Abstract:
The invention relates to a method (100) for optimising characteristic variable values of characteristic variables (K) in a number of structurally corresponding units of at least one wave energy converter (1), wherein the characteristic variable values can be influenced by non-settable conditions (R) and by settable operating parameters (P), and the method (100) comprises, for at least one of the operating parameters (P), (a) the setting (110) of parameter values, which are each different, for the operating parameter (P) for the number of structurally corresponding units, (b) the determination (120) at least one characteristic variable value for each of one or a plurality of the characteristic values (K) for the number of structurally corresponding units, (c) the determination (130) of those of the number of structurally corresponding units in which at least one of the characteristic variable values of the one or the plurality of characteristic variables (K) comes closest to a definable quality value, and definition of the parameter values set in this unit as intermediate value, (c) the increase (140) of the parameter value for each of the number of structurally corresponding units in which the set parameter value is less than the intermediate value or corresponds to the greatest of the parameter values set in the number of structurally corresponding units and to the intermediate value and reduction (140) of the parameter value for each of the number of structurally corresponding units in which the set parameter value is higher than the intermediate value or corresponds to the smallest of the parameter values set in the number of structurally corresponding units and to the intermediate value, and (d) continuation of the method with step (b). A correspondingly designed control unit (200) likewise forms the subject matter of the invention.
Abstract:
The invention relates to a decision support system (DSS, 1) for maintenance of renewable energy generators, such as wind turbine generator (WTG, 11). A forecasting module (FM, 21) outputs renewable power plant relevant parameters (PF) in a prediction window of time (TW), whereas an optimization module (OPT, 22) receives the relevant parameters (PF),and proposes a maintenance schedule (PROP-MAN) for the renewable power plant (WPP)in order to optimize the produced energy with respect to the demand in said predefined prediction window (TW). A renewable energy generator condition module (WT-CON, 23) outputs condition data into maintenance recommendations (REC-MAN) for one or more renewable energy generators. Finally,a renewable energy generator maintenance recommendation module (WTM, 24) is arranged to combine the proposed maintenance schedule and the maintenance recommendations into a final maintenance decision proposal (FIN-PROP-MAN).The invention changes the traditional concept of reactive and predictive maintenance technique for renewable energy generators, such as wind turbine generators.
Abstract:
A wind turbine power plant comprises a plurality of wind turbines, each having a rated output and under the control of a power plant controller. The power plant also has a rated output which may be over-rated in response to one or more of electricity pricing data, power plant age and operator demand. The power plant controller can send over-rating demand signals to individual turbines. The controllers at the turbines include a fatigue life usage estimator which estimates a measure of the fatigue life consumed by key components of the turbine. If this measure exceeds a target value for any component, over-rating is prevented at that turbine.
Abstract:
Die Erfindung betrifft ein Verfahren zur Ermittlung eines Energieertragsverlustes einer ersten Windenergieanlage (1-49) aus einem Windenergieanlagenpark (51) mit mehreren Windenergieanlagen (1-49). Das erfindungsgemäße Verfahren zeichnet sich dadurch aus, dass die erste Windenergieanlage (1-49) in einem reduzierten Energieertragsbetrieb geführt wird, der außerhalb eines energieoptimierten Normalbetriebs liegt, wobei ein reduzierter Energieertrag der ersten Windenergieanlage (1-49) ermittelt wird, wobei wenigstens eine zweite Windenergieanlage (1-49) nach einem vorgebbaren Kriterium ausgewählt wird oder ist, wobei der Energieertrag der wenigstens einen zweiten Windenergieanlage (1-49) ermittelt wird, wobei in Abhängigkeit des Energieertrags der wenigstens einen zweiten Windenergieanlage (1-49) ein Energieertragspotential der ersten Windenergieanlage (1-49) bestimmt wird und die Differenz des Energieertragspotentials der ersten Windenergieanlage (1-49) und des ermittelten reduzierten Energieertrags gebildet wird.
Abstract:
The application describes a wind turbine having a control method and controller for performing predictive control of a wind turbine generator. Based on the measured instantaneous wind speed, it is known to provide control signals to a wind turbine in order to control the pitch of the wind turbine rotor blades and the speed of the generator. However, it is difficult using instantaneous wind speed measurements to achieve smooth control, due to finite response speeds of the associated electro-mechanical systems, as well as the constantly changing control system inputs. The predictive control system described in the application assumes a model of generator speed based on the values of the incident wind speed v(t) and the values of a control signal u(t) output to the wind turbine in a feed forward loop. Here, the control signal can be for one or more of controlling either the power setting of the generator, or the pitch angle of the rotor blades. The predictive controller uses a rolling time series of values for v(t) and u(t) and based on a predicted response of the generator speed w(t) optimises the time series control signal u(t). The predicted response of the generator speed w(t) is based on model, that can be refined in real time as the wind turbine operates.
Abstract:
Methods and apparatus for a wind power generation system which may include at least one wind responsive turbine; at least one mechanical connection; at least one rotational movement element configured to be responsive to a mechanical connection; at least one coupler which in various embodiments may be coordinated with at least one generator and that may control the generation of an electrical output at a constant generator RPM.
Abstract:
A method for controlling operation of a wind turbine and a method for controlling operation of a plurality of wind turbines positioned in a wind farm are disclosed. According to the method, a pitch and rotational speed curve, e.g. a ? versus ? curve, is selected from a group of pitch and rotational speed curve, and the wind turbine is operated in accordance with the selected curve for a short period, while monitoring at least one target parameter, e.g. power production or loads on one or more components. This is repeated for each of the curves of the group of pitch and rotational speed curves. This is also repeated a predetermined number of times, i.e. each curve is selected in turn a predetermined number of times. Based on the monitored target parameters an optimum curve is determined from the group of pitch and rotational speed curve, and the wind turbine is operated in accordance with this optimum curve. The method ensures that the applied curve is in fact optimal for the specific wind turbine, at the specific site and under the specific conditions. Thereby the wind turbine can be operated in a more optimal manner, e.g. with respect to power production and/or loads or wear on components.
Abstract:
A predictive maintenance system for wind parks, the wind park comprising a group of wind turbines (Ai), a communication network (RS) and a supervision and control system (ST). The predictive maintenance system comprises a monitoring and processing equipment (SMP) connected to the control system (PLC) of the wind turbine (Ai). The SMP gathers data from a group of accelerometers mounted in the wind turbine and sends alarm signals through the PLC to the supervision and control system. The predictive maintenance system of the invention is based on vibration analysis. The invention also refers to a monitoring and processing equipment (SMP) for wind turbines.
Abstract:
본 발명은 풍력발전용 가변발전장치에 관한 것으로서, 상이한 발전용량을 갖는 복수 개의 발전기와 주축의 회전속도에 따라 상기 복수 개의 발전기에 선택적으로 회전력을 인가시키는 동력전달부와 제어부를 포함하여 구성되며, 이러한 구성을 통해 풍속의 변화에 따라 발전량이 가변적으로 조절될 수 있기 때문에 바람의 에너지를 최대한 이용할 수 있어 발전효율이 증대됨과 함께, 주축의 회전속도가 풍속에 따라 제어되기 때문에 예상치못한 태풍이나 돌풍 시에도 과도한 회전으로 인한 장치의 파손을 예방할 수 있음과 아울러 계속적으로 발전을 할 수 있는 효과를 갖는다. 또한, 나셀에 설치되는 상부 발전기와 지면에 설치되는 하부발전기와 수평축의 회전속도에 따라 회전력을 선택적으로 수직축에 인가시키는 동력전달부와 동력제어부를 포함하여 구성되며, 이러한 구성을 통해 타워에 가해지는 하중을 균등화 및 최소화하여 설치비용을 대폭 절감시킴과 함께 풍력의 크기에 따라 상부발전기와 하부발전기가 가변적으로 발전을 할 수 있도록 하여 발전량을 극대화할 수 있는 효과를 갖는다.