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An online self-tuning system for phase-shift control parameters of a subsynchronous oscillation suppression system

A subsynchronous oscillation and phase-shift control technology, applied in the direction of reducing/preventing power oscillation, can solve the problems of being prone to errors, increasing the probability of errors, cumbersome offline calculation process, etc., and reducing the test workload.

Active Publication Date: 2021-02-26
NR ELECTRIC CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The offline calculation process is cumbersome and error-prone, and manually setting the calculation results into the device also increases the probability of error

Method used

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  • An online self-tuning system for phase-shift control parameters of a subsynchronous oscillation suppression system
  • An online self-tuning system for phase-shift control parameters of a subsynchronous oscillation suppression system
  • An online self-tuning system for phase-shift control parameters of a subsynchronous oscillation suppression system

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing: a kind of subsynchronous oscillation damping control system based on SVG is made up of three parts, comprises subsynchronous damping control device, SVG and isolation transformer, as figure 1 shown. When the working mode switching switch K is connected to the lower end, the system works in the closed-loop suppression control mode. The subsynchronous oscillation damping control device receives the speed signal of the unit, combines with the current and voltage information of the generator, detects the torsional vibration state of each mode of the subsynchronous oscillation, and calculates The sub-synchronous damping control signal is sent to the SVG controller. The SVG system injects sub-synchronous and super-synchronous compensation currents into the machine-grid system by using power electronic conversion technology. There is sub-synchronous electromagnetic torque with oppos...

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Abstract

The invention discloses an online self-tuning system for phase-shift control parameters of a subsynchronous oscillation suppression system. The online self-tuning system for phase-shift control parameters of a subsynchronous oscillation suppression system includes: a rotational speed signal modal filter unit, a filter delay compensation unit, A waveform transformation unit, a phase shift angle generation unit, and a phase shift controller generation unit. The subsynchronous oscillation suppression system works in the open-loop control parameter test mode. According to the set torsional vibration frequency and amplitude, the subsynchronous damping control command signal in the form of a sine wave is output within a certain period of time, and the compensation current is generated by the power electronic power unit. , injected into the generator set to excite the torsional vibration response of the shafting. The sub-synchronous damping control command signal and the generator speed signal are collected and sent to the online self-tuning system, and the signal analysis and calculation are automatically completed, and the calculation results are stored in the corresponding fixed value items. This method does not require human participation in offline calculation, which greatly reduces the workload of setting calculation.

Description

technical field [0001] The invention relates to the technical field of subsynchronous oscillation in power systems, in particular to an online self-tuning system for phase shift control parameters of a subsynchronous oscillation suppression system. Background technique [0002] For those "point-to-grid" power plants with long-distance power transmission through series compensation or direct current transmission, the power system is prone to subsynchronous oscillation, which will cause torsional vibration of the shafting of the turbo-generator set. At present, in order to suppress the torsional vibration of the shaft system and reduce the damage to the main shaft of the generator caused by the subsynchronous oscillation, control links are added to the control system such as power electronics, such as the additional excitation damping control system (SEDC), static compensator (SVC, SVG, etc. ), NGH dampers, etc. Since the excitation control system, SVC, and SVG are all mass-p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 王凯张琦雪王光陈俊陈佳胜郭自刚李华忠
Owner NR ELECTRIC CO LTD
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