EXPERIMENTAL STUDIES ON SUPPRESSION OF FREQUENCY AND VOLTAGE DEVIATION OF WIND/DIESEL POWER GENERATION SYSTEM BY MEANS OF SUPERCONDUCTING MAGNETIC ENERGY STORAGE

我们对风力/柴油混合发电系统的超导储能稳频稳压进行了两年的实验研究，以期对模拟结果进行实验验证，明确整个系统在实际应用中需要解决的问题。所得结果如下：1.研究结果。构建了风力/柴油混合发电系统的模拟实验系统。感应发电机(风力发电机)由模拟风力涡轮机的感应电机驱动，同步发电机(柴油发电机)由模拟柴油发动机的直流电机驱动。这两台发电机通过一条人造传输线相互连接。感应电机通过逆变器供电，直流电机通过变流器供电。测量了系统的静态特性，其中…的输出功率在负载功率一定的情况下，较多的感应发电机增长缓慢。验证了感应发电机输出功率变化引起的频率偏差对同步发电机调速器的激励作用，降低了同步发电机的出力。SMES(最大线圈电流：50A，储能容量：50kJ)连接到感应发电机端部，其功率由感应发电机的角速度偏差控制。通过SMES的功率控制，可以减小感应发电机输出阶跃变化引起的系统频率变化的超调和欠调量，在感应发电机输出为正弦变化的情况下，SMES对高频变化的影响尤为突出，因为调速器的响应速度比SMES慢。SMES对系统频偏的抑制效果不是很好，需要改进控制方法。此外，还需要增加无功控制。较少

We have for two years done experimental investigation on the frequency and voltage stabilization by superconducting magnetic energy storage (SMES) for the wind/diesel hybrid power generation system, in order to experimentally verify the results of the simulation we have done before, and to clarify the problems of the total system to be solved toward the practical use. The obtained results are follows.1. The simulated experimental system of a wind/diesel hybrid generation system was composed. The induction generator (wind power generator) is driven by an induction motor which simulates the wind turbine, and the synchronous generator (diesel generator) is driven by a dc motor which simulates the diesel engine. The two generators are interconnected through an artificial transmission line. The induction motor is fed with electric power through an inverter, and the dc motor is fed through a convertor.2. The static characteristics of the system were measured, where the output power from the … More induction generator was increased slowly with the load power fixed. As the results, it was verified that the governor of the synchronous generator was actuated by the frequency deviation caused by the output power variation of the induction generator, and the output from the synchronous generator was decresed.3. The SMES (maximum coil current : 50A,energy storage capacity : 50kJ) was connected to the induction generator terminal, and the power of the SMES was controlled by the angular velocity deviation of the induction generator. The overshoot and undershoot of the system frequency variation due to stepwise changes of the output of the induction generator could be decreased by means of the power control of the SMES.In case of sinusoidal changes of the induction generator output, the effect of the SMES was outstanding for the changes of high frequency, because the response of the governor is rather slow compared with the SMES.4. The suppression of the system frequency deviation by SMES was not so effective considering the amount of the controllable power by SMES.Hence, it was found needed to improve the control method. Also, the addition of the reactive power control is required. Less