hvdc international workshop

HVDC INTERNATIONAL WORKSHOP

OPERATIONAL EXPERIENCE AND TECHNOLOGICAL

DEVELOPMENT FOR APPLICATION WORLDWIDE

OLIVIER DESPOUYS

MARCH 30TH, 2017 - VENICE

CONVERTER INTEROPERABILITY IN

MULTI-VENDOR HVDC-VSC SYSTEMS

The Best Paths project

A European R&D project

Description of Best Paths DEMO #2

Interoperability in multivendor HVDC-VSC systems

Interim results in Best Paths DEMO #2

Offline simulation

Ongoing work in Best Paths DEMO #2

Real-time simulation

Conclusions

Converter interoperability in multi-vendor HVDC-VSC systems – Olivier DESPOUYS (RTE)

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Agenda

A large European R&D project

« BEyond State-of-the-art Technologies for Power AC corridors and multi-Terminal HVDC Systems »

EU funded R&D project (FP7)

Oct. 2014 - Sept. 2018 (4 years)

More information available on: http://www.bestpaths-project.eu/


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European contributors…

… taking part in 5 demonstrators



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Interim results in Best Paths DEMO #2

Offline simulation



Conclusions


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Targets and scope

Assessment of interoperability performed on a wide variety of situations andconditions

Maximize interoperability for multivendor HVDC systems based on recent VSCconverters from world-leading vendors

Recommendations for standardization bodies and stakeholders for future DCG

Demo #2: Interoperability in multi-vendor VSC-based HVDC systems



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TSOs

World-class vendors

Academics

Coord.:RTE

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A two-stage process

Task 4.1: Network topologies & functional specifications

Task 4.2: Adaptation & validation of VSC EMTP models

Task 4.3: EMTP models for network topologies

Task 4.4: EMTP simulations: converters & topologies

Task 4.5: Recommendations for interface specifications

Offline EMT simulation with detailed converter models (EMTP-RV)


Public deliverable D4.3


Task 9.1: Specifications of the improved hardware HVDC Ctl

Task 9.2: Physical implementation in replicas

Task 9.3: Adaptation / extension of RTE’s RT facility

Task 9.4: Installation / commissioning of replicas

Task 9.5: Test and demonstration of the coupled replicas

Task 9.6: Final recommendations Public deliverable D9.3

Real-time simulation (Hypersim) with converter control cubicles





Achievements and interim results in Best Paths DEMO #2

Offline simulation



Conclusions


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Offline simulations

Partners in the first period

Achievements and interim results

Selection of DC topologies

Wide range of situations to test IOP

Building blocks for future DC grids

DC

AC

AC

DC

DC

V1 V2

ACAC

DC

AC

AC

DC

DC

V1 V2

DC

ACV3

AC

AC

AC

DC

AC

AC

DC

DC

V1 V2

DC

AC

AC

DC

V3 V4

AC

AC

AC

ACDC

AC

V5

DC

AC

AC

DC

DC

V1 V2

DC

AC

AC

DC

V3 V4

AC

AC

AC

AC

AC

DC

AC

AC

DC

DC

V1 V2

DC

ACV3

AC

AC

AC

Functional specifications for the DC network operations

Description of the DC topologies and AC network conditions

Specifications for the converters with validation tests and acceptance criteria

Overall organisation with Master Control / Protection System


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Offline simulations (continued)

Adaptation of the commercial VSC designs and supply of offline simulation models

3 realistic converter models provided by ABB, GE and SIEMENS

Meet the requirements from specifications

Various versions of detailed models

Black-boxed models

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Scores for validation tests

Validation of vendor models

39 validation tests with associated acceptancecriteria

Excellent confidence in the quality of the 3 models(tested for most current operation)

Compliance of converter models to thespecifications was assessed



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Development of offline simulation test networks

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Situations Scenarii

Trade-off between the widest coverage and a pragmatic approach

Parallel (multi-processor / multi-threaded) and automated simulation withEMTP-RV + Parametric Studio



When IOP assessment could be performed:

o Existence of IOP issues assessed for the first timeo 399 situations, 1099 scenarios, 160 IOP issues detected (15%)o 8 types of IOP issues identified up to now (so far)

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Simulation of the multiterminal configurations to address interoperability issues

Definition of IOP issue by comparing validated common mono-vendorbehaviors with multi-vendor behavior

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Expected fromspecifications B

A C

Simulations compatible with

all vendors

IOP assessment limited tosituations and simulationsfor which all involvedconverter models hadcommon (and expected)behavior


Illustration of successful simulations



Topology 5 layout and initial operating point

Converter 1 2 3 4 5

Vendor A A B B C

Control

mode Pac / Uac Pac / Uac

Power-

Voltage

droop / Uac

Power-

Voltage

droop / Uac

Power-

Voltage

droop / Uac


Illustration of an IOP issue



Oscillatory behavior observed on Topology 1

DC

AC

AC

DC

DC

V1 V2

ACAC

Converter 1 2

Vendor A B

Control mode

Pac / Uac Vdc / Uac

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Deliverable D4.3 “First recommendations to enhance interoperability in HVDC-VSC

multi-vendor schemes”

Factors which favored interoperability

Recommendations for TSOs

Recommendations for vendors

Recommendations for academia

Suggested directions for grid codes and standardisation bodies

Pending issues

Implementation of some recommendations for real-time simulation

Public deliverable

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Offline simulation



Conclusions


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Real-time simulation with control cubicles

Partners in second period (real-time simulation)

SIEMENS will not deliver control cubicles

Deliverable D9.1 “Specification of the improved hardware HVDC control system”

Recommendations related to specifications were implemented

Improvements wrt previous specifications include:

o Definition of a new controls (disturbed DC voltage)o Definition of operational limitso Definition of capability marginso New requirements for the DC side of the converters (DC Fault Ride-Through

capability etc.)o New operational parameters / range of operation

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Ongoing work in DEMO #2

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Real-time simulation with control cubicles (continued)

Physical implementation of replicas

Implementation based on improved specifications

Ongoing clarifications between RTE and the vendors regarding the interfaceswith the HYPERSIM real-time simulator

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Adaptation / extension of RTE’s real-time facility

Location: Paris – La Défense

Implementation of the Master Control and Protection System

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Real-time architecture to test interoperability

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Offline simulation



Conclusions


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Conclusion

Best Paths DEMO #2 is the first project to undertake systematic investigation

of interoperability issues in multi-vendor VSC-HVDC systems

For the first time, three world class leaders in HVDC take part into those

investigations (except real-time simulation for SIEMENS), in addition to TSOs

& academics

Step-by-step process (from simple to more complex situations, from offline to

RT simulation) to study a wide range of situations

IOP issues were defined, and their existence was proven using offline

simulation. Categories of IOP were defined

More detailed results expected in upcoming real-time simulations

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DEMO #2 – the final word

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Thank you for your attention!

Any question?


Time to open the discussion…

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Real-time architecture to test interoperability (continued)

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