KEYWORDS: Photovoltaics, Telecommunications, Solar energy, Power grids, Data acquisition, Transformers, Distributed computing, Data fusion, Data communications, Control systems
With the large number of low-voltage distributed new energy access, it has brought great challenges to the safe and stable operation of the power system, and it is necessary to effectively control the new energy with randomness, volatility and uncertainty in the distribution network. In this paper, based on the research of the site-wide distributed photovoltaic interactive system based on HPLC communication, the problems of data transmission network and communication mode are solved through the site-wide distributed photovoltaic interactive system networking, and the real-time data acquisition and precise command control of site-wide distributed photovoltaic power generation units are realized through the distributed photovoltaic interactive system. The system realizes the "observable, measurable, adjustable and controllable" requirements of the new power system after the high proportion of distributed photovoltaic is connected to the grid, helps the high proportion of distributed photovoltaic to the grid and reasonable consumption, and improves the security and stability of the power system.
KEYWORDS: Blockchain, Databases, Design and modelling, Data modeling, Telecommunications, Tolerancing, Systems modeling, Failure analysis, Technology, Computing systems
The emergence of cryptocurrencies has promoted the development of blockchain technology. However, due to the low performance and poor scalability of the blockchain, it is difficult to apply the blockchain technology to production. Analysis of its essential reason is mainly caused by the distributed consensus protocol. Distributed consensus protocols provide data transparency, integrity, and immutability in a decentralized and untrusted environment, but good security greatly sacrifices scalability. In order to improve the performance and scalability of the system. This paper first improves the Byzantine consensus protocol and improves the throughput of a single shard; on this basis, an efficient shard formation protocol is designed, which can safely assign nodes to shards. This paper relies on trusted hardware (SGX) to achieve consensus and sharding protocol performance improvements. Second, we design a transaction protocol that ensures transaction security and flexibility even when the transaction coordinator is malicious; finally, our research is extensively evaluated on local clusters and on Google Cloud Platform. The results show that the consensus and shard formation protocol in this paper outperforms other advanced solutions in scale and can well scale the blockchain system through sharding and consensus formation protocol. More importantly, the scalable blockchain system based on the sharding strategy proposed in this paper achieves high throughput and can handle Visa-level workloads.
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