CN-122026531-A - Intelligent power distribution and energy consumption management system of negative pressure cabin equipment

CN122026531ACN 122026531 ACN122026531 ACN 122026531ACN-122026531-A

Abstract

The invention relates to the technical field of intelligent power distribution and micro-grid control, in particular to an intelligent power distribution and energy consumption management system of negative pressure cabin equipment, which comprises a state acquisition module, a control module and a control module, wherein the state acquisition module is used for acquiring real-time differential air pressure signals between the inside and the outside reference environments of each container type negative pressure purification module; the invention discloses a method for realizing microsecond level cross-cabin support of transient peak power, which comprises a container type negative pressure purification module, an equivalent mapping module, a voltage regulation module, an energy self-adaptive allocation module and a transient load state module, wherein the container type negative pressure purification module is used for mapping state information of internal equipment of the container type negative pressure purification module into virtual impedance parameters on a direct current shared bus, the voltage regulation module is used for remolding equivalent node voltage of a position where a gas-electric coupling node box is connected to the direct current shared bus in real time, and the energy self-adaptive allocation module is used for forming node voltage difference on the direct current shared bus according to the equivalent node voltage so as to provide peak power for a corresponding module in the transient load state.

Inventors

LUO WUXING
WANG LEI
SUN TINGTING

Assignees

西安四腾环境科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (8)

1. The intelligent power distribution and energy consumption management system of the negative pressure cabin equipment is characterized by comprising a rectifying and voltage stabilizing cabinet arranged at an access end of a main power grid, a direct current shared bus penetrating through a plurality of container type negative pressure purification modules and a gas-electricity coupling node box arranged in each module, wherein an air filter, a negative pressure fan and a heat energy conversion load unit are arranged in each container type negative pressure purification module, the gas-electricity coupling node box comprises a bidirectional direct current-direct current converter, a super capacitor and a microcontroller, and the gas-electricity coupling node box further comprises: The state acquisition module is used for acquiring real-time differential air pressure signals between the inside of each container type negative pressure purification module and the external reference environment; The equivalent mapping module is used for establishing a gas-electricity isomorphic equivalent circuit model based on the real-time differential air pressure signals, and mapping the state information of the internal equipment of the container type negative pressure purification module into virtual impedance parameters on the direct current shared bus according to a preset air pressure-impedance mapping relation; The voltage regulation and control module is used for real-time remolding the equivalent node voltage of the position where the gas-electricity coupling node box is connected to the direct current shared bus by changing the duty ratio of a power switch tube in the bidirectional direct current-direct current converter through the microcontroller based on the received real-time differential air pressure signal and combining the virtual impedance parameter; And the energy self-adaptive allocation module is used for forming a node voltage difference on the direct current shared bus according to the equivalent node voltage, and physically driving residual electric energy in the super capacitor in each gas-electric coupling node box to collect across modules according to the node voltage difference so as to provide peak power for the corresponding module in a transient load state.
2. The intelligent power distribution and energy consumption management system of negative pressure cabin equipment according to claim 1, wherein the method for establishing the gas-electricity isomorphic equivalent circuit model comprises the following steps: the method comprises the steps of obtaining a preset standard negative pressure reference value and a preset total input power limit value of a main power grid access end, mapping the standard negative pressure reference value to a reference bus voltage of the bidirectional direct current-direct current converter, obtaining real-time dust holding quantity parameters of the air filters in each container type negative pressure purification module, and mapping the real-time dust holding quantity parameters positively to static basic compensation currents of the gas-electric coupling node boxes; and generating an initial circuit structure state of the gas-electricity isomorphic equivalent circuit model according to the reference bus voltage and the static basic compensation current.
3. The intelligent power distribution and energy consumption management system of negative pressure cabin equipment according to claim 2, wherein the method for real-time remodelling the equivalent node voltage of the gas-electric coupling node box at the position of accessing the direct current shared bus by changing the duty ratio of a power switch tube in the bidirectional direct current-direct current converter comprises: Comparing the deviation real number with a preset tolerance deviation threshold value, and if the deviation real number is in a section lower than the tolerance deviation threshold value, controlling the microcontroller to maintain the current duty ratio of the power switch tube and keep the current equivalent node voltage unchanged; if the deviation real number is at a critical point equal to the tolerance deviation threshold value, extracting a historical duty ratio sequence stored in a system memory for compensation fine adjustment, and locking critical equivalent node voltage; If the deviation real number is in a section higher than the tolerance deviation threshold value, judging that an airflow transient voltage-losing event occurs, reducing the virtual impedance parameter corresponding to the container type negative pressure purifying module with the airflow transient voltage-losing event according to a preset sagging control logic, and synchronously expanding the duty ratio of the power switch tube to generate a target equivalent node voltage with low potential drop characteristic to replace the current equivalent node voltage.
4. The intelligent power distribution and energy consumption management system of negative pressure cabin equipment according to claim 3, wherein the method for physically driving the residual electric energy in each of the gas-electric coupling node boxes to perform cross-module collection according to the node voltage difference comprises the following steps: Under the constraint of a preset total input power limit value of the main power grid access end, when the air flow transient voltage loss event occurs and the target equivalent node voltage is generated, a low potential gap is generated in a target access stage of the direct current shared bus; Activating the super capacitor in the adjacent container type negative pressure purifying module without bias fault to form a distributed energy storage pool; According to node potential difference distribution of a circuit hardware layer, electric energy in the distributed energy storage pool is automatically reversely converged into the container type negative pressure purification module with the airflow transient voltage loss event along the lowest-impedance physical path in the direct current shared bus, and the duration time during which the ambient pressure is restored to the standard negative pressure reference value is controlled within a preset pressure restoration duration threshold.
5. The intelligent power distribution and energy consumption management system of the negative pressure cabin equipment according to claim 4, wherein the system further comprises an energy consumption closed loop recovery module, and the method executed by the energy consumption closed loop recovery module after the transient high load intervention is completed comprises the steps of continuously monitoring the recovery slope of the real-time differential air pressure signal, analyzing an air pressure field recovery process, and generating an air pressure field balance judging instruction according to the air pressure field recovery process; Responding to an air pressure field balance judging instruction, lifting the virtual impedance parameter corresponding to the container type negative pressure purifying module with the air flow transient voltage loss event, cutting off the cross-module current transmission link for collecting the residual electric energy; extracting a thermal energy conversion load unit with the last power supply priority order from the thermal energy conversion load units in a non-working state according to a preset system load power supply sequence table to serve as a receiving object; And transmitting the reverse feedback electric energy to the heat energy conversion load unit serving as a receiving object in a guiding way, and completely converting the redundant kinetic energy into heat energy for local persistence so as to achieve a complete internal energy loop in the micro-grid system.
6. The intelligent power distribution and energy consumption management system of a negative pressure tank plant of claim 5, further comprising a health self-diagnostic module, the method of health self-diagnosis comprising: when the system universe is in a voltage-stabilizing closed state, real bus maintenance current data on the direct current shared bus branch are read in real time; Performing reverse estimation based on the node admittance matrix corresponding to the extraction of the gas-electricity isomorphic equivalent circuit model to obtain a standard maintenance current predicted value; Solving and obtaining the global current drift rate of the system in operation by utilizing the comparison difference between the real bus maintenance current data and the standard maintenance current predicted value; and quantitatively evaluating the effective degradation degree of the air filter in the container type negative pressure purification module according to the aging index of the global current drift rate extraction module.
7. The intelligent power distribution and energy consumption management system of a negative pressure tank installation according to claim 6, wherein the method of quantitatively evaluating the degree of degradation comprises: recording the historical global current drift rate variable according to a preset sampling time period, and synthesizing the global current drift rate variable into a drift rate evolution sequence; Performing linear slope extraction processing of a sliding analysis window on each sub-segment in the drift rate evolution sequence to obtain a current drift trend value of a corresponding time segment; sequentially comparing all the extracted current drift trend values with a preset life state critical threshold stored in a system; If the current drift trend value is smaller than the preset life state critical threshold, judging that the health degree reaches the standard and recording a daily log; if the current drift trend value is equal to the preset life state critical threshold value, a monitoring warning code is generated; if the current drift trend value is larger than the preset life state critical threshold value, locating the hardware identification of the out-of-standard node, compiling maintenance work order data containing position information and failure mechanism analysis results, and outputting the maintenance work order data to an operation and maintenance terminal.
8. The intelligent power distribution and energy consumption management system of a negative pressure tank installation according to claim 1, wherein the method for obtaining real-time differential air pressure signals between the inside and outside reference environments of each of said container-type negative pressure purification modules comprises: Invoking a hardware sensor node to record high-frequency original environment omnidirectional pressure data, and smoothing the high-frequency original environment omnidirectional pressure data by utilizing a band-pass filter assembly to obtain a base pressure component; integrating ventilation wind speed setting parameters in the relevant area, and calling an adaptive background turbulence interference spectral line from a reserved nonlinear hydrodynamic frequency domain fingerprint library; Forming a self-adaptive cancellation frequency control parameter against the background turbulence interference spectrum line, and resetting a passband structure of the bandpass filter assembly; And executing counteraction calculation operation comprising deconvolution operator, separating and stripping environment coupling noise reverberation in the base pressure component, and obtaining the real-time differential air pressure signal after filtering the coupling noise.

Description

Intelligent power distribution and energy consumption management system of negative pressure cabin equipment Technical Field The invention relates to the technical field of intelligent power distribution and micro-grid control, in particular to an intelligent power distribution and energy consumption management system of negative pressure cabin equipment. Background The intelligent power distribution and energy consumption management of the negative pressure cabin equipment is characterized in that under the limited input condition of a main power grid, the power supply requirements and the internal energy storage of a plurality of negative pressure purification modules are comprehensively distributed so as to ensure the safety and stability of a negative pressure environment; the existing multi-module power distribution management mode generally adopts centralized dispatching communication or independently configures large-capacity energy storage equipment for each node, wherein the centralized dispatching mainly relies on a central programmable logic controller to carry out communication polling, and then issues power supply dispatching instructions after the pressure difference change is judged through software; The centralized power distribution architecture solves the problem of global energy balance under the conventional steady state, but when facing a transient voltage-losing working condition caused by sudden opening of a cabin door, the air pressure changes to a serial link from software to electric energy scheduling, which can generate obvious system delay and can not meet the transient peak power response requirement of urgent needs of a fan; Therefore, how to get rid of central dispatching communication delay under the condition of weak power grid total input power capping and realize self-organizing cross-cabin mutual power supply and dynamic energy closed loop of instantaneous peak power among multiple modules becomes the problem to be solved. Disclosure of Invention The invention aims to provide an intelligent power distribution and energy consumption management system of negative pressure cabin equipment, which solves the following technical problems: and constructing a hardware-level electric energy mutual-aid channel without communication by utilizing air pressure mapping and node potential difference so as to realize extremely low-delay mutual-aid power supply and transient negative pressure quick recovery of the multi-cabin module based on hardware-level response under the conditions of weak power grid and limited total input power, and simultaneously realize closed-loop management of redundant feedback electric energy in the micro-power grid, and can accurately quantitatively evaluate the deep blocking and fading state of an internal air filter without additional wind speed equipment. The aim of the invention can be achieved by the following technical scheme: The intelligent power distribution and energy consumption management system of the negative pressure cabin equipment comprises a rectifying and voltage stabilizing cabinet arranged at an access end of a main power grid, a direct current shared bus penetrating through a plurality of container type negative pressure purification modules and a gas-electricity coupling node box arranged in each module, wherein an air filter, a negative pressure fan and a heat energy conversion load unit are arranged in each container type negative pressure purification module, the gas-electricity coupling node box comprises a bidirectional direct current-direct current converter, a super capacitor and a microcontroller, and the gas-electricity coupling node box further comprises: The state acquisition module is used for acquiring real-time differential air pressure signals between the inside of each container type negative pressure purification module and the external reference environment; The equivalent mapping module is used for establishing a gas-electricity isomorphic equivalent circuit model based on the real-time differential air pressure signals, and mapping the state information of the internal equipment of the container type negative pressure purification module into virtual impedance parameters on the direct current shared bus according to a preset air pressure-impedance mapping relation; The voltage regulation and control module is used for real-time remolding the equivalent node voltage of the position where the gas-electricity coupling node box is connected to the direct current shared bus by changing the duty ratio of a power switch tube in the bidirectional direct current-direct current converter through the microcontroller based on the received real-time differential air pressure signal and combining the virtual impedance parameter; And the energy self-adaptive allocation module is used for forming a node voltage difference on the direct current shared bus according to the equivalent node voltage, and physically driving residual elect