为解决在电网换相换流器型直流输电LCC-HVDC(line commuted converter based high voltage direct cur⁃rent)受端经历大扰动时传统PI控制下的静止同步补偿器STATCOM(static synchronous compensator)加剧受端电压崩溃的问题,提出一种PI...为解决在电网换相换流器型直流输电LCC-HVDC(line commuted converter based high voltage direct cur⁃rent)受端经历大扰动时传统PI控制下的静止同步补偿器STATCOM(static synchronous compensator)加剧受端电压崩溃的问题,提出一种PI与滑模切换控制策略。在小扰动下PI控制的STATCOM通过混合无功灵敏度因子HRPSF(hybrid reactive power sensitivity factor)精确计算无功补偿,在大扰动下STATCOM控制系统切换到滑模控制,通过Lyapunov函数证明滑模控制系统最终会达到稳定。在MATLAB/Simulink平台上将所提出的控制策略应用于LCC-HVDC受端换流站的STATCOM中进行仿真分析,结果验证了其合理性与有效性。展开更多
This article presents a comprehensive review for the dilemma of reactive power flow, while addressing different proposed remedy strategies: conventional and most update solutions. Robust analytical expressions were ut...This article presents a comprehensive review for the dilemma of reactive power flow, while addressing different proposed remedy strategies: conventional and most update solutions. Robust analytical expressions were utilized to exploit the functionality of the proposed solutions and to show clearly the relation between the reactive power and control variables. The article, moreover, proposes a simple, innovative and robust analysis for static performance of the STATCOM. This approach shows clearly the advantages of the STA-TCOM in regulating reactive power and maintaining load voltage level within presumable limits. The approach, furthermore, reveals explicitly via analytical expressions the impact of the STATCOM operation on different aspects of the power system under concern.展开更多
文摘为解决在电网换相换流器型直流输电LCC-HVDC(line commuted converter based high voltage direct cur⁃rent)受端经历大扰动时传统PI控制下的静止同步补偿器STATCOM(static synchronous compensator)加剧受端电压崩溃的问题,提出一种PI与滑模切换控制策略。在小扰动下PI控制的STATCOM通过混合无功灵敏度因子HRPSF(hybrid reactive power sensitivity factor)精确计算无功补偿,在大扰动下STATCOM控制系统切换到滑模控制,通过Lyapunov函数证明滑模控制系统最终会达到稳定。在MATLAB/Simulink平台上将所提出的控制策略应用于LCC-HVDC受端换流站的STATCOM中进行仿真分析,结果验证了其合理性与有效性。
文摘This article presents a comprehensive review for the dilemma of reactive power flow, while addressing different proposed remedy strategies: conventional and most update solutions. Robust analytical expressions were utilized to exploit the functionality of the proposed solutions and to show clearly the relation between the reactive power and control variables. The article, moreover, proposes a simple, innovative and robust analysis for static performance of the STATCOM. This approach shows clearly the advantages of the STA-TCOM in regulating reactive power and maintaining load voltage level within presumable limits. The approach, furthermore, reveals explicitly via analytical expressions the impact of the STATCOM operation on different aspects of the power system under concern.