Abstract This paper presents a novel method to online identify detuning components of the filter at the DC side in HVDC system. This method only needs to measure the current of each branch of the filter and analyzes the harmonic component, and then identifies the detuning component through calculating the change rates of several harmonic currents. The principle and the implementation of the proposed method are presented, and the theoretical formula is deduced about the relationship between the harmonic current change rate and the detuning ratio of different elements.. Thereafter, this paper proposes the criterions to identify the filter detuning, detuning components in series and in parallel of the filter, and the detuning degree. Simulation results of single-tuned and double-tuned filters show the correctness and effectiveness of the proposed method. This method can expand the original functions of the traditional filter with simple modification. It can realize the online identification of detuning components accurately and rapidly, and has good application prospect.
Huang Yinlong,Le Jian,Mao Tao等. The Online Parameters Identification of the DC-Side Filter of High-Voltage Direct Current System Based on Harmonic Current Change Ratio[J]. Transactions of China Electrotechnical Society, 2016, 31(6): 162-170.
[1] 杨勇. 高压直流输电技术发展与应用前景[J]. 电力自动化设备, 2001, 21(9): 58-60. Yang Yong. High voltage DC transmission technique and its future application[J]. Electric Power Auto- mation Equipment, 2001, 21(9): 58-60. [2] 梁旭明, 张平, 常勇. 高压直流输电技术现状及发展前景[J]. 电网技术, 2012, 36(4): 1-8. Liang Xuming, Zhang Ping, Chang Yong. Recent advances in high-voltage direct-current power trans- mission and its developing potential[J]. Power System Technology, 2012, 36(4): 1-8. [3] 李勇, 罗隆福, 贺达江, 等. 新型直流输电系统典型谐波分布特性分析[J]. 电力系统自动化, 2009, 33(10): 59-63. Li Yong, Luo Longfu, He Dajiang, et al. Analysis of harmonic distribution characteristics of a new DC transmission system[J]. Automation of Electric Power Systems, 2009, 33(10): 59-63. [4] 罗隆福, 李勇, 刘福生, 等. 基于新型换流变压器的直流输电系统滤波装置[J]. 电工技术学报, 2006, 21(12): 103-108. Luo Longfu, Li Yong, Liu Fusheng, et al. Design of HVDC filter device based on new-type converter transformer[J]. Transactions of China Electrotechnical Society, 2006, 21(12): 103-108. [5] 赫巍, 李兴源. 金小明, 等. 直流输电引起的谐波不稳定及其相关问题[J]. 电力系统自动化, 2006, 30(19): 94-99. He Wei, Li Xingyuan, Jin Xiaoming, et al. A survey if harmonic instability and related problem caused by HVDC[J]. Automation of Electric Power Systems, 2006, 30(19): 94-99. [6] 文俊, 郭锦燕, 刘洪涛, 等. 高压直流输电直流滤波系统综合优化设计[J]. 中国电机工程学报, 2007, 27(22): 14-19. Wen Jun, Guo Jinyan, Liu Hongtao, et al. Integrated optimizing design of filtering equipments at DC side of HVDC transmission system[J]. Proceedings of the CSEE, 2007, 27(22): 14-19. [7] 李季, 罗隆福, 许加柱, 等. 直流输电谐波不稳定抑制新方法[J]. 电力自动化设备, 2008, 28(2): 6-9. Li Ji, Luo Longfu, Xu Jiazhu, et al. Suppression of harmonic instability in HVDC[J]. Electric Power Automation Equipment, 2008, 28(2): 6-9. [8] 宋蕾, 文俊, 闫金春, 等. 高压直流输电系统直流滤波器的设计[J]. 高电压技术, 2008, 34(4): 647- 651. Song Lei, Wen Jun, Yan Jinchun, et al. Design of DC filters in HVDC transmission system[J]. High Voltage Engineering, 2008, 34(4): 647-651. [9] 同向前, 申明, 李牧. 单调谐滤波器的滤波器特性与短路比的关系[J]. 电力自动化设备, 2009, 29(9): 62-69. Tong Xiangqian, Shen Ming, Li Mu. Relation between short-circuit-ratio and single-tuned filter per- formance[J]. Electric Power Automation Equipment, 2009, 29(9): 62-69. [10] 魏春枝, 张小虎. 特高压直流滤波器的失谐检测及保护[J]. 技术与市场, 2013, 20(12): 112-114. Wei Chunzhi, Zhang Xiaohu. HVDC filter detuning detection and protection[J]. Technology and Market, 2013, 20(12): 112-114. [11] 王钢, 罗慧卉, 黄敏, 等. 基于粗糙集的三调谐直流滤波器失谐故障元件检测方法[J]. 电力系统自动化, 2011, 35(20): 81-87. Wang Gang, Luo Huihui, Huang Min, et al. A rough-set based detection method for detuning com- ponents in a triple-tuned DC filter[J]. Automation of Electric Power Systems, 2011, 35(20): 81-87. [12] 罗慧卉. 高压/特高压三调谐直流滤波器失谐故障元件检测方法研究[D]. 广州: 华南理工大学, 2011.
2016, Vol. 31 
