Fundamental frequency and instantaneous phase of the grid voltage are the critical information for the operation of the grid-connected power generating systems.A novel strong tracking filter(STF) based real-time extraction method of the single-phase grid voltage fundamental phase was proposed.The grid voltage fundamental frequency and DC offset were added as two of the state variables,and the nonlinear state space description of the single-phase voltage signal contaminated by DC offset and harmonics was established.Considering the extended Kalman filter(EKF) can’t fast track the system parameters mutation when the system reaches a steady state,STF was introduced to estimate the state variables to get the fundamental frequency,amplitude and phase of the single-phase grid voltage signal in real-time.Experimental results prove the proposed phase real-time extracting method can eliminate the impact of DC offset and fast track the power parameters mutation.

DC bias

Frequency grid

Three-phase

Source

Cite

Citations (1)

Triboelectric Nanogenerators Powered Hydrogen Production System Using MoS₂/Ti₃C₂ as Catalysts

Advanced Functional Materials (2024)

Xianggang Dai Xiaobo Wu Yao Bo-yuan Zhanyong Hong Tao Jiang

Abstract Hydrogen energy is an alternative to carbon‐based fuels due to its zero pollution and high energy density. The electrolysis of water, driven by triboelectric nanogenerators (TENGs), is considered as a promising green method for hydrogen production. 2D transition metal carbides/nitrides can be used as catalyst carriers, through interface engineering to prepare molybdenum disulfide/titanium dioxide (MoS 2 /Ti 3 C 2 ) composites for accelerating the kinetics of hydrogen evolution reaction (HER). In this work, a multilayered rotating TENG (MR‐TENG) is designed to convert rotating mechanical energy into electrical energy for constructing a self‐powered hydrogen production system. MoS 2 /Ti 3 C 2 composites are utilized as electrodes for electrolyzing water, which can enhance the catalytic activity in the HER. The output performance of the MR‐TENG and its managed charging performance when integrating with a constant voltage power management module are investigated. Besides the application demonstrations of powering a digital thermometer, an anemometer, and a commercial incandescent lamp, the power‐managed MR‐TENG is applied to generate electricity for water electrolysis, and realize a hydrogen evolution rate of 7.1 mL min −1 at the rotation speed of 90 rpm. This work provides an effective approach to the self‐powered production of high‐purity green hydrogen based on renewable blue energy utilization with important industrial application prospects.

10.1002/adfm.202406188

Cite

Citations (5)

Synthesis of PtAu/TiO2 nanowires with carbon skin as highly active and highly stable electrocatalyst for oxygen reduction reaction

Electrochimica Acta (2018)

Xiaoting Deng Shaofeng Yin Xiaobo Wu Min Sun Zhiyong Xie

Electrospinning

10.1016/j.electacta.2018.06.139

Cite

Citations (30)

Carbon composite coatings on Ti for corrosion protection as bipolar plates of proton exchange membrane fuel cells

Micro & Nano Letters (2018)

Pingping Gao Zhiyong Xie Chun Ouyng Xiaobo Wu Ting Lei

A highly corrosion resistant and conductive composite coating on Ti bipolar plates was prepared by the hydrothermal and impregnation method. The composite coating consisted of amorphous carbon immersed in suspension solution [polytetrafluoroethylene (PTFE) 10 wt.% + TiN nanoparticles 3 g/l]. The surface of coating was completely smooth and nano‐holes on the surface of coatings were filled by PTFE and TiN particles. TiN particles were uniformly distributed in the coating when 0.1 mol/l of glucose was used as carbon source. The composite coating exhibited excellent conductivity and corrosion resistivity. It was revealed that corrosion current density, interfacial contact resistance, and contact angle were 0.009 µA/cm 2 , 13 mΩ cm 2 , and 115.53°, respectively. Meanwhile, it was shown that the corrosion current density of the coating was below 1 µA/cm 2 with a potentiostatic polarisation test (0.6 and −0.1 V). In summary, the Ti substrate with a carbon composite film immersed in suspension solution showed a great potential application in bipolar plates of proton exchange membrane fuel cells.

Carbon fibers

10.1049/mnl.2018.0076

Cite

Citations (18)