Studies on Integrated Control Strategy for Power Systems by Distributed Allocation of Micro SMES Units

超导磁储能系统能够独立控制有功功率和无功功率，且充放电寿命长，有望在电力系统稳定和电能质量改善方面得到应用。最近，为了解决电压控制问题，人们研究了多个小型SMES单元(微型SMES)的分布式分配问题。如果将这些分散的微型SMES单元通过通信网络连接起来，并进行协调控制，则有可能提高它们的控制效果。从这一角度出发，研究了最优配置的确定方法和抑制发电机摆动的最优控制策略。研究了禁忌搜索算法在SMES控制系统中的最优分配和最优控制问题，并比较了SMES控制系统仅采用本地信号作为输入和远程信号也采用…的控制效果1.建立了同时确定SMES最优配置和最优控制增益的方法，并验证了其有效性。2.明确了安装微型SMES装置可以抑制相角第一摆的峰值，提高第一摆后振荡的阻尼。3.发现以相角偏差作为性能指标进行优化，以遥测信号作为SMES控制系统的输入信号，可以减小相角偏差，将角速度乘以β加入到具有相角偏差的性能指标中，在仅用于SMES控制的局部信号的情况下，相角偏差随β值的增大而增大。结果表明，在加入遥信的情况下，随着β的增大，一次摆动后的相角振荡的阻尼值增大。但是，当β的取值过大时，相角收敛的时间会增加。5.如果在适当的β取值下进行优化，添加远程信号的控制效果要好于仅使用本地信号的控制效果。较少

Since SMES(Superconducting Magnetic Energy Storage) can control both active power and reactive power independently, and has long lifetime of charge and discharge, it is expected its application to power system stabilization and power quality improvement. Recently, the distributed allocation of a number of small SMES units (micro-SMES) is examined for solving the voltage control problem. If these distributed micro SMES units are connected through communication network, and controlled coordinately, their control effect can possibly be increased. From the above mentioned point of view, the determining method of optimal allocation and optimal control strategy for the suppression of generator swings were investigated in this study. Tabu search algorithm was examined for the optimal allocation and optimal control, and also, the comparison of control effect was done between the cases where just the local signals are used as the input for SMES control system and the remote signals are also use … More d. The main results are as follows.1.Established was the determining method of both the optimal SMES allocation and the optimal control gains simultaneously, and its validity was ascertained.2.It was made clear that the peak value of the phase angle first swing can be suppressed, and the damping of the oscillation after the first swing can be improved by installing micro SMES units.3.It was found that, when the phase angle deviation was used as the performance index for optimization, and the remote signals were used as the input signal for the SMES control system, the deviation of phase angle was reduced, but the oscillation with short period was observed after the first swing.4.When the angular velocity multiplied by β was added to the performance index with the phase angle deviation, the phase angle deviation was increased with the increase of the value of β in case of just the local signal used for the SMES control. It was found that, in case of the remote signals added, the damping of phase angle oscillation after the first swing is improved with the increase of β. With the too large value of β, however, the time for the phase angle convergence was increased.5.If the optimization was done with a adequate value of β, the control with remote signals added gave better performance than with just the local signal. Less