A system includes at least one generator coupled to an island grid, at least one energy storage unit and at least one converter coupled to the at least one energy storage unit and configured to be coupled to the island grid. The system further includes a control circuit configured to cause the at least one converter to transfer power between the at least one energy storage unit and the grid responsive to a change in a load on the island grid to maintain operation of the at least one generator at a predetermined operating point. The at least one generator may include a control system configured to match generator output to the load and the control circuit may be configured to maintain the control system of the at least one generator within a predetermined dynamic response capability limit responsive to the change in the load.

Island grid power supply apparatus and methods using energy storage for transient stabilization

The higher education sector is in the eye of the hurricane of the digital revolution, immersed as it is in an ongoing digital transformation (DT) process that is expected to result in significant changes in the current business model Despite the relevance of this transformation, little remains known about how the business model is innovated (BMI), due to the impact of digital transformation in the context of higher education institutions (HEI) This research explores the impact of DT on the HEI business model, through analyzing the case of a traditional university, conceived non-digitally The results present the HEI understanding of DT, the main tensions arising from the DT process for each of the business model dimensions, and the anticipated solutions for solving these tensions Additionally, the results uncover the existence of an emergent (non-formalized) envisioned business model, which is a visualization of how the current business model is expected to be innovated, due to the impact of DT The main originality of this paper is in addressing a research gap at the intersection of DT and BMI in the HEI context

https://www.mdpi.com/2071-1050/12/12/4980/pdf

Digital Transformation for Business Model Innovation in Higher Education: Overcoming the Tensions

Energy storage is currently a key focus of the energy debate In Germany, in particular, the increasing share of power generation from intermittent renewables within the grid requires solutions for dealing with surpluses and shortfalls at various temporal scales Covering these requirements with the traditional centralised power plants and imports and exports will become increasingly difficult as the share of intermittent generators rises across Europe Pumped hydropower storage plants have traditionally played a role in providing balancing and ancillary services, and continue to do so However, the construction of new plants often requires substantial interventions into virgin landscape and bio-habitats; this is often fiercely opposed by local citizens Utility-scale lithium ion batteries have recently entered the energy scene Albeit much smaller than most pumped hydropower plants, they can also provide the required balancing and ancillary services They can be constructed on brownfield sites as and where needed, to support the move towards increasingly decentralised energy systems Although they are seen by some as a more environmentally friendly option, they do cause impacts relating to the consumption of limited natural resources during the production stage Addressing initially technological capacity of pumped hydropower storage and utility-scale battery to meet the required services, a simplified LCA will be performed to examine the environmental impacts throughout their life cycles This includes two sensitivity analyses Issues addressed in this paper include also methodological issues relating to comparability and those parameters that are pivotal to the LCA result

/pdf/life-cycle-impacts-of-pumped-hydropower-storage-and-battery-aq4p5pn35o.pdf

Life-cycle impacts of pumped hydropower storage and battery storage

Digital transformation is the integration of digital technology into all sectors of a business, fundamentally altering how you perform and bring value to customers. It has an impact and benefits on the business models, the operational processes and the customer experience. Moreover, when the digital transformation has extended to the entire areas of business activities, some of sectors has a chance to developed with more scenarios in the future comparing from others. The main goal of this paper is to give a general review of a systematic literature on digital transformation from a previous study to the latest five years. The results indicated that organizations should modify their business plan or policy to a new digital business model in order to achieve their goals. This mostly shows in the applying of operation and process management. In this study, it is very difficult to identified the entire opportunities and challenges of digital transformation, but also happened these problems in the previous study.

A Systematic Literature Review on Digital Transformation

A storage battery control apparatus includes: a storage battery state detection unit which obtains a remaining SOC which is an SOC of a storage battery at the start of a supply and demand control period; an offset power value determination unit which determines an offset power value that is a power value indicating charge or discharge; an adjustment instruction value obtainment unit which obtains an adjustment instruction value indicating a state of charge and discharge of the storage battery; and a charge and discharge control unit which performs control of discharging power from the storage battery to the grid or charging power from the grid to the storage battery, the power having a magnitude of a first power value which is a power value obtained by adding the offset power value to the adjustment instruction power value indicated by the adjustment instruction value.

Storage battery control apparatus, storage battery control method, and storage battery system

Business model is an abstract representation of a business description, and is formed to realize the value potential of a business operation. When companies are hoping to become more digital, creation of new business models may get inhibited by the vast amount of opportunities digitalization can bring and lack of streamlined digital transformation processes. Therefore, a structured and practical approach is presented here as a way to coordinate digital transformation. Best practices from business models, innovation processes, and digital businesses are brought together to establish a methodology on digital business model design. The key characteristics of digital business models derived from applying this process are represented through Digital Business Model Innovation Loops, and are validated by looking at digital initiatives in established companies.

Realizing digital transformation through a digital business model design process

Die Erfindung betrifft ein Verfahren zur Bereitstellung von Regelleistung fur ein Stromnetz, bei dem ein an das Stromnetz angeschlossener Energieerzeuger dem Stromnetz nach Bedarf Energie zufuhrt oder ein an das Stromnetz angeschlossener Energieverbraucher aus dem Stromnetz nach Bedarf Energie aufnimmt, bei dem ein Energieerzeuger und/oder ein Energieverbraucher gemeinsam mit einem an das Stromnetz angeschlossenen Energiespeicher zur Bereitstellung der Regelleistung betrieben wird, wobei der Energiespeicher ab einem ersten Zeitpunkt zumindest die Differenz der von dem Energieerzeuger bereitgestellten Leistung zu einer Nennleistung an das Stromnetz abgibt oder der von dem Energieverbraucher aufgenommenen Leistung zu einer Nennleistung aus dem Stromnetz aufnimmt und der Energiespeicher so lange zumindest diese Differenz zwischen der Nennleistung und der vom Energieerzeuger bereitgestellten Leistung oder der vom Energieverbraucher aufgenommenen Leistung bereitstellt, bis die Leistung des Energieerzeugers oder des Energieverbrauchers die Nennleistung zu einem zweiten Zeitpunkt erreicht. Die Erfindung betrifft auch eine Vorrichtung zum Durchfuhren eines solchen Verfahrens, wobei die Vorrichtung eine Steuerung, einen Energiespeicher sowie einen Energieerzeuger und/oder einen Energieverbraucher umfasst, wobei die Vorrichtung an ein Stromnetz angeschlossen ist, die Steuerung mit dem Energiespeicher sowie dem Energieverbraucher und/oder dem Energieerzeuger verbunden ist und die erzeugte und/oder aufgenommene Regelleistung steuert.

Verfahren zur Bereitstellung von Regelleistung

The invention relates to a method for providing control power for a power network, in which at least one energy store connected to the power network supplies energy to the power network as a function of a frequency deviation from a target frequency of the power network and/or absorbs energy from the power network. According to the invention, a deadband around the target frequency is specified, wherein the frequency deviation from the network frequency is measured with a higher accuracy than the width of the deadband, and a bandwidth is selected within the deadband as a function of a charging state of the energy store, wherein control power is provided outside the bandwidth. The invention also relates to a device for carrying out such a method, in which the device comprises at least one energy store and a control for controlling or regulating the control power of the energy store, wherein the energy store is connected to a power network such that energy can be supplied to the power network and be drawn from the power network by the device.

Method for providing control power using an energy store having variable deadband width when providing the control power

The present invention relates to a method for delivering control power to stabilize an AC electricity network, the AC electricity network operating at a set frequency, comprising an energy store that can take up and deliver electrical energy, the energy store being connected to at least one unit for charging and/or discharging the energy store, the unit for charging and/or discharging the energy store drawing energy from the energy store or supplying energy to the energy store with a power of at most less than or equal to 20% of the contracted maximum power of the energy store.

Method for delivering control power by using energy stores

The invention relates to a method for providing control power for a power network, in which an energy generator connected to the power network supplies energy to the power network as necessary or an energy consumer connected to the power network draws energy from the power network as necessary, an energy generator and/or an energy consumer being operated in conjunction with an energy store that is connected to the power network in order to provide the control power. According to the invention, the energy store, starting from a first point in time, releases to the power network at least the difference between the power provided by the energy generator to a nominal power or absorbs from the power network the difference between the power absorbed by the energy consumer to a nominal power. The energy store provides at least this difference between the nominal power and the power provided by the energy generator or the power absorbed by the energy consumer until the power of the energy generator or the energy consumer attains the nominal power at a second point in time. The invention also relates to a device for carrying out such a method, in which the device comprises a control, an energy store and an energy generator and/or an energy consumer, wherein the device is connected to a power network, the control is connected to the energy store and to the energy consumer and/or the energy generator and controls the generated and/or absorbed control power.

Dennis Gamrad

Papers

Realizing digital transformation through a digital business model design process

Verfahren zur Bereitstellung von Regelleistung

Method for providing control power using an energy store having variable deadband width when providing the control power

Method for delivering control power by using energy stores

Method for providing control power