CN203114528U - Wind power monitoring and fault diagnosis system - Google Patents

Abstract

The utility model provides a wind power monitoring and fault diagnosis system, including: a station control layer computer monitoring network, an interval layer data communication network, a power grid EMS system, a data acquisition system, a substation measurement, control and protection system, a remote workstation and a unit (1... n); the station control layer computer monitoring network carries out data interaction with the power grid EMS system, the data acquisition system, and the substation measurement, control and protection system respectively through the interval layer data communication network; the station control layer computer monitoring The remote workstation is controlled by the network; the data acquisition system respectively collects data of units (1...n); each unit (1...n) includes wind turbines that transmit data to the data acquisition system respectively And wind turbine main control system; wind power monitoring and fault diagnosis system can realize the monitoring of wind power electrical quantity and the function of wind turbine status monitoring and fault diagnosis at the same time, so that it can predict the fault status of wind turbine while monitoring wind power and call the police.

Description

Wind power monitoring and fault diagnosis system

technical field

The utility model belongs to the field of monitoring of wind farms in new energy power generation technology and the state monitoring and fault diagnosis of wind power units, in particular to a wind power monitoring and fault diagnosis system.

Background technique

Compared with thermal power and nuclear power, wind power has a small single-unit capacity and a large area, and most of them are located in remote areas. The technology and operating conditions are relatively poor. To carry out effective standardized management and improve the efficiency of wind farms, a set of monitoring and management systems with perfect performance is crucial to the operation of wind farms.

Wind turbines are generally equipped with a data acquisition and monitoring (SCADA) system, which can realize basic monitoring of the operation of wind turbines, has functions such as alarming and reporting, and can generate wind farm event reports. Reliability provides strong support. The SCADA system is sometimes limited by conditions, the data processing speed of the system is slow, the degree of automation is low, and the parameters monitored are limited to electrical quantities, such as current, voltage, active power and reactive power, etc., and the realized functions are mainly concentrated in electrical aspects. For wind turbines with a design life of 20 to 25 years, the first repair or maintenance peak will be ushered in about 5 to 7 years. In countries or regions where wind power started relatively late, most wind farms are about to enter this period. In order to reduce the cost of wind power operation and maintenance, people pay more and more attention to a new maintenance method, that is, condition monitoring and fault diagnosis. The signal collected by the condition monitoring and fault diagnosis system is the vibration and impact information of the wind turbine transmission chain, tower, blade, etc. At present, it can realize fault location, prediction and alarm online, as well as precise fault diagnosis such as fault cause and development trend. Restrictions still need to be completed in the laboratory. The application of condition monitoring and fault diagnosis technology of wind turbines can not only change the downtime of failures into planned outages, reduce downtimes or avoid the expansion of accidents, but also make the enterprise's maintenance management of equipment gradually transition from accidental maintenance and planned maintenance to condition monitoring. Basic preventive maintenance ensures the safe and reliable operation of wind turbines, improves the modernization level of enterprise equipment management, and can detect defects in mechanical structure design and unreasonable parts selection in time during fault diagnosis, which provides a basis for equipment optimization. The design provides a practical and reliable basis. At present, a small number of wind turbines have been equipped with wind turbine condition monitoring and fault diagnosis equipment.

Utility model content

In order to overcome the above-mentioned defects, the utility model provides a wind power monitoring and fault diagnosis system, which can simultaneously realize the monitoring of wind power electrical quantity and the functions of wind power unit status monitoring and fault diagnosis, so that it can monitor wind power while also being able to The fault status of the wind turbine can be predicted and alarmed, and when the operation of the wind turbine is abnormal, the cause and development trend of the fault can be precisely diagnosed.

In order to achieve the above purpose, the utility model provides a wind power monitoring and fault diagnosis system. The improvement is that the system includes: a station control layer computer monitoring network, an interval layer data communication network, a power grid EMS system, a data acquisition system, Substation measurement and control protection system, remote workstation and unit (1...n); the computer monitoring network of the station control layer communicates with the EMS system of the power grid, the data acquisition system, and the substation respectively through the data communication network of the bay layer The measurement, control and protection system performs data interaction; the station control layer computer monitors the network to control the remote workstation; the data acquisition system respectively collects the data of the units (1...n); the units (1...n ) includes a wind turbine unit and a wind turbine master control system that respectively transmit data to the data acquisition system.

In the optimal technical solution provided by the utility model, the computer monitoring network of the station control layer includes: operator workstations 1 and 2, service hosts, service standby machines, five-defense workstations, protection division workstations, management workstations, wind power Forecast workstation, condition monitoring and fault diagnosis workstation, manual analysis terminal, Web server and network printer.

In the second preferred technical solution provided by the utility model, the data communication network at the bay layer includes: a plurality of communication control units connected in sequence.

In the third preferred technical solution provided by the utility model, the communication control unit adopts a device of model NSC300.

In the fourth preferred technical solution provided by the utility model, the EMS system of the power grid is connected with the data communication network of the compartment layer through a router.

In the fifth preferred technical solution provided by the utility model, the data acquisition system includes: a tower impeller information collector and a vibration sensor, an axial piezoelectric sensor and a displacement sensor respectively connected to it; the vibration sensor adopts a model of PCB356A15 Or a vibration sensor of PCB352C33; the tower impeller information collector is provided with a data processing board.

In the sixth preferred technical solution provided by the utility model, the substation measurement, control and protection system includes: a measurement and control device and a third-party intelligent device that respectively transmit data to the computer monitoring network of the station control layer.

In the seventh preferred technical solution provided by the utility model, the third-party smart device is an interface device.

Compared with the prior art, the wind power monitoring and fault diagnosis system provided by the utility model can realize the functions of the wind power SCADA and the wind power unit state monitoring and fault diagnosis systems, but compared with the wind power SCADA system, the hardware is only more The airborne data acquisition and analysis system, status monitoring and fault diagnosis workstation and manual analysis terminal are developed, which saves costs compared with the above two systems respectively; solves the problem of monitoring electrical and mechanical quantities on a wind motor In addition, when the operating state of the unit is abnormal, it is necessary to use the conventional wind power SCADA system and the wind power unit status monitoring and fault diagnosis system to be able to promptly and accurately locate the fault and perform precise diagnosis of the fault, and these two systems are independent of each other. There is no connection, such as the generator speed and yaw angle signals need to be collected repeatedly, and the data communication between the wind turbine and the wind farm monitoring center needs to be established and debugged separately; the system does not need to repeatedly collect the generator speed, yaw angle signal electrical Share the communication channel from the wind turbine to the wind farm monitoring center with the mechanical technical parameters; analyze the mechanical and electrical technical parameters through professional software to form an associated array, and use it to complete the comprehensive evaluation of the operating status of the wind turbine, which improves the judgment accuracy and reliability; in addition, this system adopts an independent data acquisition system, which does not need to consider the model of the unit to be monitored, and only needs to select the appropriate intelligent acquisition module, sensor and corresponding data acquisition device to realize Monitoring of different types of units; moreover, according to the scale of the wind farm and the needs of users, it is convenient to complete the tailoring of the system and the selection of each functional module.

Description of drawings

Figure 1 is a complete structural block diagram of the wind power monitoring and fault diagnosis system.

Figure 2 is a complete hardware topology diagram of the wind power monitoring and fault diagnosis system.

Figure 3 is a typical configuration of the station control layer computer monitoring network.

Figure 4 is a typical configuration of the bay layer data communication network.

Fig. 5 is a schematic diagram of the hardware topology of the ring network including the measurement and control information of the box-type transformer.

Fig. 6 is a hardware topology diagram of the wind power monitoring and fault system in the embodiment.

Fig. 7 is a schematic diagram of the communication upgrade topology with the grid EMS system.

Detailed ways

As shown in Figure 1, the wind power monitoring and fault diagnosis system includes: computer monitoring network at station control layer, data communication network at bay layer, power grid EMS system, data acquisition system, substation measurement, control and protection system, remote workstation and unit (1... n); the station control layer computer monitoring network carries out data interaction with the power grid EMS system, the data acquisition system, and the substation measurement, control and protection system respectively through the interval layer data communication network; the station control layer computer monitoring The remote workstation is controlled by the network; the data collection system respectively collects data of units (1...n); the station control layer computer monitoring network receives wind farm weather information through the bay layer data communication network.

The computer monitoring network of the station control layer includes: operator workstations 1 and 2 connected in sequence, service host, service standby machine, five-defense workstation, protector workstation, management workstation, wind power forecast workstation, status monitoring and fault diagnosis workstation, Manual analysis of terminals, web servers and network printers.

The bay layer data communication network includes: a plurality of communication control units connected in sequence.

The communication control unit adopts a device modeled as NSC300.

The power grid EMS system is connected to the bay layer data communication network through a router.

The data acquisition system includes: a tower impeller information collector and a vibration sensor, an axial piezoelectric sensor and a displacement sensor respectively connected to it, and the vibration sensors adopt the vibration sensors of the models PCB356A15 and PCB352C33.

The tower impeller information collector is provided with a data processing board, and the data processing board is used for extracting and storing wind turbine data and wind farm data.

The wind turbine data includes: voltage, current, active power, reactive power, power generation, generator speed, yaw angle, movement trajectory of the main shaft axis of the transmission chain, vibration and impact information of each mechanical part of the transmission chain, And the vibration information of the tower and blades; the wind farm data includes: wind speed, active power, reactive power and meteorological information.

The substation measurement, control and protection system includes: a measurement and control device and a third-party intelligent device that respectively transmit data to the computer monitoring network of the station control layer. The third-party smart device is an interface device.

The remote workstation accepts the control of the station control layer computer monitoring network through a gateway and a firewall.

Each of the units (1...n) includes: a wind turbine unit and a wind turbine master control system that respectively transmit data to the data acquisition system.

The wind power monitoring and fault diagnosis system will be further described in detail in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, the present invention mainly includes a data acquisition system, a substation measurement and control protection system, a bay layer data communication network, a station control layer computer monitoring network, a remote workstation and a GPS system, and the bay layer data communication network can pass through The switchboard and power dedicated line are connected with the grid dispatching (EMS) system for data communication. The data acquisition system is located in the on-site environment of the wind farm and the wind farm, and is responsible for collecting the technical parameters of the wind farm and the wind farm, and transmitting the collected data to the stand-alone data processing and transmission unit; the stand-alone data processing and transmission unit, Complete the processing of the collected data and then upload it to the bay layer data communication network; the substation measurement, control and protection system is responsible for the telecontrol function of the automation system of the substation, and uploads the collected analog quantities, digital quantities, state quantities and protection information after processing To the interval layer data communication network; the interval layer data communication network is connected to the computer monitoring network of the station control layer through a switch, and according to the demand, the power dedicated line is set to connect with the power grid dispatching (EMS) system for data communication; the station control layer The computer monitoring network receives data from the bay layer data communication network, performs man-machine operation processing according to the actual operation needs of wind farms and wind turbines, and issues control commands to the stand-alone data processing and transmission unit and the substation measurement, control and protection system.

Fig. 2 is the complete hardware topological diagram of the present invention, has possessed all elements of the system structure of the present invention, and some workstations of the interval layer data communication network and the station control layer computer monitoring network have adopted the standby unit. In practical applications, the system of the present invention can be simplified and tailored according to the size and functional requirements of the wind farm. Figure 3 and Figure 4 respectively show the typical configurations of the station control layer computer monitoring network and the bay layer data communication network in the present invention , where the substation measurement, control and protection system in Figure 4 adopts the standard configuration.

In order to describe the present invention in more detail and reflect the feature of easy cutting of the present invention, a specific example is listed below. It should be noted that this example is implemented on the premise of the technical solution of the present invention, but the protection scope of the present invention is not limited to the following examples.

The invention is applied to a 50MW wind farm, and the wind farm has 33 doubly-fed asynchronous variable-speed wind turbines with a single unit capacity of 1.5MW and a total capacity of 50MW. The outlet of the wind turbine is boosted by a transformer of 0.69/35kV, and connected to the 35/110kV unattended substation through four 35kV feeder cables to be connected to the power grid; in addition, the wind farm also has a wind measuring tower.

Wind farms and host manufacturers require the system of the present invention to have: the function of monitoring multiple types of wind turbines from multiple manufacturers; the function of monitoring wind tower information; Carry out remote control and remote adjustment, including the box-type transformer of each wind turbine; have the status monitoring and fault diagnosis functions of the wind turbine, and give an alarm prompt when the transmission chain of the unit runs abnormally; have the remote Web browsing function, but the remote Web browsing can only Check the running status of the wind turbine but not control the running status of the wind turbine; it is not necessary to have the interface function with the EMS system of the power grid, but it must have the ability to be upgraded; when the wind turbine is running abnormally, it needs to have a remote alarm function, and the alarm information can be emailed , fax and telephone to send to the host manufacturer.

According to described conditional requirements, system configuration and implementation of the present invention are as follows:

1. Networking: Considering the reliability and economy of the network, all wind turbines, box-type transformers and wind-measuring towers constitute two ring networks, which are uniformly connected to the data communication network at the bay layer; due to the need to monitor box-type transformer information, Therefore, a switch should be installed on the side of each wind turbine to integrate the information of the stand-alone data processing and transmission unit with the transformer measurement and control device. In this case, the schematic diagram of the ring network structure is shown in Figure 5.

2. System structure. The proposed system structure of the present invention is shown in FIG. 6 . The data communication network of the bay layer mainly includes three communication control units, two of which are responsible for the reception and protocol conversion of wind farm data (including wind turbines and wind measuring towers), and one is responsible for the reception and protocol conversion of substation data; the station control layer computer monitoring network It includes two mutually hot standby data servers, one status monitoring and fault diagnosis workstation, one Web server, two operator workstations and one network printer; in order to ensure the reliability of the system, the data servers are configured with dual network cards. The web server is connected to the Internet through a gateway/router, and mainly provides browsing functions for remote workstations; among the two operator workstations, one is responsible for the comprehensive monitoring of the wind farm, including the monitoring of electrical and mechanical quantities, and the other is responsible for the comprehensive monitoring of the substation. Monitoring, the functions of the two workstations can be combined and switched arbitrarily; the report and graphic output functions of the system are in charge of the network printer. The computer monitoring network at the station control layer is 10/100M Ethernet, and a 24-port switch is responsible for the exchange of network data; the remote Web browsing function is realized by adding a gateway device between the computer monitoring network at the station control layer and the remote workstation. The gateway device has the function of router/firewall/VPN server, and provides web browsing service for remote computers by configuring the network address translation (NAT) function, and the user of web browsing does not have the control function. In addition, the gateway device also provides VPN dial-up access service, Remote users can connect to the station control layer computer monitoring network through the modem dial-up method through the telephone line. Although this dial-up method is slow, it has high security.

3. Communication upgrade plan with EMS system of power grid. If the system needs to communicate with the EMS system of the power grid to realize functions such as automatic power generation monitoring and reporting, the system can be modified as follows: the function of communicating with the EMS system of the power grid is realized by the communication control unit in the data communication network of the bay layer; It contains multiple communication control units, so it is necessary to connect each communication control unit, and then connect to the grid EMS through a switch and a dedicated power line to realize data communication, as shown in Figure 7; the communication protocol generally adopts the 104 protocol.

4. Remote alarm scheme. In order to ensure the security of the system, generally the data server and operator workstation in the computer monitoring network at the station control layer do not have the networking function. In order to realize the function of sending alarm information by e-mail, it can Set up an SMTP server or proxy server, and the operator workstation sends emails containing alarm information to a specific email account through the SMTP server or proxy server; in order to realize the function of telephone and fax alarm, a Modem can be installed on the operator workstation, and the telephone line Connect, and set in the system software platform to automatically send faxes and automatically dial and send out voice alarms when an alarm event occurs.

It should be declared that the content and specific implementation of the utility model are intended to prove the practical application of the technical solutions provided by the utility model, and should not be interpreted as limiting the protection scope of the utility model. Under the inspiration of the spirit and principle of the present utility model, those skilled in the art may make various modifications, equivalent replacements, or improvements. But these changes or modifications are all within the protection scope of the pending application.

Claims (8)

1. A wind power monitoring and fault diagnosis system, characterized in that the system includes: station control layer computer monitoring network, bay layer data communication network, power grid EMS system, data acquisition system, substation measurement and control protection system, remote workstation and unit (1...n); the station control layer computer monitoring network performs data interaction with the power grid EMS system, the data acquisition system, and the substation measurement, control and protection system through the interval layer data communication network; the The computer monitoring network of the station control layer controls the remote workstation; the data acquisition system collects the data of each unit (1...n) respectively; Wind turbine and wind turbine main control system for data transmission. the 2. The system according to claim 1, wherein the computer monitoring network of the station control layer includes: operator workstations 1, 2, service hosts, service standby machines, five-defense workstations, and protector workstations connected in sequence , management workstation, wind power forecasting workstation, condition monitoring and fault diagnosis workstation, manual analysis terminal, Web server and network printer. the 3. The system according to claim 1, wherein the data communication network at the bay layer comprises: a plurality of communication control units connected in sequence. the 4. The system according to claim 1, characterized in that the communication control unit is a device of model NSC300. the 5 . The system according to claim 1 , wherein the grid EMS system is connected to the bay layer data communication network through a router. 6 . the 6. The system according to claim 1, wherein the data acquisition system includes: a tower impeller information collector and a vibration sensor, an axial piezoelectric sensor and a displacement sensor connected to it respectively; the vibration sensor adopts A vibration sensor whose model is PCB356A15 or PCB352C33; the tower impeller information collector is provided with a data processing board. the 7. The system according to claim 1, wherein the substation measurement, control and protection system includes: a measurement and control device and a third-party intelligent device for transmitting data to the station control layer computer monitoring network respectively. the 8. The system according to claim 7, wherein the third-party smart device is an interface device. the

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