I. Brief introduction of wind power control system
The wind power control system includes an on-site wind turbine control unit, a high-speed ring-type redundant fiber-optic Ethernet, and a remote host computer operator station. The on-site wind turbine control unit is the core of each fan control, which realizes the functions of unit parameter monitoring, automatic power generation control and equipment protection; each wind turbine is equipped with an in-situ HMI human-machine interface for local operation, commissioning and Maintenance unit; high-speed ring-type redundant fiber-optic Ethernet is the system's data highway, which sends the unit's real-time data to the host computer interface; the host computer operator station is the operation monitoring core of the wind power plant, and has complete unit status monitoring, Parameter alarm, real-time/historical data recording and other functions, the operator realizes the operation monitoring and operation of the wind group organic group in the control room.
The Wind Turbine Control Unit (WPCU) is the control core of each wind turbine and is distributed in the tower and nacelle of the unit. Due to the harsh operating environment of the wind turbine, the reliability requirements of the control system are very high, and the wind power control system is designed for the operation requirements of large wind farms. It should have high environmental adaptability and anti-electromagnetic interference capability. The system structure is as follows:
The field control station of the wind power control system includes: the tower main controller cabinet, the cabin control station cabinet, the pitch system, the converter system, the on-site touch screen station, the Ethernet switch, the fieldbus communication network, the UPS power supply, and the emergency shutdown backup system. Wait. The network structure of the wind power control system is shown in Figure 1:
1. Tower Control Station The tower control station, that is, the main controller cabinet, is the core of wind turbine equipment control, including controllers and I/O modules. The controller hardware uses a 32-bit processor, and the system software uses a strong real-time operating system. The various types of complex master control logic of the running unit communicate with the cabin controller cabinet, the pitch system, and the converter system through the field bus. In order to make the unit run at its best.
The configuration of the controller adopts a configuration function with rich functions and friendly interface, and adopts the configuration method conforming to the IEC61131-3 standard, including: function diagram (FBD), instruction list (LD), sequential function block (SFC), ladder diagram. , structured text and other configuration methods.
2. The engine room control station of the engine room control station collects the temperature, pressure, speed and environmental parameters measured by the unit's sensors. It communicates with the main control station of the unit through the field bus. The main controller controls the frame through the engine room to realize the yaw and solution of the unit. Cable and other functions, in addition to the various auxiliary motors, oil pumps, fans in the cabin to control the unit to work optimally.
3, variable pitch system Large wind turbines above MW level usually use hydraulic pitch system or electric pitch system. The pitch system is controlled by the front controller to the pitch drive of the three fan blades. It is the execution unit of the main controller. It communicates with the main controller using CANOPEN to adjust the pitch of the three blades to work optimally. status. The pitch system has a backup power system and safety chain protection to ensure emergency shutdown in critical conditions.
4. Converter system Large-scale wind turbines currently use high-power converters to realize the transformation of power generation. The converter system communicates with the main controller through the fieldbus to realize the unit's speed, active power and reactive power. Power adjustment.
5. On-site touch screen station The on-site touch screen station is the local operation station for unit monitoring, which realizes the local parameters setting, equipment debugging and maintenance functions of the wind turbine. It is the on-site host computer operator station of the unit control system.
6, Ethernet switch (HUB)
The system uses industrial Ethernet switches to connect the controller of a single unit, the touch screen of the field, and the network of the remote control center. The on-site cabinet is connected by a common twisted pair cable, and the remote control room upper computer is connected by an optical cable.
7. Field Communication Network The main controller has various types of field bus interfaces such as CANOPEN, PROFIBUS, MODBUS, Ethernet, etc., which can be configured according to the actual needs of the project.
8. UPS power supply UPS power supply is used to ensure the power supply of the unit control system, critical protection system and related execution units in the case of external power failure.
9. Backup critical safety chain system The backup critical safety chain system is independent of the hardware protection measures of the computer system. Even if the control system is abnormal, it will not affect the normal operation of the safety chain. The safety chain is an emergency circuit that connects the abnormal faults that may cause fatal damage to the wind turbine. When the safety chain is activated, it will cause an emergency shutdown and the unit will be disconnected from the network to ensure the safety of the unit to the utmost.
All wind turbines are connected to the upper computer operator station of the main control room through fiber optic Ethernet to realize remote monitoring of the entire wind farm. The upper computer monitoring software should have the following functions:
1 The system has a friendly control interface. When preparing the monitoring software, fully consider the requirements of wind farm operation management, use the Chinese menu to make the operation simple, and provide convenience for the management of the wind farm as much as possible.
2 The system displays the operation data of each unit, such as the instantaneous power generation, cumulative power generation, power generation hours, wind turbine and motor speed, wind speed, wind direction, etc. of each unit, and transfers the data of the lower unit to the upper computer. It is displayed on the display and can be visually displayed in the form of a curve or a chart if necessary.
3 The system displays the operating status of each wind turbine, such as starting, stopping, steering, hand/automatic control, and large/small generator operation. The status of each wind farm is known through the status of each wind turbine.
4 The system can display the faults that occurred during the operation of each unit in time. When the fault is displayed, the type of fault and the time of occurrence can be displayed, so that the operator can handle and eliminate the fault in time to ensure the safety and continuous operation of the wind turbine.
5 The system can achieve centralized control of the wind turbine. In the centralized control room, the duty officer can change the setting state and control the lower position machine only by operating the corresponding key indicating a certain function. Such as power on, stop and left and right direction. However, such operations have certain authority to ensure the safe operation of the entire wind farm.
6 system management. The monitoring software has the function of timed printing and manual instant printing of running data and automatic fault recording to check the history of wind farm operation at any time.
PRODUCT NEAME: Zinc Phosphate Zinc Orthophosphate /zinc orthphosphate
PRODUCT TYPE:Anti-corrosion Pigment
PRODUCT APPREANCE:White powder
CHEMICAL CALSS: Zn3(PO4)2·2H2O
CAS No．7779-90-0
PRODUCT APPLICATION: Zinc phosphate helps the formation of passivation layer on the metal surface to be protected. Material for anti-corrosion paint used in container, ship and steel structures.Also for electronic materials
TECHNICAL DATA
|
Item |
0-level |
Superfine |
High zinc containing |
High purity |
EPMC |
Tetrahyderate |
|
Appearance |
White powder |
|||||
|
Whiteness% |
80-90 |
80-90 |
80-90 |
85-90 |
95min |
95min |
|
Zn% |
45min |
45min |
50.5-52 |
45min |
45min |
48-52 |
|
PO4% |
20-30 |
20-30 |
20-30 |
40-46 |
43-47 |
46-50 |
|
PH% |
6-7 |
6-7 |
6-7 |
6-7 |
5-7 |
5.5-7 |
|
Oil absorption |
30±5 |
30±5 |
30±5 |
30±5 |
30±5 |
30±5 |
|
Moisture% |
≤1.5 |
≤1.5 |
≤1.5 |
≤1.5 |
≤1.5 |
≤15.7 |
|
Residueon sieve% 325-1250mesh |
≤0.5 |
≤0.5 |
≤0.5 |
≤0.5 |
≤0.5 |
≤0.5 |
|
Cr % |
-- |
-- |
-- |
-- |
≤0.003 |
≤0.003 |
|
Cd % |
-- |
-- |
-- |
-- |
≤0.003 |
≤0.003 |
|
Pb % |
-- |
-- |
-- |
-- |
≤0.005 |
≤0.01 |
|
Standard |
Q/84XS02-2004 |
|||||
STANDARD PACKAGING 25kg/bag, Plastic-lined woven bag or Composite paper bag
TRANSPORT AND STORAGE
Protect against weathering. Store in a dry place and avoid extreme fluctuations in temperature. Special conditions for opened packaging: Close bags after use to prevent the absorption of moisture and contamination
SAFETY
The product is not classified as dangerous under the relevant EC directives and corresponding national regulations valid in the individual EU member states. It is not dangerous according to transport regulations.
In countries outside the EU, compliance with the respective national legislation concerning the classification, packaging, labeling and transport of dangerous substances must be ensured.
The information contained in the safety data sheet should be observed.This contains information on handing, product safety and ecology.
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Zinc Phosphate Series
High-Purity Zinc Phosphate,Antirust Pigment Zinc Phosphate,White Pigment Zinc Phosphate,Zinc Orthophosphate,Tribasic Zinc Phosphate,Zinc Phosphate Primer,Zinc Phosphate Paint
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