云南电网低频问题下风机转子动能控制研究

doi:10.12204/j.issn.1000-7229.2021.10.012

电力建设 ›› 2021, Vol. 42 ›› Issue (10): 110-118.doi: 10.12204/j.issn.1000-7229.2021.10.012

云南电网低频问题下风机转子动能控制研究

何廷一¹, 王晨光²(), 李胜男¹, 陈亦平³, 李崇涛², 高琴³

1.云南电网公司电力科学院,昆明市 650217
2.西安交通大学电气工程学院,西安市 710049
3.中国南方电网电力调度控制中心,广州市 510623

收稿日期:2021-03-31 出版日期:2021-10-01 发布日期:2021-10-09
通讯作者: 王晨光 E-mail:chenguang1996@stu.xjtu.edu.cn
作者简介:何廷一(1987),男,硕士,高级工程师,主要研究方向为系统分析机网协调。
李胜男(1971),女,硕士,高级工程师,主要研究方向为电力系统稳定分析与控制、继电保护等。
陈亦平(1978),男,博士,教授级高级工程师,主要研究方向为电力系统运行与控制。
李崇涛(1983),男,博士,副教授,主要研究方向为电力系统稳定分析与控制。
高琴(1992),女,硕士,工程师,主要研究方向为电力系统稳定分析与控制。
基金资助:
云南电网公司科技项目(YNKJXM20191240);国家自然科学基金面上项目(51977167)

Research on Rotor Kinetic Energy Control of Wind Turbines Under Low-Frequency Condition in Yunnan Power Grid

HE Tingyi¹, WANG Chenguang²(), LI Shengnan¹, CHEN Yiping³, LI Chongtao², GAO Qin³

1. Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650217, China
2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3. Dispaching and Control Center of China Sourthern Power Grid, Guangzhou 510623, China

Received:2021-03-31 Online:2021-10-01 Published:2021-10-09
Contact: WANG Chenguang E-mail:chenguang1996@stu.xjtu.edu.cn
Supported by:
Scientific and Technological Project of Yunnan Power Grid Co., Ltd.(YNKJXM20191240);National Natural Science Foundation of China(51977167)

摘要/Abstract

摘要：

风电机组提供频率响应后,转子转速恢复过程可能导致的频率二次跌落是制约风机提供向上调节能力的关键问题。文章对云南电网风机转子动能控制展开研究,提出风机转子动能控制参数整定方法,在扰动初期利用综合惯量控制快速抑制频率变化率,减小最大频率偏差;在扰动中后期与水火等常规同步机组和直流频率限制器(frequency limit controller,FLC)协调配合,避免频率二次跌落问题,实现频率整体动态过程的优化。仿真研究表明,增加虚拟惯性控制系数K_df,不利于改善频率最大偏差,会让频率在进入直流FLC死区后出现严重超调和反调现象;下垂控制系数K_pf是改善频率最大偏差和直流FLC动作量的关键,K_df和K_pf取值相同时,运行在最大功率追踪区的风电机组改善频率最大偏差的能力几乎相同。

关键词: 频率控制, 风机, 转子动能控制, 参数整定

Abstract:

Secondary frequency drop that may be caused by rotor speed recovery process is a key issue that restricts the ability of wind turbines to provide upward adjustment after wind turbines provide frequency response. In this paper, a study on kinetic energy control of wind turbines in Yunnan Power Grid is carried out, and a method for setting kinetic energy control parameters of wind turbines is proposed. In the early stage of disturbance, integrated inertia control is used to quickly suppress the rate of frequency change and reduce frequency deviation; in the middle and later stages of disturbance, it is coordinated with conventional synchronous units such as thermal and hydropower or frequency limit controller to avoid the problem of secondary frequency drop and realize the optimization of the overall frequency dynamic process. Simulation research shows that increasing the virtual inertia control coefficient K_df is not conducive to improving the maximum frequency deviation, and will cause serious overshoot and reverse modulation after the frequency enters the dead zone of FLC; the droop conrol coeffircent K_pf is the key to improve the maximum frequency deviation and reduce the amount of action about FLC; the wind turbines operating under the maximum power point tracking almost have the same ability to improve the maximum deviation of the frequency when their K_df and K_pf are same.

Key words: frequency control, wind turbine, rotor kinetic energy control, parameter setting

中图分类号:

TM61

何廷一, 王晨光, 李胜男, 陈亦平, 李崇涛, 高琴. 云南电网低频问题下风机转子动能控制研究[J]. 电力建设, 2021, 42(10): 110-118.

HE Tingyi, WANG Chenguang, LI Shengnan, CHEN Yiping, LI Chongtao, GAO Qin. Research on Rotor Kinetic Energy Control of Wind Turbines Under Low-Frequency Condition in Yunnan Power Grid[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(10): 110-118.

图/表 11

图1 系统频率仿真简化模型

Fig.1 Simplified model of system frequency simulation

图2 水电机组频率响应模型

Fig.2 Frequency response model of hydropower unit

图3 火电机组频率响应模型

Fig.3 Frequency response model of thermal power unit

图4 反向频差复归模型控制逻辑

Fig.4 The model of FLC reverting under inverse frequency deviation

图5 风机模型

Fig.5 Model of a wind turbine

图6 最大功率跟踪曲线

Fig.6 Curve of maximum power point tracking

图7 风机参数整定流程

Fig.7 Setting process of wind turbine parameters

图8 不同Kdf下Δfmax和|EDL|曲线

Fig.8 Δ f m a x and |EDL| curves under different Kdf

图9 v=9 m/s时不同Kdf下频率f、风电有功出力增量ΔPW和直流负荷出力增量绝对值|ΔPDL|曲线

Fig.9 f,Δ P W and |ΔPDL| curves under different Kdf at v=9 m/s

图10 不同Kpf下Δfmax和|EDL|曲线

Fig.10 Δ f m a x and |EDL| curves under different Kpf

图11 不同风速v、不同Kpf下频率f和风电有功出力量ΔPW曲线

Fig.11 f and Δ P W curves under different v and Kpf

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云南电网低频问题下风机转子动能控制研究

Research on Rotor Kinetic Energy Control of Wind Turbines Under Low-Frequency Condition in Yunnan Power Grid

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