System and method for suppressing sub-synchronous resonance of generating set

A subsynchronous resonance, generator set technology, applied in the direction of controlling generators, control systems, electrical components, etc., can solve problems such as increasing cost and increasing system control complexity, achieve large damping current, improve subsynchronous suppression effect, Avoid the effects of interaction and interference

Active Publication Date: 2013-05-29
北京睿能世纪科技有限公司 +1
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  • Application Information

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Problems solved by technology

[0004] In addition, in order to meet the requirements of grid-connected operation, the device based on the static synchronous compensator structure in the prior art needs a real-time DC bus voltage control system to control the DC bus voltage within a stable range, which increases the The complexity of system control increases the cost

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  • System and method for suppressing sub-synchronous resonance of generating set
  • System and method for suppressing sub-synchronous resonance of generating set
  • System and method for suppressing sub-synchronous resonance of generating set

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Embodiment Construction

[0039] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.

[0040] The device of the invention combines the energy storage system with the fully-controlled converter equipment, and is connected in parallel with the generator set to provide a fully controllable system damping adjustment, which can effectively suppress the subsynchronous oscillation problem of the power grid system, and has fast response speed and high tracking accuracy , The system is stable and reliable, which can greatly improve the stability and reliability of the power grid.

[0041] Figure 1a A system 100 for su...

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Abstract

The invention provides a system and method for suppressing sub-synchronous resonance of a generating set. The system comprises a controller and a sub-synchronous resonance suppression device, wherein the controller judges an operation mode of a generating set system according to generator end voltage or frequency information of the generating set and outputting a signal to the sub-synchronous resonance suppression device when the sub-synchronous resonance occurs; the sub-synchronous resonance suppression device comprises full-controlled convertor equipment and an energy storage system; and the full-controlled convertor equipment generates and controls amplitude and phase of damping current injected in a power grid to suppress the sub-synchronous resonance. The system and the method for suppressing the sub-synchronous resonance of the generating set have the beneficial effects of providing a greater damping current to obtain better / faster resonance suppression effects by injecting an active power current while injecting the passive power.

Description

technical field [0001] The invention relates to the technical field of power system stability and control, in particular to a system and method for suppressing subsynchronous resonance, and the application of an energy storage system and a fully-controlled power electronic conversion device in power system operation stability control. Background technique [0002] With the increase of long-distance large-capacity transmission lines, in order to improve the transmission capacity and system stability of long-distance transmission, more and more high-speed control devices based on power electronics technology such as fixed series capacitor compensation and high-voltage direct current transmission are used in the power grid. However, this type of device may cause subsynchronous oscillation of the system under certain conditions, causing the shaft system of the unit to vibrate, affecting the life of the unit, and even seriously affecting the safe and stable operation of the unit a...

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Application Information

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IPC IPC(8): H02J3/38H02P9/00
Inventor薛飞谢小荣王澍牟镠峰
Owner北京睿能世纪科技有限公司