种直流输电系统换流阀触发角控制方法和控制系统

• Format: Patent
• Language: Chinese
• Published: 25.01.2019
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

本发明涉及种直流输电系统换流阀触发角控制方法和控制系统，在对逆变侧的换流阀进行触发角控制时：当直流电流上升或者换相电压下降时，且熄弧角下降到设定的预测控制整定值时，对换流阀采用熄弧角预测控制策略，根据直流电流和换相电压求解出当熄弧角等于设定的预测控制整定值时换流阀的触发角，以实现对换流阀的触发角的控制。该控制方式具有预测控制能够通过系统运行情况的实时变化来确定触发角的优点，同时利用该控制策略的优点，克服了传统的控制方法的缺陷。而且，该控制方法完全满足相关标准的要求，所需参数调节方便，控制特性好；能够提高系统运行的稳定性，抑制换相失败的发生。 The present invention relates to a control method and a control system of a converter valve trigger angle of a direct current transmission system. Controlling a trigger angle of a converter valve on an inverter side comprises: when a direct current increases or a commutation voltage decreases, and an extinction angle decreases to a set predictive control setting value, applying an extinction angle predictive control policy to the converter valve; and according to the direct current and the commutation voltage, solving the trigger angle of the converter valve of the time when the extinction angle is equal to the predictive control setting value, in order to control the trigger angle of the converter valve. The control manner has an advantage