公开(公告)号：WO1996015570A1

公开(公告)日：1996-05-23

申请号：PCT/US1995005124

申请日：1995-04-24

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  GOOD, Jef, William ,  MROWIEC, David, J.

IPC: H02H07/06

CPC classification number: H02P9/302 ,  H02H7/065 ,  H02P2101/30

Abstract: A shorted rectifying diode protection system for a synchronous generator (100) having a stationary exciter field which induces a voltage in a rotating exciter armature when energized by an exciter drive current, the voltage being rectified by a plurality of rotating rectifiers (108) and applied to a rotating field winding (114) to induce an output voltage in a plurality of main stator output phase windings (120), the output voltage being controlled by a voltage regulator (150) having peak excitation current protection means, comprises a circuit (162) for detecting actuation of the excitation current protection and generating a field protection monitor signal, a circuit for discriminating a shorted exciter field and generating a protection lock-out signal (182), and a logic circuit (168) responsive to the field protection monitor signal and the protection lock-out signal for generating a shorted rectifying diode protection signal (186). Upon generation of the protection signal, the system disables the voltage regulator (110) to preclude collateral damage to the generator. The method of detecting a shorted exciter field rectifying diode comprises the steps of a) monitoring the peak current supplied to the exciter field (112) from the voltage regulator (150), b) generating a field protection monitor signal when the peak current exceeds a given threshold, c) generating a protection lock-out signal (182) if the exciter field is discriminated as shorted, d) de-energizing the generator (100) in response to the protection monitor signal, and e) inhibiting the step of de-energizing the generator in response to the protection lock-out signal.

Abstract translation: 一种用于同步发电机（100）的短路整流二极管保护系统，具有固定激励器场，当由激励器驱动电流激励时，其在旋转激励器电枢中感应电压，该电压由多个旋转整流器（108）整流并施加 通过具有峰值激励电流保护装置的电压调节器（150）来控制输出电压，以产生多个主定子输出相绕组（120）中的输出电压的旋转励磁绕组（114），包括电路（162 ），用于检测激励电流保护的致动并产生场保护监控信号，用于识别短路的励磁机场并产生保护锁定信号（182）的电路，以及响应于现场保护监视器的逻辑电路（168） 信号和用于产生短路整流二极管保护信号的保护锁定信号（186）。 在产生保护信号时，系统禁用电压调节器（110）排除对发电机的附带损坏。 检测短路励磁场整流二极管的方法包括以下步骤：a）监测从电压调节器（150）提供给激励器场（112）的峰值电流，b）当峰值电流超过 给定阈值，c）如果激励器场被鉴别为短路，则产生保护锁定信号（182），d）响应于保护监视信号使发电机（100）断电，以及e）禁止de - 响应于保护锁定信号激励发电机。

公开(公告)号：EP0803144A1

公开(公告)日：1997-10-29

申请号：EP95917683.0

申请日：1995-04-24

Applicant: SUNDSTRAND CORPORATION

Inventor： GOOD, Jef, William ,  MROWIEC, David, J.

IPC: H02H7 ,  H02P9

CPC classification number: H02P9/302 ,  H02H7/065 ,  H02P2101/30

Abstract: A shorted rectifying diode protection system for a synchronous generator (100) having a stationary exciter field which induces a voltage in a rotating exciter armature when energized by an exciter drive current, the voltage being rectified by a plurality of rotating rectifiers (108) and applied to a rotating field winding (114) to induce an output voltage in a plurality of main stator output phase windings (120), the output voltage being controlled by a voltage regulator (150) having peak excitation current protection means, comprises a circuit (162) for detecting actuation of the excitation current protection and generating a field protection monitor signal, a circuit for discriminating a shorted exciter field and generating a protection lock-out signal (182), and a logic circuit (168) responsive to the field protection monitor signal and the protection lock-out signal for generating a shorted rectifying diode protection signal (186). Upon generation of the protection signal, the system disables the voltage regulator (110) to preclude collateral damage to the generator. The method of detecting a shorted exciter field rectifying diode comprises the steps of a) monitoring the peak current supplied to the exciter field (112) from the voltage regulator (150), b) generating a field protection monitor signal when the peak current exceeds a given threshold, c) generating a protection lock-out signal (182) if the exciter field is discriminated as shorted, d) de-energizing the generator (100) in response to the protection monitor signal, and e) inhibiting the step of de-energizing the generator in response to the protection lock-out signal.