特高压直流接入孤立双馈风电场的控制方法

• Format: Patent
• Language: Chinese
• Published: 17.07.2018
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; 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

本发明涉及特高压直流接入孤立双馈风电场的控制方法，根据当前超级电容电压和给定的超级电容电压参考值和系统频率参考值计算当前的系统频率，输出新的系统频率参考值；根据当前的直流送端交流母线(B1)的电压和给定的母线(B1)电压参考值计算当前三相调制信号的幅值修正值；计算满足系统频率参考值和调制信号幅值修正值的三相正弦调制信号，进而得到触发脉冲，控制VSC运行。根据不平衡功率特征量提取机制，制作特高压直流接入孤立双馈风电场的暂态不平衡功率控制器，再建立该控制器与特高压直流调节之间的协调控制而达到孤立双馈风电场的特高压直流外送系统的稳定运行。 The invention relates to a method for controlling an extra-high-voltage direct current to be accessed to an isolated doubly-fed wind power station. The method is characterized by, according to the current voltage of a super capacitor and a given voltage reference value of the super capacitor as well as a system frequency reference value, calculating current system frequency and outputting a new system frequency reference value; calculating an amplitude correction value of a current three-phase modulation signal according to the current voltage of a DC sending-end AC bus (B1) and a given voltage reference value of the bus (B1); and calculating the three-phase sine modulation signal meeting the system frequency reference value and the modulation