FCP280底板
感測變壓器次級中產生的電壓
T2次級中產生的電壓矢量相加。這動作向傳感二極管提供電壓，即降壓傳感電壓和并聯電流互感器
通過T2的信號。感測電路? er直流輸出為? 過濾和應用至誤差檢測器和欠頻極限。
當電阻（單位功率因數）負載連接到發電機時，下降電位計兩端出現的電壓導致感應
電壓90度，兩個電壓的矢量和接近與原始感測電壓相同；因此，幾乎沒有變化發生在發電機輸出電壓中。
當滯后功率因數（感應）負載連接到發電機，下降電位計兩端的電壓變得更高與感測電壓同相，以及兩者的組合矢量電壓導致更大的電壓被施加到感測
由于調節器的作用是在感覺直肌? ers
調節器通過降低發電機輸出作出反應
電壓當領先功率因數（電容性）負載連接到發電機，下降電位計兩端的電壓變為與感測電壓的相位以及兩者的組合矢量電壓導致施加到感測recti的電壓較小? 呃。
然后調節器通過增加發電機電壓作出反應。兩臺或多臺發電機并聯運行期間，相互連接
對于無功電壓降，如果? 其中一臺發電機的eld勵磁變得過大并導致循環電流? 哦，在發電機，循環電流將作為感應負載出現在發電機勵磁過大，另一個具有電容性負載
發電機。并聯部件R4和T2將導致電壓發電機調節器過大? eld激勵，以降低
發電機電壓，而其他發電機的電壓調節器將增加發電機電壓。
并聯交叉電流補償模式下并聯發電機運行期間的傳感電路：并聯交叉電流賠償允許兩臺或多臺并聯發電機共享感應無功負載
在以下情況下，發電機系統輸出電壓不會下降或降低：線路電流成比例且同相。這是通過以下方式實現的：
上述并聯無功電壓的動作和電路下垂補償和電流互感器的互連
閉合串聯回路中的二次回路。循環電流導致系統
如前所述，對并聯電壓降補償作出反應
The voltage developed in the secondary of the sensing transformer(s)
and the voltage developed in the secondary of T2 add vectorially. This
action provides a voltage to the sensing diodes that is the vector sum of
the stepped down sensing voltage and the parallel current transformer
signal through T2. The sensing recti? er dc output is ? ltered and applied
to the error detector and underfrequency limit.
When a resistive (unity power factor) load is connected to the generator,
the voltage that appears across the droop potentiometer leads the sensing
voltage by 90 degrees, and the vector sum of the two voltages is nearly
the same as the original sensing voltage; consequently, almost no change
occurs in generator output voltage.
When lagging power factor (inductive) load is connected to the
generator, the voltage across the droop potentiometer becomes more
in phase with the sensing voltage, and the combined vectors of the two
voltages result in a larger voltage being applied to the sensing recti? ers.
Since the action of the regulator is to maintain a constant voltage at the
sensing recti? ers, the regulator reacts by decreasing the generator output
voltage.
When a leading power factor (capacitive) load is connected to the
generator, the voltage across the droop potentiometer becomes out of
phase with the sensing voltage, and the combined vectors of the two
voltages result in a smaller voltage being applied to the sensing recti? ers.
Then the regulator reacts by increasing the generator voltage.During parallel operation of two or more generators interconnected
for reactive voltage droop, if ? eld excitation on one of the generators
becomes excessive and causes a circulating current to ? ow between the
generators, the circulating current will appear as an inductive load to the
generator with excessive excitation and a capacitive load to the other
generator(s). The parallel components R4 and T2 will cause the voltage
regulator of the generator with excessive ? eld excitation to decrease the
generator voltage while the voltage regulators of the other generator(s)
will increase the generator voltage.
Sensing circuit during parallel generator operation in parallel crosscurrent compensation mode: Parallel cross-current compensation
allows two or more paralleled generators to share inductive reactive loads
with no droop or decrease in the generator system output voltage when
the line currents are proportional and in phase. This is accomplished by
the action and circuitry described previously for parallel reactive voltage
droop compensation and the interconnection of the current transformer
secondaries in a closed series loop. Circulating currents cause the system
to react as described previously for parallel voltage droop compensation
