277results about How to "Improve the level of safe operation" patented technology

The invention relates to a multi-sensor fusion method used in an urban long tunnel monitoring system which consists of a sensor system, a collection communication transmittance interface and database storing data; the invention is characterized in that the collection communication transmittance interface is completed by PLC; meanwhile, the collection communication transmittance interface collects analog quantity and digital quantity both of which is output by the sensor system, directly sends the analog quantity and digital quantity to the database of a supervisory computer to be implemented fusion procession; the database outputs signals to man-machine interaction interface and intelligent warning system monitoring communication environment; the intelligent warning system can send out warnings including fire warning, visibility warning, carbon monoxide density warning, traffic volume and vehicle speed warning and light intensity difference warning at tunnel entrance. The invention is characterized in that information collected by a plurality of sensors is fused and urban underground long tunnel can be monitored in real time; the self warning of health condition in the tunnel and the self warning of equipment failure can be achieved so that long time health operation of the tunnel can be guaranteed.

The invention relates to a device and a method for testing pressure of an intelligent substation, and belongs to the technical field of intelligent substations. The device comprises an upper computer, a CPU (central processing unit), an FPGA (field programmable gate array) and an Ethernet physical layer circuit connected in sequence. A testing environment meeting requirements of an IEC (international electro-technical commission) 6185O specification system is provided, normal sampling values (SV) and GOOSE data can be output, normal system running or grid fault can be simulated, background interference flow data in an SV format and background interference flow data in a GOOSE format can also be output, and further, messages such as IP(internet protocol), ARP(address resolution protocol), ICMP(internet control message protocol) and SNMP(simple network management protocol) can be output to form a general background flow. By filtering and analyzing the SV message or the GOOSE message or the MMS message with the specific APPID, potential safety hazards existing in different load-pressure backgrounds of the specific IED device in the network or network switching devices of the whole process level are found, and safety running level of the intelligent substation is increased.

The invention discloses a power equipment image processing method. The method comprises the steps that a power equipment image and a sample image are acquired and processed, wherein processing comprises image preprocessing and image processing, and image processing comprises feature parameter extraction; and feature parameters of the power equipment image and feature parameters of the sample image are compared, and the state of power equipment corresponding to the power equipment image is described according to the comparison result. By use of the method to process the power equipment image, the power equipment image is converted into state description of the power equipment corresponding to the power equipment image, therefore, information valuable to power equipment monitoring is effectively extracted through computing equipment, labor cost and the storage space demand are greatly lowered, and monitoring efficiency and accuracy are greatly improved.

The invention discloses an on-line monitoring system and system for transformer station lightning invasion wave, which are applicable to on-line monitoring of the transformer station lightening invasion wave. The on-line monitoring system comprises at least three data collection terminals, a data center station and a remote access terminal; the data collection terminal is installed on a wire inlet terminal of the transformer substation for monitoring the invasion wave and power frequency current; voltage data is uploaded to the data center station in a wireless transmission mode; the data center station autonomously finishes analysis and diagnosis on the lightening invasion wave, determines a lightening type and counts and records related diagnosis data like overvoltage magnitude, times, etc, of the invasion wave under various types of lightening, analyzes a causes of a transformer substation accident, evaluates the effect on an insulation safety state and service life of a device by the invasion wave and an influence law of surges caused by various types of lightening on a power transmission line on the transformer substation, and transmits a diagnosis result to a remote access terminal. The on-line monitoring system and method have very important meaning to making preventive measurements for transformer station switch device lightening invasion wave and improving accident checking efficiency.

The invention discloses a method for automatically checking the protection functions of a microcomputer main-transformer differential protection device. The method includes the steps of starting a checking mode, shutting external alternating current sampling, reading a protection control word and a protection control definite value, starting to test an item of a test, judging whether protection is input or not, shutting other protection functions, generating a test sequence according to the definite value, carrying out alternating current input assignment, judging whether the protection acts or not, recording action values and action evaluation, releasing protection function shutting, judging whether the test is completed or not, generating a function checking report, printing the function checking report, exiting from the checking mode, starting external alternating current sampling and the like. By means of the method, extra hardware cost and extra outside loop wiring are not needed, testing of the various protection functions of the whole device can be completed without manual intervention and protection for a tester, the testing process and the testing result are dynamically displayed in real time, and the test report is automatically generated. Due to the automatic checking technology, device test items are standardized, and technical errors, such as test item missing, testing method mistaking and testing result misjudgment, caused by the capacity of workers are avoided.

The invention discloses a turbo generator set vibration fault diagnosis method based on forward reasoning. After a diagnosed turbo generator set starts, a parameter detection device is employed to carry out real-time detection on related work parameters in a start and operation process of the diagnosed turbo generator set and synchronously sends the detection information to a vibration fault diagnosis device for automatic vibration fault diagnosis, vibration faults of the diagnosed turbo generator set are diagnosed level by level by the vibration fault diagnosis device according to the detection result transmitted by the parameter detection device in combination with the active power value of the diagnosed turbo generator set, and the fault diagnosis process comprises steps of 1, shaft vibration swinging value diagnosis; 2, start process vibration fault diagnosis; 3, zero load operation vibration fault diagnosis; and 4, loaded operation vibration fault diagnosis. The method is advantaged in that the steps are simple, and the method is reasonable in design, is convenient to realize, has good use effects, can conveniently and rapidly accomplish the online steam turbine vibration fault diagnosis process and can further realize accurate and reliable diagnosis results.

The invention relates to a fiber bragg grating temperature sensor based GIS (Geographic Information System) equipment contact terminal temperature online monitoring system. The fiber bragg grating temperature sensor based GIS equipment contact terminal temperature monitoring system comprises a fiber bragg grating temperature sensor, a fiber bragg grating interrogator and a computer. The high accuracy fiber bragg grating temperature sensor respectively measures the GIS outer casing temperature, the contact terminal temperature and the environmental temperature; the interrogator receives and demodulates wave length signals reflected by the temperature sensor; the computer which is used for displaying temperature signals obtained by the interrogator can monitor the temperature change in real time. The fiber bragg grating temperature sensor based GIS equipment contact terminal temperature monitoring system has the advantages of being high in accuracy due to the facts that an appropriate algorithm is adopted and the contact terminal temperature is indirectly obtained through the outer casing temperature and the environmental temperature; enabling the GIS equipment to be reliably operated due to the fact that the fiber bragg grating temperature sensing technology is applied to the GIS equipment contact terminal temperature online monitoring; being strong in disturbance resisting capability and good in insulating performance, allowing fixed-point measurement, achieving real-time online measurement of the temperature and having wide application prospects.

The invention discloses a real-time monitoring method and system for the safe operation state of power grid equipment. The method comprises the following steps: training an equipment evaluation modelbased on historical equipment operation data; calculating relative evaluation between the devices based on the device operation data and the device evaluation model; and pushing an evaluation result of the relative safe operation state of the equipment. According to the invention, a real-time evaluation system of the power grid equipment is formed by constructing multi-stage evaluation indexes, sothat the defect of low timeliness of operation and maintenance state evaluation is overcome; on the basis of historical experience of power grid monitoring personnel, the SVM algorithm is adopted andthe real-time evaluation model is constructed, so that the labor amount of the monitoring personnel for manually judging risk equipment is reduced, the reliability of an evaluation result is improved, and the safe operation level of a power grid is improved.

The present invention discloses a photovoltaic power plant AVC control method, and the control errors of a calculation inverter and a reactive compensation device are calculated. The control error compensation and state estimation technology are introduced in a voltage reactive adjustment process, and the reactive control is carried out through the mode of gradually reducing the steady-state error between the outputs of photovoltaic power plant reactive power sources and a control target. After a reactive target is received, combined with a current reactive actual value, reactive power sources in a field are coordinated, and the reactive target issued by a main station is rapidly followed to carry out reactive control. According to the method, the reactive power balance of the inverter and the reactive compensation device can be reasonably allocated, under the premise of ensuring the safe and stable operation of photovoltaic power plant equipment, the dynamic continuous adjustment is realized to control grid-connected point voltage, and the requirement of the grid voltage is satisfied.

The invention discloses a cable bushing circular current monitoring system which comprises an A phase grounding cable circular current data collector (1), a B phase grounding cable circular current data collector (2), a C phase grounding cable circular current data collector (3), a junction box (4), a collection unit (5), a 220V power supply (6), a principal computer (7), a data converter (8) and a data transmission unit (9) and is characterized in that the A phase grounding cable circular current data collector (1), the B phase grounding cable circular current data collector (2) and the C phase grounding cable circular current data collector (3) are in signal connection with the principal computer (7) through the junction box (4), the collection unit (5), the data transmission unit (9) and the data converter (8). With the cable bushing circular current monitoring system, the insulating condition of the cable bushing can be monitored in real time, failure alarm is timely sent out, and the safe running level of the cable is improved.

The invention relates to a monitoring system, in particular to an electric power field work safe and automatic monitoring system. Compared with the prior art, the invention has the advantages that: monitoring and safety alarm can be carried out on field workers positioned in electric power field for work by a global positioning system safely and automatically, thereby achieving the purposes of prompting and alarming people who break the rules timely, guarantying personal safety of field workers, and having high processing efficiency. Meanwhile, the technical scheme of the invention also strengthens the public safety awareness of workers, improves safety control level of electric power field work, reduces staff liability accidents, enhances safe operation level of power grids, and creates huge social benefits from another aspect, therefore, the safe and automatic monitoring system positioned by a satellite has great importance and practical value, and provides powerful technical guarantee for power generation.

The invention discloses an online real-time monitoring method for the primary frequency modulation capability of a new energy station. The method comprises the steps that: the dynamic data of the newenergy station are collected; test signal exchange is carried out among a power grid dispatching main station system, a new energy field station and a new energy field station primary frequency modulation control system; the power grid dispatching main station system remotely tests the new energy field station, evaluates the primary frequency modulation capability of the new energy field station in real time and monitors primary frequency modulation characteristic parameters; and the power grid dispatching master station system remotely calls and processes the primary frequency modulation action file of the new energy field station, and quantitatively evaluates the primary frequency modulation performance indexes of the new energy field station in different time periods. The primary frequency modulation performance indexes of the new energy field station can be quantitatively assessed, the primary frequency modulation characteristic function parameter setting of the new energy field station is remotely monitored from the power grid dispatching master station system, conditions are created for a power grid dispatching institution to strengthen supervision and management of the primary frequency modulation of a new energy generator set, and the safe operation level of a power grid can be effectively improved.

The invention discloses an electric motor coach gate control external circuit with the two-side gate opening and closing control function. The electric motor coach gate control external circuit comprises a driver controller, a gate control circuit, a gate controller, an end switching gate control circuit, a zero-speed signal unit and a coach gate safety loop wire. The driver controller is connected with the gate control circuit through a key switch in series, the gate control circuit is connected with the gate controller and provides opening and closing signals for the gate controller, the end switching gate control circuit is connected with the gate controller and provides input signals for switches of coach gates on the two sides, the gate controller is interlocked with the zero-speed signal unit, the coach gate safety loop wire is interlocked with a traction circuit, and the end switching gate control circuit can have the manual end switching function. The electric motor coach gate control external circuit has the advantages that the gate control circuit is interlocked with a key of the driver controller, so that the safe operating level is increased; the gate controller is interlocked with the zero-speed signal unit, and the coach gate safety loop wire is built, so that personal safety of passengers can be guaranteed, the coach gates on the two sides of a coach can be simultaneously opened, manual end switching of the coach is achieved, and flexibility and variety of end switching of the coach and operating efficiency of the coach are improved.

The invention relates to the power transmission and transformation technology field, more particularly to an on-line monitoring system of a high-altitude and high-voltage power transmission line. The on-line monitoring system comprises: (1), an OPGW optical cable that is especially used by electric power and a broadband wireless MESH network based on an 802.11WLAN standard are employed for combination to construct a broadband transmission link; (2), an optical cable communication link based on a power transmission line OPGW is constructed; and (3), a wireless communication link is constructed. According to the on-line monitoring system of a high-altitude and high-voltage power transmission line in the invention, problems that a traditional line inspection mode wastes time and energy as well as plateau meteorology causes certain inconvenience for daily line maintenance and processing on emergent situations can be solved; therefore, a high definition on-site video of a random tower on a high-voltage power transmission line and data like local weather information can be returned to a headquarter in real-time, so that problems of a severe environment and difficult line patrol and the like can be effectively solved; moreover, the system has an active significance for further improving a safe operation level of a power grid.

The invention discloses a 1090MHz ADS-B (Automatic Dependent Surveillance-Broadcast) downlink data chain analysis and verification system based on a CPCI (Compact Peripheral Component Interconnect) structure. The system includes an antenna feed unit, an ADS-B receiver, and a data analysis and verification unit. The antenna feed unit is connected with the ADS-B receiver. The ADS-B receiver is connected with the data analysis and verification unit. The antenna feed unit is used for receiving an ADS-B radio signal. The ADS-B receiver is used for decoding the ADS-B radio signal and sending the ADS-B radio signal to the data analysis and verification unit. The ADS-B receiver adopts a CPCI structure. The system can monitor richer ADS-B information by making use of 1090MHz ADS-B downlink data. Moreover, troubleshooting is facilitated, the safe operation level of the ADS-B ground station equipment and the air traffic control system can be improved, and reference is provided for airline companies in ADS-B airborne equipment function verification. Based on the CPCI structure, the system has higher computing power, and is easy to expand.

The invention relates to a method for evaluating reactive power adequacy based on the heuristic energy function. Aiming at the defect that evaluation of reactive power adequacy in the prior art is not global and is low in precision, the invention discloses a method for evaluating reactive power adequacy of a power system based on the heuristic energy function, which is used for evaluating reactive power adequacy limit of the power system in the system global angle of view in a highly precise and rapidly fast manner. The technical scheme of the invention is as follows: the method comprises the following steps: a. introducing critical voltage of each node in an optimized multiplier measuring system; b. establishing a heuristic energy function model of the system and computing the critical energy of each node in the system; c. computing the global critical energy of the system; and d. obtaining the reactive power adequacy limit of the load nodes according to the critical energy of each load node. The method is mainly used for evaluating the reactive power adequacy of the power system and provides basis for reactive power compensation of the system.

An automatic generation method of an electric work ticket security measure description statement includes the following steps: 1. work equipment is selected; 2. five types of electrical-connection linking lists including a straight line, a broken line, an arc line, an electrical-connection point and an equipment primitive are automatically generated; 3. an automatic analysis of the electrical-connection relationship is carried out for obtaining an operational equipment list; 4. according to the equipment type selection and a consistent equipment rule thereof, a description phrase is generated; 5. whether the generated description phrase has a ambiguous meaning is analyzed and then determined; if so, semantic ambiguity processing is then carried out; 6. based on the generated description phrase, a rule optimization is carried out for generating a description sentence; and 7. an additional description statement is generated and then merged with the generated description sentence for forming a work ticket security measure description statement. The invention can effectively avoid the defects of the manual writing mode of the work ticket security technology measure such as low efficiency, possible security measure omissions and the like, ensures the security of the operation process, improves the running safety of a power grid, and effectively avoids human casualties.

The invention relates to a test device for a non-linear resistor type resonance eliminator. The test device is characterized by comprising an electronic voltage regulator, a booster transformer and a measurement circuit which are sequentially connected, wherein the measurement circuit comprises two test terminals connected with two ends of a resonance eliminator to be tested; a main controller is further provided and respectively connected with the electronic voltage regulator and the booster transformer through a measurement and control unit; and the measurement circuit is connected with the measurement and control unit and the main controller respectively through a signal isolation and conversion module. The invention has the benefits that the test device capable of detecting related parameters of the non-linear resistor type resonance eliminator is provided by adopting the high-voltage sampling signal isolation and conversion technology, and the test device can be used for detecting whether the non-linear resistor type resonance eliminator works normally or not. By adopting the test device, most direct and effective data is provided for state maintenance of the non-linear resonance eliminator, and the safe operation level of equipment is improved accordingly.

The invention relates to a power transmission tower angle steel connection joint. The power transmission tower angle steel connection joint comprises two principal materials, diagonal materials, diaphragm materials and auxiliary materials, wherein the principal materials are arranged in the vertical direction and serve as tower pillars, the diagonal materials are connected between the two adjacent principal materials, the included angle of the diagonal materials and the horizontal direction is smaller than 90 degrees, the diaphragm materials are horizontally arranged between the principal materials, and the auxiliary materials are connected with the principal materials, the diaphragm materials and/or the diagonal materials. The power transmission tower angle steel connection joint is characterized in that the principal materials which serve as the tower pillars comprise two or more principal material sections which are connected with one another in a head-to-tail mode; the tower pillars are composed of the principal material sections, the principal material sections comprise cross-shaped connecting plates which are perpendicular to each other and angle steel arranged on the crosswise intersected included angle portions. According to the power transmission tower angle steel connection joint, under the situation that the thicknesses of filler plates are different, connecting can be conducted among the principal material components according to the filler plate thicknesses obtained through actual calculation, the tower weight is reduced, it is guaranteed that the connection of the components is safe and reliable, and the economical efficiency of the tower is achieved.