查询词典 power supply

According to the requirement of power supply company, the authors propose a concept of weekly market by which the impact of price elasticity matrix of demand side on power purchase decision-making under time-of-use price is led into the optimization of power supply company's power purchase from weekly market, and a multi-objective stochastic optimization model for power purchase from weekly market in which the price elasticity matrix of demand side and risk are considered.

根据供电公司购售电业务的工作需要提出了周市场的概念，首次将分时电价下需求侧电量电价弹性矩阵对购电决策的影响引入供电公司周市场购电优化中，并建立了计及需求侧E矩阵与风险的周市场购电多目标随机优化模型。

Therefore, this thesis raises "commercial power and DC remote power supply" which is off-line power mode of Uninterruptible Power Supply to resolve the problems of PAS CS power failure.

为此本文提出以"市电+直流远程供电"离线式UPS电源，解决小灵通基站停电问题。

In the design of the power supply, the main circuit topology frame uses half-bridge series resonant switching and parallel load connection, in which, an IGBT is adopted as the power switches, and features high operation frequency, high output power and fast response. In addition, the IGBT in the switch mode power supply has no hard turn-on or turn –off situation in transition, thus the disturbance to the power system is avoided.

相应的激光电源采用半桥软开关技术，串联谐振并联输出，IGBT 为主控制元件，实现了高频工作、高功率多路输出，响应快速；脉冲模式工作时避免了开关管的硬开关，减小了高次谐波对电网的干扰；无需镇流电阻也可实现气体稳定放电等特性。

In the design of the power supply, the main circuit topology frame uses full-bridge series resonant switching and parallel load connection, in which, four MOSFETs are adopted as the power switches, and by four pulses which UC3879 produces, high frequency operation and fast response are realized. In addition, the MOSFET in the switching power supply has no hard turn-on or turn-off situation in transition, thus the disturbance to the power system is avoided. Especially,by the use of high frequency transformer, PQ50/50, the switching power system can provide the steady discharge current without any amperite.

此开关电源采用全桥软开关技术、串联谐振并联输出，四个MOSFET管为主控制开关元件，通过脉冲产生电路UC3879产生的四路相关脉冲实现了高频交替开关，同时能快速响应输出的各种变化；避免了开关管的硬开关，提高了转换效率，另外通过采用高频变压器PQ50/50隔离了原副边，减小了高次谐波对电网干扰；无需镇流电阻也可实现气体稳定放电。

For reducing the LEMP lighting electromagnetic pulse radiation, the electrical source uses the Box-type power supply arrester, the power supply arrester and the modular power supply arrester as the third SPD surge protection device. The Low-voltage surge arrester or spark gap is laid between the compute net and equipotential grounding grids for avoiding signal interference and counterattack of ground voltage. The parameter and model of the signal lighting-protector of lines of communication are chosen according to the transfer rate, work level and characteristic impedance.

对控制房和DCS柜采用避雷针、独立针的直接雷防护；系统电源分别采用箱式电源避雷器、电源避雷器、模块式电源避雷器作为三级电源保护，减少LEMP雷电电磁脉冲辐射；计算机网络与等电位地网间设置低压避雷器或火花隙防止信号干扰和避免地电压反击；根据传输速率、工作电平、特性阻抗等，选择通信线路的信号防雷保护器的参数和型号。

After the balance and symmetry on operation function is realized with unsymmetrical structure, the transformer can be made not only for BT power supply, but also for AT power supply, which can meet the requirement of 2-phase power-supply system.

行功能上的平衡与对称，它既可制造成用于铁路电气化"BT"或直接供电方式供电的产品，又能制造成按"AT"供电方式的产品，可满足两相制供电的要求，能有效减小零序和负序电

The socket structure is provided with a zero phase trigger control unit, through the photoelectric sensing element of the unit, optical coupling can be performed to generate zero phase trigger, and the opening or the closing of a two-way thyratron in the zero phase can be accurately controlled, therefore, an electric device inserted on an output socket can be started or stopped from the zero phase, in order to reduce the electromagnetic interference and prolong the service life of the electric device, the use efficiency of the electric device can be enhanced, the power supply thereof can be saved, filtering and rectifying can be performed through a current switching unit when the alternating current power supply passes through a filtering and rectifying circuit, the noise caused by external interference and affect can be filtered, and the power supply can be respectively transmitted to a current detecting socket and the input end of the current switching unit to be detected through a temperature sensor arranged on the current switching unit.

本实用新型为有关一种插座结构，尤指为设有零相位触发控制单元，可通过其光电感测元件来进行光耦合而产生零相位的触发，且可准确控制双向闸流阀在零相位的开启或者关闭，进而达到插置于输出插座上的电器装置从零相位开始启动或者关闭，以降低电磁干扰而延长电器装置使用寿命，且可提升电器装置的使用效率及节省电源，并通过电流转换单元于交流电源通过滤波整流电路进行滤波整流，可滤除外部所干扰影响的杂讯，并分别传送至电流侦测插座及电流转换单元的输入端，而可通过电流转换单元所设置的温度感应器来进行侦测，于电路温度升高时，温度感应器可进行切断双向闸流阀的电源输出而达到保护输出插座上所插设的电器设备。

In order to give the gyroscope test terrace power supply, it demand designing the appropriation of the gyroscope of the different category triphase power supply to give the power supply to the different category gyroscope.

为了给陀螺测试平台供电，需要设计不同种类的陀螺的专用三相电源，以便给不同种类的陀螺供电。

According to switching power supply's theory, the circuit analysis, and transformer's foundation, it has analyzed switching power supply's principle of work from the electric circuit work's perspective, and factures a kind of switching power supply circuit diagram, which is quite simple, and is reliable for the operation, and is suitable for using commonly in the present life .

再根据开关电源的理论、电路分析、及变压器的基础，从电路工作的角度分析了开关电源的工作原理，制作了一种比较简单，工作可靠，且适用于目前生活中常用的开关电源。

As a fault occurred on a distribution line, the breaker and non-communication Protection in the faulted segment's ends will operate to clear the fault segment. The segments of lost power supply will again get power supply from back-up source by the control unit, so that its power supply will be restored.

配电线路发生故障后，故障区段两端的断路器在配电线路无通道保护的作用下动作跳闸，切除故障部分；失去电源的非故障区段在备用电源自动投入单元的控制下，投入备用电源，恢复相应区段的正常供电。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。