JP4430702B2 - 分散電源の単独運転検出装置 - Google Patents
分散電源の単独運転検出装置 Download PDFInfo
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- JP4430702B2 JP4430702B2 JP2007232269A JP2007232269A JP4430702B2 JP 4430702 B2 JP4430702 B2 JP 4430702B2 JP 2007232269 A JP2007232269 A JP 2007232269A JP 2007232269 A JP2007232269 A JP 2007232269A JP 4430702 B2 JP4430702 B2 JP 4430702B2
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- 238000001514 detection method Methods 0.000 claims description 119
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Description
Vm =jωL・Jm ∝jmL・Jm
更に、低次注入次数のアドミタンスまたはサセプタンスの判定と、高次注入次数のアドミタンスまたはサセプタンスの変化分の判定とのAND条件による判定を採用しているので、一つの上位系統から他の上位系統へ系統を切り替える系統切り替えの際の不要検出を防止することができる。
Ym1=Im1/Vm1
Ym2=Im2/Vm2
T4 =(t6 −t4 )+T3
≒20+30
≒50[m秒]
4 特高配電用変電所
10 配電線
14 分散電源保有設備
18 引込線
28 分散電源
30 単独運転検出装置
32 電流注入装置
34 単独運転監視装置
70〜73 離散フーリエ変換器
76、78 演算器
80、82 判定器
84 AND回路
90 変化分検出回路
m1 低次注入次数
m2 高次注入次数
Jm1、Jm2 注入電流
Bm1 サセプタンス
ΔBm2 サセプタンスの変化分
S4 単独運転検出信号
Claims (1)
- 上位系統に変電所を介して配電線が接続され、この配電線に、分散電源を有する分散電源保有設備が接続された構成の配電系統に適用されるものであって、
前記配電線から前記分散電源保有設備への引込線に、当該配電系統の基本波の1倍よりも大きい非整数倍の注入次数の注入電流を注入する電流注入装置と、
前記分散電源保有設備の受電点から眺めた前記配電系統の前記注入次数のアドミタンスまたはサセプタンスを計測して、当該アドミタンスまたはサセプタンスの変化から、前記分散電源が単独運転になったことを検出して単独運転検出信号を出力する単独運転監視装置とを備えている単独運転検出装置において、
(1)前記電流注入装置は、4次未満の低次注入次数の注入電流および4次以上の高次注入次数の注入電流を注入するものであり、
(2)前記単独運転監視装置は、
(a)前記低次注入次数の前記アドミタンスまたはサセプタンスを計測する低次側計測手段と、
(b)前記低次側計測手段で計測したアドミタンスまたはサセプタンスを所定の低次側判定値と比較することによって、前記分散電源が単独運転になったことを検出して低次側検出信号を出力する低次側判定手段と、
(c)前記高次注入次数の前記アドミタンスまたはサセプタンスを計測する高次側計測手段と、
(d)前記高次側計測手段で計測したアドミタンスまたはサセプタンスの、所定時間前からの変化分を検出する変化分検出手段と、
(e)前記変化分検出手段で検出したアドミタンスまたはサセプタンスの変化分を所定の高次側判定値と比較することによって、前記分散電源が単独運転になったことを検出して高次側検出信号を出力する高次側判定手段と、
(f)前記低次側判定手段からの出力および前記高次側判定手段からの出力の論理積を取り、前記低次側検出信号および高次側検出信号が共に出力されているときに前記単独運転検出信号を出力する論理積手段とを備えている、ことを特徴とする分散電源の単独運転検出装置。
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JP4430702B2 true JP4430702B2 (ja) | 2010-03-10 |
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Families Citing this family (2)
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JP6127824B2 (ja) * | 2013-08-07 | 2017-05-17 | 日新電機株式会社 | 太陽光発電用パワーコンディショナシステム |
JP6109050B2 (ja) * | 2013-12-02 | 2017-04-05 | 山洋電気株式会社 | 解列制御装置、解列制御方法およびパワーコンディショナー |
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