Financial Screening and Developer Models for a Stand-Alone Battery Energy Storage System

Over the past twenty years, the capital costs of wind and solar generation equipment have decreased dramatically, but the intermittence of output remains a major challenge. A battery energy storage system offers one possible solution to increasing power system flexibility. Batteries have already proven to be a commercially viable energy storage technology, with lithium-ion batteries being instrumental in a wave of BESS deployments for small-scale, behind-the-meter installations and large-scale, grid-level deployments. The financial viability of a battery energy storage project for renewable integration will depend on the cost-benefit analysis of the intended application. The government of Pakistan has taken initiatives to advance the development of BESS in the country. The Alternative Energy Development Board (AEDB) recognized storage technologies as alternative technologies and included them in the Alternative Renewable Energy (ARE) Policy 2019. The policy allows innovative technologies to be developed on a cost-plus basis to diversify and lower the cost of Pakistan's energy mix. The National Electric Power Regulatory Authority (NEPRA) has also inquired about cheaper options than open cycle gas turbines to mitigate the intermittency risk of renewable energy. The National Transmission and Despatch Company (NTDC) has procured advanced modeling software, including PLEXOS, to improve the capacities of its Power System Planning (PSP) team. The use of PLEXOS will allow NTDC to evaluate storage technology as an option for Pakistan's least-cost generation mix. The Central Power Purchasing Agency Guarantee Limited (CPPA-G) has made strides towards the implementation of a competitive wholesale market, which will be an essential catalyzing factor for attracting private capital into storage technologies. The development of BESS in Pakistan has immense potential, and experts have urged the federal government to consider establishing a division to fully utilize this potential. The government aims to achieve 30 per cent penetration of renewable energy into the grid by 2030, and realizing the potential benefits of BESS is crucial to achieving this goal. The informed discussions on the future role of storage in Pakistan's energy supply mix cannot take place until the prerequisites of developing a template to enable inputting the financial, technical, and operating metrics of storage technology into PLEXOS and implementing a competitive wholesale market are met. The BESS financial screening model (FSM) and the BESS developer's investment model (DIM) are two key tools that can be used to evaluate the financial viability of a battery energy storage project. The FSM can be used to screen potential projects based on their financial viability, while the DIM can be used to evaluate the investment potential of a project. The potential applications of BESS in Pakistan include electric energy time-shift (arbitrage), provision of ancillary services for grid stabilization, and renewable energy integration. The development of BESS in Pakistan has the potential to overcome several challenges related to large-scale grid integration of renewables. Batteries are technically better suited for frequency regulation than traditional spinning reserve from power plants. They provide a cost-effective alternative to network expansion for reducing the curtailment of wind and solar power generation. Additionally, batteries enable consumer peak charge avoidance by supplying off-grid energy during on-grid peak consumption hours. The SEP project has identified several potential locations for BESS deployments in Pakistan, including the provinces of Punjab and Sindh. The project has also identified several potential technologies for BESS deployments, including lithium-ion batteries and lead-acid batteries. The project aims to develop a comprehensive plan for the development of BESS in Pakistan, including the identification of potential locations, technologies, and implementation strategies. The development of BESS in Pakistan has the potential to contribute significantly to the country's energy security and reduce its reliance on imported fossil fuels. The project aims to develop a comprehensive plan for the development of BESS in Pakistan, including the identification of potential locations, technologies, and implementation strategies. The project will also provide training and capacity-building programs for Pakistani stakeholders to ensure the successful implementation of BESS in the country.