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首页> 外文会议>Recent researches in instrumentation, measurement, circuits and systems >Phasor Measurement Unit and Power Conditioner Applied to Load Transferring to Reduce Current Magnitude During Feeder Parallel Operation Period
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Phasor Measurement Unit and Power Conditioner Applied to Load Transferring to Reduce Current Magnitude During Feeder Parallel Operation Period

机译：相量测量单元和功率调节器用于负载转移，以降低馈线并联运行期间的电流幅度

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摘要

The requirement of high quality electric power supply from utility is a common practice today. Thus, no matter in planning, designing, or system dispatching, it is desired to give un-interrupted electric power to customers. However, when the loading of a distribution system power feeder is too high or the feeder needs to be maintained, the feeder load should be transferred to other feeder. There are two types of feeder load transferring, interrupted and un-interrupted. The un-interrupted type means that the electric power supplied to customers will not be interrupted during feeder load transferring. However, there are several factors to affect the feeder current magnitude during load transferring, such as transformer impedances, primary side power level, and original loading of the feeder. If the current is too high, the feeder protection system will trip the feeder breakers to shut down the power supply system. A novel approach is presented to reduce the feeder current magnitude during load transferring. The phasor measurement units (PMU) will be used to obtain the synchronous voltage magnitude and phase angle of the transformers, of which feeders are transferred. A power conditioner is installed in the secondary side of the transformer. Then the phase angle values from the PMUs will be sent to the power conditioner and the suitable phase shifting will be used to reduce the phase angle difference between the two transformers. The simulation results show the feeder current magnitude will be greatly reduced during load transferring. The power supply reliability is raised.
机译：当今，来自公用事业的高质量电力供应的需求是普遍的做法。因此，无论在计划，设计或系统调度中，都希望为客户提供不间断的电力。但是，当配电系统功率馈线的负载过高或需要维护馈线时，馈线负载应转移到其他馈线。馈线负载传输有两种类型：中断的和不中断的。不间断型意味着在馈电线负载转移期间不会中断提供给客户的电源。但是，有几个因素会影响负载转移期间的馈线电流幅度，例如变压器阻抗，初级侧功率水平和馈线的原始负载。如果电流过高，则馈线保护系统将使馈线断路器跳闸，以关闭电源系统。提出了一种新颖的方法来减少负载转移期间的馈线电流幅度。相量测量单元（PMU）将用于获得变压器的同步电压幅值和相角，并在其中转移馈线。功率调节器安装在变压器的次级侧。然后，将来自PMU的相角值发送到功率调节器，并使用适当的相移来减小两个变压器之间的相角差。仿真结果表明，在负载转移过程中，馈线电流幅度将大大降低。电源可靠性得到提高。

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