摘要：【中文】本发明公开了一种电动汽车磁谐振耦合动态无线充电系统，包括前级功率整流电路、初级桥式逆变电路、初级耦合电容、初级线圈、次级耦合电容、次级线圈、次级桥式整流电路和次级滤波电容，所述前级功率整流电路设置于供电装置与初级桥式逆变电路之间，所述初级桥式逆变电路的输出端与初级耦合电容串联连接至初级线圈，所述初级线圈和次级线圈相互耦合，所述次级线圈与次级耦合电容串联连接至次级桥式整流电路的输入端进行整流，所述次级桥式整流电路的输出端与次级滤波电容相连，所述次级滤波电容与电动汽车的蓄电池相连进行充电。本发明可以实现高效率、中距离、动态的无线充电。 【EN】The invention discloses a magnetic resonance coupling dynamic wireless charging system for an electric automobile, which comprises a preceding stage power rectifying circuit, a primary bridge type inverter circuit, a primary coupling capacitor, a primary coil, a secondary coupling capacitor, a secondary coil, a secondary bridge type rectifying circuit and a secondary filter capacitor, wherein the preceding stage power rectifying circuit is arranged between a power supply device and the primary bridge type inverter circuit, the output end of the primary bridge type inverter circuit and the primary coupling capacitor are connected in series to the primary coil, the primary coil and the secondary coil are mutually coupled, the secondary coil and the secondary coupling capacitor are connected in series to the input end of the secondary bridge type rectifying circuit for rectification, the output end of the secondary bridge type rectifying circuit is connected with the secondary filter capacitor, and the secondary filter capacitor is connected with a storage battery of the electric automobile for charging. The invention can realize high-efficiency, medium-distance and dynamic wireless charging.

摘要：【中文】本发明公开了一种中性点不接地配电网对地绝缘参数测量方法及系统，包括以下步骤：通过中性点不接地配电网一个零序电压互感器A开口三角侧注入一特定频率电流信号；在另一个零序电压互感器B开口三角侧空载零序电压互感器测量返回的该频率电压信号；由该电压信号和电流信号计算出中性点不接地配电网的对地绝缘参数，即对地电容和对地泄漏电导。本发明可实现对地绝缘参数的在线测量，测量时不需改变配电网一次侧接线，不影响配电网正常运行，且可消除电压互感器内阻抗及配电网消谐电阻的影响，具有测量安全、简便、经济和精度高的特点。 【EN】The invention discloses a method and a system for measuring ground insulation parameters of a neutral point ungrounded power distribution network, which comprise the following steps: injecting a specific frequency current signal through an opening triangular side of a zero sequence voltage transformer A of a neutral point ungrounded power distribution network; measuring the returned frequency voltage signal by a no-load zero-sequence voltage transformer at the opening triangular side of the other zero-sequence voltage transformer B; and calculating the ground insulation parameters of the distribution network with the neutral point not grounded, namely the ground capacitance and the ground leakage conductance by the voltage signal and the current signal. The invention can realize the on-line measurement of the ground insulation parameters, does not need to change the primary side wiring of the distribution network during the measurement, does not influence the normal operation of the distribution network, can eliminate the influence of the internal impedance of the voltage transformer and the harmonic elimination resistance of the distribution network, and has the characteristics of safe, simple, convenient, economic and high precision measurement.

摘要：【中文】本发明公开了一种基于接地变压器分接抽头接地的配电网单相接地故障选线方法及系统，该方法首先，在变压器绕组抽头处设置均匀调节绕组接入量的接地支路，当配电网发生单相接地故障时，闭合故障相处的接地支路的开关；其次，调节接地变压器中故障相绕组分接抽头到两个不同的接入档位，同时测量在不同接入档位下系统所有馈线零序电流，并计算接入档位变化前后系统各馈线零序电流的变化量，零序电流变化量最大的馈线即为故障馈线，完成故障选线。仅需通过调节接地变压器绕组抽头档位即可完成故障选线，且接地变压器为变电站已有，仅需增加相应抽头及接地支路，无需增加相应选线设备，大大减小了投资成本，具有很强的经济性。 【EN】The invention discloses a method and a system for selecting a single-phase earth fault line of a power distribution network based on the tapping earthing of an earthing transformer, wherein firstly, earthing branches for uniformly adjusting the winding access amount are arranged at the tapping of a transformer winding, and when the single-phase earth fault occurs in the power distribution network, the switch of the earthing branch at the fault phase is closed; and secondly, adjusting a tapping point of a fault phase winding in the grounding transformer to two different access gears, simultaneously measuring zero sequence currents of all feeder lines of the system under different access gears, and calculating the variation of the zero sequence currents of all the feeder lines of the system before and after the change of the access gears, wherein the feeder line with the largest variation of the zero sequence currents is the fault feeder line, and completing fault line selection. The fault line selection can be completed only by adjusting the tap gear of the winding of the grounding transformer, the grounding transformer is already in the transformer substation, only corresponding taps and grounding branches need to be added, corresponding line selection equipment does not need to be added, the investment cost is greatly reduced, and the high-voltage grounding transformer has high economical efficiency.

摘要：【中文】本发明公开了一种基于接地变压器分接抽头接地的配电网单相接地故障辨识方法及系统，该方法在接地变压器绕组抽头处设置接地支路开关，通过连续测量接地变压器中性点电压及中性点电压变化量，当中性点电压及中性点电压变化量超过设定值时，使线路首端的接地变压器抽头接地，并逐级调节抽头档位，最后通过线路零序电流是否为线性变化判断接地故障是否存在。与传统的测量中性点电压偏移大小及中性点电压变化量的方法相比，本发明可对配电网故障特征量进行主动调节，故障辨识准确率更高，不会受三相对地参数不对称、三相负荷不平衡及负荷波动的影响。 【EN】The invention discloses a method and a system for identifying a single-phase earth fault of a power distribution network based on earthing of a tapping tap of an earthing transformer. Compared with the traditional method for measuring the neutral point voltage deviation and the neutral point voltage variation, the method can be used for actively adjusting the power distribution network fault characteristic quantity, is higher in fault identification accuracy, and cannot be influenced by three-phase ground parameter asymmetry, three-phase load imbalance and load fluctuation.

摘要：【中文】本发明公开了一种采用星型电容器的中性点不接地配电网对地绝缘参数测量方法及系统，包括以下步骤：通过中性点不接地配电网星型电容器中性点注入一特定频率电流信号；在开口三角侧空载的零序电压互感器测量返回的该频率电压信号；由该电压信号和电流信号计算出中性点不接地配电网的对地绝缘参数，即对地电容和对地泄漏电导。本发明可实现对地绝缘参数的在线测量，测量时不需改变配电网一次侧接线，不影响配电网正常运行，且可消除电压互感器内阻抗及配电网消谐电阻的影响，具有测量安全、简便、经济和精度高的特点。 【EN】The invention discloses a method and a system for measuring ground insulation parameters of a neutral point ungrounded distribution network by using a star-shaped capacitor, which comprises the following steps: injecting a specific frequency current signal through a star-shaped capacitor neutral point of a neutral point ungrounded power distribution network; measuring the returned frequency voltage signal by the zero-sequence voltage transformer with no load at the side of the opening triangle; and calculating the ground insulation parameters of the distribution network with the neutral point not grounded, namely the ground capacitance and the ground leakage conductance by the voltage signal and the current signal. The invention can realize the on-line measurement of the ground insulation parameters, does not need to change the primary side wiring of the distribution network during the measurement, does not influence the normal operation of the distribution network, can eliminate the influence of the internal impedance of the voltage transformer and the harmonic elimination resistance of the distribution network, and has the characteristics of safe, simple, convenient, economic and high precision measurement.

摘要：【中文】本发明公开了一种基于零相转移的低压供电网漏电故障保护方法，应用于在低压供电网出现故障时保障安全：线路发生接地故障时，在零线与大地之间外加一个电源，或加入一个调压器或变压器，以利用其在零线与大地之间施加一个电压，将故障相电压钳制到安全电压以下，消除发生接地故障处的安全隐患，满足低压供电网长时间不停电安全运行要求。本发明利用电源或调压器或变压器将故障相电压直接降低到安全电压以下，既能快速处理线路故障处的安全问题，降低人身设备的安全风险，又能不影响线路供电，确保供电网各负载的正常运行，大大提高供电可靠性和安全性，同时设计与施工安装成本低，具有广阔的市场前景。 【EN】The invention discloses a zero-phase transfer-based low-voltage power supply network leakage fault protection method, which is applied to ensure safety when a low-voltage power supply network fails: when the line has ground fault, a power supply is additionally arranged between the zero line and the ground, or a voltage regulator or a transformer is added, so that a voltage is applied between the zero line and the ground by utilizing the voltage regulator or the transformer, the fault phase voltage is clamped below the safe voltage, the potential safety hazard of the ground fault position is eliminated, and the requirement of long-time uninterrupted safe operation of a low-voltage power supply network is met. The invention utilizes the power supply or the voltage regulator or the transformer to directly reduce the voltage of the fault phase to be below the safe voltage, can quickly process the safety problem of the fault position of the line, reduce the safety risk of personal equipment, can not influence the power supply of the line, ensures the normal operation of each load of the power supply network, greatly improves the reliability and the safety of the power supply, has low design and construction installation cost and has wide market prospect.

摘要：【中文】本发明公开了一种配电网带电作业安全防护方法及装置,所述方法包括以下步骤：步骤1、检测接地线上流过的电流值i(t)和接地线顶端对地电压值U(t)；步骤2、基于检测到的数据进行以下判断和操作：在接地线熔断前，通过控制非作业相的相间开关闭合，使配电网线路首端安装的三相断路器自然跳闸。本发明能提高带电作业的安全性，避免由于过电流使得接地线熔断后，作业相电压不再为零，给作业人员带来的伤害。 【EN】The invention discloses a safety protection method and a safety protection device for live working of a power distribution network, wherein the method comprises the following steps of: step 1, detecting a current value i (t) flowing on a grounding wire and a voltage value U (t) of the top end of the grounding wire to ground; step 2, based on the detected data, the following judgment and operation are carried out: before the ground wire is fused, the three-phase circuit breaker installed at the head end of the power distribution network line is naturally tripped by controlling the phase-to-phase switch of the non-operation phase to be closed. The invention can improve the safety of live working and avoid the damage to operators caused by that the working phase voltage is not zero after the grounding wire is fused due to overcurrent.

摘要：【中文】一种核壳结构的非线性复合绝缘材料及其制备方法，它属于电气绝缘材料制备技术领域。本发明称取1～15g的具有核壳结构的碳化硅粉末放入烧杯中，加入50～100ml丙酮，然后加入50～60g环氧树脂，超声分散5～10min，然后在50～60℃油浴环境下搅拌4～5h，得到混合液中加入40～45g固化剂和0.5～1g促进剂，真空条件下搅拌20～30min，然后将混合液注入模具，一定温度下固化后自然冷却，制得所述的材料。本发明在16kV/mm以下电场中体积电导率小于6.5×10^‑14S/m，非线性阈值场强为16kV/mm，具有核壳结构的碳化硅粉末的掺杂更有利于提高非线性复合绝缘材料的非线性阈值场强。 【EN】A nonlinear composite insulating material with a core-shell structure and a preparation method thereof belong to the technical field of electric insulating material preparation. Weighing 1-15 g of silicon carbide powder with a core-shell structure, putting the silicon carbide powder into a beaker, adding 50-100 ml of acetone, adding 50-60 g of epoxy resin, ultrasonically dispersing for 5-10 min, stirring for 4-5 h in an oil bath environment at 50-60 ℃, adding 40-45 g of curing agent and 0.5-1 g of accelerator into the obtained mixed solution, stirring for 20-30 min under a vacuum condition, injecting the mixed solution into a mold, curing at a certain temperature, and naturally cooling to obtain the material. The volume conductivity of the invention is less than 6.5 multiplied by 10 in the electric field below 16kV/mm^‑14S/m, nonlinear threshold field strengthThe voltage is 16kV/mm, and the doping of the silicon carbide powder with the core-shell structure is more favorable for improving the nonlinear threshold field strength of the nonlinear composite insulating material.

摘要：【中文】本发明提供了一种伸缩管组，包括固定支架以及管组；所述管组可滑动式设置在所述固定支架上；所述管组包括至少两段可伸缩式串联设置的单管，相邻单管之间通过连接件进行活动连接；所述管组包括位于平面A上的多个最高点以及位于平面B上的多个最低点，平面A和平面B相互平行。应用本发明的技术方案，效果是：结构精简，便于伸缩调节，满足混凝土浇筑的施工需求。本发明还提供一种混凝土布料机，包含上述伸缩管组。本发明还提供一种台车，包含上述混凝土布料机。 【EN】The invention provides a telescopic pipe group, which comprises a fixed bracket and a pipe group, wherein the fixed bracket is fixedly connected with the pipe group; the pipe group is arranged on the fixed bracket in a sliding way; the pipe group comprises at least two sections of single pipes which are telescopically connected in series, and the adjacent single pipes are movably connected through a connecting piece; the tube set includes a plurality of highest points lying on a plane a and a plurality of lowest points lying on a plane B, the plane a and the plane B being parallel to each other. By applying the technical scheme of the invention, the effects are as follows: the structure is simplified, the telescopic adjustment is convenient, and the construction requirement of concrete pouring is met. The invention also provides a concrete spreader, which comprises the telescopic pipe group. The invention also provides a trolley which comprises the concrete spreader.

摘要：【中文】本发明提供了一种混凝土浇筑用管路布料系统，包括出料管，所述出料管包括一段管路或至少两段串联设置的管路，所述管路包括第一段管以及至少两根并列设置的第二段管，所述第一段管与至少一根所述第二段管连通；后段所述管路的第一段管与前段所述管路的第二段管连通。应用本发明的技术方案，效果是：出料管结构精简；采用一分多的结构形式，能够实现单个或多个窗口同时布料的施工需求，提高施工效率；管路的段数可根据实际情况可调，满足不同距离输送物料的需求。本发明还公开一种混凝土布料机，包含上述混凝土浇筑用管路布料系统。本发明还公开一种台车，包含上述混凝土布料机。 【EN】The invention provides a pipeline material distribution system for concrete pouring, which comprises a material outlet pipe, wherein the material outlet pipe comprises a section of pipeline or at least two sections of pipelines which are arranged in series, the pipeline comprises a first section of pipe and at least two second sections of pipes which are arranged in parallel, and the first section of pipe is communicated with at least one second section of pipe; the first section of pipe of the pipeline at the rear section is communicated with the second section of pipe of the pipeline at the front section. By applying the technical scheme of the invention, the effects are as follows: the structure of the discharge pipe is simplified; by adopting a one-to-many structural form, the construction requirement of simultaneously distributing materials on a single window or a plurality of windows can be met, and the construction efficiency is improved; the number of the sections of the pipeline can be adjusted according to actual conditions, and the requirements for conveying materials at different distances are met. The invention also discloses a concrete distributing machine which comprises the pipeline distributing system for concrete pouring. The invention also discloses a trolley which comprises the concrete spreader.