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Development of a 20-MVA STATCOM for Flicker Suppression |
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AUTHORS |
| Tetsuya Kato |
Power Electronics Design Dept., Electrical Control Systems Div., Information & Telecommunication Systems, Hitachi, Ltd. |
| Tomomichi Ito |
Power Electronics Systems, Advanced Inverter System R&D Center, Hitachi Research Lab., Hitachi, Ltd. |
| Takashi Aihara |
Power Transportation System Engineering Dept., Electrical Control Systems Div., Information & Telecommunication Systems, Hitachi, Ltd. |
| Satoru Namatame |
Power Electrical Equipment Plant Control Dept., Equipment Systems Div., Hitachi Information & Control Solutions, Ltd. |
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OVERVIEW |
Power system-connected trials of a 20-MVA STATCOM with self-commuted conversion have been completed at Hokuriku Electric Power Company' s Fushiki Substation, and the system has now been put into service. In addition to reactive power compensation, the STATCOM provides flicker suppression capability that is now in great demand, features a novel new control scheme developed by Hitachi, and easily satisfies its prescribed performance criteria. Hokuriku Electric' s Fushiki Substation supplies power to an industrial customer that operates electric arc furnaces that, because of the rapidly varying and largely unbalanced nature of the furnace load, were major source of system flicker. The STATCOM provides complete reactive power compensation, and is thus able to mitigate the adverse effects of flicker on the lines of other utility customers. With the objective of developing a STATCOM that is highly effective at mitigating flicker based on a relatively modest output 20-MVA converter as opposed to a 60-MVA system, we have now verified that the system easily satisfies the prescribed flicker suppression performance criteria, and the system has now been put into actual service.
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TO READ THIS ARTICLE |
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RELEVANT SITE |
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KEYWORDS |
STATCOM, SVC, flicker, IGBT, PWM
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