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Voltage source converter type high voltage direct current transmission active open loop control method and system

A technology of high-voltage direct current transmission and voltage source converter, applied in the field of electric power

Active Publication Date: 2019-03-19
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technology of the present invention proposes a voltage source converter type high voltage direct current transmission active power open-loop control method and system to solve the problem of how to perform active power open loop control on a voltage source converter type high voltage direct current transmission under a weak grid

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  • Voltage source converter type high voltage direct current transmission active open loop control method and system
  • Voltage source converter type high voltage direct current transmission active open loop control method and system
  • Voltage source converter type high voltage direct current transmission active open loop control method and system

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Embodiment Construction

[0036] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0037] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a voltage source converter type high voltage direct current transmission active open loop control method and system. The method comprises the steps that active power is realized through open loop control, and the calculation formula of the reference current of active power open loop control is described in the description; Ps<*> is the active power reference value; Us<*> isthe alternating current voltage reference value; icd<cf<*>> is the reference value of the output current d-axis component of a converter; alternating current voltage control is realized through a closed loop, and the calculation formula of the reference current of alternating current voltage closed loop control is described in the description; icq<cf<*>> is the reference value of the output current q-axis component of the converter; GAC is an outer loop alternating current voltage controller; and Us is the voltage of a PCC bus.

Description

technical field [0001] The present invention relates to the field of electric power technology, and more specifically, to a voltage source converter type high-voltage direct current transmission active power open-loop control method and system. Background technique [0002] Voltage Source Converter based HVDC (Voltage Source Converter based HVDC, VSC-HVDC), especially Modular Multilevel Converter based HVDC (MMC-HVDC), with its technology Advantages have broad application prospects in engineering fields such as new energy grid-connected consumption, island power supply, and weak AC power grid interconnection. Although VSC-HVDC has the ability to connect to weak AC grids, there are still large and small signal stability risks under weak AC grid conditions, which brings new challenges to the safe and stable operation of power systems. [0003] The interaction between the phase-locked loop (Phase Locked Loop, PLL) and the outer loop control in the classic double closed-loop co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/38H02M7/00
CPCH02J3/36H02J3/381H02M7/00Y02E60/60
Inventor 吴广禄王姗姗赵兵李英彪王铁柱杜晓磊
Owner CHINA ELECTRIC POWER RES INST
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