IS200WETBH1ABA通用電氣卡件
保護警報。六個保護報警指示器提供DECS-100保護功能的狀態。
報警指示器包括過勵磁停機、過勵磁限制、欠勵磁限制，發電機過電壓、發電機感應損失和欠頻。當使用DECS-100保護時功能檢測報警條件，相應的指示燈從黑色變為紅色。控制狀態。兩個控制狀態指示器指示VAR/PF和手動模式何時激活。
當FCR控制模式激活時，手動模式激活指示燈從黑色變為紅色。這個DECS-100在AVR模式下運行時，VAR/PF模式激活指示燈從黑色變為紅色并且選擇功率因數或VAR的校正。
開關狀態。三個開關狀態指示燈指示DECS-100控制輸入何時打開或關閉當用戶提供的觸點位于時，52JK開關打開指示燈從黑色變為紅色端子52J和52K閉合。當該控制輸入打開時，可以選擇PF或VAR模式在計量、操作和報警屏幕的操作選項卡上進行。52LM開關閉合當終端52L和52M處的用戶提供觸點處于以下狀態時，指示器從黑色變為紅色：關閉當該控制輸入關閉時，并聯控制和下垂處于非活動狀態。當用戶提供的端子VM和VMC觸點處于以下狀態時，VM開關閉合指示燈從黑色變為紅色：關閉當該控制輸入關閉時，電壓匹配功能激活。
計量信號
計量信號指示燈閃爍，以指示何時啟動計量。數指示器旁邊跟蹤計量和狀態指示器更新的次數。什么時候單擊“計量”按鈕或單擊菜單欄上的“計量”，然后單擊“禁用計量”計量信號指示燈停止閃爍，計量更新計數器停止遞增，并且計量功能停止更新。BESTCOMS可通過自動計算PID參數來設置發電機穩定性。PID代表比例、積分、微分。“比例”一詞的意思是DECS-100輸出與觀察到的變化量成比例或相對。積分意味著DECS-100輸出與觀察到變化的時間量成比例。積分作用這消除了偏移。導數意味著DECS-100輸出與所需速率成比例激發變化。微分動作避免了勵磁過沖。
BESTCOMS在用戶選擇發電機頻率后自動計算PID值，發電機時間常數（T’do）和勵磁機時間常數（Texc）。使用BESTCOMS，用戶可以生成新的PID編號，添加到PID列表文件，并更新控制增益或中的AVR增益設置步驟響應屏幕。
點擊PID按鈕可訪問PID窗口（圖5-18）。只能單擊PID按鈕當控制增益屏幕的穩定范圍設置被設置為值21時（設置為21允許通過PID窗口輸入自定義穩定性設置。）然后，當控件的字段
更改或選擇增益屏幕時，PID按鈕從灰色變為黃色，按鈕可以單擊以查看PID窗口。修改、計算和更新PID編號后單擊更新設置屏幕按鈕關閉窗口。然后顯示修改后的PID值在控制增益屏幕上。
Protection Alarms. Six protection alarm indicators provide the status of DECS-100 protection functions.
Alarm indicators include Overexcitation Shutdown, Overexcitation Limiting, Underexcitation Limiting,
Generator Overvoltage, Loss of Generator Sensing, and Underfrequency. When a DECS-100 protection
function detects an alarm condition, the appropriate indicator changes from black to red.
Control Status. Two Control Status indicators indicate when the VAR/PF and Manual modes are active.
The Manual Mode Active indicator changes from black to red when the FCR control mode is active. The
VAR/PF Mode Active indicator changes from black to red when the DECS-100 is operating in AVR mode
and correction of power factor or vars is selected.
Switch Status. Three Switch Status indicators indicate when the DECS-100 control inputs are open or
closed. The 52JK switch open indicator changes from black to red when the user-supplied contacts at
terminals 52J and 52K are closed. When this control input is open, selection of PF or VAR mode can be
made on the Operation tab of the Metering, Operation, and Alarms screen. The 52LM switch closed
indicator changes from black to red when the user-supplied contacts at terminals 52L and 52M are
closed. When this control input is closed, parallel control and droop is inactive. The VM switch closed indicator changes from black to red when the user-supplied contacts at terminals VM and VMC are
closed. When this control input is closed, the Voltage Matching function is active.
Metering Signal. The Metering Signal indicator flashes to indicate when metering is active. A number
beside the indicator tracks how many times the metering and status indicators have been updated. When
the Metering button is clicked or Metering on the Menu bar is clicked followed by Disable Metering, the
Metering Signal indicator stops flashing, the metering update counter stops incrementing, and the
metering functions stop being updated. BESTCOMS enables generator stability to be set through the automatic calculation of PID parameters.
PID stands for Proportional, Integral, Derivative. The word proportional means that the response of the
DECS-100 output is proportional or relative to the amount of change that is observed. Integral means that
the DECS-100 output is proportional to the amount of time that a change is observed. Integral action
eliminates offset. Derivative means that the DECS-100 output is proportional to the required rate of
excitation change. Derivative action avoids excitation overshoot.
BESTCOMS automatically calculates PID values after the user selects the generator frequency,
generator time constant (T'do), and exciter time constant (Texc). With BESTCOMS, the user may
generate new PID numbers, add to a PID list file, and update the AVR gain settings in the Control Gain or
Step Response screens.
The PID window (Figure 5-18) is accessed by clicking the PID button. The PID button can be clicked only
when the Stability Range setting of the Control Gain screen is set at a value of 21. (A setting of 21
enables the entry of custom stability settings through the PID window.) Then, when a field of the Control
Gain screen is changed or selected, the PID button changes from gray to yellow and the button can be
clicked to view the PID window. After the PID numbers are modified, calculated, and updated, the PID
window is closed by clicking the Update Setting Screen button. The modified PID values are then shown
on the Control Gain screen.
