Optimizing Energy Storage: A Novel Hybrid Power System Combining Supercapacitors and Lithium‐Ion Batteries With Advanced Optimization Algorithms

Research progress, trends and prospects of big data technology for new energy power and energy storage system

Power devices such as power generators, loads, and storage systems vary widely in terms of their cost, performance, capacity, and reliability over time. With the growing requirement for cost-effective power generation and storage systems, the selection of these power devices for long-term cost savings and better performance are challenging tasks. In this paper, toward achieving the best selection of power generator sizes and storage capacities, we propose a Linear Programming based co-optimization of controllable generator sizes and storage capacities with the consideration of system condition which is necessary to keep operating under the fluctuations of renewable energy sources and user demands. The experimental results demonstrate how the cost-ratio between a generator and a storage affects the best combination of generator sizes and storage capacities.

The peak and valley load differences in residential communities are large, and there is a timing difference between the peak hours of load and photovoltaic power generation. As a result, power storage system deployment can employ photovoltaic output to lessen peak and valley load discrepancies. To make power storage design in residential areas more feasible, the research initially examines the influence of charging and discharging rate and depth on the life of power storage batteries to develop a dynamic loss model for power storage batteries and estimate the operational life of the system; secondly, as the goal function, the largest yearly net revenue is used to optimize the optimization of the power storage system; finally uses particle swarm algorithm to simulate the power storage system in residential communities under different operational scenarios. The results indicate that the residential district power storage system is more effective in the grid-connected scenario and validate the reasonableness and effectiveness of the model used, providing a reference for the planning and construction of residential district power storage systems.

In this study, we investigate the feasibility of using an electric vehicle (EV) as a power storage device in a power-grid in which photovoltaic power generation (PV) is introduced. In recent years, EV has been of interest from a transportation and domestic power storage point of view. When huge distributed generators are installed in future power systems, more power storage systems should be introduced to achieve a stable power supply condition. Therefore, we discuss a suitable sharing method between EV and a fixed storage system.

In these years several types of power storage devices have been researched to commercialize various kinds of mobile equipments. In addition to the power storage devices themselves, the utilization has been studied since it has the potential to change the conventional power management. The effective integrations between power storage devices and conventional power sources have been developed and demonstrated for not only the mobile power management but also the stationary one. In this study, a power storage system is integrated into a high-efficient lean-burn gas engine in order to improve the operating stability at islanding operation by using the flexible power controllable capability of power storage system. We have designed and demonstrated the effective power control method of the power storage system to absorb the abrupt power change of a lean-burn gas engine, and to stabilize the operation when the load changes. This method provides the effective use of the limited capacity of the power storage system for the integration as well as the stable power supply by islanding operation.

In order to avoid the spatial magnetic field distortion caused by the submarine induced magnetic field, the real-time degaussing current is input in the longitudinal, transverse and vertical directions inside the submarine, and the nine components of Ziz, Yiz, Xiz, etc. on the x, y and z three-direction windings are magnetically applied Compensation to improve the magnetic protection capability of the submarine. Aiming at the high coupling problem when the unidirectional winding is used to compensate the unidirectional component of the magnetic field, this paper proposes a new whale optimization algorithm based on adaptive weighting and simulated annealing strategy. The algorithm uses a time-varying function to control the inertia weight coefficient, and adjusts the adaptive weight to improve the convergence speed of the algorithm; The simulated annealing strategy is introduced to accept poor solutions with a certain probability, and the algorithm's global optimization capability is enhanced. Flux 3D is used to perform high-precision finite element simulation on the three-dimensional space model of the submarine, and the magnetic field distribution and change law of the three-component submarine space are studied, and the three-component magnetic field compensation curve of the submarine's longitudinal, transverse and vertical windings is obtained. Building a real-scale simulation platform to verify the accuracy of the multi-dimensional magnetic field compensation results. The results show that the improved whale optimization algorithm has a magnetic field compensation effect of more than 90% on the Ziz, Yiz, and Xiz components of the vertical winding, and it has a strong global search ability and fast convergence speed, which proves the effectiveness of the algorithm in the submarine magnetic field compensation.

Optimal operation of smart energy hub considering high-temperature heat and power storage

A bio-nanobattery is an electrical energy storage device that utilizes organic materials and processes on an atomic, or nanometer-scale. The bio-nanobattery under development at NASA s Langley Research Center provides new capabilities for electrical power generation, storage, and distribution as compared to conventional power storage systems. Most currently available electronic systems and devices rely on a single, centralized power source to supply electrical power to a specified location in the circuit. As electronic devices and associated components continue to shrink in size towards the nanometer-scale, a single centralized power source becomes impractical. Small systems, such as these, will require distributed power elements to reduce Joule heating, to minimize wiring quantities, and to allow autonomous operation of the various functions performed by the circuit. Our research involves the development and characterization of a bio-nanobattery using ferritins reconstituted with both an iron core (Fe-ferritin) and a cobalt core (Co-ferritin). Synthesis and characterization of the Co-ferritin and Fe-ferritin electrodes were performed, including reducing capability and the half-cell electrical potentials. Electrical output of nearly 0.5 V for the battery cell was measured. Ferritin utilizing other metallic cores were also considered to increase the overall electrical output. Two dimensional ferritin arrays were produced on various substrates to demonstrate the feasibility of a thin-film nano-scaled power storage system for distributed power storage applications. The bio-nanobattery will be ideal for nanometerscaled electronic applications, due to the small size, high energy density, and flexible thin-film structure. A five-cell demonstration article was produced for concept verification and bio-nanobattery characterization. Challenges to be addressed include the development of a multi-layered thin-film, increasing the energy density, dry-cell bionanobattery development, and selection of ferritin core materials to allow the broadest range of applications. The potential applications for the distributed power system include autonomously-operating intelligent chips, flexible thin-film electronic circuits, nanoelectromechanical systems (NEMS), ultra-high density data storage devices, nanoelectromagnetics, quantum electronic devices, biochips, nanorobots for medical applications and mechanical nano-fabrication, etc.

This paper proposed a Mixed Binary Linear Programming (MBLP) approach to find the optimal size of some components of a Smart Building (SB) attempting to reduce the overall cost. The considered SB is equipped with local resources such as Photovoltaic (PV) panels, Electrical Vehicles (EVs), and the Battery Energy Storage System (BESS). Moreover, the SB is only connected with the grid by an Energy Management System (EMS) in which the whole SB has a single Contract Power (CP) such that EMS manages the power flow among external grid, local resources, apartments, and common services, for the goal of reducing the electricity bill. Hence, the wrong choice of CP and BESS capacity will impose unnecessary charges on the electricity bill. As a results, EMS has played a crucial role in SB in determining the best CP and BESS values. The obtained results of this work show the efficiency of the model in which by finding the optimal capacity of CP and BESS, the electricity bill improves by a 34% reduction.

_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 31703, “Repurpose Offshore Pipeline as Energy Storage (ROPES): Opening a New Market Segment Offshore,” by Azril Syazwan Hazim, SPE, Subsea 7, Daniel Buhagiar, FLASC, and Alasdair Gray, Xodus. The paper has not been peer reviewed. Copyright 2022 Offshore Technology Conference. Reproduced by permission. _ The repurposed offshore pipelines as energy storage (ROPES) solution repurposes aged offshore installations into energy storage systems based on proven hydropneumatic principles toward a cost-competitive, reliable system. Findings from a recent concept-assessment study show the cost competitiveness of the solution as a result of a low levelized cost of storage (LCOS) paired with the value of deferring full decommissioning of existing assets. The ROPES solution enables the storage of renewable power while allowing for the optimization of time and expenditure for decommissioning of infrastructure. Background Energy-storage technologies address a fundamental problem related to the integration of renewable energy production into conventional energy systems on a large scale: the mismatch between intermittent energy supply and consumer demand. Balancing supply and demand is quickly becoming the greatest obstacle to increased uptake of renewable energy. An emerging industrialized energy storage solution (ESS) technology uses mechanical power storage based on proven fluid-compression principles. Hydropneumatic energy storage (HPES) relies on a large pressure containment system (PCS) that acts as a pressurized liquid piston—potentially a pipeline system—with energy activated by a pump and recovered through a turbine. The solution is positioned to improve on economics for offshore wind farms either through remote units within each turbine or through the ROPES concept, with the energy conversion unit (ECU) on either the seabed or an adjacent decommissioned offshore platform. Overview of HPES Technology The proprietary HPES system stores energy by using it to pump seawater into a closed chamber to compress a fixed volume of precharged inert gas. The energy then can be recovered by allowing the compressed gas to push the water back out through a hydraulic turbine generator. The technology embodies a patented combination of two key features: - Pneumatic precharging allows the system to be installed in shallow water, making it suitable for both fixed-bottom and floating wind applications. - Using the ocean as a natural heatsink results in an efficient, isothermal system without the need for complex thermal-management systems.

Introduction One of the critical technological isuues to constract carbon neutral society is the suppression of the impact of the volatility in power generation from inexpensive variable renewable energy power sources, such as solar cells and wind powers. It is necessary to maintain a balance between power generation, transmission, and consumption, and to maintain three types of stability in the power system: frequency stability, synchronization stability, and voltage stability. For this reason, energy storage technology is one of the most important issues for making up carbon neutral energy system. Among energy storage technologies, lithium-ion secondary batteries are superior in terms of both output density and energy density, but they present a cost challenge for large-capacity energy storage. Pumped storage power generation is the mainstay of long-term large-capacity energy storage in the current power system, but significant pumped storage expansion is subject to geopolitical constraints. Therefore, a compact, large-capacity energy storage system that can be installed in the power grid is required to expand the introduction of variable renewable energy power sources.In this research, we first describe the operating mechanism and advantages of the "Carbon/Air Secondary Battery (CASB) system" [1,2], a compact power storage system that integrates the functions of a solid oxide fuel cell that generates electricity by producing CO2 through the oxidation reaction of carbon and a solid oxide electrolytic cell that produces carbon through the electrolysis of CO2. The operating mechanism and features of the CASB system are introduced. In addition, we report the calculation results of feasible system efficiency based on thermodynamic considerations compared to power storage system using H2/H2O-solid oxide fuel cells/electrolysis cells. In addition, the advantages/disadvantages of the two types of CASBs, integrated type of CASB between carbon deposition /electrochemical reaction, and the separated type of CASBs, as well as their representative charge/discharge characteristics will be presented. Theoreticl advantage of CASB as a fixed compact power storage with large capacity The theoretical charge/discharge efficiency of CASB, which is the ΔG/ΔH of reaction “C+O2→CO2” is 100%. This means that there is no heat input and output ideally in both carbon generation and CO2 electrolysis (in charge/discharge). Therefore, temperature control is simple and a heat exchanger can be minimized, which may allow the system to be compact. The feasible charge/discharge system efficiency of CASB including possible heat exchange were estimated as 92% based on thermodynamics, which is much higher than that of power storage system using H2/H2O-solid oxide fuel cells/electrolysis cells (63%). In addition, since CO2 can be liquefied at about 6.4 MPa at 25°C, its volumetric energy density to 1.62 × 103 Wh L-1, about four times higher than the volumetric energy density of hydrogen compressed at 20 MPa at 25°C, 3.79 × 102 Wh L-1. A key technological point of CASB at its discharging , which is combination between electrochemical reaction (CO2→ CO+O2-) and thermochemical reaction (2CO→ C+CO2) by achiving at closed system The discharge reaction of the CASB is the same as that of the Rechargeable Direct Carbon Fuel Cell [3,4,5]. The reason for the first successful demonstration of the CASB is that the combining electrochemical reaction with low overpotential (CO2 →CO+O2-) with the thermochemical reaction, the Boudouard equilibrium reaction (2CO → C+CO2) were achieved at the charging by making the system a closed system. Two types of CASBs, (1) Integrated type of CASB between carbon deposition /electrochemical reaction, and (2) the separated type of CASBs Since generally, the carbon deposition on the electrode cause its degradation [6], two type of CASBs can be designed and demonstrated (as shown in Fig.1). Both types of CASBs could be demonstrated.

The satellite power system is a vital component of all satellites and involves a number of parts. All of these parts play an important role in the success or failure of a small satellite mission. Since electrical power systems have been around since the beginning of the space age, and their function has been well established, this part of a satellite design for this reason might be taken for granted. It also may be outside the expertise of cubesat builders with limited experience. This is a serious problem, as many telecommunications systems, on the ground or in space, often fail due to a power failure. This can be not only because the power generation or storage system fails but for other seemingly mundane factor such as a simple short in a wiring system that causes a satellite to fail due to a lack of critical power supply or even an electrical fire that destroys the entire satellite. Other sources of failure can come from as simple a problem as the leads from solar cells or photovoltaic cells failing due to contamination or oxidation that creates an overall power failure for a satellite. Experience over the years have confirmed the need to carefully design, manufacture, and test all aspects of a satellite’s electrical power system in terms of safety, resilience, and lifetime performance. This important work is often overlooked or minimized in cubesat projects. This chapter discusses all aspects of electrical power generation, an electrical power distribution system, power storage, and effective design of an electrical power system for all types of satellites that range from a femtosat (10 to 100 grams), a picosat (100 grams to 1 kg), a nanosat (from 1 kg to 10 kg) that includes cubesats, a microsat (from 10 kg to 100 kg), and a minisat (from 100 kg up to 500 kg in some definitions and from 100 to 1000 kg in others). The point is that power systems can command a good deal of the mass and volume of a satellite regardless of its size, and thus the power-to-mass ratio is important in satellites designs and especially so in the case of small satellites. Different approaches to power can thus be taken for different types of small satellites depending on their mission, lifetime requirements, and overall mass and volume. Finally, this chapter seeks to provide information developed by NASA and other objective sources about the suppliers of critical elements of an electrical power system for small satellites and especially with regard to solar power cells and power storage units.

The three-level converter based on A-NPC topology can improve waveform quality of the output voltage, decrease the switch voltage and reduce the loss of the inductor, thus it has broad application prospects in the electrical power storage domain. This paper built the semi-physical real-time simulation platform of A-NPC three-level battery power storage system by designing the control system and the main circuit of the A-NPC topology converter, and researched the control mechanism of the power storage converter control algorithm with digital simulation platform. The experimental results of the prototype machine show that the A-NPC three-level battery power storage system built in this paper was fine, compared with the most common two-level topology, three-level converter has characteristics of lower output current waveform distortion factor, lower current harmonics and higher efficiency. Three-level converter used in the power storage system is able to gain access to low THD during steady-state operation and fine dynamic characteristics.

Power grid is developing towards the direction of intelligence. Nevertheless, the giant grid scale, complicated structure and external natural factors result in the potential of large-scaled power failure. Traditional black start power gives priority to hydropower. In areas with shortage of hydro power resources, suitable black start power is insufficient. The key of black start is able to realize the safe and stable operation of wind power and energy storage cogeneration system. Due to the combination of wind turbines and energy storage is a small system, energy storage, as a black start power source, starts the wind turbines together to supply power for the remote load. Therefore, it is necessary to run the balance and stable operation of a small system. In this paper, PSCAD simulation software is employed to conduct modeling of wind power and energy storage system, and the self-starting process of wind storage cogeneration system is analyzed by using resistance sensor as the load. The result verifies the wind power storage system's initiation process.

Since the launch of Russia's Sputnik-1 satellite on October 4,1957, the aerospace industry has been obsessed with an endless hunger for more mass and volume efficient power storage systems for its orbital spacecraft. Mass and volume aboard these spacecraft are at a premium with costs reaching into the tens of thousands of dollars per kilogram (kg) of launched mass. Over the years, the launcher industry has steadily increased its capacity for propelling more and more mass into orbit. While there is still a major emphasis on scientific exploration of space, there are a growing number of commercial spacecraft which are being pkced into orbit strictly for the purpose of generating revenues. For these programs, increased time on orbit means increased revenues. With less of the overall mass and volume budget spent on power storage, longer spacecraft orbital lifetimes can be achieved by increasing the amount of fuel carried onboard. Increased time on orbit can, in turn be translated into a need for more advanced power storage systems with even longer cycle life capabilities. tional systems onboard these vehicles. During this period, battery manufacturers have continued to produce the best battery cells and batteries that the technology of the day would allow. These systems have included 1) commercially available batteries such as standard lead-acid and nickel-cadmium and 2) custom designed power systems, engineered and manufactured specifically for the aerospace industry. These specialized systems include high reliability, aerospace nickel-cadmium and nickel-hydrogen cells and batteries. In addition, development efforts are currently underway to flight qualify a number of new and exciting power storage technologies. These new technologies include not only the advanced nickel-hydrogen electrochemistries, but the secondary lithium systems, lithium-ion (Li-ion) and lithium-polymer as well. During the forty year history of spaceflight, both primary (non-rechargeable) and secondary (rechargeable) battery systems have been used to provide power for the many and varied operaBattery Technologies Nickel-Cadmium (Ni-Cd) The nickel-cadmium battery has been in use in a variety of applications since the early 1900's. It has been developed into one of the most widely used secondary systems in use today. Two of the more advanced applications are 1) aircraft engine starting/auxiliary power units and 2) onboard satellite power storage. The following is a list of some of the significant features which 35th Aerospace Sciences Conference and Exhibit; Reno, Nevada, January 6-9, 1997 have led to Ni-Cd battery's widespread use within