Direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral

A DC transmission system, proportional and integral technology, applied in the direction of power transmission AC network, etc., can solve the problems of not considering discrete system, not suitable for improving the commutation failure of DC transmission system, etc.

Pending Publication Date: 2020-02-04
NARI TECH CO LTD +4
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Problems solved by technology

However, this method does not take into account the impact of the discrete system on the high-frequency chatter and communication delay brought by the differential tracker, and this method is not suitable for improving the commutation failure problem of the DC transmission system. Improving the anti-disturbance control module

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  • Direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral
  • Direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral
  • Direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral

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Embodiment

[0138] The International Conference on Large Power Grids (CIGRE) High Voltage Direct Current Transmission (HVDC) Standard Test Model (CIGRE HVDC) is the first standard model for HVDC control research proposed by the HVDC System Control Working Group of the DC Link Research Committee. The CIGRE HVDC standard test model is built on the PSCAD simulation software to verify the effect of the control method proposed in the present invention on suppressing the continuous commutation failure of DC transmission. The main circuit diagram of the CIGRE HVDC standard test model is as follows: figure 2 As shown in the figure, it is a double-terminal DC, using a 12-pulse converter unit, and the DC unipolar operation, the short circuit ratio (Short Circuit Ratio, SCR) of the AC system is about 2.5, the power supply voltage of the sending end is 383kV, and the power supply voltage of the receiving end is 383kV. It is 215kV. For the parameters shown in the figure, the unit of resistance is Ω,...

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Abstract

The invention discloses a direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral. The method comprises the following steps of: performing discretization processing on an active disturbance rejection proportional integral controller to obtain an adaptive active disturbance rejection proportional integral controller; and realizing constant current control of a rectification side and constant turn-off angle control of an inversion side in a direct current system based on the adaptive active disturbance rejection proportional integral controller. According to the direct current transmission system control method and system disclosed by the invention, the adaptive active disturbance rejection proportional integral controller is applied to the constant current control of the rectification side and the constant turn-off angle control of the inversion side in the direct current system, so that the dynamic response speedand the robustness of the system in response to large-range disturbance are improved, and the continuous commutation failure in the high-voltage direct current transmission system is effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of DC transmission system control, in particular to a DC transmission system control method and system based on adaptive active disturbance rejection proportional integral. Background technique [0002] HVDC transmission is widely used due to its outstanding advantages in the field of cross-regional, large-capacity, and asynchronous grid interconnection transmission. It has important strategic significance for promoting my country's "west-east power transmission, north-south mutual supply, and national networking". However, the thyristor based on semi-controlled device commutation cannot be turned off by controlling the gate level, and needs to rely on the power grid voltage to restore the blocking ability. Therefore, commutation failure has become a key factor to curb the continued development of DC transmission. In January, DC commutation failures occurred 20 times due to AC faults in East China. With the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 吴通华郑玉平王小红戴魏李新东刘其朴孙国强赵志强侯小凡
Owner NARI TECH CO LTD
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