New energy power station simulation system and method

Abstract

The application provides a new energy power station simulation system and method, wherein the new energy power station simulation system comprises a new energy power station simulation model, the new energy power station simulation model comprises a power grid model, a power conversion model and a parameter transmission model, and the parameter transmission model is used for transmitting voltage and current between the power grid model and the power conversion model without direct connection between the power grid model and the power conversion model. The new energy power station simulation system and method provided by the application can avoid numerical oscillation of the voltage and current provided to the power grid model, and improve the simulation accuracy of the new energy power station simulation system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, and particularly relates to a new energy power station simulation system and method. BACKGROUND

[0002] With the continuous development of new energy technology, more and more new energy power stations are put into use. Among them, the new energy power station includes new energy power generation equipment, power converters and controllers, etc., the new energy power generation equipment can be used to generate direct current, and the controller is used to control the power converter to convert the direct current into alternating current provided to the power grid, thereby providing power to the power grid.

[0003] In the prior art, in the design, verification and other processes of the new energy power station, the operator needs to simulate and verify the units such as the power converter and the controller in the new energy power station through the simulation machine and other simulation devices, so as to timely find and solve the problems existing in the new energy power station, and ensure the stable operation of the new energy power station in the subsequent actual production and use process.

[0004] When the number of power converters in the new energy power station is large, the values of the voltage and current provided by the multiple power conversion models simulated by the simulation machine to the power grid model will oscillate, thereby affecting the simulation accuracy of the new energy power station. SUMMARY

[0005] The present application provides a new energy power station simulation system and method, which is used to solve the technical problem of low simulation accuracy of the new energy power station in the prior art.

[0006] The first aspect of the present application provides a new energy power station simulation system, which comprises a new energy power station simulation model. The new energy power station simulation model comprises a power grid model, a parameter transmission model and a power converter model. The power grid model is connected to the power conversion model through the parameter transmission model. Specifically, the parameter transmission model is used to provide an input voltage to the power conversion model according to the output voltage of the power grid model, and the voltage value of the output voltage of the power grid model is equal to the voltage value of the input voltage of the power conversion model. At the same time, the parameter transmission model is also used to provide an input current to the power grid model according to the output current of the power conversion model. The current value of the input current of the power grid model is N times the current value of the output current of the power conversion model.

[0007] In the new energy simulation system provided in the embodiment, the parameter transmission model can realize transmission of voltage and current between the power conversion model and the power grid model without direct connection between the power conversion model and the power grid model. In particular, the parameter transmission model can realize multiplication processing of the output current of the power conversion model and provide the input current of the power grid model. Since the parameter transmission model does not directly multiply the alternating current, the current provided by the parameter transmission model to the power grid model will not oscillate in value, thereby improving the simulation accuracy of the new energy power station simulation system online simulation and making the simulation values more stable.

[0008] In an embodiment of the first aspect of the application, the parameter transmission model specifically comprises: a current measurement module, a multiplication module and a current source module connected in sequence between the output end of the power conversion model and the input end of the power grid model. The current measurement module measures the current value of the output current of the power conversion model, the multiplication module is used to multiply the current value of the output current of the power conversion model by N to obtain the current value of the input current of the power grid model. The current source module generates the input current of the power grid model according to the current value of the input current of the power grid model and inputs it to the power grid model.

[0009] In the new energy power station simulation system provided in the embodiment, the parameter transmission model can measure the output current of the power conversion model through the current measurement module and generate the input current of the power grid model through the current source module. The parameter transmission model provided in the embodiment disconnects the connection between the power grid model and the power conversion model in a relatively simple and effective manner, so that the current can be transmitted between the power grid model and the power conversion model without direct transmission of alternating current, thereby making the structure of the parameter transmission model and the simulation system of the new energy power station in which it is located relatively simple, while also having relatively high simulation accuracy.

[0010] In an embodiment of the first aspect of the application, the parameter transmission model further comprises: a voltage measurement module and a voltage source module connected in sequence between the output end of the power grid model and the input end of the power conversion model. The voltage measurement module measures the voltage value of the output voltage of the power grid model, and the voltage source module generates the input voltage of the power conversion model according to the voltage value of the output voltage of the power grid model and inputs it to the power conversion model.

[0011] In the new energy power station simulation system provided in the embodiment, the parameter transmission model can measure the output voltage of the power grid model through the voltage measurement module and generate the input voltage of the power conversion model through the voltage source module. The parameter transmission model provided in the embodiment disconnects the connection between the power grid model and the power conversion model in a relatively simple and effective manner, so that the voltage can be transmitted between the power grid model and the power conversion model without direct transmission of alternating current, thereby making the structure of the parameter transmission model and the simulation system of the new energy power station in which it is located relatively simple, while also having relatively high simulation accuracy.

[0012] In an embodiment of the first aspect of the application, the new energy power station simulation system further comprises a controller connected to the new energy power station simulation model. The power conversion model further sends a data signal to the controller, and the power conversion model further receives a data signal sent by the controller. The data signal is used to represent the working state of the power conversion model. The controller further sends a control signal to the power conversion model, and the power conversion model is configured to receive the control signal. The control signal is used to control the output current of the power conversion model.

[0013] In the new energy power station simulation system provided in the embodiment, the online simulation scenario of the controller in the loop is realized by providing a controller directly connected to the new energy power station simulation system, thereby realizing the online simulation of the new energy power station simulation system in a relatively simple and effective manner, and enabling the embodiment to be applied to different types of simulation.

[0014] In an embodiment of the first aspect of the application, the new energy power station simulation model further comprises a processing module. The processing module is connected between the current measurement module and the multiplication module, and the processing module is also connected between the voltage measurement module and the voltage source module. The current measurement module transmits the current value of the output current of the power conversion model to the multiplication module through the processing module, and the voltage measurement module transmits the voltage value of the output voltage of the power grid model to the voltage source module through the processing module. For example, the processing module can be an eHS module.

[0015] In the new energy power station simulation system provided in the embodiment, for the online simulation scenario of the controller in the loop, the transmission of current values and voltage values between modules is more effectively realized through the processing module. Since the processing module can be implemented using existing technologies in the simulation machine, the embodiment can realize the simulation of the new energy power station simulation system without modifying the simulation machine, thereby reducing the simulation cost of the new energy power station simulation system and improving the simulation efficiency.

[0016] In an embodiment of the first aspect of the application, the simulation machine runs a CPU simulation unit and an FPGA simulation unit. In the new energy power station simulation model, the power grid model, the processing module, the voltage measurement module, the current source module, and the multiplication module are simulated by the CPU simulation unit of the simulation machine. The power conversion model, the voltage source module, and the current detection module are simulated by the FPGA simulation unit of the simulation machine.

[0017] In the new energy power station simulation system provided in the embodiment, the simulation machine can realize the simulation of corresponding modules and models through the CPU simulation unit and the FPGA simulation unit respectively, thereby ensuring that each module and model is implemented in the corresponding simulation unit, ensuring the normal implementation of the simulation, and improving the stability of the simulation.

[0018] In an embodiment of the first aspect of the application, the new energy power station simulation model further comprises a controller model connected to the power conversion model. The power conversion model further sends a data signal to the controller model, and the power conversion model further receives a data signal sent by the controller model. The data signal is used to represent the working state of the power conversion model. The controller model further sends a control signal to the power conversion model, and the power conversion model is configured to receive the control signal. The control signal is used to control the output current of the power conversion model.

[0019] In the new energy power station simulation system provided in the embodiment, the off-line simulation scene of the entire new energy power station simulation model is realized through the controller model provided in the new energy power station simulation model, so that the off-line simulation of the new energy power station simulation system is realized in a relatively simple and effective manner, and the embodiment can be applied to different types of simulation.

[0020] In an embodiment of the first aspect of the application, the new energy power station simulation model further comprises a new energy power generation equipment model connected to the power conversion model. The new energy power generation equipment model provides direct current to the power conversion model. The power conversion model converts the direct current provided by the new energy power generation equipment into alternating current to obtain the output current of the power conversion model.

[0021] In the new energy power station simulation system provided in the embodiment, the power conversion model can provide the output current to the power grid through the energy provided by the new energy power generation equipment, so that the entire new energy power station simulation system is more complete, and the new energy power station including the new energy power generation equipment can be simulated, thereby enriching the application scenarios of the embodiment.

[0022] In an embodiment of the first aspect of the application, the new energy power generation equipment model comprises at least one of a photovoltaic power generation equipment model, a wind power generation equipment model, and a diesel power generation equipment model.

[0023] In the new energy power station simulation system provided in the embodiment, the new energy power generation equipment can generate power in multiple ways, so that the application scenarios of the embodiment are enriched, and the promotion and use of the embodiment are facilitated.

[0024] In an embodiment of the first aspect of the application, the power conversion model comprises a photovoltaic inverter model or a energy storage converter model.

[0025] In the new energy power station simulation system provided in the embodiment, the power conversion model can realize power conversion in multiple ways, so that the application scenarios of the embodiment are enriched, and the promotion and use of the embodiment are facilitated.

[0026] In an embodiment of the first aspect of the application, the power grid model comprises a power system model, a micro-grid model, or a voltage source model.

[0027] In the new energy power plant simulation system provided in the embodiment, the power grid model can be implemented in various ways, thereby enriching the application scenarios of the embodiment and facilitating the promotion and use of the embodiment.

[0028] The second aspect of the application provides a new energy power plant simulation method, which can be applied to the new energy power plant simulation system provided in any one of the first aspect of the application. The new energy power plant simulation method comprises: measuring the output voltage of the power grid model. The input voltage is provided to the power conversion model through the parameter transmission model, and the voltage value of the input voltage of the power conversion model is equal to the voltage value of the output voltage of the power grid model. The output current of the power conversion model is measured. The input current is provided to the power grid model through the parameter transmission model, and the current value of the input current of the power grid model is equal to N times the current value of the output current of the power conversion model, and N is a positive integer.

[0029] In an embodiment of the second aspect of the application, the parameter transmission model comprises: a current measurement module, a multiplication module and a current source module connected in sequence between the output end of the power conversion model and the input end of the power grid model. The output current of the power conversion model is measured, comprising: measuring the output current of the power conversion model through the current measurement module. The input current is provided to the power grid model through the parameter transmission model, comprising: multiplying the current value of the output current of the power conversion model by N through the multiplication module to obtain the current value of the input current of the power grid model. The input current of the power grid model is generated through the current source module and input to the power grid model.

[0030] In an embodiment of the second aspect of the application, the parameter transmission model further comprises: a voltage measurement module and a voltage source module connected in sequence between the output end of the power grid model and the input end of the power conversion model. The output voltage provided by the power grid model is measured, comprising: measuring the output voltage of the power grid model through the voltage measurement module. The input voltage is provided to the power conversion model through the parameter transmission model, comprising: generating the input voltage of the power conversion model through the current source module and inputting to the power conversion model.

[0031] In an embodiment of the second aspect of the application, the new energy power plant simulation system further comprises a controller connected with the new energy power plant simulation model, and the new energy power plant simulation method further comprises: sending a control signal to the power conversion model through the controller, the control signal being used to control the output current of the power conversion model, and / or sending a data signal to the controller through the power conversion model, the data signal being used to represent the working state of the power conversion model.

[0032] In an embodiment of the second aspect of the present application, the new energy power station simulation model further comprises a processing module connected between the current measurement module and the multiplication module, the processing module is also connected between the voltage measurement module and the voltage source module, and the new energy power station simulation method further comprises: transmitting the current value of the output current of the power conversion model to the multiplication module through the processing module. Transmitting the voltage value of the output voltage of the power grid model to the voltage source module through the processing module.

[0033] In an embodiment of the second aspect of the present application, the new energy power station simulation model further comprises a controller model connected with the power conversion model, and the new energy power station simulation method further comprises: sending a control signal to the power conversion model through the controller model, the control signal being used to control the output current of the power conversion model, and / or sending a data signal to the controller model through the power conversion model, the data signal being used to represent the working state of the power conversion model. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0035] Figure 1 A schematic diagram of a new energy power station provided by the present application;

[0036] Figure 2 A schematic diagram of a new energy power station simulation system in the prior art;

[0037] Figure 3 A schematic diagram of another new energy power station simulation system in the prior art;

[0038] Figure 4 A schematic diagram of another new energy power station simulation system in the prior art;

[0039] Figure 5 A schematic diagram of an embodiment of the new energy power station simulation system provided by the present application;

[0040] Figure 6 A schematic diagram of another embodiment of the photovoltaic simulation system provided by the present application;

[0041] Figure 7 A schematic diagram of the output current of the power conversion model in the new energy power station simulation system provided by the present application;

[0042] Figure 8 A schematic diagram of the input current of the power grid model in the new energy power station simulation system provided by the present application;

[0043] Figure 9 A detailed schematic diagram of the grid model input current provided for the present application;

[0044] Figure 10 A schematic diagram of the power conversion model output power in the new energy power station simulation system provided for the present application;

[0045] Figure 11 A schematic diagram of the grid model input power in the new energy power station simulation system provided for the present application;

[0046] Figure 12 A comparison diagram of impedance scan amplitude before and after the new energy power station simulation model multiplies the current provided for the present application;

[0047] Figure 13 A comparison diagram of impedance scan phase before and after the new energy power station simulation model multiplies the current provided for the present application;

[0048] Figure 14 A schematic diagram of a new energy power station simulation model provided for the present application;

[0049] Figure 15 A schematic diagram of another new energy power station simulation model provided for the present application;

[0050] Figure 16 A flowchart of an embodiment of a new energy power station simulation method provided for the present application;

[0051] Figure 17 A structural schematic diagram of an embodiment of an electronic device provided for the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part 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 of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0053] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] Figure 1 A schematic diagram of a new energy power station provided in this application, such as... Figure 1 The new energy power stations shown can specifically be photovoltaic power stations, energy storage power stations, or microgrids, etc. Specifically, for example... Figure 1 The illustrated new energy power station includes a power grid 1, a power converter 2, a controller 3, and new energy power generation equipment 4. The new energy power generation equipment 4 is used to convert solar energy into electrical energy. The new energy power generation equipment 4 is used to provide direct current (DC) power to the power converter 2 based on the electrical energy generated by the photovoltaic modules.

[0055] Power converter 2 is used to convert the direct current (DC) supplied by the new energy power generation equipment 4 into alternating current (AC), and then supply AC to the power grid 1. Through the conversion process of power converter 2, the electrical energy generated by the new energy power generation equipment 4 is ultimately transmitted to the power grid 1 in the form of AC, thereby increasing the power of the power grid 1. Power converter 2 can be a photovoltaic inverter or an energy storage converter, etc.

[0056] Controller 3 can be used to control power converter 2. For example, controller 3 can be used to control the power converter 2 to turn on and off, thereby controlling whether power converter 2 supplies AC power to grid 1. Alternatively, controller 3 can be used to control the on and off states of the switching transistors in power converter 2, thereby controlling parameters such as the current value of the AC power supplied by power converter 2 to grid 1. This application embodiment does not limit the specific control performed by controller 3 on power converter 2. For example, controller 3 can control the current value of AC power output by power converter 2 to grid 1 based on the voltage of grid 1; that is, the current value of AC power output by power converter 2 is related to the voltage of grid 1.

[0057] In some embodiments, the power converter 2 can send a data signal AO to the controller 3, where the data signal AO is used to represent the working state of the power converter 2, and the data signal AO can be an analog signal. The controller 3 receives the data signal AO, and determines the voltage of the power grid 1, the current of the alternating current AC output by the power converter 2, and the like according to the data signal AO. Subsequently, the controller 3 can generate a control signal DI according to the voltage of the power grid 1, the current of the alternating current AC output by the power converter 2, and the like, and send the control signal DI to the power converter 2. Finally, the power converter 2 can receive the control signal DI, and adjust the current of the alternating current AC output by the power converter 2 according to the control signal DI, so as to realize the closed-loop feedback control of the controller 3 on the power converter 2. The control signal DI can be used to control the current of the alternating current AC output by the power converter 2 to the power grid 1, and the control signal DI can be a digital signal.

[0058] In some cases, the controller 3 and the power converter 2 can be independent devices, and the controller 3 can be arranged inside or outside the power converter 2. Alternatively, in other cases, the controller 3 can also be a related control device in the power converter 2, such as an integrated circuit (IC) and the like.

[0059] In the new energy power station as shown in Figure 1 Before the new energy power station is actually applied, the experimenters can also verify and test the power converter 2 and the like in the new energy power station in a simulated manner, so as to troubleshoot and solve the problems that can occur in the actual application of the new energy power station in advance.

[0060] Figure 2 FIG. 1 is a schematic diagram of a new energy power station simulation system in the prior art. The new energy power station simulation system as shown in Figure 2 performs simulation on the new energy power station as shown in Figure 1 . The implementation manner of the simulation can be divided into offline simulation and online simulation, and the online simulation can also be referred to as real-time simulation. The offline simulation completely depends on the simulation machine for implementation, and the online simulation is implemented by means of the simulation machine and the physical device. The online simulation can be further divided into controller-in-loop and power-in-loop, where the controller-in-loop refers to that the controlled object in the simulation system is implemented by simulation, and the controller is implemented by the physical device. The power-in-loop refers to that the controller in the simulation system is implemented by simulation, and the controlled object is implemented by the physical device. In particular, the online simulation of the controller-in-loop has better accuracy and economy, and the embodiments of the present application are described by taking the controlled device as the power converter and the new energy power station simulation system as an example of the online simulation of the controller-in-loop.

[0061] Specifically, as shown in Figure 2The shown new energy power station simulation system includes a simulation machine 00 and a controller 3. The simulation machine 00 is configured to simulate a new energy power station simulation model. In the embodiment, the new energy power station simulation model includes a power grid model 10, a power conversion model 20, and a new energy power generation device model 40, etc. The power grid model 10 is configured to simulate a power grid 1, the power conversion model 20 is configured to simulate a power converter 2, and the new energy power generation device model 40 is configured to simulate a new energy power generation device 4. The controller 3 is connected to the power conversion model 20 in the new energy power station simulation model through an interface a provided by the simulation machine 00. The controller 3 can be configured to send a control signal DI to the power conversion model 20 through the interface a, or receive a data signal AO sent by the power conversion model 20 through the interface a.

[0062] In an embodiment, the power grid model 10 is a model of a device in the new energy power station other than the power conversion model 10. For example, the power grid model can be a power system model, a micro-grid model, or a voltage source model, etc.

[0063] It should be noted that, in the embodiments of the present application, the controlled device in the new energy power station simulation system is taken as the power conversion model 20 as an example. The controlled device can also be other models, and the type of each model can be an average value model or a switching model, etc. The specific simulation implementation of each model is not limited in the embodiments of the present application.

[0064] From Figure 2 As can be seen from the shown new energy power station simulation system, when the controlled object is the power conversion model 20, the controller 3 and the controlled object have a one-to-one correspondence, i.e., one controller 3 is configured to control one power conversion model 20. Then, when simulating the new energy power station, when the new energy power station includes multiple controllers 3, the simulation machine 00 also needs to implement multiple corresponding power conversion models 20 corresponding to the multiple controllers 3 through the new energy power station simulation model in a simulated manner.

[0065] For example, Figure 3 is a schematic diagram of another new energy power station simulation system in the prior art. As Figure 3 The shown new energy power station simulation system includes a simulation machine 00 and multiple controllers 3. The simulation machine 00 is configured to simulate a power grid model 10, multiple power conversion models 20, and multiple new energy power generation device models 40, etc. Each controller 3 is connected to a corresponding power conversion model 20 in the simulation machine through an interface a provided by the simulation machine 00. For example, the controller 31 is connected to the power conversion model 201 in the simulation machine 00 through the interface a1 of the simulation machine 00, the controller 32 is connected to the power conversion model 202 in the simulation machine 00 through the interface a2 of the simulation machine 00, and so on. As Figure 3In the example shown, N controllers 3 are taken as an example, and the simulation machine 00 accordingly simulates N power conversion models 20 and new energy power generation equipment models 40, and each power conversion model 20 is connected to a corresponding new energy power generation equipment model 40. For example, the power conversion model 201 is connected to the new energy power generation equipment model 401, the power conversion model 202 is connected to the new energy power generation equipment model 402, and so on.

[0066] However, as Figure 3 shown in the new energy power station simulation system, the number of power conversion models 20 implemented by the simulation machine 00 is large, resulting in a large number of interfaces that the simulation machine 00 needs to provide, a complex simulated model, and a large amount of computing power required to implement the new energy power station simulation system.

[0067] Figure 4 A schematic diagram of another new energy power station simulation system in the prior art is shown. As Figure 4 shown in the new energy power station simulation system, the simulation machine 00 is connected to the power conversion model 20 and the grid model 10, and the power conversion model 20 is connected to the new energy power generation equipment model 40. Figure 3 In order to solve the problems in the prior art, the simulation machine 00 amplifies the current I AC of the alternating current AC provided by the power conversion model 20 to the grid model 10 through the current amplification model 50, so that the new energy power station simulation system only includes one controller 3 and the simulation machine 00 only includes one power conversion model 20, and the new energy power station in the prior art is simulated. Figure 3

[0068] Specifically, the current amplification model 50 is connected between the power conversion model 20 and the grid model 10. The current amplification model 50 can be used to receive the alternating current AC provided by the power conversion model 20, and after amplifying the current I AC of the alternating current AC by N times, the current amplification model 50 provides the amplified alternating current AC to the grid model 10, and the current of the amplified alternating current AC is N*I AC .

[0069] However, as Figure 4 shown in the new energy power station simulation system, the current amplification model 50 directly amplifies the current of the alternating current AC provided by the power conversion model 20, and when the amplification multiple N of the current of the alternating current AC is large, the voltage and current of the alternating current AC provided by the current amplification model 50 to the grid model 10 will oscillate in value, thereby reducing the simulation accuracy of the new energy power station simulation system.

[0070] In other prior art, as Figure 4 ​The simulation system of the new energy power plant shown includes a low-pass filter to filter out possible oscillations in the AC power supplied by the current amplification model 50 to the power grid model 10. However, this increases the structural complexity of the simulation system and reduces its simulation speed and accuracy.

[0071] In summary, addressing the technical problem of low simulation accuracy in existing new energy power plant simulation systems, this application provides a new energy power plant simulation system and method. In the new energy power plant simulation model, a parameter transmission model is connected between the power grid model and the power conversion model. Even when the power grid model and the power conversion model are not directly connected, voltage and current are transmitted through the parameter transmission model, thereby avoiding numerical oscillations in the voltage and current of the AC power supplied to the power grid model, and thus improving the simulation accuracy of the new energy power plant simulation system. The technical solution of this application will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0072] Figure 5 This is a schematic diagram of the structure of an embodiment of the new energy power plant simulation system provided in this application. Figure 5 The new energy power plant simulation system shown employs controller-in-the-loop (CIL) online simulation. The system includes a simulator (00) and a controller (3). The simulator (00) is used to simulate the new energy power plant model. Specifically, the simulator (00) can be an electronic device such as a computer, server, or workstation; for example, it could be an RT-LAB real-time simulator. Figure 5 In the example shown, the simulation model of the new energy power plant implemented by simulator 00 specifically includes a power grid model 10, a power conversion model 20, a new energy power generation equipment model 40, and a parameter transmission model 60. Among them, the power grid model 10 is connected to the power conversion model 20 through the parameter transmission model 60.

[0073] Controller 3 is connected to simulator 00 via interface a and is used to control power conversion model 20 in the new energy power plant simulation model. Since parameter transmission model 60 is set between power conversion model 20 and grid model 10, power conversion model 20 provides input current to grid model 10 through parameter transmission model 60.

[0074] The power grid model 10 can be used to provide voltage to the power conversion model 20. Since the power conversion model 20 is connected to the power grid model through the parameter transmission model 60, the power grid model 10 specifically provides input voltage to the power conversion model 20 through the parameter transmission model 60.

[0075] Let the output voltage of power grid model 10 be denoted as V. AC1. Then, parameter transfer model 60 can be used to measure the output voltage V of power grid model 10. AC The voltage value of 1, and the output voltage V according to the power grid model 10. AC The voltage value of 1 provides the input voltage to the power conversion model 20, and the input voltage of the power conversion model 20 is denoted as V. AC 2. Among them, the power conversion model 20 input voltage V AC The voltage value of 2 is equal to the output voltage V of grid model 10. AC The voltage value is 1. At this time, the power conversion model 20 receives the input voltage V provided by the parameter transfer model 60. AC 2, which is equivalent to the power conversion model 20 being connected to the power grid model 10 and receiving the output voltage V provided by the power grid model 10. AC 1.

[0076] The output current after the power conversion model 20 converts the DC power provided by the new energy power generation equipment model is denoted as I. AC 1. Then, parameter transfer model 60 can be used to measure the output current I of power conversion model 20. AC The current value of 1 is calculated, and the output current I is determined according to the measured power conversion model 20. AC The current value of 1 provides the input current to the power grid model 10, and the input current of the power grid model 10 is denoted as I. AC 2. The input current of power grid model 10 is denoted as I. AC 2. Input current I of power grid model 10 AC 2. The current value is the output current I of the power conversion model 20. AC The current is N times the value of 1, where N is a positive integer, for example, N = 50. At this time, the power grid model 10 receives the input current I from the parameter transmission model 60. AC 2, which is equivalent to the power grid model 10 receiving the input current jointly output by N parallel power conversion models 20. It can be understood that, due to the input current I of the power grid model 10... AC 2. The current value is the output current I of the power conversion model 20. AC The input power of grid model 10 is N times the current value of power conversion model 20, therefore the input power of grid model 10 is N times the output power of power conversion model 20.

[0077] Therefore, in the new energy power plant simulation model provided in this embodiment, by setting a parameter transmission model 60 between the power grid model 10 and the power conversion model 20 simulated by the simulator 00, voltage and current can be transmitted between the power grid model 10 and the power conversion model 20 even when the connection between the power grid model 10 and the power conversion model 20 is disconnected by the parameter transmission model 60, without the need for direct voltage and current transmission between the power grid model 10 and the power conversion model 20.

[0078] The parameter transmission model 60 can measure the voltage value of the grid model 10 output voltage V AC 1 and provide the input voltage V AC 2 to the power conversion model 20 according to the voltage value of the grid model 10 output voltage V AC 1. Since the voltage value of the grid model 10 output voltage V AC 1 is equal to the voltage value of the power conversion model 20 input voltage V AC 2, the parameter transmission model 60 can simulate the grid voltage when the power conversion model 20 is connected to the grid model 10 without direct connection between the grid model 10 and the power conversion model 20, thereby more realistically simulating the working condition of the power conversion model 20 under the grid voltage.

[0079] The parameter transmission model 60 can also collect the current value of the power conversion model 20 output current I AC 1 and multiply the current value of the power conversion model 20 output current I AC 1 to provide the input current I AC 2 to the grid model 10. The current value of the grid model 10 input current I AC 2 is N times the current value of the power conversion model 20 output current I AC 1. The parameter transmission model 60 can multiply the current value provided by the power conversion model 20 to the grid model 10 without direct connection between the grid model 10 and the power conversion model 20. Thus, in the case of only one controller 3 and one power conversion model 20 in the simulation machine 00, the new energy power station system including N power conversion models 20 can be simulated, and the complexity of the model to be simulated by the simulation machine 00 is reduced.

[0080] Further, in the new energy power station simulation system provided by the embodiment, the parameter transmission model 60 does not directly multiply the alternating current AC, but generates the input current I AC 2 of the grid model 10 according to the current value of the power conversion model 20 output current I AC 1, and the parameter transmission model 60 receives the power conversion model 20 output current I AC 1 and the grid model 10 input current I AC2 are different currents, and only the current values are multiplied. Therefore, even if the value N to be multiplied is large, the voltage and current provided by the parameter transmission model 60 to the power grid model 10 do not oscillate in value because the parameter transmission model 60 does not directly multiply the alternating current, thereby improving the simulation accuracy of the online simulation of the new energy power plant simulation system and making the values obtained by simulation more stable.

[0081] In addition, the new energy power plant simulation system provided by the embodiment has fewer requirements for the simulator 00 when implemented, does not need to change the impedance characteristics and other circuit parameters of the power conversion model 20 simulated by the simulator 00, does not need to modify the control parameters of the controller 3, and does not need to increase the number of interfaces of the simulator 00. Therefore, the new energy power plant simulation system provided by the embodiment has a simple structure and is easy to implement, so that the new energy power plant simulation system can be applied to more simulators 00 and is conducive to the use and promotion of the new energy power plant simulation system.

[0082] Figure 6 A structure diagram of another embodiment of the photovoltaic simulation system provided by the application is shown. Figure 6 As shown in the structure diagram of the photovoltaic simulation system shown in Figure 5 , a specific implementation of the parameter transmission model 60 is shown.

[0083] Specifically, as shown in the parameter transmission model 60 shown in Figure 6 , the parameter transmission model 60 includes a current measurement module 601, a processing module 600, a multiplication module 602, and a current source module 603 connected in sequence between the output end of the power conversion model 20 and the input end of the power grid model 10. Among them, the current measurement module 601 detects the current value of the output current I AC 1 of the power conversion model 20 and sends the current value of the output current I AC 1 of the power conversion model 20 to the processing module 600. The processing module 600 sends the current value of the output current I AC 1 of the power conversion model 20 to the multiplication module 602. The multiplication module 602 multiplies the received current value of the output current I AC 1 of the power conversion model 20 by N to obtain the current value of the input current I AC 2 of the power grid model 10 and sends the current value of the input current I AC 2 of the power grid model 10 to the current source module 603. The current source module 603 generates the input current I AC 2 of the power grid model 10 according to the current value of the input current I AC 2 of the power grid model 10 and inputs it to the power grid model 10.

[0084] As shown in the structure diagram of the photovoltaic simulation system shown in Figure 6The parameter transmission model 60 shown also includes a voltage measurement module 604 and a voltage source module 605. The voltage measurement module 604, processing module 600, and voltage source module 605 are sequentially connected between the output terminal of the power grid model 10 and the input terminal of the power conversion model 20. The voltage measurement module 604 measures the output voltage V of the power grid model 10. AC The voltage value of 1 is sent to the processing module 600. The processing module 600 outputs the voltage V from the power grid model 10. AC The voltage value of 1 is sent to the voltage source module 605. The voltage source module 605 outputs voltage V according to the power grid model 10. AC 1. Voltage value generation power conversion model 20 Input voltage V AC 2, and input into the power transformation model 20.

[0085] Figure 7 This is a schematic diagram of the output current of the power conversion model in the new energy power plant simulation system provided in this application. Figure 8 This is a schematic diagram of the input current of the power grid model in the new energy power plant simulation system provided in this application, combined with... Figure 7 and Figure 8 It can be seen that the output current I of power conversion model 20 AC The maximum current value of I is 4.65A. After being multiplied by the multiplier module 602, the current source module 603 outputs the current I to the power grid model 10. AC The maximum current value of 2 is 235.5A. Figure 9 A detailed schematic diagram of the input current for the power grid model provided in this application is shown. Figure 8 Input current I of power grid model 10 between time 105.855 and time 105.875 AC The current variation in model 2, where the input current I in grid model 10 is... AC The carrier of 2 is the three-phase AC power supplied by the current source module 603 to the power grid model 10.

[0086] Figure 10 This is a schematic diagram of the output power of the power conversion model in the new energy power plant simulation system provided in this application. Figure 11 This is a schematic diagram of the input power of the power grid model in the new energy power plant simulation system provided in this application, combined with... Figure 10 and Figure 11 It can be seen that the maximum output power of power conversion model 20 is 185kW. After multiplication by the multiplier module 602, the maximum input power of grid model 10 is 9250kW. Combined with... Figures 7-11 It can be seen that in the new energy power station simulation system, the current value and power value after being processed by the multiplication module 602 are multiplied by N times, and the multiplication value is relatively accurate and the current waveform after multiplication is undistorted.

[0087] Figure 12 The new energy power station simulation model provided in the application is an impedance scan amplitude comparison chart before and after the current is multiplied, wherein the curve L1 shows the impedance scan amplitude of the output end of the power conversion model 20 at the frequency of 0-1000 Hz (i.e. the impedance scan amplitude of the power conversion model 20), the curve L2 shows the impedance scan amplitude of the input end of the power grid model 10 at the frequency of 0-1000 Hz (i.e. the impedance scan amplitude of the power conversion model 20 after the current is multiplied), and the curve L3 is the impedance scan amplitude of the output end of the theoretically parallel-connected N power conversion models 20 at the frequency of 0-1000 Hz. It can be seen that the curve L2 and the curve L3 are almost coincident, only with slight difference, so that the impedance scan amplitude of the current after the multiplication processing of the parameter transmission module 60 is consistent with the theoretical value, so that the new energy power station simulation system provided in the application has high simulation accuracy.

[0088] Figure 13 The new energy power station simulation model provided in the application is an impedance scan phase comparison chart before and after the current is multiplied, wherein the curve L4 shows the impedance scan phase of the output end of the power conversion model 20 at the frequency of 0-1000 Hz (i.e. the impedance scan phase of the power conversion model 20), and the curve L5 shows the impedance scan phase of the input end of the power grid model 10 at the frequency of 0-1000 Hz (i.e. the impedance scan phase of the power conversion model 20 after the current is multiplied). It can be seen that the curve L4 and the curve L5 are almost coincident, only with slight difference, so that the impedance scan phase after the processing of the parameter transmission module 60 is consistent with the theoretical value, without changing the impedance phase characteristics of the model, so that the new energy power station simulation system provided in the application has high simulation accuracy.

[0089] In summary, in the new energy power station simulation system applied to online simulation provided in the embodiment, the parameter transmission model 60 measures the output voltage V AC 1, the voltage source module 605 generates the input voltage V AC 2 of the power conversion model, the current measurement module 601 measures the output current I AC 1 of the power conversion model 20, and the current source module 603 generates the input current I AC 2 of the power conversion model. Therefore, the parameter transmission model 60 provided in the embodiment disconnects the connection between the power grid model 10 and the power conversion model 20 in a relatively simple and effective manner, so that the transmission of voltage and current can be realized without direct transmission of alternating current between the power grid model 10 and the power conversion model 20, so that the structure of the parameter transmission model 60 and the new energy power station simulation system in which the parameter transmission model 60 is located is relatively simple, and meanwhile, the simulation system has high simulation accuracy.

[0090] In an embodiment, as shown in the simulation machine 00, a central processing unit (CPU) simulation unit 001 and a Field Programmable Gate Array (FPGA) simulation unit 002 are running. Figure 6 The CPU simulation unit 001 can also be referred to as a CPU core model, and the FPGA simulation unit 002 can also be referred to as an FPGA core model.

[0091] In an embodiment, the CPU simulation unit 001 is used to simulate the power grid model 10, the processing module 600, the voltage measurement module 604, the current source module 603, and the multiplication module 602.

[0092] In an embodiment, the FPGA simulation unit 002 is used to simulate the power conversion model 20, the voltage source module 605, and the current measurement module 601.

[0093] In an embodiment, the processing module 600 implemented in the CPU simulation unit 001 can be an electric hardware solver (eHS) module. The eHS module can be used to implement the interaction of data between the CPU simulation unit 001 and the FPGA simulation unit 002. In this embodiment, the current measurement module 601 transmits the current value of the power conversion model 20 output current I AC 1 to the multiplication module 602 through the eHS module, and the voltage measurement module 604 transmits the voltage value of the power grid model 10 output voltage V AC 1 to the voltage source module 605 through the eHS module.

[0094] In an embodiment, as shown in the new energy power plant simulation model, Figure 6 After each model and module in the new energy power plant simulation model is loaded into the corresponding CPU simulation unit 001 and FPGA simulation unit 002 for calculation, the simulation of the new energy power plant simulation model can be realized.

[0095] In summary, the new energy power plant simulation system provided in this embodiment realizes simulation of corresponding modules and models through the CPU simulation unit 001 and the FPGA simulation unit 002, respectively, so as to ensure that each module and model is implemented in the corresponding simulation unit, ensure the normal implementation of the simulation, and improve the stability of the simulation.

[0096] In an embodiment, the power conversion model 20 can be used to measure the data such as the voltage received from the parameter transmission module 60 and the output current, and generate a data signal AO for representing the working state of the power conversion model. The power conversion model 20 sends the data signal AO to the controller 3 through the interface a of the simulation machine 00.

[0097] In one embodiment, the controller 3 can generate a control signal DI based on the received data signal AO, and send the control signal DI to the power conversion model 20 through interface a of the simulator 00. The control signal can be used to control the operating state of the power conversion model 20, for example, controlling the power conversion model 20 to generate an output current I based on the DC power provided by the new energy power generation equipment model 40. AC 1.

[0098] In the foregoing embodiments of this application, the online simulation implementation of controller-in-the-loop (CIL) is used as an example to illustrate the simulation system and method for new energy power plants. The new energy power plant simulation model provided in this application can also be applied to offline simulations, as described below with reference to the accompanying drawings.

[0099] Figure 14 A schematic diagram of a simulation model of a new energy power plant provided in this application, as shown below. Figure 14 The simulation model of the new energy power plant shown includes: a power grid model 10, a power conversion model 20, a parameter transmission model 60, a new energy power generation equipment model 40, and a controller model 30. For details on the specific connection methods and working principles of the power grid model 10, power conversion model 20, parameter transmission model 60, and new energy power generation equipment model 40 in the simulation model, please refer to... Figure 5 The example shown will not be repeated in this embodiment.

[0100] like Figure 14 When the simulator 00 shown performs offline simulation of the new energy power plant simulation system, the connection between the power grid model 10 and the power conversion model 20 is disconnected by the parameter transfer model 60 in the new energy power plant simulation model. Thus, the parameter transfer model 60 transmits voltage and current parameters between the power grid model 10 and the power conversion model 20, replacing the direct AC power transmission between the two models. Since the parameter transfer model 60 does not directly multiply the AC power, but rather calculates the output current I of the power conversion model 20... AC After multiplying the current value of 1, we get the input current I of the power grid model 10 after multiplication. AC 2. Only the current value is multiplied. Therefore, even if the multiplied value N is large, since the AC current is not directly multiplied, the current ultimately provided by the parameter transmission model 60 to the power grid model 10 will not exhibit numerical oscillations. This improves the simulation accuracy of offline simulation of the real system of the photovoltaic power plant and makes the simulation values ​​more stable.

[0101] In one embodiment, Figure 15 This is a schematic diagram of another new energy power plant simulation model provided in this application. (See attached diagram.)Figure 15 The new energy power station simulation model shown in Figure 14 The parameter transmission model 60 is shown in one specific implementation manner.

[0102] Specifically, as Figure 15 The parameter transmission model 60 includes: a current measurement module 601, a multiplication module 602 and a current source module 603 connected in sequence between the output end of the power conversion model 20 and the input end of the grid model 10, and a voltage measurement module 604 and a voltage source module 605 connected between the output end of the grid model 10 and the input end of the power conversion model 20.

[0103] The current measurement module 601 measures the current value of the output current I AC 1 of the power conversion model 20 and sends it to the multiplication module 602. The multiplication module 602 multiplies the received current value of the output current I AC 1 of the power conversion model 20 by N to obtain the current value of the input current I AC 2 of the grid model 10, and sends the current value of the input current I AC 2 of the grid model 10 to the current source module 603. The current source module 603 generates the input current I AC 2 of the grid model 10 according to the current value of the input current I AC 2 of the grid model 10 and inputs it to the grid model 10.

[0104] The voltage measurement module 604 measures the voltage value of the output voltage V AC 1 of the grid model 10 and sends it to the voltage source module 605. The voltage source module 605 generates the input voltage V AC 2 of the power conversion model 20 according to the voltage value of the output voltage V AC 1 of the grid model 10 and inputs it to the power conversion model 20.

[0105] In summary, the parameter transmission model 60 measures the output voltage V AC 1 of the grid model 10 through the voltage measurement module 604, the voltage source module 605 generates the input voltage V AC 2 of the power conversion model, the current measurement module 601 measures the output current I AC 1 of the power conversion model 20, and the current source module 603 generates the input current I AC2. Therefore, the parameter transmission model 60 provided in this embodiment disconnects the connection between the power grid model 10 and the power conversion model 20 in a relatively simple and effective way, so that voltage and current can be transmitted even when the power grid model 10 and the power conversion model 20 do not directly transmit AC power. This makes the structure of the parameter transmission model 60 and the new energy power station simulation system it belongs to relatively simple, while also having high simulation accuracy.

[0106] This application also provides a simulation method for new energy power plants, which can be applied to the aforementioned methods described in this application. Figure 5 The provided new energy power plant simulation system is executed by simulator 00. For example, Figure 16 This is a flowchart illustrating an embodiment of the new energy power plant simulation method provided in this application, as shown below. Figure 16 The simulation methods for new energy power plants shown include:

[0107] S101: Measure the output voltage V of power grid model 10 AC 1.

[0108] S102: Provide input voltage V to power conversion model 20 through parameter transfer model. AC 2.

[0109] S103: Measure the output current I of power conversion model 20 AC 1.

[0110] S104: Input current I is provided to the power grid model 10 through parameter transfer model 60. AC 2.

[0111] In one embodiment, when as Figure 16 The simulation method for new energy power plants shown is applied in, for example... Figure 6 The simulation method for new energy power plants in the illustrated new energy power plant simulation system specifically includes:

[0112] S101: Measure the output voltage V of the power grid model 10 using the voltage measurement module 604. AC 1.

[0113] S102: The input voltage V of the power conversion model 20 is generated through the voltage source module 605. AC 2, and input into the power conversion model 20.

[0114] S103: Measure the output current I of the power conversion model 20 using the current measurement module 601. AC 1.

[0115] S104: Output current I of power conversion model 20 is multiplied by multiplier module 602. AC Multiplying the current value of 1 by N yields the power grid model 10, which provides the input current I.AC 2, the input current I is generated by the current source module 603 and provided to the power grid model 10. AC 2, and input to the power grid model 10.

[0116] In an embodiment, when the new energy power station simulation method as shown in Figure 16 is applied in the new energy power station simulation system as shown in Figure 5 , the new energy power station simulation method further comprises: sending a data signal AO to the controller 3 through the power conversion model 20, and / or sending a control signal DI to the power conversion model 20 through the controller 3. Wherein, after receiving the data signal AO, the controller 3 can adjust the control signal DI according to the data signal AO, to realize closed-loop feedback control of the power conversion model 20. Alternatively, the controller 3 can further analyze the power conversion model 20 according to the data signal AO to obtain the simulation result of the power conversion model 20. Alternatively, the controller 3 can also store the data signal AO, and further analyze the data signal AO stored by the controller 3 by other devices or personnel, etc.

[0117] In an embodiment, when the new energy power station simulation method as shown in Figure 16 is applied in the new energy power station simulation system as shown in Figure 14 or 15, the new energy power station simulation method further comprises: sending a data signal AO to the controller model 30 through the power conversion model 20, and / or sending a control signal DI to the power conversion model 20 through the controller model 30. Wherein, after receiving the data signal AO, the controller model 30 can adjust the control signal DI according to the data signal AO, to realize closed-loop feedback control of the power conversion model 20. Alternatively, the controller model 30 can further analyze the power conversion model 20 according to the data signal AO to obtain the simulation result of the power conversion model 20. Alternatively, the controller model 30 can also store the data signal AO, and further analyze the data signal AO stored by the controller model 30 by other devices or personnel, etc.

[0118] In addition, it should be noted that the application embodiments in this application take the scenario of being applied in new energy power stations as an example, and it can be understood that the application embodiments can also be applied in other fields involving power supply system simulation scenarios. For example, railway power system simulation, large ship power system simulation, etc. In these simulations, the power conversion module can be used to realize output power to the whole vehicle or the whole ship.

[0119] In the foregoing embodiments, the new energy power station simulation method executed by the simulation machine provided in the embodiments of the present application is introduced. In order to implement each function in the new energy power station simulation method provided in the embodiments of the present application, the simulation machine as a main body to execute the method can include a hardware structure and / or a software module to implement each function in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function in each function is implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on specific application of the technical solution and design constraint conditions.

[0120] It should be noted that the division of each module above is only a logical function division, and all or part of the modules can be integrated into one physical entity or physically separated during actual implementation. The modules can all be implemented in the form of software called by a processing element, all be implemented in the form of hardware, or part of the modules be implemented in the form of software called by a processing element and part of the modules be implemented in the form of hardware. For example, the processing module can be a separately established processing element or be integrated in a semiconductor of the device, and in addition, the processing module can be in the form of program code stored in a memory of the device and called and executed by a processing element of the device to implement the functions of the above determination module. The implementation of other modules is similar. In addition, all or part of the modules can be integrated together or independently implemented. The processing element described herein can be an integrated circuit having a signal processing capability. During implementation, each step of the method or each module above can be completed by an integrated logic circuit of hardware in the processor element or an instruction in the form of software.

[0121] For example, the modules above can be one or more integrated circuits configured to implement the method above, such as one or more application specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), etc. For another example, when a certain module above is implemented in the form of program code called by a processing element, the processing element can be a general-purpose processor such as a central processing unit (CPU) or other processor capable of calling program code. For another example, the modules can be integrated together to implement in the form of a system on a chip (SOC).

[0122] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0123] Figure 17 This is a schematic diagram of an embodiment of the electronic device provided in this application. This electronic device can be used to execute any of the new energy power generation equipment simulation methods executed by a simulator as described in the foregoing embodiments of this application. Figure 17 The illustrated electronic device 200 includes at least one processor 2001 and a memory 2002; wherein the memory 2002 stores computer instructions, and the at least one processor 2001 can execute the computer instructions. When the processor 2001 executes the computer instructions, the processor 2001 can be used to execute any of the new energy power generation equipment simulation methods executed by a simulator in the foregoing embodiments of this application. In one embodiment, the processor 2001 can communicate via a communication interface 2003, for example, receiving data signals AO and sending control signals DI.

[0124] This application also provides a computer-readable storage medium storing computer instructions. When a processor executes the computer instructions, the processor can be used to execute any of the new energy power generation equipment simulation methods executed by a simulator as described in the foregoing embodiments of this application.

[0125] This application also provides a semiconductor for executing instructions, the semiconductor being used to execute any of the new energy power generation equipment simulation methods executed by a simulator as described above.

[0126] The embodiment of the present application further provides a computer program product, the computer program product comprising a computer program stored in a storage medium, at least one processor can read the computer program from the storage medium, and the at least one processor executes the computer program to realize the steps of the new energy power generation equipment simulation method executed by the simulation machine according to any one of the foregoing embodiments of the present application.

[0127] Those skilled in the art can understand that all or part of the steps of the foregoing method embodiments can be completed by program instruction related hardware. The foregoing program can be stored in a computer readable storage medium. The program executes to perform the steps of the foregoing method embodiments; and the foregoing storage medium includes various storage media that can store program codes, such as ROM, RAM, magnetic disk or optical disk.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A new energy power plant simulation system, characterized in that, The system includes a simulation model for a new energy power plant, which comprises a power grid model, a power conversion model, and a parameter transmission model. The power grid model is connected to the power conversion model through the parameter transmission model. The parameter transfer model provides an input voltage to the power conversion model based on the output voltage of the power grid model, wherein the voltage value of the input voltage of the power conversion model is equal to the voltage value of the output voltage of the power grid model; The parameter transmission model provides an input current to the power grid model based on the output current of the power conversion model. The current value of the input current of the power grid model is equal to N times the current value of the output current of the power conversion model, where N is a positive integer. The parameter transmission model includes: a current measurement module, a multiplier module, and a current source module connected sequentially between the output end of the power conversion model and the input end of the power grid model; The current measurement module measures the output current of the power conversion model; The multiplier module multiplies the output current value of the power conversion model by N to obtain the input current value of the power grid model. The current source module generates the power grid model input current based on the current value of the power grid model input current, and inputs it into the power grid model; The parameter transmission model further includes: a voltage measurement module and a voltage source module connected sequentially between the output end of the power grid model and the input end of the power conversion model; The voltage measurement module measures the output voltage of the power grid model; The voltage source module generates the input voltage of the power conversion model based on the output voltage value of the power grid model, and inputs it into the power conversion model.

2. The new energy power plant simulation system according to claim 1, characterized in that, Also includes: The controller connected to the simulation model of the new energy power plant; The controller sends a control signal to the power conversion model, and the control signal is used to control the output current of the power conversion model. And / or, the power conversion model sends a data signal to the controller, the data signal being used to characterize the operating state of the power conversion model.

3. The new energy power plant simulation system according to claim 2, characterized in that, The new energy power plant simulation model also includes a processing module connected between the current measurement module and the multiplication module, and the processing module is also connected between the voltage measurement module and the voltage source module; The current measurement module transmits the current value of the power conversion model output current to the multiplication module through the processing module; The voltage measurement module transmits the voltage value of the power grid model output voltage to the voltage source module through the processing module.

4. The new energy power plant simulation system according to claim 3, characterized in that... ； The power grid model, the processing module, the voltage measurement module, the current source module, and the multiplier module are simulated by the CPU simulation unit of the simulator; The power conversion model, voltage source module, and current detection module are simulated by the FPGA simulation unit of the simulator.

5. The new energy power plant simulation system according to claim 1, characterized in that, The new energy power plant simulation model also includes: a controller model connected to the power conversion model; The controller model sends a control signal to the power conversion model, and the control signal is used to control the output current of the power conversion model. And / or, the power conversion model sends a data signal to the controller model, the data signal being used to characterize the operating state of the power conversion model.

6. The new energy power plant simulation system according to any one of claims 1-5, characterized in that, The new energy power plant simulation model also includes: a new energy power generation equipment model connected to the power conversion model; The new energy power generation equipment model provides DC power to the power conversion model; The power conversion model converts the DC power provided by the new energy power generation equipment into AC power, resulting in the output current of the power conversion model.

7. The new energy power plant simulation system according to claim 6, characterized in that, The new energy power generation equipment model includes at least one of the following: photovoltaic power generation equipment model, wind power generation equipment model, and diesel power generation equipment model.

8. The new energy power plant simulation system according to any one of claims 1-7, characterized in that, The power conversion model includes either a photovoltaic inverter model or an energy storage converter model.

9. The new energy power plant simulation system according to any one of claims 1-8, characterized in that, The power grid model includes: a power system model, a microgrid model, or a voltage source model.

10. A simulation method for a new energy power plant, characterized in that, An application is made in a new energy power plant simulation system, which includes a new energy power plant simulation model. The simulation model comprises a power grid model, a power conversion model, and a parameter transmission model. The power grid model is connected to the power conversion model through the parameter transmission model. The new energy power plant simulation method includes: Measure the output voltage of the power grid model; The parameter transfer model provides an input voltage to the power conversion model, and the voltage value of the input voltage of the power conversion model is equal to the voltage value of the output voltage of the power grid model. Measure the output current of the power conversion model; The parameter transmission model provides an input current to the power grid model, and the current value of the input current to the power grid model is equal to N times the current value of the output current of the power conversion model, where N is a positive integer. The parameter transmission model includes: a current measurement module, a multiplier module, and a current source module connected sequentially between the output end of the power conversion model and the input end of the power grid model; The measurement of the output current of the power conversion model includes: The output current of the power conversion model is measured using the current measurement module. Providing input current to the power grid model through the parameter transfer model includes: The current value of the power grid model input current is obtained by multiplying the current value of the output current of the power conversion model by N through the multiplication module. The current source module generates the input current for the power grid model and inputs it into the power grid model. The parameter transmission model further includes: a voltage measurement module and a voltage source module connected sequentially between the output end of the power grid model and the input end of the power conversion model; The measurement of the output voltage provided by the power grid model includes: The voltage measurement module measures the output voltage of the power grid model. Providing input voltage to the power conversion model through the parameter transfer model includes: The current source module generates the input voltage for the power conversion model and inputs it into the power conversion model.

11. The new energy power plant simulation method according to claim 10, characterized in that, The new energy power plant simulation system also includes a controller connected to the new energy power plant simulation model, and the new energy power plant simulation method further includes: The controller sends a control signal to the power conversion model, and the control signal is used to control the output current of the power conversion model. And / or, send data signals to the controller through the power conversion model, the data signals being used to characterize the operating state of the power conversion model.

12. The new energy power plant simulation method according to claim 11, characterized in that, The new energy power plant simulation model further includes a processing module connected between the current measurement module and the multiplication module, and the processing module is also connected between the voltage measurement module and the voltage source module. The new energy power plant simulation method further includes: The processing module transmits the current value of the output current of the power conversion model to the multiplication module. The processing module transmits the voltage value of the power grid model output voltage to the voltage source module.

13. The new energy power plant simulation method according to claim 10, characterized in that, The new energy power plant simulation model further includes: a controller model connected to the power conversion model; the new energy power plant simulation method further includes: The controller model sends a control signal to the power conversion model, and the control signal is used to control the output current of the power conversion model. And / or, send data signals to the controller model through the power conversion model, the data signals being used to characterize the operating state of the power conversion model.

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