System and method for obtaining measure quantity during fault occurrence of direct current pole bus in flexible direct current power grid

A pole bus, fault-time technology, which is applied in the field of systems for obtaining measures for DC pole bus faults in flexible and direct power grids, can solve problems such as time extension, slow speed, and low efficiency, and achieve improved safety, high speed, and time delay. short effect

Active Publication Date: 2019-02-22
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] At present, in the practice of flexible DC power grid engineering, grid faults are complex and changeable, and there is a lack of design methods for its safety control devices. The calculation method of fault measures is slow, inefficient, and time-prolonged, which restricts flexible DC power grids to a certain extent. Safe and stable operation level of the project

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  • System and method for obtaining measure quantity during fault occurrence of direct current pole bus in flexible direct current power grid
  • System and method for obtaining measure quantity during fault occurrence of direct current pole bus in flexible direct current power grid
  • System and method for obtaining measure quantity during fault occurrence of direct current pole bus in flexible direct current power grid

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[0074] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0075] Usually, the flexible direct current grid (referred to as the flexible direct ring network) adopts a true bipolar topology, and the number of converter stations in the flexible direct current grid is usually greater than three. In the true bipolar topology, each converter station includes a positive layer converter and a negative layer converter, and the positive layer converter...

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Abstract

The invention discloses a method for obtaining measure quantity during fault occurrence of a direct current pole bus in a flexible direct current power grid. The method includes the following steps: when it is detected that a fault of the direct current pole bus in the flexible direct current power grid occurs, to-be-adjusted fault measure quantity of a converter and a direct current line according to significant bit and system unbalanced power of the converter and the direct current line in the monitored flexible direct current power grid. The method for obtaining the fault measure quantity during fault occurrence of the direct current pole bus is fast in speed, is high in efficiency and is short in time delay, and can improve the safe and stable operation level of a flexible direct current power grid project to a certain extent.

Description

technical field [0001] The present invention relates to the technical field of flexible direct current power grids, and more specifically, to a system and method for obtaining measures to be taken when a DC pole bus fails in a flexible direct current power grid. Background technique [0002] The grid-connected transmission and consumption of large-scale new energy power generation is of great significance. Flexible DC transmission is an advanced DC transmission technology. Based on flexible DC transmission technology, a flexible DC power grid can be formed, which can realize different regions and different types of new energy grid-connected collections, and achieve functions such as smoothing new energy output fluctuations. Therefore, the flexible DC grid has significant advantages in the integration and consumption of new energy power generation, and it is one of the important directions for the future grid development. [0003] The power system security control device is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 王姗姗王铁柱赵兵孙华东卜广全马士聪李英彪吴广禄
Owner CHINA ELECTRIC POWER RES INST
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