In order to improve the response speed of magneto rheological (MR) damper, the system is in need of a fast response driving power supply. Firstly, response characteristics of the MR damper was analyzed. Secondly, according to the basic principle of electromagnetic response, the design of the control...

To enhance the defense capability of information security in smart grid and protect the data exchange between intranet and external information network, a kind of safety device has been produced that achieved effective control of information network data access. On the basis of the company 's multi-channel...

The servo control technique is one of the key technologies in the field of control like robots. In order to meet the demands of servo control for robots, a DSP based DC servo motor control system was developed. Firstly, this paper promoted the design of controller and analyzed the overall structure and...

In order to solve the problem that the decision-making department’s orderly power utilization plan is less elaborate, a model based on users’ typical daily load curve is presented. The model can coordinate a variety of orderly power utilization means, and targets at power company’ lowest economy cost...

Due to new energy resources, including wind energy storage has been well into the grid, power dispatch and distribution of the operation process involves large-scale, multi type, highly complex data, which contains real-time data, planned data, early warning and monitoring data, environmental data. At...

Distribution system is the section to deliver power energy to end user and realize power consumption, which draws more and more attentions. In the daily life of system operation and control for smart distribution system, the system operators heavily rely on Geographic Information System (GIS). Traditional...

Combined with the traditional Empirical Mode Decomposition(EMD),Ensemble Empirical Mode Decomposition(EEMD) and Complementary Ensemble Empirical Mode Decomposition(CEEMD) method, in view of the modal confusing problems, proposed an improved algorithm based on EEMD, and expounds the calculation and realization...

The forecast accuracy of the wind power directly affects the operating cost of the network system, which is directly related to the supply and demand balance grid. Therefore, the forecast accuracy of wind power is very important. Considering the prediction accuracy not high, we propose an improved predictive...

By DeST simulation software to build a residential construction in Inner Mongolia autonomous region, on the basis of without thermal insulation layer, one by one, change the retaining structure of exterior wall, roof, Windows and window wall ratio, build heat load value when simulating the factors changed,...

The photovoltaic (PV) power surges with varied with sunlight intensity and temperature, resulting in great fluctuation of power on the side of synchronization on AC busbar micro-grid. Configuring an energy storage system may allow that the grid output is fallen into a specified interval for the purpose...

This paper has designed a new type of coupling disc structure for the diesel generator set, eliminating the “seams” in the section die. It also has focused on the modal analysis by using limited meta-simulation software, discussed the optimum stiffness structure, and analyzed the related causes of normal...

This paper Application introduces a complete system level solution to drive a BLDC Motor for cordless power tools. To show the efficiency, present a thermal solution for a power stage with SMD MOSFETs and show how to implement the control with the microcontroller to drive a BLDC motor equipped with 3...

Through the analysis of urban rail transit train traction energy consumption system, the main influencing factor of the traction energy consumption can be determined, but its incomplete information, which is a typical grey system. This article according to grey relation theory, establish a urban rail...

Condition monitoring of substation equipment plays an important role for the safe and stable operation of power grid, aiming at the insufficient of existing condition monitoring system, a practical substation equipment condition monitoring integrated system is designed which adopts J2EE technology, SOA...

The stability of the output voltage of the ebw's stable high voltage power is a prerequisite to ensure the quality of ebw. To solve this problem, an ebw high voltage stable power control system is designed. Main principle is that the new type of pwm-cuk converter structure is combined with coupled inductor,...

This paper considers two-path multiple-input multiple-output (MIMO) relay systems in which the inter-relay interference (IRI) between two relay nodes leads to a degradation of the system performance. In this paper, we study the use of beamforming techniques to resolve the problem of IRI. To suppress...

Based on the necessity and feasibility of implementation of Energy Control Center in colleges and universities, taking Beijing Normal University as an example, it introduces the design concept and technical architecture of the Energy Control Center, describes function modules, construction contents and...

In order to improve power quality and ensure stable operation of power system, shunt active power filter (SAPF) is widely used o filter out harmonics. This paper proposed an improved control method for SAPF. The whole improved control strategy could be divided into two parts: Ip-Iq current detection...

The purpose for research on cogging effect is to improve thrust fluctuation of PMLSM. As one of the main affecting factors of linear motor, its cogging effect is firstly researched and analyzed in this paper. And then we use finite element analysis software to perform the simulation so as to show that...

This paper focuses on analyzing the harmonics of electromagnetic forces and torques of a magnetically levitated planar motor by measuring these forces and torques. By a multi-dimension force/torque sensor measure system, all electromagnetic forces and torques of a planar motor are measured simultaneously....

Evolvable Hardware can be used to design circuits automatically. The main difficulty of applying real-world applications is its scalability. This paper focuses on improving the scalability of combinational logic circuit evolutionary design. We proposed a complex circuit design method combined Generalized...

As the international maritime organization made mandatory for ship's atmospheric emission pollution control requirements in MARPOL6 convention in 2013, shore-side power technology applications in the domestic and foreign port can realize the effective control of atmospheric pollution to ships berthing...

In order to improve the reliability of distribution network operation, this paper proposes a method that through adjusting the distributed power output to reduce the closing loop current. Mainly by regulating the operation state of the distributed power to change the power flow distribution, reduce the...

The tunability on the refractive index of the liquid crystals makes the photonic crystal optical switch possible, which comprises liquid crystal materials. In this article, based on the light induced alignment of liquid crystals and the self-collimation effect in the photonic crystals, an all-optical...

Electrical properties, thermal stability and flammability are the important properties of insulating material in the high voltage metal-enclosed switchgear, which can affect the insulation fault of switchgear. With the development of new composite materials, it has a revolutionary impact on the switchgear...

The geological disaster data warehouse is constructed by Power Desinger16.1, with the theme as the geological disaster analysis and evaluation, and with the multisource isomerism source data of geological disaster. Through the way of Model-driven Architecture, use reverse engineering technology to extract...

For the complexity of actual product structure, the three dimensional electric field finite element model of KYN-40.5kV high voltage metal enclosed switchgear was built and analyzed by using subarea modeling and partial thinning mesh. The calculation results show the distribution of the internal electric...

In the modern electric power system,power systems expand day by day in China.More and more large capacity generators with fast control excitation systems are put into operation.Along with the introduction of the competition mechanism by power marketing,the possibility of operating at the edge of stability...

The structure and working principle of steering column-power type electricpower steering (EPS) system were introduced. The control strategy and assist characteristics of EPS system were designed based on brushless DC motor. Torque control strategy of power steering motor was designed based on the research...

In order to solve the problem that different types of wind turbines accessing to the power gird has great influence on protection configuration and setting calculation, a fault current calculation model of doubly-fed induction generator under rotor excitation control was established when symmetric or...

As a direct power supply to the distribution network user side, the photovoltaic power generation has a positive effect on reducing line loss of distribution network. However the loss reduction of PV power is conditional. The photovoltaic power installation location and the generating capacityboth affect...

As partial discharge (PD) can reflect the type of insulation defects in a gas insulated switchgear (GIS) and the damage of GIS caused by different types of discharge varies evidently, identifying the type of discharge correctly is of significant value in ensuring the safe and reliable operation, assessing...

On the basis of the ship engine room noise analysis, the paper discusses the application of the noise power generation technology in ship engine rooms. According to the available research results about acoustoelectric conversion, it puts forward that the reasonable distribution and installation of noise...

Approach presents an intelligent inspection system for transmission line based on GIS(Geographic Information System). The construction principle, system structure and function of the intelligent inspection system are introduced in detail. The basic idea of the system is to embed GIS handheld intelligent...

Aiming at the problem that under the condition of multi grid-connection inverters, the dilution effect can easily cause islanding detection failure of Sandia Frequency Shift (SFS) method, a new phase locked loop based composite islanding detection strategy for multi grid-connected inverters is proposed....

This paper introduces the configuration and operation principle of the hydraulic in-wheel motor drive system for heavy truck. According to the regenerative braking function of the system, the distribution algorithm of braking force is proposed and a regenerative braking control strategy is developed...

This paper introduces the basic principle of Boost circuit topology and photovoltaic maximum power point tracking technology.According to the characteristics of photovoltaic cells output nonlinearity, this paper designs a fuzzy-PID controller to track the maximum power point of PV cell. The controller...

Transmission line pulse (TLP) is a useful tool in immunity test of electrostatic discharge (ESD). The pulse width and rising time of TLP waveform is the key point of the anti-static interference test. A TLP generator is built based on the principle of TLP. The generator is used to test and analyze influences...

This paper presents a dynamic simulation test method of transformer protection based on Advanced Digital Power System Simulator, ADPSS. Firstly, a simulation model of three-phase three-winding transformer has been proposed in ETSDAC, a commercial electromagnetic transient simulation program. Then, according...

Normally, transformer overloading capacity is calculated using method in guide for loading mineral-oil-immersed transformers. However, the method is not so accurate for every transformer. Therefore, a modified BP neural network based on transformer overloading calculation model is proposed. With BP neural...

In the present study, new conductive and anti-corrosion coating which is suitable for grounding grid with a carbon-based conductive filler was investigated. This study determined using epoxy resin as a film forming binder, multi-walled carbon nanotubes as conductive filler, KH550 as the preferred coupling...

In recent years, the wind power industry in China developed rapidly, by the people's attention. The development of wind power has brought us considerable economic benefits and significant social benefits, but also to the stability of power system has brought a significant impact. Low voltage ride through...

In this paper, in the neglect of the core of the magnetic hysteresis, eddy current effect and the core skin effect and based on the analysis and summary of previous experience, an analytical method to determine the parameters of the transformer's turn to turn short circuit fault is improved and perfected...

This paper researches HVDC operating characteristics and its sensitive factors of islanding system based on JinSu UHVDC in China. Several factors such as water hammer effect coefficient, parameter of governor, load model, DC frequency controller, power system operation mode and stability control measure...

The feature extraction and pattern recognition of partial discharge signal are key steps of equipment condition assessment and fault diagnosis. Time-frequency analysis on PD pulse can make up for deficiencies of traditional phase statistical method by extracting more comprehensive and effective information...

The core loss test is an common-used method to diagnose the core fault of large turbo generator. However, it takes a lot of time to connect cables before and disconnect cables after the power-on test using traditional operational approach. To make the core loss test more convenient to conduct, a new...

In a photovoltaic (PV) system that consists of multiple series-connected PV modules with bypass diode, multiple peak points could exist in the P-V curve of the PV system under partially shaded conditions (PSC), causing conventional MPPT methods sometimes unable to track the true global maximum power...

The power system application of the infrared thermal imager is introduced in this article. By analyzing the special requirements of power system applications, several important performance parameters of the infrared thermal are summed up. This paper presents a more comprehensive calibration test method...

Due to the characteristics of the operation of the wind turbine and the capacity of the converter and the rotor current and other factors, the use of wind turbine to adjust the system frequency and voltage can not fully meet the requirements. And energy storage equipment has the advantages of flexible...

The application of Distributed Generation (DG) reduces the consumption of traditional energy, but it also brings certain challenge to relay protection because of its own characteristics. This paper analyzes that the injection or branching current will cause incorrect operation of over current protection....

This paper presents a new adaptive overcurrent protection for distribution network with high penetration rate DG. The equivalent impedance of DG is calculated by fault components during fault transient state, and works as the premise for protection configuration. The principle and the configuration method...

Based on the experimental research and numerical calculation of the Contra-Rotating Wind Turbine (CRWT) by using the technique of the aero-engine and propeller, the effect of the tip speed ratio of the rear stage on the performance of the contra-rotating wind turbine is studied by using numerical simulation...

According to the specific environmental noise of the detection system, via holes was caused impedance discontinuities, parasite capacity and inductance which resulted in signal reflection and attenuation, and hence deterioration of signal integrity(SI). The new idea was put in the paper, the specific...

Fuel cell is attracted much attention as an efficient power, low-pollution means of generating electrical power. In this paper, the fuel cell power generation system problems are described in detail, and expounding on the principle of single battery, power system working principle, characteristics, and...

Combined with the actual situation, this paper presents a program of optimizing substation control panel lighting- using LED bulbs. Using LED lighting not only saves energy, but also save the maintenance or replacement of lighting equipment required manpower costs. At the same time, it is very friendly...

To low transmission power loss, maintain voltage stability and improve voltage profile, a novel multi-agent-based voltage control scheme is proposed in this paper by dynamically adapt configuration of control devices, including the automatic voltage regulator of generator, transformer with under-load...

In order to improve the efficiency of the Photovoltaic (PV) system. Firstly, Solar Cell Array (SCA) model was established, and the simulation analysis of which was conducted through MATLAB/Simulink, then, the output characteristic curves of PV system with different external environment condition were...

In order to assess the reliability of circuit breaker more scientificly and effectively, a method based on improved fuzzy analytic hierarchy process and genetic algorithm is presented in this paper. Firstly circuit breaker fault tree is established according to analyzing the circuit breaker failures...

In order to improve the capacity of DC-DC converter, a large-capacity DC-DC converter with input-series-input-parallel output-series-output-parallel (ISIPOSOP) connection is proposed in this paper. The converter consisting of multiple basic DC-DC modules has the ability to withstand the high voltage...

In this paper, finite element analysis is used to analyze the torque of Permanent Magnet Synchronous Motor (PMSM) of electric vehicle. Firstly, a 2D model of the PMSM is made. By forming magnetic field lines and flux density distribution of the PMSM with no-load condition, the accuracy of the model can...

In order to simplify the generation of phase-shifting waveform and reduce the range of phase angle, an angel-fixed method to generate the phase-shifting waveform is presented in this paper. Firstly, it studies the advantages and the topology structure of the bi-directional full-bridge DC-DC converter,...

In order to improve the flexibility and make energy transmissing between power system and distributed generators more efficient, a double-input single-output DC-DC converter based on the topology of push-pull modular multilevel DC converter is presented in this paper. First, it selects the topology structure...

Electrical vehicle has low emissions, high efficiency and other merits. In this paper, an efficient charging device program based on constant current-constant voltage charging, PFC, and Dual Closed-Loop control is proposed. Firstly, at the beginning of the charging stage, constant current charging method...

Direct starting method of asynchronous motor does a lot harm such as current surge and mechanical shock, etc . In order to reduce the harmful influence of direct starting method and improve the starting performance of asynchronous motor, a scheme of asynchronous motor soft starting system based on antiparallel...

The access of Ultra-High Voltage (UHV) line must have a great impact on security and stability of power grid. In this paper, to access a 1000kV UHAC line to a power grid, the stability and security of power grid are analyzed and a sensitivity method is proposed to solve the problem of threshold-crossing...

Power-tapping from ground wire is an ideal method to power on-line monitoring devices of HV overhead transmission line. And the way with bus-like power-tapping coil plays an important role for its simple engineering and excellent lightning protection performance. The key to the PTC way is whether enough...

In order to improve the ultrasonic test penetration in the concrete members, a kind of high-power ultrasonic pulser-receiver was designed. With the instantaneous high-voltage pulse by capacitor of charging and discharging, the transformed voltage can reach a peak of 800v. A specific receiver was designed...

Unmanned amphibious platform (UAP in short) is a complex nonlinear system. It shows plenty of dynamic properties, such as parameter uncertainty and large time-lag, when controlled, which hinders the development of the approaches of exactly course tracking. Motivated by adaptive fuzzy sliding mode control...

Aimed at temporary grounding wire detection problems in distribution network, some factors influence the detection precision, on this basis, an electromagnetic transient simulation model for temporary grounding wire detection was established based on PSCAD/EMTDC platform, the model simulates the actual...

In distribution automation systems, transformer terminal unit (TTU) which, as a basic unit was distribution measurement and control equipment and was installed in branched distribution box of power basement and communicated with power main station through the communication network. Its performance determined...

Due to large-scale wind farms connected to the grid, so when the grid computing need to consider the impact of wind farm integrated into the power grid. Paper firstly analyzes the model individual wind turbine. Analysis of the resistance Crowbar access to wind turbine model and the number of wind turbines...

The energy storage system (ESS) with isolated bidirectional DC/DC converter based on parameter adaptive fuzzy PI control method is proposed to realize the low voltage ride through (LVRT) of the double fed wind power generation system. Firstly, the mathematical model of doubly fed wind power generation...

This paper firstly analyzes the problems in the existing micro-grid protection. Then, the paper puts forwards a new method for micro-grid protection judgment and fault location. By using the communication system, the over-current protection device can satisfy the protection-requirements of alternative...