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In order to ensure the stable operation of the power grid, this paper aims at the modeling of the integrated information system of the photovoltaic power plant, and the model of the PV module is divided into physical characteristics. In order to ensure the stability of the power grid, Model and external characteristic model. The PV module model based on the physical characteristics is based on the...
With the increase of the number of photovoltaic grid connected power plants and the increase of capacity, the impact on the protection and control of the grid can not be ignored. The establishment of electromagnetic transient simulation and equivalent calculation model of photovoltaic power station is the basis for studying its grid connection characteristics and its impact on relay protection. The...
At present, the research on the quality of micro-grid power at home and abroad is still at the initial stage, which focuses on the study of the power quality characteristics of micro-sources. There is little research on the quality control of micro-grid power and the power quality adjustment device for microgrid. In particular, there is no literature on the power quality of the microgrids containing...
Along with our country the implementation of the strategy of developing the new energy, solar energy is a kind of ideal clean energy future energy, with the power grid operation requirements of photovoltaic power generation system is increasing day by day, for the needs of the operation and control, is necessary for photovoltaic system monitoring, photovoltaic power plant key components of condition...
Distributed generation provides a new opportunity for modern power supply, and also challenges the safe operation of the existing power system. This paper studied on site selection and protection configuration of distributed power supply in microgrid system, mainly including the objective function and constraint conditions of distributed power source siting in microgrid system, the revision of distributed...
Transmission line is one of the most important parts of power network, and its operating safety is the guarantee of the power network's operating safety. The operational accidents on transmission line are mainly caused by lightning accidents. Therefore, grasping the rules of lightning activity on transmission line and studying on lightning current amplitude have very important guiding significance...
The effect of stability on reliability is a complicated problem of power system operation, and this issue has not yet been paid enough attention to the relevant research. Aiming at the problem of weak node based on voltage stability, This paper presents a method to evaluate the reliability and the weak points of optical storage and grid connected system from the angle of node voltage. Proposed the...
With the rapid development of PV technology and a large number of construction and operation of PV power stations, the environmental impact of PV power project has been attracted more and more attention. This paper mainly analyzes environmental impact factors and mitigation measures of the PV power generation; determine the assessment procedures of the PV power station's environmental impact. The...
The fault diagnosis modes and fault reasons of grid-connected photovoltaic power system were described, and as to the possible faults of solar grid-connected power system, a method of fault diagnosis based on BP neural network was proposed. The fault information was used as samples to train the BP neural network, and the relations between the network fault information and fault patterns output were...
In order to simulate and analyze the operation characteristics of the grid connected photovoltaic power generation system, dynamic modeling and simulation of grid-connected photovoltaic (PV) power stations were researched. First, a dynamic mathematical model for stability analysis of grid-connected PV power stations was established, considering maximum power tracking control, constant power control,...
Distributed generation provides a new opportunity for modern power supply, but it also impacts on the operation and management of distribution network. Distributed power connected to the distribution network has changed the mode of operation of the distribution network from the original radiation type to a multiple power supplies network. The power flow direction of the traditional distribution network...
With the developing of distributed clean energy in Photovoltaic and Energy Storage concentrated areas, the lower voltage quality has become a major problem of the distribution network right now. With regard with the lower voltage problem ofPhotovoltaic and Energy Storage concentrated areas, this paper from the perspective of the active distribution network, conducts sensitivityanalysis for reactive...
Active distribution network is an effective way to realize the integration of distributed new energy sources in the future. This paper focuses on the coordinated control framework of multi-time scales distributed generation for active distribution network under normal operating conditions, including scales for a long time in active distribution network the optimization control and short time scaleactive...
Distributed PV storage micro grid, which is composed of photovoltaic energy storage and distributed energy and load, not only can effectively use the distributed photovoltaic power supply, but also can improve the power supply reliability level and the energy utilization rate of power system. In order to effectively utilize the distributed photovoltaic power generation, the control strategy of the...
In order to ensure the accuracy of the output of the photovoltaic power generation system, the identification of the photovoltaic parameters is carried out. In photovoltaic power generation system, the analysis is made from two aspects: photovoltaic array and grid connected inverter. The key parameters affecting PV model output are found. Using the recursive least squares method to develop grid-connected...
As scale of solar photovoltaic application continues to expand, real-time state monitoring, fault diagnosis and fault positioning for photovoltaic(PV) array are becoming more and more important. A kind of PV array sensor embedding method is put forward to reduce usage of sensors on the basis of assure positioning precision. With the structure the consistency and strategic decision problems among the...
Micro-grid is a kind of new organization and structure of distributed energy, It integrates the advantages of distributed generation and weakens the adverse impact of the distributed generation on the grid. It makes the distributed power generation units, power grid and the end users to be connected as a whole, so the structure and configuration can be optimized easily. At the same time, the operation...
In order to improve the efficiency of photovoltaic array, which need maximum tracing power. Perturbation and observation method has become one of the algorithm of the wide range research because of its simple and easy. But the traditional P&O will be oscillation in near the maximum power point due to its fixed step disturbance and leads to some loss of power and in certain circumstances and incorrect...
To solve the problem of the variance of the photovoltaic power when photovoltaic power station connect with the power grid, a photovoltaic power predicting model of photovoltaic power station based on double ANNs is proposed in the paper. Wind velocity and wind direction on photovoltaic power station are the key of photovoltaic power predicting, and other circumstance conditions such as temperature,...
Gamma‐ray spectrometer (GRS) is one of the main payloads on the Chang'E‐1 (CE‐1) lunar probe, mainly aimed to detect the elemental abundances and distributions on the lunar surface. At 03:58 on 28 November 2007, it performed the first observation of the lunar gamma rays. As of 24 October 2008, 2105 h of effective gamma rays spectra had been acquired by CE‐1 GRS, which covers the whole surface of the...
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