極低温大容量送電線の事故脱落時における大都市送電系統の電力動揺解析

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  • Power Swing Analysis in a Future Metropolitan Electric Power System on a Contingent Trip of Cryogenic High Power Cables
  • キョクテイオン ダイヨウリョウ ソウデンセン ノ ジコ ダツラクジ ニ オケル
  • Power swing analysis in a future metropolitan electric power system on a contingent trip of cryogenic high‐power cables

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説明

A cryogenic power cable is expected to be capable of carrying bulk power as a main transmission Sine in a future metropolitan electric power system. It is important to establish a strategy how to sustain power supply when such a highly densified power supply route trips from the network due to contingency.<br> Our proposal here is that the bulk power transmitted by the cryogenic cable could be distributed into the parallel conventional transmission lines by suitable circuit breaker operations in the system. In this process, however, power flow routes are forced to be changed with a remarkable modification in the system configuration.<br> In this paper, the power swings associated with the large power flow change following contingent faults are analyzed by means of a transient network analyzer. It is found out that the proposed system modification could be realized without any harmful power swing if the parameters in generators as well as in control devices have conventional magnitudes. It is also shown by simulations that margin to occurrence in unstable power swing is left enough even if the parameters rather deviate from the present magnitudes.

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