公开(公告)号：US09461472B2

公开(公告)日：2016-10-04

申请号：US14903562

申请日：2013-07-08

Applicant: ABB TECHNOLOGY LTD

Inventor： Ritwik Majumder

IPC: H02J3/14 ,  H02J3/38

CPC classification number: H02J3/14 ,  H02J3/38 ,  H02J2003/388 ,  Y02B70/3225 ,  Y02P80/14 ,  Y04S20/222

Abstract: A method and system for controlling electrical power in a micro-grid, especially during islanding when the micro-grid is disconnected from a main grid is described. A potential load shedding for islanding is determined when the micro grid is connected to the main grid. The potential load shedding is performed when a grid switch that connects the micro-grid to a main grid opens. A frequency based load shedding and a frequency based control of power injections to the micro grid may also be performed. The frequency based load shedding is performed with a faster response than the power injection control during islanding. The frequency based power injection control is performed with a faster response than the frequency based load shedding when the micro grid is connected to the main grid. A load shedding controller, an energy storage controller and methods performed by the load shedding controller, and the energy storage controller, respectively, is also provided.

Abstract translation: 描述了一种用于控制微电网中的电力的方法和系统，特别是当微电网从主电网断开时，在孤岛期间。 当微电网连接到主电网时，确定用于孤岛的潜在负载。 当将微格栅格连接到主栅格的栅格开关打开时，执行潜在的负载脱落。 还可以执行基于频率的负载脱落和对微电网的功率注入的基于频率的控制。 基于频率的负载脱落以比孤岛期间的功率注入控制更快的响应执行。 当微电网连接到主电网时，基于频率的电力注入控制以比基于频率的负载更快的响应执行。 还提供了一个卸载控制器，一个储能控制器和由卸载控制器执行的方法，以及储能控制器。

公开(公告)号：US09935463B2

公开(公告)日：2018-04-03

申请号：US14915967

申请日：2013-09-03

Applicant: ABB TECHNOLOGY LTD

Inventor： Ritwik Majumder

IPC: H02J3/38 ,  H02J3/48

CPC classification number: H02J3/381 ,  H02J3/38 ,  H02J3/48 ,  H02J2003/388 ,  Y02P80/14

Abstract: A microgrid connecting at least one distributed electricity generator includes a first switch configured for, in a closed position, connecting the microgrid to a first network line at a first point of common coupling (PCC) and for, in an open position, disconnecting the microgrid from the first network line at the first PCC; a second switch configured for, in a closed position, connecting the microgrid to a second network line at a second PCC, and for, in an open position, disconnecting the microgrid from the second network line at the second PCC; and a control unit configured for, when an islanding event has been detected when the second switch is in its closed position and the first switch is in its open position, acting to close the first switch, bringing it to its closed position.