The invention discloses an intelligent substation protection device synchronization performance test system and method based on a GPS (globe positioning system) accurate time synchronization technology The system comprises a plurality of subunits, each subunit comprises a relay protection test unit and a corresponding clock extension unit, the clock extension unit in each subunit is connected with a GPS receiving device, and the relay protection test units are guaranteed to start sending data at the same moment The method is mainly used for synchronization performance test of intelligent substation protection devices under the circumstance of conventional transformer sampling, includes two modes that a protection device samples directly from a secondary winding and samples via a merging unit, and is applicable to main substation protection for high-medium-low voltage side sampling, bus protection for cross-interval sampling, differential protection of a line with an intelligent substation on one side and a traditional substation on the other side, differential protection of a line with intelligent substation on both sides and the like

Intelligent substation protection device synchronization performance test system and method based on GPS (globe positioning system) accurate time synchronization technology

The invention relates to an electronic type mutual inductor as well as a system and a method for a verifying merging unit. The invention comprises a verifying system for the electronic type mutual inductor and the verifying system for the merging unit, and an overall verifying method of the electronic type mutual inductor and the merging unit is changed into a mode of respectively verifying the electronic type mutual inductor and the merging unit, so that the positioning of a verifying result is precise, and a powerful reference can be provided for the analysis of an error link and device interchange; and the operation of the verifying method is simple, and operating personnel can finish verifying works through simple training. The verifying system not only can be used for verifying a traditional mutual inductor, but also can be used for verifying an electronic mutual inductor; analog quantity output can be verified, and digital quantity output can also be verified; and the electronic type mutual inductor and the merging unit can be respectively and separately verified, and the combination of the electronic type mutual inductor and the merging unit can also be verified, so that the invention has the advantage of simple operation.

Electronic type mutual inductor as well as system and method for verifying merging unit

The invention provides a detecting and evaluating system of a data acquisition unit. The detecting and evaluating system of the data acquisition unit comprises a physical condition detector of the data acquisition unit, the data acquisition unit, an optical branching device, a simulation merging unit and an electronic transformer state analysis and evaluation platform, wherein the physical condition detector of the data acquisition unit is in communication with the data acquisition unit and the optical branching device, and the data acquisition unit, the optical branching device, the simulation merging unit and the electronic transformer state analysis and evaluation platform are connected in sequence. The detecting and evaluating system of the data acquisition unit is capable of detecting and evaluating the electronic transformer data acquisition unit from all aspects and all angles under the conditions of electromagnetic interference, high-low temperature, temperature change, vibration, and the like.

Detecting and evaluating system of data acquisition unit

The invention provides an electronic current transformer short-time current vibration test device and a method of the electronic current transformer short-time current vibration test device. The test device comprises a large-current generator, a hollow coil, an I/V converter, an ECT to be tested and a test host. The test host continuously records and stores data of a merging unit for more than 10s, at least simultaneously records more than three channels output by the same merging unit, and supports IEC61850-9-1 and IEC61850-9-2LE standards, wherein the channels for storing data can be selected. According to the electronic current transformer short-time current vibration test device and the method of the electronic current transformer short-time current vibration test device, a vibration test can be conducted on primary components of the ECT during the short-time current period, the structure is simple, data can be accurately measured, and the requirement of GB/T20840.8-2007 can be well met.

Electronic current transformer short-time current vibration test device and method thereof

The invention provides an electrified analysis system for electronic transformers, which is composed of multiple electronic transformers, merging units, a fault wave recording and network recording analysis device and an upper computer, wherein the electronic transformers are connected with the merging units respectively; the merging units are connected with the fault wave recording and network recording analysis device; the fault wave recording and network recording analysis device is connected with the post-end upper computer; the electronic transformers acquire data, the data are transmitted to the fault wave recording and network recording analysis device through the merging units, the fault wave recording and network recording analysis device stores a large-capacity storage hard disk,the acquired data are subjected to data format conversion through programmed software, and the data are subjected to offline analysis processing through a wavelet analysis algorithm based on Labviewanalysis software and a neural network based on depth learning. Detection on at least two electronic transformers in aspects of precision, harmonic detection performance and bandwidth performance stability and long-time electrified contrast examination can be realized.

Electrified analysis system for electronic transformers

The utility model relates to an electronic mutual indicator test system, which comprises an upflow device, an electronic mutual indicator and a test unit, wherein the electronic mutual indicator comprises a sensing head and a collector, the sensing head is connected in series with an output loop of the upflow device, the sensing head outputs current sensing signals to the collector, and the collector outputs data signals to the test unit and inputs synchronous signals synchronous with the clock of the test unit. In one implementation mode, the electronic mutual indicator test system also comprises a merging unit arranged between the collector and the test unit, the collector outputs data signals to the merging unit and inputs synchronous signals output by the merging unit, the merging unit outputs data signals to the test unit and inputs synchronous signals synchronous with the clock of the test unit, and the sensing head, the collector and the merging unit form a complete collection system. The electronic mutual indicator test system uses the test unit for testing the performance and the functions of the whole collection system of the electronic mutual indicator and the merging unit in the positive direction, i.e. interconnecting intercommunication test in the normal work state and the reverse direction, i.e. simulation of various typical faults or abnormal excitation.

Electronic mutual indicator test system

The invention provides a self-adaptive small current grounding line selection method which comprises the following steps: (1) a line grounding fault occurrence condition is defined; (2) a line grounding possibility formula is defined; (3) when a situation where the line grounding fault occurrence condition defined in the step (1) is met is monitored, a pre-positioned system collects required line fault information calculated by the line grounding possibility formula, and stores the line fault information in a transformer substation monitoring system database in accordance with a formula operator sequence; (4) the operator in the transformer substation monitoring system database is read, and according to the line grounding possibility formula definition, the grounding possibility is calculated; (5) lines which are subjected to the grounding fault are sorted according to a diminishing possibility sequence; and (6) according to the sorting result, a line trial tripping is carried out to judge a grounding fault line. The grounding line selection method of the invention can automatically adapt to protection and control devices of different communication protocols and different types, select the fault line is a convenient and rapid manner, and use the trial tripping to assist the fault handling.

Self-adaptive small current grounding line selection method

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Electronic mutual indicator test system

Self-adaptive small current grounding line selection method