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Energy dissipation system applied to flexible direct current power transmission and control method thereof

A flexible DC power transmission and energy dissipation technology, applied in AC network circuits, wind power generation, electrical components, etc., and can solve problems such as system overvoltage

Inactive Publication Date: 2019-10-29
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose an energy dissipation system applied to flexible direct current transmission, which is used to solve the system overvoltage problem caused by the failure of the flexible direct current transmission system, and proposes a corresponding control method

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  • Energy dissipation system applied to flexible direct current power transmission and control method thereof
  • Energy dissipation system applied to flexible direct current power transmission and control method thereof

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Embodiment Construction

[0015] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] figure 1 Shown is an embodiment of an energy dissipation system applied to flexible direct current transmission according to the present invention. The energy dissipation system is composed of a power electronic switch 1 and a load resistor 2;

[0017] The connection mode of the energy dissipation system is as follows: one end of the power electronic switch 1 is connected to the busbar of the AC power grid on the rectification side of the flexible DC transmission, and the other end is connected to the load resistor 2;

[0018] The control method of the energy dissipation system proposed in this scheme is: when the flexible direct current transmission system connected to the energy dissipation system breaks down and needs to consume energy, the power electronic switch is quickly unlocked, and the load resistance is connected to the AC...

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Abstract

The invention discloses an energy dissipation system applied to a flexible direct current power transmission system. The energy dissipation system is composed of an electronic power switch and a loadresistor, and the electronic power switch and the load resistor are connected in series to an alternating current power grid of a rectifier side of a flexible direct current power transmission system.The invention also provides a corresponding control method. The energy dissipation system is used for consuming transient energy accumulation caused by faults of the flexible direct current power transmission system, prevents overvoltage of a power module of the flexible direct current power transmission system, and also prevents frequency instability and voltage instability of an alternating current system.

Description

technical field [0001] The invention belongs to the field of flexible direct current transmission, in particular to an energy dissipation system applied to flexible direct current transmission and a control method thereof. Background technique [0002] With the development of flexible DC transmission technology, there are more and more applications to link island power grids through flexible DC transmission. The applications of flexible DC link island systems mainly include power supply for offshore oil and gas drilling platforms and wind power grid integration. There are already a large number of domestic and foreign application. [0003] When the converter station is connected to the island system, the converter uses VF control to control the bus voltage and frequency connected to the AC system. The active and reactive power of the converter is determined by the new energy power supply and load in the AC system. In HVDC flexible transmission, when the system fails, whethe...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/38
CPCH02J3/386H02J3/36H02J3/388Y02E10/76Y02E60/60
Inventor 李成博
Owner NR ELECTRIC CO LTD
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