附加转速优化虚拟惯性控制的双馈风机一次调频研究  

Primary Frequency Regulation of Doubly-fed Induction Generator Based on Additional Speed Optimization Virtual Inertia Control

作　　者：徐鹏超 李琰 田新首 赵艳雷[1] 郑广泛 XU Peng-chao;LI Yan;TIAN Xin-shou;ZHAO Yan-lei;ZHENG Guang-fan(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]山东理工大学电气与电子工程学院,淄博255000 [2]中国电力科学研究院有限公司,北京100192

出　　处：《科学技术与工程》2020年第23期9400-9407,共8页Science Technology and Engineering

基　　金：国家重点研发计划(2017YFB0902800);国家电网公司科技项目(52094017003D)。

摘　　要：双馈风机由于自身运行特性,不再具备同步发电机所具有的惯性响应能力,导致双馈风电机组大规模并网后,减弱电力系统中惯性响应能力,系统发生功率扰动后,不足以维持频率在规定范围内变动,对电力系统稳定运行产生不良影响。首先分析电力系统引入风电机组后,风机对电力系统的影响;提出双馈风电机组附加转速优化虚拟惯性控制策略,在传统虚拟惯性控制中添加转速优化模块,并与转子转速控制相结合,使风机转子释放或吸收能量更多且平缓,减少对电网的冲击,并在该控制策略中加入转子转速保护模块,防止转子转速过低或过高,从而导致风机切出电网或对风机造成损伤,使双馈风机组具有与常规同步发电机同样的特性;最后在电网发生负荷突变情况下,引入附加转速优化虚拟惯性控制和综合控制进行仿真,验证所提出控制策略在电网等效惯性进一步降低时的有效性。Due to its operation characteristics, the doubly-fed induction generator is lack of inertial response ability of synchronous generator which will weaken the inertial response ability in the power system on the large scale grid connected doubly-fed induction generator. After the power disturbance of the system, it is not able to maintain the frequency fluctuating in the prescribed range, which has an adverse effect on the stable operation of the power system. To deal with this, the influence of wind turbine on power system was analyzed at first, on this basis, the virtual inertial control strategy of additional speed optimization of doubly-fed induction generator was proposed, and the speed optimization module was added to the traditional virtual inertial control. Combine with rotor speed control, the rotor released or absorbed more energy in a smoother way, reducing the impact on the power grid. The rotor speed protection module was added in the control strategy to prevent the rotor speed from being too low or too high, which will cause the rotor to cut out the power grid or cause damage to the rotor, so that the doubly-fed induction generator unit has the same characteristics as the conventional synchronous generators. Finally, in the case of load mutation in the power grid, the additional speed optimization virtual inertia control and integrated control were introduced for simulation. The effectiveness of the proposed control strategy was verified if the system inertia was further reduced.

关 键 词：电力系统 双馈风机 转速优化 转速保护 虚拟惯性控制 负荷突变 

分 类 号：TM761[电气工程—电力系统及自动化]