An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A pump configuration includes a single VFD configuration, the single shaft electric motor, and the single shaft hydraulic pump mounted on the single pump trailer. The single VFD configuration converts the electric power at the power generation voltage level distributed from the power distribution trailer to a VFD voltage level and drives the single shaft electric motor to control the operation of the single shaft electric motor and the single hydraulic pump. The VFD voltage level is a voltage level that is required to drive the single shaft electric motor. The VFD configuration also controls operation of the auxiliary systems based on the electric power at the auxiliary voltage level.

Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.

A micro grid system comprises a secondary energy source and a power controller. The secondary energy source is associated with the micro grid, and the secondary energy source is configured to generate first DC power signal. The power controller is in communication with the secondary energy source and an electric grid, and configured to receive first AC power signal from the electric grid and the first DC power signal from the secondary energy source and to output a second AC power signal to loads in communication with the power controller. The power controller comprises a frequency converter configured to change frequency of the second AC power signal, a processor, and a memory configured to store instructions that, when executed, cause the processor to control the frequency converter to change the frequency of the second AC power signal.

The present disclosure provides a photovoltaic (PV) disconnect device used in an electrical system. The electrical system includes an energy control system electrically coupled to a utility grid. The electrical system includes a PV power generation system electrically coupled to the energy control system. The electrical system includes an energy storage system electrically coupled to the energy control system. The PV disconnect device is electrically coupled to the PV power generation system and the energy control system. The PV disconnect device electrically disconnects the PV power generation system from the energy control system.

A smart switching panel for selectively connecting either a primary power supply or a secondary power supply to a plurality of electric loads. The switching panel includes a plurality of switching elements each connected to both the primary and secondary power supplies. A controller of the switching panel operates to cause the switching element to transition between a first position in which the primary power supply is connected to the electric load, a second position in which the secondary power supply is connected to the electric load and an open condition. A current sensor is positioned to monitor the amount of current drawn by the electric load and is connected to the controller such that the controller can monitor the amount of current drawn by each of the electric loads. The controller can transition each of the switching elements to the open condition when the current draw exceeds a current threshold.

A method for controlling a power distribution network includes receiving, via an electronic processor, a fault indication associated with a fault from a first isolation device of a plurality of isolation devices. The processor identifies a first subset of a plurality of phases associated with the fault indication and a second subset not associated with the fault indication. The processor sends a first open command to each member of a set of downstream isolation devices for each phase in the first subset. The processor identifies a plurality of tie-in isolation devices to be closed to restore power. Responsive to identifying a first potential loop configuration, for each of the plurality of tie-in devices, the processor sends a close command to the tie-in isolation device for each of the plurality of phases and sends a second open command to the associated downstream isolation device for each phase in the second subset.

Techniques for controlling a power distribution network are provided. An electronic processor receives, a fault indication associated with a fault from a first isolation device of a plurality of isolation devices. The processor identifies a first subset of a plurality of phases associated with the fault indication and a second subset of the plurality of phases not associated with the fault indication. The processor identifies a downstream isolation device downstream of the fault. The processor sends send a first open command to the downstream isolation device for each phase in the first subset. The processor sends a close command to a tie-in isolation device for each of the plurality of phases. The processor sends a second open command to the downstream isolation device for each phase in the second subset. Responsive to identifying a potential loop configuration, the processor sends the second open command prior to the close command.

A power conversion system includes: a storage battery; a first power conversion device configured to implement grid-connection operation with an electric power grid, converting electric power of the storage battery, outputting converted power to a connection point between load equipment and the electric power grid to supply electric power to the load equipment; and a controller transmitting a load adjusting signal to a load control part in the load equipment for reducing electric power supply to the load equipment if a state of the storage battery matches a remaining power shortage condition which is set in advance, during stand-alone operation in which the electric power grid is disconnected from the first power conversion device.

An electronic device that has control electronics that have at least one program memory with a computer program stored therein and a processor for executing the computer program. The computer program has software control functions for controlling functions of the electronic device. The electronic device has at least one communication unit coupled to the control electronics, by means of which the electronic device is equipped for data communication with an external computer device. The communication unit is designed as a replaceable communication module. The communication module has a gateway functionality via which a bidirectional conversion takes place between an external communication protocol and/or physical layer used by the external computer device and an internal communication protocol and/or physical layer used between the communication module and the processor. The communication module supports either exactly one external communication protocol or multiple external communication protocols.

A communications network for communication between at least one power electronics element and at least one control unit is disclosed. According to one or more embodiments, the communications network can be described as a communications network having parts or portions thereof employing multi-hop and/or hybrid communication.