In order to improve the voltage quality of rural power distribution network, the series capacitor in distribution lines is proposed. The principle of series capacitor compensation technology to improve the quality of ...In order to improve the voltage quality of rural power distribution network, the series capacitor in distribution lines is proposed. The principle of series capacitor compensation technology to improve the quality of rural power distribution lines voltage is analyzed. The real rural power distribution network simulation model is established by Power System Power System Analysis Software Package (PSASP). Simulation analysis the effect of series capacitor compensation technology to improve the voltage quality of rural power distribution network, The simulation results show that the series capacitor compensation can effectively improve the voltage quality and reduce network losses and improve the transmission capacity of rural power distribution network.展开更多
An accurate fault location algorithm for double-circuit series compensated lines is presented.Use of two-end unsynchronized measurements of current and voltage signals is considered.The algorithm applies two subroutin...An accurate fault location algorithm for double-circuit series compensated lines is presented.Use of two-end unsynchronized measurements of current and voltage signals is considered.The algorithm applies two subroutines,designated for locating faults on particular line sections,and additionally the procedure for selecting the valid subroutine.The subroutines are formulated with use of the generalized fault loop model and the distributed parameter line model is applied.Performed ATP-EMTP based evaluation has shown the validity of the derived fault location algorithm and its high accuracy.展开更多
In this paper,an introduction to the bifurcation theory and its applicability to the study of sub-synchronous resonance (SSR) phenomenon in power system are presented. The continuation and bifurcation analysis softwar...In this paper,an introduction to the bifurcation theory and its applicability to the study of sub-synchronous resonance (SSR) phenomenon in power system are presented. The continuation and bifurcation analysis software AUTO97 is adopted to investigate SSR for a single-machine-infinite-bus power system with series capacitor compensation. The investigation results show that SSR is the result of unstable limit cycle after bifurcation. When the system exhibits SSR, some complex periodical orbit bifurcations, such as torus bifurcation and periodical fold bifurcation, may happen with the variation of limit cycle. Furthermore, the initial operation condition may greatly influence the ultimate state of the system. The time-domain simulation is carried out to verify the effectiveness of the results obtained from the bifurcation analysis.展开更多
提出一种可用于直流电容取能式串联电能质量调节器(series power quality regulator,SPQR)的阶段式补偿控制策略。该补偿策略分为稳定运行、超限运行及恢复运行3个阶段,提出针对各阶段分别采用完全补偿、最小能量补偿及最大能量补偿策...提出一种可用于直流电容取能式串联电能质量调节器(series power quality regulator,SPQR)的阶段式补偿控制策略。该补偿策略分为稳定运行、超限运行及恢复运行3个阶段,提出针对各阶段分别采用完全补偿、最小能量补偿及最大能量补偿策略。采用负荷电压及滤波电容电流双闭环控制策略对各阶段进行控制,并对稳定运行阶段增加了直流电容电压调整控制。为保证各阶段切换时的稳定,提出综合利用直流电容电压及系统电压幅值作为判据的切换控制策略。利用EMTDC/PSCAD对所提出的补偿控制策略进行仿真验证,仿真结果表明5:阶段式补偿控制策略能够补偿系统的稳态及暂态电压扰动,并能够保证装置的持续在线运行。展开更多
文摘In order to improve the voltage quality of rural power distribution network, the series capacitor in distribution lines is proposed. The principle of series capacitor compensation technology to improve the quality of rural power distribution lines voltage is analyzed. The real rural power distribution network simulation model is established by Power System Power System Analysis Software Package (PSASP). Simulation analysis the effect of series capacitor compensation technology to improve the voltage quality of rural power distribution network, The simulation results show that the series capacitor compensation can effectively improve the voltage quality and reduce network losses and improve the transmission capacity of rural power distribution network.
文摘An accurate fault location algorithm for double-circuit series compensated lines is presented.Use of two-end unsynchronized measurements of current and voltage signals is considered.The algorithm applies two subroutines,designated for locating faults on particular line sections,and additionally the procedure for selecting the valid subroutine.The subroutines are formulated with use of the generalized fault loop model and the distributed parameter line model is applied.Performed ATP-EMTP based evaluation has shown the validity of the derived fault location algorithm and its high accuracy.
基金Supported by the National Basic Research Program of China ("973" Projects) (Grant Nos.1998020319 and 2004CB217906)
文摘In this paper,an introduction to the bifurcation theory and its applicability to the study of sub-synchronous resonance (SSR) phenomenon in power system are presented. The continuation and bifurcation analysis software AUTO97 is adopted to investigate SSR for a single-machine-infinite-bus power system with series capacitor compensation. The investigation results show that SSR is the result of unstable limit cycle after bifurcation. When the system exhibits SSR, some complex periodical orbit bifurcations, such as torus bifurcation and periodical fold bifurcation, may happen with the variation of limit cycle. Furthermore, the initial operation condition may greatly influence the ultimate state of the system. The time-domain simulation is carried out to verify the effectiveness of the results obtained from the bifurcation analysis.
文摘提出一种可用于直流电容取能式串联电能质量调节器(series power quality regulator,SPQR)的阶段式补偿控制策略。该补偿策略分为稳定运行、超限运行及恢复运行3个阶段,提出针对各阶段分别采用完全补偿、最小能量补偿及最大能量补偿策略。采用负荷电压及滤波电容电流双闭环控制策略对各阶段进行控制,并对稳定运行阶段增加了直流电容电压调整控制。为保证各阶段切换时的稳定,提出综合利用直流电容电压及系统电压幅值作为判据的切换控制策略。利用EMTDC/PSCAD对所提出的补偿控制策略进行仿真验证,仿真结果表明5:阶段式补偿控制策略能够补偿系统的稳态及暂态电压扰动,并能够保证装置的持续在线运行。
