WO2014207529A1 - Protection électrostatique de détecteurs - Google Patents

Protection électrostatique de détecteurs Download PDF

Info

Publication number
WO2014207529A1
WO2014207529A1 PCT/IB2014/001116 IB2014001116W WO2014207529A1 WO 2014207529 A1 WO2014207529 A1 WO 2014207529A1 IB 2014001116 W IB2014001116 W IB 2014001116W WO 2014207529 A1 WO2014207529 A1 WO 2014207529A1
Authority
WO
WIPO (PCT)
Prior art keywords
shielding box
insulation plate
wind turbine
sensing system
shielded sensing
Prior art date
Application number
PCT/IB2014/001116
Other languages
English (en)
Inventor
Ashish Bhimrao KHARKAR
Omprakash Ganpatrao Kulkarni
Yogesh Jogindernath MEHRA
Original Assignee
Kharkar Ashish Bhimrao
Omprakash Ganpatrao Kulkarni
Mehra Yogesh Jogindernath
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kharkar Ashish Bhimrao, Omprakash Ganpatrao Kulkarni, Mehra Yogesh Jogindernath filed Critical Kharkar Ashish Bhimrao
Publication of WO2014207529A1 publication Critical patent/WO2014207529A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/069—Protection against electromagnetic or electrostatic interferences

Definitions

  • the present subject matter is related, in general, to shielded sensing systems and, in particular, to shielded sensing systems for wind turbines.
  • Fig. 1 illustrates a schematic side view of a wind turbine according to an embodiment of the present subject matter.
  • FIG. 2a illustrates a cross-sectional view of a shielded sensing system, according to an embodiment of the present subject matter.
  • FIG. 2b illustrates a perspective view of the shielded sensing system, according to an embodiment of the present subject matter.
  • FIG. 2b illustrates a perspective view of the shielded sensing system, according to an embodiment of the present subject matter.
  • the subject matter described herein relates to a shielded sensing system for a wind turbine, according to an embodiment of the present subject matter.
  • Wind energy being one of the renewable energy resources, has gained popularity as an alternative renewable power source for electricity generation. Consequently, frequent developments are emerging in the wind energy realm aiming towards improving overall efficiency of power generation.
  • a wind turbine includes a tower, a nacelle located on the tower, a rotor hub connected to the nacelle by means of a rotating shaft, and rotor blades mounted on the rotor hub.
  • the rotor blades of the wind turbine are normally exposed to large dynamic mechanical loads, in particular, when the wind turbine is operated in turbulent wind conditions, for example, during high wind shear.
  • Such mechanical loads on the wind turbine if not determined, can damage components, for example, stator ring of stator mounted inside the nacelle, of the wind turbines.
  • the deflection in the wind turbine can be measured by using sensors along with a signal conditioned amplifier control system.
  • the sensors can be a torque monitoring sensor, a strain gauge, an accelerometer, or the like.
  • the sensors are normally installed either on the rotor blade or on the tower of the wind turbine.
  • such mounted sensors are difficult to maintain, replace, or service, as well as prone to lightning strikes, dirt build-up, rain, and other atmospheric effects.
  • the shielded sensing system includes a shielding box having a sensor that measures at least one parameter, for example, torque acting on a stator ring of the wind turbine.
  • a torque monitoring sensor may be utilized to measure the at least one parameter to determine torsional and linear forces exerted on the wind turbine.
  • Strain gauge, Accelerometer, Vibrating wire type vibration sensor, Piezo Electric vibration sensor, Electro-Magnetic vibration sensor, Opto-electric vibration sensor (including LASER based) or the like can be utilized as the torque monitoring sensor to measure the at least one parameter.
  • the shielding box has a cover.
  • the cover is provided as a top portion of the shielding box and is connected to the shielded box in a press-fit manner.
  • the shielding box and the cover are made from conductive material to provide electro-static shielding to the sensor.
  • the shielding box made from conductive material has high shielding effect to protect the sensor against electro-static waves effect, and can operate on -25° C to +140° C.
  • the shielding box made from conductive material has the capability to withstand adverse climatic and physical conditions viz. high relative humidity, saline condition, extreme high and low temperatures, dusty, vibrations, jerks, etc.
  • the shielding box made from conductive material has no adverse effect on calibration or reliability of the sensor.
  • the conductive material can be cast aluminium.
  • an electro-static field created due to static charging of the rotor blade or lightning strike impacting on the wind turbine may lead to generation of radiation of an electro-static waves effect resulting into malfunctioning or physical damaging of the sensor.
  • the shielded sensing system includes an insulation plate, made from Teflon, provided between a base portion of the shielding box and a component of the wind turbine.
  • the component of the wind turbine can be a stator ring of a stator mounted inside a nacelle of the wind turbine.
  • the senor is placed on the base portion of the shielding box.
  • the sensor is placed on an insulation plate disposed inside the shielding box on the base portion of the shielding box.
  • the insulation plate disposed in the shielding box provides electrical high voltage isolation to the sensor mounted on the insulation plate from metallic component of the wind turbine.
  • the sensor may not be damaged by the electro-static field created due to static charging of the rotor blade or by the lightning strike impacting on the wind turbine. As a consequence, undesired shutdown of the wind turbine is reduced and thus energy generation losses are also reduced.
  • FIG. 1 illustrates a schematic side view of a wind turbine 100 according to an embodiment of the present subject matter.
  • the wind turbine 100 in one example, includes two rotor blades 102, but may include more or less rotor blades 102 according to other embodiments.
  • the rotor blades 102 are mounted on a rotor hub 104, which is in turn rotatably connected to a nacelle 106.
  • the nacelle 106 is mounted on top of a tower 108 of the wind turbine 100.
  • the nacelle 106 is equipped with a stator (not shown) having a stator ring 1 10, which may include, for example, a shielded sensing system 1 12 for measuring at least one parameter, for example torque acting on the wind turbine 100.
  • a shielded sensing system 1 12 for measuring at least one parameter, for example torque acting on the wind turbine 100.
  • a precise knowledge of the torque acting on the wind turbine 100 may be useful for operating the wind turbine 100 in an appropriate manner.
  • a strain gauge may be implemented as a torque monitoring sensor in the shielded sensing system 1 12 to measure the strains or loads on the wind turbine 100.
  • the rotor blades 102 of the wind turbine 100 are subject to considerable forces and moments due to wind load, gravitation, and centrifugal force. Such forces and moments on the rotor blades 102 are typically proportional to a stretching or bending of the stator ring 1 12 which can be measured by the strain gauge.
  • the strain gauge may be realized as flat electrical resistors. The resistance of those flat resistors changes linearly to length variations of the strain gauge.
  • the strain gauge are bonded or glued onto a surface a component of the wind turbine being tested. The strain gauge may measure small relative length variations, as small as 10 ⁇ 6 mm.
  • a fundamental parameter of the strain gauge is its sensitivity to strain, expressed quantitatively as the gauge factor (GF).
  • the gauge factor (GF) is defined as a ratio of relative change in electrical resistance (AR/R) to a strain which is a relative change in length (AL/L) of the strain / gauge.
  • the gauge factor (GF) is typically about 2.
  • strain measurements seldom involve strains larger than 10 ⁇ 3 mm. Therefore, typically, electrical resistance changes smaller than 1 ⁇ are to be measured by the strain gauge.
  • Fig. 2a illustrates a cross-sectional representation of the shielded sensing system 1 12
  • Fig. 2b illustrates a perspective view of the shielded sensing system 1 12, in accordance with an embodiment of the present subject matter.
  • the shielded sensing system 1 12 includes a torque monitoring sensor 202 to measure at least one parameter, for example, a torque acting on the stator ring 1 10 of the wind turbine 100.
  • the torque monitoring sensor 202 is connected to a signal conditioned amplifier control system (not shown) for measurement of signals provided by the torque monitoring sensor 202 and for taking preventive action associated with the safety objective along with other electrically or electronically sensitive systems (not shown).
  • the signal conditioned amplifier control system constantly monitors the torque monitoring sensor 202 and stops the operation of the wind turbine 100 when a torque measured by the torque monitoring sensor 202 is above a limit value.
  • the limit value of the torque impacting on the wind turbine 100 can be more than 5 oscillations per second with a frequency of more than 6 Hz.
  • the torque monitoring sensor 202 is required to be shielded from the electro-static field created due to static charging of the rotor blade 102 or from the lightning strike impacting on the wind turbine 100.
  • the torque monitoring sensor 202 may be implemented in the shielded sensing system 1 12 to measure the strains or loads on the wind turbine 100.
  • the shielded sensing system 1 12 includes a shielding box 204.
  • the shielding box 204 is made from conductive material.
  • the shielding box 204 made from conductive material is capable to withstand various adverse climatic and physical condition viz. high relative humidity, saline condition, extreme high and low temperatures, dusty, vibrations, jerk conditions, etc. Further, the shielding box 204 made from conductive material can operate on -25° C to +140 ° C or even higher temperature band.
  • the shielding box 204 made from conductive material is connected to earthling or ground, so that the shielding box 204 has no adverse effect on calibration or reliability of a torque monitoring sensor 202.
  • the conductive material can be cast aluminium, as the shielding box made from cast aluminum box could have light weight and can be easy to installation in the wind turbine 100 to provide electro-static shielding.
  • the shielding box 204 includes a plurality of walls 206, a base portion 208, and a cover 210 provided as a top portion.
  • the cover 210 is a removable portion and is connected to the plurality of walls 206 in a press-fit manner.
  • recesses 212a, 212b, 212c, and 212d are provided at each corner of the shielding box 204, as can be seen in Fig. 2b.
  • the thickness of the plurality of walls 206 is more in the regions of the recesses 212a, 212b, 212c, and 212d in comparison to the other regions for additional strength.
  • the cover 210 is also made from cast aluminium to provide electro-static shielding to the torque monitoring sensor 202.
  • the shielding box 204 has an insulation plate 214a, 214b, collectively referred to as an insulation plate 214 in the description hereinafter. Further, in one implementation, the insulation plate 214 is made from Teflon. Further, the insulation plate 214 has a first insulation plate 214a with thickness of 15 mm inside the shielding box 204 and has a second insulation plate 214b with thickness of 20 mm outside the shielding box 204.
  • the first insulation plate 214a is mounted over the base portion 208 of the shielding box 204 inside the shielding box 204.
  • the torque monitoring sensor 202 is placed or mounted inside the shielding box 204 to measure the torque or stress on the structural and related parts of the wind turbine 100.
  • the first insulation plate 214a may be made up of a material suitable to withstand minimum 100 kV.
  • the first insulation plate 214a can be made from Teflon and provides electrical high voltage isolation to the torque monitoring sensor 202 mounted on the first insulation plate 214a.
  • the torque monitoring sensor 202 itself is protected from damage during the adverse climate condition from lightning strikes and static charges in the rotor blades 102 of the wind turbine 100. As a consequence, undesired shutdown of the wind turbine is reduced and thus energy generation losses are also reduced.
  • the second insulation plate 214b is placed outside the shielding box 204.
  • the second insulation plate 214b is provided as an independent module between the base portion 208 and a component, for example, stator ring 1 10, of the wind turbine 100.
  • the first insulation plate 214a and the second insulation plate 214b include a plurality of insulator openings 216a, 216b, and 216c.
  • mounting bolts 218a and 218b are fastened to facilitate mounting of the torque monitoring sensor 202 on the first insulation plate 214a and mounting of the first insulation plate 214a and the second insulation plate 214b on the shielding box 204.
  • the torque monitoring sensor 202 is mounted on the first insulation plate 214a of the insulation plate 214.
  • the first insulation plate 214a along with the torque monitoring sensor 202 is mounted inside the shielding box 204 on the base portion 208 of the shielding box 204.
  • the second insulation plate 214b is mounted outside the shielding box 204 on the base portion 208 of the shielding box 204.
  • the second insulation plate 214b along with the shielding box 204 is mounted on the component of the wind turbine 100.
  • an opening 220 is provided in one of the plurality of walls 206, for providing electrical and/or communication connection to the torque monitoring sensor 202 mounted inside the shielded sensing system 1 12.
  • the shielded sensing system 1 12 along with the torque monitoring sensor 202 can be mounted at any suitable measurement point on the wind turbine 100.
  • the electro-static field waves effect created due to electrostatic charging of the rotor blades 102 or lighting strike impacting on the wind turbine 100 can induce very high load on the wind turbine 100, and as a result, vibrations on stator (not shown) mounted inside the nacelle 106.
  • the stator ring 1 10 of the stator is fitted with the torque monitoring sensor 202 in accordance in an implementation of the present subject matter.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Wind Motors (AREA)

Abstract

La présente invention concerne un système de détection protégé (112) monté sur un élément d'une éolienne (100). Le système de détection protégé (112) comprend un boîtier de protection (204) comprenant un couvercle (210), le boîtier de protection (204) et le couvercle (210) étant composés d'un matériau conducteur. Le système de détection protégé (112) comprend en outre une plaque d'isolation (214) comprenant une première plaque d'isolation (214a) disposée à l'intérieur du boîtier de protection (204) sur une partie de base (208) du boîtier de protection (204) et comprenant une seconde plaque d'isolation (214b) disposée à l'extérieur du boîtier de protection (204) entre la partie de base (208) du boîtier de protection (204) et l'élément de l'éolienne (100). Sur la première plaque d'isolation (214a), un détecteur de contrôle de couple (202) est monté à l'intérieur du boîtier de protection (204).
PCT/IB2014/001116 2013-06-28 2014-06-19 Protection électrostatique de détecteurs WO2014207529A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2207/MUM/2013 2013-06-28
IN2207MU2013 IN2013MU02207A (fr) 2013-06-28 2014-06-19

Publications (1)

Publication Number Publication Date
WO2014207529A1 true WO2014207529A1 (fr) 2014-12-31

Family

ID=51211810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/001116 WO2014207529A1 (fr) 2013-06-28 2014-06-19 Protection électrostatique de détecteurs

Country Status (2)

Country Link
IN (1) IN2013MU02207A (fr)
WO (1) WO2014207529A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107885151A (zh) * 2017-12-20 2018-04-06 江苏精微特电子股份有限公司 一种具有防静电绝缘效果好的多功能传感器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413527A (en) * 1981-04-14 1983-11-08 Nippondenso Co., Ltd. Semiconductor pressure sensor
EP1887599A1 (fr) * 2005-06-01 2008-02-13 Surpass Industry Co., Ltd. Interrupteur de pression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413527A (en) * 1981-04-14 1983-11-08 Nippondenso Co., Ltd. Semiconductor pressure sensor
EP1887599A1 (fr) * 2005-06-01 2008-02-13 Surpass Industry Co., Ltd. Interrupteur de pression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107885151A (zh) * 2017-12-20 2018-04-06 江苏精微特电子股份有限公司 一种具有防静电绝缘效果好的多功能传感器

Also Published As

Publication number Publication date
IN2013MU02207A (fr) 2015-06-12

Similar Documents

Publication Publication Date Title
US20110158806A1 (en) Wind Turbines and Other Rotating Structures with Instrumented Load-Sensor Bolts or Instrumented Load-Sensor Blades
US8170810B2 (en) Method for monitoring the load on rotor blades of wind energy installations
CN101037986B (zh) 用于风力涡轮的转子
US20090232635A1 (en) Independent sensing system for wind turbines
CN106980030B (zh) 风力机机舱集成式风速风向测量装置及方法
EP2166222B1 (fr) Éolienne comprenant un dispositif de contrôle des vibrations
US20110285129A1 (en) wind turbine and a method for monitoring a wind turbine
US20070041834A1 (en) Device For Detecting Damage Of A Wind Energy Turbine Rotor Blade Due To A Lightning Strike
EP2195527A2 (fr) Surveillance de fréquences de pale d'une éolienne
CN112219029B (zh) 用于风力涡轮机的传感器装置
US20120025528A1 (en) Magnetostrictive sensor system and method
KR101358397B1 (ko) 가속도 센서 및 출력 전력에 기반하는 풍력 발전기의 고장진단장치 및 고장 진단 방법
CN106338384B (zh) 一种风力发电机组叶片全展向载荷测量方法
CN103245913A (zh) 大型发电机组次同步振荡信号检测与分析的方法及系统
US8129979B2 (en) Arrangement for lightning detection at a wind turbine
WO2014207529A1 (fr) Protection électrostatique de détecteurs
EP2659242B1 (fr) Système et methode pour générateur d'éolienne
CN113394919B (zh) 风力发电机气隙监测系统及风力发电机组
CN108691727B (zh) 一种风力机导流罩
KR20170014343A (ko) 기상 관측 장치
WO2019129337A1 (fr) Système de surveillance de déplacement de pale d'éolienne et procédé de surveillance de déplacement de pale d'éolienne
CN102914360A (zh) 冗余型风电机组振动监测装置及监测方法
CN109667726B (zh) 风力发电机风轮转速测量结构、装置及风力发电机组
KR20210033202A (ko) 산업 기계/설비 고장 예측 시스템
LU503776B1 (en) A method and system for monitoring the state of the blade

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14741663

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14741663

Country of ref document: EP

Kind code of ref document: A1