基于提升华北电网考核指标的飞轮储能参与调频划分电量控制策略

doi:10.19799/j.cnki.2095-4239.2022.0653

储能科学与技术 ›› 2023, Vol. 12 ›› Issue (4): 1176-1184.doi: 10.19799/j.cnki.2095-4239.2022.0653

基于提升华北电网考核指标的飞轮储能参与调频划分电量控制策略

刘海山¹^,²(), 徐宪龙¹^,², 魏书洲¹^,², 逄亚蕾³, 洪烽³()

^1.三河发电有限责任公司
^2.河北省燃煤电站污染防治技术创新中心，河北廊坊 065201
^3.华北电力大学控制与计算机工程学院，北京 102206

收稿日期:2022-11-07 修回日期:2023-01-03 出版日期:2023-04-05 发布日期:2023-05-08
通讯作者: 洪烽 E-mail:1036977736@qq.com;hongf@ncepu.edu.cn
作者简介:刘海山（1975—），男，硕士，高级工程师，从事火电厂管理工作，E-mail：1036977736@qq.com；
基金资助:
国家能源集团科技创新项目(GJNY-21-170)

Flywheel energy storage participates in frequency modulation power division control based on improving power grid assessment index of north China power grid

Haishan LIU¹^,²(), Xianlong XU¹^,², Shuzhou WEI¹^,², Yalei PANG³, Feng HONG³()

^1.Sanhe Power Generation Co. , Ltd.
^2.Hebei Innovation Center for Coal-fired Power Station Pollution Control, Langfang 065201, Hebei, China
^3.School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China

Received:2022-11-07 Revised:2023-01-03 Online:2023-04-05 Published:2023-05-08
Contact: Feng HONG E-mail:1036977736@qq.com;hongf@ncepu.edu.cn

摘要/Abstract

摘要：

在“双碳”目标的背景下，以风光为主体的具有明显随机性和波动性的新能源大规模并网，接入电网后容易造成电网频率波动，严重威胁电网安全。储能技术辅助调频主力的火电机组参与发电侧一次调频可以有效提升电网安全性和机组运行经济性。为充分利用飞轮储能辅助电网调频的优势，考虑储能当前电量对调频影响，建立火-储联合模型，分析火电-飞轮联合系统调频能力。本工作针对电网频率特性及机组调频特点，以满足调频指标为要求，充分考虑储能当前电量对调频性能的影响，提出一种基于提升华北电网考核指标的飞轮储能参与调频划分电量下垂控制策略。该策略根据飞轮储能当前电量进行计算，在不同电量时采用不同出力时间限制，以尽力满足电网一次调频考核指标。同时，利用MATLAB/Simulink软件分析了在负荷扰动下系统的调频效果及调频资源的出力情况。结果表明所提方法能够在飞轮储能电量处在不同状况时，利用不同放电时间来有效改善机组调频性能，提高机组量化指标。

关键词: 飞轮储能, 一次调频, 小规模储能, 划分电量, 量化指标

Abstract:

Given the estimations that carbon emissions will peak by 2030 and carbon neutrality will be achieved by 2060 in China, large-scale new energy sources, with wind and solar as the main force, are connected to the grid. The increase in energy consumption leads to serious environmental problems. This may be resolved by using new energy, and accordingly, the structure of power generation has undergone significant changes. The large-scale grid-connected new energy is associated with randomness and volatility. In addition, grid frequency fluctuation can be easily caused after penetrating the power grid, and this seriously threatens the safety of the grid. This issue can be resolved by improving the frequency modulation supported by the power generation side. An energy storage system integrated with thermal power units participates in the primary frequency modulation, resulting in improved security of power grids and improved economic efficiency. To realize the advantages of flywheel energy storage auxiliary frequency modulation of the power grid, the frequency modulation capability of the combined thermal power-flywheel system was analyzed based on the model, considering the influence of current energy storage on frequency modulation. In this regard, this paper proposes a control strategy for flywheel energy storage participating in frequency modulation division based on improving the power grid assessment index of the north China power grid. The strategy is calculated according to the current electric quantity of flywheel energy storage, and different output time limits are adopted in different electric quantities to meet the primary frequency regulation assessment index of the power grid. The frequency modulation effect of the system and the output of frequency modulation resources under load disturbance are analyzed using MATLAB/Simulink software. The results show that the proposed method can effectively improve the frequency modulation performance of the unit and improve the quantitative index of the unit with different discharge times under different conditions of the flywheel energy storage. Thus, the proposed method provides good support to the frequency modulation index at different power levels and effectively improves the economic assessment and efficiency of a power plant.

Key words: flywheel energy storage, primary frequency modulation, small-scale energy storage, dividing electric quantity, quantitative indicators

中图分类号:

TM 61

刘海山, 徐宪龙, 魏书洲, 逄亚蕾, 洪烽. 基于提升华北电网考核指标的飞轮储能参与调频划分电量控制策略[J]. 储能科学与技术, 2023, 12(4): 1176-1184.

Haishan LIU, Xianlong XU, Shuzhou WEI, Yalei PANG, Feng HONG. Flywheel energy storage participates in frequency modulation power division control based on improving power grid assessment index of north China power grid[J]. Energy Storage Science and Technology, 2023, 12(4): 1176-1184.

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特征参数	数值
K	6
P	1/315
P₀	0.01
b	0.4
r	13

主要参数	数值
调速器时间常数T_g/s	0.1
机组功频特性系数R	0.05
高压蒸汽容积时间常数T_CH/s	0.3
中压蒸汽容积时间常数T_RH/s	10
低压蒸汽容积时间常数T_CO/s	0.5
高压缸功率系数F_HP	0.3
中压缸功率系数F_IP	0.3
低压缸功率系数F_LP	0.4
发电机惯性常数H	2
发电机负荷阻尼系数D	12

主要参数	数值
定子电阻R_s/Ω	0.097
永磁磁链Ψ_f/Wb	0.1286
粘滞摩擦系数B/(N·m·s)	1100
定子电感L/mH	2.085
极对数n_p	2
飞轮转动惯量J/(kg·m²)	24.2

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基于提升华北电网考核指标的飞轮储能参与调频划分电量控制策略

Flywheel energy storage participates in frequency modulation power division control based on improving power grid assessment index of north China power grid

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