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In Constant speed constant frequency (CSCF) AC power supply system, generator output constant frequency and constant voltage AC power by connecting engine with constant speed transmission device (CSD). However, CSCF has many disadvantages, such as complex structure, heavy weight, high cost and low energy conversion efficiency. By eliminating CSD in CSCF and taking output voltage and output frequency...
In this paper, a novel three-port converter(TPC) for stand-alone photovoltaic(PV) power system application is proposed, and also presents the control strategy and power management of this converter. This converter uses three power switches, two inductors and switched capacitor structure to obtain a higher voltage gain and reduce the voltage stress of the power switches. The control for the converter...
A highly integrated and reconfigurable microgrid testbed is presented in this paper. The microgrid testbed contains various distributed generation units and diverse energy storage systems. Apart from electrical power, it can also provide energy in forms of hydrogen and thermal energy. The topology of this testbed is very flexible with different combinations of buses and feeders. The deployment of...
More electric aircraft (MEA) is using more electrical power on board and the stability analysis of the aircraft electric power system (AEPS) becomes more important. This paper presents a modeling study and stability analysis of the EPS for MEA. Averaging technique is used to model the aircraft EPS, which includes a generator, an autotransformer rectifier and an inverter-motor load. The proposed model...
The variable frequency power supply system has advantages of energy saving and light weighting. With its application in the new aircraft, DC distribution system is becoming important direction of more or all electric aircraft in the future. More constant frequency load will be supplied with DC main bus by inverter. Aircraft electric power system operation may suffer from large signal disturbances,...
With the development of smart home, the amount of household electricity loads is greatly increasing. How to effectively control these loads has been one of the most important issues in the research of smart home system. Keeping the total electricity loads under limitation would ensure the safety of users' electricity consumption. However, limiting the amount of electricity load or simply cutting the...
Microgrid technology, becoming the main application form of distributed generation with high permeability, can effectively alleviate the impacts on large power grid of distributed generation. Microgrid system, as the carrier of microgrid control strategy, can provide verification platform for the research of microgrid control strategy. In this paper, an integrated microgrid system with flexible structure...
Active power filter is an advanced power electronic device, which can be used for integrated compensating harmonics and improving power quality. A shunt active power filter using for three-phase four-wire system is introduced in this paper. The basic operation principles and structure are analyzed. This paper proposes the design of a shunt active power filter, which can be used under the condition...
The concept and sorts of motion controller were introduced in this paper, the features of PMAC motion controller was explained, and the make-up of the numerical control system based on MINI-PMAC, PC and AC servo driver was discussed in detail including hardware structure and software designing. Then a development example of experiment was shown. Servo compute and control in the CNC system are both...
To provide a test facility for possible demonstrations of advanced distributed generation system integration strategies, a single-phase laboratory-scale Microgrid system is set up. Two distributed generators are included in this microgrid, a photovoltaic simulator and a wind turbine simulator. Both of them are connected to the AC grid via flexible power electronic interface respectively. For stable...
The paper mainly analyzes the Nordex N43/600 wind power system based on an investigation of wind farm. Wind turbine's structure and parameters are introduced. It also introduces the electric control system through the following aspects: The eletricity circuit, the grade of voltage, the parameters which are measured or controled, the main controller and the soft connection control module. Finally it...
This paper introduced the GPS/GPRS-based remote electronic monitoring and calibration system, as well as its working principle and system framework. Then the hardware structure and software designing of vehicle mounted unit were introduced. Next, we emphasize testing the reliability and speed of communications while refreshing the data of ECU through GPRS. As a conclusion, it quickly implements the...
This paper mainly introduces the application of Sunway ForceControl configuration software in the vehicle gasohol delivery system, and explains the hardware system structure and software implement. The system regards Sunway ForceControl configuration software as the development tools for host computer software. The vehicle gasohol delivery system can be monitored and controlled by host computer by...
This paper first introduces the topology of three-phase PWM voltage source rectifier (VSR). Then the mathematical models in three-phase static and two-phase rotary coordinate system are built. Based on that theory and the voltage-oriented vector control's idea, the paper introduces a dual-channel closed-loop control strategy with current-inner-loop and voltage-outer-loop. Active power channel is aim...
To overcome the shortcomings of the traditional manual stretching stress relaxation testing machine for the steel wire, a scheme of automatic control system with ADAM modules was proposed. The program compiled by Visual Basic programming language on IPC controlled the whole test process and recorded test data automatically. For the test data analysis, the extrapolating method of single and dual logarithm...
Because the Vehicle Gasohol has the merit of low pollution and energy saving, it is extensively spread in recent years. This paper introduced the design scheme and implementation process of an accurate fuel delivery automation control system in an oil store-plant. A centralized control scheme is adopted in this system, where a C200HX series OMRON PLC works as its central controller, communicates with...
A supervisory and control system for oil tanks area based on PLC S7-300 and configuration software Force-Control is introduced in this paper. The hardware structure of the system and the software design are both described in detail. In this system, Superior computers communicate with PLC through Industrial Ethernet. The superior computers system adopts duplex redundancy and the PLC adopts software...
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