Analysis method of direct-current disconnection fault of multi-terminal flexible direct-current power distribution system

A DC power distribution, multi-terminal flexible technology, applied to AC network circuits, circuit devices, power transmission AC networks, etc., can solve the problem of single-pole disconnection faults and lack of fault characteristics

Active Publication Date: 2019-04-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Since the short-circuit fault has a strong short-circuit impulse current, the research is relatively in-depth. The single-pole disconnection f

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  • Analysis method of direct-current disconnection fault of multi-terminal flexible direct-current power distribution system
  • Analysis method of direct-current disconnection fault of multi-terminal flexible direct-current power distribution system
  • Analysis method of direct-current disconnection fault of multi-terminal flexible direct-current power distribution system

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[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] Such as figure 1 As shown, the flow chart of the analysis met...

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Abstract

The invention discloses an analysis method of a direct-current disconnection fault of a multi-terminal flexible direct-current power distribution system, wherein the fault analysis comprises the following steps of step 1, aiming at open-loop and closed-loop operation modes of the multi-terminal flexible direct-current power distribution system, analyzing the difference of the power flow transfer in the open-loop and the closed-loop operation modes after the disconnection fault occurs; step 2, analyzing the change of the energy state of a current converter at the two ends according to the difference of the power flow transfer in the open-loop and the closed-loop operation modes after the disconnection fault occurs and a rectifying side and inverter side converter control method; and 3, establishing a model for analyzing the disconnection fault mechanism of the multi-terminal flexible direct-current power distribution system.

Description

technical field [0001] The invention relates to the technical field of control and protection of flexible DC power distribution systems, in particular to an analysis method for DC disconnection faults of multi-terminal flexible DC power distribution systems. Background technique [0002] With the rise of new energy power generation and the development of DC loads such as electric vehicles, the research on flexible DC power distribution systems is attracting widespread attention at home and abroad. Compared with the AC power distribution system, the DC power distribution system has very prominent advantages in adapting to distributed power sources and DC loads. It has flexible control, large transmission capacity, excellent power quality, and low commutation loss. It is the future power distribution system. One of the trends in the field of development. There are three main types of DC system faults: double-pole short-circuit faults, single-pole short-circuit faults to groun...

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Application Information

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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 贾科冯涛赵其娟毕天姝王聪博陈金锋
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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