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ICS T8846自動(dòng)化控制卡件
冗余方案為協(xié)調(diào)每條線路的兩個(gè)保護(hù)功能和一個(gè)或兩個(gè)自動(dòng)重合閘功能的運(yùn)行而制定了規(guī)定端子（見圖3.5.32.4和圖3.5-32.5）。必須使用主/從邏輯來(lái)避免任何時(shí)間競(jìng)爭(zhēng)由于定時(shí)器公差不同而導(dǎo)致的問題。
冗余方案采用第一和第二主保護(hù)每個(gè)方案都有自己的重合閘功能。操作
因此，重合閘功能必須通過將一個(gè)配置為“主”和另一個(gè)配置成“跟隨器”來(lái)協(xié)調(diào)。如果主人
AR首先啟動(dòng)，它延遲跟隨器AR的操作，直到已經(jīng)成功地實(shí)現(xiàn)了重合閘或其他。
如果先啟用跟隨器AR，其死區(qū)時(shí)間開始運(yùn)行，但如果主機(jī)在跟隨器死區(qū)時(shí)間內(nèi)啟動(dòng)，操作
隨動(dòng)器的重合閘功能暫停，主接管并執(zhí)行其重合閘循環(huán)。
跟隨器處于“熱備用”狀態(tài)，僅在主AR或其保護(hù)功能無(wú)法運(yùn)行時(shí)才接管。
來(lái)自故障觸點(diǎn)（如“CO就緒”）的信號(hào)發(fā)送至主機(jī)然而，重合閘將導(dǎo)致“Def”。跳閘后的輸出時(shí)間“t超時(shí)”，這也會(huì)阻止跟隨器AR。
在圖3.5.32.4的電路中，主電路和從電路起作用也可以通過適當(dāng)配置
系統(tǒng)軟件。主/從邏輯
在1?斷路器中提供主/從邏輯
每條線路具有兩個(gè)線路保護(hù)和自動(dòng)重合閘的方案每個(gè)斷路器的功能。
其中一個(gè)重合閘功能由以下人員分配為主功能：
適當(dāng)設(shè)置參數(shù)“主模式”。在成功重合閘之后，其CB（連接如圖3.5.32.6所示
用于所有類型故障的三相跳閘和重合閘）。主重合閘功能向發(fā)送激活的“DELFLR”信號(hào)
跟隨器的“主延遲”I/P將其“閉合CB”命令延遲到跟隨器CB，直到主重合閘功能發(fā)出“閉合CB”，之后是等待時(shí)間作為一種預(yù)防措施，為成功重合閘留出時(shí)間。如果重合閘不成功，輸出保持高
直到信號(hào)“Def”?！疤l”被激活（“延遲Flwr”信號(hào)復(fù)位，并生成“Blk至Flwr”的信號(hào)）。
如果該信號(hào)在跟隨器死區(qū)時(shí)間結(jié)束之前復(fù)位，
對(duì)跟隨器CB的關(guān)閉命令在這是一個(gè)死時(shí)間。
Redundant schemes
Provision is made for coordinating the operation of two protection functions and one or two auto-reclosure functions per line
terminal (see Fig. 3.5.32.4 and Fig. 3.5.32.5).
A master/follower logic has to be used to avoid any time-race
problems due to differing timer tolerances.
A redundant scheme assumes first and second main protection
schemes each with its own reclosure function. The operation of
the reclosure functions therefore has to be coordinated by configuring one as ‘master’ and the other as ‘follower’. If the master
AR starts first, it delays the operation of the follower AR until it
has either achieved successful reclosure or otherwise.
If the follower AR is enabled first, its dead time starts to run, but
should the master start during the follow’s dead time, operation
of the follower reclosure function is suspended and the master
takes over and performs its reclosure cycle.
The follower is on “hot standby” and only takes over, if the master AR or its protection function fails to operate.
The signal from a faulty contact like ‘CO Ready’ to the master
recloser, however, would result in a ‘Def.Trip’ output after the
time ‘t Timeout’ and this would also block the Follower AR.
In the circuit of Fig. 3.5.32.4, the master and follower functions
can also be the other way round by appropriately configuring the
system software.Master/follower logic
Provision is made for a master/follower logic in 1? breaker
schemes with two line protections per line and an auto-reclosure
function per circuit-breaker.
One of the reclosure functions is assigned the role of master by
appropriately setting the parameter ‘Master mode’. After a successful reclosure, the master AR then enables the follower AR,
respectively its CB (the connections are as given in Fig. 3.5.32.6
for a three-phase trip and reclosure for all types of faults).The master reclosure function sends an active ‘DelFlwr’ signal to
the ‘MasterDelay’ I/P of the follower to delay its ‘Close CB’ command to the follower CB until the master reclosure function issues the ‘Close CB’ command, which is followed by a wait time
of 300 ms as a precaution to allow time for a successful reclosure. If the reclosure is unsuccessful, the output remains high
until the signal ‘Def.Trip’ is activated (the ‘DelayFlwr’ signal resets and ‘Blk to Flwr’ signal is generated).
Should this signal reset before the end of the follower dead time,
the close command to the follower CB is issued at the end of the
dead time.
