38 results about "Power reliability" patented technology

The invention provides a circuit reducing electromagnetic interference and increasing peak power through adjusting pulse. The circuit reducing ACDC power source electromagnetic interference and improving instantaneous power through adjusting PWM working pulses includes a signal input terminal, a signal output terminal, a power supply line, a pulse counting control unit, an auxiliary power source energy saving unit, a pulse group delay unit, a temperature protection unit and an oscillator. The pulse counting control unit and the pulse group delay unit is used for adjusting pulses in the pulse width modulation process and reduces electromagnetic interference of the circuit. The pulse number of one period of the pulse counting control unit is increased, the power output to the load is increased additionaly. On the other hand, the pulse group delay unit changes starting time of each group of pulses so as to reduce integral radiation. An auxiliary power energy saving unit can improve power reliability and reduce power consumption.

The invention discloses a distributed battery management system, which includes a main control module and at least one slave control module, each slave control module manages a group of battery packs in series, the battery packs are connected in series in the power circuit, the main control module, each slave control module The control modules are respectively connected to the power circuits, and the master control module can communicate with the slave control modules through two power circuits in opposite directions. Compared with the prior art, the present invention realizes the communication of the distributed battery management system through the power circuit without the traditional low-voltage communication and power supply wiring harness, reduces the complexity of wiring, and uses the communication signal to accurately communicate the power circuit. The broken state monitoring and broken point location significantly improve the communication and power supply reliability of the battery management system.

The invention discloses a resident intelligent energy management system suitable for an intelligent power grid. Due to the adoption of the resident intelligent energy management system, peak and off peak load regulation of a power load is realized, and the power quality and power reliability are improved. An intelligent energy management controller and an intelligent electric meter are arranged in the home of each resident; a control terminal is arranged on each controllable domestic appliance and a user switch respectively; a distributed power supply accessing device is arranged on each distributed power supply; the controller is connected with the control terminal and the distributed power accessing device through a Zigbee wireless communication network; the intelligent electric meter is connected with the distributed power supply accessing device and the controllable domestic appliance; the controller is communicated with the intelligent electric meter through a bus; the intelligent electric meter is further connected with the secondary sides of a voltage mutual inductor and a current mutual inductor; the controller undergoes information interaction with a high-level measuring system AMI (Advanced Metering Infrastructure) of a main station through Ethernet communication; the controller is used for controlling switching of the control terminal and the distributed power supply accessing device; the control terminal is used for submitting the state of the switch to the controller; the controller is used for monitoring the state of the switch.

The invention discloses a waveguide switch with a heat dissipating device, and aims to effectively solve the problem of heat dissipation when the waveguide switch transmits high-power radio frequency signals. The heat dissipating device comprises an inner ring, an outer ring and a heat dissipating wire. The heat dissipating device is mounted at the bottom of the waveguide switch, can quickly transmit heat generated by high-power radio frequency signals to an outer casing of a guided stator of the waveguide switch, effectively reduce the temperature difference between a guided rotor and the guided stator, and avoid rotational failures of the waveguide switch, due to expansion of parts caused by over temperature. The waveguide switch provided by the invention has the advantages of simple structure and light weight, unnecessary nonmetallic materials are not used, the heat dissipation potential of the waveguide switch under high-power working conditions is effectively improved, and the overall high-power reliability of the waveguide switch is improved.

The invention discloses a loudspeaker diaphragm which comprises a ball top part (20) in the center and a folding part (10) at the rim. The folding part (10) is a single layer structure made from a TPEE (thermoplastic polyester elastomer) material layer (2) or is a composite structure provided with at least one TPEE material layer (2). Compared with diaphragms made from TPU materials, the diaphragm of the invention has good toughness and strength, can effectively reduce the vibration frequency, and expand the bandwidth of a product. Further, the diaphragm is also stable in structure and reliable in withstanding power and provides good stability of vibration frequency.

The invention provides a fault processing method, device and flexible direct current transmission system. The method includes: responding to the fault signal of the flexible direct current transmission system, blocking the fault processing sub-module; obtaining the current of the transmission line; based on the current falling to the first current threshold, controlling the fault processing sub-module to switch to uncontrolled rectification after the deionization time The operation mode; determine the fault state of the flexible direct current transmission system according to the current; control the fault processing sub-module according to the fault state. Therefore, it is possible to identify the fault state after the end of the deionization stage, unlock only after it is judged as a transient fault, and re-block the faulty pole converter after it is judged as a permanent fault, isolate the faulty line, and realize the automatic failure of the flexible DC transmission system. Adaptive recovery avoids unnecessary shocks and delays in stability control actions caused by repeated recovery operations under permanent faults, which is conducive to improving system stability and power supply reliability.

The invention relates to a power monitoring system based on a big data fusion model. The system is divided into three layers: a field device layer, a communication management layer and a system management layer; the system adopts the CoxPH algorithm based on deep learning to analyze the received data. Extracting eigenvalues ​​can complete various practical functions such as switch status monitoring, analog quantity acquisition, comprehensive protection monitoring, remote control, alarm management, curve bar graph analysis, report generation, statistical printing, user management, accident recall, etc. Power reliability, improved power management efficiency, improved power supply quality, and reduced operation and maintenance costs.

A rapid calculation method for an electric power reliability index based on the multithread processing of cache data, which solves the problem of low analysis and calculation efficiency of an electric power reliability index. The method comprises: creating a data cache area in a memory, dividing same according to service data types, and using a management unit, a device registration date or power-cut generation date as primary keys, so as to establish data blocks; establishing a change buffer area in each data block, recording a data change, and merging the change buffer area data with basic data at a definite time; and averagely allocating to a plurality of threads the data which is related to index calculation, so as to conduct basic index calculation, and then, merging the basic index calculation result of each thread, so as to calculate the comprehensive reliability index of each level of management unit. By means of the technical means of multi-data block caching service data, a data change buffer area and multithread processing, the basic data retrieval and calculation efficiency of an electric power reliability service are improved, thereby achieving the rapid calculation of an electric power reliability index.

The embodiment of the invention provides an urban power grid reliability evaluation method taking power generation, power transmission and power distribution systems into integrated consideration. The method mainly comprises the following steps: first of all, an urban power grid is divided into a power transmission network layer, a high-voltage distribution network layer and an intermediate-voltage distribution network layer; according to data of a power transmission network, calculating a reliability index of the power transmission network layer by use of a set algorithm, and converting the reliability index at a bus of the power transmission network layer into a power supply of the high-voltage distribution network layer through an equivalent power supply mode; converting a reliability index of a terminal bus at the high-voltage distribution network layer into a power supply of the intermediate -voltage distribution network layer through an equivalent power supply mode; and according to data of the intermediate-voltage distribution network layer, calculating a reliability index of the intermediate-voltage distribution network layer by use of the set algorithm. The urban power grid integrated reliability evaluation method provided by the embodiment of the invention effectively avoids the defect of only individual reliability evaluation of a power transmission network or a power distribution network, takes influences exerted by the power transmission network on the power distribution network into integrated consideration, and can truly reflect the power reliability of a power system.

The invention discloses an UHV DC fault scheduling method based on aggregated constant temperature control load, and belongs to the field of power system emergency scheduling. The invention comprises the steps of: establishing a reliability model of UHV transmission power based on the failure probability of UHV components; modeling the individual dispatching capacity of constant temperature control loads based on the electrothermal characteristics; The constant temperature control load is aggregated and modeled to determine the overall dispatch capacity of the constant temperature control load; based on the optimal power flow model, the aggregate constant temperature control load dispatch model is combined with the traditional unit dispatch to obtain the optimal dispatch plan in the event of a UHV DC system failure And evaluate the degree to which the constant temperature control load participates in dispatching. This technical solution evaluates the degree to which the constant temperature control load participates in dispatching, improves the total dispatching capacity of the system, effectively improves the operation reliability of the receiving end network of the UHV DC system, and can reduce the total dispatching cost of the system.