电能质量监测仪设计

【作者】 徐勇；

【导师】 王孝良；

【作者基本信息】 大连理工大学 ， 控制理论与控制工程， 2004， 硕士

【摘要】 电能质量监测仪是一种用于监测电网运行状态的的工业仪表。它能实时提供电压、电流、有功功率、无功功率、频率等电能质量的基本参数，而且能对电力系统的谐波、三相电压不平衡度、电压波动和闪变等电能质量指标进行分析，为电力部门对电能质量的监测提供了强有力的支持。 本电能质量监测仪主要是以数字信号处理技术为核心，采用更灵活、更准确的数字信号处理算法进行数据运算，并且使用了新的数据处理方法，实现了对电能质量各种指标的精确计算和分析，减少了硬件成本，使电能质量监测更符合数字化技术发展的需要。 该监测系统采用了TI公司的16位定点DSP芯片TMS320LF2407A、电压和电流精密互感器、抗混叠滤波电路、六通道同时采样的高速A／D转换器ADS7864、键盘、图形液晶显示器、RS—232串行通讯接口等，硬件成本低，简便易用。更多还原

【Abstract】 The power quality monitor is a kind of measuring instrument monitoring the operation state of electric power in industry, which can provide the basis parameters of power quality such as voltage, electric current, active power, reactive power and frequency, and moreover, can analyze the indexes of power quality such as power harmonic, three-phase voltage asymmetry and grid harmonic voltage fluctuation and flicker for the fake of providing the better support for Electric Power department monitoring power quality.In order to calculate and analyze accurately the indexes of power quality, this power quality monitor is according to the core of digital signal processing technology mostly, adopts the more agile and accurate arithmetic of digital signal processing and moreover uses the new dada processing methods, which can reduce the hardware cost and accord with the requirement of digital technology development.The monitor system is made by the 16-bit fixed-point DSP TMS320LF2407A , the precise potential transformers and current transformers, anti-alias filter, 6-channel simultaneous sampling analog-to-digital converter ADS7864, keyboard, graphics LCD , RS-232 interface etc, which is cheap in cost and easy to control.更多还原