Dynamic characteristics of liquefied air energy storage system participating in frequency regulation of power grid

LIANG Danxi; DENG Zhanfeng; CUI Shuangshuang; LU Chang; BAI Ziwei; XU Guizhi; SONG Jie; HE Qing

doi:10.19666/j.rlfd.202005122

English

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Dynamic characteristics of liquefied air energy storage system participating in frequency regulation of power grid

Thermal Power Generation Vol. 49, Issue 8, Pages: 104-110(2020)

更新时间：2025-09-28

- Dynamic characteristics of liquefied air energy storage system participating in frequency regulation of power grid
- 作者机构：
  
  1. 全球能源互联网研究院有限公司
  2. 华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202005122
  CLC： TK02;TK268
- Published Online：30 July 2020，
  
  Published：2020
- 稿件说明：
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LIANG Danxi, DENG Zhanfeng, CUI Shuangshuang, et al. Dynamic characteristics of liquefied air energy storage system participating in frequency regulation of power grid[J]. Thermal Power Generation, 2020, 49(8): 104-110.
DOI：

LIANG Danxi, DENG Zhanfeng, CUI Shuangshuang, et al. Dynamic characteristics of liquefied air energy storage system participating in frequency regulation of power grid[J]. Thermal Power Generation, 2020, 49(8): 104-110. DOI： 10.19666/j.rlfd.202005122.

摘要

为深入研究液化空气储能系统参与电网调频的动态特性

基于液化空气储能系统的数学模型

建立了12.5 MW液化空气储能机组膨胀系统的仿真模型

并结合无穷大电网模型

模拟了储能系统在空载冲转、并网以及电网调频工况下的参数变化

分析了液化空气储能系统作为新的辅佐新能源电网调频技术的可行性及其动态特性。仿真结果表明:空载冲转过程中

膨胀机转子转速标幺值最大为1.013

超速比为1.3%;并网发电过程中

实际转速标幺值和实际电功率标幺值在765 s时稳定至1;电网调频过程中

实际功率标幺值在10 s内稳定至0.990

且在调频过程中实际电功率标幺值最高为1.032。本研究为了解液化空气储能系统参与电网调频的动态特性提供了数据参考。

Abstract

To deeply study the dynamic characteristics of liquefied air energy storage system participating in frequency regulation of the power grid

the simulation model of the expansion system of a 12.5 MW liquefied air energy storage was established based on the mathematical model. Combined with the infinite grid model

the parameter changes of the energy storage system under no-load impulse

grid connection and frequency regulation were simulated

and the feasibility and dynamic characteristics of the liquefied air energy storage system as a new auxiliary power grid frequency regulation technology were analyzed. The simulation results show that

the maximum unit value of the expander rotor speed during no-load impulse is 1.013

and the overspeed ratio is 1.3%.During grid-connected power generation

the actual speed unit value and the actual electric power unit value are stable to 1 at 765 s. In the process of grid frequency regulation

the actual power unit value stabilizes to 0.990 within10 s

and the highest actual power unit value is 1.032. This study provides a data reference for understanding the dynamic characteristics of liquefied air energy storage systems participating in grid frequency regulation.

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