CAJ | 학술논문

为了提高双馈风电机组在电网电压故障过程中的耐受能力，延长机组不脱网时间，提高系统无功输出能力，在双馈风电机组中的变流器直流侧加装超级电容储能设备。分析了超级电容的工作状态，推导了容值的计算公式以及该控制策略下系统的无功功率极限。在PSCAD软件中建立了双馈风电机组以及相关控制系统的模型，并进行了仿真验证。仿真结果显示加装超级电容可以增强系统稳定性，延长机组故障下的不脱网时间，并且提高了无功输出能力。
위료제고쌍궤풍전궤조재전망전압고장과정중적내수능력，연장궤조불탈망시간，제고계통무공수출능력，재쌍궤풍전궤조중적변류기직류측가장초급전용저능설비。분석료초급전용적공작상태，추도료용치적계산공식이급해공제책략하계통적무공공솔겁한。재PSCAD연건중건립료쌍궤풍전궤조이급상관공제계통적모형，병진행료방진험증。방진결과현시가장초급전용가이증강계통은정성，연장궤조고장하적불탈망시간，병차제고료무공수출능력。
To enhance tolerance of the doubly-fed wind turbine during the grid voltage fault,extend the time for the unit to remain on grid,improve the system’s reactive power output capability,a supercapacitor energy storage equipment is installed at the DC side of the doubly-fed wind generator.The supercapacitor working condition was analyzed,the way to calculate its capacity value as well as the reactive power limit of the system was derived.A doubly-fed wind generator model as well as control systems were established and simulated in PSCAD.The simulation results show that the installation of the supercapacitor can enhance system stability,extend time for the unit to remain on grid under grid fault and increase system reactive power output capability.