Converter transformer tap control method based on ALPHA-VDIO_R coordination control
A technology of coordinated control and control method, applied in the direction of power transmission AC network, parallel feeding arrangement of single network, etc., can solve the problems of large fluctuation range of inverter trigger angle and frequent action of fixed-angle control taps, so as to alleviate the frequent Action, improve the effect of large trigger angle, and optimize distribution
Active Publication Date: 2021-06-15
国网山西省电力公司超高压变电分公司 +1
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[0004]
In order to solve the problems of frequent actions of the traditional fixed-angle control tap and the large fluctuation range of the trigger angle of the constant-voltage control converter, the present invention designs a converter transformer based on ALPHA-VDIO_R coordinated control for the defects of the existing technology. Joint control method
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[0049] The present invention is based on ALPHA-VDIO_R coordinated control converter tap control method, the method is specifically developed as follows:
[0050]Step 1. Select the target interval of the two variables participating in the coordinated control. The interval limit should be appropriately relaxed compared with the interval limit under the single control mode. Generally, when the fixed angle control is adopted, the trigger angle α: [12.5°~18.5° ], when using constant voltage control, no-load DC voltage Vdio: [0.99pu~1.01pu]. The present invention selects target intervals: trigger angle α: [12°-20°]; no-load DC voltage Vdio: [0.97pu-1.03pu]. The selection of the limit value of the no-load DC voltage must avoid the possible voltage stress of the equipment.
[0051] Step 2. Judging the installation location and operating condition of the converter transformer tap.
[0052] The present invention considers that the tap is set on the primary side of the converter transf...
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The invention belongs to the technical field of converter transformer joint control applied to a rectifier station of an extra-high voltage direct current power transmission system and relates to a converter transformer joint control method based on ALPHA-VDIO_R coordination control. According to the method of the invention, the problems of frequent action of a traditional fixed-angle control tap and large fluctuation range of a trigger angle of a fixed-voltage control converter are solved. According to the control method, by monitoring the out-of-limit conditions of the trigger angle alpha and the no-load direct-current voltage Vdio in a fixed period, the judgment logic of coordinated control is designed; and corresponding tap lifting or locking signals are output according to the judgment result; and therefore, the action times of the tap are effectively reduced, the operation and maintenance investment of the station end of a rectification station is reduced, the trigger angle distribution is improved, and the utilization efficiency of the converter is improved. The method is suitable for the technical field of rectification side converter tap control in an extra-high voltage direct current transmission system under rectification side converter constant current control and inversion side converter constant voltage control modes, and has the advantages of flexibility, controllability and advantage complementation.
Description
technical field [0001] The invention relates to the technical field applied to the control of converter transformer taps in rectifier stations of UHVDC power transmission systems, in particular to a converter transformer tap control method based on ALPHA-VDIO_R coordinated control. Background technique [0002] High-voltage direct current transmission technology has the advantages of high transmission power, good stability, fast adjustment, and reliable operation. It plays a pivotal role in long-distance power transmission, system interconnection, and cross-regional and cross-network optimization of power resources and improvement of resource utilization efficiency. . The HVDC transmission system mainly realizes the stable operation and transient transition of the DC transmission system through the DC voltage of the rectifier station or the inverter station, the no-load DC voltage, the trigger angle, and the arc extinguishing angle. Its main control links are divided into c...
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IPC IPC(8): H02J3/36H02J3/38
CPCH02J3/36H02J3/38Y02E60/60
Inventor 王克胜高晋文姚兆民张锋郝成龙赵彦平刘伟张峥樊宏宇王小波王祎凡任春光
Owner 国网山西省电力公司超高压变电分公司