Measurement and Control Solutions for the Wind Power Industry

【Wind Power Plants】In wind power plants, the kinetic energy of the wind is converted into electrical energy. The rotor captures this kinetic energy and transfers it to a generator to produce current. Systems without gearboxes differ from those with variable gearboxes; the latter matches the rotor's wind speed to the generator's constant operating speed. The generated electricity is transmitted to the grid via a substation. Wind power plants are complex technical systems requiring diverse monitoring tasks. Whether located in coastal or inland areas, JUMO provides products that ensure stable operation. Beyond our extensive product line for measuring temperature, pressure, and humidity, we offer specialized expertise, years of practical experience in wind turbine sensor systems, and comprehensive measurement and control system components. 【Rotor Blade Manufacturing】Rotor blades are primarily composed of epoxy resin fiber laminates or fiberglass laminates, manufactured using vacuum infusion. Fabric mats laid in molds are impregnated with resin under vacuum and then heated in a controlled manner until saturated. Due to the large size of blade molds, numerous temperature control circuits are required. The JUMO mTRON T system handles various scenarios with an appropriate number of temperature probes. Ideally, these probes connect digitally to the controller via CANopen or IO-Link, optimizing wiring. Electric heat generation is managed by JUMO TYA series power controllers, which interface with the JUMO mTRON T system via system bus. 【Rotor and Pitch System】Pressure in the pitch system's hydraulic circuit is measured by the JUMO CANtrans p pressure transmitter, while temperature is monitored using screwed-in resistance thermometers. To prevent ice accumulation on rotor blades—which can cause debris shedding or unbalanced cyclic loads—JUMO surface-mount or insertion-type temperature probes measure blade temperatures. These rugged probes withstand harsh weather and wind conditions, determining whether blade heating is activated. If necessary, blades are heated with hot air to prevent icing. Blade heaters are monitored and protected by safety thermostats or temperature switches (JUMO heatTHERM panel-mounted switch, model 602031). Compatible components include JUMO surface-mount RTDs (model 902550, with CANopen output, model 402055), JUMO insertion-type RTDs with cables (model 902153), JUMO plastoSENS T02 with cables (model 904002), JUMO dTRANS T1000 temperature sensors with IO-Link (model 902915), and JUMO screwed-in RTDs (model 902030/80). 【Nacelle Climate Control】Humidity and temperature sensors monitor nacelle conditions to prevent corrosion. To avoid potential freezing of heat exchangers, temperature is monitored via insertion-type RTDs. To prevent floor temperatures from dropping below the dew point, surface RTDs embedded in heating plates measure the floor temperature. Temperature and pressure sensors monitor filters and ventilation systems that dissipate heat from the nacelle and control cabinets. Flow sensors monitor coolant, oil, and other liquids for flow rates and leaks. 【Tower Climate Control】Significant physical forces act on the tower, supporting the entire nacelle weight. Beyond structural requirements, the tower interior must maintain specific temperature and humidity levels to prevent moisture accumulation and subsequent corrosion damage. 【Gearbox】In wind farms with gearboxes, the rotor speed driven by the wind is adjusted to match the connected generator's rotational speed. Massive loads on gearbox teeth are managed through sophisticated lubrication technology, making reliable measurements of oil pressure, temperature, and level critical. Large gearbox temperatures are measured using insertion or screwed-in resistance thermometer probes (variable lengths). Probes feature spring-loaded tips or screw connections with springs to compensate for thermal expansion or manufacturing tolerances, ensuring optimal thermal contact. The latest versions support 4~2 mA two-wire outputs, CANopen, or IO-Link. JUMO NESOS float switches measure point-level oil levels in hydraulic and gearbox systems; as a special feature, they also provide an additional temperature switch. 【Generator】Temperature monitoring is required in systems with or without adjustable gearboxes. In systems without gearboxes, internal temperatures must be continuously monitored to prevent generator overload. For temperature measurement, temperature sensors with connecting wires are integrated into the pole shoes during generator operation. In non-gearbox systems, these sensors are mounted on the rotor; the front ring-shaped housing serves as the stator, where several Pt100 temperature sensors are inserted into castings between the three-phase windings. In wind farms with adjustable gearboxes, generators are housed within the nacelle, utilizing the same sensors. Compatible components include JUMO bimetallic temperature switches (model 608301), JUMO platinum chip sensors (compliant with DIN EN 60751, model 906121), JUMO insertion-type RTDs with cables (model 902153), and JUMO plastoSENS T01 with cables (model 904001). 【Braking System】The braking system is monitored using the JUMO MIDAS H20 HP high-pressure transmitter. During operation, deceleration is achieved by adjusting the rotor blade pitch angle. For safety, emergency stops, manual shutdowns, and maintenance/repair work, the drive shaft can also be stopped via disc brakes monitored by pressure. This transmitter features a mechanical, highly elastic measurement system using membrane technology. Its wide measurement range combined with a compact design ensures outstanding performance in applications. 【Substation】To prevent overheating, heat generated by transformer power losses must be dissipated externally via air conditioning. Oil temperature for cooling and insulation is monitored using screwed-in RTDs or electrical contact thermometers with narrow-tipped protective sheaths. Humidity control is also vital for safe substation operation. The 907032 type humidity sensor is ideal for simple two-state relative humidity control; it requires no separate power supply and is virtually maintenance-free due to specially prepared plastic fibers. 【IO-Link Sensor Innovation】The JUMO dTRANS T1000 and JUMO dTRANS p35 are IO-Link sensors for temperature and pressure measurement. Advanced condition monitoring is now a standard requirement for modern wind power plants. The latest JUMO temperature and pressure sensors with IO-Link provide deep insights into sensor-level diagnostic data. This improves plant efficiency and enhances safety through continuous checks of sensor availability. Sensors can be quickly and easily replaced during routine maintenance because necessary data is automatically transferred from higher-level systems. Customer benefits include: optimized production processes through communication with the shop floor; reduced installation and commissioning time; increased diagnostic depth due to full transparency down to the sensor level; reduced maintenance and service costs with increased plant availability; long service life, high accuracy, and process reliability; and flexible usage thanks to compact designs and various process connections. 【Wtrans Wireless Measurement】The JUMO Wtrans series is a sensor system leveraging cutting-edge wireless technology, offering new possibilities for recording values from moving and stationary components. Measured values are initially transmitted to the JUMO Wtrans receiver, where signals can be passed in digital or analog form for further processing, control, automation, display, and recording. Customer benefits include: wireless acquisition of values from movable parts or hard-to-reach areas; suitability for permanent installation or temporary spontaneous measurements; complete spatial mobility (outdoor range up to 300 meters); unlimited flexibility as temporary measurements require no time-consuming installation or commissioning; fail-safe, industrial-standard data transmission with high process reliability; reduced installation work; lower costs for reinstallation, maintenance, and repair; optional online charting to record values directly on a PC; and easy connection to other devices for data evaluation. 【plastoSENS Plastic-Encapsulated Temperature Measurement】JUMO plastoSENS T products may resemble traditional temperature probes but represent an innovation in probe manufacturing. New thermoplastics offer nearly infinite possibilities for diverse installation scenarios and probe performance; for instance, conductive and non-conductive plastics can be combined to improve response times and reduce conduction errors. Plastic-encapsulated sensors solve vibration issues for rotating components like motors, gearboxes, and generators. Placing conventional probes in vibration-resistant locations can be cumbersome, whereas JUMO plastoSENS T02 can withstand even extreme vibrations. Regarding custom development, the freedom of design and thermoplastic composition gives customers a competitive edge; the development process can be tailored individually to needs. Since simulation software allows modeling the thermal characteristics of new designs, concepts can be realized quickly and cost-effectively. Customer benefits include: geometrically free design with almost any shape possible; application-specific thermoplastic compositions; selectable sensor types (e.g., SMD, NTC, PTC, Pt); temperature range -50°C~+200°C; software-supported development processes customized to requirements; and vibration-resistant, voltage-proof, steam-sealed, surface-optimized temperature probes. 【NESOS Point and Level Measurement】JUMO has produced high-quality floats for over 40 years. Combined with equally mature measurement technology, this forms the core of JUMO NESOS point and level measurement. Floats with integrated magnetic switches activate one or more reed contacts via their magnetic field as the liquid level rises or falls. Thus, switching occurs without auxiliary energy while maintaining contactless and wear-free operation. Additionally, temperature switches and Pt100 or Pt1000 temperature sensors can be installed. Customer benefits include: wear-free and maintenance-free operation; suitable for small measurement ranges (e.g., fuel tanks); independence from tank geometry and medium properties; simple setup and installation; quick inspection during maintenance; optional Pt100 or Pt1000 temperature sensors and temperature switches; and customizable solutions. 【JUMO Automation】JUMO Automation (Dalian) Co., Ltd. is JUMO's production and sales entity in China. Contact us at 0411-87189010 (Phone), 0411-87189020 (Fax), located at No. 41 Shengming 2nd Road, Double D Port, Jinzhou New District, Dalian. We also have offices in Shanghai (Room 650, Building 6, Debi Yi Garden, No. 1189 Wuzhong Road, Minhang District; Phone 021-60914866), Qingdao (Room 908, Software Building, No. 172 Minjiang Road, Shinan District; Phone 0532-85969549), Beijing (Room 7012, Huihe Nanjie Siwei Building, Tonghui River side, Chaoyang District; Phone 010-59798268), Guangzhou (Rooms 810-811, Building A, Cairun International Building, No. 2 Dongguanzhuang Road, Tianhe District; Phone 020-38847139), and Chengdu (Room 1806, Kehua Tiancheng Building, No. 139 Kehua Middle Road, Wuhou District; Phone 028-87791722). We provide selection, supply, and technical service support for wind power projects.

Use Cases:Suitable for blade vacuum infusion curing workshops, rotor and pitch hydraulic systems, nacelle and tower internal environments, gearbox lubrication and hydraulic circuits, direct-drive and geared generators, disc brake systems, and substation transformer areas in onshore and offshore wind farms.