Closed-loop power distribution network system based on flexible direct current

A distribution network system and flexible DC technology, applied in the electric power field, can solve problems such as low power supply reliability, weak distribution network, and poor voltage quality, and achieve the effect of alleviating the weak power grid, improving voltage quality, and low power supply reliability

Active Publication Date: 2013-02-20
SHENZHEN POWER SUPPLY BUREAU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve various technical problems such as weak distribution network, poor voltage quality, low power supply reliability, and tight transmission channel corridors

Method used

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  • Closed-loop power distribution network system based on flexible direct current
  • Closed-loop power distribution network system based on flexible direct current
  • Closed-loop power distribution network system based on flexible direct current

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Embodiment Construction

[0024] In order to solve various technical problems in the flexible DC distribution network system in the prior art, such as weak distribution network, poor voltage quality, low power supply reliability, and tight transmission channel corridors, the present invention provides a closed-loop system based on flexible DC Formed distribution network system, including:

[0025] N DC buses and N DC transmission lines; each DC bus is connected to the DC transmission line at intervals, specifically, the DC bus and the DC transmission lines are connected "hand in hand" at intervals to form a flexible DC closed-loop distribution network; N is A natural number greater than or equal to 3;

[0026] Each of the DC buses is connected with at least one AC system rectifier station for rectifying the electrical energy of the AC system into DC electrical energy and feeding it into the flexible DC closed-loop distribution network.

[0027] Wherein, the at least one AC system rectification station...

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Abstract

The invention provides a closed-loop power distribution network system based on a flexible direct current. The system comprises N direct current buses and N direct current transmission lines, and each direct current bus is connected with the direct current transmission lines at intervals to form a closed-loop power distribution network; each direct current bus is connected with at least one alternating current system rectifier station so as to rectify electric energy of the alternating current system to direct current electric energy, and the direct current electric energy is gathered into a closed-loop power distribution network system of the flexible direct current; at least one alternating current system rectifier station is used as a regulator station to control and regulate direct current voltage; each direct current bus is connected with M user inverter stations which can invert the direct current electric energy to the alternating current electric energy to provide for users; and each direct current transmission line is provided with K direct current switches, and when the direct current transformation lines break down, the switches are used for tripping to isolate fault points. According to the closed-loop power distribution network system based on the flexible direct current, the support can be provided for voltage stability, the voltage quality is improved, and a good environment can be created for the medium voltage distribution network system improvement.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a closed-loop distribution network system based on flexible direct current. Background technique [0002] With the development of power electronic devices and control technology, a new type of semiconductor device—Insulated Gate Bipolar Transistor (IGBT) has been applied in low-voltage systems, making IGBT a voltage source converter for switching devices ( Voltage-Sourced Converter, VSC), and then widely used in industrial drive devices, and after several upgrades of the voltage and capacity of subsequent IGBT devices, the voltage source converter composed of insulated gate bipolar transistors is used in DC transmission. The application in the distribution network becomes a reality. [0003] In the application of DC transmission and distribution network, the converter adopts IGBT valve and two-level (or multi-level) three-phase mechanism, and uses pulse width modulation ...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J1/00
CPCY02E60/60
Inventor 王世祥
Owner SHENZHEN POWER SUPPLY BUREAU
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