基于锥互补法的crowbar投入DFIG风电机群电磁暂态等值  

Electromagnetic transient equivalent of DFIG wind generator group with crowbar using CCA

作　　者：舒进[1] 袁剑[2] 都劲松[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710043 [2]华能新能源股份有限公司,北京100036

出　　处：《电力系统保护与控制》2016年第22期122-128,共7页Power System Protection and Control

基　　金：华能集团总部科技项目(HNKJ14-H22)

摘　　要：为降低对大规模风电机群故障暂态仿真计算量,首先给出同步坐标系crowbar投入DFIG风电机组及其机群状态空间模型。其次,基于H?范数最优化动态降阶方法,提出DFIG风电机群等值问题。对参数及运行状态各不相同DFIG机群,在降低原模型状态量数量的同时,实现阶系统与原模型故障电气量输出范数误差极小化。进一步,采用CCA算法将降阶等值转化为非凸优化问题,求解降阶等值模型。最后,针对非平衡初始状态,给出了等值模型初值的计算方法。仿真结果表明等值计算方法能够在有效实现降阶等值的同时,定量给出等值模型范数误差。In order to reduce the electromagnetic transient simulation of large scale wind generator group, the state space model of DFIG wind generator group with crowbar in synchronous coordinate is introduced firstly, and the equivalent scheme of DFIG wind generator group using H∞ norm optimization is discussed. The scheme can reduce the state variables and minimize the fault electric quantity H？ norm error of the equivalent model and original model, which has the different parameters and states. Then, the Cone Complementary Algorithm which transforms the order reduction to non-convex optimization is presented to get the equivalent model. The initial value of the non-equilibrium equivalent model is decided with a method based on the corresponding differential equality finally. Simulation shows that the proposed scheme can achieve the equivalent model and the reduction error.

关 键 词：DFIG风电机组 故障 等值 锥互补法 H∞范数 

分 类 号：TM614[电气工程—电力系统及自动化]