中国电力 ›› 2015, Vol. 48 ›› Issue (3): 116-121.DOI: 10.11930.2015.3.116

• 新能源 • 上一篇    下一篇

光储联合发电系统建模及并网控制

甘思琦1,孔令国1,蔡国伟1,胡祥楠2   

  1. 1. 东北电力大学 电气工程学院,吉林省 吉林市 132012;
    2. 国网智能电网研究院,北京 102209
  • 收稿日期:2014-12-08 出版日期:2015-03-25 发布日期:2015-11-27
  • 作者简介:甘思琦(1990—),女,吉林省吉林市人,硕士研究生,从事新能源并网控制研究。E-mail: gsq1990521@163.com
  • 基金资助:
    国家高技术研究发展计划(863计划)项目(SS2014AA052502);国家自然科学基金资助项目(51177010)

Research on System Modeling and Grid Connection Characteristics of Large-scale PV-ES Hybrid Power System

GAN Siqi1, KONG Lingguo1, CAI Guowei1, HU Xiangnan2   

  1. 1. School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China;
    2. China Smart Grid Research Institute, Beijing 102209, China
  • Received:2014-12-08 Online:2015-03-25 Published:2015-11-27
  • Supported by:
    This work is supported by National High-tech R&D Program of China (863 program) and National Natural Science Foundation of China (51177010).

摘要: 大型光伏系统并网具有随机性强、波动幅度大以及电能质量不稳定等问题。建立了光储联合并网发电系统动态模型,提出了改善暂态电压稳定性和平抑功率波动联合发电控制策略。光伏单元采用了基于功率变化率最大功率控制算法及其定有功、无功双环解耦控制策略;储能单元利用电压和频率的设定值同测量值比较,从而得到功率控制参考值,通过对功率以及电流环的解耦控制实现同步并网。仿真验证了模型及其协调控制策略的有效性。

关键词: 电网, 大型光储, 系统建模, 平抑功率波动, 低电压穿越

Abstract: This paper presents a dynamic model and a coordinated control strategy for photo voltaic and energy storage hybrid power system. The proposed control strategy is able to effectively improve transient voltage stability and suppress power fluctuation of large scale grid-connected photo voltaic system. The maximum power control algorithm based on maximum power change rate is adopted in photo voltaic system along with decoupled power control method, while the power control reference is obtained from the error between real values and settings of voltage and frequency in energy storage system. The system synchronization is realized by decoupling control of power and current loop. The simulation result shows the validity of proposed model and control strategy, which consequently improve system low voltage ride-through ability and power grid stability.

Key words: Large-scale photovoltaic-energy storage(PV-ES), system modelling, power fluctuation suppression, low voltage ride through (LVRT)

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