Abstract
The development of smart power systems in Industry 4.0 will bring people better quality electrical energy. The photovoltaic power generation system in the smart grid for Industry 4.0 is also the focus of development. The rapid development of photovoltaic power generation systems will bring people cleaner and greener energy. However, it will cause the transient overvoltage phenomenon near the DC sending terminal when the large-scale photovoltaic plant is connected to the power grid, further bringing about a profound impact on the power grid and its security and stability. In this paper, it is proposed that the rise of transient overvoltage at the photovoltaic terminal is caused by three main factors including the reactive power surplus of DC commutation failure, the weak power grid at the sending terminal, and the control characteristics of the photovoltaic plant. Then, the coordinated control strategy of transient overvoltage is proposed, and the overvoltage control strategy of the DC transmission terminal and the photovoltaic power plant control strategy are, respectively, optimized. Finally, the influence parameters of overvoltage are analysed and the corresponding photovoltaic strategy is presented. The optimization results of photovoltaic parameters and the proposed strategies of photovoltaic power generation can effectively restrain the voltage or frequency fluctuation and power oscillation caused by HVDC commutation failure. This study promotes the development of the photovoltaic power generation system in the intelligent power system of industry 4.0.
Highlights
Introduction e intelligent power system forIndustry 4.0 is built on the basis of a high-speed two-way communication network.rough advanced sensing and measurement technology, the goal of economic, safety, and reliability of the power grid is achieved [1, 2]. e grid-connection security of the photovoltaic power generation system in the smart grid is still the focus of research [3,4,5]
In the aspect of control strategy optimization of photovoltaic power generation access to the power system, most research studies focus on the reliability of the photovoltaic power plant itself
Few studies have considered the needs of the power grid, and there are very limited research studies on the optimization of the control strategy for large-scale photovoltaic power generation access to the DC send/receive end near-region power grid [6,7,8,9]. e installed capacity of new energy in the Qinghai Power Grid exceeds 50% of the gross installed capacity in Qinghai Province, which has become the first installed power source in the province
Summary
E development of smart power systems in Industry 4.0 will bring people better quality electrical energy. e photovoltaic power generation system in the smart grid for Industry 4.0 is the focus of development. e rapid development of photovoltaic power generation systems will bring people cleaner and greener energy. The mechanism of transient overvoltage is analysed, and it is proposed that the transient overvoltage at the end of photovoltaic, the most severe problem, is caused by three main factors: reactive power surplus of the accelerating effect of the control characteristics of the photovoltaic power plant and the weakness of the sending end of the power grid and DC commutation failure On this basis, this paper puts forward the transient overvoltage suppression measures, optimized with regard to the DC control strategy (the source of the over voltage) and the side of the photovoltaic power station where the over voltage is the most serious, so as to effectively restrain the transient overvoltage at the DC sending end and avoid large-scale photovoltaic power generation chain off the grid. E inverter bridge switch tube is driven. e protection control strategy refers to undervoltage protection, overvoltage protection, and over-underfrequency protection. e protection action value is set according to the standard requirements
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
