Category: GE

Today’s Environment

Globally the utility environment is becoming more complex and utilities are

having to manage new challenges such as:

• Increasing demand for electricity

• Connection of remote generation

• Growth of distant offshore wind

• Integration of variable renewable generation

• Need for security of supply

• Reduce carbon footprint

• Land costs becoming more expensive

• New right-of-way access permits increasing difficult to obtain

The only choice for many utilities is to restructure their grid systems to

manage these challenges. Utilities are looking for cost effective solutions to

transfer power and to improve the quality, stability and reliability of the grid

which will anticipate their needs for the next 20 to 50 years.

Multi-terminal HVDC systems and DC Grids

Challenge

Interconnect three or more regions and power systems to facilitate power

exchange and trading, and to provide added system security, efficiency and

flexibility to the benefit of the overall grid.

GE’s solution

GE’s HVDC enables the interconnection of multiple HVDC converters

providing controllability of power flow and facilitates the future expansion

into HVDC grids.

Benefits include

• Better management and integration of renewable energy generation

• Increases grid security

• Enables cross border energy trading

• Provides more efficient network by reducing reliance on thermal generation

GridNode DER Management

DISPATCH MODES

• Voltage

• Reactive Power

• Active Power

• Power Factor

CONTROL CAPABILITIES

• Equitable Dispatch

• Ramp Rate Control

• Volt-Var Control

• Feeder Controls

Solutions and Services

• Engineering and consulting services

• Controls and HMI development

• Protection, control, automation, and communications products

• Testing including Hardware-in-the-loop (HIL)

• Integration and on-site services

• Cyber security solutions

• Maintenance and support

Communications

• IEC 61850 Ed.1 and Ed.2

• C37.118 and IEC61850-90-5

• IEC 60870-5-101/104

• DNP3 and Modbus RTU/TCP

• SNMP Client

• IEEE 1588. Irig-B and NTP

• IEC 6070-5-103

• OPC UA, DA & AE

• EGD

• MQTT

• IEEE 2030.5 *coming soon

GridNode DER Management Solution Architecture

GE Vernova’s GridNode DER Management solution monitors and controls renewable

energy assets from the point of interconnection (POI). Capabilities include being able

to receive a set-point (P,Q,V,or PF) for the POI and control the connected DER assets

to comply by dispatching them equitably, taking into account the network parameters.

Energy trends of increasing renewable penetration and decentralization of generation

assets create new industry challenges. These challenges include integration,

coordination, and maximizing return-on-investment (ROI) on distributed energy

resources (DERs), while providing network reliability and flexibility.

GE Vernova’s GridNode DER Management solution enables utilities and developers

to easily integrate renewable energy resources.

The GridNode DER Management solution includes the control and automation functions

to manage Active and Reactive Power, Power Factor, and Voltage at the point of

interconnection for your Renewable Energy Resources.

Key Benefits

• Improve Reliability by exploiting renewable generation capabilities in order to provide

optimal support to the grid

• Ease of deployment by utilizing GE Vernova’s configurable GridNode DER

Management Solution

• Increased revenue through equitable dispatch across renewable generation assets

and providing the capability to provide ancillary services to the grid such as Reactive

Power support

• Energy cost reduction through a solution that can efficiently manage, optimize and

integrate low cost renewable onto your grid

• Life extension by reducing the number of operations on distribution level voltage

transformers and capacitor banks through the optimal and flexible dispatch of your

renewable generation assets

Solutions and Services

• Engineering and Consulting Services

• Controls and HMI Development

• GridNode Microgrid Control and Automation Functions

• Protection, Control, Automation, and Communications Products

• Testing incl. Hardware-In-the-Loop Testing

• Integration and On-site Services

• Cyber Security Solutions

• Maintenance and Support

GridNode Control Functions

• Planned Islanding

• Seamless Unplanned Islanding and Fast Load Shedding

• Re-synchronization

• Blackstart

• Power Exchange with the grid

• Load Sharing

• Voltage and Reactive Power Management

• Power Factor Management

• Frequency Control

• Capacity Management

• Load Forecasting

GridNode Optimization

• Optimal DER Dispatch

• State of Charge Management

• Forecasting

• PV Smoothing

Market Interaction

• Ancillary Services Enablement

• IEEE 2030.5 for advanced utility and aggregator integration

GE Vernova provides a full spectrum of products and services that can contribute

to achieving the energy goals of our customers. GE Vernova designs, manufactures,

and supplies electrical protection and automation products, microgrid control

systems, network switches, gateways, and DER assets for this type of solution which

guarantees fast and low-cost deployment. GE Vernova’s GridNode Microgrid Solution

includes control and automation features such as real-time operation management,

transition management, dispatch control and optimization, operations planning, market

participation and advanced reporting and analytics.

GridNode Microgrid Controller – Hardware

The GridNode Microgrid Controller is the hardware platform

of choice for GE Vernova Grid Automation Microgrid solutions

for providing a trusted, powerful, and expandable platform.

GE Vernova’s GridNode software completes the all-in-one solution,

which includes:

• Configurator: used for programming HMI screens and

configuring communications.

• GridNode Functions: provides designed, developed, and

validated application function blocks that are flexible and

configurable based on the customers network.

• Viewer: provides a GUI for controlling and monitoring substation

systems from a station-level computer.

• Concentrator: runs on the GE Vernova Power Gateway (GPG)

and is the communications driver that gathers data from IEDs

and distributes data to different applications.

• Logic Box: includes the latest generation of IEC 61131-3

programming tools to develop complex substation logic.

Overload Curves

The curves can take one of three formats: standard, custom, or voltage dependent.

For all curve styles, the 469 retains thermal memory in a thermal capacity

used register which is updated every 0.1 second. The overload pickup determines

where the running overload curve begins.

The 469 standard overload curves are of standard shape with a multiplier value of

1 to 15.

The voltage dependent overload curves are used in high inertia load applications,

where motor acceleration time can actually exceed the safe stall time and motor

thermal limits. During motor acceleration, the programmed thermal overload curve

is dynamically adjusted with reference to the system voltage level. The selection

of the overload curve type and the shape is based on motor thermal limit curves

provided by motor vendor.

Complete integrated protection and

management of medium and large motors

The MultilinTM 469 Motor Protection System, a member of the SR family of relays,

provides protection, control, simplified configuration and advanced communications in

a cost effective industry leading draw-out construction. Designed for medium voltage

motors, the 469 delivers advanced protection with customizable overload curves and

single CT differential protection for added flexibility. The 469 also provides simplified

configuration using the Motor Settings Auto-Configurator, providing a quick and easy

set-up of motor parameters. Coupled with advanced protection and diagnostics, the 469

provides users the flexibility of multiple communication protocols allowing integration

into new and existing control networks.

Protection and Control

The 469 is a digital motor protection system designed to protect and manage

medium and large motors and driven equipment. It contains a full range of

selectively enabled, self contained protection and control elements as

detailed in the Functional Block Diagram and Features table.

Motor Thermal Model

The primary protective function of the 469 is the thermal model with six key elements:

• Overload Curves

• Unbalance Biasing

• Hot/Cold Safe Stall Ratio

• Motor Cooling Time Constants

• Start Inhibit and Emergency Restart

• RTD Biasing

The synchronism function (with the presence of line and bar volt

age) can be supervised by two undervoltage units that permit

the synchronism function when both voltages are above the set

value.

Additionally, the relay contains dead line-dead bus (DLDB), dead

line-live bus (DLLB) and live line dead bus (LLDB) units, with the

ability to select any combination of them through independent

settings.

The basic relay, MLJ1000. and the RS-485 communications

model, MLJ1005. are mounted in a 2″ module that is compatible

with the MID industrial systems.

They can also be provided in an individual 1/8 rack. The relays

with additional communications via RS232 and plastic or glass

fiber optics, models MLJ1006 and MLJ1007. come with an addition

al 2″ card. The set can be mounted in either a 4″ module for

MID compatibility or a 1/4 rack case to be used as a stand alone

relay.

Functions

• programmable synchronism verification (voltage, phase and

frequency)

• two operating modes: continuous and manual

• dead line-dead bus (DLDB), dead line-live bus (DLLB) and live line

dead bus (LLDB) units

• real time measuring of line and bus voltages, voltage difference,

phase difference and slip

• registering of the last close permitted

• visual indication of the line and bus status (live/dead)

• configurable auxiliary outputs

• local interface with push buttons and display

• RS485. RS232 and fiber optics communications

• self test functions

• compatible with MID industrial systems

Man Machine Interface

Keypad

Composed of three buttons with the symbols +, -, and ENTER.

Permits performing the following functions:

• view measurements

• view relay status

• view or change settings

• indicators and inputs testing

Description

The MLJ is a digital synchronism check relay that measures bus

and line voltages, checking:

• voltage differences

• frequency slip

• phase angle between both voltages

The main applications of the MLJ are:

• connection of a generator to the network

• reestablishing the connection between two parts of the

network

• manual closing of breakers

The relay sends a closing output to the breaker when all of the

values fall within the set limits and maintain these values for a

period of time which has been set by the user. If any of the

condi tions are not met, the relay will provide a close condition

fault signal.

The relay has two operational modes:

• a continuous mode in which itconstantly checks the synchro

nism

• the manual mode is activated when voltage is applied to a

manual digital input, initiating the synchronism supervision

when voltage is applied by another check starting digital

input