Computer aided design (CAD) is used in the design of complete sets of electrical field is divided into mechanical CAD and professional electrical CAD (ECAD) phase. At present, most commercial ECAD software is based on the mechanical CAD software secondary development of products, on the one hand, keeping...

Physical connection between devices prone to failure in many applications. In the paper, energy coils and data coils are placed independently on the basis of electromagnetic resonant wireless power transmission technology, At the same time , resonant frequency of energy coils and data coils are designed...

Influence of electrical joint compound on electrical contact overheating energy consumption is studied in this paper. The high current test were made under different current(400A 600A 800A and 1000A). Aluminum-aluminum connections are selected to conduct contact resistance test and temperature rise test....

Influence on the feeder loss and voltage might be brought in with large-scale PV connected. It is important to find out the dynamic change law in thorough quantitative analysis. In this paper, the distribution of voltage on the feeder is calculated. Analytical expressions have been derived to determine...

In order to conform to the development trend, distributed generation came into being. Distributed generation accesses to distribution network, which has increased the burden of the distribution network. One the one hand, distributed generation’s accessing position is changeable and accessing capacity...

For power transmission equipment long-term planning in the steady-state failure isn’t suitable for using to predict the reliability of the short-term problems, according to the result in transmission equipment shut down three different reasons: overload protection action, the weather factor, aging failure,...

Three-phase imbalance is one of the power quality problems which is more attention for distribution network especially rural distribution network. In this paper, the power loss due to three-phase imbalance was studied, and the loss quantification method of three-phase imbalance was deduced, the energy...

The traditional grid-connected inverter (GCI) has the disadvantage of high total harmonic distortion under the condition of unbalanced and distorted grid voltage. On this basis, a novel GCI control strategy is proposed in this paper. Firstly, a second order generalized integrator is built in the coordinate...

Distribution network fault automatic location system is to solve the problem in the shortest possible time to find fault point, and the purpose is to develop a set of automatic and efficient fault point accurately addressing system. After the failure of a very short period of time, through the control...

A weak line identification method of energy consumption, which is suitable to the 10kV distribution network, is proposed. First, clearly put forward six loss indexes of 10kV distribution network, so as to build a distribution network weak line index system. Second, on the basis of six indexes, divide...

The leakproofness of the submarine cable gland is of very high requirement, the traditional leakproof method can hardly meet the requirement more or less. In this paper, by researching the interference leakproof structure, we creatively applied the elastic leakproof ring into the submarine cable gland....

The effect of T4, T6, T77 and T73 ageing treatments on microstructure and stress corrosion cracking of an Al-4.2Zn-1.6Mg alloy was investigated. TEM study revealed that there is no phase on the matrix or grain boundary in the T4 sample, and the precipitates on the grain boundaries of the T6 sample were...

Using piezoelectric elements to harvest energy from ambient vibrations has been of great interest over the past few years. This paper presents a two-stage adaptive boost converter with low-voltage starter for low voltage piezoelectric energy harvester. The adaptive technique can deal with a range of...

As wind energy is widely used nowadays, it is more and more important to predict wind turbine downtime and organize maintenance just in time. Two types of data systems have been widely adopted for monitoring wind turbine condition: supervisory control and data acquisition (SCADA) and condition monitoring...

The randomness and volatility of photovoltaic (PV) output brings difficulties to do real-time forecast. This paper proposed a new method called EMD-SVM-GA to forecast PV output real-time. Three steps were needed to carry out the method. Firstly, decompose historical PV output data sequence into several...

The low thermal conductivity of phase change material (PCM) is the main resistance of heat transfer in latent storage system. Characterization of melting process in a PCM-based heat sink with plate fin type thermal conductivity enhancers is numerically studied in this paper. Detailed parametric investigations...

According to the problem of the soil thermal imbalance occurring in the ground-source heat pump system, a new kind of ground-source heat pump system with complementary functions is established. This system can be applied in different climate areas through rational controlling strategies. In the study,...

A new and simple distance relaying algorithm based on KVL for series compensated transmission lines is discussed in this paper. The fault impedance can be calculated accurately by solving the 3-order fault loop equations consisting of fault phase voltage, current, the differential and integral of current....

Distribution networks can emerge long-time over-voltage due to ferroresonance caused by the electromagnetic voltage transformer saturation under a certain condition, seriously impacting the secure operation of power system. Some distribution networks used 4TV method to restrain ferroresonance and achieved...