Wind power plant full-link simulation system and simulation method

Abstract

The invention provides a wind power plant full-link simulation system and simulation method. The simulation system comprises a power grid simulation module, a control module, an electrical simulation module, a mechanical simulation module, a pneumatic simulation module, a flow field simulation module and the like. The power grid simulation module is used for performing power dispatching simulation and generating a dispatching instruction; the control module is used for receiving the dispatching instruction and generating a control instruction of the wind power plant; the flow field simulation module is used for calculating flow field data of the wind power plant; the pneumatic simulation module is used for generating a control signal of the fan according to the control instruction; the mechanical simulation module is used for realizing fan mechanical part simulation according to the flow field data and the control signal; and the electrical simulation module is used for realizing fan electrical part simulation according to the control signal. By means of the simulation system, simulation of a flow field-pneumatic-mechanical-electrical-control-power grid full link is achieved, and multi-temporal-spatial-scale dynamic coupling characteristics of a complex flow field and a unit of a wind power plant, power grids inside and outside the wind power plant and control can be reflected.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation modeling, and in particular relates to a wind farm full-link simulation system and simulation method. Background Art

[0002] With the transformation of the global energy structure, wind power, as an important component of clean and renewable energy, is developing at an increasingly rapid pace. Thanks to the continuous advancement of wind power technology and the effective reduction of costs, wind power has become one of the key elements in the energy systems of many countries. In the process of promoting the development of the wind power industry, the construction and operation of large-scale wind farms have become a new focus. However, this process is accompanied by a series of technical challenges, which are not only related to the efficient operation of the wind farm itself, but also directly affect the overall performance of the power system.

[0003] In the existing construction and operation of wind farms, the following technical difficulties are faced: First, large-scale wind power access to the grid may cause grid stability problems, because the discontinuity and unpredictability of wind power can easily lead to fluctuations in grid frequency and voltage; second, the wake effect between wind turbines inside the wind farm is significant, which will cause the downwind wind turbines to receive lower wind speeds, thereby affecting the power generation efficiency of the entire wind farm; finally, the coordination mechanism between the wind farm and the external grid is not yet perfect, which involves aspects such as the power prediction accuracy, frequency regulation capability and voltage control level of the wind farm. In response to the above problems, current research usually relies on simulation models in specific fields, such as multi-body dynamics analysis of aerodynamic-mechanical coupling, aerodynamic-mechanical-electrical modeling of unit control, and dynamic or static simulation of wind power grid connection. However, these models often only cover a limited simulation range and lack the ability to fully describe the complex environment of wind farms, especially for dynamic interaction processes on multiple spatiotemporal scales. It is difficult to accurately simulate. Therefore, it is urgent to develop a wind farm simulation system that can cover the full-link characteristics from flow field to grid to meet deeper research needs and technical practices. Summary of the invention

[0004] In view of this, the present invention provides a full-link simulation system and simulation method for a wind farm. Through the full-link simulation of flow field-pneumatic-mechanical-electrical-control-grid, it can reflect the multi-time and space scale dynamic coupling characteristics of the complex flow field and units, internal and external power grids and controls of the wind farm, so as to solve the above-mentioned problems existing in the existing simulation models.

[0005] In order to achieve the above object, the technical solution provided by the present invention is as follows:

[0006] In a first aspect, the present invention provides a wind farm full-link simulation system, characterized in that it includes:

[0007] Power grid simulation module, control module, electrical simulation module, mechanical simulation module, pneumatic simulation module and flow field simulation module;

[0008] The power grid simulation module runs based on the pre-established wind farm-grid simulation model and is used to simulate power dispatch and generate dispatch instructions;

[0009] The control module is used to receive the dispatching instructions and generate the control instructions of the wind farm;

[0010] The flow field simulation module is used to calculate the flow field data of the wind farm;

[0011] The pneumatic simulation module is used to generate the control signal of the fan according to the control instruction;

[0012] The mechanical simulation module runs based on the mechanical part model of the fan and is used to simulate the mechanical part of the fan according to the flow field data and control signals;

[0013] The electrical simulation module runs based on the wind turbine electrical part model and is used to realize the wind turbine electrical part simulation according to the control signal; the wind turbine mechanical part model and the wind turbine electrical part model are both sub-models of the wind farm simulation model in the wind farm-grid simulation model.

[0014] Furthermore, the power grid simulation module includes: a power grid dispatch simulation system and a wind farm-power grid simulation model;

[0015] The wind farm-grid simulation model includes a detailed grid model and a wind farm cluster model;

[0016] The wind farm cluster model is used to simulate the wind farm cluster;

[0017] The detailed grid model is used to simulate the grid to which the wind farm group is connected;

[0018] The power grid dispatch simulation system is used to simulate power dispatch based on the detailed power grid model and wind farm cluster model, and generate dispatch instructions.

[0019] Further, the control module includes: a wind farm control system;

[0020] The wind farm control system is used to receive dispatching instructions and yaw angle data of wind turbines in the wind farm, and generate field-level control instructions as control instructions to realize wind farm-level control simulation.

[0021] Furthermore, the control module includes: a group control device and a wind farm control system;

[0022] The group control device is used to achieve coordination between wind farms and power grids during power dispatching and generate dispatching control instructions for each wind farm according to the dispatching instructions, so as to achieve multi-objective cluster control of wind farm groups;

[0023] The wind farm control system is used to receive dispatching control instructions and yaw angle data of wind turbines in the wind farm, and generate field-level control instructions as control instructions to realize wind farm-level control simulation.

[0024] Further, it also includes: a wind farm monitoring system;

[0025] The wind farm monitoring system is used to obtain the electrical quantity data of the wind farm group and send it to the control module.

[0026] Furthermore, the electrical quantity data at least includes: active power, reactive power and node voltages of each wind turbine in the wind farm.

[0027] Further, the flow field simulation module includes: a wake simulation link library operation device;

[0028] The wake simulation link library operation device is used to calculate the inflow wind speed of each wind turbine in the wind farm according to the inflow wind speed data of the farm group, and to apply the inflow wind speed to the mechanical part model of the wind turbine.

[0029] Further, the pneumatic simulation module includes: a fan master control link library operating device and a fan converter control link library operating device;

[0030] The wind turbine master control link library operation device is used to send the yaw angle data of the wind turbine to the control module and receive the control command from the control module; it is also used to generate yaw and pitch angle commands as control signals and generate power commands according to the control command and the yaw angle and pitch angle data of the wind turbine mechanical part model;

[0031] The wind turbine converter control link library operation device is used to generate a control pulse signal of the wind turbine converter according to the power instruction and the electrical quantity data of the wind turbine electrical part model.

[0032] Furthermore, it also includes: an information interaction module;

[0033] The information interaction module includes 104 protocol, Modbus communication protocol and optical fiber communication;

[0034] 104 protocol and Modbus communication protocol are used to realize data communication within the wind farm and between the wind farm and the power grid;

[0035] Optical fiber communication is used to realize data transmission between the wind turbine model and various simulation modules.

[0036] In a second aspect, the present invention provides a wind farm full-link simulation method, which is implemented based on the wind farm full-link simulation system of the first aspect, and includes the following steps:

[0037] Generate dispatching instructions through the power grid dispatching simulation system;

[0038] receiving the dispatching instruction and generating the control instruction through the control device;

[0039] Calculate the flow field data of the wind farm through the flow field simulation module;

[0040] Receive control instructions and generate control signals through the pneumatic simulation module;

[0041] The mechanical simulation module receives control signals and flow field data and executes them to simulate the mechanical part of the fan;

[0042] The control signal is received and executed through the electrical simulation module to realize the simulation of the electrical part of the fan.

[0043] In summary, the present invention provides a full-link simulation system for a wind farm, which includes a power grid simulation module, a control module, an electrical simulation module, a mechanical simulation module, an aerodynamic simulation module and a flow field simulation module; the power grid simulation module runs based on a pre-established wind farm-grid simulation model, and is used to simulate power dispatching and generate dispatching instructions; the control module is used to receive dispatching instructions and generate control instructions for the wind farm; the flow field simulation module is used to calculate the flow field data of the wind farm; the aerodynamic simulation module is used to generate a control signal for the wind turbine according to the control instruction; the mechanical simulation module runs based on the mechanical part model of the wind turbine, and is used to simulate the mechanical part of the wind turbine according to the flow field data and the control signal; the electrical simulation module runs based on the electrical part model of the wind turbine, and is used to simulate the electrical part of the wind turbine according to the control signal; the mechanical part model of the wind turbine and the electrical part model of the wind turbine are both sub-models of the wind farm simulation model in the wind farm-grid simulation model. Through the simulation system, the present invention realizes the simulation of the full link of flow field-pneumatic-mechanical-electrical-control-grid, and can reflect the multi-temporal and spatial scale dynamic coupling characteristics of the complex flow field of the wind farm and the units, the grid inside and outside the field, and the control.

[0044] The present invention also provides a wind farm full-link simulation method, which has the same effect as the above-mentioned simulation system when implemented, and will not be described in detail here. 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 work.

[0046] Figure 1 A block diagram of a wind farm full-link simulation system provided by an embodiment of the present invention;

[0047] Figure 2A framework diagram of a wind farm network full-link simulation system based on a group control device provided in an embodiment of the present invention;

[0048] Figure 3 A framework diagram of a wind farm network full-link simulation system that does not include a group control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0049] 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.

[0050] The following first introduces the existing technologies related to existing wind farm simulation.

[0051] As mentioned above, the integrated gas-machine-electricity-control-grid system of a wind farm has the characteristics of multidisciplinary coupling, high complexity, multiple spatiotemporal dimensions, and strong nonlinearity. However, the models currently used in research are mostly local cross-domain simulation models, such as multi-body dynamics models of gas-dynamic coupling, gas-machine-electricity models of unit control, and transient or steady-state models of wind power grid connection. None of them can reflect the complex flow field of a wind farm and the multi-spatial-temporal scale dynamic coupling characteristics of units, internal and external power grids, and controls.

[0052] The multi-body dynamics model of aerodynamic coupling mainly focuses on the local characteristics of a single wind turbine and is difficult to expand to the complex flow field and wake effect of the entire wind farm. The aerodynamic-mechanical-electrical model of unit control mainly focuses on the control of a single wind turbine and lacks consideration of the global control strategy of the entire wind farm and power grid. The transient or steady-state model of wind power grid connection is mainly concentrated at the power grid level and lacks detailed simulation of the flow field, aerodynamic, mechanical and control characteristics inside the wind farm.

[0053] Based on this, the present invention provides a wind farm full-link simulation system and simulation method. The following is a detailed introduction to an embodiment of a wind farm full-link simulation system of the present invention.

[0054] See also Figure 1 An embodiment of the present invention provides a full-link simulation system for a wind farm, characterized in that it includes: a power grid simulation module, a control module, an electrical simulation module, a mechanical simulation module, a pneumatic simulation module and a flow field simulation module.

[0055] In this embodiment, the power grid simulation module simulates the power dispatching process between the wind farm and the power grid based on the pre-established wind farm-power grid simulation model, and generates dispatching instructions to guide the operation of the wind farm, ensure the stable output of wind power, and monitor the frequency and voltage status of the power grid to prevent potential stability problems. With such a setting, accurate power grid simulation can be achieved through this module, which can detect and solve factors that may affect the stability of the power grid in advance, and improve the reliability and security of the power grid.

[0056] The control module is used to receive the dispatching instructions generated by the power grid simulation module and convert them into specific wind farm control instructions. It realizes the precise control of the internal equipment of the wind farm (such as wind turbines) to ensure that the wind farm can efficiently respond to the dispatching needs of the power grid. With such settings, the control strategy of the wind farm can be optimized through this module, the flexibility and response speed of the wind farm can be improved, and the coordination ability with the power grid can be enhanced.

[0057] The flow field simulation module is used to simulate the changes in wind speed, wind direction and other parameters in the natural environment of the wind farm, providing basic data for subsequent aerodynamic simulation. With this setting, through accurate flow field simulation, the layout of wind turbines can be optimized, the impact of wake effect on downstream wind turbines can be reduced, and the overall power generation efficiency of the wind farm can be improved.

[0058] The aerodynamic simulation module is used to simulate the aerodynamic behavior of the fan blades under different working conditions according to the control signals generated by the control module. With this setting, through aerodynamic simulation, we can better understand the performance of the fan under different wind speed conditions, optimize the fan control strategy, and improve the power generation efficiency.

[0059] The mechanical simulation module runs based on the model of the mechanical part of the fan. It is used to simulate the working status of the mechanical components of the fan, including the rotor, gearbox, etc., according to the flow field data and control signals.

[0060] The electrical simulation module runs based on the wind turbine electrical part model and is used to simulate the behavior of the wind turbine electrical system according to the control signal, such as the generator output power, converter working status, etc. The wind turbine mechanical part model and the wind turbine electrical part model are both sub-models of the wind farm simulation model in the wind farm-grid simulation model.

[0061] The wind farm full-link simulation system provided in this embodiment realizes the full-process simulation from flow field simulation to grid access by organically combining the above modules. This full-link simulation can fully reflect the multi-time and space scale dynamic coupling characteristics of the complex flow field and units, on-site and off-site grids and controls of the wind farm, providing strong technical support for the design, construction, operation, maintenance and optimization of the wind farm.

[0062] See also Figure 2 and 3 , Figure 2 and 3A wind farm network full-link simulation system framework is proposed according to the above embodiment, wherein Figure 2 This is a framework diagram of the full-link simulation system of a wind farm network based on a group control device; Figure 3 This is a full-link simulation system framework diagram of a wind farm network without group control devices. Figure 2 and 3 Other embodiments of the present invention are described.

[0063] In one embodiment, the power grid simulation module includes: a power grid dispatching simulation system and a wind farm-power grid simulation model; the wind farm-power grid simulation model includes a power grid detailed model and a wind farm cluster model; the wind farm cluster model is used to simulate the wind farm cluster; the power grid detailed model is used to simulate the power grid to which the wind farm cluster is connected; the power grid dispatching simulation system is used to perform power dispatching simulation based on the power grid detailed model and the wind farm cluster model, and generate dispatching instructions.

[0064] In this embodiment, the power grid dispatch simulation system is a system for simulating the power dispatch process, which can generate and send power grid dispatch instructions to the control module. Its function is to ensure the stable operation of the power grid, optimize power distribution, and improve energy utilization efficiency.

[0065] The detailed grid model in the large-scale wind farm-grid simulation model models the grid to which the wind farm group is connected, including the grid structure, parameters, operating status, etc. The wind farm cluster model includes the wind turbines and the full topology model of the electrical network connecting each wind turbine. The wind turbine model is further subdivided into wind turbines (the mechanical part model of the wind turbine), generators, and converters (the electrical part model of the wind turbine). The large-scale wind farm-grid simulation model runs on a real-time simulation platform and can simulate the dynamic behavior of wind farms and grids in real time.

[0066] This embodiment realizes full-link dynamic simulation from the power grid to the wind farm by integrating the power grid dispatch simulation system and the wind farm-power grid simulation model.

[0067] In one embodiment, the control module includes: a wind farm control system; the wind farm control system is used to receive dispatch instructions and yaw angle data of wind turbines in the wind farm, and generate field-level control instructions as control instructions to realize wind farm-level control simulation.

[0068] In this embodiment, the wind farm control system includes a SCADA system, AGC (automatic generation control), AVC (automatic voltage control) and primary frequency control, etc. Among them, the SCADA system is a monitoring and data acquisition system, which is used to monitor the status and operation data of each wind turbine in the wind farm in real time. AGC is used to automatically adjust the power generation of the wind farm to meet the requirements of the grid dispatching instructions. AVC is used to automatically adjust the reactive power of the wind farm to maintain the stability of the grid voltage. The primary frequency control is used to automatically adjust the active power output of the wind farm when the grid frequency changes to help restore the grid frequency.

[0069] The field-level control instructions generated by the wind farm control system include but are not limited to:

[0070] Power output command: adjust the power generation of the wind turbine to meet the dispatching requirements of the power grid.

[0071] Yaw angle adjustment command: adjusts the yaw angle of the wind turbine blades to optimize wind energy capture.

[0072] Reactive power adjustment command: adjust the reactive power output of the fan to maintain the stability of the grid voltage.

[0073] Frequency adjustment command: When the grid frequency changes, adjust the active power output of the wind turbine to help restore the grid frequency.

[0074] This embodiment realizes precise field-level control of the wind farm through the wind farm control system, which can optimize the operating status of the wind turbine and improve the overall power generation efficiency of the wind farm. It should be noted that the power grid dispatch simulation system in this embodiment generates dispatch instructions and sends them directly to the wind farm control system. The advantage of this method is that the system architecture is simple and direct interaction reduces the intermediate links. The wind farm control system can be adjusted directly according to the power grid dispatch instructions, and the response speed is fast. The control mode of this embodiment is suitable for a single wind farm or a simple group of wind farms, with simple control logic and fast response speed.

[0075] In one embodiment, the control module includes: a group control device and a wind farm control system;

[0076] The group control device is used to achieve coordination between wind farms and power grids during power dispatching and generate dispatching control instructions for each wind farm according to the dispatching instructions, so as to achieve multi-objective cluster control of wind farm groups;

[0077] The wind farm control system is used to receive dispatching control instructions and yaw angle data of wind turbines in the wind farm, and generate field-level control instructions as control instructions to realize wind farm-level control simulation.

[0078] In this embodiment, the group control device receives the grid dispatching instruction from the grid simulation module, including the power requirements and frequency regulation requirements of the grid for the wind farm group. Then, according to the grid dispatching instruction, the operation status of multiple wind farms and grid demand are comprehensively considered to perform multi-objective cluster control, and generate specific dispatching control instructions for each wind farm, including power output requirements, frequency regulation requirements, etc. Among them, multi-objective cluster control includes but is not limited to power generation improvement, life scheduling, and grid support.

[0079] The wind farm control system receives dispatch control instructions from the group control device, including the power output requirements and frequency regulation requirements of the wind farm. Then, the yaw angle of the wind turbine blades is obtained from the sensors in the wind farm. Based on the dispatch control instructions and the yaw angle data of the wind turbine, a field-level control instruction is generated and sent to each wind turbine in the wind farm to guide the operation status of each wind turbine.

[0080] It should be noted that the power grid dispatch simulation system in this embodiment generates a dispatch instruction and sends it to the group control device. The group control device receives the dispatch instruction, performs multi-objective optimization, generates a dispatch control instruction for each wind farm, and sends it to each wind farm control system. With this arrangement, the group control device can comprehensively consider the operating status and power grid demand of multiple wind farms, perform multi-objective optimization, and achieve multi-objective control such as power generation improvement, life scheduling, and power grid support. Through the mediation of the group control device, it is easier to adapt to the complex and changeable power grid and wind farm operating environment. The control mode of this embodiment is suitable for complex multi-wind farm scenarios. Global optimization and multi-objective control are achieved through the group control device, and the coordination ability is strong.

[0081] In one embodiment, it further includes: a wind farm monitoring system; the wind farm monitoring system is used to obtain electrical quantity data of the wind farm group and send it to the control module.

[0082] In this embodiment, the wind farm monitoring system collects electrical quantity data of the wind farm group in real time, including current, voltage, power, etc., and sends the collected electrical quantity data to the group control device or the wind farm control system, so that the group control device or the wind farm control system can generate control instructions for each wind farm based on relevant instructions and electrical quantity data.

[0083] In a further embodiment, the electrical quantity data includes at least: active power, reactive power and node voltages of each wind turbine in the wind farm.

[0084] In one embodiment, the flow field simulation module includes: a wake simulation link library operating device; the wake simulation link library operating device is used to calculate the inflow wind speed of each wind turbine in the wind farm based on the inflow wind speed data of the field group, and apply the inflow wind speed to the mechanical part model of the wind turbine.

[0085] In this embodiment, the wake simulation link library operation device calculates the inflow wind speed of each fan according to the inflow wind speed data of the field group. The wake simulation takes into account the influence of the upstream fan on the downstream fan, that is, the wake effect. Then, the calculated inflow wind speed data of each fan is transmitted to the mechanical part model of the fan, so that the mechanical part model of the fan simulates the mechanical behavior of the fan, including the rotor speed, blade force, etc., according to the inflow wind speed data.

[0086] This embodiment uses the wake simulation link library operation device to apply the inflow wind speed data to the wind turbine mechanical part model, which improves the simulation accuracy and makes the simulation results closer to the actual operation. At the same time, through accurate wake simulation, the layout of the wind turbine can be optimized, the wake effect can be reduced, and the overall power generation efficiency of the wind farm can be improved.

[0087] In one embodiment, the pneumatic simulation module includes: a fan master control link library operating device and a fan converter control link library operating device;

[0088] The wind turbine master control link library operation device is used to send the yaw angle data of the wind turbine to the control module and receive the control command from the control module; it is also used to generate yaw and pitch angle commands as control signals and generate power commands according to the control command and the yaw angle and pitch angle data of the wind turbine mechanical part model;

[0089] The wind turbine converter control link library operation device is used to generate a control pulse signal of the wind turbine converter according to the power instruction and the electrical quantity data of the wind turbine electrical part model.

[0090] In this embodiment, the wind turbine master control link library operation device and the wind turbine converter control link library operation device work together to achieve precise control of the wind turbine pneumatic and electrical behavior. Through detailed pneumatic and electrical simulation, the accuracy of the simulation system is improved, making the simulation results closer to the actual operation.

[0091] In one embodiment, it also includes: an information interaction module; the information interaction module includes 104 protocol, Modbus communication protocol and optical fiber communication; 104 protocol and Modbus communication protocol are used to realize data communication within the wind farm and between the wind farm and the power grid; optical fiber communication is used to realize data transmission between the wind turbine model and each simulation module.

[0092] In this embodiment, the 104 protocol is the IEC 60870-5-104 protocol, which is an international standard protocol and is widely used for data communication in power systems. Modbus is a simple and open communication protocol that is widely used in the field of industrial automation. The 104 protocol and the Modbus communication protocol ensure the reliability and compatibility of data communication within the wind farm and between the wind farm and the power grid. Optical fiber communication realizes high-speed data transmission between the wind turbine model and each simulation module, improving the real-time performance and accuracy of the simulation system. The use of standard communication protocols and high-speed transmission technology enhances the scalability and flexibility of the system, facilitating future system upgrades and expansions.

[0093] The embodiment of the present invention further provides a wind farm full-link simulation method, which is implemented based on the wind farm full-link simulation system of the above embodiment and includes the following steps:

[0094] Step 1: Generate dispatch instructions through the power grid dispatch simulation system;

[0095] Step 2: receiving the dispatch instruction and generating the control instruction through the control device;

[0096] Step 3: Calculate the flow field data of the wind farm through the flow field simulation module;

[0097] Step 4: Receive control instructions and generate control signals through the pneumatic simulation module;

[0098] Step 5: Receive control signals and flow field data through the mechanical simulation module and execute them to realize the simulation of the mechanical part of the fan;

[0099] Step 6: Receive and execute control signals through the electrical simulation module to simulate the electrical part of the fan.

[0100] The following combination Figure 2 and Figure 3 A wind farm network full-link simulation system is shown, and its simulation process is introduced.

[0101] Case 1: With group control device ( Figure 2 )

[0102] 1. The power grid dispatching simulation system communicates with the group control device through the 104 protocol and sends dispatching instructions to the group control device, including active power instructions, reactive power instructions, frequency and voltage regulation instructions, etc.

[0103] 2. The group control device obtains the active, reactive, voltage and other electrical information of each unit in the wind farm group through the 104 protocol and wind farm electrical quantity monitoring, receives the active power command, reactive power command, frequency and voltage regulation command issued by the power grid dispatch simulation system, and realizes multi-objective cluster control such as power grid support, life scheduling and power generation improvement through the multi-objective cluster control algorithm, and outputs active power command, reactive power command, frequency and voltage regulation command to each wind farm.

[0104] 3. The wind farm monitoring system interacts with the wind farm-grid simulation model through the Modbus protocol to monitor electrical quantities such as the active and reactive power of each wind turbine in the wind farm group in the simulation model and the voltage of each node.

[0105] 4. The wind farm control system mainly simulates the field-level control of the wind farm, including the SCADA system, wind farm AGC (automatic generation control), AVC (automatic voltage control), primary frequency regulation control, etc. It receives the active power instructions, reactive power instructions, frequency and voltage regulation instructions sent by the group control device through the 104 protocol, and exchanges information with the wind turbine master control link library operating device through the Modbus protocol.

[0106] 5. The wind turbine master control link library operating device calls the wind turbine master control link library program to realize the simulation of the wind turbine master control function, receives the active and reactive power control instructions of the wind farm control system through the Modbus protocol, exchanges information with the wind turbine converter controller link library operating device through optical fiber, interacts with the mechanical part model of the wind turbine in the wind farm-grid simulation model through optical fiber, sends yaw and pitch change instructions to the mechanical part model of the wind turbine, and receives the actual yaw angle and pitch angle fed back by the wind farm-grid simulation model.

[0107] 6. The wind turbine converter controller link library operating device calls the wind turbine converter controller link library program to realize the simulation of the wind turbine converter control function, receives the active and reactive power control instructions issued by the wind turbine master control link library operating device through optical fiber, interacts with the electrical part model of the wind turbine in the wind farm-grid simulation model through optical fiber, receives the voltage, current and other electrical quantities of the generator and converter, and according to the received active and reactive power control instructions and voltage, current and other electrical quantities, the wind turbine converter controller link library program calculates the control pulse signal of the wind turbine converter.

[0108] 7. The wake simulation link library operation device receives the inflow wind speed data of the farm group, calls the wake simulation link library program, calculates the wake distribution of the wind farm group and the inflow wind speed of each wind turbine, and outputs it to the mechanical part model of the wind turbine in the wind farm-grid simulation model through optical fiber communication.

[0109] 8. The large-scale wind farm-grid simulation model includes a detailed grid model and a wind farm cluster model, which runs on a real-time simulation platform. The grid model mainly simulates the grid to which the wind farm cluster is connected. The wind farm cluster model includes a wind turbine primary system model and a full topology model of the electrical network connecting each wind turbine. The wind turbine primary system model includes a wind turbine (a wind turbine mechanical part model), a generator and a converter (a wind turbine electrical part model). The wind turbine inflow wind speed of the wake simulation link library operating device, the trigger pulse signal of the wind turbine converter controller link library operating device, and the yaw and pitch control instructions of the wind turbine master control link library operating device are received to realize the closed-loop simulation of the wind farm primary system and the secondary control system, as well as the interactive simulation of the wind farm cluster and the grid.

[0110] Case 2: No group control device ( Figure 3 )

[0111] 1. The power grid dispatching simulation system communicates with the field control system through the 104 protocol and sends dispatching instructions to the field control system, including active power instructions, reactive power instructions, frequency and voltage regulation instructions, etc.

[0112] 2. The wind farm monitoring system interacts with the wind farm-grid simulation model through the Modbus protocol to monitor electrical quantities such as the active and reactive power of each wind turbine in the wind farm group in the simulation model and the voltage of each node.

[0113] 3. The wind farm control system mainly simulates the field-level control of the wind farm, including the SCADA system, wind farm AGC (automatic generation control), AVC (automatic voltage control), primary frequency control, etc. It obtains the active, reactive, voltage and other electrical information of each unit in the field through the 104 protocol and the wind farm electrical quantity monitoring, receives the active power command, reactive power command, frequency and voltage regulation command issued by the power grid dispatch simulation system, and calculates the active power command, reactive power command, frequency and voltage regulation command according to the set control function and target, and exchanges information with the wind turbine master control link library operation device through the Modbus protocol.

[0114] 4. The wind turbine master control link library operating device calls the wind turbine master control link library program to realize the simulation of the wind turbine master control function, receives the active and reactive power control instructions of the wind farm control system through the Modbus protocol, exchanges information with the wind turbine converter controller link library operating device through optical fiber, interacts with the mechanical part model of the wind turbine in the wind farm-grid simulation model through optical fiber, sends yaw and pitch change instructions to the mechanical part model of the wind turbine, and receives the actual yaw angle and pitch angle fed back by the wind farm-grid simulation model.

[0115] 5. The wind turbine converter controller link library operating device calls the wind turbine converter controller link library program to realize the simulation of the wind turbine converter control function, receives the active and reactive power control instructions issued by the wind turbine master control link library operating device through optical fiber, interacts with the electrical part model of the wind turbine in the wind farm-grid simulation model through optical fiber, receives the voltage, current and other electrical quantities of the generator and converter, and according to the received active and reactive power control instructions and voltage, current and other electrical quantities, the wind turbine converter controller link library program calculates the control pulse signal of the wind turbine converter.

[0116] 6. The wake simulation link library operation device receives the inflow wind speed data of the farm group, calls the wake simulation link library program, calculates the wake distribution of the wind farm group and the inflow wind speed of each wind turbine, and outputs it to the mechanical part model of the wind turbine in the wind farm-grid simulation model through optical fiber communication.

[0117] 7. The large-scale wind farm-grid simulation model includes a detailed grid model and a wind farm cluster model, which runs on a real-time simulation platform. The grid model mainly simulates the grid to which the wind farm cluster is connected. The wind farm cluster model includes a wind turbine primary system model and a full topology model of the electrical network connecting each wind turbine. The wind turbine primary system model includes a wind turbine (a wind turbine mechanical part model), a generator and a converter (a wind turbine electrical part model). The wind turbine inflow wind speed of the wake simulation link library operating device, the trigger pulse signal of the wind turbine converter controller link library operating device, and the yaw and pitch control instructions of the wind turbine master control link library operating device are received to realize the closed-loop simulation of the wind farm primary system and the secondary control system, as well as the interactive simulation of the wind farm cluster and the grid.

[0118] 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 wind farm full-link simulation system, characterized in that: include: Power grid simulation module, control module, electrical simulation module, mechanical simulation module, pneumatic simulation module and flow field simulation module; The power grid simulation module operates based on a pre-established wind farm-power grid simulation model, and is used to perform power dispatch simulation and generate dispatch instructions; The control module is used to receive the dispatch instruction and generate a control instruction for the wind farm; The flow field simulation module is used to calculate the flow field data of the wind farm; The pneumatic simulation module is used to generate a control signal for the fan according to the control instruction; The mechanical simulation module runs based on the mechanical part model of the fan and is used to simulate the mechanical part of the fan according to the flow field data and the control signal; The electrical simulation module runs based on the wind turbine electrical part model and is used to realize the wind turbine electrical part simulation according to the control signal; the wind turbine mechanical part model and the wind turbine electrical part model are both sub-models of the wind farm simulation model in the wind farm-grid simulation model.

2. The wind farm full-link simulation system according to claim 1, characterized in that: The power grid simulation module includes: a power grid dispatch simulation system and a wind farm-power grid simulation model; The wind farm-grid simulation model includes a detailed grid model and a wind farm cluster model; The wind farm cluster model is used to simulate the wind farm cluster; The detailed power grid model is used to simulate the power grid to which the wind farm group is connected; The power grid dispatch simulation system is used to perform power dispatch simulation based on the power grid detailed model and the wind farm cluster model, and generate the dispatch instruction.

3. The wind farm full-link simulation system according to claim 1, characterized in that: The control module includes: a wind farm control system; The wind farm control system is used to receive the dispatching instruction and the yaw angle data of the wind turbines in the wind farm, and generate a field-level control instruction as the control instruction to realize the wind farm-level control simulation.

4. The wind farm full-link simulation system according to claim 1, characterized in that: The control module includes: a group control device and a wind farm control system; The group control device is used to achieve coordination between the wind farm and the power grid during power dispatching and generate dispatching control instructions for each wind farm according to the dispatching instructions to achieve multi-objective cluster control of the wind farm group; The wind farm control system is used to receive the dispatching control instruction and the yaw angle data of the wind turbines in the wind farm, and generate a field-level control instruction as the control instruction to realize the wind farm-level control simulation.

5. The wind farm full-link simulation system according to claim 3 or 4, characterized in that: Also includes: Wind farm monitoring system; The wind farm monitoring system is used to obtain the electrical quantity data of the wind farm group and send it to the control module.

6. The wind farm full-link simulation system according to claim 1, characterized in that: The electrical quantity data at least includes: active power, reactive power and node voltages of each wind turbine in the wind farm.

7. The wind farm full-link simulation system according to claim 1, characterized in that: The flow field simulation module includes: a wake simulation link library operation device; The wake simulation link library operation device is used to calculate the inflow wind speed of each wind turbine in the wind farm according to the inflow wind speed data of the farm group, and to apply the inflow wind speed to the mechanical part model of the wind turbine.

8. The wind farm full-link simulation system according to claim 1, characterized in that: The pneumatic simulation module includes: a fan main control link library operating device and a fan converter control link library operating device; The wind turbine master control link library operation device is used to send the yaw angle data of the wind turbine to the control module and receive the control instruction from the control module; it is also used to generate yaw and pitch angle instructions as the control signal and generate power instructions according to the control instruction and the yaw angle and pitch angle data of the wind turbine mechanical part model; The wind turbine converter control link library operation device is used to generate a control pulse signal for the wind turbine converter according to the power instruction and the electrical quantity data of the wind turbine electrical part model.

9. The wind farm full-link simulation system according to claim 1, characterized in that: Also includes: Information interaction module; The information interaction module includes 104 protocol, Modbus communication protocol and optical fiber communication; The 104 protocol and Modbus communication protocol are used to realize data communication within the wind farm and between the wind farm and the power grid; The optical fiber communication is used to realize data transmission between the wind turbine model and each simulation module.

10. A wind farm full-link simulation method, characterized in that: The wind farm full-link simulation system according to any one of claims 1 to 9 is implemented, comprising the following steps: Generate dispatching instructions through the power grid dispatching simulation system; Receiving the dispatch instruction and generating a control instruction through a control device; Calculate the flow field data of the wind farm through the flow field simulation module; Receiving the control instruction and generating a control signal through a pneumatic simulation module; The control signal and the flow field data are received and executed by a mechanical simulation module to realize the simulation of the mechanical part of the fan; The control signal is received and executed by the electrical simulation module to realize the simulation of the electrical part of the fan.

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