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As people's water consumption become large and large in china, people begin to expect high requirements of water quality. However, some waterworks' monitoring system cannot automatically detect and process water quality parameters and system operation status. Therefore, staffs have to manual meter reading. The paper first discusses the design of the whole system, including the server side and the...
AES encryption algorithm and digital signal processing (DSP) technology are used in image encryption transmission system to make sure the information security and confidentiality in this paper. The basic principles, structure of the algorithm and design skills are introduced and analyzed. The program design is realized in DSP environment. An overall scheme of the image encryption transmission system...
In this paper, the design process of Three Phase Network Parameter Monitoring System is analyzed and the overall research scheme and design idea of the system are expounded. This paper mainly studies how to improve the accuracy of input voltage and current. The front-end voltage decreasing, current dropping circuit and remote data transmission circuit are designed. The programs of the data acquisition...
Owing to the complexity of the photovoltaic system structure and their environment, especially under the partial shadows environment, the output characteristics of photovoltaic arrays are greatly affected. Under the partial shadows environment, power-voltage (P-V) characteristics curve is of multi-peak. This makes that it is a difficult task to track the actual maximum power point. In addition, most...
To implement the informatization management of water supply pipe network, the paper introduces the general design of a wireless monitoring system for water supply pipe network based on ARM and GPRS technology, including the implement of the hardware and software of the monitor terminal. The monitor terminal was designed based on LPC2210 MPU and could collect the data of supply pipe network such as...
This paper proposes a design about sewage-source Heat Pump - Remote Monitoring System based on Web access internet configuration software. The main purpose of this design is to achieve the remote monitoring device parameters, and provide data reference for a comprehensive evaluation of technical indicators of Sewage source heat pump system. The article analyzes the process flow of sewage source heat...
A Versatile simulation model for photovoltaic array is developed based on the DC physical model of photovoltaic (PV) module under PSIM environment. The I-V, P-V characteristics of photovoltaic array with different combinations can be simulated by the model. In addition, the model includes the function of Maximum Power Point Tracking (MPPT) and completes the simulation of the perturbation and observation...
A research on differences of latest Grid Code requirements for wind farm integration between China and selected EU countries are conducted. The similarities and differences of these Grid Codes in the aspects of active power/frequency control, reactive power/voltage control and fault ride-through capability are compared. The main causes of these differences are investigated and the author tried to...
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