基于权重系数校正的火储两阶段联合调频方法

doi:10.11930/j.issn.1004-9649.202303041

中国电力 ›› 2024, Vol. 57 ›› Issue (3): 83-94.DOI: 10.11930/j.issn.1004-9649.202303041

基于权重系数校正的火储两阶段联合调频方法

王益斌¹(), 陈飞雄¹(), 邵振国¹(), 张抒凌², 张伟骏², 李智诚²

1. 福州大学电气工程与自动化学院（福建省电器智能化工程技术研究中心），福建福州　350108
2. 国网福建省电力有限公司电力科学研究院，福建福州　350007

收稿日期:2023-03-08 出版日期:2024-03-28 发布日期:2024-03-26
作者简介:王益斌（1998—），男，硕士研究生，从事火储联合调频优化控制研究，E-mail：1119632731@qq.com
陈飞雄（1990—），男，博士，副教授，从事综合能源系统协同优化控制研究，E-mail：feixiongchen@fzu.edu.cn
邵振国（1970—），男，通信作者，博士，教授，从事综合能源系统协同优化控制研究，E-mail：shao.zg@fzu.edu.cn
基金资助:
国家自然科学基金青年基金资助项目（计及多能流不确定性的多微能网耦合系统分布式协同控制，52107080）；福建省自然科学基金青创项目（基于数据驱动的综合能源系统协同优化控制方法，2021J05135）；国网福建省电力有限公司科技项目（福建电网吉瓦级储能电站运行控制技术研究，521304200059）。

Two-stage Frequency Regulation Method for Energy Storage Coordinated with Thermal Power Unit Based on Weight Coefficient Correction

Yibin WANG¹(), Feixiong CHEN¹(), Zhenguo SHAO¹(), Shuling ZHANG², Weijun ZHANG², Zhicheng LI²

1. College of Electrical Engineering and Automation, Fuzhou University(Fujian Smart Electrical Engineering Technology Research Center), Fuzhou 350108, China
2. State Grid Fujian Electric Power Research Institute, Fuzhou 350007, China

Received:2023-03-08 Online:2024-03-28 Published:2024-03-26
Supported by:
This work is supported by National Natural Youth Science Foundation of China (Distributed Cooperative Control of Multi-micro-energy Network Coupling System Considering Multi-energy Flow Uncertainty, No.52107080), Natural Science Foundation of Fujian Province (Data-driven Collaborative Optimization Control Method for Integrated Energy System, No.2021J05135), Technology Project of State Grid Fujian Electric Power Co., Ltd. (Research on Operation Control Technology of Gigawatt Level Energy Storage Power Station in Fujian Power Grid, No.521304200059).

摘要/Abstract

摘要：

随着不确定性可再生能源大规模并网，电网频率特性日益复杂。传统火电机组具有响应时间长、无法准确跟踪指令等问题，亟须利用储能提高火电机组参与自动发电控制（automatic generation control，AGC）调频时的调节性能。首先，针对调频考核规则，建立调频性能指标数学模型，并考虑火储系统出力特性，结合改进层次分析法校正调频子指标权重系数，以此构建以调频性能最优为目标的第一阶段优化模型；在此基础上，为了减少储能荷电状态（state of charge，SOC）越限和深度充放情况，以储能SOC偏差最小为目标构建第二阶段优化模型。仿真验证表明：所提的两阶段调频方法能够提高火储联合系统的调频性能和调频收益，同时有效减少储能深度充放情况和工作寿命损耗，提高储能辅助调频服务的可持续性。

关键词: 调频辅助服务, 储能, 自动发电控制, 改进层次分析法, 两阶段调频

Abstract:

With the large-scale uncertain renewable energy connected to the grid, the frequency characteristics of the power grid are increasingly complex. Plagued by long response times and the inability to accurately track frequency regulation commands, traditional thermal power units call for urgent improvement in the performance of its participation in frequency regulation of automatic generation control (AGC) of thermal power by use of energy storage. Therefore, firstly, the mathematical model of frequency regulation performance index is established according to frequency regulation assessment rules. Besides, considering the output characteristics of the energy storage system, combined with the improved analytic hierarchy process to correct the weight coefficient of the frequency regulation sub index, the first-stage optimization model aiming at the optimal AGC performance is constructed. On this basis, in order to reduce the limit crossing and storage depth charging & discharging cases at the state of charge (SOC), the second-stage optimization model is constructed in order to minimize the SOC deviation. The simulation verification shows that the two-stage frequency regulation method proposed in this paper can improve the frequency regulation performance and benefits of the system of energy storage coordinated with thermal power unit, while reducing the energy storage in-depth charging & discharging cases and working life loss, thus improving the sustainability of frequency regulation auxiliary service of energy storage.

Key words: frequency regulation auxiliary service, energy storage, automatic generation control, improved analytic hierarchy process, two-stage frequency regulation

王益斌, 陈飞雄, 邵振国, 张抒凌, 张伟骏, 李智诚. 基于权重系数校正的火储两阶段联合调频方法[J]. 中国电力, 2024, 57(3): 83-94.

Yibin WANG, Feixiong CHEN, Zhenguo SHAO, Shuling ZHANG, Weijun ZHANG, Zhicheng LI. Two-stage Frequency Regulation Method for Energy Storage Coordinated with Thermal Power Unit Based on Weight Coefficient Correction[J]. Electric Power, 2024, 57(3): 83-94.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202303041

https://www.electricpower.com.cn/CN/Y2024/V57/I3/83

图/表 12

图 1 储能辅助火电参与调频结构示意

Fig.1 Schematic diagram of energy storage assisted thermal power in frequency regulation

图 2 典型AGC调频过程

Fig.2 Typical AGC frequency regulation process

图 3 火储联合两阶段调频优化流程

Fig.3 Two-stage frequency regulation optimization process for energy storage coordinated with thermal power unit

图 4 第一阶段调频优化结果

Fig.4 Results of frequency regulation optimization in the first stage

图 5 不同初始SOC的第二阶段调频优化结果

Fig.5 Results of frequency regulation optimization of different initial SOCs in the second stage

表 1 一阶段和两阶段优化方法调频效果对比

Table 1 Comparison of frequency regulation effect between the optimization methods of one and two stages

方法	平均综合指标K	SOC偏差	调频收益/万元
一	0.902	471.11	232.09
二	0.905	218.37	232.83

表 2 各调频子指标综合权重系数

Table 2 The comprehensive weight coefficient of each frequency regulation sub-index

δ₁		δ₂		δ₃
0.1702		0.1401		0.6897

表 3 权重系数校正前后调频性能和调频收益对比

Table 3 Performance and revenue comparison of frequency regulation under different weight setting methods

阶段	K₁	K₂	K₃	K	调频收益/万元
校正前	0.59	0.90	0.56	0.7587	195.73
校正后	0.59	0.83	1.25	0.9046	232.83

图 6 权重系数校正前后储能SOC偏差对比

Fig.6 Comparison of SOC deviation of energy storage before and after weight coefficient correction

表 4 不同控制策略下火储联合系统表现

Table 4 Performance of system of energy storage coordinated with thermal power unit under different control strategies

控制策略	调频性能综合指标	调频收益/万元	调频考核不合格次数
满补偿控制	0.6399	157.13	119
分时段控制	0.6314	162.95	2
两阶段调频	0.9046	232.83	0

图 7 不同控制策略下储能SOC情况

Fig.7 SOC of energy storage under different control strategies

表 5 不同控制策略下储能工作区域时间占比

Table 5 Time proportion of energy storage working area under different control strategies 单位：%

控制策略	SOC预警区工作时间占比	SOC可用区工作时间占比
满补偿控制	73.94	83.32
分时段控制	37.40	99.30
两阶段调频	5.20	100.00

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基于权重系数校正的火储两阶段联合调频方法

Two-stage Frequency Regulation Method for Energy Storage Coordinated with Thermal Power Unit Based on Weight Coefficient Correction

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基于权重系数校正的火储两阶段联合调频方法

Two-stage Frequency Regulation Method for Energy Storage Coordinated with Thermal Power Unit Based on Weight Coefficient Correction

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