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1. 发明授权

US10146242B2 Micro grid power system 有权
公开(公告)号：US10146242B2
公开(公告)日：2018-12-04
申请号：US15246909
申请日：2016-08-25
申请人： Caterpillar Inc.
发明人： Joshua W. Steffen , Gregory S. Hasler , Dachuan Yu
IPC分类号： G05F1/66 , H02K7/18 , H02J3/38 , H02J3/46 , G05B23/02
摘要： A micro grid power system includes a plurality of generator sets, a photovoltaic system, an external load, and a controller. Each generator set includes an engine and a sensor to determine a temperature of exhaust gases exiting the engine. The photovoltaic system includes a plurality of photovoltaic panels for generating power. The external load is powered by the plurality of generator sets and the photovoltaic system. The controller is configured to determine the external load, and control the plurality of generator sets to maintain the temperature above a threshold temperature. The controller is further configured to determine a remaining load which is the external load subtracted by a portion of the external load powered by the plurality of generator sets, and control the photovoltaic system to power the remaining load.

2. 发明申请

US20160248342A1 METHOD TO CONTROL THREE-PHASE INVERTER VOLTAGE 有权
标题翻译：控制三相逆变器电压的方法
公开(公告)号：US20160248342A1
公开(公告)日：2016-08-25
申请号：US15143053
申请日：2016-04-29
申请人： Caterpillar Inc.
发明人： Dachuan Yu , Osama M. Alkhouli
IPC分类号： H02M7/44 , H02M1/08
CPC分类号： H02M7/44 , H02M1/08 , H02M7/53875 , H02M2007/53876
摘要： A method is provided to control the output voltage across an unbalanced load connected to a three-phase inverter, The method includes transformation of a set of three-phase voltage signals to a dq-coordinate system. Based on the transformation, a set of d-axis and a set of q-axis positive, negative and a set of zero sequence signals are generated. The method includes phase shifting of each of the zero sequence signals to generate 120 degrees and 240 degrees phase shifted zero sequence signals. Each of the zero sequence signals, the 120 degrees and the 240 degrees phase shifted zero sequence signals are transformed to a set of d-axis and q-axis zero sequence signals. A set of error signals, calculated based on the set of d-axis and q-axis zero, positive and negative sequence signals, are minimized and transformed to abc-coordinate system to obtain a three-phase control voltage signal.
摘要翻译：提供了一种控制连接到三相逆变器的不平衡负载上的输出电压的方法。该方法包括将一组三相电压信号变换为dq坐标系。基于该变换，生成一组d轴和一组q轴正，负和一组零序信号。该方法包括每个零序信号的相移以产生120度和240度的相移零序信号。零序信号，120度和240度相移零序信号中的每一个被变换为一组d轴和q轴零序信号。基于d轴和q轴零点的正，负序列信号计算的一组误差信号被最小化并变换为abc坐标系以获得三相控制电压信号。

3. 发明申请

US20140265569A1 TRANSIENT ASSIST USING STARTING BATTERY IN VARIABLE SPEED GENSET 审中-公开
标题翻译：使用在可变速度传感器中启动电池的瞬态辅助
公开(公告)号：US20140265569A1
公开(公告)日：2014-09-18
申请号：US13832755
申请日：2013-03-15
申请人： CATERPILLAR INC.
发明人： Dachuan Yu , Eric Matthew Andris , Gregory J. Speckhart
IPC分类号： H02J3/00
CPC分类号： H02J9/08 , Y10T307/352 , Y10T307/615
摘要： A variable speed genset system is provided. The variable speed genset system may include a primary power source, an electric machine, an energy storage device for starting the primary power source and a boost converter. The electric machine may be mechanically coupled to the primary power source and electrically coupled to one or more loads through a common bus. The boost converter may be in electrical communication with each of at least the common bus and the energy storage device, and configured to selectively communicate power from the energy storage device to the common bus if a bus voltage of the common bus falls to a predetermined lower limit.
摘要翻译：提供变速发电机组系统。可变速发电机组系统可以包括主电源，电机，用于启动主电源的能量存储装置和升压转换器。电机可以机械耦合到主电源并且通过公共总线电耦合到一个或多个负载。升压转换器可以与至少公共总线和能量存储装置中的每个电气通信，并且被配置为如果公共总线的总线电压下降到预定的下限，则将能量选择性地从能量存储装置传送到公共总线限制。

4. 发明授权

US10998732B2 System and method for diverse multi-source energy management 有权
公开(公告)号：US10998732B2
公开(公告)日：2021-05-04
申请号：US16359685
申请日：2019-03-20
申请人： Caterpillar Inc.
发明人： Suresh B. Reddy , Dachuan Yu
IPC分类号： H02J3/00 , H02J3/46 , H02J3/38 , H02J7/04 , G05F1/66 , H02K7/18
摘要： A hybrid micro-grid system for providing power to a load connected to a common bus. The system includes at least one renewable power source, at least one genset, at least one energy storage unit, and an asset management controller operatively coupled to the power sources supply power to the common bus. The AMC is configured to determine a renewable cost function, a genset cost function, and a storage cost function, then assigns a priority of each power source based on the corresponding cost function. The AMC determines a cascade of the power sources based on the determined priority and selectively distributes a power demand of the load between each power source based on the determined cascade.

5. 发明申请

US20200303925A1 System And Method For Diverse Multi-Source Energy Management 审中-公开
公开(公告)号：US20200303925A1
公开(公告)日：2020-09-24
申请号：US16359685
申请日：2019-03-20
申请人： Caterpillar Inc.
发明人： Suresh B. Reddy , Dachuan Yu
IPC分类号： H02J3/46 , H02J3/38 , H02K7/18 , G05F1/66 , H02J7/04
摘要： A hybrid micro-grid system for providing power to a load connected to a common bus. The system includes at least one renewable power source, at least one genset, at least one energy storage unit, and an asset management controller operatively coupled to the power sources supply power to the common bus. The AMC is configured to determine a renewable cost function, a genset cost function, and a storage cost function, then assigns a priority of each power source based on the corresponding cost function. The AMC determines a cascade of the power sources based on the determined priority and selectively distributes a power demand of the load between each power source based on the determined cascade.

6. 发明授权

US09729008B2 Life degradation mitigation for transient response energy storage 有权
公开(公告)号：US09729008B2
公开(公告)日：2017-08-08
申请号：US14263233
申请日：2014-04-28
申请人： Caterpillar Inc.
发明人： John J. Votoupal , Dachuan Yu , Gregory S. Hasler , Gregory J. Speckhart
IPC分类号： H02J1/10 , H02J9/06 , H02J7/00
CPC分类号： H02J9/066 , H02J7/0075 , Y10T307/352
摘要： A variable speed genset system is provided that may include a primary power source, an electric machine, an energy storage device, a boost converter, and a controller. The electric machine may be coupled to the primary power source and electrically coupled to a load through a common bus. The boost converter may be in electrical communication with the common bus and the energy storage device. The controller may determine a State of Health (SOH) for the energy storage device, selectively engage the energy storage device to provide a first power amount to the common bus, and selectively change the operating speed of the primary power source to provide a second power amount to the common bus, the speed based on the SOH, a temperature of the energy storage device, and the load demand. The combination of the first and second power amounts substantially meet a load power demand.

7. 发明申请

US20170063124A1 Control of Hybrid Energy Storage System for High Pulse Load 有权
标题翻译：高脉冲负载混合储能系统的控制
公开(公告)号：US20170063124A1
公开(公告)日：2017-03-02
申请号：US14841216
申请日：2015-08-31
申请人： Caterpillar Inc.
发明人： Dachuan Yu , Gregory J. Speckhart , Eric Matthew Andris
IPC分类号： H02J7/00
CPC分类号： H02J7/0068 , H02J1/00 , H02J7/0029 , H02J7/345
摘要： A HESS and method of controlling a HESS is provided. The HESS may comprise a common DC bus having a DC bus voltage, an energy storage device electrically coupled to the common DC bus, a power device electrically coupled to the common DC bus, and a controller in operable communication with the energy storage device, the power device and the common DC bus. The controller may be configured to, when the energy storage device is charging, increase a power device charging current if an energy storage device charging current is greater than a charging limit for the energy storage device, and when the energy storage device is discharging, increase a power device discharging current if an energy storage device discharging current is greater than a discharging limit for the energy storage device. The HESS may be part of a power system.
摘要翻译：提供了一种控制HESS的HESS和方法。 HESS可以包括具有DC总线电压的公共DC总线，电耦合到公共DC总线的能量存储装置，电耦合到公共DC总线的功率装置，以及与能量存储装置可操作地通信的控制器电源设备和公共直流总线。控制器可以被配置为当能量存储装置正在充电时，如果能量存储装置的充电电流大于能量存储装置的充电限制，则增加功率装置的充电电流，并且当储能装置放电时，增加如果能量存储装置的放电电流大于能量存储装置的放电极限，放电电流的功率器件。 HESS可能是电力系统的一部分。

8. 发明申请

US20140339893A1 Life Degradation Mitigation for Transient Response Energy Storage 有权
标题翻译：瞬态响应能量储存的降解降解
公开(公告)号：US20140339893A1
公开(公告)日：2014-11-20
申请号：US14263233
申请日：2014-04-28
申请人： Caterpillar Inc.
发明人： John J. Votoupal , Dachuan Yu , Gregory S. Hasler , Gregory J. Speckhart
IPC分类号： H02J3/00
CPC分类号： H02J9/066 , H02J7/0075 , Y10T307/352
摘要： A variable speed genset system is provided that may include a primary power source, an electric machine, an energy storage device, a boost converter, and a controller. The electric machine may be coupled to the primary power source and electrically coupled to a load through a common bus. The boost converter may be in electrical communication with the common bus and the energy storage device. The controller may determine a State of Health (SOH) for the energy storage device, selectively engage the energy storage device to provide a first power amount to the common bus, and selectively change the operating speed of the primary power source to provide a second power amount to the common bus, the speed based on the SOH, a temperature of the energy storage device, and the load demand. The combination of the first and second power amounts substantially meet a load power demand.
摘要翻译：提供了一种变速发电机组系统，其可以包括主电源，电机，能量存储装置，升压转换器和控制器。电机可以耦合到主电源并且通过公共总线电耦合到负载。升压转换器可以与公共总线和能量存储装置电连通。控制器可以确定能量存储设备的健康状态（SOH），选择性地接合能量存储设备以向公共总线提供第一功率量，并且选择性地改变主电源的操作速度以提供第二功率相当于公共总线，基于SOH的速度，储能装置的温度和负载需求。第一和第二功率量的组合基本上满足负载功率需求。

9. 发明申请

US20180059700A1 MICRO GRID POWER SYSTEM 审中-公开
公开(公告)号：US20180059700A1
公开(公告)日：2018-03-01
申请号：US15246909
申请日：2016-08-25
申请人： Caterpillar Inc.
发明人： Joshua W. Steffen , Gregory S. Hasler , Dachuan Yu
IPC分类号： G05F1/66 , H02K7/18 , H02P9/00 , H02J3/38 , H02J3/46 , G05B23/02
CPC分类号： G05F1/66 , G05B23/0289 , G05B2219/32184 , H02J3/38 , H02J3/383 , H02J3/46 , H02K7/1815
摘要： A micro grid power system includes a plurality of generator sets, a photovoltaic system, an external load, and a controller. Each generator set includes an engine and a sensor to determine a temperature of exhaust gases exiting the engine. The photovoltaic system includes a plurality of photovoltaic panels for generating power. The external load is powered by the plurality of generator sets and the photovoltaic system. The controller is configured to determine the external load, and control the plurality of generator sets to maintain the temperature above a threshold temperature. The controller is further configured to determine a remaining load which is the external load subtracted by a portion of the external load powered by the plurality of generator sets, and control the photovoltaic system to power the remaining load.

10. 发明授权

US09042141B2 Control of energy storage system inverter system in a microgrid application 有权
标题翻译：微电网应用中储能系统逆变系统的控制
公开(公告)号：US09042141B2
公开(公告)日：2015-05-26
申请号：US13761473
申请日：2013-02-07
申请人： Caterpillar Inc.
发明人： Dachuan Yu , Greg Speckhart
IPC分类号： H02M3/24 , H02M7/44 , G05F1/00 , H02M7/537
CPC分类号： H02M7/537 , H02J3/24 , H02J3/32 , H02M3/1584 , H02M7/797 , H02M2001/007 , Y02P80/14
摘要： A system that manages a supplemental energy source connected to a power grid uses a two stage control strategy to manage power transfers in and out of the power grid as well as in and out of an energy storage system, such as a battery bank. One stage uses a non-linear transfer function to control an output frequency of a DC-to-AC inverter to limit undesired effects of power transients that occur on the grid. A second stage uses control strategy for transferring energy between the energy storage system and an internal DC link based on a relationship between a voltage on a DC link connecting the first and second stages and a DC link reference voltage, the voltage on the DC link, and a voltage at the energy storage system. The control strategy includes rapid charging, over-charging protection, and grid transient stabilization.
摘要翻译：管理连接到电网的补充能源的系统使用两级控制策略来管理进出电力的电力传输以及进出诸如电池组的能量存储系统。一级使用非线性传递函数来控制直流到交流逆变器的输出频率，以限制发生在电网上的功率瞬变的不期望的影响。第二级使用控制策略，用于基于连接第一和第二级的DC链路上的电压与DC链路参考电压之间的关系，DC链路上的电压，在能量存储系统和内部DC链路之间传输能量，和能量存储系统的电压。控制策略包括快速充电，过充电保护和电网瞬态稳定。

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