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            如何選擇離網逆變器的工作模式?

            返回列表 來源: 古瑞瓦特 發布日期: 2022.12.22 瀏覽次數:
            光伏優先用電模式

            工作原理 :光伏優先給負載供電,當光伏功率小于負載功率時,儲能電池和光伏一起給負載供電,當沒有光伏或者蓄電池電量不足時,如果檢測到有市電,逆變器再自動切換到市電供電。

            適用場景 :應用于無電地區或者缺電地區,市電的電價不是很高,經常停電的地方,要注意的是如果沒有光伏,但蓄電池電量還很充足時,逆變器也會切換到市電帶負載,缺點是會造成一定的電量浪費,優點是如果市電停電,蓄電池還有電,可以繼續帶負載。對用電要求很高的用戶可選擇這個模式。

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            電網優先用電模式

            工作原理 :不管有沒有光伏,蓄電池有沒有電,只要檢測到有市電,都是由市電給負載供電,只有檢測到市電停電后,才切換到光伏和電池給負載供電。

            適用場景 :應用于市電電壓穩定、價格便宜,但供電時間短的地方,光伏儲能相當于一個后備的UPS電源,這種模式的優勢是光伏組件可以配置相對較少,前期投資低,缺點是光伏能源浪費比較大,很多時間可能都用不到。

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            電池優先用電模式

            工作原理 :光伏優先給負載供電,當光伏功率小于負載功率時,儲能電池和光伏一起給負載供電,當沒有光伏,蓄電池電量單獨給負載供電,當蓄電池電量不足時,如果檢測到有市電,逆變器再自動切換到市電供電。

            適用場景 :應用于無電地區或者缺電地區,市電的電價較高,還經常停電的地方,需注意蓄電池電量要用到低值時,逆變器才會切換到市電帶負載,優點是光伏利用率很高, 缺點是用戶的用電不能完全保證,當蓄電池的電用完,但市電恰好停電時,就沒有電可以用了。對用電要求不是特別高的用戶,可以選擇該模式。


            Photovoltaic preferential mode of electricity consumption

            Working principle: photovoltaic gives priority to the load power supply, when the photovoltaic power is less than the load power, energy storage battery and photovoltaic power supply to the load, when there is no photovoltaic or battery power is insufficient, if the detection of mains power, the inverter automatically switches to the mains power supply.

            Applicable scenario: applied to without power or the power shortage region, mains electricity price is not high, frequent blackouts, note if there is no photovoltaic (pv), but there was plenty of battery power, the inverter will switch to the on load, electric defect is cause certain power waste, advantage is that if the mains power outages, and electric battery, can continue to load. Users with high demand for electricity can choose this mode.

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            Power grid priority mode

            Working principle: No matter whether there is photovoltaic, battery or not, as long as there is mains electricity detected, it is powered by mains electricity to the load, only after the mains power failure is detected, it is switched to photovoltaic and battery to power the load.

            Application scenario: It is applied to the place where the mains voltage is stable and the price is cheap, but the power supply time is short. The photovoltaic energy storage is equivalent to a backup UPS power supply. The advantage of this mode is that the photovoltaic modules can be configured relatively less and the initial investment is low.

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            Battery priority mode

            When the photovoltaic power is less than the load power, the energy storage battery and photovoltaic power supply to the load together, when there is no photovoltaic, battery power supply to the load alone, when the battery power is insufficient, if the detection of mains power, the inverter automatically switches to the mains power supply.

            Applicable scenario: applied to without power or the power shortage region, the mains electricity price is higher, often power outages, battery is in low power to use, should pay attention to the inverter can switch to the on load, electric, advantage is photovoltaic utilization rate is very high, the disadvantage is that users of electricity can't guarantee, when the battery of electric exhausted, but mains power failure, no electricity can be used. This mode can be selected for users who do not have high demand for electricity.


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