随着电力的广泛使用，市场对电能的需求量日渐增加，而且对电能质量和配电网

随着电力的广泛使用，市场对电能的需求量日渐增加，而且对电能质量和配电网供电可靠性、安全性的要求也越来越苛刻。电力用户需要有高品质、高可靠性的电能来保证其用电设备的正常、稳定运行。然而，随着现代科学技术的发展，一方面，由于电力电子设备在配电网中的大规模应用，已严重影响到了电能的品质；另一方面，由于精密用电设备的使用的越来越多，这就对配电系统提出了更高的要求，使其必须提供与之相适应的高品质、高可靠性的电能。并且，随着电力需求越来越大，电力系统容量不断增加，电力系统对电力调度自动化水平和供电可靠性的要求越来越高。因此要对配电网的运行参数进行实时监测，然后根据监测的数据来分析电网运行的质量，保证电力供应，预防由于供电质量而引起的用电设备故障，实现电力调度的自动化。
为了改善和解决配电网电能质量和配电可靠性的问题，提高电力调度自动化水平，一方面要采取各种可能的技术手段，抑制配电网电能质量的恶化；另一方面我们还应该在配电网系统中安装一些监测装置，监测配电网中各项电能参数。因为只有准确、及时地监测配电网中的各个指标，然后对其分析后才能找出电能质量和电力调度存在的问题，进而找到处理问题的方法。因此，要对配电网的多个电力参数进行监测。配电网参数监测对于实现配电网电能的自动化调度以及保证配电网安全、可靠运行具有十分重大的意义。
本设计选用的是TMS320LF2407型号的DSP芯片。系统的硬件电路主要包括：三相电压电流互感模块、滤波抗混叠模块、信号放大模块、电压提升模块等几个部分。可测量的电压范围为0V~380V，可测量的电流范围为0A~20A。系统的软件部分主要包括：A/D转换模块、FFT算法模块、定时器模块、数据处理模块等几个部分。本系统主要以数字信号处理技术为基础，利用其谐波分析功能，对配电网的各项参数进行计算和监测。同时采用灵活、准确的数字信号处理程序，使配电网各项参数的监测更符合实时化、数字化的发展趋势。使用快速傅立叶变换(FFT)技术进行谐波分析，得到各次谐波的相角和幅值。通过应用这些数字技术，能比较准确的测出配电网中的各次谐波，进而计算出各种配电网参数的数值，这些参数主要包括：电压有效值、电流有效值、有功功率、无功功率、视在功率、功率因数等。
具体的工作有以下几点：
(1)根据待测的配电网参数，确定测量方法和计算方法，进行整体方案设计。
(2)进行基于LMS320LF2407的系统硬件设计。
(3)进行系统的软件设计编程，然后进行仿真和调试。
(4)进行整个系统的测试。

結果 (英文) 1:

With the widespread use of electric power, increased market demand for energy is growing, and for power quality and distribution networks electricity supply reliability, security requirements have become more stringent. Power users need to have high quality and high reliability of electricity to ensure the normal and stable operation of power equipment. However, with the development of modern science and technology, on the one hand, due to large scale application of power electronic devices in distribution network, has seriously affected the quality of electric power on the other, because precision equipment used more and more, this distribution system put forward higher requirements, so that it must be provided with suitable high quality and high reliability of electric energy. And, as electricity demand is growing, increasing power system capacity, level of power system dispatching automation of electric power and reliability requirements getting higher and higher. Real-time monitoring of the operating parameters of the distribution network, and operation of monitoring data to analyze network quality, guaranteed power supply to prevent electrical equipment due to power failure, power dispatch automation.In order to improve the reliability and solve power quality and distribution problems, raise the level of dispatching automation of electric power, on the one hand you want to take every possible technical means, restrain power quality deterioration; the other hand we have some monitoring devices should be installed in a distribution system, the power parameter monitoring distribution network. Because the only accurate and timely monitoring of each index in the distribution network, then analyses in order to identify power quality and electrical problems in scheduling, and then find a way to deal with problems. Therefore, you want to monitor multiple power parameter of the distribution. Parameters monitoring of distribution network for the realization of power distribution network automation scheduling and to ensure safe and reliable operation of distribution network is of great importance.This design choice is TMS320LF2407 type of DSP chips. System hardware include: three-phase voltage and current transformer module, anti-aliasing filter module, amplifier modules, voltage-boosting module sections. Measurable voltage in the range of 0V~380V, current that can be measured in the range of 0A~20A. The software part of the system include: a/d conversion module, FFT algorithm modules, the timer module, data processing and other sections. The system is based on digital signal processing technology, making use of its harmonic analysis, calculation of the parameters of the distribution network and monitors. And adopt a flexible and accurate digital signal processing procedures, enable more real-time monitoring of distribution parameters, digital trends. Using the fast Fourier transform (FFT) techniques for harmonics analysis, phase angle and amplitude of each harmonic. Through these technologies, can accurately measure harmonics in power distribution network, then calculate numerical parameters of distribution network, these parameters include: voltage RMS, current RMS, active power, reactive power, apparent power and power factor.Specific tasks are the following:(1) according to the parameters of distribution network to be tested and determine the methods of measurement and calculation methods, and overall design.(2) hardware design based on LMS320LF2407.(3) system software design and programming and emulation and debugging.(4) the testing of the whole system.

結果 (英文) 3:

With the wide use of power, the demand for power supply is increasing, and the power quality and the reliability and safety of the distribution network are becoming more and more demanding.. Electric power users need to have high quality and high reliability of power to ensure the normal operation of its power equipment. However, with the development of modern science and technology, on the one hand, due to the large-scale application of power electronic devices in distribution network, has seriously affected the quality of electric energy; on the other hand, because of the precision with the use of electric equipment of more and more, which on the distribution system proposed higher requirements the must be provided with suitable high-quality,High reliability power. And, with the increasing demand for power, the power system capacity is increasing, and the power system has higher requirements for power dispatching automation and reliability.. So to operating parameters of the distribution network real-time monitoring, then according to the monitoring data to analyze the quality of power grid operation, to ensure the supply of electricity, prevent caused due to the quality of power supply in electric equipments, power dispatching automation. In order to improve the power quality and distribution reliability of power distribution network, improve the automation level of power dispatching, and take all kinds of possible technical means.,It can restrain the deterioration of power quality of distribution network. On the other hand, we should install some monitoring device in the distribution network system to monitor the power parameters of the distribution network.. Because only the accurate and timely monitoring of the indexes in the distribution network can be found, the problem of power quality and power dispatch can be found out, and the method of dealing with the problem is found.. Therefore, the power parameters of the distribution network monitoring. Distribution network parameter monitoring is of great significance for the realization of the distribution network power dispatching and the guarantee of the distribution network security and reliability..
This design selects the TMS320LF2407 model DSP chip.The hardware circuit of the system mainly includes: three phase voltage current transformer module, filter anti aliasing module, signal amplifying module, voltage boost module and so on.. The measurable voltage range is 0V~380V, and the measurable current range is 0A~20A. The software of the system mainly includes: A/D conversion module, FFT algorithm module, timer module, data processing module and so on.. This system is based on the technology of digital signal processing, the function of its harmonic analysis, and the parameters of the distribution network are calculated and monitored.. At the same time, flexible and accurate digital signal processing program,The monitoring of the distribution network parameters is in line with the trend of real time and digital.. Using a fast Fu Liye transform (FFT) technique for harmonic analysis, the harmonic amplitude and phase angle. Through the application of the digital technology, can accurately detect various harmonics in distribution network are calculated, and then the values of all kinds of power parameters, these parameters mainly include: effective value of voltage, current, active power, reactive power, power, power factor, etc.. The concrete work of the following points:
(1) according to the distribution network parameters, determine the measurement method and the calculation method, the overall scheme design.
(2) the hardware design of the system based on LMS320LF2407.
(3) the software design of the system is programmed, and then simulation and debug. (4) the test of the whole system.