BESS CAN BE USED AT BOTH THE WHOLESALE AND DISTRIBUTION SEGMENTS. EACH LARGE LOAD HAS ITS OWN ENERGY GENERATION, TRANSMISSION & INTERCONNECTION, AND DISTRIBUTION ISSUES. As of EPA2005, NERC Standards for Reliability, Resilience, and Cybersecurity are enforceable by FERC for all participants of the BES (bulk electric system). There is an issue whether behind the fence generation and nongrid distribution are subject to these standards except for LMP pricing, but this post assumes they will eventually be made explicitly so because of their impact on interstate commerce and impact on downstream grid reliability. Today’s large commercial facilities, both base and variable loads, require increased control of power reliability, sustainability, and costs. Driving factors include more frequent severe weather power outages and carbon emission concerns. Battery energy storage systems (BESS) classically had been used to enable integration of renewables such as solar which are intermittent but which may not be available on site or adjacent through radials, to smooth peaks, to supply independent auxiliary power, and to reduce reliance on fossil-fuel backup. NATURAL GAS & FUTURE SMRs. Upstream, where renewables and grid access are limited, many are currently deploying robust, efficient, and flexible natural gas-based production today while exploring small modular reactors (SMRs) as a long-dated solution for future low-carbon baseload reliability, but developers may not be able to wait for SMRs. RATE SAVINGS AND SPOT PRICE MANAGEMENT; UTILITY OBLIGATION TO SERVE. As an installation upstream of a distribution system, BESS stored energy can be leveraged not only as an energy source during power outages, and can also help offset high electricity rates and manage power availability fluctuations. Such a strategy avoids penalties during peak power consumption while increasing power resilience and clean energy consumption. For instance, high Time of Use (TOU) utility rates can underscore the need to offset high energy costs. When utility rates are high, a facility can access power that was stored when rates were low. From a utility/obligation to serve perspective, energy storage via a BESS installed on a power grid enables quick responses to peaks in energy demand. ISOLATION & USING BESS AS A BACKUP POWER SOURCE. Meeting isolation requirements for inverter-based standby power applications. The BESS and loads need proper isolation from other sources to serve as a backup power source. Additionally, rescheduling of assets/fleet if the facility is tied to the grid is necessary; understanding that level of charge/runtime you will get from a BESS is critical considering that they cannot just be refueled to get added runtime. INSTALLATION. Considerations for having UPS (uninterruptible power supply) downstream of the BESS. Architecturally, this is doable by having the inverter feed the upstream of the UPS just like a utility source. That said any specific interactions between the UPS and inverter would need to be reviewed by the UPS manufacturer based on the specs of the specific inverter. (This is beyond my skill set.) SOURCE ISOLATION SWITCH A SOLUTION TO RESILIENCE: Siemens says: Every facility that has used a BESS as a backup power source has required a custom, multi-device, isolation solution…until now. Recently, Underwriters Laboratories issued its provisional UL 3008 guidance that defines requirements for source isolation switches. ASCO Power Technologies is the first manufacturer to offer one. Designed to meet UL 3008 requirements, its SourcePacT™ Source Isolation Switch provides engineers, contractors, and facilities with a single-device solution that streamlines design, deployment, and use of inverter-controlled backup power. SourcePacT (Isolation Switch) serves to a BESS the same as a Transfer Switch to a generator. Adding this one switch to a BESS-equipped power system enables facilities to increase resilience, optimize energy costs, and enhance sustainability. It’s a simple addition that can maximize the value of every BESS dollar. DISTRIBUTION ISSUES & DISCLOSING TRANSFORMER ISSUES: Siemens points out that behind-the-meter distribution DERs (Distributed Energy Resources) are growing at an exponential rate. However, traditional distribution grids are not designed to handle the two-way power flow and rise in electricity demand. Distribution utilities are seeing more frequent overloads and overvoltages in transformers, feeders, and beyond – significantly reducing the lifespan of the equipment. Siemens says in many cases, it only takes two EVs to be connected to the same transformer for that asset to either blow out or reduce its life by 90%! With the electrification of everything and the exponential growth of DERs that can be stored for peak shaving or sold as energy to the RTO or utility in the RTM or DAM, utilities urgently need to gain visibility into which transformers are having issues and where there are clusters of DERs making the problem worse. Siemens says using load disaggregation algorithms, “DER Insights” can detect the presence of behind-the-meter (BTM) PV, EV, and BESS at the distribution transformer level and aggregated up to the circuit (feeder) and substation transformer. Understand and visualize the DER behavior with estimated 15-min historical power profiles, peaks and average energy values.

ASCO Power Technologies amplía gama de su solución SourcePacT itusers.today/asco-power-tec… @festivatweet @ReyYacolca @viejosebas2000