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Device and method for mutual conversion of DC power and AC power control targets

A technology of power control target and AC power, applied in power transmission AC network, single-network parallel feeding arrangement, etc. Problems such as the unbalanced operation mode of multi-hybrid converters, to achieve the effect of accurate power control, precise power control, and power control

Active Publication Date: 2019-04-12
NR ELECTRIC CO LTD +1
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  • Abstract
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Problems solved by technology

[0006] Because the above method has some shortcomings, and it is only applicable to the unbalanced operation mode of multi-hybrid converters, it cannot meet the requirements of precise control of multi-hybrid converters, let alone the requirements of balanced operation mode of multi-hybrid converters

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  • Device and method for mutual conversion of DC power and AC power control targets
  • Device and method for mutual conversion of DC power and AC power control targets
  • Device and method for mutual conversion of DC power and AC power control targets

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Embodiment Construction

[0060] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention. Wherein, the same components use the same reference numerals.

[0061] The present invention proposes a method for mutual conversion of DC power and AC power control targets. The method is used in a hybrid DC power transmission system and includes a power control target value generation link and a power deviation balance link;

[0062] The power control target value generation link is used to calculate the power command value and generate the power control target value according to the operation mode and in combination with the conversion relationship between DC power and AC power;

[0063] The power deviation balancing link is used to balance the d...

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Abstract

The invention discloses a device and method for mutual conversion of DC power and AC power control targets. The device comprises a power control target value generation unit and a power deviation balancing unit, wherein the power control target value generation unit is used for calculating a power instruction value and generating a power control target value according to a running mode and by combining a conversion relation between a DC power and an AC power, and the power deviation balancing unit is used for sending deviation between an actually-measured AC power value and an AC instruction value, or deviation between an actually-measured DC power value and a DC instruction value, or deviation between an actually-measured AC current value and an AC instruction value or deviation between an actually-measured DC current value and the DC instruction value to a regulator for adjustment so as to generate power balancing quantity. By the device, the problem of power coordination control ofa hybrid converter can be effectively solved, accurate power control of the hybrid converter is achieved, meanwhile, the steady-state performance and the transient-state performance of the system arecompatible, and the power control of the hybrid DC power transmission system can be more accurately achieved.

Description

technical field [0001] The invention belongs to the field of hybrid direct current transmission, and in particular relates to a device and method for mutual conversion of direct current power and alternating current power control targets. Background technique [0002] HVDC systems can be divided into two types: conventional DC transmission systems (LCC-HVDC) based on thyristor technology and flexible HVDC systems based on fully controlled power electronic device technology (Flexible-HVDC). Among them, the conventional direct current transmission system (LCC-HVDC) has low cost, low loss, and mature operation technology. The inverter side is prone to commutation failure, strong dependence on the AC system, absorbing a large amount of reactive power, and large area occupied by the converter station. The new generation of flexible direct current transmission system (Flexible-HVDC) can realize the decoupling control of active power and reactive power, can supply power to the pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/46
CPCH02J3/36H02J3/46Y02E60/60
Inventor 赵文强王永平俞翔鲁江黄志岭卢宇李海英
Owner NR ELECTRIC CO LTD
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