Communication Requirements for a Hybrid VSC Based HVDC/AC Transmission Networks State Estimation

Abstract

The communication infrastructure of the modern Supervisory, Control and Data Acquisition (SCADA) system continues to enlarge, as hybrid High Voltage Direct Current (HVDC)/Alternating Current (AC) networks emerge. A centralized SCADA faces challenges to meet the time requirements of the two different power networks topologies, such as employing the SCADA toolboxes for both grids. This paper presents the modern communication infrastructure and the time requirements of a centralized SCADA for hybrid HVDC/AC network. In addition, a case study of a complete cycle for a unified Weighted Least Squares (WLS) state estimation is tested on a hybrid HVDC/AC transmission network, based on Voltage Source Converter (VSC). The cycle estimates the elapsed times from the sensors up to the SCADA side, including the data acquisition and the WLS processing times. The case study is carried out on the Cigre B4 DC test case network with 43 virtual Remote Terminal Unit (RTU)s installed and 10 data concentrators, all connected through a fiber-based communication network. It is concluded that the time requirements can be fulfilled for a hybrid HVDC/AC network.

Virtual PLC in Industrial Edge Platform: Performance Evaluation of Supervision and Control Communication

“…Since the PLCs are placed at the center of the automation stack (also known as CIM automation pyramid [7]), they have two types of data exchange: i) they are connected to other machines, Supervisory Control and Data Acquisition Systems (SCADA) [8], and controllers for the supervision and coordination of the production line; ii) and they are connected 2 > REPLACE THIS LINE WITH YOUR MANUSCRIPT ID NUMBER (DOUBLE-CLICK HERE TO EDIT) < to sensors and actuators in order to perform their own control actions. Both aspects have been well investigated in literature [9] with respect to traditional PLCs, but a general lack of research works on containerized virtual PLCs has been noted.…”

An Architecture for a Multi-Vendor VSC-HVDC Station With Partially Open Control and Protection

“…However, one new technical challenge on the latency for the SCADA system appears since several HVDC stations will have to be considered in a multi-terminal arrangement. These latencies are acceptable and have been analyzed in detail in [60].…”