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Synchronous generator protection

A technology for synchronous generators and generators, applied in the direction of controlling generators, emergency protection circuit devices, emergency protection devices for automatic disconnection, etc., can solve problems such as loss of unstable generators, generator damage, etc.

Inactive Publication Date: 2015-07-15
EMPIRE TECH DEV LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if only one generator is out of sync, allowing that generator to continue to operate out of sync can wreak havoc on the generator due to high magnitude currents and pulsating torque
There is also a risk of losing auxiliary units of unstable generators and auxiliary units of nearby synchronous generators

Method used

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Embodiment Construction

[0030] In the following detailed description, reference is made to the accompanying drawings which form a part hereof. In the drawings, similar symbols typically identify similar parts, unless context dictates otherwise. The exemplary embodiments described in the detailed description, drawings, and claims are not intended to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It should be understood that the aspects of the present disclosure described generally herein and illustrated in the accompanying drawings may be arranged, substituted, combined, divided, and designed in many different configurations as explicitly and implicitly disclosed herein.

[0031] figure 1 is a schematic diagram of a synchronous generator system 100 having a prime mover (or turbine) 102 , a generator 104 , a transformer 106 , a transmission network 108 , a subsystem 110 and a stability out...

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PUM

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Abstract

A scheme for synchronous generator protection is provided. Based on generator input and transformer output phase information, along with the energy function concept, the scheme for synchronous generator protection provides early detection of a loss of synchronism of a generator. As such, the generator with loss of synchronism can be tripped before the generator actually slips. An example for how such a synchronous generator protection schemes may function, is also provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority under 35 U.S.C. § 119(d) to corresponding patent application No. 1229 / CHE / 2009, filed in India on May 27, 2009, the entire disclosure of which is incorporated herein by reference. Background technique [0003] In the power transmission system, the synchronous generator is connected to the transmission line through a step-up transformer, and the corresponding turbine and excitation control bring the synchronous generator to the rated frequency and voltage. In steady state, all generators in the system are at the same frequency, and the phases of these generators are constant, providing constant power and reactive power output. [0004] A major disturbance (eg, a fault in a transmission line) can force a generator or genset out of synchronization. When a fault forces a generator or genset out of synchrony, the one generator or genset must be brought back into synchrony with the power transm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/10H02H3/26H02J3/40
CPCH02H3/48H02H7/06
Inventor 卡兰珀·拉杰莫汗·帕迪亚
Owner EMPIRE TECH DEV LLC