Transmission Capacity Release
Increase existing transmission capacity without having to build new lines.
N-1 contingency planning and load flow analysis can reduce the operational capacity of certain transmission lines, which leads to overbuilding the transmission system and higher costs. Until now, there wasn’t a good solution for this problem. However, energy storage can automatically inject power to support grid stability during contingency events. This enables operators to increase the operational capacity of existing transmission lines, without having to build another tower or line.
Network Peak Load Relief
Right-size your network investment to meet changing load growth patterns.
Traditional poles-and-wires projects are major capital investments, traditionally oversized and underutilized initially in order to accommodate load forecasts years into the future. In fact, the top 10% of peak demand typically occurs in less than 1% of the year and as a result, T&D assets are only ~55% utilized. Fluence’s energy storage systems enable investments to be scaled incrementally over time, delivering the right amount of load relief each year. When a new line is finally commissioned, existing energy storage arrays can be re-sited to support other load pockets as well.
Sidestep line congestion with localized energy reserves.
During peak demand, transmission and distribution capacity can become a bottleneck in the network forcing system operators to dispatch expensive local generation. Sidestep congestion and inject power downstream of transmission constraints with energy storage. Energy storage can charge during off-peak hours and discharge to serve congested load pockets during times of peak demand.
Network Black Start
Secure and balanced restart of the network.
The goal is to build networks that never go down. But if they do, energy storage can stand at the ready to restart critical generators, power plants, or get the network back up as soon as possible after an outage. Furthermore, energy storage can serve as a fast acting load resource to ensure supply and demand are managed in lockstep. This balancing capability ensures a stable network is maintained throughout the whole process.
Distribution System Reliability
Increase the operating efficiency of the system and improve stability during disturbances.
The distribution network is increasingly taxed by new sources of load (such as electric vehicles) and distributed generation. Battery storage can absorb intermittent local generation and insulate the grid from sudden spikes in local load, easing the strain on distribution infrastructure. Energy storage can manage reactive power output, typically concurrently and independently from real power. Such reactive power can be used to provide services which maintain grid voltage. This is a critical localized service that protects equipment, maintains power quality, and reduces transmission losses.
Network response in an instant.
System operators have relied on large synchronized generators to provide inertia and frequency response to the network. It’s embedded deep into the physics of running the network and isn’t missed until it is gone. As renewable generation reduces the amount of generators synchronized to the network, there is a real concern around network control and response. Fortunately, energy storage can provide frequency response for system reliability much more efficiently, at a lower cost, and with substantially reduced emissions than thermal generation.