公开(公告)号：US20150092311A1

公开(公告)日：2015-04-02

申请号：US14042594

申请日：2013-09-30

Applicant: ABB Technology AG

Inventor： Zhenyuan Wang ,  Joseph A. Carr ,  Jing Xu ,  Juhua Liu

IPC: H02H1/04 ,  H02H3/247 ,  H02H3/24 ,  H02H3/08

CPC classification number: H02H1/043 ,  H02H3/08 ,  H02H3/087 ,  H02H3/24 ,  H02H3/247

Abstract: Methods, systems, and computer readable media for providing protection of DC building electrical systems are disclosed. According to one aspect, a system for over-current protection of direct current (DC) building electrical systems includes a DC bus for providing DC power to a building and multiple DC feeder conductors for providing DC power to multiple locations within the building. Each DC feeder conductor is connected to the DC bus via a DC protection module having a fuse, a normally closed switch connected in parallel with the fuse, and a circuit breaker connected in series with the fuse and switch, where the switch is controllable to be closed to protect the fuse against transient current conditions and controllable to be open after the transient current conditions have subsided to allow the fuse to operate normally.

Abstract translation: 公开了用于提供DC建筑物电气系统保护的方法，系统和计算机可读介质。 根据一个方面，用于直流（DC）建筑物电气系统的过电流保护的系统包括用于向建筑物提供直流电力的DC总线和用于向建筑物内的多个位置提供直流电力的多个DC馈线导体。 每个直流馈电导体通过直流保护模块连接到直流母线，该保护模块具有保险丝，与保险丝并联连接的常闭开关，以及与保险丝和开关串联连接的断路器，其中开关可控制为 关闭以保护熔断器免受瞬态电流条件的影响，并且在瞬态电流条件已经消退以后可控制为断开，以使熔断器正常工作。

公开(公告)号：US20140265599A1

公开(公告)日：2014-09-18

申请号：US13826762

申请日：2013-03-14

Applicant: ABB Technology AG

Inventor： Xiaoming Feng ,  Juhua Liu ,  Ernst Scholtz

IPC: H02J4/00

CPC classification number: H02J5/00 ,  H02J3/18 ,  Y02E40/30 ,  Y10T307/675

Abstract: Power flow in a hybrid AC-DC power system is analyzed by determining DC power injection variables as a function of AC state information for common coupling buses which connect AC and DC grids. The AC state information includes voltage magnitude and phase angle information for the common coupling buses and buses in the AC grid(s). The DC power injection variables indicate AC power injection into the one or more AC grids at the common coupling buses from the DC grid(s). The AC state information is revised iteratively as a function of the DC power injection variables and the sensitivity of the DC power injection variables to the AC state information, and the DC power injection variables and the sensitivity of the DC power injection variables are revised iteratively as a function of the revised AC state information until the power mismatch is acceptable.

Abstract translation: 通过确定DC功率注入变量作为连接AC和DC网格的公共耦合总线的AC状态信息的函数来分析混合AC-DC电力系统中的功率流。 AC状态信息包括用于公共耦合总线和AC网格中的总线的电压幅度和相位角信息。 直流电源注入变量表示在DC电网的公共耦合总线处AC电力注入到一个或多个AC电网中。 AC状态信息作为DC功率注入变量的函数和DC功率注入变量对AC状态信息的灵敏度进行迭代修改，DC功率注入变量和DC功率注入变量的灵敏度迭代地修改为 修正的AC状态信息的功能，直到功率不匹配是可接受的。