ETAP发电机启动
The ETAP Generator Start-Up module is a special feature of the ETAP Transient Stabilityprogram. The type of analysis provided by this module is particularly necessary for special
conditions such as when the connection to a power grid is lost and recovery of the power supply
to critical loads is mandatory. Under these conditions, a cold stand-by generator is started up as
an emergency power source and progresses through acceleration and load acceptance stages
before reaching its final state.
This module will allow you to study the dynamic behavior of the starting generator (generator
frequency, speed, mechanical power, voltage, etc.) as loads are added during the start-up
transient. It also allows you to observe dynamic behaviors of accelerating motors (both induction
and synchronous motors) as they are energized by the starting generator.
The following is a list of requirements and conditions that apply to the Generator Start-Up
module:
1) This module is designed for the simulation of a single starting generator, which initially is
connected to a de-energized network. The starting generator should be the only source
in the network that is studied.
2) Only Subtransient Salient Pole model is supported for the Generator Start-Up module.
Thus, the starting generator needs to be modeled as a salient pole machine.
3) The exciter and governor models of the starting generator need to be modeled with
special capabilities and control mechanisms for the start-up process, including fuel flow
at reduced speeds, exciter field flashing, etc. Note that standard exciter and governor
models are suitable to represent generator operations starting from the steady state,
thus they do not have these special capabilities.
4) Currently, ETAP includes only two control models in its standard generator control model
library (exciter type ST1D and governor type HYDR) that can be used to simulate the
effects of generator start-up process. To simulate other types of exciter and governor
models for generator start-up simulation, the User Defined Models (UDM) module needs
to be used.
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