savr - etip snet

SAVR

Automatic Secondary Regulation of Voltage

and Usage of Reactive Power

EGÚ Praha Engineering,a.s.

Podnikatelská Str. 539, 190 11 Praha 9 – Běchovice

Phone: + 420 603 247 976, e-mail: [email protected]

www.egu-prg.cz

mailto:[email protected]



Within the scope of company´s activites in the field of System and Ancillary

Services in the Power Sector there is a dominant know-how and technical ability

in the field of Renewable Energy Sources – RES. This covers the development

and application of methodologies and algorithms, SW and HW systems and

technical tools for the regulation of the power network parameters - voltage and

reactive power of the systems - at all nominal voltage levels.

Characteristic products:

SAVR - Automatic System of Voltage and Reactive Power Control

ARN - Automatic Voltage Controller

SRU - Group Voltage Controller

Dynamic models of Transients in Power Networks

Verification model for sensitivity analyses

Analyses and Dynamic Models of "Island"

EGÚ PRAHA ENGINEERING, a.s.

Dreg400 - regulating deviation of voltage 400 kV

dU110 - needed change of voltage 110 kV Areg - regulating constant

Ureg110 - real (measured) value of voltage 110 kV

Uset110 - set value of voltage 110 kV for GE

Areg

Uset110

Ureg110

Dreg400WFMS

Uset400

Ureg400

0.0

+

-+

+

Limitation due to voltageon lower lewels

Non-sensivity

Limitation

dU110

+Dreg max

-Dreg max

Uset400 - set value of voltage 400 kV at Tariverde Ureg400 - real (measured) value of voltage 400 kV at Tariverde

Block scheme of the regulator 400 kV Tariverde

1 2 3 4 5 6 7

Legend:

+

dUtap0

0 ... tap number was not changed

1 ... tap number was changed

dUtap - set value change corresponding to the 400/110 transformer tap change

Uset 400

TOL400 = -0,5kV TOL400 = 0,5kV

- No regulator reaction

- Regulator reacts

SAVR

Automatic voltage regulation and reactive power system

SAVR The SAVR system is a set of hardware and software tools that make it possible

to achieve the desired benefits in the controlled power system. The regulatory

activity itself can be provided by means of these following devices (called action

members):

• Generators of all types of power plants

• Compensation devices - static and rotary compensators, power reactors

• Transformers

It can be generally said the systems of U and Q control are mainly designed in

a three-level hierarchy

REGULATION OF VOLTAGE AND REACTIVE POWER


WHY AN AUTOMATIC SYSTEM OF U AND Q REGULATION – SEE THE

ACCENT ON THE EXPECTED BENEFITS OF U AND Q CONTROL

Increased safety of the operation of the regulated power system

Increasing the efficiency of operation of the regulated power system

/reducing technical losses/

Improving the quality of electricity supply to the end customer

Compliance with the tolerance values of reactive power flow agreed with the

neighboring power system

Elimination of the negative reverse effect of the wind and photovoltaic power

plants on the regulated power system

Elimination of the reverse effect of industrial wholesale customers on the

regulated power system

Reduction of the claims on the dispatcher of the regulated power system

Elimination of reactive power dragging of the electrically close generators


REGULATION OF VOLTAGE AND REACTIVE POWER

First step: Evaluation of variants of possible ways of regulation:

regulation U

regulation Q

regulation cos phi

Selected Variant : REGULATION U

/ ** The cos phi control can cause a problem with network stability. Voltage and reactive power are affected

by active power (Overvoltage occurrence in the system). ** Regulation Q does not help the system and

regardless of system requirements, Q is constant /

Regulation of U - Coordinated cooperation of generators and transformers.

Properly adjusting the tap position of the superior transformer results in reduction of

overflows Q, while maintaining the operating point of the generator in the middle of

the P Q diagram. There is therefore a regulatory reserve in the generator excitation

system being used by the SAVR.

Project for the ČEZ Distribution a. s.

Regulation of voltage and reactive power

THE MORE COMPLEX THE CONTROLLED GRID IS,

THE GREATER ARE REQUIREMENTS FOR ITS REGULATION


Project beginning in the year 2000 - nowadays still under

continuation

3 areas:

ČEZ Střed (Central),

ČEZ Sever (North),

ČEZ Morava

Power plants, industrial companies, renewable resources

Project for the ČEZ Distribution a. s.

Regulation of voltage and reactive power




Voltage regulation example

Unregulated power system of 110 kV:

Record of the day course of voltage

Regulated power system of 110 kV:

Record of the day course of voltage


Regulatory process

Voltage regulation

Record of the day course of voltage and reactive power

Voltage and reactive power in the system have a local character. Voltage

in the individual points of the system may be different.

Set value

Regulated value

Reactive power

Automatic

maintenance

of voltage

Active proposing the Q changes in order to keep the voltage within

the required limits.


cos Φ VAR controlled

When controlling the voltage

the cos Φ is not necessary to be kept

Regulation Range Enlargement for Voltage 400 kV

WITH THE INCREASE OF GRID COMPLEXITY, THE NEED

FOR ITS AUTOMATIZATION IS GROWING


Number of regulatory steps on the transformers is with SAVR reduced.

The transformer may no longer regulate the fluctuation of 110 kV

voltage, but only its own voltage changes.


Reduction of number

of switches

Decrease of number of tap changes on TS/110 kV and 110 kV/VN

transformers (this saves transformers - lifetime extension, and

eliminates large sudden voltage variations)



Principles of automatization of voltage regulation and usage of reactive power


FOR ITS AUTOMATIZATION IS GROWINGC

Terciary

(TRV)

Secondary

(SAVR)

Primary

(AVR)

on the level Regulation hierarchy

Dispatching

Production /

Generation

Generator

SAVR systems are mainly used to regulate complex distribution grids

at primary and secondary level

data regarding voltage,

reactive tension, …


THE AUTOMATIC SECONDARY REGULATION OF VOLTAGE

WILL, HOWEVER, BRING MAINLY THE TECHNICAL BENEFITS

Overview of additional benefits from implementation of SAVR

Elimination

of overflows

of reactive power SAVR eliminates the overflows of reactive power


BRUSH Thermal Power Plant

FCU Enercon

Wind Park1

PPC Vestas

Wind Parkn

Hydro-power

Plant

SAVR

Q Q Q Q

Voltage is being influenced by all the generators, transformers and reactors connected to

the pilot node. SAVR capability makes it possible in the pilot node to connect different

primary systems (different manufacturers, different technologies, different way of

connection to the primary system).

! WARNING: The sources being outside of the SAVR

can even act against the SAVR !

Pilot node e.g. bus – bar 400kV



Modbus RTU IEC870-5-104

Modbus TCP

DI, DO

Integration of different

primary systems

This is why: SAVR - Automatic Secondary Regulation of Voltage and Reactive Power


Principles of automation of voltage and reactive power regulation




CERTIFICATION

Test the limits at Pmin

Umin and Umax

Reachable PQ diagram

Test the limits at Pmax

Umin and Umax




After the certification




The conceptual solutions

ARN - substation or dispatch

center

SRU - Power plant

ARN and SRU – substation or Power plant

1.

2.




ČEZ Nord

Power plant Prunéřov 1 Heat plant

Trmice

Industrial

power plants

Chemopetrol

Power plant Ledvice

Heat

plant Komořny

ARN

SRU SRU

Control

system

Technology Technology

Power plant Power plant

Dispatching, substation

n



ARN - substation or dispatch

center

SRU - Power plant



Substation

Rahman

Wind park

Alpha

ARN

SRU

Control

system

Technology

Substation, power plant

Wind park

CAS

Wind park

Topolog

Wind park

Ventus

ARN and SRU – substation or Power plant





Key technical steps of implementation:

REALIZATION OF SINGLE REGULATED PRODUCTION SITES

SHOULD BE JUST A QUESTION OF MONTHS

Initial project Developing (for each generator) the initial project providing

compatibility of technical devices: dispatching <=> generation

Regulator’s

connecting project

Developing the project for connecting regulator to the

technology of generation

Regulator’s

technology delivery Supply of regulating technical and programming devices

Regulator’s

connection Connecting the regulator to the generator’s technology

Regulator’s

testing

Assembly verification , carrying out the pre-complex and

complex tests and training the staff

Service Set prerequisites and process of prophylactic and irregular

maintenance

SAVR

supplier

Local

designer

SAVR

supplier

Assembler

or

Operator

SAVR

supplier

SAVR

supplier +

Operator

Realization takes 6 - 12 months, depending on technical conditions and

operational potential (shut downs etc.) of the power plants

1.

2.

3.

4.

5.

6.


First system SAVR in the Czech

Republic was designed and installed

by the EGU Praha Engineering, a. s.

TSO

Important realization of SAVR

System power plants R E S

First system SAVR in the Romania

was designed and installed


SAVR

Hradec u Kadaně SAVR Tariverde


First system SAVR in the Czech Republic was designed and installed


DSO

Fossil power plants R E S

SAVR

Horní Životice

Industrial areas

SAVR

ArcelorMittal

SAVR

ČEZ Morava

Important realization of SAVR


ARN

SRU SRU

Control

system

Technology Technology

Power plant

Dětmarovice

Dispatching Ostrava

Realization of SAVR Ostrava

ARN – dispatch center

Ostrava

SRU - Power plant

Třebovice

Dětmarovice


Power plant

Třebovice

/Commissioning : Year 2002/

Control system

Mikrodispečink Diagnostics

and archiving

PCM

ARN

DSO Power plants

PCM

ARN Ostrava

PCM

Communication line

Dispatch Power plants

Terciary

regulation

Czech Republic

Realization of secondary voltage control in the

industrial enterprises

SAVR Unipetrol

SAVR ArcelorMittal

Benefit: The power operators and producers

are no longer penalized for not keeping the power

factor and for Q overflows

They support and help the power

system of 110 kV

SAVR Unipetrol

• Industrial enterprise - production of chemicals (including petrol and diesel)

• Control of the generators TG10, TG11, TG12, TG13 and TG14 (red in the

diagram)

• Generators are connected to the network 6 kV

• Voltage of 110 kV control

SAVR Mittal

• Industrial enterprise - iron processing

• Control of the generators TG1-TG8, TG10

• Control of the transformers (number: 28)

• Checking the voltage at 53 substations

• Generators are connected to the network 6 kV

• Voltage of 22 kV control

SAVR Mittal

1

QM1

Raška Karel

T643T644T5002T5001

1

2

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T12 T6

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3629

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1.

2.

3.

5.

4.

104 84 46 35 21 26 15

110 111

ÚK k.č.2

k.č.32

k.č.33

k.č.1

k.č.24

k.č.18 KD

ELNA

ELNA

P250

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SJV

k.č.7

SL.2

k.č.2

P250

k.č.20

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k.č.34

ELNA

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k.č.3

AGLO 3

k.č.8

BL1

k.č.23

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P800

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21

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19

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16

34

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21

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ELNA.

Kyslikárny

1 3 2

Lešetín.

Autokola obj.9

obj.2 Slév.1

Slév.2 -6kV

Slév.2 -22kVZáv.15-22kV

Zu

šle

ch

. Z15

6kVKS

RHJ26

Aglo.1

Aglo. 3

Řed.

UOD

Ocel.SN

ZPO1

VP

Koks.1TVP

OSO Kov.1

P

800 Šrot.

Koks.21

Koks.2

RHJ22ELO 6kV

R11 R21

CK6kV

CK22kV

RN1 RN2

HAV.

SJVR10 R20

ELO 22kV

HSCC

Kunčice 110kV

2

222222

TG10

88

TG6

6

37

16

1612

17 3

VTK 1

19

Vratimov R110kV

10

76

6

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1

3

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2

2

6

10

2034

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L4

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PP 2

T1103

T201

T202

T1101 T1102

R22kV

PP 1R22kV

PP 3

14

10

128

7

810

22

6

15

46

38

2

18

37

1

7

12

3 7

R22kV

Minihuť

R6kV MH

Válc. P1500

R22kV MH

Minihuť R110kV

TM1TM2TM3

L1 L2 L3

L5003

5

Od

Do

Měsíc - rokJméno Podpis

PŘENOSY A ŘAZENÍ NH

76

71

12

1 5 1 2

L14

42

L98SME

T101T101 T102 T102

R1.15 R1.1 HRM2.1a HRM1.1a

ČOV Ostravice ČS Hrabůvka

3 4

ČS Vítk. Aglo R15/1

5kV

k.4 k 59

22kV

M1

7 19 20

19 20

3

17

Poslední úprava :

1316 6

T1

TG9

7

111

4

M3T M3 M3

44

9

17

4

48

2665

9

22

3

12

9

8.8.2001

VálcovnaP 1500

VH SJV

SJV

L5003

Autokola

21

1

20

2

122

1

71831

2011

10811

8

6 24 78

3129

246

1312 181

114 116

11 1 5 12

31 32

78

49

94

SAVR Mittal

Excitation

systems

G

TG1

Excitation

systems

G

TG10

SAVR

SCADA

Dispatch ČEZ

IEC870-5-101

IEC870-5-104

1

QM1

Raška Karel

T643T644T5002T5001

1

2

T20 T21 T22 T11 T13

T12 T6

T9 T10

67

T14

T23

T622 T621

T16 T15

T2T3 T5T8T4T7

363

3 91

4

1 1

2

28

2

2 34

3629

44

22242

Z

1.

2.

3.

5.

4.

104 84 46 35 21 26 15

110 111

ÚK k.č.2

k.č.32

k.č.33

k.č.1

k.č.24

k.č.18 KD

ELNA

ELNA

P250

BLOK 1

HAV

SJV

k.č.7

SL.2

k.č.2

P250

k.č.20

BLOK.1

k.č.34

ELNA

k.č.1

ELNA

k.č.3

AGLO 3

k.č.8

BL1

k.č.23

ÚK

k.č.10

ELNA

13 12

P250

T191

T291D.V.

P800

12 13

VP

k.č.15T291T191

D.V.

M2

VTK 2

186460

53 44

23 1325

30

43 42

15

17 6 26 11

17 13

11

15

5

86

4 21

512

14

1

57

7

36

18

3

3

1

3

43351

13

423 19 20

14 1

VTK

120

3

1 10 1

1323

3

27

125

20

22

TG4TG7 TG8 TG1 TG2 TG3TG5

117

38 1439

107 113

11

7

5 274

48 6

32 31

13

8

23 24

38

5

5049

26

17

7

2 9 5

1317

11

9 6

918

25

179

28

2

17

20 21

27

1

3

14

22 715 20

11

19

2782

3

06

3

120

4 2

10

3

55

1

9

4

121

102 101 100 58 25

122

1

10

22 19

12

90

5

94 96 98

13 33 14 22 8

81 83

10 7

22

20

31

1

15

30

75

114

1512

103 105

9

132220 26

13

1 23

9

85

11 213 19

8

8

9

80

20

2399 91

14

21

87

14

7

17

19

18 19

16

34

7 41

21

42 50

ELNA.

Kyslikárny

1 3 2

Lešetín.

Autokola obj.9

obj.2 Slév.1

Slév.2 -6kV

Slév.2 -22kVZáv.15-22kV

Zu

šle

ch

. Z15

6kVKS

RHJ26

Aglo.1

Aglo. 3

Řed.

UOD

Ocel.SN

ZPO1

VP

Koks.1TVP

OSO Kov.1

P

800 Šrot.

Koks.21

Koks.2

RHJ22ELO 6kV

R11 R21

CK6kV

CK22kV

RN1 RN2

HAV.

SJVR10 R20

ELO 22kV

HSCC

Kunčice 110kV

2

222222

TG10

88

TG6

6

37

16

1612

17 3

VTK 1

19

Vratimov R110kV

10

76

6

ZPO2-6kV

1

3

Kov.2

2

2

6

10

2034

L3

L4

R22kV

PP 2

T1103

T201

T202

T1101 T1102

R22kV

PP 1R22kV

PP 3

14

10

128

7

810

22

6

15

46

38

2

18

37

1

7

12

3 7

R22kV

Minihuť

R6kV MH

Válc. P1500

R22kV MH

Minihuť R110kV

TM1TM2TM3

L1 L2 L3

L5003

5

Od

Do

Měsíc - rokJméno Podpis

PŘENOSY A ŘAZENÍ NH

76

71

12

1 5 1 2

L14

42

L98SME

T101T101 T102 T102

R1.15 R1.1 HRM2.1a HRM1.1a

ČOV Ostravice ČS Hrabůvka

3 4

ČS Vítk. Aglo R15/1

5kV

k.4 k 59

22kV

M1

7 19 20

19 20

3

17

Poslední úprava :

1316 6

T1

TG9

7

111

4

M3T M3 M3

44

9

17

4

48

2665

9

22

3

12

9

8.8.2001

VálcovnaP 1500

VH SJV

SJV

L5003

Autokola

21

1

20

2

122

1

71831

2011

10811

8

6 24 78

3129

246

1312 181

114 116

11 1 5 12

31 32

78

49

94

Signalization

and measuring

Czech Republic

Realization of secondary regulation of 22 kV

voltage

SAVR Kopřivná

(First controlled small wind source

in the 22 kV network in the Czech Republic)

2 x WTGs Enercon (2.3 MW)

SAVR Kopřivná… 22 kV

Czech Republic

ROMANIA

SAVR Tariverde

400 kV

110 kV

33 kV

22 kV

Set point

Range

Q Q Q

The Action Quantity for Control of Voltage 400 kV is the Reactive Power

SAVR Tariverde

• Control of voltage 400 kV, Control of active power

• New: Control of reactive power on 400 kV

• New: Priority Control - Authority allocation (Local Dispatching center vs TSO Dispatching center)

SAVR Tariverde

SAVR Tariverde

SAVR Rahman

SAVR Rahman

110 kV

33 kV

400 kV

0,4 kV 0,4 kV

SAVR

EGU

SAS

ABB

RTU

EGU

IEC870-5-104

IEC870-5-104

IEC870-5-104

IEC870-5-104

Diagnostic

workplace

FCU Enercon

FCU Enercon

FCU Enercon

PPC Vestas

Local

DSO TSO

MODBUS TCP

SAVR ČEZ Sever - voltage control of 110 kV grid with:

Power plants: Prunéřov 1, Ledvice, Trmice, Unipetrol and Komorany

SAVR ČEZ Morava - voltage control of 110 kV grid with:

Power plants: Detmarovice, Trebovice, Arcelor Mittal Ostrava, Biocel Paskov, Horní Loděnice, Red Hill

SAVR ČEZ Střed - voltage control of 110 kV grid with:

Power plants: Mělník 1, Mělník 2, AGCZ, Plzeňská teplárenská

Reference: Classic Power Plants

Country: CZECH REPUBLIC

SAVR Tariverde - voltage control of 400 kV grid with:(660 MW … installed capacity)

1. WP Fantanele East

2. WP Fantanele West

3. WP Cogealac

Investor: ČEZ Romania

SAVR Rahman - voltage control of 400 kV grid with: (325 MW … installed capacity … so far)

1. WP Alpha N1,2,3

2. WP Ventus

3. WP Cas

4. WP Topolog

5. ……………..

Investor: VERBUND Austria

Reference: WIND PARKS

Country: ROMANIA

FEW COMMENTS:

• The need for regulation of U and Q is and will be obvious. The emerging development of electricity system decentralization is in this respect of particular and determining importance

• The implementation of the SAVR system itself is conditional on the technical level of the relevant part of the electrical system - availability of controllable action members, communication tools, profiles and processes atc.

• Next steps to developing the particular projects should and will be the reflection of developing trends in energy sector: decentralization ..., digitization ..., robotics ..., IoT applications ..., CS ..., island operations, including the virtual power plants, accumulation ...

• Important question is also the motivation of the energy producers i.e. not only legislative requirements (Grid Codes) but also a financial consideration (ancillary services ...)

SAVR


COMPANY – CONTACT DATA:

Jaromír Beran … Director of the Company

Phone: + 420 267 193 436

Mobil: + 420 603 229 161

e-mail: [email protected]

www.egu-prg.cz

Petr Čech … Head of the Department:

Control of Power Network Parameters and Control Systems

Phone: + 420 267 193 574

Mobil: + 420 603 247 976

e-mail: [email protected]

www.egu-prg.cz


EGÚ Praha Engineering, a. s.; Podnikatelská 539, 190 11 Praha 9 - Běchovice; CZECH REPUBLIC




http://www.egu-prg.cz/









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