Distributed Energy Management of PV-Storage Systems for Voltage Rise Mitigation

Abstract

This paper develops a distributed consensusbased energy management scheme (EMS) for multiple photovoltaics+energy storage systems (PV+ESS) connected to a smart distribution network. First, each customer individually determines the optimal size and initial scheduling of ESS to be installed in parallel with PV over a dayahead planning horizon. The objective of installing ESS is to reduce the electricity bill while minimizing ESS aging effect. Then, after the day-ahead planning, customers manage their system in a near real-time fashion to account for voltage conditions in order to avoid voltage-rise-associated curtailments. Customers along the feeder communicate with each other and exchange information about voltage deviation at their nodes in order to reach a consensus about average voltage situation in the distribution network. Based on voltage situation, EMS updates the lower bound on net power exchange with the grid for the hour ahead. Also, an iterative method is proposed to determine the lifetime of ESS and the economic benefits gained over the lifetime. Simulation results for IEEE 33-bus test system prove the effectiveness of the proposed EMS and its financial viability. Keywords

Game theory based bidding strategy for prosumers in a distribution system with a retail electricity market

“…The reactance and resistance data for each bus in the modified IEEE 33‐bus test feeder are listed in Table 2. The active and reactive power demand for each bus in the modified IEEE 33‐bus test feeder are from [37]. For the simplicity of demonstration, three prosumers are assumed on buses 4, 8 and 20 that are able to provide self‐generated electricity using RES units, CCHP, and distributed ES systems.…”

Mitigating Overvoltage in Power Grids with Photovoltaic Systems by Energy Storage

“…A considerable amount of scientific work has already been dealing with batteries, a useful operation algorithm and their impact on grid stabilization and resilience enhancement, as according to [11] battery storage systems are able to provide reserves for ancillary services such as frequency-control. In [12] sizing and managing BESS in private energy systems including small-scale PV plants is utilized for voltage rise mitigation in the observed section of the distribution grid. The authors of [13] deal with optimal battery sizing and then introduce in [14] an algorithm that determined the best position for a BESS within a part of the distribution grid.…”

Smart grid lab research in Europe and beyond

“…Colorado School of Mines' research group on the Advanced Control of Energy and Power Systems (ACEPS) engages in research on intelligent control systems for power systems and power electronics, real‐time monitoring and advanced diagnostic systems, artificial intelligence, advanced acoustic, optical and electromechanical sensors, pollution reduction, transformers and breakers monitoring, smart substations, power quality, nondestructive evaluation, advanced power electronics, remote sensing, security, control, and integration of renewable and alternative energy sources into the grid …”