HVDC Network Studies

Advanced analysis of High Voltage Direct Current transmission systems for optimal power network integration

What are HVDC Network Studies?

High Voltage Direct Current (HVDC) network studies analyze the performance, stability, and integration of HVDC transmission systems within AC power networks. These studies are essential for long-distance power transmission, submarine cables, and asynchronous grid interconnections.

HVDC systems offer advantages including lower transmission losses over long distances, enhanced system stability, and the ability to connect asynchronous AC systems with different frequencies or phases.

Types of HVDC Systems

LCC

Traditional thyristor-based technology for high-power applications.

VSC

Modern IGBT-based technology offering enhanced controllability.

MMC

Advanced VSC technology for improved efficiency and power quality.

Hybrid HVDC

Combination of LCC and VSC technologies for optimized performance.

Benefits of HVDC Network Studies

System Planning

Optimal placement and sizing of HVDC links for maximum benefit.

Stability Analysis

Assessment of AC-DC system interactions and stability margins.

Power Quality

Evaluation of harmonics, flicker, and voltage variations.

Control Coordination

Design of control strategies for seamless AC-DC operation.

Economic Analysis

Cost-benefit analysis of HVDC versus AC transmission alternatives.

Grid Code Compliance

Ensuring adherence to transmission system operator requirements.

How We Perform HVDC Network Studies

1

Data Collection

Gather system parameters, HVDC specifications, and operational requirements.

2

System Modeling

Develop detailed AC-DC system models using PSCAD/EMTDC, PSS®E, or PowerFactory.

3

Analysis & Simulations

Conduct steady-state analysis, dynamic studies, and detailed EMT simulations for comprehensive evaluation.

4

Reporting

Comprehensive technical reports with findings and recommendations.

HVDC Applications

  • Long-distance bulk power transmission
  • Submarine and underground cable systems
  • Asynchronous grid interconnections
  • Renewable energy integration
  • Urban power supply reinforcement
  • Multi-terminal DC networks

Study Deliverables

  • HVDC system design specifications
  • AC-DC interaction analysis
  • Control system design recommendations
  • Power quality assessment reports
  • Economic feasibility analysis
  • Grid code compliance verification

Key Technologies

Converter Technologies

LCC, VSC, MMC

Control Systems

Vector Control, Direct Control

Protection

DC Line Protection, Converter Protection

Communication

SCADA, IEC 61850

Standards for HVDC Network Studies

IEC 62747

Terminology for voltage-sourced converters (VSC) for high-voltage direct current (HVDC) systems.

IEEE 1204

Guide for Planning DC Links Terminating at AC Locations Having Low Short-Circuit Capacities.

CIGRE TB 269

Criteria for HVDC connections to weak AC systems.

IEC 61803

Determination of power losses in high-voltage direct current (HVDC) converter stations.