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Method for realizing stable control function of high-voltage direct-current power transmission system

A technology for stabilizing control and power transmission systems, applied in AC network circuits, electrical components, circuit devices, etc., can solve problems such as real-time DC power control amount matching, achieve optimal modulation control effects, and solve problems such as excessive DC power control amount or small effect

Inactive Publication Date: 2020-05-22
CHINA SOUTHERN POWER GRID COMPANY
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Problems solved by technology

[0005] Aiming at the problem that the fixed value of the stability control function set on the HMI interface of the DC operation control cannot completely match the real-time DC power control amount calculated by the stabilization device, the present invention proposes a method for realizing the stability control function of the HVDC transmission system, and achieves the optimal Modulation Control Effects

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  • Method for realizing stable control function of high-voltage direct-current power transmission system

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Embodiment Construction

[0016] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 As shown, this embodiment provides a method for realizing the stability control function of the HVDC transmission system, which specifically includes:

[0018] Step 1: Set the control words "stability control function effective", "stability control function level automatic setting" and "stability control function level manual setting" on the DC operation control interface HMI;

[0019] Step 2: If the operator enters the control word "Stability control function effective", the DC power boost, DC power drop and DC power limit and other stability control functions are activated, and enter the third step; if the operator exits the "Stability control function If the control word is valid, the stability control ...

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Abstract

The invention discloses a method for realizing a stable control function of a high-voltage direct-current power transmission system. The method comprises the following steps of: adding a stable control function effective function, a stable control function gear automatic setting function and a stable control function gear manual setting function into a direct-current control system; if the stablecontrol function effective function is input, the stable control function is activated, and the next step is executed; and the stable control function gear automatic setting is input, and the stable control function gear manual setting is quitted, or the stable control function gear automatic setting is quitted, and the stable control function gear automatic setting is input. When an external power grid system breaks down, a stability device calculates a real-time direct-current power control quantity according to the running state of the power grid and transmits the control quantity to the direct-current control system; and the direct current control system selects a stable control quantity according to the automatic state of the stable control function gear automatic setting and the stable control function gear manual setting . According to the method, the optimal modulation control effect can be achieved.

Description

technical field [0001] The invention relates to direct current transmission technology, in particular to a method for realizing the stability control function of a high-voltage direct current transmission system. Background technique [0002] The stability control function of the HVDC transmission system is also called the additional control function of the DC system, which refers to a function that uses the rapid controllability of the DC transmission system to change the characteristics of the connected AC system by adjusting the DC power. When the AC system connected to the DC system is disturbed, the stability control function restores the AC system to stability by adjusting the transmission power of the DC system. [0003] At present, the stability control functions used in HVDC transmission systems mainly include DC power boost (Power Run-up), DC power drop (Power Run-down) and DC power limit (Power Limit). Each level, the fixed value power of each level needs to be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/24
CPCH02J3/24H02J3/36H02J2003/365Y02E60/60
Inventor 谢惠藩张建新徐光虎刘洪涛李鹏
Owner CHINA SOUTHERN POWER GRID COMPANY
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