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Sub-synchronous oscillation suppression method based on controllable series compensation additional impedance deviation control

A technology of subsynchronous oscillation and additional impedance, applied in the field of power grid application research, to achieve the effect of easy implementation, good application prospect, and favorable power grid application

Active Publication Date: 2012-08-29
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the past, experts and scholars at home and abroad have done some research on suppressing subsynchronous resonance with series compensation systems, but the phenomenon of subsynchronous oscillation caused by controllable series compensation has not been reported in domestic and foreign power system news and publications. The suppression method of the phenomenon is studied

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  • Sub-synchronous oscillation suppression method based on controllable series compensation additional impedance deviation control
  • Sub-synchronous oscillation suppression method based on controllable series compensation additional impedance deviation control
  • Sub-synchronous oscillation suppression method based on controllable series compensation additional impedance deviation control

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] Such as figure 2 , a subsynchronous oscillation suppression method based on controllable series compensation additional impedance deviation control, the suppression method comprising the following steps:

[0035] Step 1. Build a controllable series compensation control system model, such as image 3 shown;

[0036] Step 2. Select the input signal of the controller;

[0037] Step 3. Analyze the impedance deviation;

[0038] Step 4. Controlling the impedance deviation.

[0039] In the step 1, the controllable series compensation control system includes a measurement unit, a controller regulation unit, a trigger unit and a controllable series compensation main circuit unit; the measurement unit transmits the collected signal to the controller regulation unit, and the The trigger signal processed by the controller regulation unit is transmitted to th...

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Abstract

The invention provides a sub-synchronous oscillation suppression method based on controllable series compensation additional impedance deviation control, which belongs to the field of power grid application research. The suppression method comprises the following steps of: constructing a controllable series compensation control system model; selecting an input signal of a controller; analyzing a rotating speed deviation and an impedance deviation; and controlling the impedance deviation. The method is simple and intuitional, has high reliability, and is easy to implement; power grid application is facilitated, and the method has a better application prospect; and in various running ways of a system, the controllable series compensation additional impedance deviation control has a better suppression effect on sub-synchronous oscillation.

Description

technical field [0001] The invention belongs to the field of power grid application research, and specifically relates to a subsynchronous oscillation suppression method based on controllable series compensation additional impedance deviation control. Background technique [0002] Controllable series compensation can continuously control the line power in a wide range. From a system point of view, the principle of variable series compensation is only to increase the fundamental frequency voltage on the fixed capacitor in the series compensation line by appropriately changing the firing angle α, and this increased voltage changes the series capacitive reactance valid value. Such as figure 1 As shown, the controllable series compensation main circuit includes capacitor C, bypass reactor LS, bidirectional thyristor and RC absorption branch. [0003] Subsynchronous oscillation is a phenomenon caused by the electromechanical coupling of the power system, which is different fro...

Claims

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Application Information

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IPC IPC(8): H02J3/24
Inventor 朱旭凯朱雨晨田芳李亚楼张星徐得超刘敏张艳
Owner CHINA ELECTRIC POWER RES INST