公开(公告)号：WO2014202077A1

公开(公告)日：2014-12-24

申请号：PCT/DK2013/050199

申请日：2013-06-18

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： GUPTA, Amit Kumar ,  GUPTA, Manoj ,  GURU, Dilip Kumar

IPC: H02M1/12 ,  H02J3/01

CPC classification number: H02J3/01 ,  G01R19/0092 ,  G01R27/02 ,  H02J3/1842 ,  H02J3/382 ,  H02J3/383 ,  H02J3/386 ,  H02M1/12 ,  H02M7/44 ,  Y02E10/763 ,  Y02E40/22

Abstract: The invention relates to a control system for compensating undesired electrical harmonics on an electrical grid. Part of the control system referred to as a harmonic compensator is operatively connected with a power inverter of a power producing unit supplying power to the grid. Another part of the control system, referred to as an impedance detector, is operatively connected to a point of coupling to which point one or more power producing units are connected. The impedance detector is configured to scan impedances as a function of frequency to identify frequencies of impedance peaks which peaks are indicative of resonance frequencies. The determined resonance frequencies are supplied to one or more the harmonic compensators. A compensator determines control signals to the inverter which causes the inverter to inject compensation currents to the grid which currents will damp currents oscillating at or close to the determined resonance frequency.

Abstract translation: 本发明涉及一种用于补偿电网上不需要的电谐波的控制系统。 被称为谐波补偿器的控制系统的一部分与向电网供电的发电单元的电力逆变器可操作地连接。 称为阻抗检测器的控制系统的另一部分可操作地连接到连接点，一个或多个功率产生单元连接到该点。 阻抗检测器被配置为扫描作为频率的函数的阻抗，以识别峰值指示谐振频率的阻抗峰值的频率。 确定的谐振频率被提供给一个或多个谐波补偿器。 补偿器确定到逆变器的控制信号，使逆变器向电网注入补偿电流，电流将阻尼在或接近所确定的谐振频率振荡的电流。

公开(公告)号：WO2015058769A1

公开(公告)日：2015-04-30

申请号：PCT/DK2014/050306

申请日：2014-09-26

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： GUPTA, Manoj ,  GUPTA, Amit Kumar ,  GURU, Dilip Kumar

IPC: H02H7/30 ,  F03D7/02 ,  F03D7/04 ,  F03D9/00 ,  F03D11/00 ,  H02J3/12 ,  H02J3/16 ,  H02J3/24 ,  H02J3/38 ,  H02P9/00

CPC classification number: F03D7/048 ,  F03D7/0284 ,  F03D7/043 ,  F03D9/255 ,  F03D9/257 ,  F03D17/00 ,  H02H7/067 ,  H02H7/30 ,  H02J3/12 ,  H02J3/16 ,  H02J3/24 ,  H02J3/38 ,  H02J3/386 ,  H02J2003/388 ,  H02P9/006 ,  H02P9/10 ,  Y02E10/763 ,  Y02E40/34

Abstract: A method for controlling a wind power plant, the wind power plant including a plant controller for controlling a plurality of wind turbine generators. The method for controlling a wind power plant allows the wind power plant to continue operating through a grid fault in a weak grid environment. In the method, a fault recovery process is carried out with a wind turbine power controller during a wind turbine fault recovery state to determine a grid voltage (VWTG), compare the grid voltage to a predetermined reference voltage (Vref) to obtain a difference value, and determine a current reference (QrefVC) based on the difference value for generating a reactive current (Idref) for regulating the grid voltage to the predetermined reference grid voltage. A corresponding wind power plant is further provided.

Abstract translation: 一种用于控制风力发电厂的方法，所述风力发电厂包括用于控制多个风力涡轮发电机的设备控制器。 控制风力发电厂的方法允许风力发电厂在弱电网环境中通过电网故障继续运行。 在该方法中，在风力涡轮机故障恢复状态期间，利用风力涡轮机功率控制器进行故障恢复处理，以确定电网电压（VWTG），将电网电压与预定参考电压（Vref）进行比较以获得差值 ，并且基于用于产生用于将电网电压调节到预定参考电网电压的无功电流（Idref）的差值来确定电流参考（QrefVC）。 进一步提供相应的风力发电厂。