Daiichi Electronics ASY-96 - Setting Example

ASY‑206‑077
16
7.6Settingexample
7.6.1Settingitem
①Voltagedifference(△V)
②Frequencydifference(△F)
③Voltageadjustmentpulsewidth(Vpw)
④Voltageadjustmentpulseperiod(Vpint)
⑤Governorpulsewidth(Fpw)
⑥Circuitbreakeradvancetime(25T)
Settingitem Default Settingexample
Voltagedifference(△V) 5％ 2％
Frequencydifference(△F) 0.1Hz 0.1Hz
Voltageadjustmentpulsewidth(Vpw) 0.5s 0.5s
Voltageadjustmentpulseperiod(Vpint) 2s 5s
Governorpulsewidth(Fpw) 0.5s 0.5s
Circuitbreakeradvancetime(25T) 50ms Range10〜310ms
7.6.2Judgmentofsettingpoint
★①Voltagedifference(AssumedΔV=2％atbusvoltage6600V)
Controlwithin±2％＝±132V(6468to6732V)againstbusvoltage6600V.
★②Voltageadjustmentpulsewidth,pulseperiod(AssumedVpw＝0.5s,Vpint＝5s)
Voltagecontrolresolution(voltagechangeperpulse)willbe200V×0.5s/6s＝16.7V/pulse,when
advancetimeis6s/200V.Thechangeis16.7Vforevery5s,becauseofthepulseperiodbeing5s.
★③Frequencydifference(Assumed△F＝0.1Hz.)
Controlwithin0.1Hz＝50Hz±0.1Hzagainstbusfrequency50Hz.
★④Governorpulsewidth(AssumedFpw＝0.5s.)
Frequencycontrolresolution(frequencychangeperpulse)willbe1Hz×0.5/15s＝0.033Hz/pulse.
Thechangeis0.033Hzforevery1/ΔF(s)becauseofthepulseperiodbeing1/ΔF.
★⑤Circuitbreakeradvancetime(25T)
10〜310msat△F＝0.1Hz
10〜150msat△F＝0.2HzThisisthesettingrange.
10〜80msat△F＝0.3Hz
7.6.3Countermeasureincaseofunstablecontrolcondition.
1)Whenvoltagecontrolbecomeshunting.
①Increasevoltagedifference(△V).
②Decreasevoltageadjustmentpulsewidth(Vpw).
③Increasevoltageadjustmentpulseperiod(Vpint).
Changecanbedonebyoneoftheabovemeasuresortheircombinedmeasures.
2)Whenfrequencycontrolbecomeshunting.
①Increasefrequencydifference(△F).
②Decreasegovernorpulsewidth(Fpw).
Changecanbedonebyoneoftheabovemeasuresortheircombinedmeasures.
3)Whenvoltagecontroldelays.
①Increasevoltageadjustmentpulsewidth(Vpw).
②Decreasevoltageadjustmentpulseperiod(Vpint).
Changecanbedonebyoneoftheabovemeasuresortheircombinedmeasures.
4)Whenfrequencycontroldelays.
①Increasefrequencydifference(△F).
②Decreasegovernorpulsewidth(Fpw).
Changecanbedonebyoneoftheabovemeasuresortheircombinedmeasures.