IEC_Elctrical Energy Storage.pdf

Remote datameasurements connected to the grid

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Remote Data/Measurements connected to the grid, illustrated in Figure 3-19. This diagram represents an aggregation of EES systems and DGs (Distributed Generators) which can behave like one entity, a so-called “VPP with EES” in this example. VPP stands for Virtual Power Plant which, according to one definition, is the technology to aggregate power production from a cluster of grid-connected distributed generation sources via smart grid technology, by a centralized controller which can be hosted in a network control centre or a major substation . The integration of distributed energy storage systems at different locations of the grid will further enhance the capabilities of Figure 3-19 – A generalized control concept for aggregated EES systems and DGs (ABB) VPP with EES EES System to grid Control Center/Substation Communication Connection Electrical Connection Remote Data/Measurements EES System EES System EES System DG DG DG DG
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60 S E C T I O N 3 Markets for EES the VPP. It should be noted that in the figure the communication and electrical infrastructures are highly simplified in order to show the general concept but not the details. A concrete example of an implementation based on aggregated energy storage systems using batteries is given in the following section on “battery SCADA”. 3.3.4 “Battery SCADA” – aggregation of many dispersed batteries As progress is realized in battery capabilities and costs, many batteries will be installed both by consumers and in the grid, with large cumulative capacity and correspondingly large effects. Most will be small battery storage systems, dispersed in location and used locally. However, if they are gathered into a virtual assembly and controlled centrally, they may also be used for many utility applications, such as load frequency control, load levelling and control of transmission power flow. To Figure 3-20 – Schematic diagram of Battery SCADA (TEPCO) implement such uses, a group of battery manufacturers and electric utilities in Japan is developing technologies for central control of dispersed batteries, named “Battery SCADA”. Using Battery SCADA distributed batteries can be assembled and managed like a virtual large- capacity battery, and batteries with different specifications made by different manufacturers can be controlled and used by grid operators in an integrated way. Battery SCADA is shown schematically in Figure 3-20. Information from batteries on both the grid side and the customer side is collected by Battery SCADA, processed, and transmitted to the control centre. Based on this information and the situation of the network, the control centre sends commands to Battery SCADA, which distributes corresponding commands to each battery system. Demonstration of this technology will start in 2012 in Yokohama City, Japan, with various types of Li-ion batteries installed on the grid side and in consumer premises, to be controlled by the Battery SCADA.
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Forecast of EES market potential by 2030 SECTION 4
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62 S E C T I O N 4 Forecast of EES market potential by 2030
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