cigre study committee b5 colloquium, calgary 14-16 september 2005 areva t&d automation...
TRANSCRIPT
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
AREVA T&D Automation
Protection & Control of Series Compensated
Networks
Z Q Bo
PART 3 Non Distance Protection
PART 4 Dynamic Tests
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Non Distance Protection
PART 3
Current differential & Directional Comparison relays are little affected by series compensation
Potential a problem for Current Differential relay for long UHV lines where charging current is too high
Directional Comparison might be a better choice in such case
Cross Differential protection relay for double circuit lines is not effected by series compensation and does not require communication link
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Comparison of electric quantities between the double lines
Similar no fault, or external fault Difference internal fault
Cross Differential Relay
Relay
CT
CT
VT
VT
Relay
CT
CT
VT
VT
Source
Source
Load
B1S B1R
B2S B2R
Line 1
Line 2
RS RR
Bus S Bus R
F
Combination of two types of cross differential relay
elements:
Current-balanced relay (CBR) Directional transverse differential relay (DTR)
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Performance of Cross differential relayTests conducted at China EPRI show
» The relay is able to offer fast response for all fault types within the instant protected zone, which is about 90% of the total line length.
» The relay is able to successively trip for all types of remote in zone fault outside the instant protected zone after remote CB operates.
» The relay is able to clear high resistance fault for EHV long lines both instantly and successively.
» The relay is able to trip the faulted phase only for evolving faults on both of the two lines.
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Super-imposed Component based Protection
Surge Impedance Relay Noise Generated Protection Boundary Protection AREVA – Tsinghua Research collaboration
PART 3New relay principles
based on non-power frequency measurement
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Example 1 Noise Generated Protection
CVT F1
F2
TS1
TS2
TR1
TR2
CS
signallimiter
Anti-aliasing A/D
operateY1
RestraintY2
Filter I
Filter II
Y1Y2
leveldetector
Relay
Ratio
Analogue
Digital
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Example 1 Frequency Response of Noise Generated Protection Scheme
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Example 2 Boundary Protection Technique
F1 F2
CS
AnalogInterface
Anti-aliasing A/D
Spectralenergy
extraction
Multichannel
filter
IopIre
leveldetector
Relay
Ratio
Analogue
Digital
I2I0
I1I1
CT
Ia
IcIb
Im1
Im2
If1
If2
Iop
Ire
operate
Restraint
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Example 2 Boundary Protection - Attenuation of Busbar Capacitance to HF Signals
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
Dynamic tests
Most effective means for relay development and assessment of relay performance
Critic fault positions and conditions RTDS tests for relay development Analogue & RTDS tests for relay approval AREVA – China EPRI development
collaboration
PART 4
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
International Research & Development Collaboration
TsinghuaUniversity
FundamentalResearch
RelayImplementation
DynamicTests
International Research & Development Collaboration
EPRIChina
Areva T&DEAI
CollaborationCONCEPTNEW
PRODUCTSCollaboration PROVE
Top Researcher Leading manufacturer Welknown test authority
CIGRE Study Committee B5 Colloquium, Calgary 14-16 September 2005
End of Discussion
Thanks !