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  :: Adaptive Noncommunication protection
  :: °ü¸®ÀÚ 2007-06-13 17:18:50 , Á¶È¸ :40952  
  :: File download   [pdf : 1131 KB  Download: 8594]
Adaptive Noncommunicalion Protection
for Power Lines 80 Schellle 1:
The Delayed Operation Approach
Bo, Z,Q.
  Author Affiliation: ALSTOM, Paris, France
  Abstract: This paper proposes II new Icchnique in power line pro¡¤ tecliro, the adaptive noncommunication protection. In this technjque, protection relays make operate or restraint decisions, adapting to system and fault conditions, withaul the need for communication link.
Operation without communication links to signal the remote end relay is achieved by the detection lind identification of the operation of the circuit breaker at the remote end of he protected line section. An algorithm based on the symmetric componems is proposed to deteCt and identify the balance condidon of the sy61em during the fall 11. The paper is focused on one of the three protection schemes based on the new techniqnne, the delayed operation scheme; Simulation studies carried
out for various systems and fault conditions have demoostratec the fea ¡¤ sibility of the scheme.
   Keywords: Adnp,ive protection , noncommunication protection, BO protection.
  Preprint Ord1r Number: PE-007PRD (8-200 1)
  Diseussion Deadlint: January 2002
 
Adaptive Noncommunication Protection
for Power Lines BO Scheme 2:
The Instant Operation Approach

Bo, Z.Q.
  Author Affiliation: ALSTOhl, Paris, France
  Abstract: This paper presents the instant operation scheme of Ihe adaptive noncommunication protection tedulique for power lines. In the rechnique, protection /elays make Ilipping or redosurc decisions adapting to syslem and fault conditions wilhout the need for communication links. The noncommunlcation is achieved by the detection of whether or not the system is in a balanced operation, in order to identify the breaker operatlon lit the remote end of tbe protected Scction. In the scheme, the distance relay will trip instantly when II fault is detected outside its zone 1 but within its zone 2 reftcn. Subsequently it detects
whether the fault is on the protected section or not, and recloses when a faull is cleared from the protected line section. Simula,ion studies with responses to various system and fault conditions have shown that the techniquc is able to give fast and correct esponse without the need for a communication lil1k.
  Keywords: A da~tjvc protection, noncommunication proteclicn, adapth:e re closure, opt!mnl rt c!osurc, BO protection.
  preprint Order Xumbel: ¡¤PE-008PRD (8-2001)
  DIscussion Deadline: Ja!lualy.2002

 
Adaptive NOllcommunication Protection
for Power Lines BO Scheme 3:
The Accelerated Operation Approach

Bo, Z,Q,
  Author Affiliation: ALSTOM. Paris, France
  Abstract: This paper presents the accelerated operation &cherne of the adaptive noncommunication protection technique for power lines with compiex configurations, such as multi-end feeder and ring main.
In the scheme. the overcurrtnt di rectional relays are arranged in two operating modes, the fixed time operation and accelerated operation.
The relys with faster operating time in the conventional time grading coordination remain unchanged. The new technique is employed to enable accelerated operation to be aehieved for the relays that are in the positions for which slow operating time is set when using ccnvcntional lime grading technique. For a fault occurring on the protected system, the relays of fixed time operation mode will operate at the preset Time
for the fault with in its protected direction. The relays that are programmed to lise acceleratecd operation mode will delennlne whether a fault is on the proectcd section or not by using the BO leChnlque, that is. to detect the circuit breaker operation by determining whether the line seeticr. is in a balanced operation conditi on or not. The relay makes accelerated tripping decisions for a faul, on its protected section. Simulation studles of the responses to vari eus system and fault conditions
show that tlle scheme can significantly increase the speed of the relay responses in thc protcction of power line systems with complex cinfigrations.
  Keywords: Adaptive prot!!Ction, noncommunication protection, OOfcrcuro:nt directional relay, BO ~ro:ecdon.
  Preprint Order Number: PE-090PRD (8-2001)
  Discussion Dtadline: January 2002
 
An Agent-Based Current Differential
Relay for Use with a Utili.ty Jntranet

Coury,¡¤D.V.; Thorp,J .S.; Ho p kinson, K M.; Birman, K.P.
  Author ,Affillation: University of Sio Paulo. Sao Peuln. Brazil; Cornell University, Ithaca, NY
  Abstract: This paper proposes an e,gent-bnsed current differential relay for use with a communicati on network. Agents are softw are processes capable of searching for information in networks, in teracting with pieces of equipmtnt. and perfornling tasks on behalf of their ownen; (relays). Results ilIustntting the performance of the ag.ent-based differential method proposed aCling within a communication structure are presented fordiffenmt (raffic conditions. These results also show that a d~ dicated uti li t) Intranet is a viable and recommended option os a communication media for the proposed scheme.
  KeYwords: Differential protection, relaying, transmission lines, agent technology,
  Preprin Order Number: PE-598PRD (8-2001 )
  Discussion Deadline: January 2002

 
 
  :: File download   [pdf : 1131 KB  Download: 8594]
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