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Connect or disconnect power in branches of DC grid nodes using longitudinal voltage sources

A vertical voltage, DC grid technology, applied in the direction of load balance in DC network, power transmission AC network, etc., can solve the problem of limiting the possibility of energy flow control, etc., achieve the effect of reducing overhead and achieving high voltage resistance

Active Publication Date: 2017-03-29
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The device mentioned at the outset has the disadvantage that it severely limits the possibilities with regard to energy flow control

Method used

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  • Connect or disconnect power in branches of DC grid nodes using longitudinal voltage sources
  • Connect or disconnect power in branches of DC grid nodes using longitudinal voltage sources
  • Connect or disconnect power in branches of DC grid nodes using longitudinal voltage sources

Examples

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Embodiment Construction

[0044] figure 1 An embodiment of a DC network node 1 according to the invention is shown with a series of branches 2 , 3 , 4 in which embodiments of a device 5 according to the invention are arranged in each case. Each device 5 has a longitudinal voltage source with means for connecting and disconnecting electrical power, wherein the means for connecting and disconnecting electrical power are connected to each other via a low voltage busbar 6 . In this way, for example, power exchange is enabled between the devices 5a, 5b and 5c. Optionally, a transverse current source 40 is provided, which can be connected to the DC grid node 1 and the low-voltage bus 6 . Furthermore, a zero point 41 (ground potential) can be provided, which is connected to the devices 5 a , 5 b and 5 c and to the transverse current source 40 .

[0045] Figure 5 based on figure 1 , showing the situation of a bipolar direct current transmission network comprising a positive star point 1a and a negative st...

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PUM

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Abstract

A device (5a, 5b, 5c) for load flow control of DC current in branches (2, 3, 4) of a DC grid node (1) using a longitudinal voltage source (11) is proposed, said longitudinal voltage The source has means for connecting or disconnecting electric power, wherein the means for connecting and disconnecting electric power are connected with another one arranged in another branch (2, 3, 4) of the same dc grid node (1). is coupled to means for connecting and disconnecting power of the device (5a, 5b, 5c) for load flow control. Thus, the device can be used economically and flexibly for controlling load flow at or in grid nodes.

Description

technical field [0001] The invention relates to a device for connecting or disconnecting electric power in a branch of a direct current grid node using a longitudinal voltage source having means for connecting or disconnecting electric power. Background technique [0002] In WO2010 / 115453A1 a voltage compensation in a DC transmission network is proposed. Wherein a longitudinal voltage source is introduced in the DC transmission line to keep the voltage in the DC grid within the allowable range at all points. By introducing a longitudinal voltage source, it is unavoidable to supply or divert electrical energy to the DC system at this location. According to WO 2010 / 115453, this electrical energy is taken from the existing three-phase grid or from the DC line itself with the aid of additional equipment. [0003] The device mentioned at the outset has the disadvantage that it severely restricts the possibilities with regard to energy flow control. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60H02J1/14
Inventor H-G.埃克尔
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG