in response to the request instruction information received for carrying out electromagnetic transient modeling for a new energy station, a simulation modeling platform corresponding to the new energy station is built based on the interactive connection between electromagnetic transient modeling and physical equipment to carry out low voltage ride-through simulation.

[0072] Step 102: Perform low voltage ride-through simulation on the simulation modeling platform to obtain power generation unit test data of the new energy station, where the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data.

[0073] In an embodiment of the present invention, model parameters of each electromagnetic transient model are set, a simulation modeling platform is run, a low voltage ride-through simulation test is carried out, and actual control power generation unit test data of a selected actual control power generation unit and virtual control power generation unit test data of multiple virtual control power generation units are recorded.

[0074] Step 103 : Compare the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit.

[0075] In the embodiment of the present invention, the test data of each virtual-controlled power generation unit is compared with the test data of the actual-controlled power generation unit, that is, the consistency comparison is performed between the test data of one virtual-controlled power generation unit and the test data of one actual-controlled power generation unit.

[0076] Step 104: Determine target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison results.

[0077] In an embodiment of the present invention, when the test data of the virtual-controlled power generation unit is consistent with the test data of the actual-controlled power generation unit, the controller parameters associated with the actual-controlled power generation unit are used as the target simulation controller parameters of the virtual-controlled power generation unit; when the test data of the virtual-controlled power generation unit is inconsistent with the test data of the actual-controlled power generation unit, the initial simulation controller parameters of the virtual-controlled power generation unit are adjusted until the preset adjustment conditions are met, and the target simulation controller parameters are output.

[0078] Step 105: Use the target simulation controller parameters as control parameters of the physical controller of the associated virtual-controlled power generation unit.

[0079] In the embodiment of the present invention, the control parameters of the physical controller connected to the virtual control power generation unit in the new energy station are adjusted to the target simulation controller parameters.

[0080] In the present invention, in response to a simulation modeling request for a new energy station, a simulation modeling platform for the new energy station is built; a low voltage ride-through simulation is performed on the simulation modeling platform to obtain test data of the power generation unit of the new energy station, the power generation unit test data including test data of the actual control power generation unit and test data of multiple virtual control power generation units; the test data of each virtual control power generation unit is compared with the test data of the actual control power generation unit; target simulation controller parameters of multiple virtual control power generation units in the new energy station are determined according to the comparison results; and the target simulation controller parameters are used as control parameters of the physical controller of the associated virtual control power generation unit.

[0081] The present invention builds a simulation modeling platform that interactively connects the virtual model of the new energy station with the physical equipment, and conducts a low voltage ride-through simulation test. The controller parameters of the power generation unit are adjusted according to the simulation test structure, so as to obtain the control parameters of the physical controllers of multiple virtual-controlled power generation units in the new energy station under actual working conditions, so as to ensure the stable operation of the new energy station during a low voltage ride-through fault, and solves the technical problem of how to determine the controller parameters of the physical controller of the power generation unit of the new energy station to improve the operating stability of the new energy station.

[0082] See also Figure 2 , Figure 2 A flowchart of the steps of a real-time simulation test modeling method for a new energy station provided in Embodiment 2 of the present invention.

[0083] The present invention proposes a real-time simulation test modeling method for a new energy equivalent power grid model based on a new energy station. By establishing a simulation modeling test platform in the laboratory, the electromagnetic transient modeling of any new energy unit is realized, the latest technical features of the electromagnetic transient model of the new energy station are ensured, and the simulation model reflects the electromagnetic transient characteristics of the specific new energy station on site. The test data is obtained in a semi-physical simulation manner, and a detailed electromagnetic transient digital model is established, which is applied to the electromagnetic transient simulation analysis of large power grids.

[0084] According to the constructed simulation modeling platform and test method, a digital model of the renewable energy power generation unit controller that is consistent with the on-site one can be established in the real-time simulator, and completely consistent test conditions can be set up and tested. By conducting low voltage ride-through simulation and controller parameter adjustment tests on the simulation modeling platform, the control characteristics of the renewable energy hardware control device (actual control power generation unit) and the control characteristics of the renewable energy digital control model (virtual control power generation unit) are guaranteed to respond consistently in the simulation model, providing a simple real-time simulation test method for accurate modeling and comparative testing of renewable energy digital control models.

[0085] The advantages of the present invention are as follows: it is only necessary to establish an electrical main circuit model of one power generation unit and an external corresponding controller hardware device (actual control power generation unit); through simulation modeling and controller parameter adjustment test, an accurate digital simulation model of the controller of the virtual control power generation unit can be established; and the consistency of the electromagnetic transient characteristics of the hardware controller (actual control power generation unit) and the controller digital model (virtual control power generation unit) can be tested under the same simulation environment and test conditions, providing a simple laboratory implementation method for accurate modeling and test comparison of new energy power generation units, which is not restricted by on-site test conditions and can implement simulation tests under any working conditions according to test needs.

[0086] The simulation modeling platform includes an electromagnetic transient model of a new energy station constructed by the RTDS real-time simulator, a monitoring device, a communication interface device, and a physical controller connected to the actual control power generation unit.

[0087] The electromagnetic transient model of the new energy station includes the equivalent grid model of the access grid, the real control main loop model of the real control power generation unit, and the virtual control main loop model and simulation controller model of multiple virtual control power generation units; the electromagnetic transient model of the new energy station is used to accurately simulate the electromagnetic relationship inside the generator, the switching action of the converter, etc., so as to accurately reflect its operating characteristics in the access grid corresponding to the new energy equivalent grid model.

[0088] Then, the electromagnetic transient model of the virtual new energy station constructed in the RTDS real-time simulator is connected with the physical hardware devices in the new energy station to form a simulation modeling platform for the new energy station.

[0089] The present invention provides a real-time simulation test modeling method for a new energy station, comprising:

[0090] Step 201: respond to a simulation modeling request for a new energy station and build a simulation modeling platform for the new energy station.

[0091] Furthermore, the new energy station includes a power grid access, a monitoring device, a communication interface device, a plurality of power generation units, and a plurality of entity controllers connected to the power generation units. Step 201 may include the following sub-steps:

[0092] S11. In response to a simulation modeling request for a new energy station, one power generation unit is randomly selected from a plurality of power generation units as a real-control power generation unit, and the remaining power generation units are used as virtual-control power generation units.

[0093] S12. The physical controller connected to the actual controlled power generation unit is used as the target controller.

[0094] S13. Construct an equivalent power grid model connected to the power grid, a real-control main loop model of a real-control power generation unit, and a virtual-control main loop model and a simulation controller model of multiple virtual-control power generation units through a real-time simulator. The virtual-control main loop model and the simulation controller model are connected one-to-one.

[0095] S14. Couple the monitoring device, the communication interface device, the target controller and the real-time simulator to build a simulation modeling platform for the new energy station.

[0096] Further, S14 may include the following sub-steps:

[0097] S141. Connecting the actual control main loop model and multiple virtual control main loop models to an equivalent power grid model.

[0098] S142, connecting the target controller to the actual control main loop model via a communication interface device.

[0099] S143, connecting the monitoring device to the target controller.

[0100] S144. Connect multiple simulation controller models to the monitoring device through the communication interface device to build a simulation modeling platform for the new energy station.

[0101] For ease of understanding, the following example takes a new energy station (project 1# power station) containing one real-controlled power generation unit (1# power generation unit) and one virtual-controlled power generation unit (2# power generation unit) as an example. Figure 3 , Figure 3 This is a schematic diagram of the simulation modeling platform:

[0102] 1. Real-time simulation device (RTDS real-time simulator): The real-time simulation device runs the equivalent grid model connected to the power grid. The equivalent grid model is connected to the "Electrical main circuit model of the 1# power generation unit of the project 1# power plant", "Electrical main circuit model of the 2# power generation unit of the project 1# power plant" and "The digital model of the controller of the 2# power generation unit of the project 1# power plant (simulation controller model)".

[0103] It should be noted that, for the unit model running in the RTDS real-time simulator, the 1# unit only establishes the 1# power generation unit electrical main circuit model, and there is no need to establish the controller digital model. The 1# power generation unit controller is connected to the RTDS real-time simulator by the actual hardware control device (target controller) through the communication interface device to realize the control function of the 1# power generation unit. The 2# power generation unit establishes the 2# power generation unit electrical main circuit model and the 2# power generation unit controller digital model.

[0104] At the same time, the 1# power generation unit and the 2# power generation unit are connected to the external monitoring device through the communication interface device to complete the monitoring and comparison of the operating status of the two power generation units of the power station.

[0105] For the convenience of explanation, Figure 3 Only two power generation units are taken as examples, without loss of generality, this solution can be applied to the power plant model of multiple power generation units. The third and fourth power generation units can be modeled in the same way as the second power generation unit, and communicate with the monitoring system through the communication interface device to complete the model construction of the entire new energy power station.

[0106] 2. Communication interface device: realize the communication function between the real-time simulation device and the first power generation unit controller device and the monitoring system device. Specific examples: RTDS dedicated communication devices GTDO, GTDI, GTAO, GTAI, GTNET, GOOSE-SV.

[0107] 3. 1# power generation unit controller device: the model is consistent with the 1# power generation unit controller device running on the project site.

[0108] 4. Monitoring system: realize the collection and comparison of electrical quantities of 1# power generation unit and 2# power generation unit.

[0109] 5. Connection relationship:

[0110] Connection line 1: 1# power generation unit grid-side voltage, grid-side current, machine-end voltage, machine-end current, unit circuit breaker switch position and other signals;

[0111] Connection line 2: 1# power generation unit converter trigger pulse and other control signals;

[0112] Connection line 3: Grid-side voltage, grid-side current, machine-end voltage, machine-end current, unit circuit breaker switch position and other signals of 1# generating unit and 2# generating unit;

[0113] Connection line 4: start, stop and other control signals of 1# generating unit and 2# generating unit;

[0114] Connection line 5: 1# power generation unit start and stop command signal;

[0115] Connection line 6: 1# power generation unit monitoring signal.

[0116] It should be noted that the primary system simulation model (electrical main circuit model of power generation unit) and the secondary system simulation model built in the RTDS real-time simulator, the primary system simulation model includes the new energy model and the converter model;

[0117] See also Figure 4 , Figure 4 It is a schematic diagram of the connection between the primary system simulation model and the equivalent power grid model;

[0118] New energy models are divided into photovoltaic array model, permanent magnet motor model and doubly fed motor model according to different power generation principles.

[0119] The converter model has different converter structures according to the corresponding new energy type.

[0120] The converter corresponding to the photovoltaic array model is a DC-DC converter + DC / AC grid-connected inverter model.

[0121] The converter corresponding to the permanent magnet motor model is an AC / DC converter + DC / AC converter model.

[0122] The converter corresponding to the doubly-fed machine model is a rotor winding AC / DC converter + DC / AC converter model.

[0123] It should be noted that it is necessary to ensure Figure 3 The structures and parameters of the primary system simulation models of the 1# power generation unit and the 2# power generation unit are completely consistent.

[0124] Therefore, this step only requires the establishment of a set of new energy + converter models, named 1# power generation unit and 2# power generation unit, and the two power generation units are connected in parallel to the same grid connection point. Figure 5 As shown, Figure 5 It is a schematic diagram of the connection between two power generation unit models and the equivalent power grid model.

[0125] Among them, the equivalent grid model is a voltage source model with internal impedance, which simulates the connection of new energy power generation units to grid systems with different short-circuit ratios by setting different internal impedance values.

[0126] It should be noted that the secondary system simulation model is a digital model of the power generation unit controller. In the RTDS real-time simulator, only the virtual control power generation unit (2# power generation unit) needs to establish a secondary system simulation model.

[0127] See 6, Figure 6 Schematic diagram of the process of modeling the real-time simulation test of the new energy station.

[0128] Step 1: Build a simulation modeling platform for new energy stations.

[0129] Step 2: Establish simulation models including primary simulation model and secondary system simulation model. The primary system simulation model includes new energy model and converter model.

[0130] Step 3: Run the simulation modeling platform and start the 1# power generation unit controller and monitoring system device.

[0131] Step 4: Conduct simulation test, apply the same input to 1# and 2# generating units, and measure the controller output of 1# and 2# generating units. If the response of 2# generating unit controller (digital model) is consistent with that of 1# generating unit controller (hardware control device), proceed to step 6, end the test, and output the associated controller parameters of 1# generating unit as the target simulation controller parameters of 2# generating unit. If the response of 2# generating unit controller (digital model) is inconsistent with that of 1# generating unit controller (hardware control device), proceed to step 5.

[0132] Step 5: Adjust the structure or parameters of the 2# power generation unit controller (digital model) until the response of the 2# power generation unit controller (digital model) is consistent with that of the 1# power generation unit controller (hardware control device).

[0133] Step 6: End the test and output the target simulation controller parameters of the 2# power generation unit.

[0134] In the embodiment of the present invention, the specific implementation process of step 201 is similar to step 101 and will not be repeated here.

[0135] Step 202: Perform low voltage ride-through simulation on the simulation modeling platform to obtain power generation unit test data of the new energy station, where the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data.

[0136] Furthermore, the power generation unit test data includes the grid connection point voltage effective value waveform, the power generation unit active power waveform and the power generation unit reactive power waveform.

[0137] First, a standardized method for dividing voltage, active power, and reactive power during the transient process of low-voltage fault ride-through of new energy units is established. Figure 7 As shown, Figure 7 This is a data waveform diagram of a typical low voltage ride-through process.

[0138] Figure 7 In the figure, U is the effective value of the voltage at the grid connection point of the new energy unit, P is the active power generated by the new energy unit, and Q is the reactive power generated by the new energy unit.

[0139] According to the time when the event occurs, the time of low voltage ride-through of the new energy unit is divided into five time points, namely t1 to t5.

[0140] t1 is the starting time of the grid connection point fault. At this time, the grid connection point voltage drops rapidly, the active power decreases, and the reactive power increases.

[0141] t2 is the time when the grid connection point fault ends. At this time, the grid connection point voltage begins to recover, the active power begins to recover, and the reactive power increases with the increase of voltage.

[0142] t3 is the moment when the grid voltage returns to the voltage before the fault and the reactive power begins to withdraw.

[0143] t4 is the moment when the reactive power recovers to the state before the fault.

[0144] t5 is the moment when the active power recovers to the state before the fault.

[0145] It should be noted that, in the following description, the time t1-t3 is defined as the preset first stage, and the time t3-t5 is defined as the preset second stage.

[0146] In an embodiment of the present invention, a low voltage ride-through simulation is performed on a simulation modeling platform to obtain power generation unit test data of each power generation unit in a new energy station.

[0147] Step 203: compare the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit.

[0148] In the embodiment of the present invention, the test data of each virtual-controlled power generation unit is compared with the test data of the actual-controlled power generation unit.

[0149] Step 204: When the test data of the virtual-controlled power generation unit is compared and found to be consistent with the test data of the actual-controlled power generation unit, the controller parameters associated with the actual-controlled power generation unit are used as the target simulation controller parameters of the virtual-controlled power generation unit.

[0150] In an embodiment of the present invention, when the test data of the virtual-controlled power generation unit is consistent with the test data of the actual-controlled power generation unit, that is, the effective value waveform of the grid-connected point voltage, the active power waveform of the power generation unit and the reactive power waveform of the power generation unit are all consistent, the controller parameters associated with the actual-controlled power generation unit are directly used as the target simulation controller parameters of the virtual-controlled power generation unit, that is, the control parameters of the physical controller connected to the virtual-controlled power generation unit in the new energy station are adjusted to be consistent with the controller parameters connected to the actual-controlled power generation unit.

[0151] Step 205: When the test data of the virtual-controlled power generation unit is inconsistent with the test data of the actual-controlled power generation unit, the initial simulation controller parameters of the virtual-controlled power generation unit are adjusted until the preset adjustment conditions are met, and the target simulation controller parameters are output.

[0152] Further, the initial simulation controller parameters include reactive support coefficient, reactive current recovery rate, active current recovery rate and current inner loop coefficient, the target simulation controller parameters include first-stage target simulation controller parameters and second-stage target simulation controller parameters, and step 205 may include the following sub-steps:

[0153] Please note that Figure 8 , Figure 8 The figure is a schematic diagram of the simulation controller model under low voltage ride-through simulation. In the low voltage ride-through simulation, two-stage adjustment is required. The controller parameters of the simulation controller model corresponding to the virtual-controlled power generation unit need to be adjusted so that the low voltage ride-through response of the virtual-controlled power generation unit is consistent with the low voltage ride-through response of the real-controlled power generation unit. The following is divided into the first stage and the second stage adjustment steps:

[0154] In the preset first stage, that is, the command value of the dq axis current at time t1-t3, the new energy unit gives priority to providing reactive power. The reactive current reference value of the first stage is set to:

[0155] (1)

[0156] In the formula, represents the first reactive current reference value, Indicates the reactive current reference value before the fault occurs. represents the reactive support coefficient, Indicates the preset voltage, It represents the d-axis voltage of the grid connection point in the dq synchronous rotating coordinate system, Indicates the rated current of the new energy unit. Indicates reactive current limitation.

[0157] The active current reference value of the first stage is set as:

[0158] (2)

[0159] In the formula, Indicates the first active current reference value, Indicates the maximum current, Indicates the d-axis current rated reference value.

[0160] In the preset second stage, that is, the command value of the dq axis current at time t3-t5, the reactive current reference value of the second stage is set to:

[0161] (3)

[0162] In the formula, represents the second reactive current reference value, Represents the reactive current recovery rate, Indicates the current moment, Indicates the time when reactive power recovers to the state before the fault. Represents the reactive power at time t4.

[0163] The active current reference value of the second stage is set as:

[0164] (4)

[0165] In the formula, Indicates the second active current reference value, Indicates the active current recovery rate, Represents the active power at time t4.

[0166] In both the preset first stage and the preset second stage, the following formula (5) is used to generate the dq axis modulation wave reference value:

[0167] The reference value of the d-axis modulation wave is:

[0168] The reference value of the q-axis modulation wave is:

[0169] In the formula, Indicates the d-axis modulation wave reference value, Indicates synchronous speed, represents the inductance of the AC filter under reactive current, represents the current inner loop proportional coefficient, represents the first reactive current reference value or the second reactive current reference value, Indicates the active current feedback value, represents the current inner loop integral coefficient, Indicates the q-axis modulation wave reference value, represents the inductance of the AC filter under active current, represents the first active current reference value or the second active current reference value, Indicates the reactive current feedback value.

[0170] It should be noted that when and When it is the first active current reference value and the first reactive current reference value, what is adjusted is the virtual controlled dq axis voltage of the first stage, and what is generated is the d axis modulation wave reference value and the q axis modulation wave reference value of the first stage. The second stage is similar and will not be repeated here.

[0171] S21. Adjust the reactive power support coefficient of the virtual-controlled power generation unit until the reactive power of the virtual-controlled power generation unit in the preset first stage under the low voltage ride-through simulation is consistent with that of the actual-controlled power generation unit, and use the reactive power support coefficient at the current moment as the first stage target simulation controller parameter.

[0172] In the embodiment of the present invention, by adjusting the reactive power support coefficient of the virtual control power generation unit The reactive power of the virtual-controlled power generation unit from time t1 to t3 can be made consistent with that of the actual-controlled power generation unit, and the reactive support coefficient at the current moment is used as the first-stage target simulation controller parameter.

[0173] S22. Determine a first current reference value according to the reactive support coefficient at the current moment, wherein the first current reference value includes a first active current reference value and a first reactive current reference value.

[0174] In the embodiment of the present invention, according to the reactive support coefficient at the current moment, a first reactive current reference value is obtained based on the above formula (1), and then substituted into formula (2) to obtain a first active current reference value.

[0175] S23. Based on the first current reference value, the first-stage virtual-controlled dq-axis voltage is adjusted by adjusting the current inner-loop coefficient of the virtual-controlled power generation unit. When the first-stage dq-axis voltage is consistent with the first-stage actual-controlled dq-axis voltage of the actual-controlled power generation unit, the current inner-loop coefficient at the current moment is used as the first-stage target simulation controller parameter.

[0176] It should be noted that the current inner loop coefficient includes the current inner loop proportional coefficient and the current inner loop integral coefficient.

[0177] In the embodiment of the present invention, the first current reference value is substituted into formula (5), and the current inner loop proportional coefficient of the virtual control power generation unit is adjusted. and the current inner loop integral coefficient , until it is equal to the current inner loop proportional coefficient of the actual control power generation unit and the current inner loop integral coefficient At this time, if the first-stage dq axis voltage in the preset first stage is consistent with the first-stage actual control dq axis voltage of the actual control power generation unit, the current inner loop coefficient at the current moment is used as the first-stage target simulation controller parameter.

[0178] S24, adjust the reactive current recovery rate and the active current recovery rate of the virtual-controlled power generation unit until the reactive power recovery rate of the virtual-controlled power generation unit and the actual-controlled power generation unit in the preset second stage under the low voltage ride-through simulation is consistent, and the active power recovery rate of the virtual-controlled power generation unit and the actual-controlled power generation unit is consistent, then use the reactive current recovery rate and the active current recovery rate at the current moment as the second stage target simulation controller parameters.

[0179] In the embodiment of the present invention, by adjusting the reactive current recovery rate of the virtual control power generation unit and the recovery rate of active current , the active power recovery rate and reactive power recovery rate of the virtual-controlled power generation unit from t3 to t5 can be made consistent with those of the actual-controlled power generation unit, and the reactive current recovery rate and active current recovery rate at the current moment are used as the second-stage target simulation controller parameters.

[0180] S25. Determine a second current reference value according to a reactive current recovery rate and an active current recovery rate at a current moment, wherein the second current reference value includes a second active current reference value and a second reactive current reference value.

[0181] In the embodiment of the present invention, according to the reactive current recovery rate at the current moment, the second reactive current reference value is obtained based on the above formula (3), and according to the active current recovery rate at the current moment, it is then substituted into formula (4) to obtain the second active current reference value.

[0182] S26. Based on the second current reference value, the second-stage virtual-controlled dq-axis voltage is adjusted by adjusting the current inner-loop coefficient of the virtual-controlled power generation unit. When the second-stage dq-axis voltage is consistent with the second-stage actual-controlled dq-axis voltage of the actual-controlled power generation unit, the current inner-loop coefficient at the current moment is used as the second-stage target simulation controller parameter.

[0183] In the embodiment of the present invention, the second current reference value is substituted into formula (5), and the current inner loop proportional coefficient of the virtual control power generation unit is adjusted. and the current inner loop integral coefficient , until it is equal to the current inner loop proportional coefficient of the actual control power generation unit and the current inner loop integral coefficient At this time, if the second-stage dq axis voltage in the preset second stage is consistent with the second-stage actual control dq axis voltage of the actual control power generation unit, the current inner loop coefficient at the current moment is used as the second-stage target simulation controller parameter.

[0184] Step 206: Use the target simulation controller parameters as control parameters of the physical controller of the associated virtual-controlled power generation unit.

[0185] In the embodiment of the present invention, the control parameters of the physical controller connected to the virtual control power generation unit in the new energy station are adjusted to the target simulation controller parameters.

[0186] In the present invention, in response to a simulation modeling request for a new energy station, a simulation modeling platform for the new energy station is built; a low voltage ride-through simulation is performed on the simulation modeling platform to obtain test data of the power generation unit of the new energy station, the power generation unit test data including test data of the actual control power generation unit and test data of multiple virtual control power generation units; the test data of each virtual control power generation unit is compared with the test data of the actual control power generation unit; target simulation controller parameters of multiple virtual control power generation units in the new energy station are determined according to the comparison results; and the target simulation controller parameters are used as control parameters of the physical controller of the associated virtual control power generation unit.

[0187] The present invention builds a simulation modeling platform that interactively connects the virtual model of the new energy station with the physical equipment, and conducts a low voltage ride-through simulation test. The controller parameters of the power generation unit are adjusted according to the simulation test structure, so as to obtain the control parameters of the physical controllers of multiple virtual-controlled power generation units in the new energy station under actual working conditions, so as to ensure the stable operation of the new energy station during a low voltage ride-through fault, and solves the technical problem of how to determine the controller parameters of the physical controller of the power generation unit of the new energy station to improve the operating stability of the new energy station.

[0188] See also Fig. 9 , Fig. 9 This is a structural block diagram of a real-time simulation test modeling system for a new energy station provided in Example 3 of the present invention.

[0189] The present invention provides a real-time simulation test modeling system for a new energy station, comprising:

[0190] A response module 301 is used to respond to a simulation modeling request for a new energy station and build a simulation modeling platform for the new energy station;

[0191] The simulation module 302 is used to perform low voltage ride-through simulation on the simulation modeling platform to obtain the power generation unit test data of the new energy station, where the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data;

[0192] A comparison module 303 is used to compare the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit;

[0193] The data processing module 304 is used to determine the target simulation controller parameters of the multiple virtual control power generation units in the new energy station according to the comparison results;

[0194] The data output module 305 is used to use the target simulation controller parameters as control parameters of the physical controller of the associated virtual-controlled power generation unit.

[0195] Furthermore, the new energy station includes a power grid access, a monitoring device, a communication interface device, a plurality of power generation units and a plurality of entity controllers connected to the power generation units, and the response module 301 includes:

[0196] The power generation unit determination submodule is used to respond to the simulation modeling request for the new energy station, and select any one power generation unit from multiple power generation units as the actual control power generation unit, and the remaining power generation units as virtual control power generation units;

[0197] A target controller submodule, used to use the entity controller connected to the actual control power generation unit as a target controller;

[0198] The model building submodule is used to build an equivalent power grid model connected to the power grid, a real control main loop model of a real control power generation unit, and a virtual control main loop model and a simulation controller model of multiple virtual control power generation units through a real-time simulator, and the virtual control main loop model and the simulation controller model are connected one by one;

[0199] The coupling submodule is used to couple the monitoring device, the communication interface device, the target controller and the real-time simulator to build a simulation modeling platform for the new energy station.

[0200] Furthermore, the coupling submodule includes:

[0201] A first connection unit is used to connect the real control main loop model and the plurality of virtual control main loop models with an equivalent power grid model;

[0202] A second connection unit is used to connect the target controller to the actual control main loop model through a communication interface device;

[0203] A third connection unit, used to connect the monitoring device to the target controller;

[0204] The fourth connection unit is used to connect multiple simulation controller models to the monitoring device through the communication interface device to build a simulation modeling platform for the new energy station.

[0205] Furthermore, the power generation unit test data includes the grid connection point voltage effective value waveform, the power generation unit active power waveform and the power generation unit reactive power waveform.

[0206] Furthermore, the data processing module 304 includes:

[0207] The first comparison result processing submodule is used for taking the controller parameters associated with the actual control power generation unit as the target simulation controller parameters of the virtual control power generation unit when the test data of the virtual control power generation unit is consistent with the test data of the actual control power generation unit;

[0208] The second comparison result processing submodule is used to adjust the initial simulation controller parameters of the virtual control power generation unit when the test data of the virtual control power generation unit is inconsistent with the test data of the actual control power generation unit, until the preset adjustment conditions are met, and output the target simulation controller parameters.

[0209] Furthermore, the initial simulation controller parameters include reactive support coefficient, reactive current recovery rate, active current recovery rate and current inner loop coefficient, the target simulation controller parameters include first-stage target simulation controller parameters and second-stage target simulation controller parameters, and the second comparison result processing submodule includes:

[0210] The first adjustment unit is used to adjust the reactive power support coefficient of the virtual-controlled power generation unit until the reactive power of the virtual-controlled power generation unit in the preset first stage under the low voltage ride-through simulation is consistent with that of the actual-controlled power generation unit, and the reactive power support coefficient at the current moment is used as the first stage target simulation controller parameter;

[0211] A first current reference value unit, used to determine a first current reference value according to a reactive support coefficient at a current moment;

[0212] The second adjustment unit is used to adjust the first-stage virtual-controlled dq-axis voltage by adjusting the current inner loop coefficient of the virtual-controlled power generation unit based on the first current reference value, and when the first-stage dq-axis voltage is consistent with the first-stage actual-controlled dq-axis voltage of the actual-controlled power generation unit, the current inner loop coefficient at the current moment is used as the first-stage target simulation controller parameter;

[0213] The third adjustment unit is used to adjust the reactive current recovery rate and the active current recovery rate of the virtual-controlled power generation unit until the reactive power recovery rate of the virtual-controlled power generation unit and the actual-controlled power generation unit in the preset second stage under the low voltage ride-through simulation is consistent, and the active power recovery rate of the virtual-controlled power generation unit and the actual-controlled power generation unit is consistent, and the reactive current recovery rate and the active current recovery rate at the current moment are used as the second stage target simulation controller parameters;

[0214] A second current reference value unit, used to determine a second current reference value according to a reactive current recovery rate and an active current recovery rate at a current moment;

[0215] The fourth adjustment unit is used to adjust the second-stage virtual-controlled dq-axis voltage by adjusting the current inner-loop coefficient of the virtual-controlled power generation unit based on the second current reference value. When the second-stage dq-axis voltage is consistent with the second-stage actual-controlled dq-axis voltage of the actual-controlled power generation unit, the current inner-loop coefficient at the current moment is used as the second-stage target simulation controller parameter.

[0216] In the present invention, in response to a simulation modeling request for a new energy station, a simulation modeling platform for the new energy station is built; a low voltage ride-through simulation is performed on the simulation modeling platform to obtain test data of the power generation unit of the new energy station, the power generation unit test data including test data of the actual control power generation unit and test data of multiple virtual control power generation units; the test data of each virtual control power generation unit is compared with the test data of the actual control power generation unit; target simulation controller parameters of multiple virtual control power generation units in the new energy station are determined according to the comparison results; and the target simulation controller parameters are used as control parameters of the physical controller of the associated virtual control power generation unit.

[0217] The present invention builds a simulation modeling platform that interactively connects the virtual model of the new energy station with the physical equipment, and conducts a low voltage ride-through simulation test. The controller parameters of the power generation unit are adjusted according to the simulation test structure, so as to obtain the control parameters of the physical controllers of multiple virtual-controlled power generation units in the new energy station under actual working conditions, so as to ensure the stable operation of the new energy station during a low voltage ride-through fault, and solves the technical problem of how to determine the controller parameters of the physical controller of the power generation unit of the new energy station to improve the operating stability of the new energy station.

[0218] See also Fig.10 , Fig.10 This is a structural block diagram of a computer device provided in Embodiment 4 of the present invention.

[0219] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402, wherein the memory 402 stores a computer program; when the computer program is executed by the processor 402, the processor 402 executes a real-time simulation test modeling method for a new energy station as described in any of the above embodiments.

[0220] The memory 401 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk or a ROM. The memory 401 has a storage space 403 for a program code 413 for executing any method step in the above method. For example, the storage space 403 for the program code may include individual program codes 413 for implementing the various steps in the above method, respectively. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. The program code may be compressed, for example, in an appropriate form. When these codes are run by a computing and processing device, the computing and processing device performs the various steps in the method described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. The program code may be compressed, for example, in an appropriate form. When these codes are executed by a computing and processing device, they cause the computing and processing device to execute the various steps in the real-time simulation test modeling method for the new energy station described above.

[0221] Embodiment 5 of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the real-time simulation test modeling method for a new energy station as described in any of the above embodiments is implemented.

[0222] Embodiment 6 of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the real-time simulation test modeling method for a new energy station as described in any of the above embodiments.

[0223] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0224] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0225] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0226] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0227] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0228] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A real-time simulation test modeling method for a new energy station, characterized in that: include: Responding to a simulation modeling request for a new energy station, and building a simulation modeling platform for the new energy station; Performing low voltage ride-through simulation on the simulation modeling platform to obtain power generation unit test data of the new energy station, wherein the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data; respectively comparing the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit; Determine target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison results; The target simulation controller parameters are used as control parameters of the physical controller of the associated virtual-controlled power generation unit.

2. The real-time simulation test modeling method for a new energy station according to claim 1 is characterized in that: The new energy station includes a power grid access, a monitoring device, a communication interface device, a plurality of power generation units and a plurality of entity controllers connected to the power generation units, and the response to the simulation modeling request for the new energy station is to build a simulation modeling platform for the new energy station; In response to a simulation modeling request for a new energy station, one power generation unit is randomly selected from the plurality of power generation units as a real-control power generation unit, and the remaining power generation units are selected as virtual-control power generation units; Using a physical controller connected to the actual control power generation unit as a target controller; An equivalent power grid model of the access power grid, a real control main loop model of the real control power generation unit, and a virtual control main loop model and a simulation controller model of multiple virtual control power generation units are constructed by a real-time simulator, wherein the virtual control main loop model is connected to the simulation controller model in a one-to-one correspondence; The monitoring device, the communication interface device, the target controller and the real-time simulator are coupled and connected to build a simulation modeling platform for the new energy station.

3. The real-time simulation test modeling method for a new energy station according to claim 2 is characterized in that: The monitoring device, the communication interface device, the target controller and the real-time simulator are coupled and connected to build a simulation modeling platform for the new energy station, including: Connecting the real control main loop model and a plurality of the virtual control main loop models with the equivalent power grid model; Connecting the target controller to the actual control main loop model via the communication interface device; connecting the monitoring device to the target controller; The plurality of simulation controller models are respectively connected to the monitoring device via the communication interface device to build a simulation modeling platform for the new energy station.

4. The real-time simulation test modeling method for a new energy station according to claim 1 is characterized in that: The power generation unit test data includes the grid connection point voltage effective value waveform, the power generation unit active power waveform and the power generation unit reactive power waveform.

5. The real-time simulation test modeling method for a new energy station according to claim 4 is characterized in that: The step of determining target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison results includes: When the test data of the virtual-controlled power generation unit is consistent with the test data of the actual-controlled power generation unit, the controller parameters associated with the actual-controlled power generation unit are used as the target simulation controller parameters of the virtual-controlled power generation unit; When the test data of the virtual-controlled power generation unit is inconsistent with the test data of the actual-controlled power generation unit, the initial simulation controller parameters of the virtual-controlled power generation unit are adjusted until the preset adjustment conditions are met, and the target simulation controller parameters are output.

6. The real-time simulation test modeling method for a new energy station according to claim 5 is characterized in that: The initial simulation controller parameters include reactive support coefficient, reactive current recovery rate, active current recovery rate and current inner loop coefficient, the target simulation controller parameters include first-stage target simulation controller parameters and second-stage target simulation controller parameters, and the initial simulation controller parameters of the virtual control power generation unit are adjusted until the preset adjustment conditions are met, and the target simulation controller parameters are output, including: Adjust the reactive power support coefficient of the virtual-controlled power generation unit until the reactive power of the virtual-controlled power generation unit and the real-controlled power generation unit in the preset first stage of low voltage ride-through simulation are consistent, and use the reactive power support coefficient at the current moment as the first stage target simulation controller parameter; Determine a first current reference value according to the reactive support coefficient at the current moment; Based on the first current reference value, the first-stage virtual-control dq-axis voltage is adjusted by adjusting the current inner loop coefficient of the virtual-control power generation unit, and when the first-stage dq-axis voltage is consistent with the first-stage actual-control dq-axis voltage of the actual-control power generation unit, the current inner loop coefficient at the current moment is used as the first-stage target simulation controller parameter; Adjust the reactive current recovery rate and the active current recovery rate of the virtual-controlled power generation unit until the reactive power recovery rate of the virtual-controlled power generation unit is consistent with that of the actual-controlled power generation unit in the preset second stage under the low voltage ride-through simulation, and the active power recovery rate of the virtual-controlled power generation unit is consistent with that of the actual-controlled power generation unit, and then use the reactive current recovery rate and the active current recovery rate at the current moment as the target simulation controller parameters of the second stage; Determining a second current reference value according to the reactive current recovery rate and the active current recovery rate at the current moment; Based on the second current reference value, the second-stage virtual-control dq-axis voltage is adjusted by adjusting the current inner-loop coefficient of the virtual-control power generation unit. When the second-stage dq-axis voltage is consistent with the second-stage actual-control dq-axis voltage of the actual-control power generation unit, the current inner-loop coefficient at the current moment is used as the second-stage target simulation controller parameter.

7. A real-time simulation test modeling system for a new energy station, characterized in that: include: A response module, used to respond to a simulation modeling request for a new energy station and build a simulation modeling platform for the new energy station; A simulation module, used to perform low voltage ride-through simulation on the simulation modeling platform to obtain power generation unit test data of the new energy station, wherein the power generation unit test data includes actual control power generation unit test data and multiple virtual control power generation unit test data; A comparison module, used to compare the test data of each virtual-controlled power generation unit with the test data of the actual-controlled power generation unit; A data processing module, used to determine target simulation controller parameters of multiple virtual-controlled power generation units in the new energy station according to the comparison results; The data output module is used to use the target simulation controller parameters as control parameters of the physical controller of the associated virtual-controlled power generation unit.

8. An electronic device, characterized in that: It includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the real-time simulation test modeling method for a new energy station as described in 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, the real-time simulation test modeling method of the new energy station as described in any one of claims 1-6 is implemented.

10. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the real-time simulation test modeling method for a new energy station as described in any one of claims 1-6.

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