482 results about "Secondary loop" patented technology

The invention discloses a DC voltage divider parameter anomaly detection method based on harmonic characteristics, and the method comprises the steps: deploying an isolation type voltage sensor at a bus of a DC power transmission system, carrying out the voltage sampling through combining with an ADC, carrying out the data buffering and preprocessing, extracting a fundamental wave component and a target harmonic component through the fast Fourier transform, and calculating the harmonic distortion rate. And constructing a low-voltage arm capacitance and harmonic distortion rate model based on a voltage divider secondary circuit equivalent circuit and an energy distribution principle, and calibrating the low-voltage arm capacitance and harmonic distortion rate model. And designing a multi-objective optimization scheduling algorithm based on energy storage capacity and capacitance characteristics, and realizing dynamic power distribution and harmonic suppression of the system. And after abnormal triggering, the system automatically loads a capacitance compensation coefficient, adaptively adjusts algorithm parameters in combination with a measurement loop PI control link, reduces a harmonic amplification effect, and ensures that a measurement error is within an acceptable range. Harmonic monitoring precision and capacitance compensation optimization capability of the direct-current power transmission system are effectively improved, and stable operation of the system is guaranteed.

The invention relates to an electrical equipment fault monitoring and positioning method and system based on data analysis, and belongs to the technical field of electrical equipment monitoring. The method comprises the following steps: sensing a transient traveling wave signal of a fault current by adopting a traveling wave detection technology to determine an initial fault area; acquiring state data of the secondary equipment in the fault area through mapping of the secondary equipment in the fault area; constructing a secondary loop connection model based on the configuration file, and designing an action sequence rule base to verify the action logic and time sequence matching of a regional data centralized protection device, a circuit breaker and a communication link in real time; based on logic verification, action triggering conditions are extracted to be fused with the regional data set; and inputting the fault feature vector into a classification model for fault identification by obtaining the classification model. According to the invention, through traveling wave detection, EEMD decomposition, data synchronization and logic verification, feature information related to the fault is accurately extracted, and through data fusion and real-time learning, the fault identification precision and efficiency are improved.

The invention provides an electric energy metering error correction method and system based on data fusion. Belongs to the technical field of electric energy metering. The method comprises the following steps: collecting multi-dimensional data, and preprocessing the collected multi-dimensional data; performing feature extraction on the operation data by using a convolutional neural network, and mining spatial features in the data; a recurrent neural network is adopted to extract the time sequence characteristics of the secondary loop and environmental data, and time sequence association between the data is established; through convolution kernels (local, middle and global) of different sizes and a depth separable convolution technology, the calculation complexity is reduced, spatial feature multi-level extraction of equipment operation data and environment data is realized, and the comprehensiveness and efficiency of feature expression are improved.

The invention provides a substation secondary circuit label intelligent management system comprising a virtual and real circuit mapping module used for analyzing an SCD file and information logic diagram data and establishing an association relationship between a virtual circuit and a physical circuit; the intelligent label generation module is used for generating an intelligent label containing a dynamic two-dimensional code based on the physical connection model and the virtual loop model; the label analysis and display module scans the two-dimensional code through a mobile terminal to realize linkage visualization of virtual and real loop information; and the multi-source database module is used for storing a physical equipment hierarchical model, a virtual loop configuration table, an information logic path table and a label coding rule. According to the system, association matching of the secondary loop and the virtual loop is realized by analyzing the SCD file, rapid query and visual display of information are realized by means of the intelligent label, and association matching of the secondary loop and the virtual loop is realized by means of the port number, so that the virtual-real corresponding relation of the secondary loop and the virtual loop is realized. Through intelligent management and application of the labels, the accuracy and efficiency of operation and maintenance work are improved.

The invention discloses a low-voltage power distribution anti-misoperation device which comprises an anti-reverse power transmission module, an anti-misoperation module, a power regulation anti-misoperation auxiliary module, an interaction control screen and a state logic switching module. The invention discloses a low-voltage power distribution anti-misoperation method and device, and the method and device can effectively eliminate the above problems through an anti-reverse power transmission module, an anti-misoperation module and a power adjustment anti-misoperation auxiliary module, have the functions of preventing reverse power transmission and preventing power failure of a user caused by manual operation, and have a locking function when a line does not meet a loop closing condition. On the basis that an original secondary loop is provided with three locks and two keys, three heat reverse connection points are added, the device keeps the original three-lock and two-key protection function of a power supply company, and the intelligent heat reverse loop closing operation function is achieved. Therefore, the five-prevention function under the condition that the electric operation cannot be realized due to the defects of the device or the electrical secondary circuit can be met.

A cooling plate for cooling chip having redundant cooling fluid circulation. A primary fluid cooling loop removes heat directly from the chip. A secondary cooling loop acts as a condenser for two phase cells, thus removing heat from the chip indirectly. The cold plate may be fabricated as two parts: bottom plate and top plate where is the fluid is divided to primary stream to the bottom plate and secondary stream to top cooling plate. Two-phase, self-contained cells may be partly immersed in the primary cooling loop and partly immersed in the secondary loop. Fluid ports circulate cooling fluid by having one orifice coupled to the primary cooling loop and one orifice coupled to the secondary cooling loop.

The present disclosure belongs to the technical field of health status assessment of secondary circuits in power systems, and specifically relates to an image recognition method for a secondary circuit terminal based on contrastive learning and an improved CRNN. The method includes: step 1: pre-training sample data of a secondary circuit terminal block of a power system through the contrastive learning; step 2: improving a feature extraction layer of a CRNN by using a residual neural network; and step 3: introducing an ECA-Net on the basis of the step 2 to construct a recognition model for the secondary circuit terminal based on the contrastive learning and the improved CRNN. In the method of the present disclosure, an image of the secondary circuit terminal block can be accurately recognized, and the accuracy of image recognition, detection accuracy and detection efficiency can be greatly improved.

The invention discloses a measurement and control system of gas heating equipment, which relates to the technical field of equipment measurement and control, and is characterized in that a flow feed-forward control module is used for determining a target mass flow value through a feed-forward compensation processing mechanism according to at least one parameter measured by a sensor measurement module; the temperature control module is used for determining PID control parameters of a cascade PID control structure comprising a main loop and an auxiliary loop according to the temperature parameters measured by the sensor measurement module and a preset temperature difference grading fuzzy PID control rule; and the power control module is used for determining the target heating power according to the target heating rate and the characteristic parameters of the rear-end purging object, and adjusting the heating power of the heater in combination with an anti-integral saturation mechanism configured by the temperature control module and the power control module. By adopting the system, the heating process can be accurately adjusted and quickly responded, and the temperature control stability and the equipment operation efficiency are improved.

The invention relates to the technical field of nuclear reactor safety, and particularly discloses a reactor waste heat export, recovery and comprehensive utilization system and method based on a heat pipe, and the system comprises a nuclear energy generation system, a secondary loop energy conversion system, a primary loop waste heat discharge system, a secondary loop waste heat discharge system, and a waste heat recovery and comprehensive utilization system. According to the waste heat recycling system, the heat pipe can be used for heat transfer and storage under the peak regulation operation condition, the nuclear heat use efficiency is remarkably improved, the requirements of various types of energy sources such as electricity and heat are met, and passive export of reactor core waste heat can be achieved through multi-natural-circulation coupling cooperative operation under the condition of a whole-field outage accident. By means of the efficient heat transfer characteristic and the modularization characteristic of the heat pipes, independent operation of the heat pipes can be achieved, the problem of single-point failure of the system can be avoided, meanwhile, separation of a reactor coolant and a cooling medium of a waste heat removal system can be achieved, the inherent safety of a nuclear reactor is remarkably improved, and the requirements of multi-purpose scenes are met; and the purpose of fully utilizing resources is achieved.

Embodiments of the invention provide a high density liquid cooling system including a rack, primary loop piping including a primary inlet, a primary outlet, a primary loop filter, and a primary bypass valve, and secondary loop piping including a secondary inlet, a secondary outlet, a first pump, a first filter downstream of the first pump, and a secondary bypass valve. The system includes a heat exchanger having a first side and a second side. When the primary bypass valve is open, at least a portion of the fluid in the primary loop piping flows through the primary inlet and the primary outlet without traversing the heat exchanger, and when the secondary bypass valve is open, at least a portion of the fluid in the secondary loop piping flows through the secondary inlet and the secondary outlet without traversing the heat exchanger.

The invention discloses a 24-hour uninterrupted electric energy monitoring method for secondary circuit voltage drop, relates to the technical field of electric energy metering, and solves the problems that errors exist in electric energy metering and fault early warning and positioning are not timely. The method comprises the following steps: 1, carrying out on-site investigation on a monitoring position, and determining the position and the number of monitoring points; 2, carrying out 24-hour uninterrupted on-line real-time metering or detection on a detected point by arranging an abnormal mode self-identification module; 3, electric energy data of the electric power system is monitored in real time through a secondary circuit electric energy monitoring module, and the secondary circuit electric energy monitoring module comprises the steps that 4, voltage and current signals output by a monitoring point are collected through an LoRa / NB-IoT module, the monitored data information is transmitted to a monitoring center or a cloud platform in real time at a transmission interval less than or equal to 1 minute; according to the invention, the electric energy monitoring capability is greatly improved.

The invention belongs to the technical field of flow accelerated corrosion testing, and particularly discloses a high-temperature water vapor pipeline flow accelerated corrosion performance testing device and method, and the high-temperature water vapor pipeline flow accelerated corrosion performance testing device comprises a detachable testing section, a steam generator, a spraying system and a steam compressor. The steam compressor is connected with the outlet end of the test section and the steam generator and is used for pressurizing to form high-flow-rate steam flow. The spraying system is connected with the bottom of the steam generator, the nozzle is arranged on the pipeline, and liquid drops are introduced into steam flow to form gas-liquid two-phase flow. A DCPD measuring system is integrated in the test section, comprises a sample clamping assembly, an electrode penetrating assembly and a sensor assembly, and is used for clamping a sheet-shaped sample and measuring the corrosion performance. According to the invention, the actual service conditions of the secondary loop pipeline of the nuclear power plant in a high-temperature, high-pressure and gas-liquid two-phase impact environment can be accurately simulated, and meanwhile, the corrosion thinning rate of the material is monitored in real time by utilizing the DCPD measurement system integrated in the detachable test section, so that the hysteresis quality of a traditional offline measurement method is overcome, and the accuracy of experimental data is improved.

A thermal conditioning system including a heat-transfer circuit, a refrigerant circuit including successively: a compressor, a first bi-fluid exchanger and a second bi-fluid exchanger arranged jointly on the refrigerant circuit and on a main loop of the heat-transfer circuit, a first expansion valve, a third bi-fluid exchanger arranged jointly on the refrigerant circuit and on a secondary loop of the heat-transfer circuit, a first branch of the heat-transfer circuit being configured so that the heat-transfer liquid leaving the first bi-fluid exchanger returns to the first bi-fluid exchanger without passing through the second bi-fluid exchanger, and including a second heat exchanger configured to exchange with a second air flow. A second branch connects the first branch to the main loop, and includes a third heat exchanger configured to exchange with the second air flow.

The invention discloses a cascade control method and system for the alum adding process of a waterworks. The cascade control method comprises the steps that preprocessed operation data of the waterworks are obtained; according to the preprocessed operation data, on the basis of a pre-trained LSTM-Transformer prediction model, an alum adding amount prediction value, an effluent turbidity prediction value and a sedimentation velocity prediction value at the current moment are obtained; segmenting the alumen ustum image based on an SAM algorithm, extracting features by adopting OpenCV, and calculating a settling velocity; based on feed-forward-feedback compound control, the feed-forward control adjusts the alum adding amount in time by monitoring the change of the quality of raw water, a main loop of cascade control predicts the water turbidity through MPC to calculate the optimal set value of the settling velocity, an auxiliary loop calculates the alum adding amount through the settling velocity, the feed-forward control and cascade control are subjected to decentralized summation, and the alum adding amount is calculated according to the optimal set value of the settling velocity. And calculating the final addition amount of the alum. According to the invention, the dosage of alum can be regulated and controlled more accurately.

The present invention discloses a nanocrystalline current transformer with DC component resistance and a method for using the same, comprising: a current transformer having a magnetic core hole extending from front to back in the middle of the front side of the current transformer. The device is provided with a secondary-side disconnection detection and protection mechanism, which effectively prevents the internal magnetic field imbalance of the transformer caused by the disconnection of the secondary circuit, avoids the core magnetic flux saturation and the generation of potential high electromotive force, thereby protecting the transformer itself and peripheral equipment, and reducing the risk of power system failures such as fire or short circuit. At the same time, a live conductor centering fixing mechanism is provided to ensure the stable centering position of the conductor in the transformer core hole, optimize the magnetic field distribution, reduce magnetic leakage, significantly improve the accuracy and stability of current measurement, and reduce measurement fluctuations introduced by conductor shaking, providing more accurate data support for harmonic analysis, fault detection, and power quality monitoring of the power system.

The embodiment of the invention discloses a clock source and electronic equipment, and belongs to the technical field of integrated circuits. The clock source comprises a plurality of inverter chain loops, the plurality of inverter chain loops comprise a main loop and at least two auxiliary loops, and the main loop is respectively coupled with the at least two auxiliary loops to construct at least two coupling relations. According to the embodiment of the invention, the problem of oscillation mode ambiguity of a clock source design scheme capable of improving the oscillation frequency in the related technology is at least solved.

The invention discloses a zero-sequence current acquisition and analysis device and method for a power secondary circuit, and belongs to the field of power systems. The device comprises a current transformer, a temperature sensor, a front-end analog filter, an ADC, a rear-end digital filter, a self-adaptive wave trap, a processor and an alarm. Wherein the output end of the current transformer is connected to the processor through the front-end analog filter, the ADC and the rear-end digital filter in sequence; and the processor is also respectively connected with the temperature sensor and the alarm. According to the invention, real-time acquisition and early warning of the zero-sequence current are realized, and high precision and stability of an acquisition result in a full temperature range are ensured at the same time.

The invention relates to a secondary loop heat management control method and a vehicle. The secondary loop heat management control method and the vehicle are used for meeting different water inlet temperature requirements on the two sides as much as possible when a passenger compartment and a battery both have cooling requirements. The method comprises the steps that when it is recognized that a passenger compartment and a battery have refrigeration requirements at the same time, the target air outlet temperature of a cold air core, the battery cooling request temperature, the actual air outlet temperature of the cold air core and the actual temperature of a battery inlet are obtained; determining a compressor target rotating speed; according to the first temperature difference between the target air outlet temperature of the cold air core and the actual air outlet temperature of the cold air core, the opening change value of a first three-way valve is determined; determining an opening upper limit value of a first three-way valve and a target rotating speed of a first water pump according to a second temperature difference between the battery refrigeration request temperature and the actual water inlet temperature; the rotating speed of the compressor is controlled according to the target rotating speed of the compressor, the rotating speed of the first water pump is controlled according to the target rotating speed, the opening degree of the first three-way valve is adjusted according to the opening degree change value, and the adjusted opening degree is smaller than or equal to the opening degree upper limit value.

The invention discloses a transformer substation primary and secondary loop vector state comprehensive detection method and system, and relates to the technical field of transformer substation automation, and the method comprises the following components: S1, a vector state comprehensive detection method, S2, intelligent data fusion and analysis, S3, automatic verification and self-diagnosis, and S4, operation process simplification and modular design. According to the method, the current, voltage and frequency electrical signals in the loop are collected in real time and converted into the vector form for comprehensive analysis, the amplitude of the signals is considered, the phase parameters of the signals are deeply analyzed, and therefore whether the phase, polarity and wiring of the loop are correct or not can be more accurately judged, and in addition, the accuracy of the loop is improved. The system further integrates multi-source data such as data, historical data and standard model data collected by a sensor in real time, real-time fusion and analysis are conducted through an intelligent algorithm, and the accuracy and timeliness of a detection result are further improved through comparison and correlation analysis of the multiple data sources.

The invention discloses a method for determining the feed water flow of an evaporator of a nuclear power station and a related device, and relates to the technical field of thermoelectric conversion, and the method comprises the steps: obtaining the steam flow of an outlet of the evaporator, the secondary loop pressure of the evaporator, and the feed water temperature and nuclear power of an inlet of a main water supply pipe; the specific enthalpy coefficient is determined by looking up a table according to the secondary loop pressure of the evaporator and the feed water temperature, and the specific enthalpy coefficient is the ratio of the steam specific enthalpy to the feed water specific enthalpy; the nuclear power is converted into theoretical steam flow, the theoretical steam flow is used for verifying the steam flow of an evaporator outlet, and if verification passes, the steam flow of the evaporator outlet is used as one of the inputs of the feed water flow soft measurement model; and inputting the specific enthalpy coefficient, the steam flow at the outlet of the evaporator and the secondary loop pressure of the evaporator into a water flow soft measurement model to obtain the theoretical feed water flow. According to the method, high-precision dynamic measurement and calculation of the water supply flow of the evaporator are realized based on the water supply flow soft measurement model.

The invention discloses a switch cabinet partial discharge and temperature anomaly real-time monitoring method and system, and the method comprises the steps: S1, cooperating with a plurality of power enterprise nodes through a federated learning server, carrying out the combined training of a double-branch fault recognition model under the condition of protecting data privacy, and generating an initial strategy mapping library of related fault information and linkage strategies; s2, deploying the model in an edge computing device, performing cross-model fault identification on real-time monitoring data, and matching a corresponding linkage instruction from a strategy mapping library when the confidence coefficient meets a condition; s3, issuing the linkage instruction to the secondary loop equipment for execution, and collecting execution effect data as linkage feedback data; and S4, the linkage feedback data is processed and transmitted back for triggering iterative training of the fault identification model and strategy parameter updating of the strategy mapping library. According to the invention, closed-loop intelligent monitoring from fault identification and accurate linkage to strategy self-optimization is realized.

The invention discloses a nuclear power plant distributed control system and control method, and relates to the technical field of nuclear power plant digital control, and the method comprises the steps: a global optimization layer generates a cross-unit general control strategy library based on a transfer learning algorithm according to the decision period of the global optimization layer; when the coordination control layer operates by using the transferable control strategy corresponding to the unit equipment where each two-loop subsystem is located, the corresponding two-loop subsystem control weight is dynamically allocated based on the multi-agent attention network according to the decision period of the coordination control layer; when the execution control layer operates by using the dynamically distributed two-loop subsystem control weight, the first-loop temperature, the first-loop pressure and the coolant flow are obtained according to the decision period of the control layer, a safety constraint matrix is calculated through a safety manifold projection module, and a quadratic programming problem with a relaxation factor is solved; and the corrected control weight of the two-loop subsystem is obtained and converted into a control instruction to be issued to a DCS field control station.

The invention provides a grain multi-group decoupling prediction method, a modeling method, equipment and a storage medium. The modeling method comprises the following steps: providing a training database; extracting a feature library; training a secondary loop model, and outputting a first component prediction result; training a main loop model; and iteratively training the secondary loop model and the main loop model to obtain a grain multi-group decoupling prediction model. The method not only corrects a spectral reflection value, but also constructs a closed-loop prediction mechanism based on a first component state, dynamically screens wavebands, establishes an internal and external double-closed-loop cascade architecture of a main loop and an auxiliary loop, continuously adjusts parameters and updates a feature library, thereby realizing systematic suppression of interference signals and enhancement of intrinsic features of a second component. An interpretable feature screening mechanism is introduced, the importance of each wave band is evaluated in real time, the combination of a data-driven model and spectral physical prior is realized, and the problem that the generalization performance is reduced due to the fact that the model depends on shortcut features in the training process is avoided.

The invention discloses a transformer substation secondary circuit drawing intelligent processing method and system, belongs to the technical field of electric power system digitization, and aims to solve the problems that the missing detection and false detection rate of old fuzzy drawings is high, a deep learning model lacks topological semantic understanding, full-process automation is insufficient, and structural management is lacked in conventional secondary circuit drawing processing. According to the core scheme, the method comprises the steps of segmenting an image through a U-Net network to generate masks, generating a structured topology table in combination with a primitive database, converting the structured topology table into nodes and directed edges with electrical attributes, constructing a queriable graph database integrating version management, rule check and a layout optimization algorithm, and finally generating a standard format drawing. According to the scheme, the primitive recognition and topology analysis precision is improved, deep mapping from images to electrical logic is achieved, full-process automation is achieved, version tracing and rule verification are supported, and standardized drawings are produced.

The invention discloses a complete-cycle health maintenance method, system and device for secondary circuit equipment and a medium, and the method comprises the steps: obtaining the operation data of the secondary circuit equipment, and dividing the operation data into an initial data set and an incremental data set; constructing an initial health prediction model by using the initial data set, and predicting the residual service life of the secondary circuit equipment; according to an incremental learning algorithm, updating the initial health prediction model by using an incremental data set to obtain an updated health prediction model; and performing health state evaluation and residual service life prediction on the secondary circuit equipment by using the updated health prediction model, thereby realizing complete-cycle health maintenance of the secondary circuit equipment, automatically adjusting an incremental learning strategy according to the change of an equipment operation environment, and improving the adaptability of the system.

The invention belongs to the technical field of power distribution network digital design, and particularly relates to an automatic connection method for a secondary circuit of an intelligent substation digital model, which comprises the following steps of: S1, carding an equipment object coding rule and a drawing layout rule; s3, automatically generating a secondary loop model through a secondary loop automatic matching algorithm of keyword semantic analysis, and S4, verifying and correcting the model according to a confidence level algorithm to realize intelligent generation of a transformer substation digital model, and automatically constructing a machine account model by adopting a drawing identification technology through combing an object coding rule and a drawing layout rule so as to realize intelligent generation of the transformer substation digital model. A secondary loop model is automatically generated through a secondary loop automatic matching algorithm of keyword semantic analysis, the model is verified and corrected according to a confidence level algorithm, and finally intelligent generation of the transformer substation digital model is achieved.

The invention provides a secondary circuit visualization method and device of an intelligent substation and electronic equipment. The method comprises the steps that an SCD file of the intelligent substation is acquired, IED nodes are searched for according to the SCD file so as to extract IED information, and the IED information comprises information of all intelligent electronic devices in the intelligent substation and the connection relation between the different intelligent electronic devices; and analyzing the IED information, generating a virtual terminal publishing and subscribing address table, searching ExtRef nodes under each IED node according to the virtual terminal publishing and subscribing address table so as to obtain virtual terminal description information, constructing a secondary circuit connection diagram of the intelligent substation at least according to the virtual terminal description information, and visually displaying the secondary circuit connection diagram. The problem that the planning, extension, transformation, operation and maintenance difficulty of the intelligent substation is increased due to the fact that the secondary circuit structure of an existing intelligent substation becomes invisible is solved.

The invention provides a CT secondary circuit verification system and method, and the system comprises an alternating current source which is used for injecting a test current into a CT secondary circuit; the at least one current measuring device is used for measuring current values of different branches in the CT secondary circuit; and judging the wiring correctness of the CT secondary circuit by comparing the current values of the different branches. According to the invention, the efficiency of acceptance inspection and regular verification of the relay protection loop can be greatly improved, and a powerful guarantee is provided for safe and reliable operation of a power system.

The present invention relates to the technical field of electric vehicle thermal management, and particularly relates to a secondary loop thermal management system and an electric vehicle, which include a refrigerant loop, a passenger compartment water loop, a battery water loop, and a motor water loop. The refrigerant loop includes a water-cooled evaporator and a water-cooled condenser; the passenger compartment water loop includes a first four-way valve and a second four-way valve. The first interface of the first four-way valve is connected to the first end of the water-cooled evaporator, and its second interface is connected to the third end of the water-cooled condenser. The first interface of the second four-way valve is connected to the fourth end of the water-cooled condenser, and its second interface is connected to the second end of the water-cooled evaporator; the battery water loop is respectively connected to the fourth interface of the first four-way valve and the third interface of the second four-way valve; the motor water loop is respectively connected to the third interface of the first four-way valve and the fourth interface of the second four-way valve; the structure of the present invention is simply designed, with low cost, diverse thermal management modes, and the heat exchange efficiency is guaranteed.

The embodiment of the invention provides a secondary circuit electricity stealing and leakage detection method, device, equipment and system, an electricity test pen, a storage medium and a program product. The method comprises the following steps: acquiring change data generated by a feature analysis unit; wherein the change data represents the power utilization change condition of the target secondary circuit; the change data is obtained by processing feature data generated by the data preprocessing unit; the feature data is obtained by performing feature extraction on the power data acquired by the data acquisition unit; the electric power data comprises an electric power signal and electric meter information of the target secondary circuit; determining a judgment result of the target secondary circuit according to the change data; wherein the judgment result comprises the electric larceny and leakage condition of the target secondary circuit. The method can accurately and quickly complete the electricity stealing and leakage detection work of the secondary circuit.