14 results about "Phase balancing" patented technology

A system for adaptive electrical load balancing and phase balancing in a multi-node power grid, the system comprising: a plurality of electrical nodes interconnected via a multi-phase power distribution network, each electrical node comprising a sensor unit configured to measure electrical parameters such as phase voltage, phase current, phase angle, and power factor; an analog-to-digital converter unit coupled to the sensor unit and configured to convert measured electrical parameters into digital signals; a processing unit operationally coupled to the analog-to-digital converter unit and configured to determine the load distribution characteristics and phase imbalance states across the plurality of electrical nodes;a switching unit with a plurality of controllable switching elements arranged such that electrical loads can be selectively connected to different phases and nodes; and a communication unit configured to send and receive data between the numerous electrical nodes and at least one processing unit, the processing unit being configured to generate control signals based on the determined load distribution characteristics and phase imbalance conditions to actuate the switching unit to redistribute electrical loads across phases and nodes in order to achieve a balanced phase load.

The invention discloses a transformer area three-phase balance and regional load balance method, device, equipment and medium, and belongs to the field of power distribution network power planning, and the method comprises the steps: screening a first sub-region with unbalanced load from each sub-region according to the total energy consumption of each sub-region in a to-be-planned region and the total number of users; obtaining and preprocessing three-phase current time sequence data of each first device in the first sub-region; the energy consumption of the first equipment is greater than preset energy consumption; according to the preprocessed three-phase current time sequence data, screening out a second device with unbalanced three phases from the first devices; constructing a multi-objective optimization mathematical model by taking the three-phase current balance of each second device and the load balance of the to-be-planned area as optimization objectives; and according to a solving result of the multi-objective optimization mathematical model, redistributing a connection phase of each second device and a sub-region to which the second device belongs. According to the invention, the problem that the three-phase balance and regional load balance of the low-voltage transformer area of the power distribution network cannot be optimized in time in a dynamic environment can be solved.

The invention discloses an SOC interphase balancing method and device of a cascade energy storage system under an asymmetric load, electronic equipment and a storage medium, and the method comprises the steps: carrying out the positive and negative sequence separation according to the load side voltage and current collected in the cascade energy storage system, and obtaining the positive sequence voltage and current, and the negative sequence voltage and current; independently controlling the positive sequence voltage and current and the negative sequence voltage and current respectively; in response to the result of the independent control, if the unbalance degree of the three-phase current in the cascade energy storage system exceeds a set threshold value, suppressing the negative sequence component of the current; and responding to the maximum SOC deviation value in the cascaded energy storage system, and if the maximum SOC deviation value is greater than a set threshold value, starting SOC interphase equalization and superposing a zero-sequence component on the voltage positive-sequence component. According to the invention, SOC inter-phase equalization of energy storage under asymmetric loads is realized, and the battery consistency of the energy storage system is ensured.

The application discloses a three-phase balancing method and device of a dual-input power supply equipment and electronic equipment, relates to the technical field of computers, and comprises the following steps: determining module power corresponding to each power module connected with a current distribution unit, and calculating phase power of each phase in the three-phase current distribution unit. According to the three phase powers, a reference phase power is obtained, and a phase deviation degree of each phase is obtained based on the phase power and the reference phase power. When it is detected that the phase deviation degree exceeds a preset adjustment threshold, at least one target adjustment module is selected; and the circuit relationship between the target adjustment module and the current distribution unit is adjusted, so that the three-phase balancing of the dual-input power supply equipment can be adjusted without the need of rewiring inside the dual-input power supply equipment, and the problem that the efficiency of realizing the three-phase balancing of the dual-input power supply equipment is low is solved.

A balun circuit addresses the bandwidth issue by using symmetric amplitude division and phase delay networks to convert single-ended signals to differential signals. Because the balun circuit's balance characteristics are guaranteed over a very wide bandwidth, other performance characteristics that can limit the operating bandwidth, such as impedance matching and insertion loss, can be carefully addressed without concern for amplitude and phase balance. A balun circuit splits a single-ended signal into four differential paths through symmetric networks and applies phase inversion by inverting the polarity of each differential path, thereby reducing the complexity, size, and loss of the balun circuit's overall configuration.

In a network data center, a plurality of modules provide power to equipment racks. Each of the modules has a plurality of taps which are connected by internal switching elements to power mains through an internal power distribution bus, such that each of the modules can switch any of the plurality of taps to two of the three phases of power. Each of the equipment racks has a multi-branch power distribution unit, branches of which may be connected together to receive power from the same tap. The number of branches in each multi-branch power distribution unit is configurable to adapt to the power requirements of the equipment rack. Power and control signals for the logic and control circuits of the modules are supplied separately from the power mains by a coordinating computer which has the modules connected in a redundant ring topology.

This application discloses a three-phase balancing device, control method, apparatus, and medium. The three-phase balancing device includes a first control switch, the input terminal of which is connected to a three-phase input power supply; a second control switch, the input terminal of which is connected to the output terminal of the first control switch; a first AC contactor, the input terminal of which is connected to the input terminal of the second control switch; an energy-saving device, the input terminal of which is connected to the output terminal of the first AC contactor; a third control switch, the input terminal of which is connected to the output terminal of the energy-saving device, and the output terminal of which is connected to an external load; and a second AC contactor, the input terminal of which is connected between the first and second control switches, and the output terminal of which is connected to the external load. This application enables dynamic three-phase balancing.

The application relates to a control method and device of an MMC-DES integrated system, equipment, a storage medium and a product. The method comprises the following steps: determining a direct-current input current reference value corresponding to a desired output power of the MMC-DES integrated system; determining a global balancing current reference, an inter-phase balancing current reference and an intra-phase balancing current reference in the MMC-DES integrated system based on a global, inter-phase and intra-phase three-level energy balancing management mechanism of the MMC-DES integrated system; determining a bridge arm voltage reference value based on the direct-current input current reference value, the global balancing current reference, the inter-phase balancing current reference and the intra-phase balancing current reference; and controlling the MMC-DES integrated system based on the bridge arm voltage reference value. The method can realize stable operation of the system and reasonable distribution of energy.

A method and system for controlling the SOC balance within a phase of a chain energy storage system, wherein the chain energy storage system includes three-phase circuits A, B, and C, with multiple power submodules connected in series on each phase circuit. The method includes the following steps: collecting the SOC and voltage of the batteries in all power submodules in a single phase, and judging whether to activate the SOC balance control method within the phase based on the SOC and voltage; if the SOC balance control method within the phase is activated, judging the charge and discharge state of the bridge arm based on the direction of the bridge arm current and the direction of the modulation wave; sorting the power submodules from small to large according to the SOC of the batteries, and calculating the mean SOC of the batteries in all power submodules; when the bridge arm is in a discharging state, putting kN modules with the largest SOCs and (1‑k)N power submodules closest to the mean SOC into operation. The present invention can take into account both the modulation wave quality and the balancing speed during the intra-phase balancing process.

A strap for an electrical system, an electrical system with balanced phases, and a method for balancing phases of an electrical system are provided. The strap includes an elongated body having: a first end, the first end includes a hole, and the first end is configured for connection to a meter socket of the electrical system by a first fastener through the hole; and a second end, the second end includes a first slot with an opening and a second slot with an opening, and the opening of the first slot is opposite to the opening of the second slot, and the second end is configured for connection to a first upstream busbar of the electrical system by a second fastener through the first slot, or the second end is configured for connection to a second upstream busbar of the electrical system by a third fastener through the second slot.

The embodiment of the invention discloses an eight-path power divider, which adopts a ceramic bottom plate as a stable substrate and a ferrite magnetic core as a magnetic circuit core, and is combined with a specific winding layout and an impedance matching network, so that a signal distribution path is effectively optimized, energy loss and phase mismatch are reduced, and meanwhile, the isolation performance between ports and the mechanical stability are improved. The power divider has the advantages of low insertion loss, excellent phase balance degree, high isolation degree between ports and good environmental adaptability.

The invention discloses a three-phase balancing method and device for double-input power supply equipment and electronic equipment, and relates to the technical field of computers, and the method comprises the steps: determining module power corresponding to power supply modules connected with a current current distribution unit, and calculating the phase power of each phase in three phases of the current distribution unit; a reference phase power is obtained according to the three phase powers, and the phase deviation degree of each phase is obtained based on each phase power and the reference phase power. When it is detected that the phase deviation degree exceeds a preset adjustment threshold value, at least one target adjustment module is screened out; by adjusting the circuit relation between the target adjustment module and the current current distribution unit, three-phase balance adjustment can be carried out on the dual-input power supply equipment without rewiring in the dual-input power supply equipment; therefore, the problem of low efficiency of realizing three-phase balance of the double-input power supply equipment is solved.

The embodiment of the invention discloses a five-path power divider, which effectively solves the problems of non-uniform distribution of an electromagnetic field and infirm fixation of internal elements through the collaborative design of a ceramic bottom plate as a supporting base body and a ferrite magnetic core and a multi-coil winding in combination with the optimized layout of an impedance capacitor and an isolation resistor. Uniform distribution and high isolation of five paths of signals are achieved, the structural reliability is high, the signal distribution uniformity is good, the port isolation is excellent, and the phase balance degree is high.