Due to the randomness and volatility of wind power, the problems of voltage fluctuation, harmonic and so on will have a serious impact on the power quality of power grid. (Which produces a voltage fluctuations, harmonics and other power quality problems will severely affected power grid.) The wind turbine...

Among the most developed renewable energy sources, wind energy attracts the most research attentions. Wind energy is easily captured far away from the places where wind energy is used. Because of this unique characteristic of the wind, the generation and delivery systems of the wind energy need to be...

High sulfur pet coke power generation through Integration Gasification Combined Cycle technology is discussed in this paper. Compared with coal, high sulfur pet coke has characteristics like high carbon content, high sulfur content, high heat value, low ash content and low volatile matter. IGCC power...

In order to study the impact of distributed generation (DG) in distribution network planning, a fuzzy programming approach is proposed. Triangular fuzzy numbers are used to describe the uncertainty of DG. Based on credibility theory, the network planning model is established. Fuzzy power flow is calculated,...

Based on risk assessment theory and "N-1" safety criteria, aiming at the situation of fault and power recovery in distribution system with distributed generation (DG), load bus loss and line overload and they comprehensive risk index are proposed to assess the risk degree of system, and find the vulnerable...

DC microgrid contains a large number of tightly regulated closed-loop converters, which performance for the constant power loads and may cause stability problem of bus voltage when used as a load since they trend to draw constant power. In order to improve the stability of DC microgrid, this paper proposes...

The promotion of electric vehicles (EVs) has eased the shortage of fossil fuels, but also brings challenges to the grid. Load modeling of EV is an important technical reserve to deal with the challenge. From practical application, this paper built the model of charging system consisting of voltage source...

Line loss rate is an important economic index of distribution network. In the paper, a new real-time three-phase line loss calculation method based on characteristic measurement is proposed for calculating the line loss of distribution network. The state characteristics of distribution network is measured...

Hubei-Henan transmission section is the first 1000kV/500kV/220kV three-level electromagnetic loop network in China and the most complex loop network in Hubei. According to the present situation of Hubei-Henan transmission section and Hubei-Hunan transmission section electromagnetic loop, the characteristics...

With the UHV power grid into a period of rapid development, bi-coupled electromagnetic loop network or even 1000kV/500kV/220kV tri-coupled electromagnetic loop network will be widely formed by the receiving end after UHV project landing. Changes in the structure and operation characteristics of grid...

Based on equal-area criterion, this paper analyzed in 220kV line single-phase reclosing time effect on the stability of power grid under different failure modes in theory. It also analyzed the optimal reclosing time period and the optimal reclosing time, and its validity is verified by simulation. Combining...

This paper researches the limit of Shanxi Datong power grid static stability, transmission capacity, security and stability of power grid characteristics under the serious fault by simulation after the commissioning of 500kV west channel. Then compared with the pre production, the importance and necessity...

The coordinating control of distributed power and smoothly grid-connected strategy is the key to well grid-connected. In this paper, a strategy of synchronous grid-connected control based on Kalman filter estimation is put forward. By calculating the difference between the previous and the present state,...

Active detection methods are mostly employed in existing islanding detections for grid connected renewable energy, but there might be non-detection zone in multi-PV system due to mutual interferences of the disturbance signals. In addition, traditional active methods may bring bad influences to power...

Electric vehicle (EV) charging stations based on the V2G (Vehicle to Grid) technology support bi-directional energy interaction between grid and electric vehicles. The energy flow from the grid will be injected into the battery when the battery needs to be charged. While the electric vehicle is in a...

This paper realizes cooperative modeling between intelligent substation and dispatch center based on IEC 61850 standard. The functions of the System Configuration Utility of Substation Automation System is regulated; The equipment and signal description in SCD file is regulated and expanded. The measuring...

This paper realizes direct communication between intelligent substation and dispatch center based on IEC61850 standard. An integrated information exchange system is established to achieve the above content. The communication uses Client/Server mode. An intelligent data gateway is used to integrate functions...

In this paper there are described the effects of the current and voltage variations' distortion on the three-phased power transformers; the methods of evaluating the additional power losses in the three-phased power transformers given by the harmonics and some records necessary for the evaluation and...

In order to build the transformer evaluation model both with objective laws and subjective initiatives, a transformer health status evaluation method is proposed based on association rules and analytic hierarchy process (AHP). By analyzing the degree of association of each individual transformer operation...

A deep peak load regulation compensation mechanism of thermal power units is presented to encourage the units to actively participate in peak load regulation and improve their peaking capability. The compensation mechanism consists of two sections. In the first section, the method of dividing basic peak...