產品內容介紹
AS-BDAP-208離散輸出模塊
同步檢查、通電檢查和同步SESRSYN
同步功能允許在包括斷路器閉合時間在內的正確時刻閉合異步網絡，從而提高網絡穩定性。同步檢查、通電檢查和同步（SESRSYN）功能檢查斷路器兩側的電壓是否同步，或至少有一側不帶電，以確保可以安全閉合。SESRSYN功能包括雙母線和1?斷路器或環形母線布置的內置電壓選擇方案。該功能可檢查手動合閘和自動重合閘，并可進行不同的設置。對于異步運行的系統，提供了同步功能。同步功能的主要目的是在連接兩個異步系統時提供斷路器的受控閉合。它用于大于同步檢查的滑動頻率和低于同步功能設定的最大水平的滑動頻率。但是，此功能不能用于自動同步發電機與網絡。設備控制APC設備控制功能用于控制和監督間隔內的斷路器、隔離開關和接地開關。在評估其他功能（如聯鎖、同步檢查、操作員位置選擇和外部或內部封鎖）的條件后，授予操作許可。設備控制特征：?選擇執行原則以提供高可靠性?選擇功能以防止同時操作?選擇和監督操作員位置?命令監督?操作阻止/解除阻止?位置指示更新阻止/解除鎖定?位置指示替換?聯鎖功能覆蓋?超控同步檢查?操作計數器?抑制中間位置可使用兩種類型的命令模型：?正常安全的直接命令?增強安全的SBO（操作前選擇）
在正常安全狀態下命令被處理，結果位置不受監控。
然而，隨著安全性的增強，命令得到處理，并對結果位置進行監督。正常的安全性意味著只評估命令，而不監督結果位置。增強的安全性意味著，通過對控制對象狀態值的附加監督來評估命令。具有增強安全性的命令安全性始終由CommandTermination服務原語終止。如有規定，可在授權控制下從本地HMI執行控制操作。分接開關位置讀數TCMYLTC有載分接開關的位置可以在線監測。這可以通過使用BCD編碼的二進制輸入信號或通過mA輸入信號來實現。變壓器或整體差動保護功能可以使用實際抽頭位置，以啟用更靈敏的拾取設置。這反過來將使差動保護對低電平內部故障（如繞組匝間故障）更加敏感。用于功能選擇和LHMI顯示的邏輯旋轉開關SLGGIO用于功能選擇與LHMI顯示（SLGGIO）的邏輯旋轉交換機（或選擇器開關功能塊）用于獲得與硬件選擇器開關提供的功能相似的選擇器開關功能。公用事業公司廣泛使用硬件選擇器開關，以便在預設值上運行不同的功能。然而，硬件交換機是維護問題、較低系統可靠性和擴展采購組合的根源。邏輯選擇器開關消除了所有這些問題。
Synchrocheck, energizing check, and synchronizing SESRSYN
The Synchronizing function allows closing of asynchronous networks at the correct moment including the breaker closing time, which improves the network stability. Synchrocheck, energizing check, and synchronizing (SESRSYN) function checks that the voltages on both sides of the circuit breaker are in synchronism, or with at least one side dead to ensure that closing can be done safely. SESRSYN function includes a built-in voltage selection scheme for double bus and 1? breaker or ring busbar arrangements. Manual closing as well as automatic reclosing can be checked by the function and can have different settings. For systems which are running asynchronous a synchronizing function is provided. The main purpose of the synchronizing function is to provide controlled closing of circuit breakers when two asynchronous systems are going to be connected. It is used for slip frequencies that are larger than those for synchrocheck and lower than a set maximum level for the synchronizing function. However this function can not be used to automatically synchronize the generator to the network. Apparatus control APC The apparatus control functions are used for control and supervision of circuit breakers, disconnectors and earthing switches within a bay. Permission to operate is given after evaluation of conditions from other functions such as interlocking, synchrocheck, operator place selection and external or internal blockings. Apparatus control features: ? Select-Execute principle to give high reliability ? Selection function to prevent simultaneous operation ? Selection and supervision of operator place ? Command supervision ? Block/deblock of operation ? Block/deblock of updating of position indications ? Substitution of position indications ? Overriding of interlocking functions ? Overriding of synchrocheck ? Operation counter ? Suppression of Mid position Two types of command models can be used: ? Direct with normal security ? SBO (Select-Before-Operate) with enhanced security
In normal security
the command is processed and the resulting position is not supervised. However with enhanced security, the command is processed and the resulting position is supervised. Normal security means that only the command is evaluated and the resulting position is not supervised. Enhanced security means that the command is evaluated with an additional supervision of the status value of the control object. The command security with enhanced security is always terminated by a CommandTermination service primitive. Control operation can be performed from the local HMI under authority control if so defined. Tap changer position reading TCMYLTC On-load tap-changer position can be monitored on-line. This can be done by either using BCD coded binary input signals or alternatively via an mA input signal. The actual tap-position can be used by the transformer or overall differential protection function in order to enable more sensitive pickup setting. This will in turn make differential protection more sensitive for low level internal faults such as winding turn-toturn faults. Logic rotating switch for function selection and LHMI presentation SLGGIO The logic rotating switch for function selection and LHMI presentation (SLGGIO) (or the selector switch function block) is used to get a selector switch functionality similar to the one provided by a hardware selector switch. Hardware selector switches are used extensively by utilities, in order to have different functions operating on pre-set values. Hardware switches are however sources for maintenance issues, lower system reliability and an extended purchase portfolio. The logic selector switches eliminate all these problems.
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