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43页
1.从电网频率调整的原理出发,介绍了常规电网调频的运作方式和调频机理。在此基础上,介绍了电池储能系统的主要组成部分,电池储能系统参与电网调频的工作原理及优势。 2.本文在系统地总结储能电池参与电网二次调频研究现状、明确其存在的主要问题的基础上,围绕储能电池辅助常规火电机组参与电网二次调频,在控制方式、仿真模型、出力设计、控制策略四个方面展开研究。
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摘要
随着科技的发展,电力已成为最重要的资源之一,如何保证电力的供应对于
国民经济发展和人民生活水平的提高都有非常重要的意义。随着火力发电大规模
并网,其弱惯性、波动性和不确定性对电网安全与稳定运行带来了一系列影响,
常规调频机组爬坡速率低、响应速度慢等固有缺陷已经难以满足电网的调频需求,
引入更加优质的调频资源来提高电网调频能力具有迫切的现实工程意义。
本文在系统地总结储能电池参与电网二次调频研究现状、明确其存在的主要
问题的基础上,围绕储能电池辅助常规火电机组参与电网二次调频,在控制方式、
仿真模型、出力设计、控制策略四个方面展开研究。
从电力系统频率调整的原理出发,阐述了电力系统负荷及常规电源的频率特
性;基于常规机组二次调频过程的分析,对储能电池参与电网二次调频的控制方
式进行选择与论证,构建了储能电池参与电力系统二次调频的控制框图。
分析了当前常用的储能电池仿真模型及其特点、电网二次调频的功率需求特
点和储能电池参与二次调频的出力特征,论述了适用于二次调频的仿真模型要求
及常用电池储能电源模型存在的主要问题;在剖析电池储能电源的内部结构组成
及其参与二次调频的内在协调响应过程的基础上,提出了满足电网调频要求的电
池储能电源等效仿真模型,进而构建了含电池储能电源的两区域互联电网频率响
应模型。
关键词:火电机组;二次调频;储能电池;调频
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Abstract
With the development of science and technology, electric power has become one
of the most important resources. How to ensure the supply of electric power is of
great significance to the development of national economy and the improvement of
people's living standards. As large-scale power generation (dg), its weak inertia,
volatility and uncertainty of a series of influence on the security and stability of power
grid, conventional FM unit creep speed is low, the inherent defects such as slow
response has been difficult to meet the demand of the grid frequency control, the
introduction of more high-quality FM resources to improve the ability of power grid
frequency modulation has the urgent practical engineering significance.
On the basis of systematically summarizing the research status of energy storage
battery participating in secondary frequency modulation of power grid and clarifying
the main problems, this paper focuses on the control mode, simulation model, output
design and control strategy of energy storage battery assisting conventional thermal
power unit to participate in secondary frequency modulation of power grid.
Based on the principle of frequency adjustment of power system, the frequency
characteristics of power system load and conventional power supply are
described. Based on the analysis of secondary frequency regulation process of
conventional units, the control mode of energy storage battery participating in
secondary frequency regulation of power grid is selected and demonstrated, and the
control block diagram of energy storage battery participating in secondary frequency
regulation of power system is constructed.
This paper analyzes the simulation model of energy storage battery and its
characteristics, the power demand characteristics of secondary frequency modulation
and the output characteristics of energy storage battery participating in secondary
frequency modulation, discusses the requirements of simulation model suitable for
secondary frequency modulation and the main problems existing in common battery
energy storage power model. Based on the analysis of the internal structure of the
battery energy storage power supply and the internal coordination response process of
![](https://csdnimg.cn/release/download_crawler_static/88477988/bg3.jpg)
the battery energy storage power supply participating in the secondary frequency
modulation, the equivalent simulation model of the battery energy storage power
supply meeting the requirements of the power network frequency modulation was
proposed, and then the frequency response model of the two-area interconnected
power network with the battery energy storage power supply was constructed.
Key words: Thermal power unit; Secondary frequency modulation; Energy storage
battery; FM;
![](https://csdnimg.cn/release/download_crawler_static/88477988/bg4.jpg)
目录
摘要 ...................................................................................................................................................1
第 1 章 绪论 .....................................................................................................................................6
1.1 背景和意义 .......................................................................................................................6
1.2 火电机组参与调频技术的现状 .......................................................................................8
1.3 课题的研究内容及章节安排 .........................................................................................10
第 2 章 火电机组一、二次调频及储能系统的工作机理 ...........................................................11
2.1 火电机组一次调频的工作机理及技术指标 .................................................................11
2.2 火电机组二次调频的工作机理及技术指标 .................................................................12
2.2.1 二次调频的工作机理 .........................................................................................12
2.2.2 二次调频的技术指标 .........................................................................................15
2.3 储能系统工作原理 .........................................................................................................16
2.4 储能参与火电机组调频控制 .........................................................................................16
第 3 章 火电机组调频的控制策略 .............................................................................................17
3.1 火电机组融合储能协同调频优化控制策略设计 .........................................................17
3.1.1 火电机组融合储能协同调频工作机理 .............................................................17
3.1.2 火电机组融合储能协同调频控制策略优化 .....................................................18
3.2 储能系统参与一次调频控制策略优化 .........................................................................20
3.3 储能电池参与二次调频的控制方式 ...........................................................................22
3.3.1 储能电源参与二次调频控制策略 ...................................................................22
3.3.2 储能自适应调频工况 .......................................................................................23
3.4 储能系统参与二次调频控制策略优化 ..........................................................................23
3.4.1 储能电源参与二次调频控制策略优化 ...........................................................23
3.4.2 优化效果评估 ...................................................................................................25
第 4 章 火电机组调频控制策略优化 ...........................................................................................26
4.1 汽轮机转速测量改进 ...................................................................................................26
4.1.1 汽轮机转速精度不准的原因 ...........................................................................26
4.1.2 汽轮机转速精度的改进 ...................................................................................26
4.2 汽轮机控制逻辑改进策略 ...........................................................................................27
4.2.1 控制逻辑的功能改进 .......................................................................................27
4.2.2 优化后一次调频系统功能分析 .........................................................................28
第 5 章 火电机组融合储能协同调频建模及仿真 .....................................................................29
5.1 储能系统建模 ...............................................................................................................29
5.1.1 储能系统建模 ...................................................................................................29
5.1.2 储能系统参与火电机组调频模型 ...................................................................29
5.1.3 储能系统容量配置方法 ...................................................................................30
5.2 火电机组融合电储能系统协同调频模型 ......................................................................34
5.2.1 参数配置 ...........................................................................................................34
5.2.2 火电机组融合储能一次调频模型 ...................................................................34
5.2.3 火电机组融合储能二次调频模型 ...................................................................35
5.3 系统仿真及结果分析..................................................................................................35
5.3.1 火电机组融合储能一次调频仿真结果 .............................................................35
5.3.2 火电机组融合储能一次调频性能的对比分析 .................................................37
5.3.3 火电机组融合储能二次调频仿真结果 .............................................................37
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