101results about How to "Reasonable power distribution" patented technology

The invention discloses an optical storage DC power supply system based on a coordination control device. The optical storage DC power supply system comprises a field equipment layer, a network communication layer and a station control management layer. The field equipment layer comprises a distributed photovoltaic power generation unit, a lead-acid battery energy storage unit and a load unit, wherein the distributed photovoltaic power generation unit and the lead-acid battery energy storage unit are accessed to a DC bus by means of a DC / DC converter. The network communication layer is equipped with the coordination control device, which acquires operation data of a grid-connected current transformer, the DC / DC converter and the load unit, packages the acquired data and uploads the data to a host server of the station control management layer, and performs remote metering, remote control and remote regulation on parameters of equipment of the field equipment layer through issuing messages. The distributed photovoltaic power generation unit, the lead-acid battery energy storage unit and the grid-connected current transformer can operate according to instructions of the optical storage coordination control device. The optical storage DC power supply system can meet the requirement of guaranteeing stability of the DC bus under the operating conditions of power outage of an AC power supply, input fluctuation of photovoltaic power generation, load switching and the like.

An intelligent power distribution operation monitoring system based on an artificial neural network and a control method are provided. Preferably by using a new energy generation power and grid multi-load flexible access intelligent power distribution operation monitoring and control system, and integrating a photovoltaic, energy storage, mobile charging pile multi-load flexible plug-and-play technology by using intelligent power distribution monitoring management technology, a dynamic optimized intelligent distribution network is formed through the Internet technology, to achieve reasonable layout, save resources, improve efficiency, achieve peaking and regulating power consumption, reduce electricity cost, and provide the electricity consumption quality and the electricity consumption reliability, so that the coordinated control operation of multiple loads is achieved. In combination with the big data technology, a relationship between the line loss index of the substation area and the various indexes of the distribution transformer operation is quantified, thereby providing direct data support for the treatment, transformation and planning of the substrate area, and providing asolution for the power distribution and consumption industries.

The invention relates to a high-density phase change memory cell structure, a 3D circuit design layout and the manufacture process of phase change random access memory (PCRAM) chip. The invention can achieve a high-density memory array of the PCRAM chip by arranging a peripheral circuit based on CMOS (complementary metal oxide semiconductor) process below the memory array by the 3D layout design, wherein the peripheral circuit chip is planarized by CMP (chemical mechanical polishing) process. A P- or N-type silicon wafer is subjected to epitaxial technology to form an N / P (or P / N) junction, and the silicon wafer is bonded with a CMOS silicon wafer at low temperature by an alignment device. An integrated N / P (or P / N) junction on the CMOS wafer can be achieved by employing wafer stripping or back-thinning technology, a reversible phase change resistor is then prepared by the integral N / P (or P / N) junction and interconnected with the junction through copper, and the common package technology is adopted to achieve the entire chip, thus integrally achieving the three-dimensional 1R1D chip structure.

The invention discloses a satellite-ground joint beam forming and power distribution method based on a non-orthogonal multiple access technology (NOMA), and the method comprises the steps that a satellite communication sub-network serves a plurality of ground stations, a ground cellular sub-network serves a plurality of cellular users, and two sub-networks achieve the spectrum sharing; firstly, anNOMA technology is adopted in the ground cellular sub-network, and a multi-user clustering method is provided based on the correlation of channels among cellular users and the difference of channel gains; secondly, under the conditions that the user service quality is guaranteed and the transmitting power of a satellite and a base station is limited, the optimization problem of sum rate maximization of the whole system is established; and, the non-convex problem is converted into a convex optimization problem by adopting an S-Procedure and Taylor expansion method, and further the optimal beamforming weight vector and the power distribution factor of the satellite and the base station are obtained by utilizing an iterative penalty function method. According to the method, the beam formingtechnology and the non-orthogonal multiple access technology are combined, and a technical scheme is provided for improving the effectiveness of satellite-ground fusion network information transmission.

The invention provides an optimal distribution method and device for power of multiple battery packs in an energy storage power station. By determining the total number of the battery packs for charging and discharging switching in the energy storage power station, calculating the minimum variance of states of charges of the battery packs under each condition, comparing the minimum variance with state of charge variance limit values of the battery packs in the energy storage power station and selecting an eligible minimum number of times of switching of charging and discharging of the battery packs, the number of times of switching of charging and discharging of all the battery packs when the energy storage power station cooperates with new energy to perform fluctuation suppression, peak shaving and contribution to a tracking plan can be effectively reduced, and the service lives of the battery packs can be prolonged, so that the operation cost is reduced, and the economical property is improved; meanwhile, the SOC (state of charge) variation can be controlled within a certain range, thus avoiding weakening of the contribution capacity of the energy storage power station.

The invention belongs to the technical field of vehicles, particularly provides a vehicle power distribution method, device and system, a vehicle and a vehicle-mounted controller, and aims at solvingthe problems that in the prior art, power battery energy distribution is not reasonable enough, and the comfort requirements of a user cannot be met. In order to achieve the purposes, the vehicle power distribution method comprises the following steps: determining energy supply equipment according to the current operation condition of the vehicle; comparing the available output power of the energysupply equipment with the whole vehicle required power of the vehicle, and determining a state type of the vehicle under the current operation condition according to the comparison result; and distributing power to energy consumption parts of the vehicle according to the power distribution strategy corresponding to the state type. Based on the steps, the method provided by the invention has the beneficial effects that the power can be reasonably distributed to the maximum extent, the energy utilization rate is improved, and user experiences are improved.

The invention discloses a method for determining a data transmission path in a wireless sensor network and a device thereof. The data transmission path can be determined according to power distribution, thereby balancing energy consumption of cooperative nodes, and furthermore prolonging life cycle of a network. The method comprises the steps of: S1, determining a weighted power distribution value which corresponds with a source node that is contained in a WSN for data transmission; S2: determining a first transmission cost when data are transmitted from the source node to a sub-node according to the weighted power distribution value for a random sub-node except for the source node in the WSN; S3: in all sub-nodes, selecting the sub-node with least first transmission cost into a source node set; and S4: performing relaxing operation on the sub-node which is newly added into the source node set and total sub-nodes that are not added into the source node set, and using the sub-node which is newly added into a returning executing source node set as the source node and returning for executing the step S2 until objective nodes for data transmission are all added into the source node set.

The present invention relates to a coordinated control method for the wind power plant of a double-fed fan to participate in the one-time frequency modulation of a power system and belongs to the operation and control technical field of the power system. The method comprises the steps of establishing energy status evaluation indexes and power generation level evaluation indexes for fans; setting a communication coefficient matrix between fans; measuring the frequency of the coordination layer of the wind power plant and generating the reference value of the output power of the wind power plant; exchanging power generation level evaluation indexes between adjacent fans, conducting the Newton iteration through the outer loop iteration method, and tracking a reference value generated by the coordination layer; during each iteration step, calculating the approximate Newton direction of the step by each fan through the inner loop recursion method. In this way, the necessary information is provided for the outer loop iteration operation. According to the technical scheme of the invention, the stored kinetic energy of a double-fed fan can be fully utilized, and a coordinated control system is designed to reduce the computational burden of the coordination layer. Meanwhile, based on the second-order convergence of the distributed Newton method, the rapid primary frequency modulation of the overall wind power plant is realized. At the same time, the power can be reasonably distributed among fans, so that the safe operation of the fans is ensured.

The invention provides a power control method and communication equipment, and relates to the communication field. A problem of improper power distribution of CA (Carrier Aggregation) and DC (Dual Connectivity) technologies when NR (NEW RAT) adopting various subcarrier intervals is solved. The power control method is advantageous in that a terminal configured with a plurality of cells is provided,according to the subcarrier intervals, a plurality of cells are divided into cell groups, and power control modes among the cells are configured to be a first power control mode or a second power control mode by a base station, and a plurality of cells are one of the CA or the DC. The power control method and the communication equipment are used for power control during existence of carriers having various subcarrier intervals.

The invention discloses an electromechanical flywheel hybrid power system of an electric automobile. The electromechanical flywheel hybrid power system comprises a speed reduction device, a differential mechanism, an electric drive stepless speed change device, an electromechanical flywheel energy storage device, an electric drive stepless speed change device controller, an electromechanical flywheel energy storage device controller and a battery. The electric drive stepless speed change device dynamically couples a first motor, a power input shaft and a flywheel together, the control strategyis simple, power distribution is reasonable and effective, transmission is stable and efficient, the jerking feeling during mechanical braking is reduced, and the whole vehicle comfort can be effectively improved. Energy stored by the flywheel can directly output kinetic energy or be stored in the battery or directly drive an adjustable-speed motor, the rotating speed and torque of a gear ring and the flywheel are controlled through the electric drive stepless speed change device controller and the electromechanical flywheel energy storage device controller respectively, and adjustment of therotating speed and torque of the power input shaft is achieved to meet different driving requirements.

The invention discloses a cognitive radio network power distribution method with multichannel cooperative communication. A cognitive radio network is at least formed by two master user transmit-receive ends, two secondary user transmit-receive ends, one relay transmit-receive end and two channels based on an underlay spectrum sharing mode. Secondary users and master users can transmit respective data in the same channel at the same time, and the secondary users can transmit data with the cooperation of a relay device. Strict power control is required to be implemented when the secondary users transmit the data, so that the interference caused on the communication of the master users is ensured to be no more than interference limitation. The method aims to enable the two secondary users to reasonably distribute power on the two channels so as to maximize respective transmission capacity, and ensures that the interference on the two master users is lower than the limitation at the same time. A power distribution problem is modeled as a non-cooperative game, which is proved to meet the supermodel characteristic, so that balance exists. According to a favorable convergence property of a supermodel game, a best response updating algorithm is provided for reaching a break-even point, so that reasonable power distribution is realized.

The invention discloses a matching method of an EPS composite power supply of a heavy-duty commercial vehicle based on the power demand. The matching method comprises the steps that the rotating angleof a steering wheel, the vehicle speed and the time are collected through a test, data are processed, and thus the maximum time t<dmax> for completing single-time steering and the minimum interval time t<jmin> of two times of steering are obtained; the critical vehicle speed and the critical steering power P<seps> are solved through an analytic expression of steering resisting moment changed withthe vehicle speed; the ultimate steering power P<Mmax> needing to be output by a power-assisted steering motor is solved according to in-situ steering resisting moment; the t<dmax>, the t<jmin>, theP<seps> and the P<Mmax> are synthesized, the range of the capacitance of a supercapacitor set is calculated based on the discharge demand, and the capacitance of the supercapacitor set is determined based on the charging demand; and then the charging limited power and the discharge limited power of the supercapacitor set are calculated, the maximum electrical load of a vehicle electrical applianceand the critical steering power are combined to be matched with the output power of the vehicle power supply. The vehicle power supply and supercapacitors in the EPS composite power supply of the heavy-duty commercial vehicle are matched rapidly and advantageously, so that power distribution is more reasonable under the premise that the using requirements are met, and the energy utilization rateof the composite power supply is increased.

The invention discloses an excitation fluctuation precompressed multi-station compression moulding machine. Compression moulding units (1) are uniformly distributed and connected into a whole and are dragged by an intermittent mechanism (2) to carry out orderly transposition; a precompressed device (6) generates precompression under the compound effect of excitation and fluctuation; and a pressurizing device (7) converts the rotation of the power source into finalized compression moulding. Therefore, the compression moulding machine has the advantages that the machine overcomes the problems that the compression moulding is restricted by stroke and the compression moulding product has internal defects, the mechanical repeatability is uniform and reliable, the power distribution is reasonable and energy-saving, one machine has multifunction, multi-blocks can be generated by being pressed at one time and the compound compression moulding can be carried out.

The invention provides a device for measuring the gravity center of a waterborne carrier in a motion state. The device is characterized by being provided with four or more GNSS signal receiving devices, a posture sensor device and a CPU data recording and processing device, wherein the GNSS signal receiving devices are used for receiving a GNSS satellite signal in real time, and calculating the geographic coordinates of an observing point; two of the GNSS signal receiving devices are arranged in the heading direction of the waterborne carrier; the posture sensor device is used for acquiring the posture values of rolling, pitching and heaving of the waterborne carrier in real time; and the CPU data recording and processing device is connected with each GNSS signal receiving device and the posture sensor, and used for recording the observing value of each device in real time, and processing the observation values to obtain the coordinates of the gravity center of the waterborne carrier under a waterborne carrier coordinate system. Through adoption of the device and method for measuring the gravity center of the waterborne carrier, the gravity center position of the waterborne carriercan be obtained accurately in real time specific to the problems of irrationality and inaccuracy of an existing waterborne carrier gravity center determining method.

The invention relates to a driving device for a wool spinning machine. After a front roller motor decelerates, one path of front roller motor subjected to deceleration is connected with a front-right roller through the driving of a first belt; the other path of front roller motor subjected to deceleration is connected with a front-left roller through driving of a first intermediate gear pair and a second belt; after a rear-middle roller motor decelerates, one path of rear-middle roller motor subjected to deceleration is connected with an intermediate roller gearbox through driving of a third belt and a fourth belt; the other path of rear-middle roller motor subjected to deceleration is connected with the intermediate roller gearbox through driving of a second intermediate gear pair and a fifth belt; left and right intermediate rollers are connected with the intermediate roller gearbox; the third belt drives to be connected with a rear roller gearbox through the driving of a sixth belt; the second intermediate gear pair is connected with a rear roller gearbox through driving of a seventh belt; left and right rear rollers are connected with the rear roller gearbox; after a main motor decelerates, the main motor subjected to deceleration is connected with a spindle through a spindle belt via a main shaft and a rolling disk; and a lifting motor subjected to deceleration is connected with a ring rail through a worm gear and worm transmission pair, a stroke cam, a cam roller and a swing rod. The driving device disclosed by the invention has the advantages of simple structure, reduced amount of driving mechanisms and reduction of production cost.

The invention discloses an energy management system and method of a compound power supply electric automobile and the automobile. The energy management system comprises a signal collecting and processing device, an automobile road condition information collecting device, a vehicle controller and a compound power supply controller, wherein the signal collecting and processing device is used for collecting automobile state information of the electric automobile, the automobile road condition information collecting device is used for obtaining condition information of a to-be-run road which is away from the electric automobile for a preset distance; the vehicle controller is used for generating driving power according to the automobile state information and determining a target voltage of a super-capacitor bank according to the driving power, the to-be-run road condition information and the automobile speed of the automobile state information, and the compound power supply controller is used for distributing power of the super-capacitor bank and a power battery pack according to the driving power, the target voltage, a compound power supply signal of the automobile state information, a power threshold value of the power battery pack, a power threshold value of the super-capacitor bank and a power threshold value of a DC / DC converter. According to the energy management system and method of the compound power supply electric automobile and the automobile, power distribution of the super-capacitor bank and the power battery pack is more reasonable, the life of the power battery pack is prolonged, and the working efficiency is improved.

The invention discloses a hybrid vehicle energy management method, which comprises the steps of obtaining a plurality of initialization data sets used for representing boundary values of preset numerical value intervals of target parameters under a preset condition, and obtaining a fuzzy logic control model according to each initialization data set; inputting the actual total power of a target vehicle, the charge quantity of a storage battery, the efficiency of a fuel cell and the current of the fuel cell, which are contained in the target parameters, into the fuzzy logic control model to obtain the power of the fuel cell corresponding to each initialization data set; optimizing the fuzzy logic control model according to the fuel cell power corresponding to each initialization data set. Thus, the fuzzy logic control model is optimized, the reasonable distribution of the power between the fuel cell and the storage battery is realized, and the control effect of an energy management strategy is improved.

The invention discloses a cross-layer interference limited power distribution method for cognitive radio networks. The method studies the problem of power distribution in multi-user underlying spectrum shared cognitive radio networks based on FBMC-OQAM. The method comprises the following steps: in order to improve the energy efficiency of the entire network, introducing cross-layer interference restrictions to protect secondary users in the network from excessive interference; introducing the concept of virtual queues, and converting an extra packet delay caused by multi-user contention channels to a queuing delay in the virtual queues corresponding to the channels; proposing a nonlinear programming problem with nonlinear constraints by taking the system energy efficiency as an objective function and taking the delay and transmission power as constraint conditions; and converting the problem to a convex polynomial nonlinear programming problem through some transformations, and further calculating a global optimal solution by adopting a Lagrange dual method. Compared with some existing methods, the method (EEPA) has higher performance in improving the energy efficiency, ensures that the power distribution for each user is more reasonable, and has certain practical values.

A self-propelled double-disc fertilizer spreader relates to agricultural machinery and equipment, and solves the technical problems of non-adjustable spread range, uneven spread, poor reliability of agitator and unreasonable distribution of stirring and spreading power in existing fertilizer spreaders. The invention includes: an agricultural operation vehicle composed of a vehicle body, a transmission system and a hydraulic system, the vehicle body is provided with a vehicle frame, a hydraulic quick-change joint, and a hopper, a blanking adjustment system, a throwing system, a stirring system, a transmission system and The double throwing disc fertilizer spreading device composed of hydraulic motor. The present invention adopts the design of double buckets and double throwing discs, the separation technology of stirring and throwing transmission, the hydraulic motor as the power source and the setting of the blanking adjustment system. Therefore, the present invention is used for agricultural field management and has the advantages of large material throwing range, uniform throwing, The advantages of adjustable blanking amount and reasonable power distribution.

The invention discloses a track tractor twelve-gear transmission assembly. Power is respectively transferred to a rotary cultivation power output shaft part 104 and a walking power driving part 107 through a power input shaft part 101; the clutching and rotating speed adjustment of the rotary cultivation power output shaft part 104 is controlled through a rotary cultivation gear shifting part 102; a driving wheel controls a high-speed gear, a low-speed gear and a reverse gear through a walking high, low and reverse gear shifting part 103; four speed gears are controlled through a walking four-gear shifting part 105; and a walking steering part 106 respectively controls left-right output of the power to realize the steering function. The track tractor twelve-gear transmission assembly has the following advantages: (1) the track tractor twelve-gear transmission assembly can be connected with multiple machine tools on the market, has twelve gears, adopts low walking output, and can arrange various driving track patterns; (2) the rotary cultivation output and the walking are relatively independent; and (3) after the lower power output is applied to a medium-small track tractor, a small load wheel can be adopted.

The invention discloses a server hard disk power consumption dynamic balancing method and device, a terminal and a storage medium. The method includes obtaining a hard disk power consumption level list, and collecting hard disk power consumption values regularly; determining a power consumption interval of the collected hard disk power consumption value based on each power consumption limit value in the hard disk power consumption level list; and recording the power consumption limit value corresponding to the maximum endpoint value of the power consumption interval as a first target power consumption limit value, and determining the power consumption level corresponding to the first target power consumption limit value as a first adjustment target power consumption level of the hard disk. The power consumption values of the hard disks are collected regularly, and the power consumption level of each hard disk is reasonably adjusted according to the real-time power consumption values of the hard disks, so that the power consumption distribution of each hard disk is more reasonable, the power consumption utilization rate is effectively improved, unnecessary power consumption loss is avoided, and the power cost is reduced. From the perspective of the server, the total power consumption of the hard disk is quantized and controllable, normal operation of services is ensured, and the purpose of hard disk power consumption management is achieved.

The invention provides a transfer case integrated central axle for an 8 x 8 drive vehicle, which comprises two cylindrical gear planetary mechanisms and a middle-axle main reducing gear, A first planet carrier is fixed on the input shaft of the middle axle, A first sun gear is connected to the rear axle shaft, A drive cylindrical gear is integrally arranged with the first ring gear, A first differential lock is connected between the driving cylindrical gear and the rear axle shaft, A second ring gear is coaxially connected to the front axle shaft, The second sun gear is coaxially connected with the driving bevel gear shaft of the middle axle main reducer, and the driven cylindrical gear and the second planet carrier are integrally arranged, the second differential lock is connected betweenthe driven cylindrical gear and the driving bevel gear shaft of the middle axle main reducer, and the driven cylindrical gear is meshed with the driving cylindrical gear. The transfer case integratedcentral axle can reasonably distribute the torque and the rotational speed transmitted to the wheel sides of the first bridge, the second bridge and the middle bridge as well as the rear axle, and can simultaneously solve the problems that the traditional transfer case structure is inconvenient for the arrangement of the whole vehicle, and affects the weight of the whole vehicle and the off-roadperformance.

The invention discloses an ECMS hybrid electric vehicle energy management strategy based on grey wolf optimization, and belongs to the field of fuel cell hybrid electric vehicle energy management, and the strategy comprises the steps: building a whole vehicle dynamic model according to the parameters of a vehicle and the characteristics of an FCHEV; building a fuel cell hybrid power energy management model based on an ECMS strategy; and based on the target of improving the vehicle economy, aiming at the problem of equivalent factor optimization in an ECMS strategy, adopting a grey wolf optimization algorithm (GWO) to adjust an ECMS equivalent factor. By the adoption of the technical scheme, reasonable power distribution between fuel cells can be achieved, and on the premise that the power performance is met, the maximum economical efficiency and the stable driving performance are obtained.

The invention provides a method and a device for evaluating energy storage unit power distribution of an energy storage power station. The method comprises: calculating power-energy state SOE relevancy of a battery pack string, according to the power-SOE relevancy, evaluating power distribution conditions of an energy storage unit on each battery pack string in an operation process; according to the power-SOE relevancy, calculating a power-SOE relevancy standard deviation coefficient of the battery pack string, according to the standard deviation coefficient, evaluating dispersion degree of the power-SOE relevancy of the battery pack string at each time in an operation process of the energy storage unit; and according to the standard deviation coefficient, calculating a standard deviation coefficient aggregate value of the power-SOE relevancy of the battery pack string, and according to the aggregate value, evaluating variation trend of battery pack string power distribution by the energy storage unit with run time. The method and the device solve technical problem in the prior art that power distribution of a battery pack string cannot be effectively evaluated, and a technical effect of effectively evaluating power distribution of the battery pack is achieved.

The invention discloses an electronic track intelligent train driving system, which includes a drive system A, a drive System B, a drive shaft A, a drive shaft B, a number of steering shafts and rubber wheels at both ends of each shaft, the drive system A is composed of a motor A, a motor controller A, a high-voltage distribution box A and the energy storage system A connected in turn; a motor A drives a driving shaft A; a motor B, a motor controller B, a high-voltage distribution box B and an energy storage system B are connected in turn to form the drive system B. The motor B drives the driving shaft B, and the CAN network of the driving system A and the driving system B communicates with the whole vehicle controller. A symmetrical arrangement, redundancy design and centralize direct drive mode of permanent magnet synchronous motor are adopted in that invention. When one drive system can not work, a single drive system can be used to meet the requirement of most working conditions, and the invention is suitable for bi-directional train driving, and has the characteristic of reasonable axle load distribution of the vehicle, sufficient power, safety, reliability and good economy.

The invention discloses a power distribution method. The power distribution method comprises the steps of acquiring channel state information between a user terminal and a remote access unit; obtaining target power corresponding to the channel state information according to a preset mapping relationship between the channel state information and the power; and changing the transmitting power of theantenna corresponding to the user terminal into the target power. The invention further provides a remote access unit, a distributed antenna system and a medium. According to the invention, the powerdistribution of the remote access unit to the user terminal is reasonable.

The invention discloses a photoelectric complementary system of an oilfield pumping unit. The system comprises a photovoltaic power generation device, a photoelectric complementary control device, a power grid power supply, a motor device and a pumping unit. According to the photoelectric complementary system of the oilfield pumping unit provided by the invention, the power supply generated by the photovoltaic power generation device is sufficiently utilized; furthermore, the power supply is reasonably distributed; the rotation speed of a motor is accurate and convenient to adjust; the energy-saving effect is realized while the reliable operation of the pumping unit is ensured; and thus, the photoelectric complementary system has good practical application value.

The invention provides a power configuration method and device. The method comprises the steps that when UE sends data to first network side equipment from a first channel and sends data to second network side equipment from a second channel, it is determined that the first channel is overlapped with the second channel and a third channel, and a first part of a first sub-frame j where the first channel is located is overlapped with a second sub-frame i where the second channel is located; the second part, except the first part, of the first sub-frame j is overlapped with the first part, where the third channel is located, of the third sub-frame i + 1; wherein the third sub-frame i + 1 is the next sub-frame of the second sub-frame i; according to the priorities of the first channel and the second channel, allocating first transmitting power to the first sub-frame j and allocating second transmitting power to the second sub-frame i, wherein the first transmitting power is less than or equal to the first power upper limit value, the sum of the first transmitting power and the second transmitting power is less than or equal to the first threshold value, and the sum of the third transmitting power of the third subframe i + 1 and the first power upper limit value is less than or equal to the second threshold value.

The invention relates to a dynamic load harmonic wave monitoring method and device for a power distribution transformer. The device comprises a data acquisition module, a filtration module, an analog-digital conversion module, a communication module, a kernel processing module and a display module. The kernel algorithm of the device is a systematic and comprehensive harmonic wave additional loss computing method proposed in the mode that an inverted-L-shaped transformer equivalent circuit model reduced to a secondary side and related theories such as the skin effect theory, the circuit superposition theory and the electrical measurement technology are combined, and the effects of all times of harmonic waves are equivalent to the individual effects of a series of independent power supplies and are merged. The system can be used for monitoring the harmonic conditions of a load of the power distribution transformer on line so that operators on duty, maintainers and administrative staff can control the harmonic conditions of the load of the power distribution transformer and conduct different types of adjustment or early warning according to the corresponding harmonic conditions.

The invention relates to the field of crushing and screening equipment, and specifically discloses a crawler-type counterattack mobile crushing and screening station. The station comprises a frame with a crawler wheel set, a vibrating feeder, a feeding hopper, a material distributing hopper, a tailing belt, a main conveying belt, a counterattack crusher, a material returning screen, a finished product belt, a material returning belt, and a power system. The power system is more reasonable in power distribution and low in energy loss and use cost; the feeding hopper, the tailing belt, the material returning belt, and the finished product belt can be folded or contracted, so that the device can be greatly folded in the transportation process, and the convenience in the transportation process is improved; the tailing belt can be mounted on any side of the device in a switching manner, so that the device has higher flexibility and maneuverability; and the material distributing hopper can be switched on three screening paths to obtain various finished product materials, so that the functions are more comprehensive, the working efficiency is high, and the screening effect is good.