Presently, conventional fixed parameters are applied in dual-parallel virtual synchronous generators (VSGs), resulting poor frequency response characteristics. Therefore, a multi-parameter cooperative adaptive control strategy is proposed this article as solution. The principle of the method that when transient fluctuation occurs VSG, deviation and rate change combined with inertia, damping coefficient, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Traditional manual testing of ventilator performance is labor-intensive, time-consuming, and prone to errors in data recording, making it difficult meet the current demands for efficiency development manufacturing ventilators. Therefore, this study we designed an automated system essential parameters The mainly comprises a airflow analyzer, switch module simulated lungs, test control platform. Under software, can perform tests critical ventilators generate final report. To validate...

High penetration of renewable energy such as wind and photovoltaic (PV) power have brought huge challenge to the safe stable operation for regional system. An analytical framework output characteristics is proposed in this article. Based on historically measured data, farms PV plants Shaanxi Province comprehensively analyzed summarized, including yearly characteristics, daily fluctuation geographical dispersion complementarity power. By analyzing collected data several plants, paper aims...

The Fe–Nd–Sb system was assessed by means of the CALculation PHAse Diagram (CALPHAD) technique. solution phase, liquid, bcc, fcc, dhcp, and rhom, were described substitutional model. compounds Fe17Nd2, Fe17Nd5, Nd2Sb, Nd5Sb3, Nd4Sb3, NdSb, NdSb2, Nd6Fe13Sb (τ1), Nd3Fe3Sb7 (τ3), NdFeSb3 (τ4), NdFe4Sb12 (τ6) treated as stoichiometric compounds. ternary Nd2Fe5−xSb10−y (τ2, x = 1.48, y 5.12) NdFe1−xSb2 (τ5) modeled (Fe,Va)0.4667(Nd)0.1333(Sb,Va)0.4 (Fe,Va)0.25(Nd)0.25(Sb)0.5, respectively. A set...

In order to better realize the plug and play function of various distributed energy sources (photovoltaic, storage batteries, etc.) in DC micro-grid, improve conversion efficiency side bus voltage performance. The layered control strategy introduced contains two layers: new inner layer micro-grid is maximized by maximum power tracking control, unit uses leveling ensure stability voltage; bidirectional vector decoupling includes current double closed loop d-q coordinate axis transformation...

Abstract Aiming at the problem that LCL filter is better than L, LC in filtering performance. However, selection of parameters more complicated, and it prone to resonant spikes process, this study introduces passive damping measure its suppression, combined with attenuation grid-connected harmonic current excellent Based on this, objective function model established, fish swarm algorithm adopted optimize parameters, simulation found MATLAB/Simulink. Its effect compared traditional method....

Electric interconnection is an essential trend for future large-scale development and utilization of renewable energy. China has proposed the concept Global Energy Interconnection to realize clean energy through power grids optimize allocation global resources. This study proposes Kazakhstan-China-Republic Korea networking scheme, analyzing characteristics supply demand in these countries. Based on regional economic analysis development, four schemes are utilizing UHVDC technology....

Two kinds of solar thermal power generation systems (trough and tower) are selected as the research objects. The life cycle assessment (LCA) method is used to make a systematic comprehensive environmental impact on trough tower generation. This paper mainly analyzes three stages materials, production transportation two generation, calculates unit energy consumption respectively, compares analysis results systems. At same time, Rankine compare efficiency

This article conducted a survey of the pastoral areas Naqu City, Tibet, Shigatse rural Linzhi and Heishui County, Sichuan. Due to basically same lifestyle, energy needs farmers herdsmen households are mainly used for cooking, heating, household appliances, but affected by different natural resources, climatic environments, geographical locations enjoyed regions, has led differences in proportion demand three aspects across there significant between Tibet Sichuan terms source methods.

This article has conducted relevant surveys on the current situation of energy use in rural areas Linzhi City, Tibet, and Heishui County, Sichuan. The survey results show that terms sources, fuelwood accounts for largest proportion accounting 72.2% to 74.7% use. Moreover, renewable is 4.5 times pastoral areas, 18 resource rich areas. In Sichuan Province, dried cow sheep dung main source, 79.8% total consumption. utilization rate daily life relatively low, only 0.3%.

In order to further promote the realization of "dual-carbon" goal, China will accelerate construction a new type power system with energy as main body and friendly interaction "source, network, load storage". The paper proposes method evaluate acceptance ability source, load, storage. Firstly, simulation model storage sensitivity is established based on active distribution network; then an evaluation network objectives maximizing acceptance, minimizing operation cost user satisfaction;...

A novel PV power inverter applied in micro-grid is developed this paper. It runs not only connected-grid but also disconnected-grid and keeps voltage stable rapidly transient process. When the connected with grid, produces as a current-source voltage-current close loop control strategy. Once islanding event takes place, it voltage-source, adopting virtual value outer-loop instantaneous inner-loop strategy fuzzy self-adjusting for PI parameters. Finally experimental results demonstrate...

The high-voltage general inverter which has the advantage of structure， become key equipment to saving energy in recent years. output current is variable overload protection, over protection and V/F control compensation, so real-time accurate measurement its RMS extremely important. In this paper, signals preprocess by hardware filter firstly, then find signal period waveform. Meanwhile, algorithm belong true category, suitable for testing harmonic signal, can avoid mean reduce computation...

The research on electrical energy alternative mainly focus potential, expanding strategy and benefit analysis due to lack of historical data. This paper presents the total spatial load forecasting model in distribution network based proposed development coefficient which is generated by electricity objective issued governments. To deal with fuzzy uncertain for electric boiler heater, cloud theory regularity process popularization are used. component presented sequence. method verified a typical case.

With the maturity of technologies, distributed generations were widely used in distribution networks and played an active role improving reliability power service, reducing supply cost, environmental pollution. By analyzing reliability, economy, environment-friendliness network with generations, a comprehensive evaluation model for generation interconnection scheme was established, based on which method objective optimizing aggregate utility proposed. The effectiveness this verified by...

Jilin Province, as an old industrial base in Northeast China, is also one of the regions with more new energy and renewable sources. How to adjust structure make it conducive revitalization economic development? At present, although economy Province on rise, still ranked lower country. revitalize glory eldest son Republic, carry out reform, full use only way, build environment-friendly The inevitable choice.

The sufficient actual big data analysis shows that wind speed has multi-scale amplitude & frequency modulation characteristics. There is an evident effect between the average and turbulence variance, also found with characteristic. intensity decreases in a certain range. However, when great degree, almost keeps stable. Simultaneously, both center have effect. increases key discussion was given for this characteristic resulting from cascade of turbulent energy transport. And instantaneous...

Flexibility makes output voltage-current curve of thin crystalline silicon solar cell’s photovoltaic (PV) array stair-stepping and corresponding power-voltage possessing non-uniform illumination characteristics, so existing conventional PV model is no more suitable it necessary to build a new mathematical that for flexibility condition. Based on engineering combining with series-parallel connection electric circuit, the under analyzed in detail derived theoretically can be expressed by...

Based on the development background and relevant theoretical knowledge of energy storage frequency modulation (ESFM) system, in view current application status ESFM system China, this paper takes auxiliary (FM) project based a power plant Guangdong as an example, analyzes security impact high-voltage transformer capacity, primary short circuit, FM function unit harmonic voltage at access point plant. The connected to grid is evaluated. Finally, control strategies are proposed.