Harmonic

 Harmonic Research Paper

Case Study

Main grid Modelling to get Purposes of Wind Farm Harmonic Concentration Evaluation Bartosz Kedra Institute of Electrical power Engineering Available February 2010

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DIgSILENT

Electric power Quality

zero, 00 0, 0000

800, 00 SKR114: Network Impedance, Magnitude in Ohm SKR114: Network Impedance, Magnitude in Ohm

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[Hz]

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IEn Gdansk

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Date: 4/1/2009 Annex: /1

Case Study Power Quality

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1 . Problem

A prospective wind flow farm including 21 turbines with a couple of MW dual fed debut ? initiation ? inauguration ? introduction generators is usually planned to get connected to 110 kV substation in syndication system.

The aim of the study is usually to obtain grid harmonic impedance and basing on generator wind check data estimate voltage THD factor in blowing wind farm connection point.

Pertaining to the evaluation a simple network equivalent looking at ideal harmonic impedance is usually not enough. Therefore , a harmonic model of 110 kV network and transmission system network ought to be build to supply data of harmonic grid impedance in the wind farm connection level.

The network harmonic impedance change with system settings and load conditions. Therefore , an agent number of network configurations and load situations must be analyzed. Picked network configurations are: moving over off a capacitor power supply in syndication system substation, switching away a capacitor battery in transmission system substation, improved short-circuit electricity in power plant substation, moving over off an element of system technology, 110 kV lines style based on series parameters excluding tower topology, disconnection of transmission series and providing the power busbar from a couple of stations.

installment payments on your Network version

Network style build to get purposes on this study contained: 400 kV and 220 kV network topology of north-eastern Polish transmission system and 128 kV distribution system in the area of the harmonic impedance computation point. 400 kV and 220 kV lines info were unit included collection data and tower topology. Distribution system lines info was primarily based only upon 2

Main grid modelling intended for purposes of wind farm harmonic trouble evaluation www.leonardo-energy.org

line data except lines in the number of lines between your calculation stage (station 1) and the local transmission program substation. This series of lines data included tower topology. The group of lines involving the wind plantation connection level (station 1) and the nearby transmission system substation (transmission station 1) is demonstrated in Fig. 1 . Part of distribution system model and transmission program model will be shown in Fig. two and Fig. 3 correspondingly.

STATION 6th

STATION four

STATION a few

STATION two

STATION you

STATION 0

TRANSMISSION STATION 1

STATION 5

STOP 20

Fig. 1 The series of lines between the blowing wind farm connection point (station 1) and the nearest transmission system stop (transmission place 1) STOP 9 TRAIN STATION 8 STOP 7 PLACE 6 STOP 4 TRAIN STATION 3 STATION 2 TRAIN STATION 1 STATION 0

TRANSMITTING STATION you

STATION a few

STATION 20

STATION doze

STATION eleven

STATION 12

STATION 18

STATION 18

STATION 18

STATION 19

STATION 13

STATION 14

STATION 15

Fig. two Part of division system version 3

Example Power Quality

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INDICATION STATION a couple of

TRANSMISSION PLACE 3

TRANSMITTING STATION 5 TRANSMISSION STOP 5 TRANSMISSION STATION 6th TRANSMISSION TRAIN STATION 7 TRANSMITTING STATION almost 8 TRANSMISSION STATION 9

TRANSMITTING STATION 18

TRANSMISSION STOP 11

TRANNY STATION 12

TRANSMISSION PLACE 14

TRANSMITTING STATION 18

TRANSMISSION PLACE 13

TRANSMITTING STATION 12-15

TRANSMISSION TRAIN STATION 21

TRANNY STATION 18

TRANSMISSION STOP 19

INDICATION STATION twenty two TRANSMISSION PLACE 20

TRANSMITTING STATION 23

TRANSMISSION TRAIN STATION 24

TRANSMITTING STATION twenty-five

TRANSMISSION STATION 26

Fig. 3 Part of transmission...

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