利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN108023367A 一种含光热发电的混合电力系统负荷频率控制方法 审中-实审

一种含光热发电的混合电力系统负荷频率控制方法
摘要：
本发明涉及一种含光热发电的混合电力系统负荷频率控制方法，时滞电力系统分为三个区域，Ⅰ区包含光热发电系统、火力发电系统和风力发电系统，Ⅱ、Ⅲ区包含火力发电子系统和风力发电子系统。所述的负荷频率控制方法包括：(1)建立各个区域的数学模型；(2)建立各区域的状态模型，该状态模型中考虑系统参数的不确定项及负荷波动引起的干扰；(3)根据状态模型，设计带有积分的滑膜切换面Si(t)；(4)根据所设计的切换面，设计负荷频率控制器ui(t)，并将ui(t)作为控制指令，进行电力系统负荷频率控制。本发明考虑了电力系统的通信延迟，光热发电系统参与调频，有效解决风力发电并网的波动性问题，且控制精度高、鲁棒性强，可以减小频率偏差。
摘要（英）：

The invention relates to a load frequency control method for a photo-thermal power generation-contained hybrid power system. A time-lag power system is divided into three regions, namely I region, IIregion and III region. The I region contains a photo-thermal power generation system, a thermal power generation system and a wind power generation system. The II region and the III region comprise athermal power generation subsystem and a wind power generation subsystem. The load frequency control method comprises the following steps of (1) establishing a mathematical model of each region; (2) establishing a state model of each region, wherein the interference caused by the uncertain terms of system parameters and the load fluctuation are taken into consideration for the state model; (3) according to the state model, designing a sliding film switching surface Si(t) with an integral; (4) according to the designed switching surface, designing a load frequency controller ui(t), adopting theui(t) as a control instruction, and controlling the load frequency of the power system. According to the invention, the communication delay of the power system is considered. The photo-thermal powergeneration system participates in frequency modulation, so that the fluctuation problem of a wind power generating set is effectively solved. The method is high in control precision and strong in robustness. The frequency deviation can be reduced.

0/0