一种新型风力发电用电压跌落发生器
摘要：低电压穿越能力是各国风电场并网规程对风电机组提出的最具挑战性的要求之一。风电机组在低电压穿越期间的性能和过电流的大小除了和故障的类型有关外，还和故障发生时电网电压的相位有关。为了研究和测试风电机组在最严峻的故障情况下的低电压穿越性能，研制了一种采用交流无触点开关的基于阻抗形式的电网电压不对称跌落发生器，应用电阻-电容-二极管吸收电路吸收绝缘栅双极型晶体管两端的过电压，采用改进的反正切函数准确计算电网电压相位角，采用单片机作为控制器。实验结果表明该装置能够比较准确地在电网设定相位模拟电网不对称电压跌落故障，且该装置结构简单，实现方便，制作成本相对较低，实用性较强。
Abstract:Low voltage ride through capability is one of the most challenging requirements to the wind power generation unit in the operating instruction for wind farms all around the world. The performance of the wind power generation unit in the course of the low voltage ride through and the magnitude of the current not only relates to type of the failure, but also to the phase of power grid voltage while the fault occurs. To research and measure the low voltage ride-through performance of wind power generation unit under the most serious failure situation, adopting AC contactless switch an impedance form based power network voltage asymmetrical sag generator was developed to absorb the overvoltage at both ends of insulated gate bipolar transistor (abbr. IGBT) by the absorbing circuit composed by resistance-capacitance-diode (abbr. RCD), besides, the phase angle of power network voltage was computed by the improved arctangent function and the single-chip microcomputer was used as the controller. Experiment results show that the developed device can fairly accurately simulate the fault of power network voltage asymmetrical sag at the given phase angle of power network, and it possesses such advantages as simple in structure, convenient to achieve, relative low manufacturing cost and good practicability.
标题：一种新型风力发电用电压跌落发生器
英文标题：A Novel Voltage Sag Generator for Wind Farm
作者：武浩, 王淑红, 曹建文, 郜瑞腾, 王一帆,
关键词：电压跌落发生器, 电网相位, 交流无触点开关, 吸收电路, 相位角计算, ,
发表日期：2021-04-10
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