• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2017, Vol. 38 ›› Issue (3): 34-.doi: 10.3969/j.issn.1000-7229.2017.03.005

• 智能电网 • 上一篇    下一篇

 基于动态降阶模型的电力系统非线性电压预测控制

 兰晓明1,王颖2,赵洪山1,米增强1   

  1.  1.华北电力大学电气与电子工程学院,河北省保定市 071003;
    2. 国网河北省电力公司经济技术研究院,石家庄市 050021
  • 出版日期:2017-03-01
  • 作者简介:兰晓明(1987),男,博士研究生,本文通信作者,主要从事电力系统动态模型以及非线性预测控制算法等方面的研究工作; 王颖(1975),女,硕士,高级工程师,主要从事电网规划等方面的研究工作; 赵洪山(1965),男,教授,主要从事电力系统混杂建模、动态分析与控制以及电力系统优化计算等方面的研究工作; 米增强(1960),男,教授,博士生导师,主要从事风电场建模与接入系统分析、风电场监控系统、风电场发电功率预测等方面的研究工作。
  • 基金资助:
     国家自然科学基金项目(51077053)

 Nonlinear Voltage Prediction Control of Power System Based on Dynamic Reduced Model

 LAN Xiaoming1, WANG Ying2, ZHAO Hongshan1, MI Zengqiang1   

  1.  1. School of Electrical and Electronics Engineering North China Electric Power University, 
    Baoding 071003, Hebei Province, China; 2. Economic and Technology Research Institute, State Grid Electric
     Power Company of Hebei Province, Shijiazhuang 050021, China
  • Online:2017-03-01
  • Supported by:
     Project supported by National Natural Science Foundation of China(51077053)

摘要:  传统电压控制多采用潮流方程,电压可能在到达事故后稳定运行点前的过渡过程中失稳,因此基于系统的动态模型进行电力系统电压控制十分必要。该文提出了一种基于动态降阶模型的非线性电压预测控制方法。为降低优化计算时间,结合电力系统的特点对经验Gramian平衡降阶方法加以改进,并应用改进的经验Gramian平衡降阶方法降低电力系统非线性动态模型的维数。为提高模型计算精度和数值稳定性,提出使用4阶收敛的Adams法替代欧拉法进行状态预测,建立基于降阶模型的多步预测-滚动优化模型。此外,在模型求解过程中使用温启动方法和较小的迭代次数限值Nmax来减少迭代次数。以New England 10机39节点电力系统对所提出的方法进行验证。结果表明,所提出的方法能够提高预测模型的数值稳定性,极大地降低模型求解时间,有利于提前响应系统中可预测的动态变化,维持系统电压稳定。

 

关键词:  , 电力系统, 电压控制, 动态模型, 模型预测控制(MPC), 模型降阶

Abstract:  Due to the use of power flow equation in tradition voltage control, the voltages may lose its stability in the transition process form the failure to the stable operating point. It is necessary to consider dynamic model of power system in voltage study. This paper presents a nonlinear voltage predictive control method based on dynamic reduced model. In order to decrease the optimal calculating time, the improved empirical Gramian balance reduction method based on the features of power system is applied to reduce the order of power system nonlinear dynamic model. In order to improve the accuracy and numerical stability of predictive model, this paper uses a 4-order convergent Adams method instead of Euler method to predictive state values, and develops a multi-step prediction and rolling optimization model based on reduced model. In addition, the warm start technique and a small iterative times limit Nmax are used to decrease the iterative times in the solving process. The New England 10-generator and 39-bus power system is simulated to test the performance of the proposed method. The simulation results show that this method can not only increase the predictive model numerical stability and decrease the optimal-timing greatly, but also respond the predictable dynamic change of the system in advance to keep voltage stable.

 

Key words:  power system, voltage control, dynamic model,  model predictive control(MPC), model reduction

中图分类号: