An energy consumption apparatus and a control method thereof

A technology of energy consumption and energy storage capacitors, which is applied in circuit devices, emergency protection circuit devices, AC network circuits, etc., can solve the problems of large voltage and current change rates of power devices, and difficulty in uniform power devices, achieving low cost and occupying an area The effect of small area and strong system redundancy operation capability

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

[0005] In order to solve the above problems, the present invention proposes an energy consumption device and its control method. The device is connected in parallel between the positive and negative DC pole lines, and adopts a modular design scheme, which solves the problem of uniformity of power devices in the prior art, Problems such as excessive voltage and current change rates at the moment of switching on and off of power devices

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  • An energy consumption apparatus and a control method thereof
  • An energy consumption apparatus and a control method thereof
  • An energy consumption apparatus and a control method thereof

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Embodiment Construction

[0028] Such as Figure 4 As shown, the energy consumption device proposed by the present invention is composed of N (N is an integer greater than 1) sub-modules in series, and the series circuit is connected between the DC pole lines, and the device is used to transform the surplus active power on the DC pole lines To dissipate heat energy, thereby preventing the accumulation of active power on the DC pole line from causing the voltage of the DC pole line to rise and endanger the operation safety of the system.

[0029] Figure 5 Shown is the sub-module topology of the device described in this law. The sub-module is composed of an energy-consuming circuit, a bypass switch, an energy storage capacitor and a power device. The energy storage capacitor provides a clamping voltage for the power device of the sub-module to solve the power device Voltage equalization problem, reduce the voltage and current change rate during the input process of energy-consuming resistors, and reduc...

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Abstract

The invention discloses an energy consumption apparatus and a control method thereof. The apparatus includes N (N is an integer greater than 1) series sub-modules. A series circuit is connected between positive and negative DC polars for converting the surplus active power on the connected DC polar into heat through an energy dissipation resistor in the sub-modules of the apparatus. The technicalsolution proposed by the invention can effectively solve the problem of fault traversal in the field of high voltage direct current transmission and improve the ability of the system to operate stably.

Description

technical field [0001] The invention relates to an energy consumption device and its control method, which is applicable to the fields of high-voltage direct current transmission, new energy grid connection and motor drive, etc., and can quickly convert the surplus active power on the direct current polar line into heat dissipation, and then realize fault ride-through . Background technique [0002] The utilization scale of renewable energy such as wind energy and solar energy continues to expand, but its inherent characteristics of decentralization and distance from the load center make it an urgent and challenging task to study how to connect new energy sources such as wind power to the grid. Since wind farms are usually far away from the power grid, a large capacitive current will be generated when they are connected to the power grid through AC. HVDC transmission technology has become a feasible and economical solution. Because the high-voltage flexible DC transmission ...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/38H02H7/26
CPCH02J3/382H02H7/268H02J3/36Y02E60/60
Inventor 詹长江姜田贵谢晔源李钢
Owner 詹长江
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