需要金幣： 1000 個金幣 |
資料包括：完整論文 |  |
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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：16026 |  | |
| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘 要:隨著經(jīng)濟(jì)的發(fā)展，電網(wǎng)存在沖擊性負(fù)荷和非線性負(fù)荷大量增加，造成電網(wǎng)電壓波動，閃變，功率因數(shù)低下，因此需要對電網(wǎng)電能質(zhì)量進(jìn)行治理成為人們關(guān)注的問題，其中對電網(wǎng)無功補(bǔ)償顯得越來越重要。靜止無功發(fā)生器（SVG）能夠很好的補(bǔ)償電網(wǎng)中的無功分量成為改善電能質(zhì)量的一種手段。 本設(shè)計(jì)采用靜止的無功補(bǔ)償裝置（SVG），對380V低壓側(cè)電網(wǎng)進(jìn)行動態(tài)無功補(bǔ)償。本文首先對當(dāng)前國內(nèi)外的無功補(bǔ)償技術(shù)進(jìn)行了介紹和補(bǔ)償?shù)脑矸治?，在此基礎(chǔ)上，采用基于PLC的低壓動態(tài)無功補(bǔ)償控制系統(tǒng)(SVG) 。系統(tǒng)在硬件方面，采用與直接控制交流電容方案不同的功率單元投切控制，使系統(tǒng)控制更準(zhǔn)確，避免出現(xiàn)失誤。在軟件上，由于PLC抗干擾能力更強(qiáng)，反應(yīng)速度更快而采用PLC控制。該系統(tǒng)遵循模塊化設(shè)計(jì)，提高了通用性并易于以后的維護(hù)與升級，同時本文對無功補(bǔ)償技術(shù)進(jìn)行了總結(jié)和未來發(fā)展方向的思考。 關(guān)鍵詞：無功補(bǔ)償；PLC；SVG；功率單元
ABSTRACT:With the development of economy, increase the number of impact load and nonlinear load in power grid, cause the voltage fluctuation, flicker, low power factor, it is an urgent need for the power quality management, and to the power grid without power compensation becomes more and more important. As a means of improving power quality, without static var generator (SVG) can compensate the power grid's wattless component. No reactive power compensation device design using the static (SVG), low voltage side of 380V grid dynamic wattless power compensation. First introduced the domestic and foreign current wattless power compensation technology, principle of wattless power compensation is analyzed, on this basis, designed the control system of compensation of low-voltage dynamic wattless power based on PLC (SVG). In the aspect of hardware, the power unit switching control, compared with the direct exchange of capacitor switching control scheme is common, more accurate, avoid mistakes. In the software, control the use of PLC programming, anti-interference ability is stronger, faster. Follow the principles of modular design, improve the system's versatility and maintenance and upgrade easily later, thinking the wattless compensation techniques are summarized and the future development direction Key words :reactive compensation; PLC; SVG;Power unit |
