31results about How to "Stable power supply performance" patented technology

A new charging pile power distribution system. The charging pile system includes a charging pile main control module, a charging pile controlled module, a charging billing module, a charging controller module, and a charging power supply module. The microgrid subsystem includes a wind power generation module, a photovoltaic power generation module module, power storage module, and micro-grid control module; the city grid subsystem includes a city grid module, a power load module, a city grid power consumption estimation module, a primary power storage module, a city power grid control module, and a micro-grid grid-connected module ; It can solve the waste of electricity in scattered micro-grids, which is beneficial to the peak-shaving and valley-filling of the national grid; through the monitoring of the charging power of each charging pile in the area and the statistics and regulation of the user's electricity consumption according to the electricity consumption estimation module of the city grid, the charging and distribution Control the charging power to provide charging users with a variety of charging modes for users to choose. By controlling the change of charging unit price, users are encouraged to use full power charging during low power consumption periods, so as to maintain the efficient circulation of electric energy in the city grid.

The invention discloses a universal type connecting device for an emergency power supply vehicle and a low-voltage overhead line. A connecting device is arranged between the emergency power supply vehicle and the low-voltage overhead line. One end of the connecting device is connected with the emergency power supply vehicle, the other end is connected with the low-voltage overhead line, and circuit connection with an isolation protection function is established between the emergency power supply vehicle and the low-voltage overhead line. The connecting device comprises an insulated cross arm assembly and a switch cabinet. An emergency power supply of the emergency power supply vehicle firstly passes through the switch cabinet and then is connected with the insulated cross arm assembly through a pole climbing cable connected with the switch cabinet, and the pole climbing cable is connected with a circuit of the low-voltage overhead line through the insulated cross arm assembly. The universal type connecting device is applicable to the fields of providing emergency protection, power generation and on-load transformer replacement work for customers along the low-voltage overhead line in a transformer area. The connection is reliable. A power supply effect is stable. The security is good. The universal type connecting device also can match the performance of novel working projects such as replacement of a transformer and a drop fuse under load.

The invention provides a low-voltage starting circuit capable of being started at high voltage and working in a wide range, comprising a first N switching transistor and a second P switching transistor which are used for switching different polarities and conducting. The connection pin of the first N switching transistor and the connection pin of the second P switching transistor are different from each other and are connected to the input end and the output end of a power supply; the base pole of the first N switching transistor is coupled with the node of a voltage stabilizing circuit, and the base pole of the second P switching transistor is coupled with the node of a switching controlling unit; and the switching controlling unit comprises a voltage dividing circuit, a compound stage switching controlling circuit and a voltage hysteresis circuit. Therefore, the structure of the low-voltage starting circuit is effectively simplified, the volume is reduced, the cost is lowered and the high-voltage bearing capacity is greatly improved. In addition, the low-voltage starting circuit can work in a wider range, can be started at both low voltage and high voltage and can still supply power stably when the high voltage critical value and the low voltage critical of the voltage hysteresis circuit are switched frequently.

The invention discloses a self-unlocking power conversion circuit, which comprises a thermal battery powering switch and the like, wherein a third sampling resistor and a first reference source are connected with a positive electrode input end of a first logic judgment operational amplifier, an output end of the first logic judgment operational amplifier is connected with the thermal battery powering switch, a first sampling resistor and a second sampling resistor, the first sampling resistor is connected in series with the second sampling resistor, the third sampling resistor is connected with the first reference source, a fourth sampling resistor is connected with a second reference source, and the fourth sampling resistor and the second reference source are both connected with a negative electrode input end of a second logic judgment operational amplifier. The self-unlocking power conversion circuit can effectively prevent a missile thermal battery from affecting operation of a carrier power supply during the activation process of the thermal battery when the carrier power supply and the missile thermal battery are in a grid-connected power supply state, and can prevent the problem of reliable output of the thermal battery after the thermal battery is activated.