Controller System

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GE's series of Multilin P30 PDCs and PMU devices leverage the latest advances in synchrophasor and computing technologies available for the power industry to enable synchrophasor based wide area monitoring applications.

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Key Benefits

• Reduce deployment and operation cost of wide area 
  monitoring systems integrating more Phasor Measurement Units (PMUs) per PDC

• Simplify analysis of power system events through fast and easy access to time synchronized phasor data archives

• Implement NERC-PRC-002-2 (draft) compliant dynamic disturbance recording (DDR) systems

• Integrate P30 PDC into NERC-CIP compliant systems using the built-in security features

• Enable control system wide area monitoring applications to reveal dynamics of the power grid though low latency time aligned synchrophasor signals

• Customize wide area monitoring systems with the optional Multilin P30 applications module without the costs associated with additional hardware

 

Applications

• Collection, aggregation, archiving of synchrophasor time aligned data within the Substation for enhanced post event analysis.

• Continuous recording and reporting of synchrophasor data through up to eight C37.118 clients for wide area monitoring applications

• Deployment of NERC-PRC-002-2 compliant Dynamic Disturbance Recording systems

• Visualization of live or recorded synchronized phasor data at substation, multiple substations and regional control centers

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Overview

Monitoring of electrical grid infrastructure is a critical task carried out continuously by system operators to guarantee safe and reliable operations. Traditional SCADA systems give operators a view of the system's operating conditions with a typical latency in the range of seconds and minutes.

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The relative low measurement frequency and low speed communications combined with the time required to execute analysis programs do not allow SCADA systems to handle system emergency operations in real time. Decisions are made based on static power system models where a trade-off with accuracy is generally needed.

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Communication and computing technologies available today allow monitoring functions with sub cycle resolution for power systems over large geographical areas. The faster and higher resolution measurements introduced with synchrophasor technologies, also known as dynamic monitoring capabilities, enable wide area monitoring at the system level based on accurate and precise data at high-speed data rates with extremely low latency, less than 200ms.

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When applied to wide area applications, typically executed at the operation center level, synchrophasors enable operators to optimize system availability, reliability and stability analysis and operations. Phasor Data Concentrators (PDCs) and the Phasor Measurement Units (PMUs), that supply control centers with phasor data, are key components of synchrophasor based wide area monitoring systems.

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Wide Area Monitoring​

Enabling Synchrophasor Based Wide Area Monitoring 

Reduce synchrophasor based wide area monitoring deployment and maintenance cost by integrating more PMUs per PDC, while being compliant to NERC-PRC-002-2 dynamic disturbance recording requirements: 

• Integration of Phasor Measurement Units (PMUs)

• Seamless Interface to Super PDCs

• Integrate any C37.118 compliant device

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Connectivity

The Multilin P30 Phasor Data Concentrator is a modular, substation rated, high performance device capable of collecting, processing, recording and archiving C37.118 compliant synchrophasor data. The Multilin P30 supports up to forty PMU or PDC inputs and up to eight user configurable channels for transmission of synchrophasor data to clients such as other PDCs, Super PDCs and/or EnerVista Synchrophasor Viewer.

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High Performance PDC
Multilin P30 Phasor Data Concentrator product architecture

High Performance PDC 

The primary function of the Multilin P30 PDC is to provide enhanced visibility of the electrical power grid. The Multilin P30 PDC data collector module communicates with up to forty PMUs or other PDCs to acquire and time-align synchrophasor data. 

The Multilin P30 processor module structures output datasets from available data, interpolates, filters and decimates data as required.

The Multilin P30 PDC can connect to up to eight output streams which can be individually configured to ensure clients such as other PDCs, Super PDCs, visualization devices, external historians and other external applications receive accurate and precise data at rates previously impossible to obtain from traditional SCADA systems. 

Easy Expansion and Customization of Multilin P30 PDC 
The Multilin P30 Applications Processor option is available to users that need to integrate custom applications into their synchrophasor monitoring systems.

The Multilin P30 Applications Processor is equipped with a Windows® operating system that allows installation of user's preferred applications including development tool kits.

The Multilin P30 Applications Processor can reduce DDR systems deployment cost leveraging the infrastructure built in to the Multilin P30 PDC to expand and customize the PDC platform while maintaining the system reliability associated with the Multilin P30 substation rated platform.

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Recording and Archiving

PRC-002-2 Dynamic Disturbance Recording (DDR)

PRC-002 is a standard under development that will define the requirements for recording and reporting Sequence Of Events (SOE) data, Fault Recording (FR) data, and Dynamic Disturbance Recording (DDR). The purpose of the standard is to facilitate analysis of disturbances.

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FR and SOE are features commonly available today in protection relays and SCADA equipment.

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The third type of recording defined in the PRC-002-2 standard is DDR. Large interconnected systems can have inter-area responses to each other resulting in slow oscillating load swings. These disturbances are characterized by oscillating power swings that can have frequencies in the neighborhood of 0.1 to 4Hz, and duration in the range of a few seconds to minutes or hours.

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A dynamic disturbance recorder is a device cable of recording incidents that portray power system behavior during dynamic events such as low frequency (0.1Hz - 4Hz) oscillations and abnormal frequency or voltage excursions.

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The advanced high capacity disturbance and event recording features available in the Multilin P30 Substation Phasor Data Concentrator support the requirements of the PRC-002-2 standard and can significantly reduce the time needed for analysis and reporting of disturbance analysis and regulatory reports.

Multilin P30 Built-in Historian Capabilities

A typical GE substation Dynamic Disturbance Recording (DDR) system comprises of several PMUs reporting synchrophasor data at various different rates from 1 to 120 frames per second to a Multilin P30 PDC. Each of GE's Multilin PMUs may include 1 to 14 sets of phasor values (Multilin N60). Below are some typical examples of different types of PMUs with various combinations of phasor, analog and digital parameters. Large volumes of data generated by a DDR system requires a fast and reliable archiving method to guarantee data integrity for future analysis.

The Multilin P30 PDC historian processor is a high capacity platform capable of recording up to 100.000 values per second.

Local Archiving

Distributed synchrophasor data storage through local archiving is recommended under the following two scenarios:

• 1. Upstream communication channels don't support the bandwidth to report all data monitored by the PDC.

• 2. Communication channels supports transmission of all data monitored by the Multilin P30 PDC. Archiving at the Substation level is 
      introduced to increase system reliability and preserve monitored data in case of upstream channel communications failure.

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