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公开(公告)号：US20210050796A1
公开(公告)日：2021-02-18
申请号：US16992051
申请日：2020-08-12
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian BIRIS , Cem Özgür GERÇEK , Lars HELLE , Duy Duc DOAN , Tune PEDERSEN
Abstract: This disclosure proposes a topology that integrates a DC chopper into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module comprising at least the power transistors of the MMC cell. Embodiments herein also describe a method for using an MMC cell's IGBTs and chopper resistors for providing a safe discharge of both cell capacitors and DC-link capacitors in different operating conditions.
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2.发明申请METHOD FOR CONTROLLING A WIND TURBINE INCLUDING REVERSING AN ENERGY FLOW THROUGH A GENERATOR 有权用于控制风力涡轮机的方法，包括通过发电机逆转能量流公开(公告)号：US20160003221A1
公开(公告)日：2016-01-07
申请号：US14755103
申请日：2015-06-30
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tune PEDERSEN
CPC classification number: F03D7/042 , F03D7/0224 , F03D7/0284 , F03D7/048 , F03D9/257 , F05B2270/1033 , F05B2270/337 , Y02E10/723
Abstract: Controlling operation of a wind turbine coupled to a power grid is disclosed. The power grid is monitored in order to determine whether or not there is a match between a demand for energy defined by power consumers connected to the power grid and supply of energy from power producers connected to the power grid. For instance, the price of energy may be monitored. In the case that the supply of energy from power producers exceeds the demand for energy, and a deficiency between the demand for energy and the supply of energy exceeds a first threshold value, the energy flow through the generator is reversed, thereby causing the generator to consume power received from the power grid. Thereby the deficiency can be reduced and the power grid can be stabilised.
Abstract translation: 公开了耦合到电网的风力涡轮机的控制操作。 对电网进行监控，以确定连接到电网的电力用户定义的能量需求与连接到电网的电力供应商的能源供应之间是否存在匹配。 例如，可以监测能源的价格。 在发电厂能源供应超过能源需求的情况下，能源需求与能源供应量之间的差距超过第一阈值时，通过发电机的能量流量相反，从而使发电机 消耗从电网接收的电力。 从而可以减少不足，并且能够稳定电力网。
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公开(公告)号：US20220123667A1
公开(公告)日：2022-04-21
申请号：US17562731
申请日：2021-12-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian BIRIS , Cem Özgür GERÇEK , Lars HELLE , Duy Duc DOAN , Tune PEDERSEN
Abstract: This disclosure proposes a topology that integrates a DC chopper into the Modular Multilevel Converter (MMC) cells of a power converter. The integrated DC chopper may include chopper resistors that may also be advantageously integrated into a heat sink for a power module comprising at least the power transistors of the MMC cell. Embodiments herein also describe a method for using an MMC cell's IGBTs and chopper resistors for providing a safe discharge of both cell capacitors and DC-link capacitors in different operating conditions.
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公开(公告)号：US20170229937A1
公开(公告)日：2017-08-10
申请号：US15510690
申请日：2015-09-03
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Tune PEDERSEN
Abstract: When performing interleaved switching, a power generation system may include chokes for filtering out a high-frequency ripple. However, because the chokes are interconnected, a common mode current can flow between the different parallel converters. Instead of connecting all the outputs of a parallel converter to the same choke, the same phase of each of the parallel converters is sent to one of the chokes. For example, the first phase signals are sent to a first choke, the second phase signals are sent to a second choke, and so forth. By doing so, air gaps in the chokes can be manipulated in order to provide a different inductance for the common mode current than a grid current. For example, the air gaps may be arranged such that the inductance corresponding to the common mode current is greater than the inductance corresponding to the grid current.
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