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Transient Stability Control Method for UHVDC Transmission

An ultra-high voltage DC, transient stability technology, applied in the direction of DC network circuit devices, adaptive control, general control systems, etc., can solve the problem of weak robustness, high system mathematical modeling requirements, and difficult to obtain satisfactory control effects. and other problems, to achieve the effect of rapid recovery, ensuring safe and stable operation, and fast and effective power support

Inactive Publication Date: 2011-12-14
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] The UHV DC additional control method that has been adopted at present is mainly based on the classic automatic control theory, which requires high mathematical modeling of the system, and it is difficult to obtain a satisfactory control effect, and its robustness is not strong.

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  • Transient Stability Control Method for UHVDC Transmission
  • Transient Stability Control Method for UHVDC Transmission
  • Transient Stability Control Method for UHVDC Transmission

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0027] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0028] (1) Select the structure of the control system:

[0029] The power system is a nonlinear time-varying complex system. One-dimensional controllers (single input variable) are difficult to meet the control requirements, while three-dimensional and above controllers have complex control laws and are difficult to obtain accurately in reality. Therefore, two-dimensional control is widely used. device. According to experience, dividing the domain of input variables into 3-5 fuzzy variables can generally meet the control requirements. The control rule is generally set a...

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Abstract

The invention discloses a transient stability control method for ultra-high voltage direct current transmission, and proposes a transient stability control method for ultra-high voltage direct current transmission based on pi-sigma fuzzy neural network. system, using the error backpropagation neural network learning algorithm to optimize the relevant parameters of the fuzzy system, combined with UHV DC transmission system to design a pi-sigma fuzzy neural network controller with simple structure and easy implementation. This method can still provide great damping for the system when the system control structure or system operating point changes, quickly suppress system oscillation, and has a simple structure and reliable operation, and has good adaptability and robustness. The development of transmission transient stability control system provides necessary data support and favorable reference.

Description

technical field [0001] The invention relates to a transient stability control method for ultra-high voltage direct current transmission, which is used for improving the transient stability of an AC-DC hybrid power system, and belongs to the technical field of power system stability control. Background technique [0002] Because of its large transmission capacity, fast control response, and no stability problem of synchronous operation, HVDC transmission has obvious advantages in long-distance and large-capacity power transmission, and has become an important way of power transmission and regional networking. However, the current HVDC transmission still cannot meet the power supply demand in terms of transmission length and transmission capacity, so the development of UHVDC transmission is imperative. Due to the large-capacity, long-distance, and cross-regional transmission requirements of the power industry, UHVDC has been increasingly used in regional grid interconnection d...

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Application Information

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IPC IPC(8): H02J1/00G05B13/02
Inventor 刘建坤顾伟胡弢李群孙蓉魏旭
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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