A wind power converter control and monitoring system

Abstract

The utility model relates to wind power generation technical field discloses a kind of wind power converter control and monitoring system, including machine side controller, net side controller, upper controller and host computer;The state signal input end of machine side controller connects machine side converter, and state signal output end connects upper controller;The control signal input end of machine side controller connects upper controller, and control signal output end connects machine side converter;Machine side converter is wind power generator side wind power converter;The upper controller connects host computer, is configured as the state information and setting parameter of wind power converter to host computer upload, and receives the control instruction and parameter setting information issued by host computer. The utility model obtains wind power converter real-time information by data upload, and grasps wind power converter grade wind power generator set operating state on one hand;On the other hand, control to converter is realized by data issue.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a wind power converter control and monitoring system. Background Technology

[0002] As a renewable energy generation technology with large-scale development potential, wind power has become one of the core pillars of my country's energy structure transformation, with its installed capacity and energy contribution in the new power system continuing to rise. As a core link in the wind power industry chain, the continuous iteration of wind power technology has not only driven the transformation of energy production methods, but also placed higher demands on the flexibility, stability, and economy of the power system.

[0003] Wind power converters are the core components for energy conversion and control in wind turbine generators, and their technical performance directly determines the grid adaptability and power regulation capabilities of the wind turbine generators. The core function of this equipment is to convert the variable frequency and voltage AC power output from wind turbines (especially mainstream doubly-fed induction generators and permanent magnet synchronous generators) into constant frequency and voltage electrical energy conforming to grid standards through rectification, filtering, and inversion, thereby achieving reliable energy feed into the grid. In the context of new power systems with a high proportion of renewable energy grid integration, the role of wind power converters has upgraded from a traditional "energy conversion unit" to a "system support unit." They need to possess grid support capabilities such as low voltage ride-through (LVRT), high voltage ride-through (HVRT), inertial response, and primary frequency regulation to cope with grid voltage / frequency fluctuations and improve system transient stability.

[0004] From a topological perspective, wind turbine converters typically employ a back-to-back dual PWM (Pulse Width Modulation) converter topology, consisting of a generator-side converter (MSC), a grid-side converter (GSC), and an intermediate DC bus. The generator-side converter is directly connected to the generator stator or rotor, using vector control strategies to precisely regulate generator speed and torque, thereby tracking the Maximum Power Capture (MPPT) curve and maximizing the wind energy utilization factor (Cp). The grid-side converter connects the DC bus to the grid, its main function being to maintain DC bus voltage stability while simultaneously achieving unity power factor control, reactive power regulation, and harmonic suppression, ensuring that the power quality of the grid-connected current meets relevant requirements. The coordinated control of these two converters is crucial for ensuring efficient and stable operation of wind turbines across a wide wind speed range. The sophistication of their control algorithms (such as model predictive control and sliding mode control) directly impacts the dynamic response speed and grid-connected performance of the turbine.

[0005] As a complex nonlinear system integrating mechanics, electrical systems, and control systems, the operating status of wind turbines is affected by a combination of environmental factors such as wind speed, turbulence, and temperature, as well as the aging of their own components. To achieve optimal wind energy capture efficiency and return on assets throughout the entire life cycle, a comprehensive condition monitoring and full life cycle management system needs to be established during the commissioning and operation and maintenance phases of the unit. Utility Model Content

[0006] To address the aforementioned issues, this invention proposes a wind power converter control and monitoring system. On one hand, it acquires real-time information about the wind power converter by uploading data to monitor the operating status of the wind power converter and the wind turbine unit. On the other hand, it controls the converter by sending data down to the converter.

[0007] The technical solution adopted in this utility model is as follows: A wind power converter control and monitoring system includes a machine-side controller, a grid-side controller, a host controller, and a host computer; The status signal input terminal of the machine-side controller is connected to the machine-side converter, and the status signal output terminal is connected to the host controller; the control signal input terminal of the machine-side controller is connected to the host controller, and the control signal output terminal is connected to the machine-side converter; the machine-side converter is a wind power converter on the wind turbine generator side; The status signal input terminal of the grid-side controller is connected to the grid-side converter, and the status signal output terminal is connected to the host controller; the control signal input terminal of the grid-side controller is connected to the host controller, and the control signal output terminal is connected to the grid-side converter; the grid-side converter is a wind power converter on the grid side. The upper controller is connected to the upper computer and is configured to upload the status information and setting parameters of the wind power converter to the upper computer, and to receive control commands and parameter setting information issued by the upper computer.

[0008] Furthermore, the machine-side controller includes an analog sampling unit, a digital input unit, a core control unit, a PWM output unit, and a digital output unit, with the core control unit connected to the analog sampling unit, the digital input unit, the PWM output unit, and the digital output unit, respectively.

[0009] Furthermore, the analog sampling unit and digital input unit of the machine-side controller are connected to the machine-side converter to collect the status signals of the machine-side converter.

[0010] Furthermore, the core control unit of the machine-side controller is configured to receive control commands via Ethernet and CAN ports, and output them to the machine-side converter via PWM output unit and digital output unit.

[0011] Furthermore, the network-side controller includes an analog sampling unit, a digital input unit, a core control unit, a PWM output unit, and a digital output unit, with the core control unit connected to the analog sampling unit, the digital input unit, the PWM output unit, and the digital output unit, respectively.

[0012] Furthermore, the analog sampling unit and digital input unit of the grid-side controller are connected to the grid-side converter to collect the status signals of the grid-side converter.

[0013] Furthermore, the core control unit of the grid-side controller is configured to receive control commands via Ethernet and CAN ports, and output them to the grid-side converter via PWM output unit and digital output unit.

[0014] Furthermore, the upper-level controller includes an analog sampling unit, a digital I / O unit, and a signal processing unit, with the signal processing unit connected to the analog sampling unit and the digital I / O unit respectively. The analog sampling unit and the digital I / O unit are configured to acquire relevant analog and digital signals of the wind power converter and process them accordingly through the signal processing unit. The digital I / O unit is also configured to output digital control signals to the turbine-side controller and the grid-side controller.

[0015] Furthermore, the upper-level controller also includes two CAN ports. One CAN port is connected to the wind turbine main control system to receive control commands from the wind turbine main control system and send the status signal of the wind power converter to the wind turbine main control system. The other CAN port is connected to the machine-side controller and the grid-side controller to send control commands to the machine-side controller and the grid-side controller, and to obtain the status signal of the wind power converter.

[0016] Furthermore, the upper controller also includes an Ethernet port, which is connected to a network with the upper computer. On the one hand, it receives control commands from the upper computer, and on the other hand, it transmits the status and setting parameters of the wind power converter to the upper computer.

[0017] The beneficial effects of this utility model are as follows: 1. Independent control of generator-side and grid-side converters. The generator-side controller acquires generator-side status signals through analog sampling, digital input, and fiber optic interface, receives and processes commands via Ethernet / CAN port, and outputs PWM and digital control signals to control the generator-side converter. The grid-side controller acquires grid-side signals and receives commands using the same hardware logic, and outputs control signals to manage the grid-side converter. The two controllers operate independently to ensure the realization of the core functions of the converter.

[0018] 2. Commissioning and monitoring of generator-side and grid-side converters. The host computer communicates with the generator-side and grid-side controllers, as well as the host controller, to issue control commands and parameter setting information, while simultaneously acquiring converter status and setting parameters, thereby completing converter parameter configuration, real-time status monitoring, and commissioning operations.

[0019] 3. Signal interaction between the wind power converter and the wind turbine main control system. The upper controller connects to the wind turbine main control system via the CAN port, receiving commands such as start / stop, torque, and reactive power. At the same time, it feeds back status signals such as converter voltage and current, realizing signal interaction between the converter and the wind turbine main control system, coordinating with the stable operation of the unit, and ensuring normal power generation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the wind power converter control and monitoring system proposed in this utility model at the location of the wind turbine generator set.

[0021] Figure 2 This is a schematic diagram of the structure of a wind power converter control and monitoring system according to an embodiment of this utility model. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it; that is, the described embodiments are only a part of, and not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] The wind power converter is a core component of a wind turbine generator set, responsible for energy conversion and grid connection control. For example... Figure 1 As shown, the wind power converter is located between the generator and the power grid. It is responsible for converting the voltage and frequency-varying electrical energy generated by the generator into electrical energy with stable voltage and frequency, and feeding it into the power grid after being stepped up by the transformer.

[0024] like Figure 1 and Figure 2 As shown, this embodiment provides a wind power converter control and monitoring system, including a machine-side controller, a grid-side controller, a host controller, and a host computer, wherein: The status signal input terminal of the turbine-side controller is connected to the turbine-side converter, and the status signal output terminal is connected to the host controller; the control signal input terminal of the turbine-side controller is connected to the host controller, and the control signal output terminal is connected to the turbine-side converter; the turbine-side converter is a wind power converter on the wind turbine generator side; The status signal input terminal of the grid-side controller is connected to the grid-side converter, and the status signal output terminal is connected to the host controller; the control signal input terminal of the grid-side controller is connected to the host controller, and the control signal output terminal is connected to the grid-side converter; the grid-side converter is a wind power converter on the grid side. The upper controller is connected to the upper computer and is configured to upload the status information and setting parameters of the wind power converter to the upper computer, and to receive control commands and parameter setting information issued by the upper computer.

[0025] Preferably, the machine-side controller includes an analog sampling unit, a digital input unit, a core control unit, a PWM output unit, and a digital output unit. The core control unit is connected to the analog sampling unit, the digital input unit, the PWM output unit, and the digital output unit, respectively. The analog sampling unit and the digital input unit are connected to the machine-side converter to collect the status signals of the machine-side converter. The core control unit is configured to receive control commands through an Ethernet port and a CAN port, and output them to the machine-side converter through the PWM output unit and the digital output unit.

[0026] In this embodiment, the machine-side controller acquires the status signals of the converter through an analog sampling unit, a digital input unit, and an optical fiber interface, and receives control commands through an Ethernet port and a CAN port. After control calculation, it obtains PWM control signals and digital control signals for the control of the machine-side converter, and outputs them through the PWM output unit and the digital output unit, respectively.

[0027] Preferably, the grid-side controller includes an analog sampling unit, a digital input unit, a core control unit, a PWM output unit, and a digital output unit. The core control unit is connected to the analog sampling unit, the digital input unit, the PWM output unit, and the digital output unit, respectively. The analog sampling unit and the digital input unit are connected to the grid-side converter to collect the status signals of the grid-side converter. The core control unit is configured to receive control commands through an Ethernet port and a CAN port, and output them to the grid-side converter through the PWM output unit and the digital output unit.

[0028] In this embodiment, the grid-side controller acquires the status signals of the converter through an analog sampling unit, a digital input unit, and an optical fiber interface, and receives control commands through an Ethernet port and a CAN port. After control calculation, it obtains PWM control signals and digital control signals for grid-side converter control, and outputs them through the PWM output unit and the digital output unit, respectively.

[0029] Preferably, the upper-level controller includes an analog sampling unit, a digital I / O unit, and a signal processing unit, with the signal processing unit connected to the analog sampling unit and the digital I / O unit respectively. The analog sampling unit and the digital I / O unit are configured to acquire relevant analog and digital signals of the wind power converter and process them accordingly through the signal processing unit. The digital I / O unit is also configured to output digital control signals to the turbine-side controller and the grid-side controller.

[0030] In this embodiment, the host controller acquires relevant analog and digital signals of the converter through the analog sampling unit and the digital I / O unit, and then obtains the converter digital control signal through logic control based on the signals exchanged between the Ethernet port and the CAN port, and outputs it through the digital I / O unit.

[0031] Preferably, the upper-level controller also includes two CAN ports. One CAN port is connected to the wind turbine main control system to receive control commands such as start / stop, torque, and reactive power from the wind turbine main control system, and to send status signals such as voltage and current of the wind power converter to the wind turbine main control system. The other CAN port is connected to the turbine-side controller and the grid-side controller to send control commands to the turbine-side controller and the grid-side controller, and to acquire status signals of the wind power converter.

[0032] Preferably, the host controller also includes an Ethernet port, which is connected to a network with the host computer. On the one hand, it receives control commands from the host computer, and on the other hand, it transmits the status and setting parameters of the wind power converter to the host computer.

[0033] In summary, the wind power converter control and monitoring system of this utility model has the following advantages: first, it can directly control the converters on the turbine side and the grid side; second, it can modify the converter control parameters and send control commands through the host computer, and monitor the converter's operating status; and third, it can realize signal interaction between the converter and the wind turbine's main control system, so as to cooperate with the stable operation of the unit and achieve normal power generation.

[0034] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", and "connect" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be wired connections or wireless connections.

Claims

1. A wind power converter control and monitoring system, characterized in that This includes the machine-side controller, the network-side controller, the host controller, and the host computer; The status signal input terminal of the machine-side controller is connected to the machine-side converter, and the status signal output terminal is connected to the host controller; the control signal input terminal of the machine-side controller is connected to the host controller, and the control signal output terminal is connected to the machine-side converter; the machine-side converter is a wind power converter on the wind turbine generator side; The status signal input terminal of the grid-side controller is connected to the grid-side converter, and the status signal output terminal is connected to the host controller; the control signal input terminal of the grid-side controller is connected to the host controller, and the control signal output terminal is connected to the grid-side converter; the grid-side converter is a wind power converter on the grid side. The upper controller is connected to the upper computer and is configured to upload the status information and setting parameters of the wind power converter to the upper computer, and to receive control commands and parameter setting information issued by the upper computer.

2. The wind power converter control and monitoring system according to claim 1, characterized in that, The machine-side controller includes an analog sampling unit, a digital input unit, a core control unit, a PWM output unit, and a digital output unit. The core control unit is connected to the analog sampling unit, the digital input unit, the PWM output unit, and the digital output unit, respectively.

3. A wind power converter control and monitoring system according to claim 2, characterized in that, The analog sampling unit and digital input unit of the machine-side controller are connected to the machine-side converter to collect the status signals of the machine-side converter.

4. A wind power converter control and monitoring system according to claim 3, characterized in that, The core control unit of the machine-side controller is configured to receive control commands via Ethernet and CAN ports, and output them to the machine-side converter via PWM output unit and digital output unit.

5. A wind power converter control and monitoring system according to claim 1, characterized in that, The network-side controller includes an analog sampling unit, a digital input unit, a core control unit, a PWM output unit, and a digital output unit. The core control unit is connected to the analog sampling unit, the digital input unit, the PWM output unit, and the digital output unit, respectively.

6. A wind power converter control and monitoring system according to claim 5, characterized in that, The analog sampling unit and digital input unit of the grid-side controller are connected to the grid-side converter to collect the status signals of the grid-side converter.

7. A wind power converter control and monitoring system according to claim 5, characterized in that, The core control unit of the grid-side controller is configured to receive control commands via Ethernet and CAN ports, and output them to the grid-side converter via PWM output unit and digital output unit.

8. A wind power converter control and monitoring system according to claim 1, characterized in that, The upper-level controller includes an analog sampling unit, a digital I / O unit, and a signal processing unit. The signal processing unit is connected to the analog sampling unit and the digital I / O unit respectively. The analog sampling unit and the digital I / O unit are configured to collect relevant analog and digital signals of the wind power converter and process them accordingly through the signal processing unit. The digital I / O unit is also configured to output digital control signals to the turbine-side controller and the grid-side controller.

9. A wind power converter control and monitoring system according to claim 8, characterized in that, The upper-level controller also includes two CAN ports. One CAN port is connected to the wind turbine main control system to receive control commands from the wind turbine main control system and send the status signal of the wind power converter to the wind turbine main control system. The other CAN port is connected to the machine-side controller and the grid-side controller to send control commands to the machine-side controller and the grid-side controller, and to obtain the status signal of the wind power converter.

10. A wind power converter control and monitoring system according to claim 8, characterized in that, The upper controller also includes an Ethernet port, which connects to a network with the upper computer. On the one hand, it receives control commands from the upper computer, and on the other hand, it transmits the status and setting parameters of the wind power converter to the upper computer.

Images