产品内容介绍
AS-BDAP-208离散输出模块
同步检查、通电检查和同步SESRSYN
同步功能允许在包括断路器闭合时间在内的正确时刻闭合异步网络，从而提高网络稳定性。同步检查、通电检查和同步（SESRSYN）功能检查断路器两侧的电压是否同步，或至少有一侧不带电，以确保可以安全闭合。SESRSYN功能包括双母线和1½断路器或环形母线布置的内置电压选择方案。该功能可检查手动合闸和自动重合闸，并可进行不同的设置。对于异步运行的系统，提供了同步功能。同步功能的主要目的是在连接两个异步系统时提供断路器的受控闭合。它用于大于同步检查的滑动频率和低于同步功能设定的最大水平的滑动频率。但是，此功能不能用于自动同步发电机与网络。设备控制APC设备控制功能用于控制和监督间隔内的断路器、隔离开关和接地开关。在评估其他功能（如联锁、同步检查、操作员位置选择和外部或内部封锁）的条件后，授予操作许可。设备控制特征：•选择执行原则以提供高可靠性•选择功能以防止同时操作•选择和监督操作员位置•命令监督•操作阻止/解除阻止•位置指示更新阻止/解除锁定•位置指示替换•联锁功能覆盖•超控同步检查•操作计数器•抑制中间位置可使用两种类型的命令模型：•正常安全的直接命令•增强安全的SBO（操作前选择）
在正常安全状态下命令被处理，结果位置不受监控。
然而，随着安全性的增强，命令得到处理，并对结果位置进行监督。正常的安全性意味着只评估命令，而不监督结果位置。增强的安全性意味着，通过对控制对象状态值的附加监督来评估命令。具有增强安全性的命令安全性始终由CommandTermination服务原语终止。如有规定，可在授权控制下从本地HMI执行控制操作。分接开关位置读数TCMYLTC有载分接开关的位置可以在线监测。这可以通过使用BCD编码的二进制输入信号或通过mA输入信号来实现。变压器或整体差动保护功能可以使用实际抽头位置，以启用更灵敏的拾取设置。这反过来将使差动保护对低电平内部故障（如绕组匝间故障）更加敏感。用于功能选择和LHMI显示的逻辑旋转开关SLGGIO用于功能选择与LHMI显示（SLGGIO）的逻辑旋转交换机（或选择器开关功能块）用于获得与硬件选择器开关提供的功能相似的选择器开关功能。公用事业公司广泛使用硬件选择器开关，以便在预设值上运行不同的功能。然而，硬件交换机是维护问题、较低系统可靠性和扩展采购组合的根源。逻辑选择器开关消除了所有这些问题。
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 1½ 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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