47results about How to "Guarantee the security of power supply" patented technology

The invention discloses a power supply seamless switching device and method of an electrified railway traction substation. Four paths of voltages, namely two-phase voltages of buses a and b of a contact network and voltages of a bus I and a bus II of a power supply, and four switching position signals, namely switches 201A and 201B of a low-voltage side of a main transformer 1B and switches 202A and 202B of a low-voltage side of a main transformer 2B are accessed to the switching device. During application, the current running mode of the traction substation is identified according to access quantity, automatic charging is achieved to prepare for switching if the running mode is normal, and discharging is performed to lock a switching function if the running mode is abnormal; three switching modes of parallel automatic switching, parallel semi-automatic switching and series switching can be performed; an optimal switching-on mode can be selected according to a real-time relation between the bus voltages of the power supply and the bus voltages of the contact network during switching on; and six modes of parallel rapid switching, rapid switching, same-phase lead phase angle switching, same-phase lead time switching, residual voltage switching and long delay switching can be performed, and uninterruptible power supply switching of two power supplies of the electrified railway traction substation can be achieved.

The invention discloses an anti-collision auxiliary device for a new energy vehicle battery pack, which relates to the field of new energy vehicle batteries. A triangular block is arranged inside the longitudinal chute and the transverse chute, and the bottom end of the triangular block is connected with a spring. The invention realizes that the slider can slide in four directions at the top of the mounting plate, and judges which direction to push the slider according to the inclination information collected by the inclination sensor, so as to increase the counterweight of the automobile chassis, thereby reducing the probability of overturning, and achieving The purpose of protecting the battery, and after sliding, it is firstly locked by the triangular block with a special structure, and the slider cannot return to the original point until the driver judges that there is no danger of overturning, and controls the first motor, the first electric push rod and The second electric push rod is activated, and pushes the slider together with the battery case to the origin, which ensures smooth subsequent formation.

The invention discloses a method and a device for monitoring ground faults of an overhead wire. The method includes synchronously measuring an incremental vector of current within a time period Delta t of each of a current phase a, a current phase b and a current phase c of a distribution network, computing the sum of the vectors, determining that the three current phases are balanced if the sum of the vectors is a set threshold value, and determining that a current circuit does not have a ground fault; and determining that the three current phases are imbalanced if the sum of the vectors is not the set threshold value, and determining that the current circuit has a ground fault. The method and the device have the advantage that the ground fault judgment accuracy is improved.

The invention belongs to the field of electric vehicle charging and replacement, and specifically relates to a mobile charging equipment dispatching method, system, and device based on random locations, aiming to solve the problems of inconvenient charging at charging stations and low utilization rate of charging equipment. The method of the present invention is applied to a charging station system with mobile charging equipment, including a track, a mobile charging device, and a parking detection device; the track includes a first track and a plurality of second tracks, and the first track is set at a parking charging position, and the track switching device Connect with the second track; when the parking detection device is triggered, obtain the parking charging bit code where the electric vehicle to be charged is located and its corresponding target second track position; obtain the track where the mobile charging device in standby state reaches the target second track position Itinerary: connecting the target second track and the first track through the track switching device; selecting the mobile charging device with the shortest track travel to move along the first track to the target second track. The invention improves the utilization rate of the charging equipment.

The invention relates to the technical field of dual-power-supply switching power supply, and discloses a dual-power-supply switching power supply system which comprises a central processing unit, the receiving end of the central processing unit is in signal connection with the transmitting end of a total database, and the receiving end of the central processing unit is in signal connection with the transmitting end of a power supply switching unit. The receiving end of the central processor is in signal connection with the transmitting end of the power control unit. According to the dual-power-supply switching power supply system, the UPS power supply serves as common power, the distribution room power supply serves as standby power, one power supply path is added on the original basis, automatic switching is achieved after one power supply path loses power, and power supply safety of important equipment is guaranteed; the circuit monitoring unit is arranged to detect the power supply circuit in real time, the power supply control unit is controlled to adjust the current and voltage of the circuit, and the power supply monitoring unit is arranged to monitor the power supply of the UPS. The power supply monitoring unit controls the power supply switching unit through the feedback module and the negative feedback compensation module to replace the power supply of the power distribution room.

The invention belongs to the field of electric vehicle charging and replacement, and specifically relates to a scheduling method, system and device for mobile charging equipment based on an ordered queue, aiming to solve the problems of inconvenient charging at charging stations and low utilization rate of charging equipment. The method of the present invention is applied to a charging station system with mobile charging equipment, including a track, a mobile charging equipment, and a parking detection device; the track includes a first track, a plurality of second tracks, and a third track; when the parking detection device is triggered, the obtained The code of the parking charging position where the electric vehicle to be charged is located and its corresponding target second track position; obtain the track journey of the mobile charging equipment in standby state to reach the target second track position; connect the target second track and the first track through the track switching device; The mobile charging device selected to be placed at the head of the team in the third track moves to the target second track along the first track. The invention improves the utilization rate of the charging equipment.

The invention provides a printed circuit board for wiring protection of a socket, particularly relates to a power supply protection device for socket detection and belongs to the technical field of power supply protection. The power supply protection device is installed on a power utilization device, connected between a triangle socket and the power utilization device and is serially connected with a power line of the power utilization device. The power supply protection device is used for detecting the wiring line sequence of the triangle socket and automatically introducing the triangle socket into the power utilization device when the detection is passed. According to the invention, faults of the power utilization device caused by wiring mistakes of the triangle socket can be reduced; difficulty in checking a specification for a protection detection jack by a user is released; an overvoltage protection function is added; and electromagnetic interferences are filtered; power supply security of the power utilization device is ensured from multiple aspects; and user experience is greatly improved.