Method and device for optimizing subsynchronous oscillation of synchronous machine based on HVDC rectifier side converter
A technology of sub-synchronous oscillation and synchronous oscillation, applied in the direction of reducing/preventing power oscillation, power transmission AC network, single-network parallel feeding arrangement, etc., can solve synchronous generator speed feedback error, lag, and cannot be synchronously and effectively input synchronously Problems such as generator subsynchronous oscillation suppressor, to achieve accurate results, fast speed, and suppress subsynchronous oscillation
Inactive Publication Date: 2018-01-23
CHINA SOUTHERN POWER GRID COMPANY +1
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[0008] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and device for optimizing synchronous machine sub-synchronous oscillation for HVDC (high-voltage direct current, high-voltage direct current) rectifier side converters, thus solving the existing synchronous The generator subsynchronous oscillation method suffers from synchronous generator speed feedback errors and serious lags, and it is impossible to timely and effectively invest in synchronous generator subsynchronous oscillation suppressors; adopting multi-channel split-mode control SSDC for each torsional vibration mode may have an impact Technical issues with other generator sets
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[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0041] like figure 1 As shown, a method for optimizing synchronous machine subsynchronous oscillation based on HVDC rectifier side converter, including:
[0042] (1) Obtain the three-phase AC voltage V of the commutation bus of the HVDC rectification side converter of the HVDC closed-loop control system ABC , for three-phase AC voltage V ABC Perform phase-locking processing and subsynchronous...
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The invention discloses a method and device for optimizing subsynchronous oscillation of a synchronous machine based on an HVDC rectifier side converter. The method comprises the steps of obtaining three-phase AC voltage VABC of a converter bus of the HVDC rectifier side converter of an HVDC closed-loop control system, carrying out phase locking treatment and subsynchronous frequency conversion onthe three-phase AC voltage VABC to obtain to-be-damped subsynchronous oscillation modes and reserving the subsynchronous oscillation modes by using a band-pass filter; initiating subsynchronous oscillation through the HVDC closed-loop control system and then obtaining to-be-compensated phase angles of various subsynchronous oscillation modes according to a test signal method; and compensating a phase change caused by the HVDC closed-loop control system by using the phase angles and suppressing the subsynchronous oscillation initiated by the HVDC closed-loop control system. The suppression capability of a power system on the subsynchronous oscillation can be strengthened by using phase angle compensation, device upgrading and reconstruction of an existing converter are not needed, controlimplementation is simple and expansion is facilitated.
Description
technical field [0001] The invention belongs to the field of electric power system stability control, and more specifically relates to a method and a device for optimizing synchronous machine-order synchronous oscillation based on an HVDC rectifying side converter. Background technique [0002] The synchronous generator is one of the most important power supply equipment in the power system, with high economic value. The safe and stable operation of the synchronous generator plays an important role in the safety and stability of the power system. The sub-synchronous oscillation of synchronous generator belongs to the system oscillation instability. With the gradual increase of the unit capacity of the turbo synchronous generator, the shafting of the generator becomes more slender, and the characteristics of the shafting reflect more mechanical flexibility. It is easier to cause this kind of special electromechanical coupling interaction, which can seriously damage the power ...
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IPC IPC(8): H02J3/38H02J3/24H02J3/36
CPCY02E60/60
Inventor 李文朝刘恺韦鑫侯佳佐胡荣万民惠陈家乐朱建行龚轩
Owner CHINA SOUTHERN POWER GRID COMPANY
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