本文選題：電能表　切入點(diǎn)：現(xiàn)場(chǎng)校驗(yàn)儀　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在電網(wǎng)的整體運(yùn)行中,電能計(jì)量管理工作是一項(xiàng)重要工作,電能計(jì)量工作的公平、公正、準(zhǔn)確與可靠,關(guān)系到供用電雙方的利益,現(xiàn)場(chǎng)校驗(yàn)儀正是開展這項(xiàng)工作的重要設(shè)備。PEC-H3A型設(shè)備是目前浙江省范圍內(nèi)所有外校班組都在使用的設(shè)備。本文研究它在實(shí)際中的應(yīng)用,改進(jìn)其使用中的功能局限性,使之更適用于地區(qū)特殊性校驗(yàn),更好保障計(jì)量裝置的準(zhǔn)確性、完成復(fù)雜接線檢查和錯(cuò)誤接線判斷、實(shí)現(xiàn)現(xiàn)場(chǎng)校驗(yàn)的自動(dòng)化。本文首先研究了現(xiàn)場(chǎng)校驗(yàn)儀在三相電路中的工作原理與技術(shù)標(biāo)準(zhǔn),基于最新的微處理器技術(shù)和數(shù)字信號(hào)處理技術(shù),分析了PEC-H3A型現(xiàn)場(chǎng)校驗(yàn)儀如何以直接交流采樣法實(shí)現(xiàn)工頻電參數(shù)測(cè)量,如何用電子式多功能標(biāo)準(zhǔn)表法完成計(jì)量裝置的綜合誤差測(cè)試,以及如何顯示完整的六角向量圖。然后重點(diǎn)從PEC-H3A型校驗(yàn)儀的軟件與硬件設(shè)計(jì)上進(jìn)行分析,針對(duì)實(shí)際工作中出現(xiàn)大諧波對(duì)電能表電壓的影響,引起設(shè)備切換電壓頻繁情況,和新上用戶無實(shí)際負(fù)荷導(dǎo)致現(xiàn)場(chǎng)校驗(yàn)無法判斷二次接線等情況,設(shè)計(jì)了寬范圍工作電源和放大變壓器空載電流值的電流采樣回路,最終實(shí)現(xiàn)了不同負(fù)荷的誤差測(cè)試和復(fù)雜的二次接線判斷。
[Abstract]:In the whole operation of the power network, the management of electric energy measurement is an important work. The work of energy measurement is fair, just, accurate and reliable, which is related to the interests of both the power supply and the power supply. The field calibrator is precisely the important equipment for this work. PEC-H3A is the equipment used by all the outer school teams in Zhejiang Province at present. This paper studies its application in practice and improves its function limitation in use. Make it more suitable for regional particularity check, better guarantee the accuracy of metering device, complete complex wiring inspection and wrong wiring judgment, This paper first studies the working principle and technical standard of field calibrator in three-phase circuit, based on the latest microprocessor technology and digital signal processing technology. This paper analyzes how to use direct AC sampling method to realize the measurement of power frequency electrical parameters, and how to use electronic multifunction standard meter to complete the comprehensive error test of measuring device. And how to display the complete hexagonal vector diagram. Then the software and hardware design of the PEC-H3A calibrator is analyzed, aiming at the influence of the large harmonics on the voltages of the watt-hour meter in the actual work, which results in the frequent switching voltage of the equipment. And the new user can not judge the secondary connection due to the lack of actual load, so the current sampling loop with wide range of working power supply and amplifier transformer no-load current value is designed. Finally, the error test of different loads and complex secondary wiring judgment are realized.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM933.4
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本文編號(hào)：1633956