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Reliability status of contactless voltage regulator

結合我國供電現狀，專為穩定交流電壓而研制的節能型產品，當配電網絡供電電壓波動或負載變化時，能自動保證輸出電壓的穩定，具有容量大、效率高、穩壓范圍寬、無附加波形失真和相移、應變時間快、平穩等特點，并有過壓、過流、缺相、短路，機械故障等完善報警保護功能，同時體積緊湊小巧，是傳統機器的三分之二，人性化的設計，采用液晶顯示，使用方便，所有的操作在前面板上一目了然，可以使穩壓器靠墻安裝，減少安裝空間，采用國際專利最先進的DSP數字技術，能在非常短的時間那處理大量的訊息，有效提高了效率和可靠性，清晰的LCD顯示面板由微處理器控制，可顯示：狀態及告警信息、輸入、輸出參數測量：電流、電壓所有參數調試在出廠前已全部完成，用戶只需按面板上的“啟動”按鍵開機或按“停止”按鍵關機即可。

Combined with the current situation of power supply in China, the energy-saving products specially developed for stabilizing AC voltage can automatically ensure the stability of output voltage when the supply voltage of distribution network fluctuates or the load changes. It has the characteristics of large capacity, high efficiency, wide range of voltage stabilization, no additional waveform distortion and phase shift, fast and stable strain time, as well as overvoltage, over-current, phase loss, short circuit, mechanical fault, etc Perfect alarm protection function, compact and compact, is two-thirds of the traditional machine. The humanized design and LCD display make it easy to use. All operations are clear at a glance on the front panel. The regulator can be installed against the wall to reduce the installation space. The most advanced DSP digital technology of international patent can process a lot of information in a very short time, which is effective The efficiency and reliability are improved. The clear LCD display panel is controlled by microprocessor, which can display status and alarm information, input and output parameters measurement: all parameters of current and voltage have been debugged before delivery. Users only need to press the "start" button on the panel to start the machine or press the "stop" button to shut down.

二、無觸點穩壓器性能比較

2、 Performance comparison of contactless voltage regulators

自耦式：此種結構的無觸點穩壓器，是通過控制雙向可控硅的通斷，來直接改變自耦變壓器的變比，從而達到穩定輸入電壓的目的。由于雙向可控硅直接串接在主電路商，器件選擇受限制（相同容量的穩壓器，需選擇大功率器件），可靠性差。

Autotransformer: the contactless voltage regulator with this structure can directly change the transformation ratio of autotransformer by controlling the on-off of bidirectional thyristor, so as to stabilize the input voltage. Because the bidirectional thyristor is directly connected in series in the main circuit supplier, the selection of devices is limited (the same capacity voltage regulator needs to choose high-power devices), so the reliability is poor.

純補償式：此種結構是通過雙向可控硅的通斷，控制補償變壓器組合的投入、退出或改變極性，從而達到穩定輸出電壓的目的。由于其雙向可控硅通過橋臂形式，直接接在相線與零線之間（220V），因而工作電壓高，換檔時產生的浪涌電流大；且在雙向可控硅誤動動作時，容易產生直通現象，故障率極高。

Pure compensation type: this kind of structure can control the input, exit or change the polarity of the compensation transformer combination through the on-off of bidirectional thyristor, so as to achieve the purpose of stabilizing the output voltage. Because the bidirectional thyristor is directly connected between the phase line and the zero line (220 V) through the bridge arm, the working voltage is high, and the surge current generated during gear shifting is large; moreover, when the bidirectional thyristor misoperates, it is easy to produce through phenomenon and the failure rate is very high.