The Review of the Impact of Large Scale Photovoltaic Power Generation on Power System

Abstract

Human concerns energy security and worries environmental deterioration, which makes full use of renewable energy, become a global consensus. Such solar, wind as the representative of the large-scale grid connected power generation with renewable energy has become an irresistible trend of development of new power system, has deep influence on power system, and the academe and engineering give great attention. The purpose of the paper is review of domestic and foreign large-scale photovoltaic research present situation, which is aim to explore the factors on affecting the interaction between solar power generation and power system, refine the academic and engineering problems, and sort out the next step development ideas. From the power system planning, simulation, scheduling and control of angle, this paper lays emphasis on discusses in the modeling and simulation of large-scale PV systems, effects of large-scale photovoltaic (PV) accessed to the dynamic and steady state characteristics and the key technology of large-scale photovoltaic delivery and consumptive analysis.

Research on Fast Frequency Response Control of PV Power Stations

“…Referring to static frequency responed characteristics of the synchronous generator, the active powerfrequency sag characteristic curve (as shown in Figure 4, the frequency dead zone is 49.967 Hz~50.033 Hz, and the power limit is 0.1 Pn) is set by improving the inverter`s initial control strategy based on active power to realize PV inverters actively participate in frequency regulation of power system ,the corresponding formulation is illustrated in Eq. (1).…”

“…Recently, with the gradual maturity and application of photovoltaic(PV) power generation technology, the installed capacity of PV generation and its proportion in the power structure also rapidly increased. As of 2021, capacity of grid-connected PV generation had reached 306 GW in China [1]. At the same time, because the output power of PV generation is intermittent, random, and fluctuating with the change of illumination, the power disturbance brought by the randomness will wholely be regulated by the conventional synchronous generator sets, leading to fluctuations in the grid frequency, and as the proportion of PV generation raises, the problem of grid frequency dip becomes more and more serious [2] [3].…”

System architecture and coordinated control strategy of meshed AC/DC distribution grid based on active power filter

“…More and more distributed generation is connected to the distribution network. However, a large number of PV access also brings harmonic pollution, voltage fluctuation, bidirectional power flow and DC injection [1] , which brings great challenges to the safe, stable and efficient operation of traditional distribution grid [2]- [4] . Transforming the form of electric energy, improving the power transmission capacity and reducing the power loss of the distribution grid on the basis of the traditional three-phase AC technology, so as to realize the safe and efficient operation of the distribution gird has become an important issue in the field of power distribution [5] .In order to realize the flexible regulation of the distribution station area and the comprehensive management of the power quality of the distribution grid, the multi-port power electronic transformer based on the cascaded H-bridge is introduced into the distribution station area as a hub device in Reference [6],which is to construct an AC/DC distribution grid with comprehensive power quality management capabilities.…”

Classification of highly permeable distributed photovoltaic clusters considering comprehensive indicators

“…Renewable energy generation has received attention due to its characteristics of zero environmental pollution in the context of increasingly depleted fossil energy and severe environmental pollution. Therefore, the grid-connected operation of nonfossil energy sources such as photovoltaics has developed rapidly [1] . Among them, the distributed generation method of renewable energy has the advantages of flexible operation and a small footprint, which has attracted widespread attention.…”