Quick ideal condition quasi-synchronization paralleling method of hydro-generator

Abstract

The invention relates to a quick ideal condition quasi-synchronization paralleling method of a hydro-generator, which is used for solving network incorporation speed and safety problem of generators.The technical scheme is as follows: the method regulates the voltage amplitude of the generator by regulating excitation current of the generator, leads the voltage amplitude to be equivalent to the voltage amplitude of a power system, utilizes a speed regulator of the generator set to regulate the voltage frequency of the generator, leads the voltage frequency to be equivalent to the voltage frequency of the power system, then overlaps a speed-increasing and angle-regulating signal or a speed-decreasing and angle-regulating signal with the corresponding strength on a signal controlled and outputted by the frequency difference PID in the speed regulator of the generator set according to the size of the phase angle difference between the voltage of the generator and the voltage of the powersystem, adjusts the size of the phase angle difference till the phase angle difference delta is 0, finally closes a circuit breaker of the generator, and leads the generator to be quickly incorporated into the power system under ideal parallel conditions. The method can quickly and safely incorporate the generator into the power system and not cause impacts on the generator, power equipment and the power system.

Description

Technical field [0001] The invention relates to a method for quasi-synchronous parallelization of water turbine generators under fast ideal conditions, and belongs to the technical field of power generation and transmission. Background technique [0002] Synchronous paralleling of generators plays a very important role in the safe and stable operation of power plants and power systems. There are three conditions for generators to be paralleled simultaneously: ①Generator voltage frequency f F And power system voltage frequency f X The difference Δf=f F -f X =0; ②Generator voltage amplitude V F And the power system voltage amplitude V X The difference ΔV=V F -V X =0; ③Phase angle of generator voltage δ F Phase angle δ with power system voltage X The difference Δδ=δ F -δ X =0. If Δf, ΔV, and Δδ are all zero at the same time, the generator can be integrated into the power system, it will not cause an impact on the power equipment such as generators and transformers, nor will it cause ...

AI Technical Summary

Problems solved by technology

That is to say, the traditional automatic quasi-synchronous parallel method can only ensure that the amplitude of the generator voltage and the power system voltage are equal and the frequency is similar, but the phase angle difference Δδ cannot be adjusted. Δδ=0 is adjusted by the governor to adjust the generator speed and Set the advance time t through the automatic quasi-synchronization device yq , so that t yq = t h to achieve

This parallel method can neither guarantee that the generator is integrated into the power system when Δf = 0, nor can it ensure that the generator is integrated into the power system when Δδ = 0, nor can it guarantee that the generator is at the same time when Δf and Δδ are Incorporate into the power system at zero time

[0008] In short, the traditional automatic quasi-synchronous paralleling method cannot in principle integrate the generator into the power system under ideal quasi-synchronous conditions

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