Phần 16 KHÓA ĐÀO TẠO TÍNH TOÁN ỔN ĐỊNH VÀ ỨNG DỤNG TRÊN PHẦN MỀM PSSE CHO KỸ SƯ HỆ THỐNG ĐIỆN (Mô hình mô phỏng điện gió trong Phần mềm PSSE)

KHÓA ĐÀO TẠO TÍNH TOÁN ỔN ĐỊNH VÀ HƯỚNG DẪN SỬ DỤNG PHẦN MỀM PSSE CHO KỸ SƯ HỆ THỐNG ĐIỆN (Mô hình mô phỏng điện gió trong Phần mềm PSSE): • Wind Farms. • Dynamic Models for Wind Farms. • Wind Farm Model Tests.

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A Division of Global Power

POWER SYSTEM STABILITY CALCULATION TRAINING

D 7 Wi d F Si l ti Day 7 - Wind Farm Simulation

November 25, 2013 Prepared by: Mohamed El Chehaly

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OUTLINE OUTLINE

• Wind Farms

• Dynamic Models for Wind Farms

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WIND FARMS eBook for You

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Power Flow Representation

 Wind Turbine Generators modeled as

conventional generators with specific

configurations for Qcontrol

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 Wind machine control mode

 0: if this is not a wind machine (by default)

 1: if this is a wind machine that participates in

voltage control with the values of QT (QMAX) and

QB (QMIN) on the data record specifying the

conventional machine)

 2: if this is a wind machine that participates in

voltage control with specified power factor and the

machine’s real power setting (PG on the data

record) used to set the machine’s reactive power

limits

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 Wind machine control mode

 3: if this is a wind machine which operates at a

fixed power with the machine reactive power

output and reactive power upper and lower limits

all equal and set based on the machine power and

the machine’s real power setting PG

 Wind machine PF

 Ignored if the wind control mode is 0

 Is used in setting the machine’s reactive power

limits when the wind control mode is 2 or 3

 Negative value may be specified when the wind

control mode is 3 to represent leading PF

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Types of Wind Farms

 Type 1: Direct connected conventional

induction generator

 Type 2: Wound rotor induction generator

with variable rotor resistance

 Type 3: Doubly-fed induction generator

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Type 1 (WT1) in Power Flow

 The wind control mode should be set as 3

(wind machine with fixed Q based on WPF)

 User should model properly an equivalent

of a wind farm and take into account the

number of wind machines that will be

lumped into an equivalent machine

(Equivalent MBASE = N number of

machines x MBASE of one machine)

 A vast majority of WT1 includes a set of

capacitors to keep the power factor in

steady state within range

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Type 2 (WT2) Representation

 Type 2: Wound rotor induction generator

with variable rotor resistance

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(wind machine with fixed Q based on WPF)

 A vast majority of WT1 includes a set of

capacitors to keep the power factor in

steady state within range

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 Type 3: Doubly-fed induction generator

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(wind machine with +/- Q limits based on

WPF)

(Equivalent MBASE N number of

 No need to add capacitors

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 Type 4: Full size converter unit

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(wind machine with +/- Q limits based on

WPF)

(Equivalent MBASE N number of

 No need to add capacitors

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DYNAMIC MODELS OF WIND

FARMS

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Type 1 (WT1) in Dynamics

 Three models

 WT1G: generator/converter model

 WT12T: wind turbine model

 WT12A: pseudo governor model

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 This model takes into account the rotor flux

dynamics and can be used for single cage or

 At initialization, this model calculates the reactive

power consumption of the machine Qact at given

voltage terminal and MW dispatch and then places

voltage terminal and MW-dispatch and then places

a “hidden” shunt on the machine bus terminal with

the size equal to the difference between Qgen and

Qact

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 WT12T: Two-mass representation of the

wind turbine shaft driven train

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 WT12A: Pseudo governor model

 Model that simplifies and generalizes calculation

of the aerodynamic torque

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 Four models

 WT2E: electrical control model

 WT12A: pseudo governor model

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 WT2G: similar to WT1G with controlled

external rotor resistor

 WT12T: same wind turbine model as the

one used for WT1

 WT12A: same pseudo governor model as

the one used for WT1

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 WT2E: Electrical control model

 Value of the external rotor resistance is calculated

 This model uses the machine rotor speed and

electrical power as inputs and calculates the

portion of the available rotor external resistance to

be added to the internal rotor resistance

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 Four models

 WT3P: pitch control model

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 WT3G: Generator model

 Two models: WT3G1 and WT3G2

 WT3G2 is recommended model for new dynamic

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 WT3T1: Wind turbine model

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 WT3P1: Pitch control model

If Pwind > Pmax Blades are pitched to

set Pmec to 1 pu

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 Two models

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Type 4 (WT4) in Dynamics Type 4 (WT4) in Dynamics

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 WT4G: Generator model

 Reactive power control

Remote bus voltage control

Po er factor control

Reactive power control

The real power injected to the grid is compared to PREFand changes the real part of the current

No machine needs to be simulated

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WIND FARMS MODEL TESTS eBook for You

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Dynamic File for WT1

 WT1G1

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 WT12T1

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 WT12A1

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 WT2G1

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 WT2E1

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 WT12T1

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 WT12A1

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 WT3G1

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 WT3E1

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 WT3E1

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 WT3E1

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 WT3E1

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 WT3T1

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 WT3P1

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 WT4G1

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 WT4E1

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 WT4E1

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 WT4E1

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Power Flow Case

 savnw.sav

Wind generation to be added at this bus

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Power Flow Case

 savnw.sav

 New wind generator buses

Set all codes to 4

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Power Flow Case

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Power Flow Case

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Power Flow Case

 savnw.sav

 Generators

Values calculated automatically based on

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 Turn-on bus 3019 along with its step-up

transformer and solve the load flow

 Convert loads and generators

 Order (ORDR), factorize (FACT) and solve

(TYSL)

 Set the dynamic simulation options by

activating the scan for generators

exceeding angle threshold and by setting

the relative machine angles to the swing

bus (bus 3011)

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 Select all the machine angle channels,

machine electrical power, machine

reactive power

 Select all the bus voltage channels

 Initialize with output file “WT1.out”

 Run for 1 second

 Apply a bus fault at bus 3008

 Run for 0.1 second and clear fault

 Run until t = 10 seconds

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 Repeat the same process as for WT1 but

with enabling only the bus 3020 and its

associated transformer and generator

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 The new output file shall be “WT4.out”

 Open all output files created

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0 75 0.5 0.25

Time (seconds)

10 9

8 7

6 5

4 3

2 1

0

0 -0.25

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8 7

6 5

4 3

2 1

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0.9 0.8

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QUESTIONS?

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Tiêu đề	Mô Hình Mô Phỏng Điện Gió Trong Phần Mềm PSSE
Tác giả	Mohamed El Chehaly
Trường học	Global Power
Chuyên ngành	Power System Stability
Thể loại	Khóa Đào Tạo
Năm xuất bản	2013
Thành phố	Unknown

Định dạng
Số trang	69
Dung lượng	3,84 MB