53 results about "Electric power system" patented technology

A radio communication apparatus includes a receiving section, a power supply section and a control section. The receiving section receives a radio signal when electric power is supplied, and the radio signal has a preamble field for storing a preamble pattern. The power supply section supplies the electrical power to the receiving section and stopping the supply of the electrical power in response to a supply stop signal. The control section generates the supply stop signal when presence of the preamble pattern can not be detected from the radio signal received by the receiving section, in a state in which a frame synchronization is established.

The invention relates to a graph interactive realization method, in particular to a method for multiplexing CIM documents and geographic or plant-station SVG graphs which are outputted by an EMS system in the power industry and based on the IEC61970 standard in a DMIS/OMS system and converting the CIM documents and the geographic or plant-station SVG graphs into SVG graphs which meet the interactive demand of the DMIS/OMS system. The method is characterized by comprising the following steps: firstly, models of the DMIS/OMS and an EMS are synchronized with graphic information and associated with equipment; secondly, SVG graph documents undergo normalizing processing so that the interaction of the SVG graphs outputted by the EMS system is improved, so as to make the SVG graphs directly multiplexed in the application scene of the DMIS/OMS system; and thirdly, the SVG graph documents are compressed. The graph interactive realization method can guarantee synchronous update of the models of the DMIS/OMS and the EMS and the graphic information, and changes the condition that the related models and the related graphic information are required to be manually synchronized in the prior art.

The invention relates to a multi-target random fuzzy dynamic optimal energy flow modeling and solving method for a multi-energy coupling transmission and distribution network and belongs to the field of day-ahead scheduling plan research of electric power systems in an energy interconnection environment. The method comprises the following steps: basic data in a system scheduling period are obtained,; random fuzzy space-time sequence models for large-scale wind power, distributed power source and multi-energy loads are obtained via historical data mining; power and voltages of a power transmission network and all active distribution networks at joint nodes are used as share variables; multi-target SoS dynamic optimal energy flow models characterized by high economic performance, low carbon emission, renewable energy absorption, loss reduction and the like are built within static state security constraints; multi-energy source charge forecast can be realized through random fuzzy simulation; a Pareto solution set, an optimal compromise solution and an energy flow result can be obtained via adoption of an improved SoS layered optimizetion algorithm based on approximate dynamic programming and NSGA-11. The method can adapt to a development trend of energy interconnection, and comprehensive coordination optimization of day-ahead scheduling of transmission and distribution parties can be realized on the premise that requirements for static state safety and stabilization of systems can be satisfied.

An electric power-steering controller eliminates steering components from a dynamic state quantity such as a rotation speed signal using a small-amplitude filter for filtering small-amplitude components, and accurately extracts only vibration components which are smaller than the steering components in amplitude, thereby reducing the vibration components through a control operation.

The invention discloses a power system real-time picture Web interface showing method. The method mainly includes the steps that electrical equipment is monitored and state data of the electrical equipment are collected by a back-end server; the real-time data are rendered by a real-time picture issuing server to form a complete interface layer; after it is detected that a real-time picture issuing server website is input through terminal equipment, an interface control script is sent by the real-time picture issuing server to acquire the size and resolution ratio information of the terminal equipment, and a virtual picture same with the terminal equipment in size is drawn according to the size and resolution rate information and is sent to the terminal equipment through the virtual interface; the virtual picture is received by the terminal equipment, and the virtual picture is rendered through the canvas function of a browser kernel. Files suitable for the picture size of the terminal equipment can be output through the power system real-time picture Web interface showing method according to the screen size and resolution ratio information of the terminal equipment.

The invention relates to a voltage stability assessment method based on thevenin equivalence and branch transmission power limits. The method comprises the steps of obtaining relative power margins of all load nodes of an electric system, and selecting the minimum value of the relative power margins as a voltage stability index of the electric system, wherein the larger the voltage stability index is, the higher the voltage stability of the electric system is; according to the step of obtaining the relative power margins, 1, thevenin equivalence parameters of load nodes to be assessed are obtained; 2, a two-node system containing the load nodes to be assessed is constructed by means of the thevenin equivalence parameters, a power balance equation is analyzed, and a quiescent voltage stability discriminant is obtained; 3, branch transmission power limits of the two-node system are obtained through calculation of the quiescent voltage stability discriminant, and the relative power margins of the load nodes to be assessed are obtained. Compared with the prior art, no local measurement data is needed, calculation is rapid and convenient, assessment indexes containing the limit transmission power are given, and online voltage stability assessment of a power grid is achieved.

The invention discloses an improved CIM-based power data processing method. The method comprises the steps of firstly performing storage by type on data in different systems according to data sourcesand attributes; secondly performing data extraction, cleaning, transformation and loading in sequence to build an improved CIM; and finally finishing ETL of data of different system sources by utilizing the improved CIM on an integrated bus. The CIM of a power system is introduced in the ETL process, so that the problem that data models cannot be unified when power system data of diversified sources is processed in a conventional ETL method is solved, the overall effect of the ETL process is improved, and the power data is efficiently integrated.

The invention provides a transformer substation monitoring device, method and system and relates to the technical field of electric power. The device comprises a sedimentation acquisition unit, a horizontal displacement acquisition unit, a data processor and a display device, wherein the sedimentation acquisition unit is arranged at an underground position of a monitoring point and is used for acquiring sedimentation data of the monitoring point; the horizontal displacement acquisition unit is arranged at a ground surface position of the monitoring point and is used for acquiring horizontal displacement data of the monitoring point; the data processor is used for obtaining the sedimentation data and the horizontal displacement data and displaying the sedimentation data and the horizontal displacement data through the display device, and is also used for sending the sedimentation data and the horizontal displacement data to a remote terminal through a wireless manner so as to carry out analysis and early warning on the sedimentation data and the horizontal displacement data by the remote terminal. According to the transformer substation monitoring device, method and system, the sedimentation data and the horizontal displacement data of a transformer substation foundation can be acquired in real time and the analysis and early warning on the data are carried out by the remote terminal, and hidden dangers can be found in time so that operation safety of an electric power system is ensured.

The invention relates to an automatically adjustable stroke yoke plate for electric power lines in a mining influence region, belongs to the technical field of electric power system equipment, and particularly relates to equipment used by straight line pole towers in the mining influencing region and a poor geological condition region for the electric power lines. In order to solve the technical problems, the invention provides a device capable of automatically regulating the suspension string offset. The yoke plate has the technical scheme that the automatically adjustable stroke yoke plate for electric power lines in the mining influence region is characterized in that the upper part of a yoke plate body is provided with a dimension identifier, the lower part of the yoke plate body is provided with a pulley groove used for containing a pulley, the top of a specially made connecting hardware is connected with the pulley through a connecting screw bolt, in addition, the specially made connecting hardware is positioned under the yoke plate body, the bottom of the specially made connecting hardware is connected with a connecting hardware, the middle part of the dimension identifier of the yoke plate body is provided with a dimension identifier indicating device, and the top of the specially made connecting hardware is provided with a specially made connecting hardware identifier indicating device. The yoke plate is applied to straight line pole towers in the mining influencing region and the poor geological condition region for the electric power lines.

The invention relates to a link reusing method for a distributed agent, and the method comprises the steps: enabling scheduling mechanisms in different regions to employ dynamic agency services to form distributed agents; enabling a local client to visit an application of a nonlocal scheduling mechanism, and building two TCP links between two agency services: a positive link and a negative link; building a session, wherein the request message of the session is transmitted to the dynamic agency service of the nonlocal scheduling mechanism through the positive link, and a response message of the session is transmitted to a dynamic agency service of the local scheduling mechanism through the negative link; enabling the distributed agent to build the other session when a client of the nonlocal scheduling mechanism visits the local application, and employing the same TCP link. In a link sharing mode, the two different scheduling mechanisms theoretically just has two TCP links, so as to support the bidirectional communication between agents, thereby improving the efficiency of information interaction between different regions and between scheduling mechanisms at different levels, and improving the operation safety of a power system.

The invention discloses a method and a system for measuring harmonics of a power system. The method comprises the following steps of synchronously sampling power signals to generate a synchronous data sequence; enabling the length of the synchronous data sequence in a unit fundamental wave cycle to be equivalent with the unit time length, and generating equivalent fundamental wave frequency; multiplying the synchronous data sequence by a preset window function data sequence, and to generate a window data sequence; performing multiple integer calculation on the window data sequence to generate the equivalent harmonics frequency amplitude; obtaining the ratio of the equivalent harmonics frequency amplitude and the equivalent fundamental wave frequency amplitude, so as to measure the harmonics. The method and the system can improve the harmonic measuring speed.

The invention relates to a passive audible and visual alarm temperature indicating device used for monitoring the temperature of electrical connectors among power supply unit parts in a power system.The temperature indicating device is composed of an induction power supply, a voltage stabilizing part, a temperature detection part, an audible alarm system and a luminescent display part, and has the advantages of high temperature measurement accuracy, good safety, obvious effect with common action of audible prompt and visual prompt no matter in the day or night, an audible and visual alarm given in the case of overheat occurred on a connecting point of electrical equipment, and no need of independently adding an external power supply, thus guaranteeing long-term use of the device without need of maintenance; and the device further has the advantages of repeated use, long service life and extremely low energy consumption relative to a disposable temperature indicating wax piece. Only anew temperature measuring element is required for replacement even though the accidental temperature of a contact point is suddenly risen to burn down the temperature measuring element; and temperature detection can be realized only by pasting the temperature measuring element to a heating part to be detected, thus the device is convenient in use.

A charged particle separation apparatus that separates ionized gas clusters is disclosed. The charged particle separation apparatus includes three or more electric field applying parts arranged in an incident direction of an ionized gas cluster, wherein each of the electric field applying parts includes a pair of electrodes; an electric power source configured to supply alternating-current electric voltages to the three or more electric field applying parts in such a manner that an alternating-current electric voltage applied across one pair of the electrodes of one of the three or more electric field applying parts is different in phase from an alternating-current voltage applied across another pair of the electrodes of an adjacent one of the three or more electric field applying parts; and a plate including an opening in an extension of the incident direction.

The present invention relates to a single-phase electricity energy meter based on the internet, belongs to the electric power system field. The present invention provides a power supply for a singlechip and an electricity energy measuring chip through the power supply chip, a clock chip provides the clock impulse for a memory chip and the singlechip. The electricity energy measuring chip and a voltage mutual inductor collect signals from an outer power grid. The present invention reads and processes information through the singlechip, stores the information through a singlechip bus, then outputs the information to a relay and a display through a univerall pipe foot of the singlechip. Finally the singlechip is connected with the internet connected with a PC through an electromagnetic isolation transformer and a connector. When the electricity energy meter cannot work, the communication can be resumed by testing the infrared communication chip. The electricity energy meter can improve the service quality, can realize the online management, and can improve the work efficiency.

A facility comprises an inactive gas supplying device configured to supply inert gas to a container, a transport device configured to carry a container into, and out of, a storage section, a first controller configured to control the transport device, a second controller configured to control the inactive gas supplying device, and a third controller configured to transmit a first command to the first controller through a communications relay device, and to transmit a second command to the second controller Hp. The transport device receives electric power from the first electric power supply whereas the inactive gas supplying device, the second controller, the third controller, and the communications relay device receive electric power from one or more different-path electric power supplies each of which is different from the first electric power supply.

The embodiment of the invention discloses wearable equipment. The wearable equipment comprises a power receiving module, a first power storage module and a first functional module, wherein the power receiving module is configured to receive electric power generated by a mobile terminal according to a preset charging strategy; the first power storage module is configured to store the electric powerreceived by the power receiving module; the first functional module is configured to utilize the electric power stored by the first power storage module to achieve preset functions of the wearable equipment. Due to the fact that the wearable equipment can be charged through the mobile terminal, the activity range cannot be limited, and the user experience is improved. In addition, the embodimentof the invention further provides the mobile terminal and a charging system.

An objective of the present invention is to provide an energy conversion and storage equipment which is capable of efficiently generating hydrogen using varying electric power generated from renewable energy and is capable of storing the hydrogen. The invention is an apparatus for converting and storing renewable energy in which hydrogen is produced with a water electrolysis device using the varying electric power generated in renewable-energy equipment and the hydrogen is stored, the apparatus being characterized in that the water electrolysis device includes an oxygen generation electrode which comprises an Ir—Mn alloy oxide. Due to the application of the electrode, with which water can be electrolyzed using the varying electric power generated from renewable energy, the system suffers little electrode deterioration even when the varying electric power is used, and it is possible to highly efficiently produce and store hydrogen for a long period.

The invention belongs to the field of power system operation and regulation and control, and discloses a distributed regulation and control parameter optimization method for inhibiting load over-response. The method comprises the following steps that loads with continuously adjustable power in a micro-grid and delayed loads are regulated and controlled jointly, and a load demand response model is established; based on a double-delay depth deterministic strategy gradient algorithm of deep reinforcement learning, regulation and control parameter optimization of each node load in the microgrid is carried out, auxiliary regulation and control parameters are formulated, the maximum power upper limit of the load with continuous and adjustable power and/or the maximum transferable time upper limit of the load with delayed use are/is changed, and the network congestion and the network loss of the micro-grid are reduced.

The invention discloses a large wind farm equivalence method for online safety analysis based on station topology, belonging to the technical field of power system operation control. The method comprises the steps of grouping according to the topology connection relation between a unit and a terminal transformer and a feeder, grouping wind turbine units in each group according to start and shutdown states, rated active power, stability parameters, a protection constant value, a type, active power and a pitch angle, obtaining the grouping information comprising unit grouping in a wind field, grouping in a group and unit division in a group, obtaining an equivalent wind power unit corresponding to each group and parameters of rated active power, active power upper and lower limits, active power and reactive power of an equivalent terminal transformer on the above basis, and outputting a grouping result. According to the method, the calculation speed and calculation precision are comprehensively considered, while the speed of simulation calculation is ensured, the simulation accuracy can be effectively improved, and the method is suitable for power grid on-line safety analysis and calculation.

The invention belongs to the technical field of electrical power system informationization technology and efficient energy conservation, and relates to a coal mill multiparameter operation optimization energy-saving system. The coal mill multiparameter operation optimization energy-saving system comprises a system body which is connected with a power plant plant-level monitoring system. The coal mill multiparameter operation optimization energy-saving system is characterized by comprising an application server, a database server and a plurality of application terminals, wherein the application server is respectively connected with a relational database, a plurality of application terminals and a real-time database device in the power plant plant-level monitoring system. Coal mill operation optimization suggestions are given; through actuating the optimization suggestions, a coal mill keeps to operate under the best working condition for a long time; the coal mill electricity consumption is lowered obviously, the effects of a coal pulverizing system are ensured, the safety and reliability of the coal mill are improved; through the actual application in a plurality of thermal power plants, the electricity consumption rate of the coal mill can be reduced by 15% around on average, and the coal mill failure rate is reduced by 20% above; and the coal mill multiparameter operation optimization energy-saving system has better economic benefit.