Shenzhen Extension Technology Co., Ltd. is specialized in high-frequency switching power supply development of high-tech enterprises, with many years of high-frequency switching power supply design and manufacturing experience, the products are widely used in telecommunications, electricity, railway, mining, defense and other industries or departments. Extension of TKZW series (also known as GZDW series) microcomputer-controlled high-frequency switching power supply DC system is mainly used in substations and power plants, as the circuit breaker closing power supply, relay protection device power and operating power can also be used for other needs 220V (110V) DC power supply place. The product is designed for high reliability and high performance requirements of the power industry. It is a replacement product and import substitute for silicon controlled rectifier and magnetic saturation DC power supply system. Compared with the traditional SCR DC system, Extension of TKZW series of high-frequency switching power supply DC system has the following advantages: First, the excellent performance Extension of TKZW series of computer-controlled high-frequency switching power supply DC system and SCR DC technology and performance comparison table is as follows: Second, high reliability When the traditional SCR DC charging device fails, the entire charging device must be taken out of operation and then be maintained and overhauled, reducing the reliability of the system. Extension of TKZW series of computer-controlled high-frequency switching power supply DC system due to the modular structure (with 220V / 5A, 220V / 10A, 220V / 15A, 220V20A four specifications) and n +1 backup mode, the reliability of the system greatly Improve, and provide a great convenience for system expansion. When a rectifying module in the running power supply system fails, the module automatically exits. Other modules continue to work in equilibrium without affecting the system power supply. When the user needs to expand the capacity of the power system, just increase the rectifier module can be achieved. Third, to meet all the requirements of the battery At present, power plants, substation DC system mainly uses nickel-cadmium batteries or maintenance-free lead-acid batteries, these two batteries have higher requirements for charging equipment. Extension of TKZW series of high-frequency switching power supply DC system to meet the battery charging characteristics with SCR unmatched advantages. First of all, the SCR device due to large output ripple, the output voltage and output current instability, resulting in long-term overcharged battery, resulting in the battery is usually only running for 1 to 2 years there will be battery cracking and battery failure phenomenon, a serious impact The battery life. The high-frequency switching power supply due to small output ripple, output voltage and output current stability, can greatly extend the battery life. Second, the battery deep discharge or multiple high-current discharge, the use of SCR charging device charging, the initial charge of the battery voltage is too low, the charge current will exceed the battery charge rate, the impact on the battery to shorten the battery life . The high-frequency switching power supply DC charging device maximum output current is not affected by the load, only depends on the factory setting of current limit value. The current limit value is based on the user to use the battery capacity to determine the maximum charge current value. With this restriction, you can ensure that the battery will gradually recover its capacity at a safe charge rate even after deep discharge. Third, the power plant, substation DC system uses a large number of single battery, long-term operation will inevitably occur a battery failure phenomenon (equivalent to the battery open circuit), then the charging equipment alone with load operation. If you are using SCR charging device, it may directly lead to relay protection, automatic device malfunction, with serious consequences. If the high-frequency switching power supply, even if the battery from the system, the system can still be high-quality, high reliability to the normal load power supply. In addition, high-frequency switching power supply DC system can meet more varied system operation, completely solve the long-standing concerns of the DC system. From the above comparison, we can see that the extension of TKZW series of high-frequency switching power DC system, technical performance, reliability, intelligent control and system structure are far superior to the traditional SCR DC system, it will become today's power Industry mainstream DC power supply. Extension of TKZW series of high-frequency switching power supply DC system is widely used, will make China's power industry DC power supply system equipment into a new era!