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Fault current controller and control method

A fault current and control method technology, applied in electrical components, circuit devices, DC network circuit devices, etc., can solve the problems of high engineering cost and complex DC distribution network control, improve load power quality, achieve effective control, Achieve the effect of line voltage regulation

Active Publication Date: 2021-01-22
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that independent equipment is used to realize the control of fault current breaking, power flow scheduling and voltage regulation, resulting in complicated control of DC distribution network and high engineering cost, thereby providing a A kind of fault current controller and control method

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Embodiment Construction

[0032] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention discloses a fault current controller and a control method, the controller comprises a capacitor, a first controlled switch, a second controlled switch and a first inductor, and two endsof the capacitor are externally connected with a DC power grid; the first end of the first controlled switch is connected with one end of the capacitor, the second end of the first controlled switch is connected with one end of the first inductor and the first end of the second controlled switch, and the control end of the first controlled switch is externally connected with a first control signal. The other end of the first inductor is connected with one end of a DC load; and the second end of the second controlled switch is respectively connected with the other end of the capacitor and the other end of the DC load. By implementing the invention, the control of fault current breaking, power flow scheduling and voltage regulation is integrated in the fault current controller, so that the requirements of passive devices of the whole fault current controller are reduced, and the control complexity and the engineering cost of the direct-current power distribution network are further reduced.

Description

technical field [0001] The invention relates to the technical field of direct current distribution networks, in particular to a fault current controller and a control method. Background technique [0002] With the development of power electronics technology, compared with AC distribution network, DC distribution network has advantages in line cost, transmission loss, power supply reliability, etc., which can effectively improve power supply capacity and power quality, and give full play to the advantages of distributed energy. value and benefit. [0003] However, there are problems of fault current limiting blocking and power quality management in the current DC distribution network. When a fault occurs on the DC line, the short-circuit current rises rapidly and there is no zero-crossing point. Therefore, it is necessary to connect a current limiting device and a blocking device in series in the line to suppress the rising rate of the fault current and realize the breaking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00
CPCH02J1/00H02J2203/10Y02E60/60
Inventor 尹靖元张宸宇袁晓冬李娟吴理心韦统振
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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