# US 11,307,226 B2 · Method for monitoring electrical energy in traction power networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,226 B2 - Document ID: US11307226B2 - Status: Granted - Kind: B2 - Application number: 16/706,816 - Filed: 2019-12-08 - Published: 2020-12-31 - Granted: 2022-04-19 - Earliest claimed: 2019-06-25 - Assignees: Nanjing Institute of Railway Technology - Applicants: Nanjing Institute of Railway Technology - Inventors: Qihou Song; Honggao Feng; Baichuan Xu - Web page: https://patentgrep.com/patent/US11307226B2 ## CPC - B60L 3/12: Recording operating variables {; Monitoring of operating variables} - G01R 19/175: Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero - B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed - G01R 19/2513: {Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging} - G01R 21/133: by using digital technique - G01R 31/28: Testing of electronic circuits, e.g. by signal tracer ({EMC, EMP or similar testing of electronic circuits G01R31/002;} testing for short-circuits, discontinuities, leakage or incorrect line connection G01R31/50; checking computers {or computer components} G06F11/00; checking static stores for correct operation G11C29/00 {; testing receivers or transmitters of transmission systems H04B17/00}) - B60L 2200/26: Rail vehicles - B60L 2240/427: Voltage - B60L 2240/429: Current - B60L 2240/527: Voltage - B60L 2240/529: Current - Y02T 10/72: Electric energy management in electromobility - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present invention provides a method for monitoring electrical power in high-speed rail traction power supply networks/systems, comprising: collecting voltage and current analog signals from a traction power supply system, and converting the voltage and current analog signals into voltage and current digital signals; obtaining, by a processing unit, digital signals and transfer commands; compressing, by the processing unit, the digital signals according to the transfer commands to digital signal frames; and constructing a data link between the processing unit and a storage unit and transmitting the compressed digital signal frame to the storage unit. The processing unit may use run-length coding algorithm to compress the digital signal to be stored to obtain several compressed digital signal frames. Under different conditions of data link, transmission of compressed digital signal frames is adjustable to improve the reliability of digital signal transmission. ## Claims ### Claim 1 A method for monitoring electrical power in a high-speed rail traction power supply system, comprising: collecting voltage and current analog signals from the traction power supply system, and converting the voltage and current analog signals into voltage and current digital signals; obtaining, by a processing unit, the digital signals and a transfer command; compressing, by the processing unit, the digital signals to digital signal frames according to the transfer command; and constructing a data link between the processing unit and a storage unit and transmitting the compressed digital signal frame to the storage unit, wherein constructing a data link between the processing unit and a storage unit and transmitting the compressed digital signal frame to the storage unit comprises transmitting, by the processing unit, compressed digital signal frames with small weighting factors to the storage unit if transmission speed of the data link is low; and transmitting, by the processing unit, compressed digital signal frames with large weighting factors to the storage unit if transmission speed of the data link is high. ### Claim 2 (depends on 1) The method of claim 1, wherein the compression of the digital signals comprises using, by the processing unit, a run-length encoding algorithm to compress the digital signals to a plurality of digital signal frames. ### Claim 3 (depends on 2) The method of claim 2, wherein the construction of the data link between the processing unit and the storage unit comprises: transmitting, by the processing unit, a set decoding information corresponding to a set encoding information to the storage unit; and decoding, by the storage unit, compressed digital signal frames received from the processing unit with the set decoding information. ### Claim 4 (depends on 1) The method of claim 1, wherein the transmission of the compressed digital signal frames to the storage unit comprises: monitoring, by the processing unit, whether the data link between the processing unit and the storage unit is interrupted; registering or marking, by the processing unit, compressed digital signal frames that have not been transmitted or have been unsuccessfully transmitted as “un-transmitted” when the data link is interrupted; and transmitting, by the processing unit, compressed digital signal frames being registered or marked as “un-transmitted” to the storage unit when the data link between the processing unit and the storage unit is restored. ### Claim 5 (depends on 4) The method of claim 4, wherein the method is implemented by an apparatus for monitoring electrical power in the high-speed rail traction power supply system. ### Claim 6 (depends on 5) The method of claim 5, wherein the apparatus for monitoring electrical power comprises a collection unit, a communication unit, a conversion unit, and a processing unit; wherein: the collection unit is connected to the conversion unit; the conversion unit is connected to the processing unit through the communication unit; the collection unit is for collecting voltage and current analog signals and transmitting the voltage and current analog signals to the conversion unit; the conversion unit is for converting the voltage and current analog signals into voltage and current digital signals; the communication unit is for data communication between the conversion unit and the processing unit; and the processing unit is for calculation, storage, output, and recording of query data. ### Claim 7 (depends on 6) The method of claim 6, wherein the collection unit includes a power supply module, a collection module, a pre-processing module, and a summation module; wherein: the power supply module is connected to the collection module and the pre-processing module; the collection module is configured to establish a connection with the summation module through the pre-processing module; and the summation module is connected to the conversion unit. ### Claim 8 (depends on 7) The method of claim 7, wherein the pre-processing module comprises a signal conversion circuit, a filter circuit and a phase-lock circuit. ### Claim 9 (depends on 8) The method of claim 8, wherein the apparatus for monitoring electrical power further comprises a touch unit, a power supply module, and a storage unit; wherein: the power supply module is connected with and supply power to the collection unit, the communication unit, the conversion unit, the processing unit, the touch unit and the storage unit, respectively; the touch unit is connected to the collection unit and the processing unit, respectively; and the processing unit is connected to the storage unit. ### Claim 10 (depends on 9) The method of claim 9, wherein the collection unit, the communication unit, the conversion unit, the processing unit, the power supply module and the storage unit 700 are positioned in a casing body of the apparatus for monitoring electrical power; and the touch unit is embedded on a front panel of the casing body. ### Claim 11 (depends on 10) The method of claim 10, wherein the processing unit is embedded in a support base positioned in the casing body. ### Claim 12 (depends on 11) The method of claim 11, wherein: the support base is provided with a receptacle and a covering sheet; the processing unit further comprises a housing being embedded in the receptacle; and the covering sheet is configured to cover gaps formed between the housing and the receptacle. ### Claim 13 (depends on 12) The method of claim 12, wherein the receptacle has inner walls being symmetrically provided with at least two positioning ports and each of the positioning ports is provided with a locking member. ### Claim 14 (depends on 13) The method of claim 13, wherein the locking member comprises a positioning plate, a strain block, and an elastic body; wherein: the elastic body comprises two ends being respectively connected to a first inner wall of the positioning port and the positioning plate; and the strain block comprises two ends being connected respectively to a second inner wall of the positioning port 1-5 and the positioning plate.