【摘要】：配電網(wǎng)節(jié)點數(shù)量眾多,網(wǎng)絡范圍大,線路之間的跨越、交叉等現(xiàn)象普遍,不利于大面積配置傳統(tǒng)的相量測量裝置,對全網(wǎng)的廣域測量有一定限制。目前國內(nèi)外對配電網(wǎng)同步相量測量系統(tǒng)的研究主要集中在理論分析和小范圍試驗階段,真正投入電網(wǎng)實際應用的還較少。因此,研制適用于配電網(wǎng)的新型同步相量測量裝置具有切實意義。文章首先對同步相量測量技術在配電網(wǎng)的應用及需求進行了分析和討論,提出了應用于配電網(wǎng)的微型化相量測量單元(PMU Mini)的設計方案;其次根據(jù)規(guī)劃方案,對系統(tǒng)的硬件電路設計、軟件功能設計進行了詳細介紹,在總體結構設計完成之后研制出了測量裝置實物,并在硬件平臺上進行了相關試驗和測試;最后對設計的合理性、功能實現(xiàn)和有待改進的地方等進行了分析和討論。微型化相量測量單元的主控芯片選用當下流行的Cortex-M3內(nèi)核微處理器STM32F103ZET6,并外擴了1M字節(jié)的SDRAM用于數(shù)據(jù)緩存。模數(shù)轉(zhuǎn)換器使用16位高性能同步采樣芯片AD7606,由STM32自身發(fā)出的PWM波觸發(fā)采樣,采集數(shù)據(jù)則保存在SD卡中。GPS/北斗雙模定位模塊的同步時鐘脈沖(PPS)信號直接控制PWM波的最初啟動,是實現(xiàn)數(shù)據(jù)同步采樣的原始信號。此外,裝置配備電容式觸摸屏總成,用于測量參數(shù)輸入和工作狀態(tài)實時顯示;具有232、485通信接口和925MHz無線通信模塊;通過Micro USB接口直流5V供電。文章設計的相量測量單元具有一些鮮明特點:通過觸摸屏操作,人機交互方便;AD7606采樣板卡有4、6和8通道三款規(guī)格,可以靈活搭配實現(xiàn)多種通道數(shù)據(jù)采集;具有本地數(shù)據(jù)存儲、有線數(shù)據(jù)傳輸和無線組網(wǎng)功能。PMU Mini對常規(guī)PMU的硬件結構和軟件功能進行了大力度精簡,是一款微型化、部署靈活、價格低廉的數(shù)據(jù)同步采集系統(tǒng)。
[Abstract]:The large number of nodes in the distribution network, the wide range of the network, the crossing between the lines and the common phenomenon are not conducive to the installation of traditional phasor measurement devices in large areas, and has some limitations on the wide area measurement of the whole network. At present, the research on the synchronous phasor measurement system of distribution network at home and abroad is mainly focused on the theoretical analysis and the small-scale test stage, and the actual application of the system is still few. Therefore, it is of practical significance to develop a new type of synchronous phasor measurement device for distribution network. Firstly, the application and demand of synchronous phasor measurement technology in distribution network are analyzed and discussed, and the design scheme of miniature phasor measurement unit (PMU Mini) used in distribution network is put forward. Secondly, according to the planning scheme, the hardware circuit design and software function design of the system are introduced in detail. After the overall structure design is completed, the measurement device is developed, and the related experiments and tests are carried out on the hardware platform. Finally, the rationality of the design, the realization of function and the place to be improved are analyzed and discussed. The main control chip of the miniaturized phasor measurement unit selects the popular Cortex-M3 kernel microprocessor STM32F103ZET6, and expands the SDRAM of 1m bytes for data cache. Analog-to-digital converters use a 16-bit, high-performance synchronous sampling chip, AD7606, to trigger sampling by PWM waves emitted by the STM32 itself. The synchronous clock pulse (PPS) signal of GPS / Beidou dual-mode positioning module directly controls the initial start of PWM wave, which is the original signal to realize the synchronous sampling of data. In addition, the device is equipped with capacitive touch screen assembly for measuring parameter input and real-time display of working status; it has 232485 communication interface and 925MHz wireless communication module; and it is powered by DC 5V through Micro USB interface. The phasor measurement unit designed in this paper has some distinct characteristics: through touch screen operation, human-computer interaction is convenient; AD7606 sampling board has 4, 6 and 8 channels three specifications, can flexibly match to realize a variety of channel data acquisition; PMU Mini has the functions of local data storage, wired data transmission and wireless networking. PMU is a miniaturized, flexible and low-cost synchronous data acquisition system, which greatly simplifies the hardware structure and software functions of conventional PMU.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM930

【參考文獻】

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本文編號：2440014