560results about How to "Reliable power supply" patented technology

A position detecting system 10 for installation on a large vehicle 12 comprises a detector 14 for detecting a transmitter 32 on a vulnerable vehicle such as a bicycle 34, a processor for calculating the position of the bicycle relative to the large vehicle, and a user interface 100 for providing a visual indication of said position.

The invention provides a power distribution network overall planning method and system. The power distribution network overall planning method includes the steps: 1) dividing power supply areas; 2) determining the power supply area attribute and the planning strategy; 3) carding the present situation of grids; 4) predicting load; 5) determining the planning target; 6) dividing the power supply grids; 7) planning a power supply grid present situation wiring diagram and a target wiring diagram; 8) determining the planning scheme and the transitional scheme; 9) forming concrete implementation projects; and 10) compiling the line channel planning. The power distribution network overall planning method and system can systematically guide planning and construct a medium voltage power distribution network rack so as to guarantee reliability and firmness of the medium voltage power distribution network. The power distribution network overall planning method and system can construct a power distribution network with necessary capacity margin, proper load transferring capability, certain self-healing capability and emergency processing capability, and reasonable distributed power supply admission capability, and can safely, reliably and economically supply power for the user.

Methods and apparatuses that automatically determine the capabilities of UPS devices. Systems automatically determine whether a UPS device is capable of protecting system resources by comparing the UPS capabilities against system requirements. Such systems can use that determination to approximate how long a UPS device can reliably supply power. Systems having multiple UPS devices can be implemented such that the connections of the UPS devices to system resources are automatically determined, the load on each UPS device can be found, the capabilities of the UPS devices can be obtained, a comparison between UPS load and UPS capabilities can made, and a warning of problems can be sent. Using UPS capability and load information a system can provide for a controlled shutdown of system resources.

The invention relates to an auxiliary power supply system for a motor train unit and a power supply method and a load reducing method of the auxiliary power supply system. The auxiliary power supply system for the motor train unit comprises auxiliary current transformers, a bus I, a bus II, bus connectors, a contactor box, medium-voltage loads and a low-voltage power supply system. The bus I and the bus II penetrate through the whole auxiliary motor train unit through the bus connectors on the two sides of carriages. The auxiliary current transformers and the medium-voltage loads are connected with the bus I or the bus II alternately according to the parity number of the motor train unit carriages. Part of the medium-voltage loads of the motor train unit operate in a load reducing mode or are directly disconnected when the auxiliary current transformers break down. The auxiliary power supply system operates in a parallel connection mode through the buses penetrating through the whole auxiliary motor train unit, the relative concentration and flexible arrangement eliminating mode of the motor train unit is achieved, the requirement for the redundancy of each set of auxiliary current exchanging system is low, the economic cost is greatly reduced, the power supply of the whole train unit is stable and reliable, and the passenger comfort level and the running safety coefficient of the motor train unit are guaranteed.

A circuit array, comprising a substrate (101), and comprising an electrically conducting folded dipole antenna (103) arranged on and/or in the substrate (101), the folded dipole antenna (103) having a first antenna connection (104) and having a second antenna connection (105), and wherein the folded dipole antenna (103) has a disconnected portion (108) dividing the folded dipole antenna (103) in a first antenna portion (109) and in a second antenna portion (110) such that a capacity (111) is formed at the disconnected portion (108) between the first antenna portion (109) and the second antenna portion (110), wherein an integrated circuit (102) can be or is arranged on the substrate (101), the integrated circuit (102) having a first integrated circuit connection (106) connected to the first antenna connection (104) and having a second integrated circuit connection (107) connected to the second antenna connection (105).

The invention relates to solar photovoltaic generating applications, and in particular relates to a multi-mode photovoltaic generating system, wherein the multi-mode photovoltaic generating system mainly adopts off-grid power generation, and can release gird-connected power generation as for the surplus electric energy which is not consumed completely by a DC (direct-current) emergency load and storage batteries. The system comprises a controller, solar-cell arrays, a storage battery, the DC emergency load, a grid-connected inverter and a public distribution network, wherein a part of DC electric energy output by the solar-cell arrays is supplied for the DC emergency load by a DC bus, and the other part of the DC electric energy output by the solar-cell arrays is stored in the storage batteries. When the voltage of the DC bus is out of the normal range, the storage batteries supply the energy for the DC emergency load by a charge-discharge controller; and when the storage batteries finish the charging and the voltage of the DC bus is within the normal range, the surplus DC electric energy can be converted into AC (alternating-current) electric energy by a DC boost converter and a grid-connected inverter and then the AC electric energy is transmitted to the public distribution network. The system provided by the invention can improve the efficiency and the time of annual power generation of the system, and has good application prospects.

The invention discloses a global optimization and dispatching method based on time scales. The time scale based global optimization and dispatching method disclosed herein, relies on a target value system and a dispatch model. The global optimization and dispatching method depends on the results from a variety of subtopics. The methods provide adjustment and optimization in accordance with the time scales that are given in the sub goal of each sub topic: long-term, mid-long-term, short-term, ultra short term and real time optimization. Smart distribution grid can improve operational efficiency, integrated application of new elements in the distribution network of distribution energy network, micro grid, energy storage device and non-linear loads. This invention is fully adapted to the smart grid trends, with a good prospective.

The invention relates to a power distribution network distribution circuit fault location system, including a plurality of measurement communication units A, PC and GSM terminals C. The input ends of the signal capture module of each measurement and communication unit are respectively connected with the auxiliary terminals of the three phase of the distributing transformer to be measured; messages are transmitted between the GSM module of each measurement and communication unit and the GSM module of PC and GSM terminals in a wireless communication mode. The inventive fault location includes: establishing a main wiring scheme according to the power supply power tidal current direction and connected relation of the transformer and bus, and endowing geographical information to each transformer; establishing an associated matrix, condition matrix and fault point locating matrix, locating the position of the fault by the fault point locating matrix, thereby implementing power distribution network distribution circuit remote failure diagnosis and locating, rapidity judging the fault section, saving maintenance time and having an effective function to the safe stable operation of the electrical distribution network.

The invention relates to a non-contact multiple input voltage source type resonant converter, belonging to the electric energy transformation field. The resonant converter comprises a primary side circuit, a multiple winding non-contact transformer (4) and a secondary side circuit; wherein the primary side circuit is composed of n energy input branches, each branch is formed by sequentially connecting an input source (1), a voltage source type contravariant bridge (2) and a primary resonant network (3) on one primary side winding of the multiple winding non-contact transformer (4) in series; nprimary side windings of the multiple winding non-contact transformer (4) are tightly coupled, the primary side and the secondary side are relatively movable; the secondary side circuit is formed bysequentially connecting a secondary side resonant network (5) and a rectifying and filtering circuit (6) in series; and in the n energy input branches, the primary side resonant networks of at least n-1 branches includes a series inductance. Inherent current source characteristic of the voltage source type resonant converter and tightly coupled primary side multiple winding realize multiple inputsource time-sharing/simultaneous multiple mode power supply; and non-contact power supply ensures safety and convenience.

The invention relates to the field of planning and dispatching of a power grid, and discloses a method for dispatching power grid pitch peak capability based on large-scale wind power sychronization. The method comprises the following steps: (1) setting the pitch peak capacity provided by hydropower for wind power as F, and the sum of wind power and hydropower as a definite value, F plus Q; leading Wa plus Wi to be more than or equal to (F plus Q) multiplied by 24, conducting pilot calculation on maximum output Fa of wind power allowed by the power grid; (2) substituting Fa into an analog computation model run by a given power grid system, carrying out calculation to obtain load rate of fire power with a light load and a difference F fire between fire power output and fire power minimum output under the load rate, which are taken as the pitch peak capacity provided by the fire power for wind power; and (3) when F fire is less than 0, decreasing wind power output Fa value capable of being balanced by hydropower, and repeating the step (2) until F fire is more than or equal to 0, thus obtaining the total pitch peak capacity provided by the given power grid system for wind power: total F equals to Fa plus F fire, wherein total F is wind power capacity capable of being integrated into the given power grid system.

The invention relates to a method for online monitoring work state of an on-load tap-changer and early warning. The method comprises the following steps: 1. real-time acquiring voltages and current parameters of a branch element of a transition contact of the on-load tap-changer; 2. based on the acquired voltages and current parameters, computing the following parameters: a transition resistance, a transition time, a transition waveform, a three phase synchronization, a contact resistance, an action program; 3. determining the state of a device and communicating with the outside by using a communication module through the on-load tap-changer main body, implementing real-time monitoring whether the on-load tap-changer is working normally so as to send an alarm in time and turn off the device for maintenance, and establishing an early warning mechanism. According to the invention, the method implements online monitoring of OLTC work state, acquires OLTC real-time device parameters, and determines whether OLTC works normally so as to turn off the device for maintenance, prevents occurrence of accidents, and lowers property loss. At the same time, the method conducts analysis and computing on historical data, establishes the early warning mechanism prior to events, and exits an operation state in advance.

The invention relates to a ship DC integrated power propulsion system and a protection design method of the system, and solves the problem that the existing protection methods cannot achieve selectiveprotection of DC integrated power systems. The protection of each frequency conversion module of the DC-side busbar uses fuses as protection devices, and the protection of the generator and its output-side cables is achieved by detecting the imbalance of phase-to-phase current or phase-to-phase voltage by a self-developed generator protection device. In the case of a short-circuit fault of the DCbusbar itself, the invention proposes two protection schemes based on a fuse with an isolating switch and a solid-state circuit breaker. The protection of the propulsion motor and the load-side equipment can be realized by an inverter unit, and the DC system protection design scheme is realized by the methods such as insulation detection in conjunction with a comprehensive control system for theground fault, so that the non-fault side busbar can continuously power while the short-circuit fault is accurately and quickly removed, thereby realizing the system protection selective scheme and ensuing the reliability and safety of the power supply of the ship's power system.

The invention relates to a method for predicting the influence of disasters to a power system based on an improved AHP-anti-entropy weight, and belongs to the field of power transmission and distribution grids. To overcome the defect that the existing evaluation method is too subjective, further improvement is made in the invention. Thus, the method of the invention adapts to actual evaluation and horizontal comparison on influences of natural disasters to grids in various districts, can be adopted to analyze the advantages and disadvantages of development of the grids and find out the weak links of the grids, is a good guide to future grid planning and strong grid establishing, enhances the power supply reliability of the power system, especially the power supply reliability of the power system under the condition of disasters, and improves the investment income of the grids.

The invention provides a reactive compensation configuration method based on a reactive voltage feature for a wind power 500kV collecting transformer substation. The method comprises the following steps: determining the access capacity and access position of wind power accessing a power grid; determining inductive reactive compensation capacity and capacitive reactive compensation capacity needed by the power grid; determining the type and the capacity of reactive compensation equipment; determining a coordination control strategy of the reactive compensation equipment; detecting the stability of a wind power grid-connected system. By adopting the method, a reactive compensation configuration scheme is determined for the 500kV collecting transformer substation, so that a technical line is provide for the reactive compensation configuration scheme of the 500kV collecting transformer substation after the wind power accesses the power grid, and stable running after wind power grid connection is ensured.

A power outage plan optimization decision method aiming at reducing power outage time and quantity comprises the following steps: reading the topology information of a distribution network, and establishing the contact relationship between distribution network components in a region to be evaluated to form a contact matrix; reading the information of each load point in the distribution network; reading power outage event information; for each type of power outage events, reading the information of maintenance teams in the region to be evaluated (including the number BN of the maintenance teams in the region to be evaluated, the ability of the maintenance teams and the daily workload of the maintenance teams), and making clear the power outage strategy in the region to be evaluated; optimizing the power outage period; optimizing the power outage order; and displaying the result. The method takes the user's power outage time, the user satisfaction and the team's ability into full consideration, and adopts simultaneous maintenance. For different power outage events, the execution time of each power outage time is optimized based on the daily load curve of an affected region. Thus, the power outage time and power outage quantity of the system are reduced effectively, reliable power supply of the system is ensured, and the customer satisfaction is improved.

The invention provides an ecological restoration system for a riverway and a restoration method thereof. The ecological restoration system comprises a new energy source power generation device, an electrical control device, a water quality online detection system, an aeration device, a microorganism culture device and a support device, wherein the support device comprises a floating body worktable; the aeration device comprises an air blower; the new energy source power generation device, the electrical control device, the water quality online detection system and the air blower are respectively arranged at the upper surface of the floating body worktable; the microorganism culture device is arranged at the lower surface of the floating body worktable. The ecological restoration system hasthe beneficial effects that 1, the anaerobic and aerobic bacteria are directionally cultured by microorganisms through a novel riverway control technology, so as to eliminate the bottom sludge and the pollution to the water body, and break through the riverway control limitation of the conventional single aerobic biochemical method; 2, the clean solar energy and a wind power generation system areadopted, so as to maintain stable and reliable power supply, and save the electric energy.

A lossless equalization controller and a control method belong to the technical field of battery equalization control. The controller comprises a battery pack formed by a plurality of cells, an equalization switch control module, an equalization power control module, an equalization power transformation module, an equalization charging control module, a system power supply module and a master control module, wherein the system power supply module supplies power to the equalization switch control module, the equalization charging control module and the master control module. The controller has the advantages of rapid equalization speed, safe and reliable equalization process, low cost and easy promotion and application. The control method includes detecting battery equalization degree, equalizing laggard cells in the battery pack when the battery equalization degree is equal to or greater than 0.3%, detecting system fault, clearing system fault and other detection steps. The equalization precision is high, and the equalization process is safe and reliable.

The invention relates to a fast switching method of transformer substation power, Firstly defining a combined ring manner; if the combined ring condition is satisfied, designating the switch-on of the combined ring breaker; if the unlink ring condition is satisfied, designating the tripping operation of the unlink ring breaker; judging whether the power switching has succeeded according to the operating position and current of the designated unlink ring breaker, and two bus voltage signals after a delay time of 0.1-0.5s; if the designated unlink ring breaker skips position without current, and the two bus voltages are normal, the power switching succeeds; if the designated unlink ring breaker is on and the two bus voltages are abnormal, it supplies prover after a delay time of 0.5-2s and the combined ring has finished. The invention carries out the combined ring operation switch of the power supply according to the designed instruction and program before the action of the relay protective device, so as to guarantee the reliability of the electrical network supply, which may be used in various forms of power fast switchings under the layered partition operation of the electrical network.