Optimization regulation and control device and regulation and control method for most unfavorable heat supply loop
Through real-time feedback adjustment of the closed-loop control system and dynamic frequency adjustment algorithm, the problems of insufficient pressure difference and energy waste caused by the fixed frequency of the circulation pump in the traditional heating system are solved, and the stability and energy-saving effect of the heating system are achieved.
Patent Information
- Application Number
- CN202510731640.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2025-09-16
AI Technical Summary
The fixed frequency operation or manual adjustment of the circulation pump in the traditional heating system leads to insufficient pressure difference on the top floor, energy waste and lack of dynamic adjustment mechanism, and is unable to adapt to real-time changes in working conditions.
A real-time feedback closed-loop control system is adopted, combined with a dynamic adjustment algorithm for pressure difference and circulation pump frequency. The circulation pump frequency is dynamically adjusted through a pressure monitoring module, conventional PID and fuzzy PID controllers. Combined with an energy consumption optimization module and a fault diagnosis module, the stability and energy-saving goals of the heating system are achieved.
It achieves the stability and energy consumption optimization of the heating system, reduces fluctuations, improves the robustness and energy efficiency of the system, and has fault diagnosis capabilities to ensure operation in the lowest energy consumption range.
Smart Images
Figure CN120650773A_ABST
Abstract
Claims
1. A heating circuit optimization and control device, characterized in that It includes a primary network pipeline, a heat exchanger, a secondary network pipeline, a pressure monitoring module, a controller module, a circulation pump and an end user. The primary network pipeline is connected to the heat exchanger, the heat exchanger is connected to the secondary network pipeline, and the secondary network pipeline is connected to the end user through the pressure monitoring module, the controller module and the circulation pump.
2. The device for optimizing and controlling the most unfavorable heating loop according to claim 1 is characterized in that The pressure monitoring module includes a pressure transmitter, which is arranged on the top floor of the most unfavorable loop of the secondary network pipeline, and collects the supply and return water pressure signals in real time through the pressure transmitter.
3. The device for optimizing and controlling the most unfavorable heating loop according to claim 1 is characterized in that The controller module includes a conventional PID controller and a fuzzy PID controller. The conventional PID controller has a built-in data processing unit for receiving pressure data and calculating the pressure difference value (ΔPnow=PT1-PT2), and calculating the deviation value (ΔP=ΔPnow-ΔPset) based on the actual pressure difference data. The fuzzy PID controller is used to dynamically adjust the PID parameters according to ΔP and output the circulation pump frequency adjustment instruction.
4. The device for optimizing and controlling the most unfavorable heating loop according to claim 3 is characterized in that The conventional PID controller has a built-in execution module for converting the frequency instruction into a frequency converter control signal to drive the circulating pump motor.
5. The device for optimizing and controlling the most unfavorable heating loop according to claim 3 is characterized in that A conventional PID controller has a built-in energy consumption optimization module. The energy consumption optimization module has a built-in historical data learning algorithm to calculate the lowest frequency threshold that satisfies the condition |ΔP|<M.
6. The device for optimizing and controlling the most unfavorable heating loop according to claim 3 is characterized in that The conventional PID controller has a built-in fault diagnosis module, which is used to trigger an alarm and switch to manual adjustment mode if |ΔP|>M after N consecutive adjustments.
7. The device for optimizing and controlling the most unfavorable heating loop according to claim 5, characterized in that The energy consumption optimization module analyzes historical data to verify whether the frequency of the circulation pump is the lowest under the current working conditions while ensuring that the most unfavorable circuit pressure difference of the secondary pipe network meets the minimum condition. The lower the circulation pump frequency, the lower the energy consumption.
8. The device for optimizing and controlling the most unfavorable heating loop according to claim 1 is characterized in that The specific steps of dynamic regulation of the circulating pump are: Step 1: Set the pressure difference safety threshold ΔPset through the control system; Step 2: Use the pressure transmitter to collect the top floor water supply pressure PT1 and return water pressure PT2 in real time to obtain ΔPnow, and calculate ΔP based on the real-time collected ΔPnow; Step 3: If |ΔP|>M, the PID algorithm is triggered to generate the frequency increase Δf, which is nonlinearly positively correlated with ΔP. Step 4: Use the energy consumption optimization module to verify whether the newly generated frequency value fnew meets the minimum energy consumption condition, otherwise recalculate Δf; Step 5: Output the optimized frequency command to the inverter to complete closed-loop control.
9. The device for optimizing and controlling the most unfavorable heating loop according to claim 8, characterized in that The M is a pressure difference safety threshold, which is a preset constant.