Calculation method and system of network source coordinated control strategy for DC island frequency stability
A technology of DC islanding and coordinated control, which is applied to AC network circuits, power transmission AC networks, and reducing/preventing power oscillations. Harmonized operating levels, improved transient stability, improved economy and safety effects
Active Publication Date: 2021-01-15
TSINGHUA UNIV +4
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Problems solved by technology
It is difficult to maintain the frequency stability of the island system by relying on primary frequency modulation alone, and it is difficult to exert the maximum capability of network source control by relying on DC additional control alone
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[0039]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0040] The method and system for calculating the network source coordinated control strategy for DC island frequency stabilization according to the embodiments of the present invention will be described below with reference to the accompanying drawings.
[0041] Firstly, a method for calculating a network source coordinated control strategy for DC island frequency stabilization proposed according to an embodiment of the present invention will be described with reference to the accompanying drawings.
[0042] figure 2 It is a flo...
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The invention discloses a network source coordinated control strategy calculation method and system with stable direct current island frequency. The method includes the following steps: according to an actual power system model, parameters, operation modes and preset faults, performing transient stable time domain simulation to obtain the faults and instability modes leading to instability of a direct current island system; performing speed regulation system auxiliary control parameter design on an island generator set by employing a prime mover speed controller additional control GPSS design;performing parameter design on direct current emergency power support by utilizing a particle swarm optimization algorithm; and forming a network source coordinated control strategy according to theparameter design of speed controlling system auxiliary control quantity, the parameter design of the direct current emergency power support, and the faults and the instability modes leading to the instability of the direct current island system. The method can be used for calculation of offline or online decision-making emergency control measures, improves transient stability of the direct currentisland system, coordinates different control measures of a network source, and improves the coordinated operation level of a machine network and economy and safety of electric power system operation.
Description
technical field [0001] The invention relates to the technical field of power systems and automation thereof, in particular to a calculation method and system for a network source coordination control strategy with stable DC island frequency. Background technique [0002] In recent years, DC transmission systems have been widely used in long-distance large-capacity power transmission and regional asynchronous interconnection projects. The DC transmission system facilitates the asynchronous network operation of the two major power systems and the network connection of power systems with different frequencies. Using the power modulation of the DC system can improve the damping of the power system, suppress low-frequency oscillations, and improve the transmission capacity of parallel-operated AC transmission lines. [0003] The DC island refers to the independent small-scale grid system formed by the DC transmission system and adjacent stations and lines, which loses the electri...
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IPC IPC(8): H02J3/00H02J3/24H02J3/36
CPCY02E60/60
Inventor 胡伟刘劲松冯达韩月张强周全张亚迪丛鹏包维雄陈佟蔡亮
Owner TSINGHUA UNIV