This paper proposed a method for perameter setting of traditional nonlinear extended state observer using Back-Propagation neural network .This method simplified the complicated nonlinear extended state observer parameter setting process. This paper simulated the active disturbance-rejection control...

Accompanying with many flexible AC transmission system(FACTS) devices put into operation, the safety and reliability of power system operation have been suffering more serious influence and unprecedented challenge. Moreover, it's always difficult to comprehensively and accurately analyze the impacts...

The paper analyzes the current power system harmonic estimation algorithms which have a considerable number of shortages. In order to improve detection precision and reduce the computational complexity, we can combine the ESPRIT algorithm with improved PASTd algorithm, consequently, achieve the rapid...

Lightning fault is the main fault of transmission line. Accurate and effective diagnosis of lightning fault can effectively improve the reliability level of transmission line. At present, the determination of lightning strike fault and the location of the lightning strike are determined by manually inquiring...

Using fault current limiter (FCL) is an effective way to solve the problem that short circuit current exceeds the standard. How to quickly identify short circuit faults is one of the keys. Thus, this paper presented a fast identification method for short circuit fault based on the average curvature of...

Oscillating voltage is an effective method for PD detection in XLPE cable. In this paper, it mainly described the principle of oscillating waveform test system (OWTS) for PD detection and proposed the peak-correlation method for the location of partial discharge points. Then, an oscillating waveform...

A novel multi-channel wavelength demultiplexer (WDM) consisting of metal-insulator-metal waveguides and asymmetrically coupled nanodisk resonators is designed and simulated. The results show the WDM can export any single mode while undesirable modes are suppressed.

The operation of distribution network will be greatly affected when distributed generation (DG) is accessed to the network. The degree of influence is closely related to the location and capacity of distributed generation. Therefore, it is of great significance to evaluate the consequence of installing...

This is Part II of a two-part paper which presents a methodology for fault location and isolation and service restoration (FLISR) for power distribution grids. The Criterion 1 discussed in Part I is adapted to locate faults when distributed generations (DGs) exist. For DGs with larger capacity, faults...

Current and voltage measurements play an important role in the power industry and provide necessary information for power systems to measure, control, and relay protection. At present in the national 110 KV, 110 KV, 330 KV, 750 KV power grid has been fully tested by optical current transformer, at the...

This paper proposes a novel reactive power dynamic monitoring and auto-compensation system for rural distribution network. The proposed system employs advanced reactive power measurement, Data Transfer Unit (DTU) and hybrid network communication. The technology based on Internet and General Packet Radio...

The steady accuracy of output waveforms is a core index for judging the performance of DC-DC converter and it is mainly determined by the control scheme of DC-DC converter. This paper studied a PWM current hysteresis control scheme to improve the performance of the high step-up current-fed DC-DC converter...

When rectifier station of LCC-HVDC has power fluctuations running at large load, AC filters controlled in groups at rectifier station are switched frequently. That problem potentially has impact on service life of corresponding circuit breaker and threatens the safe operation of the DC system. In this...

This paper analyzes the problems in the process network configuration of smart substation. A method for automatic configuration of process layer network in smart substation based on SDN is proposed. First, establish a physical port model that defines the configuration information for the process layer...

A unified frequency-domain approach to analyze Neimark-Sacker bifurcations and flip bifurcations of discrete-time systems with multiple time-delays in the linear feed-forward and the nonlinear term is presented. The technique relies on the harmonic balance approach (HBA) and feedback systems theory....

Aiming at the problem of short-term load forecasting in power system, this paper propose a load prediction method based on multiple proportions smoothing method. We perform multiple linear regression analysis and partial correlation analysis on the load with respect to the weather, and found the meteorological...

Three-piece can is also known as SPTE three-piece can. Due to the whole can being composed of can body, bottom and cap, it is called three-piece can. It is the common metal container used in food, beverage and other industries. Three-piece can making technology has been applied and developed for almost...

With distributed generation access to the grid, power quality problems become increasingly prominent. These problems can threaten the safe and stable operation of the power grid. This paper establishes a distributed power quality comprehensive evaluation system. The improved entropy method is used to...

With the wide application of modular multilevel converters (MMC) in high voltage and high power areas, many open loop methods are proposed for MMC. However, the stability of MMC open loop control system has not been solved so far. Aim at this problem, on the base of Lyapunov theory and persistently and...

As a kind of fluid, the motion of vacuum arc is complicated and various. Its structure and distribution have a significant effect on vacuum interrupters' comprehensive properties. A method to analyze of arc flow field's dynamic feature based on optical flow is proposed aiming at complicated flow field...

Cloud computing is one of the key enablers for modern electric power dispatch systems, in which many assisted decision making applications are involved. This work focuses on one important decision making scenario, i.e., providing suggested actions for alarming signals from electric component in both...

Accurate estimation of state of charge (SOC) in power battery is the key point of electric vehicle management system. In this paper, the problem of accurate estimate of the SOC for lithium battery is considered. The composite model of the battery is established, and the parameters of the model are identified...

In this paper, we use the knowledge of the three elements method to analyze the steady-state and transient conditions of three-phase short-circuit current. The method combine actual power system conditions with the circuit subject knowledge. Compared with the traditional solution of three-phase short...

In electric vehicles (EVs), the lithium-ion battery is used as the main energy storage because of its large capacity and high power density. The traditional battery management system (BMS) simply measures battery voltage and current. Most battery damage is caused by failure of the battery's sensor or...

The rectifier group is an important equipment for the electrolytic aluminum rectification system. The valve short circuit and valve breakdown failure, which would cause serious accidents, often happened. The sensitivity of the existing arc protection action is affected by the fault position, and the...

According to the problem of the optimization of overall performance of idle spectrum assignment for cognitive radio, it proposed a spectrum assignment method for cognitive radio based on binary weed algorithm. Considering maximizing total network efficiency and fair effectiveness as a criterion, the...