1051 results about "Electricity distribution systems" patented technology

A power distribution system/method implementing Internet based access to hybrid home automation networks is disclosed. The system utilizes a smart gateway power controller (SGPC) configured for single/multi-gang wallplate installation to selectively switch an AC power source to a load device under switched control and/or local/remote network commands that may be routed through a variety of network interfaces and protocols present within a home or other structure-local communications network. SGPC configurations may be nested within a home automation network to permit separation of control for load devices within a common home automation environment. Present invention methods may include routing protocols between disparate home automation networks as well as remote access protocols that permit control of disparate home automation networks via the Internet using a wide variety of remote access interfaces including mobile devices, tablet computers, laptops, desktop computers, and the like.

An arc fault detector system detects arcing faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop signals representing the electrical current flow through the monitored circuit and broadband noise signal components. The system analyzes these signals to determine whether an arcing fault is present, and if so, outputs a trip signal which may be used directly or indirectly to trip a circuit breaker or other circuit interruption device.

The invention discloses a fracturing well site layout system. The fracturing well site layout system comprises a gas source, a processing device, a power supply system, a power distribution system, anelectric drive fracturing device, an electric drive sand mixing device, a sand supply device, a liquid supply device, an instrument device and a high-low pressure manifold, wherein the gas source provides fuel needed by power generation for the power supply system after being processed by the processing device; the power supply system drives the electric drive fracturing device and the electric drive sand mixing device through the power distribution system; the sand supply device provides fracturing sand needed by mixing for the electric drive sand mixing device; the liquid supply device provides needed liquid for the electric drive sand mixing device; the output end of the electric drive sand mixing device is connected with the electric drive fracturing device through the high-low pressure manifold; the electric drive fracturing device communicates with a well mouth through the high-low pressure manifold; and the instrument device is used for remotely controlling the electric drive fracturing device and the electric drive sand mixing device. The fracturing well site layout system has the beneficial effects that the occupied area is smaller, the output power of the single electricdrive fracturing device is larger, wiring of the whole well site layout is simpler, the wiring time is shorter, and application is more flexible.

A system for operating a power line communication system is provided. One embodiment is comprised of a plurality of network elements, which may take the form of repeaters, bypass devices, backhaul devices, wireless backhaul devices, enhanced bypass devices, communication interface devices and others. In one embodiment, two groups of network elements in the same electrical distribution system are isolated except for a selected communication link.

The invention belongs to the field of power system reliability estimation, and relates to a method for estimating the reliability of an electric distribution system containing distributive wind power, photovoltaic and energy storage devices. The method comprises the following steps of: (1) acquiring configuration parameters of the electric distribution system; (2) forming a fault result list; (3) generating an energy storage charging and discharging state periodic list; (4) obtaining a normal running time TTF according to the fault rate of elements; (5) finding out an element which has TTFmin; (6) obtaining a fault time TTR according to the repair rate of the element, and calculating an energy storage state at the TTFmin moment; (7) searching the fault result list to determine a power failure situation of a load point in a non island area; (8) for an island area, calculating a draught fan real-time value, a photovoltaic real-time value and a load real-time value; (9) performing load attenuation on each island and recording the power failure situation of the load point in the island; (10) calculating the state variation of the energy storage of the island; (11) generating novel running time for the element and boosting a simulation clock to TTFmin+TTR; (12) searching for an element which is faulted at first again, and repeating the step (12) if the fault moment is less than the simulation clock, and if the fault moment is not less than the simulation clock, executing the step (13); and (13) judging whether the simulation clock is equal to a scheduled time length, and returning to the step (6) if the simulation clock is not equal to a scheduled time length; and if the simulation clock is equal to a scheduled time length, calculating a reliability index. By the method, the reliability level of the distribution system containing the distributive wind power, photovoltaic and energy storage devices can be estimated quantitatively.

The present invention is implemented by deploying an enhanced ground fault detection and location apparatus and by using the apparatus in conjunction with specific circuit analysis methods, using the information generated by the ground fault detection and location apparatus. The ground fault detection and location apparatus comprises the functionality of a voltmeter, an ammeter, a frequency generator, and a variable power supply, thereby providing for a variety of signals and analyses to be performed on a unintentionally grounded circuit in an ungrounded AC or DC power distribution system. The apparatus includes a main unit and a remote unit, which may be a portable hand-held unit. In a first mode, the apparatus of the present invention can be used to detect ground faults. By switching to a second mode, the apparatus of the present invention can be used to locate ground faults. The methods of the present invention involve the generation of various signals by the main ground fault detection and location unit. The generated signals are introduced into the electrical distribution system and monitored by various means, including one or more remote units. By analyzing the system-level response to the generated signals, the specific location of the ground fault or faults can be more readily ascertained, thereby promoting rapid and efficient repair and recovery practices. The apparatus of the present invention may be implemented as a dedicated, permanent installation or as a temporary portable system. Additionally, the system may be implemented as an automatic computer-controlled ground fault location and detection system.

A electricity management device increases a counter value as an electric vehicle is charged from grid power that is supplied from an electrical grid, retains the counter value when the electric vehicle is charged from electricity generated by an electricity generation device, and reduces the counter value as electricity in the electric vehicle is discharged to a distribution board.

Some embodiments provide a systems, methods, and devices for providing power to recharge portable electronic devices through a distributed network of portable power stations that provide power on an advertising and/or fee basis. In some embodiments, the power distribution system includes a server and multiple distributed portable power stations. The server communicates with electronic devices in order to receive a request to unlock power from a particular power station. The server sends an advertisement and a code to unlock the particular power station. In some embodiments, the server process payment information and sends the unlock code. Each of the portable power stations includes multiple charging interfaces and a lockable power supply that is unlocked using the server provided code. When unlocked, the power station recharges batteries of any electronic devices that are connected to any of the charging interfaces of the power station.

The invention discloses a power distribution line tower span panning method based on load reliability. The randomness of the maximum wind velocities of typhoons and the frequency of typhoon landing are taken into account; an overhead power distribution line load reliability calculation model is built based on the type I distribution of the maximum wind velocity values of typhoons; with the whole life cycle cost of a power distribution system as a target function and a pole model number and a span length as decision variables, an overhead power distribution line tower and span planning model is built. The power distribution line tower span panning method based on the load reliability is characterized in that the tower and span planning model with the whole life cycle cost of the power distribution system as the target function and the line span as a constraint condition is built by taking the power interruption cost due to line pole collapse and breakage faults into account in combination with a tower investment cost and a maintenance cost. Based on the planning method, the planning personnel can control the load risk level of an overhead power distribution line visually, and the optimal scheme considering both economic efficiency and reliability can be obtained.

The system and methods monitor odd harmonics within a power distribution system quantity using a special digital filter. A normal level of odd harmonics for the monitored quantity is established. Over predetermined time periods, the odd harmonics within the power distribution quantity are compared to the normal level, and a determination of whether a high-impedance fault is present in the monitored power distribution system is made.

The invention provides an electric vehicle charging guidance method considering road-network-vehicle, which considers the charging demand difference of different types of electric vehicles, performs optimized guidance scheduling on the electric vehicles in slow charging and fast charging modes from two aspects of day-ahead and real-time. The method comprises the following steps: establishing an electrical traffic cooperative control architecture; formulating a charging station selection and navigation strategy; formulating a time-sharing and zoning electricity price to guide quick charging; and establishing a double-layer optimization scheduling model to guide slow charging. According to the method, on the premise that the safety and economy of a power distribution system are guaranteed, the satisfaction degree of power consumers is considered, and different charging requirements, time and space and other factors are considered to research the guide strategy and operation mode of the electric vehicle. Analysis of the charging station and system load conditions before and after optimization shows that the method enables the system load to be gentler than that in a free charging mode, plays a role in peak clipping and valley filling to a certain extent, and improves the operation safety and economy of a power system.

Systems and methods are configured for detecting and locating simultaneous faults in a distribution network having primary and secondary buses connected with two-terminal sections. The measured three-phase voltages and currents from the primary buses are received via a communication network, and the series impedances and shunt admittances and the pre-fault connectivity topology are retrieved from the storage. Simultaneous faults are determined to occur by verifying at least one phase of at least three buses having phase current mismatches determined as the differences between the measured values and calculated values using normal topology and phase voltages that are greater than a threshold. A location for each fault is determined individually if the faults are occurring at non-adjacent sections in the distribution network, or jointly if the faults are occurring at adjacent sections in the distribution network. Faulted line sections are isolated by activating switching operations for connected switches to the faulted line sections that communicatively linked to distribution system grid via communication network.

The invention discloses a multi agent-based power transmission and distribution network and distributed type supply source coordinated control system. A power transmission and distribution network dispatching center is connected with a plurality of power distribution networks; the distribution networks are connected with a plurality of micro grids; the micro grids are connected with a plurality of micro grid components; each micro grid component includes a micro power source apparatus; and the coordinated control system includes a micro grid component agent layer which is used for micro power source optimal control, energy storage devices and controllable loads, a micro grid agent layer used for micro grid-level power grid dispatching operation control, a power distribution agent layer used for medium-voltage network and low-voltage network operation control, and a power transmission network agent layer used for the operation control of a whole power grid . According to the multi agent-based power transmission and distribution network and distributed type supply source coordinated control system of the invention, a power transmission and distribution system comprising distributed power sources is divided into agents with different functions; and through control on each agent and interaction between the agents, hierarchical coordinated control on the power transmission and distribution system comprising the large-scale distributed power sources can be realized.

Provided are an apparatus and method for load-balancing of a three-phase electric power distribution system having a multi-phase feeder, including obtaining topology information of the feeder identifying supply points for customer loads and feeder sections between the supply points, obtaining customer information that includes peak customer load at each of the points between each of the feeder sections, performing a phase balancing analysis, and recommending phase assignment at the customer load supply points.