外文翻譯--風光互補發(fā)電系統(tǒng)

1、<p><b>　　風光互補發(fā)電系統(tǒng)</b></p><p>　　在當今世界人們對電的依賴越來越強。在遠離電網(wǎng)的地區(qū), 獨立供電系統(tǒng)就成為人們最需要的電源, 需要低成本、高可靠性的獨立電源系統(tǒng)。在此種環(huán)境下風光互補供電系統(tǒng)較為合理, 因為現(xiàn)代能源服務尚不能達到的地方往往是盆藏著豐富風能和太陽能資源的地方。而且風、光互補系統(tǒng)本身獨有的一些性質也恰好與這些地區(qū)的自然條件相吻合。因此對于

2、滿足偏遠地區(qū)能源需要和中國最貧困地區(qū)的可持續(xù)發(fā)展, 風光互補發(fā)電是一項關鍵的能源建設技術手段。風光互補供電系統(tǒng)是由太陽能電池與風力發(fā)電機發(fā)電, 經(jīng)蓄電池貯能, 給負載供電的一種新型電源, 目前廣泛應用于徽波通信、基站、電臺、野外活動、高速公路、無電山區(qū)、村莊和海島.</p><p>　　偏遠地區(qū)一般用電負荷都不大, 所以用電網(wǎng)送電就不經(jīng)濟, 在當?shù)刂苯影l(fā)電最常用的就是采用柴油發(fā)電機。但柴油的儲運對偏遠地區(qū)成本太高

3、, 所以柴油發(fā)電機只能作為一種短時的應急電源。要解決長期穩(wěn)定可靠的供電問題, 只能依賴當?shù)氐淖匀荒茉?。太陽能和風能是最普遍的</p><p>　　自然資源, 也是取之不盡的可再生能源。太陽能是地球上一切能源之源, 太陽照射著地球的每一片土地。風能是太陽能在地球表面的另外一種表現(xiàn)形式, 由于地球表面的不同形態(tài)如沙土地面、植被地面和水面對太陽光照的吸熱系數(shù)不同, 在地球表面形成溫差, 地表空氣的溫度不同形成空氣對流而

4、產(chǎn)生風能。我國西部地區(qū)是世界上最大也是世界上最豐富的太陽能資源地區(qū)之一, 尤其是西藏地區(qū), 空氣稀薄, 透明度高年日照時間長達3400h, 每天日照6h以上年平均天數(shù)在275~330天之間, 輻射強度大, 年均輻射總量7000MJ/m,地呈東向西遞增分布,呈峰型變化, 資源優(yōu)勢得天獨厚, 應用前景十分廣闊。我國風能資源豐富儲量3200GW, 可開發(fā)的裝機容量約253GW, 居世界首位與可開發(fā)的水電裝機容量380GW為同一級。2005年我

5、國風電裝機容量超過1GW,2020年風能發(fā)電規(guī)模預計達30GW。未來風能電能很可能成為和太陽能比肩的新能源行業(yè)。我國風能開發(fā)利用的潛力很大,屬于風能資源可利用區(qū)。特別是太陽能與風能在時間上和地城上都有很強的互補性。白天太陽光最強時, 風很小, 晚上太陽落山后, 光照很弱, 但由于地表溫差變</p><p>　　光電系統(tǒng)是利用光電板將太陽能轉換成電能, 通過控制器對蓄電池充電, 再通過逆變器對用電設備供電的一套系統(tǒng)

6、。該系統(tǒng)的優(yōu)點是供電可靠性高, 運行維護成本低,但是系統(tǒng)造價高。風電系統(tǒng)是利用小型風力發(fā)電機, 將風能轉換成電能, 通過控制器對蓄電池充電, 再通過逆變器對用電設備供電的一套系統(tǒng)。該系統(tǒng)的優(yōu)點是發(fā)電較大, 系統(tǒng)造價較低, 運行維護成本低。缺點是小型風力發(fā)電機可靠性低。風電和光電系統(tǒng)都存在由于資源的不確定性導致發(fā)電</p><p>　　與用電負荷的不平衡問題, 風電和光電系統(tǒng)都必須通過蓄電池儲能才能穩(wěn)定供電, 但每

7、天的發(fā)電要受天氣的影響很大，會導致系統(tǒng)的蓄電池組長期處于虧電狀態(tài), 這也是引起蓄電池組使用壽命降低的主要原因。由于太陽能與風能的互補性強, 風光互補發(fā)電系統(tǒng)在資源上彌補了風電和光電獨立系統(tǒng)在資源上的缺陷。同時, 風電和光電系統(tǒng)在蓄電池組和逆變環(huán)節(jié)是可以通用的, 所以風光互補發(fā)電系統(tǒng)的造價可以降低, 系統(tǒng)成本趨于合理。太陽能電池可以將光能轉換成電能。它將太陽能電池組件與風力發(fā)電機有機地配合組成一個系統(tǒng), 可充分發(fā)揮各自的特性和優(yōu)勢, 最大

8、限度的利用好大自然踢予的風能和太陽能。對于用電大、用電要求高, 而風能資源和太陽能資源又較豐富的地區(qū), 風光互補供電無疑是一種最佳選擇。風光互補發(fā)電系統(tǒng)可以根據(jù)用戶的用電負荷情況和資源條件進行系統(tǒng)容的合理配里, 即可保證系統(tǒng)供電的可靠性, 又可降低發(fā)電系統(tǒng)的造價。無論是怎樣的環(huán)境和怎樣的用電要求, 風光互補發(fā)電系統(tǒng)都可做出最優(yōu)化的系統(tǒng)設計方案來滿足用電的要求。應該說, 風光互補發(fā)電系統(tǒng)是最合理的獨立電源系統(tǒng)。目前, 推廣風光互補發(fā)電系統(tǒng)

9、的最大障礙是小型風力發(fā)電機的可靠性問題。</p><p>　　幾十年來, 小型風力發(fā)電機技術有了很大的發(fā)展, 產(chǎn)業(yè)發(fā)展也取得了一定的成就, 但從根本上說, 可靠性問題一直沒有得到解決。長期以來, 出于成本的考慮, 先進的液壓控制技術沒有在小型風力發(fā)電機的限速保護上采用,只是采用簡單的機械控制方式進行限速保護。機械限速結構的特點是小型風機的機頭或某個部件處在自然條件下,由于風速和風向的變化太復雜, 而且自然環(huán)境惡劣

10、, 不可避免的會引起振動和活動部件的損壞, 從而使機組損壞。要徹底解決小型風力發(fā)電機的可靠性問題必須在限速方式上有最好的解決方法。風光互補發(fā)電系統(tǒng)可以根據(jù)用電負荷情況和資源條件進行系統(tǒng)容的合理配置, 即可保證系統(tǒng)供電的可靠性,又可降低發(fā)電系統(tǒng)的造價。無論是怎樣的環(huán)境和怎樣的用電要求, 風光互補發(fā)電系統(tǒng)都可做出最優(yōu)化的系統(tǒng)設計方案來滿足要求。應該說, 風光互補發(fā)電系統(tǒng)是最合理的獨立電源系統(tǒng)。</p><p>　　風

11、光互補發(fā)電系統(tǒng)由太陽能光電板、小型風力發(fā)電機組、系統(tǒng)控制器、蓄電池組和逆變器等幾部分組成, 發(fā)電系統(tǒng)各部件容的合理配對保證發(fā)電系統(tǒng)的可靠性非常重要。一般來說, 系統(tǒng)配里應考慮以下兩方面因素。用電負荷的特征要了解用電的最大負荷和平均日用電。最大用電負</p><p>　　荷是選擇系統(tǒng)逆變器容的依據(jù), 而平均日用電量則是選擇風機及光電板容和蓄電池組容的依據(jù)。太陽能和風能的資源狀況太陽能和風能的資源狀況是系統(tǒng)光電板和風

12、機容量選擇的依據(jù), 根據(jù)資源狀況來確定光電板和風機的容, 再按日用電考慮容量系數(shù), 最后審定光電板和風機的容量。</p><p>　　大風限速保護是風機輸人的能量大于系統(tǒng)當時所能消耗的能以及系統(tǒng)所能儲存的能量總和的時候我們姑且稱之為風機處于過功率狀態(tài), 能有效地減小風機吸收風能, 使風機不致超速運行。目前, 全球各型風機的限速保護方案大致可以歸為兩類。機械限速保護以某種機構使風輪偏離風向, 減小風輪迎風面積, 從

13、而減小風能的吸收。以某種機構利用風輪葉片的離心力改變槳距, 降低風輪的風能利用率, 從而達到減小風能吸收的效果。</p><p>　　機械限速保護裝置可靠性差, 除了設計不當?shù)囊蛩匾酝? 實際上是其固有弊端。自然界的風是十分復雜的。同時, 風速風向的變化頻繁而又迅速, 任何機械裝里都不可能瞬時響應實際風的變化, 加上長期運行導致的機械磨損會使裝置的配合間隙增大。所有這些均會導致保護滯后、失效以及劇烈的展動, 引發(fā)

14、風機飛車、過載和劇烈展動等破壞性結果</p><p><b>　　磁電限速保護</b></p><p>　　在當風機處于過功率二狀態(tài)時給發(fā)電機一個反向磁阻力矩， 大幅增加發(fā)電機所消耗的功率, 使之大于風輪輸出的功率, 從而使風輪轉速下降。風輪轉速的下降, 使風輪的葉尖速比減小, 從而降低定槳距風輪的風能利用率, 減小風輪吸收的風能, 從而進一步減低風輪轉速。為此連鎖作

15、用所產(chǎn)生的實際效果是減速而不是限速, 而磁電響應的過程, 使保護動作十分安全可靠。這一限速保護的優(yōu)點在于舍棄了機械限速結構, 排除了限速機構的機械故障隱患, 從根本上解決了小型風力機長期安全可靠運行問題。</p><p>　　Solar and Wind Hybrid Generation Systems</p><p>　　The dependence more and more is

16、now strong in the world people to the electricity. It is being far away the electrical network the area, the independent power supply system becomes the power source which the people most need, needs the low cost, the re

17、dundant reliable independent power supply system .It is reasonable in this kind of environment leeward light supplementary power supply system, because the modern energy service still could not achieve the place often wa

18、s the trough hides the rich </p><p>　　Remote districts use electricity the load not to be all big generally, therefore is uneconomical with the electrical network power transmission, directly generates elect

19、ricity commonly used in the locality uses the diesel electric engine .But the diesel oil storage and transport too is high to the remote districts cost, therefore the diesel electric engine only can take one kind of shor

20、t-time emergency power supply .Must solve the long-term stability reliable power supply problem, only can rely </p><p>　　Natural resource, also is the inexhaustible renewable energy .The solar energy is on t

21、he Earth source of the all energy, the sun is shining Earth's each land .The wind can be the solar energy in the earth's surface other one kind of manifestation, as a result of the earth's surface different s

22、hape like sandy soil ground, the vegetation ground and the water surface is different to the solar illumination heat absorption coefficient, forms the temperature difference in the earth's surface, the surf</p>

23、<p>　　Light and electricity system is transforms using the light and electricity board the solar energy the electrical energy, through controller to battery charging, again through invert to current collector powe

24、r supply set of systems .This system merit is the power supply reliability is high, the movement maintenance cost is low, but the system construction cost is high .The wind electricity system is the use small wind-driven

25、 generator, can transform the wind the electrical energy, through control</p><p>　　For several dozens years, the small wind-driven generator technology had the very big development, the industrial developmen

26、t has also obtained certain achievement, but fundamentally said, the reliable question has not always been solved .Since long ago, stemming from the cost consideration, the advanced hydraulic control technology has not u

27、sed in the small wind-driven generator regulating protection, only is uses the simple machinery control mode to carry on the regulating protection .The mech</p><p>　　Leaves optimized the system design plan t

28、o satisfy the request .Should say that, the scenery supplementary generating system is the most reasonable independent power supply system .The scenery supplementary generating system matches the scenery</p><p

29、>　　supplementary generating system to electroplate reasonably, the small wind power generation unit by the solar energy light, the central controller, the battery unit and the invert and so on several parts is compose

30、d, the generating system various parts accommodate the reasonable pair guarantee generating system reliability is extremely important .Generally speaking, is in the uniform allocation should consider following two aspect

31、 factor .Uses electricity the load characteristic to have to under</p><p>　　Gale regulating protection was the air blower loses human's energy to be bigger than the system at that time to be able to cons

32、ume energy sum total time which could as well as the system can store up we called for the time being it was at the overpower condition the air blower, could reduce the air blower to attract the end of exercise period en

33、ergy effectively, caused the air blower not to send the speed moment .At present, the global each air blower regulating protection plan approximately may</p><p>　　The mechanical regulating protective device

34、reliability is bad, except designs outside the improper factor, in fact is its inherent malpractice .The nature wind situation is extremely complex, the turbulent flow is the host condition, simultaneously, the wind spee

35、d wind direction change frequent and also is rapid in, any machinery installs all not the impossible transient response actual wind situation change, in addition the long-term movement causes the machinery wears can caus

36、e the equipment </p><p>　　Protection in the air blower is at&#8221; the overpower two conditions for a generator reverse magnetic resistance moment of force, largely increases the power which the generat

37、or consumes, causes it to be bigger than the power which the wind wheel outputs, thus causes the wind wheel rpm drop .The wind wheel rotational speed drop, causes the wind wheel the apex transmission ratio to reduce, thu