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An inverter integrating the function of energy consumption circuits

A technology of energy-consuming circuits and converters, which is applied in the direction of output power conversion devices, conversion of AC power input to DC power output, electrical components, etc., can solve the problems of land occupation and cost increase, and achieve strong versatility and avoid The effect of excessive voltage and current change rate and easy maintenance

Inactive Publication Date: 2019-04-05
詹长江
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Problems solved by technology

The DC chopper circuit can be installed in the shore-side converter station, which is the first choice for offshore wind farms based on VSC-HVDC grid connection. Currently, the DC chopper circuit solutions that have been applied must build a separate valve tower, resulting in a decrease in land occupation and cost. A substantial increase

Method used

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  • An inverter integrating the function of energy consumption circuits
  • An inverter integrating the function of energy consumption circuits
  • An inverter integrating the function of energy consumption circuits

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Embodiment Construction

[0029] image 3 Shown is a typical three-phase topology of the present invention, each phase bridge arm is formed by series connection of N submodules, wherein, at least one phase bridge arm is formed by series connection of submodules of the integrated energy consumption circuit proposed by the present invention, and the remaining bridge arms The half-bridge or full-bridge sub-modules commonly used in ordinary MMC converter valves are still used, and will not be described in detail here.

[0030] Figure 4 Shown is an embodiment of the sub-module of the present invention, the sub-module is an energy-consuming module composed of a third power device, a first freewheeling diode and an energy-dissipating resistor, the first and second power devices, the storage Composed of energy components and bypass switches. The sub-module has two working modes, commutation mode and energy consumption mode. When it works in the commutation mode: when the first power device is turned on and ...

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Abstract

The invention discloses an inverter integrating the function of energy consumption circuits. The converter comprises a single phase bridge arm formed by connecting at least two submodules in series, wherein each submodule comprises an energy consumption circuit, and the energy consuming circuit is composed of an energy consumption resistor, a first power device and an anti-parallel diode of the first power device. According to the inverter integrating the function of energy consumption circuits, no independent energy consumption circuit valve tower needs to be individually arranged and the inverter has advantages of a compact structure, small land occupation, low cost, strong fault ride-through capability, etc.

Description

technical field [0001] The invention relates to a converter with an integrated energy-consuming circuit function in the field of medium and high direct current transmission, which is used to realize the dissipation of short-term system surplus energy and improve the fault ride-through capability of the system. Background technique [0002] As the world's population continues to increase and the climate continues to warm, there is an urgent need for renewable energy that can replace traditional energy such as coal, oil, and natural gas. Since the 20th century, renewable energy such as wind energy, solar energy, and tidal energy have entered the planning agenda of various governments. China plans to make renewable energy account for 15% of the total energy supply by 2020. By 2050, renewable energy 1 / 3 of the total energy. Up to now, renewable energy accounts for 16.7% of total energy in EU member states, and 10.1% in my country, reaching 15% during the 13th Five-Year Plan per...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/24H02M7/5387H02M7/219
CPCH02J3/24H02J3/38H02M7/219H02M7/5387Y02A30/60
Inventor 詹长江姚宏洋李钢王宇
Owner 詹长江
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