本文關(guān)鍵詞：一種面向負(fù)荷建模的現(xiàn)場數(shù)據(jù)采集記錄裝置的研制　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 負(fù)荷建模 數(shù)據(jù)采集 時鐘同步 信號調(diào)理

【摘要】：由于目前缺乏可以準(zhǔn)確模擬電力系統(tǒng)實(shí)際負(fù)荷特性的有效負(fù)荷模型,使得當(dāng)下電力系統(tǒng)數(shù)字仿真所使用的負(fù)荷模型的精度仍然較為粗糙,以至于在全國電網(wǎng)互聯(lián)背景下的電力系統(tǒng)數(shù)字仿真的研究結(jié)果的準(zhǔn)確性難以得到保障。因此,現(xiàn)如今負(fù)荷模型精度的不足已經(jīng)嚴(yán)重的制約了我國電力工業(yè)的進(jìn)一步發(fā)展。然而,由于總體測辨法是目前最為有效負(fù)荷建模方法,研制面向這種建模方法的現(xiàn)場數(shù)據(jù)采集記錄裝置使其可以為負(fù)荷建模提供充足的高精度輸入樣本數(shù)據(jù),以此來推動負(fù)荷建模技術(shù)逐步趨于完善,對于保障未來我國電力事業(yè)持續(xù)、健康發(fā)展有著重要的實(shí)際意義。因此,本文針對總體測辨法的實(shí)際應(yīng)用需求,致力于研制一套可用于常規(guī)變電站現(xiàn)場的數(shù)據(jù)采集記錄裝置,以達(dá)到為負(fù)荷建模前期準(zhǔn)備工作,即海量高精度現(xiàn)場實(shí)測樣本數(shù)據(jù)的獲取工作提供高可靠性系統(tǒng)級解決方案的研究目的。其中主要研究內(nèi)容有如下幾點(diǎn):1)針對常規(guī)式變電站二次系統(tǒng)的組成結(jié)構(gòu)以及接口特性,在分析了目前負(fù)荷建模常用電力系統(tǒng)現(xiàn)場數(shù)據(jù)采集裝置的系統(tǒng)設(shè)計方法以及性能需求的基礎(chǔ)上,本文提出了一種可用于常規(guī)變電站母線電氣量數(shù)據(jù)采集的新型現(xiàn)場數(shù)據(jù)采集記錄裝置的設(shè)計實(shí)現(xiàn)方法,并詳細(xì)闡述了該方法下裝置內(nèi)部具體核心功能模塊的工作原理和數(shù)據(jù)流處理流程。最后通過探討上述方法中各項(xiàng)關(guān)鍵技術(shù)的實(shí)現(xiàn)方法,論證了以上方法在本文裝置研制方案中實(shí)施可行性。2)通過技術(shù)指標(biāo)評估,本課題確立了裝置實(shí)測樣本數(shù)據(jù)在其幅值誤差5%,相移誤差5°,總諧波失真1%的前提下,以差分方程來表述負(fù)荷模型使用相應(yīng)的優(yōu)化算法開展負(fù)荷建模,其建模所得模型的負(fù)荷特性吻合度誤差可以控制在10%以內(nèi)。因此,針對這一系列技術(shù)指標(biāo)的要求,結(jié)合電力系統(tǒng)現(xiàn)場數(shù)據(jù)采集記錄裝置的基本功能需求,本文設(shè)計并實(shí)現(xiàn)了一整套包含前端信號調(diào)理電路、模擬抗混疊濾波器、數(shù)據(jù)采集卡、光電轉(zhuǎn)換電路、GPS信號接收機(jī)、時鐘同步主控單元、電平轉(zhuǎn)換電路及裝置配套電源等八大硬件主要組成部分在內(nèi)的可適用于常規(guī)變電站的現(xiàn)場數(shù)據(jù)采集記錄硬件電路平臺,為后文裝置配套軟件的設(shè)計開發(fā)提供了有力的技術(shù)支撐。3)針對變電站現(xiàn)場時鐘同步方法,結(jié)合已實(shí)現(xiàn)的裝置硬件平臺的具體特性,本文進(jìn)一步的研究了IRIG-B碼、GPS等電力系統(tǒng)常用的時鐘同步方式的軟件解碼、同步方式自適應(yīng)切換策略、時標(biāo)上傳及數(shù)據(jù)采樣控制等裝置底層軟件設(shè)計中關(guān)鍵技術(shù)細(xì)節(jié)的軟件實(shí)現(xiàn)方法。并最終利用Verilog硬件描述語言將上述技術(shù)方法逐一實(shí)現(xiàn)并整合,在具體整合過程中,不僅優(yōu)化了寄存器配置還對相關(guān)的具體功能邏輯進(jìn)行了時序約束,提升了裝置配套底層軟件的時鐘同步可靠性和數(shù)據(jù)采樣控制過程的軟件工作效率。4)針對負(fù)荷建模對于電網(wǎng)系統(tǒng)掉電壓故障這一擾動數(shù)據(jù)類型具有較高參數(shù)靈敏度的技術(shù)特點(diǎn),本文進(jìn)一步研究了基于越界保護(hù)判據(jù)法的裝置配套上層軟件相關(guān)的編程設(shè)計方法。其中具體涉及到PCI總線驅(qū)動接口調(diào)用、數(shù)據(jù)采集事件觸發(fā)量監(jiān)控與管理、基于數(shù)據(jù)庫操作的數(shù)據(jù)緩沖池的實(shí)現(xiàn)、RS-232串口軟件系統(tǒng)校時、基于越界保護(hù)法的數(shù)據(jù)有效性判定、存儲功能模塊調(diào)用及特定數(shù)據(jù)格式輸出等。通過逐一實(shí)現(xiàn)上述軟件功能,最終本文裝置具備了對外輸出帶有時標(biāo)的負(fù)荷端口實(shí)測擾動數(shù)據(jù)的核心基本功能。5)在裝置配套軟、硬件研發(fā)工作完成后,為了進(jìn)一步測試裝置整機(jī)性能,本文利用ADPSS平臺、TIMER-007、便攜式服務(wù)器等實(shí)驗(yàn)室現(xiàn)有的試驗(yàn)儀器設(shè)備模擬常規(guī)式變電站實(shí)際工況環(huán)境搭建了相應(yīng)的仿真測試環(huán)境。繼而通過在便攜式服務(wù)器上搭建IEEE電力系統(tǒng)14節(jié)點(diǎn)仿真接線圖,并將其作為仿真任務(wù)提交至ADPSS平臺開展數(shù)字仿真,從而得到輸出與常規(guī)式變電站二次系統(tǒng)相同電壓等級的模擬電氣量信號。接著利用本文所研制的裝置開展數(shù)據(jù)采集工作并通過對裝置實(shí)測數(shù)據(jù)進(jìn)行指標(biāo)精度評估,本文得出了該裝置主要技術(shù)指標(biāo)特性為:幅值誤差均值5%,、相位誤差均值0.3°、總諧波失真0.13%;與此同時,通過對單相故障、兩相故障等典型數(shù)據(jù)開展負(fù)荷建模試驗(yàn),本文還得出了上述典型算例下,以裝置實(shí)測故障數(shù)據(jù)作為輸入樣本數(shù)據(jù)來開展負(fù)荷建模試驗(yàn)所得模型的負(fù)荷特性吻合度誤差7.5%滿足了課題甲方單位的項(xiàng)目驗(yàn)收標(biāo)準(zhǔn)。最后,綜合以上測試結(jié)論,本文得出了本課題所研制的“面向負(fù)荷建模的現(xiàn)場數(shù)據(jù)采集記錄裝置”不僅具備為負(fù)荷建模計算提供有效輸入樣本數(shù)據(jù)的實(shí)用資質(zhì),而且還具有實(shí)測數(shù)據(jù)精度高、可靠性好、易操作易使用等主要技術(shù)特點(diǎn)。
[Abstract]:Due to the lack of effective load model can accurately simulate the actual load characteristics of power system, the load model used in the current power system digital simulation precision is still relatively rough, so that the accuracy of power system simulation in the interconnected power system under the background of the research results is difficult to guarantee. Therefore, now the lack of accuracy of the load model has seriously restrict the further development of China's power industry. However, because the measurement method is the most effective method of load modeling, development of field data acquisition and recording device for this kind of modeling method which can provide high precision input plenty of sample data for load modeling, load modeling technology in order to promote gradually perfect, to ensure the future of China's power industry, has important practical significance to the healthy development. Therefore, this paper The measurement method of the actual application needs, committed to the development of a data collecting recording device for conventional substation, in order to achieve the load modeling of the preparatory work, the work of the massive acquisition of high precision measurement data provide objective high reliability of the system level solutions. The main contents are as follows structure: 1) for the two system of conventional substation and interface characteristics, based on the analysis of the current system design method of field data acquisition device used in power system load modeling and performance requirements, this paper put forward a method for realizing the design of conventional substation busbar electric quantity data acquisition model field data acquisition and recording the device, and expounds the working principle and process of data stream processing and the method under the device within a specific core function module. Through the discussion of the design method of the key technology in the above method, the feasibility of the implementation of the.2 method developed in this paper demonstrates the above device scheme through technical evaluation index), this paper established the device measured data in its amplitude error 5%, phase shift error of 5 degrees, 1% of the total harmonic distortion of the premise, by taking the difference equations of load model using the corresponding optimization algorithm of load modeling, the load characteristics of the models with error can be controlled within 10%. Therefore, in this series of technical requirements, combined with the basic functional requirements of field data acquisition and recording equipment in power system, this paper designs and implements the front-end signal conditioning circuit includes a set of analog anti aliasing filter, data acquisition card, photoelectric conversion circuit, GPS signal receiver clock synchronization, the main control unit, level conversion circuit and power supply device The eight main hardware part, can be used in the field of conventional substation data acquisition hardware platform, provides strong technical support for the design and development of the.3 device software) for substation clock synchronization method, combined with the specific characteristics of the hardware platform has been realized, this paper further studies the IRIG-B code, commonly used software decoding method of clock synchronization of GPS power system, adaptive synchronization mode switching strategy, time scale and upload data sampling control method to realize the details of key technologies in the design of device driver software software. And finally the use of Verilog hardware description language to realize one by one and the technical method of integration, in particular in the process of integration, not only optimize the configuration register of timing constraints on specific functions are logically related, improve the supporting software of the device Sampling control.4 software efficiency process of clock synchronization and data reliability) for load modeling for power system voltage drop for this type of fault disturbance data technology is high sensitivity, this paper further studies the design method of software programming set related device based on the method of cross-border protection criterion. In particular to a PCI bus driver the interface, data acquisition and management of event triggered monitoring, data buffer pool database operation based on RS-232 serial software system of the school, determine the validity of cross-border protection method based on data storage function module calls and specific data format output. By realizing the functions of the software, the final device has a load port the measured output with time scale perturbation of the basic functions of the core.5 data) in the device supporting soft, hardware R & D work After the completion, in order to further test the performance of device, using ADPSS platform, TIMER-007 server, portable laboratory test equipment existing in conventional analog substation actual working environment simulation test environment. Then through the corresponding portable server build IEEE 14 node power system simulation diagram, and as simulation the task submitted to the ADPSS platform to carry out digital simulation to get the analog electrical signals of the same voltage level of two times the system output and the conventional substation. Then use the device developed in this paper to carry out data collection and the indicators to assess the accuracy of device data, this paper concludes that the main technical indicators of characteristics of the device is that the amplitude error of mean 5%, the mean phase error of 0.3 degrees, the total harmonic distortion is 0.13%; at the same time, based on the single-phase fault, two-phase fault code etc. Carry out the test data of load modeling, this paper also made the typical example, the actual fault data as the load device to carry out load modeling tests of the model input sample data to fit 7.5% error meet the acceptance criteria for the project. The project party units, the above test results, this paper draws the subject developed "for load modeling field data acquisition and recording device not only has to load modeling calculation to provide effective input data and practical qualifications, but also has the data of high precision, good reliability, easy to operate and easy to use features.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM63;TP274.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 鞠平,李德豐;電力系統(tǒng)綜合負(fù)荷模型的辨識方法研究[J];電力系統(tǒng)自動化;1997年08期

2 趙自剛,趙春雷;國產(chǎn)故障錄波器現(xiàn)狀分析及新型錄波器展望[J];電網(wǎng)技術(shù);1999年03期

，

本文編號：1435741