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CN-121995107-A - Regenerative energy measuring device and method based on elevator brake resistor loop current detection

CN121995107ACN 121995107 ACN121995107 ACN 121995107ACN-121995107-A

Abstract

The invention discloses a regenerative energy measuring device and a method based on elevator brake resistor loop current detection, the device is clamped on an elevator brake resistor loop wire through a clip type current sensor, the braking current is sampled and the event is identified, the current is integrated during the braking event to obtain the accumulated charge quantity Q, and the instantaneous power is calculated by combining the braking voltage parameter when required and integrated to obtain the accumulated electric energy E. The brake voltage parameter can be a fixed value input by a preset/user, or a real-time voltage Ub obtained by high-resistance voltage division and isolation sampling across the brake resistor. The device supports setting a statistics time window, automatically seals up statistics results due to expiration, displays and inquires the statistics results, and adopts a battery power supply and low power consumption strategy to realize long-period on-site deployment. According to the scheme, an elevator control system or a direct current bus is not required to be connected, renewable energy statistical data which can be retested and reconciled can be rapidly obtained, and the scheme is used for standing, type selection and acceptance assessment of energy storage and energy saving transformation.

Inventors

  • MOU JIANPING

Assignees

  • 杭州育昇科技有限公司

Dates

Publication Date
20260508
Application Date
20260115

Claims (10)

  1. 1. The utility model provides a regenerative energy measuring device is detected based on elevator braking resistance return circuit electric current for elevator regenerative braking energy aassessment, its characterized in that includes: the clamping type current detection module is used for clamping the elevator brake resistor loop wire to obtain a brake current signal; the metering processing module is used for sampling and filtering the braking current signal and identifying a braking event based on a current threshold value and a duration criterion; The integral calculation module is used for integrating the braking current during the braking event to obtain an accumulated charge quantity Q, calculating the instantaneous power by combining the voltage parameter when the energy output is selected, and integrating to obtain an accumulated electric energy E; The statistics time window and sealing module is used for accumulating the Q or E in a preset statistics time window and sealing and storing the accumulated quantity and corresponding time information when the time window is finished; the device comprises a statistics time window, an output unit, an operation state, a man-machine interaction and display module, a battery power supply and low power consumption module and a storage module, wherein the man-machine interaction and display module is used for setting and displaying the statistics time window, the output unit and the operation state and inquiring the storage record, and the device further comprises a battery power supply and low power consumption module and is used for supporting long-period portable operation.
  2. 2. The elevator brake resistor loop current detection-based regenerated energy calculation device according to claim 1, wherein the voltage parameter is a fixed voltage Uset preset or input by a user, and the instantaneous power is calculated as P (t) =uset·ib (t).
  3. 3. The elevator brake resistor loop current detection based regenerative energy measurement device of claim 1, further comprising a voltage acquisition module that acquires a brake voltage Ub (t) across a brake resistor and performs isolated sampling, the instantaneous power being calculated as P (t) =ub (t) ·ib (t).
  4. 4. The elevator brake resistor loop current detection-based regenerated energy measurement apparatus according to claim 1, wherein the output unit is selectable between Ah and Wh, and a seal record is stored and displayed in accordance with the selected unit.
  5. 5. The regenerative energy measurement device based on elevator brake resistor loop current detection according to claim 1, wherein the statistical time window is a configurable duration range, preferably 0.5-30 days.
  6. 6. The elevator brake resistor loop current detection-based regenerated energy measurement apparatus according to claim 1, wherein the save-and-store includes at least one of a cumulative amount, a start-and-stop time or duration of a statistical time window, used voltage pattern information, and check information for checking.
  7. 7. The elevator brake resistor loop current detection based regenerated energy calculation device of claim 1, wherein the metering processing module allows the integration calculation module to perform integration only during the identification of a braking event and exit the integration state after the braking event is completed to reduce false metering.
  8. 8. The elevator brake resistor loop current detection regenerative energy measurement device of claim 1, wherein the low power module includes at least one of deep sleep and RTC timed wake-up, brake event triggered sampling frequency switching, and display energy conservation control.
  9. 9. A method for measuring and calculating the regenerated energy of an elevator by using the device according to any one of claims 1-8, which is characterized by comprising the steps of sampling and converting a braking current, identifying a braking event based on a threshold value and a duration criterion, integrating the current according to a sampling period during the braking event to obtain an accumulated charge quantity Q (Ah), acquiring a voltage parameter when Wh is selected for output, calculating instantaneous power and integrating to obtain an accumulated electric energy E (Wh), and storing the accumulated quantity and corresponding time information when a preset statistical time window is finished and outputting and displaying.
  10. 10. The method of claim 9, wherein the step of sealing includes writing the data of the statistical time window to a non-volatile memory and setting the data to a read-only display for acceptance checking after sealing.

Description

Regenerative energy measuring device and method based on elevator brake resistor loop current detection Technical Field The invention relates to the technical field of elevator energy conservation assessment and electric energy metering, in particular to a regenerative energy measuring device and method based on elevator brake resistor loop current detection. Background In the running process of the elevator, when the elevator is in working conditions such as descending, decelerating or idle ascending, the elevator can enter a regenerative braking state, and regenerative energy generated in the process is conventionally processed in such a way that a braking resistor is conducted through a braking unit, so that part of energy is consumed in a heat energy form, and energy waste is caused. In the energy-saving reconstruction project of the energy-storage type elevator, project related parties such as owners, energy-saving service companies and equipment suppliers are urgent to define core problems, namely, the specific numerical value of the upper limit of recoverable regenerated energy of a target elevator under the real running working condition, and the data are key bases of project standing feasibility analysis, energy-storage equipment type selection matching and project acceptance electricity-saving quantity accounting. The existing measurement and calculation modes for the elevator regenerated energy mainly comprise the following three types: The theoretical estimation mode is to calculate the regenerated energy through the derivation of a mechanical formula and an operation logic based on design parameters such as rated load, operation stroke, start-stop frequency and the like of the elevator. The method has the defects that the actual working condition factors such as dynamic load change, operation efficiency fluctuation and the like in the actual operation of the elevator are not considered, the deviation between the measuring and calculating result and the actual recoverable energy is large, and the reference value is limited. The frequency converter communication access mode is that the internal communication interface of the elevator frequency converter is accessed to read the relevant data of the regenerated energy recorded in the operation process of the frequency converter. The problem of this mode lies in that the suitability is extremely poor, and the converter communication protocol of different brands, different models is not unified, and the relevant data interface of most producer is not opened, needs professional technical personnel to carry out communication debugging simultaneously, relies on producer technical support, and commonality and convenience are not enough. The direct current bus is additionally provided with a measuring device, namely measuring equipment is connected in series or in parallel at the direct current bus side of the elevator, and bus current and voltage are directly detected to calculate regenerated energy. The mode needs to change the original electric loop of the elevator, is complex in construction, and can cause interference to the stability of an elevator control system in the construction and operation process, potential safety hazards exist, and meanwhile, the construction period is long, so that the normal use of the elevator is influenced. In summary, the existing measuring and calculating mode generally has the problems of poor suitability, complex construction, dependence on a manufacturer interface, interference on elevator operation or unreliable measuring and calculating results and the like, and is particularly difficult to obtain the real renewable energy statistical data with retest and reconciliation under the core constraint that an elevator control system is not changed, a direct current bus is not connected, and normal operation of an elevator is not affected. Therefore, special portable measuring and calculating equipment is needed, the method can be directly applied to an elevator brake resistor loop, the relevant parameters of the regenerated energy can be accurately counted within a set time range, and a reliable electricity-saving potential evaluation basis is provided for energy-saving projects. Disclosure of Invention The invention aims to provide a device and a method for detecting regenerated energy based on elevator brake resistor loop current, and aims to solve the difficulty that the prior art can acquire the regenerated energy statistical data on an elevator site in a non-invasive, retest and reconciliation way. The invention is realized by a regenerative energy measuring device based on elevator brake resistor loop current detection, comprising: the clamping type current detection module is used for clamping the elevator brake resistor loop wire to obtain a brake current signal; the metering processing module is used for sampling and filtering the braking current signal and identifying a braking event based on a current thresh