太陽(yáng)能發(fā)電技術(shù)——光伏發(fā)電系統(tǒng)控制器畢業(yè)設(shè)計(jì)外文翻譯

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1、 附件1：外文資料翻譯譯文 太陽(yáng)能發(fā)電技術(shù)——光伏發(fā)電系統(tǒng)控制器 1 太陽(yáng)能充放電控制器現(xiàn)狀 1.1太陽(yáng)能光伏發(fā)電 太陽(yáng)能作為新能源有著巨大的優(yōu)勢(shì)，所以世界各國(guó)都在努力研發(fā)新技術(shù)進(jìn)行獲取，比較成熟的是太陽(yáng)能光伏發(fā)電技術(shù)。太陽(yáng)能光伏發(fā)電現(xiàn)已成為新能源和可再生能源的重要組成部分，也被認(rèn)為是當(dāng)前世界最有發(fā)展前景的新能源技術(shù)。目前太陽(yáng)能光伏發(fā)電裝置已廣泛應(yīng)用于通訊，交通，電力等各個(gè)方面。 在進(jìn)行太陽(yáng)能光伏發(fā)電時(shí)，由于一般太陽(yáng)能極板輸出電壓不穩(wěn)定，不能直接將太陽(yáng)能極板應(yīng)用于負(fù)載，需要將太陽(yáng)能轉(zhuǎn)變?yōu)殡娔芎蟠鎯?chǔ)到一定的儲(chǔ)能設(shè)備中，如鉛酸蓄電池。但只有當(dāng)太陽(yáng)能光伏發(fā)

2、電系統(tǒng)工作過(guò)程中保持蓄電池沒(méi)有過(guò)充電，也沒(méi)有過(guò)放電，才能使蓄電池的使用壽命延長(zhǎng)，效率也得以提高，因此必須對(duì)工作過(guò)程加以研究分析而予以控制，這種情況下太陽(yáng)能充電控制器應(yīng)運(yùn)而生。 1.2充電控制器的作用及現(xiàn)狀 太陽(yáng)能充電控制器具備充電控制、過(guò)充保護(hù)、過(guò)放保護(hù)、防反接保護(hù)及短路保護(hù)等一系列功能，解決了這一難題，這樣控制器在這個(gè)過(guò)程中起著樞紐作用，它控制太陽(yáng)能極板對(duì)蓄電池的充電，加快蓄電池的充電速度，延長(zhǎng)蓄電池的使用壽命。同時(shí)太陽(yáng)能充放電控制器還控制蓄電池對(duì)負(fù)載的供電，保護(hù)蓄電池和負(fù)載電路，避免蓄電池發(fā)生過(guò)放現(xiàn)象，由此可見(jiàn)，控制器具有舉足輕重的作用。 市目前場(chǎng)上有各種各樣的太陽(yáng)能控制器，但這些控

3、制器主要問(wèn)題對(duì)于蓄電池的保護(hù)不夠充分，不合適的充放電方式容易導(dǎo)致蓄電池的損壞，使蓄電池的使用壽命降低。目前，控制器常用的蓄電池充電法包括三種：恒流充電法、階段充電法和恒壓充電法。但是這些方法由于充電方式單一加上控制策略不夠完善，都存在一定的局限性。另一方面，當(dāng)蓄電池給負(fù)載供電時(shí)，由于控制器不能時(shí)刻檢測(cè)蓄電池的電壓，這樣很容易發(fā)生蓄電池的過(guò)放電，將會(huì)導(dǎo)致蓄電池的深度放電，嚴(yán)重影響其壽命。 所以，如何改善太陽(yáng)充控制器的充放電方式，開(kāi)發(fā)性能優(yōu)良的充放電控制器，提高其在實(shí)際應(yīng)用中的效率，成為了一個(gè)重要的研究方面。 2 控制器類型 控制器的基本功能類似于電壓調(diào)整器 ，主要用于防止蓄 電池被太

4、陽(yáng)電 池方陣過(guò)充電和被負(fù)載過(guò)放電。控制 器主要有四種類型：旁路控制器 、串聯(lián)控制器 、多階控制器和脈沖控制器。 2.1 旁路控制器 旁路控制器主要用 于小型光伏 系 統(tǒng)。當(dāng)蓄電池充滿時(shí)，通過(guò)旁路蓄電池 來(lái)防止過(guò)充電。旁路控制器的電路 系 統(tǒng)監(jiān)控蓄電池電壓，當(dāng)達(dá)到標(biāo)志著蓄電池充滿的予置電平時(shí)過(guò)充電流將被功率晶體管旁路到電阻器，將多余的額外功率轉(zhuǎn)變?yōu)闊?。旁路控制器的功率晶體管有帶翅的散熱器，幫助發(fā)散熱量。旁路控制器也可與二極管結(jié)合，以防止夜間電流從蓄電池流回方陣。二極管的作用如同一種形式的閥門，充電期間允許電流流入蓄電池 ，在夜間防止蓄電池電流向方陣“回流”或稱 “反向

5、泄漏”。旁路控制器設(shè)計(jì)簡(jiǎn)單。價(jià)格便宜，為避免周圍環(huán)境影響，電路系統(tǒng)完全是密封的，同時(shí)叉要便于為冷卻翅提供通風(fēng)路徑。分流控制的缺點(diǎn)是，有限的負(fù)載操作能力和有通風(fēng)要求 2．2 串聯(lián)控 制 器 當(dāng)蓄電池電壓達(dá)到被稱為充電終止點(diǎn)的予置電壓值時(shí)，串聯(lián)控制器通過(guò)開(kāi)關(guān)切斷電流 ，防止蓄電池過(guò)充。當(dāng)蓄電池達(dá)到充電恢復(fù)調(diào)整點(diǎn)低端予置電平時(shí) ，控制器將方陣和蓄電池接通。合成一體的內(nèi)置定時(shí)器，在充電過(guò)程終Lr至蓄電池組放電終止期間．進(jìn)行恒壓充電循環(huán)。串聯(lián)控制器使用傳感器來(lái)代替二極管通斷電路，以防止夜間的“反向泄漏”。由于不需要發(fā)散熱最，串聯(lián)控制器不安裝散熱器 體積小價(jià)格便宜的串聯(lián)控制器，較“旁路

6、控制器”具有更大的負(fù)載操作能力 ，通常也不要求 特殊的通風(fēng)。 2．3 多階控制器 多階控制器依據(jù)蓄電池的充電狀態(tài)，自動(dòng)設(shè)定不同的充電電流。當(dāng)蓄電池處于未充滿狀態(tài)時(shí) ，允許方陣電流全部流進(jìn)蓄電池。當(dāng)蓄電池組接近充滿時(shí)，控制器消耗掉一些方陣輸出功率，以便減少流進(jìn)蓄電池的電流。當(dāng)蓄電池組漫漫接近完全充滿時(shí) ，“涓流”充電漸漸停止。這種充電方式可以延長(zhǎng)蓄電池使用壽命。多階控制器需耍適 當(dāng)?shù)耐L(fēng) ．通常這種控制器設(shè)一個(gè)繼電器開(kāi)關(guān) ，防止夜 的“反向泄漏”。 2．4 脈沖控制器 脈沖控制器以“斬波”方式工作，對(duì)蓄電池進(jìn)行脈沖充電脈沖控制器的核心部件是一個(gè)受充電電壓調(diào)制

7、的“充電脈沖發(fā)生器”。開(kāi)始充電時(shí)脈沖控制器以寬脈沖充電，隨著充電電壓的上升 ，充電脈沖寬度逐漸變窄，平均充電電流減小。當(dāng)充電電壓達(dá)到予置電平時(shí) ，充電脈沖寬度變?yōu)榱?，充 電終止。脈沖控制器充電方法合理，效率高。 3 控制器性能特點(diǎn) 3．1 過(guò)放 電保護(hù) 使蓄電池避免過(guò)度放電，是光伏系統(tǒng)控制器的另一重要功 能。如果不注意 ，光伏系統(tǒng)的負(fù)載能夠輕易地耗盡蓄電池的電 能。一般的光伏系統(tǒng)控制器都具有保護(hù)深循環(huán)蓄電池過(guò)度放電 的功能?？刂破鞣乐剐铍姵剡^(guò)放電的措施有： (1)在達(dá)到予置的待充電電平時(shí) ，斷開(kāi)負(fù)載。 (2)信號(hào)燈或蜂鳴器動(dòng)作報(bào)警 ，顯示蓄電池 電壓過(guò)低。 (3)自動(dòng)接通一個(gè)

8、后備電源。當(dāng)蓄電池處于低 的荷電狀態(tài) 時(shí)，啟動(dòng)后備電源，例如柴油發(fā)電機(jī)向蓄電池組充電。當(dāng)蓄電池 被充滿后 ，控制器斷開(kāi)后備 電源 ，光伏系統(tǒng)重新開(kāi)始它的蓄電 池充電運(yùn)行。 3.2 控制器功能選擇 商品化制造的光伏系統(tǒng)控制器 ，其功能特點(diǎn)各有不同，可 根據(jù)下列的控制器功能特點(diǎn)進(jìn)行選擇。 (1)溫度補(bǔ)償：依據(jù)環(huán)境溫度調(diào)整蓄電池充電電流。 (2)負(fù)載斷路器：當(dāng)更換熔斷器有困難或不能滿足需要時(shí)， 可以代替負(fù)載熔斷器。 (3)低電壓報(bào)警器：當(dāng)蓄電池荷電狀態(tài)低于予置電平時(shí)，可 聽(tīng)到警告聲響。 (4)低電壓斷開(kāi)：當(dāng)蓄電池放電至予置電平時(shí)，自動(dòng)切斷負(fù)載。(5)電壓指示器：模擬或數(shù)

9、字方式顯示蓄電池電壓 ，指示蓄 電池的荷電狀態(tài)。 (6)電流指示器 ：模擬或數(shù)字方式顯示太陽(yáng)電池方陣電流 和輸出的負(fù)載電流。 (7)安培小時(shí)計(jì) ：數(shù)字 示蓄電池已放電量或剩余電量。 (8)后備充電啟動(dòng)控制：自動(dòng)啟動(dòng)后備電源，對(duì)蓄電池組進(jìn) 行充電。 (9)方陣功率分流調(diào)節(jié)器：將多余的方陣充電功率旁路到 非重要負(fù)載 ，例如電熱水器等。 (10)日照監(jiān)測(cè)器：測(cè)量可利用的太陽(yáng)輻射強(qiáng)度。 (11)負(fù)載記時(shí)器 ：定時(shí)負(fù)載用的記時(shí)鐘 ，用于需要予置運(yùn) 行時(shí)間的負(fù)載，例如安全警戒照明燈等。 (12)充 電指示：蓄電池達(dá)到充滿電壓時(shí) ，發(fā)光二極管指示 燈點(diǎn)亮。(13)自動(dòng)均衡充電：定期 自動(dòng)對(duì)蓄電池進(jìn)行

10、均恒充電。 附件2：外文原文 SOLAR POWER GENERATION TECHNOLOGY —— Photovoltaic power generation system controller BSeetanahAJKhadaro 1 solar charging and discharging controller status quo 1.1 solar photov

11、oltaic power generation Solar energy as a new energy has a huge advantage, so all countries in the world in efforts to develop new technology to obtain more mature is solar photovoltaic power generation technology. Solar photovoltaic power generation has become an important part of the new energy a

12、nd renewable energy, is also considered the current of the worlds most promising new energy technologies. The current solar photovoltaic power generation device has been widely used in communications, transportation, electricity, and other aspects. In the solar photovoltaic power generation, as a r

13、esult of general solar plate output voltage is not stable, not directly applying solar energy plate to load, needs to transform solar energy into electrical energy stored in a storage device, such as lead-acid battery. But only when the solar photovoltaic power generation system in the process of th

14、e work, keep the battery charged had no discharge, to extend the service life of the battery, it also increased efficiency, so must be made on the working process of the research analysis and control, in this case the solar charge controller arises at the historic moment. 1.2 the effect of charge c

15、ontroller and the present situation Solar charge controller with control charging, overcharge protection, discharge protection, meter, and a series of protection and short circuit protection function, solved this problem, this controller plays a pivotal role in the process, it controls the solar pl

16、ate of battery charging, speed up the battery charging, prolong the service life of the battery. Solar charge controller but also control the load power supply, battery protect battery and load circuit, avoid battery discharge phenomenon, thus, the controller plays a decisive role. City currently h

17、as a variety of solar controller, but the main problem controller to protect the battery enough, inappropriate is easy to cause the damage to the battery charge and discharge way, reduce the service life of the battery. At present, the commonly used controller battery charging method includes three

18、types: constant current charging method, phase charging method and constant voltage charging method. But these methods due to the imperfection of the charging ways of a single and control strategy, there are some limitations. On the other hand, when the battery to the load power supply, as the batte

19、ry voltage detection controller cant time, so it is easy to occur over discharge of battery, will lead to the depth of the battery discharge, seriously affect its life. So, how to improve the solar charge controller to charge and discharge, development of excellent performance of charge and dischar

20、ge controller, to improve the efficiency in the practical application, has become an important research aspect. Two types of controller The basic function of the controller is similar to the voltage regulator, is mainly used to prevent the battery by solar electricity storage Pool phalanx of char

21、ging and been load discharge. Control device mainly has four kinds: the bypass controller, serial controller, controller and multistage pulse controller. 2.1 the bypass controller Bypass controller mainly use for small pv system. When the battery is full, through the bypass battery To prevent ove

22、r charging. Bypass circuit system to monitor the battery voltage of the controller, when achieved marked the battery is full of in the electricity at ordinary times of charging flow will be power transistor bypass to the resistor, excess extra power into heat. Bypass the controllers power transistor

23、 with fin radiator, help radiate heat. Bypass the controller can also be combined with diode, in order to prevent the night electric current to flow from the battery back to square. The role of the diode as a form of valve, lets current flow into the battery during charging, at night to prevent batt

24、ery electric flow phalanx "return" or said "Reverse leakage". Bypass controller has a simple design. Cheaper price, in order to avoid the environment influence, circuit system is completely sealed, fork at the same time to facilitate ventilation path for cooling fins. Bypass control fault is, the l

25、imited load operation ability and ventilation requirements 2.2 serial control When the battery voltage to known as charging termination points in the voltage value, the series controller by switch to cut off the current, to prevent the battery overcharge. When battery charge to restore some low-en

26、d adjusted in the electricity at ordinary times, the controller will phalanx and battery connected. Synthesis of one of the built-in timer, in the charging process between Lr and battery discharge termination. Constant voltage charging cycle. Series controller using sensors to replace the diode on-o

27、ff circuit, to prevent the "reverse leakage" in the night. Because do not need to send the most heat dissipation, not to install the radiator series controller Small volume price cheap series controller, a "bypass controller" has greater load operation ability, is usually not requiredSpecial ventila

28、tion.More than 2.3 order controller More order controller on the basis of the storage battery charging status, automatic setting different charging current. When the battery is in a state of underfill, allowing all square current flow into the battery. Controller when the battery is close to full

29、 of consume some square power output, in order to reduce the current flow into the battery. When battery long close to full, gradually stop "trickle charging. This way of charging can extend the service life of the battery. More order controllers need to be comfortable when ventilation. Usually, thi

30、s set a relay switch controller, prevent the "reverse leakage" of the night. 2.4 pulse controller Pulse controller with "chopping" way to work, the core component of pulse charging pulse controller for battery is a charging voltage modulation charging pulse generator. Start charging pulse controll

31、er with wide pulse charging, as the charging voltage rise, charging pulse width Narrows gradually, the average charging current decreases. When the charging voltage reaches in the electricity at ordinary times, charging pulse width goes to zero, rechargeable electric terminated. Pulse controller cha

32、rging method is reasonable, high efficiency. 3 controller performance characteristics 3.1 put electricity protection To avoid excessive battery discharge, is another important power of the pv system controller. If do not pay attention to, the photovoltaic system load can run out of battery power

33、can easily. General photovoltaic system controller has deep cycle battery protection function of excessive discharge. Controller to prevent the battery discharge measures include: (1) is reached in the charge for electricity at ordinary times, disconnect the load. (2) of a semaphore or buzzer alarm,

34、 shows that the battery voltage is too low. (3) through to a backup power supply automatically. When the battery is in a state of low charged, start the backup power supply, such as diesel generator to the battery charging. When when the battery is filled, a continuous controller disconnect back-up

35、power, photovoltaic system restart it electric storage pool charging operation. 3.2 the function Commercialization of pv system controller, its function characteristics are different, can undertake choosing according to the following controller function characteristic. (1) temperature compensation

36、: according to environment temperature to adjust the battery charging current. (2) the load circuit breaker: when if there is any difficulty cannot satisfy the needs or replace the fuse, fuse can substitute for load. (3) low voltage alarm: when the battery charged state is lower than in the electric

37、ity at ordinary times, can hear the warning sound. (4) low voltage disconnect: when the battery to discharge in the electricity at ordinary times, cut off the load automatically. (5) the voltage indicator: analog or digital display battery voltage, indicates the charged state of storage battery. (6)

38、 current indicator: analog or digital display solar cell phalanx output current and load current. (7) ampere hour meter: digital storage battery is power or battery. (8) backup start charging control: automatically start backup power supply, recharging the battery into the line. (9) square power shu

39、nt regulator: excess phalanx charging power to bypass The important load, such as electric water heater, etc. Rizhao monitor (10) : measurement of available solar radiation intensity. (11) load chronograph: load with the clock regularly, line in the shipment time is applied to load, such as security lighting, etc. (12) rechargeable electric instructions: to achieve full of battery voltage, light emitting diode Lights up. (13) automatic equalizing charge: automatically on a regular basis for both constant charging battery.