混合型统一潮流控制器抑制风电次同步振荡控制策略

doi:10.12204/j.issn.1000-7229.2021.09.006

电力建设 ›› 2021, Vol. 42 ›› Issue (9): 53-64.doi: 10.12204/j.issn.1000-7229.2021.09.006

• 高比例新能源交直流电网特性分析与运行控制·栏目主持辛业春教授、姜涛教授、吴学光教授、宋晓博士· • 上一篇下一篇

混合型统一潮流控制器抑制风电次同步振荡控制策略

高本锋¹, 王晓¹, 梁纪峰², 赵书强¹

1.河北省分布式储能与微网重点实验室(华北电力大学),河北省保定市 071003
2.国网河北省电力有限公司电力科学研究院,石家庄市 050021

收稿日期:2021-01-22 出版日期:2021-09-01 发布日期:2021-09-02
通讯作者: 王晓
作者简介:高本锋(1981),男,博士,副教授,主要研究方向为高压直流输电和电力系统次同步振荡|梁纪峰(1985),男,硕士,高级工程师,主要研究方向为新能源电力系统分析与控制、电能质量分析与控制|赵书强(1964),男,博士,教授,主要研究方向为新能源电力系统、电力系统规划与可靠性。
基金资助:
国家自然科学基金项目(51507064)

Control Strategy of Hybrid Unified Power Flow Controller to Suppress Wind Power Sub-synchronous Oscillation

GAO Benfeng¹, WANG Xiao¹, LIANG Jifeng², ZHAO Shuqiang¹

1. Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province, North China Electric Power University, Baoding 071003, Hebei Province, China
2. State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China

Received:2021-01-22 Online:2021-09-01 Published:2021-09-02
Contact: WANG Xiao
Supported by:
National Natural Science Foundation of China(51507064)

摘要/Abstract

摘要：

混合型统一潮流控制器(hybrid unified power flow controller,HUPFC)可以实现统一潮流控制器(unified power flow controller,UPFC)与移相变压器(‘Sen’ transformer,ST)的优势互补,广泛应用于系统潮流控制之中。但是,尚未有文献开展HUPFC抑制系统次同步振荡(sub-synchronous oscillation,SSO)的研究。针对双馈风机(double-fed induction generator,DFIG)经串补输电系统存在的SSO问题,提出一种HUPFC附加有源电阻控制(supplementary active resistance control,SARC)策略。首先,阐述了HUPFC的原理及其SSO抑制机理。然后,设计了SARC策略,该策略通过实时跟踪线路中的次同步电流信号,使HUPFC向输电线路叠加一个与次同步电流信号相位相同、幅值可变的次同步电压,进而实现系统等效正电阻,达到抑制SSO的目的。最后,给出了SARC的参数设计方法,在PSCAD/EMTDC仿真环境中,以华北某风电场为仿真算例,采用频率扫描与时域仿真相结合的方法,验证了所提HUPFC的SARC策略抑制双馈风机经串补输电系统SSO的有效性。

关键词: 混合型统一潮流控制器(HUPFC), 次同步振荡(SSO), 双馈风电场, 串补线路, 附加有源电阻控制(SARC)

Abstract:

The hybrid unified power flow controller (HUPFC) combines the advantages of unified power flow controller (UPFC) and ‘Sen’ transformer (ST), so HUPFC is widely applied in power flow control of the power system. However, little literature has studied the application of HUPFC to suppress sub-synchronous oscillation (SSO). To solve the problem of SSO in double-fed induction generator (DFIG) based wind farm connected to series compensated transmission system, a suppression strategy is proposed in the paper on the basis of the supplementary active resistance control (SARC) of HUPFC. Firstly, the principle of HUPFC and the suppression mechanism for SSO are introduced. Then, the SARC strategy is designed. By tracking sub-synchronous current in the transmission line, the SARC strategy makes HUPFC inject a sub-synchronous voltage which has the same phase as the sub-synchronous current and variable amplitude to the grid. Thereby, the system equivalent resistance is increased to a positive value to suppress SSO. Finally, the parameters design method of SARC is introduced and a detailed simulation model is carried out in PSCAD/EMTDC using the data of an actual wind farm in North China. The results of the frequency scanning and the time domain simulation both show that the proposed SARC strategy of HUPFC can effectively suppress SSO in DFIG-based wind farm connected to series compensated transmission system.

Key words: hybrid unified power flow controller (HUPFC), sub-synchronous oscillation (SSO), doubly-fed wind farms, serious complement transmission, supplementary active resistance control (SARC)

中图分类号:

TM712

高本锋, 王晓, 梁纪峰, 赵书强. 混合型统一潮流控制器抑制风电次同步振荡控制策略[J]. 电力建设, 2021, 42(9): 53-64.

GAO Benfeng, WANG Xiao, LIANG Jifeng, ZHAO Shuqiang. Control Strategy of Hybrid Unified Power Flow Controller to Suppress Wind Power Sub-synchronous Oscillation[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(9): 53-64.

图/表 20

图1 UPFC结构

Fig.1 Structure of UPFC

图2 ST结构

Fig.2 Structure of a ST

图3 两级调节时HUPFC补偿电压向量

Fig.3 Compensation voltage vector of HUPFC when the number of taps is two

图4 某风电场输出功率曲线

Fig.4 Output power curve of a wind farm

图5 某风电场输出有功功率

Fig.5 Active power output of a wind farm

图6 双馈经串补输电系统SSO发生机理

Fig.6 Schematic diagram of SSO generation mechanism of DFIG-based wind farm connected to series compensated transmission system

图7 双馈风电场经串补输电系统等效电路

Fig.7 Equivalent circuit of DFIG-based wind farm connected to series compensated transmission system

图8 双馈风电场经串补输电系统简化等效电路

Fig.8 Simplified equivalent circuit of DFIG-based wind farm connected to series compensated transmission system

图9 HUPFC抑制SSO的原理

Fig.9 The principle of HUPFC to suppress SSO

图10 加入SARC后的HUPFC整体控制策略

Fig.10 Overall control strategy of HUPFC with SARC

图11 含HUPFC的双馈风电场经串补输电系统

Fig.11 DFIG-based wind farm connected to series compensated transmission system with HUPFC

表A1 HUPFC参数

Table A1 Parameters of HUPFC

表A2 双馈风电机组及系统等值参数

Table A2 Equivalent parameters of DFIG and system

图12 补偿前后Bode图对比

Fig.12 Comparison of Bode diagrams before and after compensation

图13 不同线路负载度下,有、无SARC时系统等效阻抗

Fig.13 Equivalent impedance of the system with or without SARC under different line load

图14 线路负载度不同,有、无SARC时线路有功功率

Fig.14 Active power with or without SARC under different line load

图15 不同串补度下,有、无SARC投入时线路有功功率

Fig.15 Line active power with or without SARC under different series compensated levels

图16 不同容量配比下,有、无SARC时系统等效阻抗

Fig.16 System equivalent impedance with or without SARC under different capacity ratios

图17 不同容量配比下,有、无SARC时线路有功功率

Fig.17 Active power with or without SARC under different capacity ratios

图18 不同故障类型下,有、无SARC时线路有功功率

Fig.18 Active power with or without SARC under different fault types

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混合型统一潮流控制器抑制风电次同步振荡控制策略

Control Strategy of Hybrid Unified Power Flow Controller to Suppress Wind Power Sub-synchronous Oscillation

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