The synthetic making test has been widely used in evaluating the break ability of high-voltage circuit breaker. However, the test research and application are still inadequate, especially in the condition of rated vol...The synthetic making test has been widely used in evaluating the break ability of high-voltage circuit breaker. However, the test research and application are still inadequate, especially in the condition of rated voltage. According to the realistic conditions of test stations in China, a control device based on pre-arcing current detection and phase control is proposed in this paper. A sample of the control device made up of DSP TMS320LF2407A is fabricated, in which the CPLD MAX7064 is used to transmit signals for EMC design. It can be applied in full voltage synthetic making test at a level of 126kV/63kA. The test results show that, it is accurate to control the making phase of the applied voltage, whether the closing is demanded at voltage peak or zero.展开更多
The vector control algorithm based on vector space decomposition(VSD) transformation method has a more flexible control freedom, which can control the fundamental and harmonic subspace separately. To this end, a curre...The vector control algorithm based on vector space decomposition(VSD) transformation method has a more flexible control freedom, which can control the fundamental and harmonic subspace separately. To this end, a current vector decoupling control algorithm for six-phase permanent magnet synchronous motor(PMSM) is designed. Using the proposed synchronous rotating coordinate transformation matrix, the fundamental and harmonic components in d-q subspace are changed into direct current(DC) component, only using the traditional proportional integral(PI) controller can meet the non-static difference adjustment, and the controller parameter design method is given by employing internal model principle. In addition, in order to remove the 5th and 7th harmonic components of stator current, the current PI controller parallel with resonant controller is employed in x-y subspace to realize the specific harmonic component compensation. Simulation results verify the effectiveness of current decoupling vector controller.展开更多
It is well accepted that lower hybrid current drive （LHCD） is the most efficient method for non-inductive current drive in fusion devices and the effect of the current drive is dependent on not only microwave power ...It is well accepted that lower hybrid current drive （LHCD） is the most efficient method for non-inductive current drive in fusion devices and the effect of the current drive is dependent on not only microwave power but also its grill phase shift. This paper presents a new kind of feedback control system for antenna phase difference in LHCD experiments. In this highspeed control system, a lot of new technologies and methods are incorporated. The results of the experiments show a very good agreement with the system design.展开更多
有源电力滤波器(active power filter,APF)的谐波电流控制直接影响着APF的滤波效果。针对指数趋近率容易产生抖振的问题,提出了一种变指数趋近率,并在dq坐标系下推导出了基于该变指数趋近率的APF滑模控制律。为提高APF对高次谐波的追踪...有源电力滤波器(active power filter,APF)的谐波电流控制直接影响着APF的滤波效果。针对指数趋近率容易产生抖振的问题,提出了一种变指数趋近率,并在dq坐标系下推导出了基于该变指数趋近率的APF滑模控制律。为提高APF对高次谐波的追踪能力,将重复控制和基于变指数趋近率的滑模控制并联,提出了一种APF的重复滑模控方法。仿真结果表明,相对于基于指数趋近率的滑模控制方法,提出的重复滑模控制方法具有更高的稳态精度,电网电流的谐波畸变率更低。展开更多
文摘The synthetic making test has been widely used in evaluating the break ability of high-voltage circuit breaker. However, the test research and application are still inadequate, especially in the condition of rated voltage. According to the realistic conditions of test stations in China, a control device based on pre-arcing current detection and phase control is proposed in this paper. A sample of the control device made up of DSP TMS320LF2407A is fabricated, in which the CPLD MAX7064 is used to transmit signals for EMC design. It can be applied in full voltage synthetic making test at a level of 126kV/63kA. The test results show that, it is accurate to control the making phase of the applied voltage, whether the closing is demanded at voltage peak or zero.
基金Project(51507188)supported by the National Natural Science Foundation of China
文摘The vector control algorithm based on vector space decomposition(VSD) transformation method has a more flexible control freedom, which can control the fundamental and harmonic subspace separately. To this end, a current vector decoupling control algorithm for six-phase permanent magnet synchronous motor(PMSM) is designed. Using the proposed synchronous rotating coordinate transformation matrix, the fundamental and harmonic components in d-q subspace are changed into direct current(DC) component, only using the traditional proportional integral(PI) controller can meet the non-static difference adjustment, and the controller parameter design method is given by employing internal model principle. In addition, in order to remove the 5th and 7th harmonic components of stator current, the current PI controller parallel with resonant controller is employed in x-y subspace to realize the specific harmonic component compensation. Simulation results verify the effectiveness of current decoupling vector controller.
基金Meg-science Engineering Project of the Chinese Academy of Sciences
文摘It is well accepted that lower hybrid current drive （LHCD） is the most efficient method for non-inductive current drive in fusion devices and the effect of the current drive is dependent on not only microwave power but also its grill phase shift. This paper presents a new kind of feedback control system for antenna phase difference in LHCD experiments. In this highspeed control system, a lot of new technologies and methods are incorporated. The results of the experiments show a very good agreement with the system design.
文摘有源电力滤波器(active power filter,APF)的谐波电流控制直接影响着APF的滤波效果。针对指数趋近率容易产生抖振的问题,提出了一种变指数趋近率,并在dq坐标系下推导出了基于该变指数趋近率的APF滑模控制律。为提高APF对高次谐波的追踪能力,将重复控制和基于变指数趋近率的滑模控制并联,提出了一种APF的重复滑模控方法。仿真结果表明,相对于基于指数趋近率的滑模控制方法,提出的重复滑模控制方法具有更高的稳态精度,电网电流的谐波畸变率更低。
