A power control apparatus capable of stable transition of a set voltage is provided. A power control apparatus includes a DC to DC converter connected to a DC bus line, a communication unit that communicates with another power control apparatus, and a control unit that controls power interchange with the other power control apparatus through the DC bus line, in which the control unit controls at least a control mode and a droop rate, the control mode includes a first mode for controlling a voltage of the DC bus line, a second mode for controlling a current flowing through the DC bus line, and a third mode for stopping the power interchange, and when the control mode is shifted from the first mode to the second mode or the third mode, the control unit controls the droop rate to be set to a predetermined value other than 0%.

A system for generating, storing and managing energy features a solar-power center, a wind-power center, a hydrogen-power center with hydrogen fuel cells, a hydrogen supply center operable for producing hydrogen, and an energy storage center with both hydrogen storage tanks and one or more rechargeable batteries. An energy management subsystem monitors energy consumption from the system and available energy reserves at the power storage center, and manages the different centers based at least partly on the monitored consumption and reserves. A cooling loop circulates hydrogen for cooling of mechanical and electrical equipment, while heating loops use fuel cell waste heat and collected solar thermal energy for heat-requiring applications, such as warming of the battery storage in cold weather climates. Black-out/brown-out restart capability is included, as well as novel wind turbines whose rotor heights are autonomously adjusted to an optimal elevation based on wind conditions.

A central plant includes storage devices configured to store resources purchased from a utility or generated by the central plant and to discharge the one or more resources. The central plant includes a controller configured to obtain a cost function comprising a peak load contribution (PLC) term representing a cost based on an amount of the one or more resources purchased during coincidental peak (CP) subperiods. The controller is configured to modify the cost function by applying a peak subperiods mask to the PLC term, wherein, for each subperiod, the peak subperiods mask modifies a portion of the PLC term corresponding to the subperiod based on a probability that the subperiod will be one of the CP subperiods. The controller is also configured to perform an optimization of the modified cost function.

A power outlet control device includes at least one electrical outlet and a processing circuit comprising a processor and memory storing instructions that, when executed by the processor, cause the processor to perform operations. The operations include monitoring external power supplied to the power outlet control device, detecting one or more powerline events based on the external power supplied to the power outlet control device, and automatically controlling an amount of power supplied to the at least one electrical outlet based on the one or more powerline events.

According to one embodiment, a BBU includes an array of battery cells, a DC/DC converter coupled to the battery cells, and a first switch logic coupled to the battery cells and the DC/DC converter. The first switch logic is configured to switch the BBU to operate between a first mode and a second mode. When operating in the first mode, the first switch logic causes the output voltage of the DC/DC converter to be provided to an external load. When operating in the second mode, the first switch logic causes the output voltage of the DC/DC converter to be coupled to an internal load for the purpose of determining the health of the battery cells.

An automatic transfer switch (100) for automatically switching an electrical load between two power sources is provided. Two power cords (106) enter the ATS (A power and B power inputs) and one cord (109) exits the ATS (power out to the load). The ATS has indicators (107) located beneath a clear crenelated plastic lens (108) that also acts as the air inlets. The ATS (100) also has a communication portal (103) and a small push-button (104) used for inputting some local control commands directly to the ATS (100). The ATS (100) can be mounted on a DIN rail at a rack and avoids occupying rack shelves.

An EMS (200) receives at least one of a message indicating a rated output of the storage battery (141) and a message indicating number of charged and discharged times of the storage battery (141), from the power storage apparatus (140).

A method for controlling a supply of at least one load with voltage and/or electric current through an electric network.

In a power control system, a server transmits to each facility data generated by estimating a variation with time in power consumption in each facility and an upper limit value of power capable of being supplied to each facility. A HEMS controller calculates the sum of amounts of electric power consumed over an upper limit value on the basis of estimation data. A power conditioner reserves the power corresponding to the result of calculation in a storage battery in advance. The power conditioner supplies the power corresponding to the power storage capacity reserved in the storage battery to the facility in a case where the power consumption in the facility exceeds the upper limit value such that the upper limit of the power to be supplied from the system to the facility is set to the upper limit value.

Power distribution systems having a bi-directional link for delivery of power between each other are disclosed. According to an aspect, a PDU includes a first power inlet configured to receive electric power from a power source. The PDU includes a second power inlet configured to receive electric power from another power distribution unit. The PDU also include an electric power router configured to determine whether the power source is in a fault condition for delivering electric power to the first power inlet. Further, the electric power router is configured to communicatively engage the other PDU for managing receipt of electric power from the other PDU based on the fault condition. The electric power router is configured to receive, at the second power inlet, electric power from the other PDU. The electric power router is also configured to route, to power outlets, the electric power received from the other PDU.