A steady-state and transient hydraulic testing system and analysis method for a heating system

Abstract

The present application relates to the technical field of heat supply test, mainly to the steady state and transient hydraulic test of long distance heat supply system in high-cold area, discloses a kind of steady state and transient hydraulic test system and analysis method of heat supply system, to the steady state and transient hydraulic test of long distance heat supply system in high-cold area, through the simulation of long distance pipe network in equal proportion reduction, simulation test bench is built, and through the active stop of valve and water pump in simulation test bench to carry out fault simulation, convenient to use at the same time, set measuring point, carry out flow and pressure detection, realize the real-time effective detection of data under different fault conditions, provide effective reference data for long distance pipe network in actual use process, and through the way of simulation test bench test, the safety and economy of the conveying mode selection, effectively improve the functionality of simulation test bench, while ensuring the safety of long distance heat supply system, so that power plant and load side effectively match.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat supply testing, and mainly to steady-state and transient hydraulic testing of long-distance heat supply systems in high-cold regions, in particular to a heat supply system steady-state and transient hydraulic testing system and analysis method. BACKGROUND

[0002] Long-distance heat supply systems are an important technical path to achieve carbon peak and carbon neutralization in the field of heat supply. Although there are actual projects implemented in China, the research on the operation mode and regulation strategy of such systems is still insufficient, and there are many technical gaps. In actual operation, there is a lack of relevant theoretical guidance, and there are problems such as insufficient safety measures, high energy consumption, and mismatch between power plants and load sides. The contradictions in the production process are more prominent.

[0003] In long-distance engineering, there are problems of safety and economy of long-distance transportation pipelines, so it is necessary to study the key technologies such as source-network coordination and dynamic safety of long-distance heat supply systems to guide the optimization design and safe operation of long-distance heat supply networks. Through the coordination of heat supply sides and demand sides, the economy of the system is improved. SUMMARY

[0004] In order to overcome the defects of the prior art, the purpose of the present application is to provide a heat supply system steady-state and transient hydraulic testing system and analysis method to solve the technical problems of insufficient safety measures, high energy consumption, and mismatch between power plants and load sides in long-distance heat supply systems in the prior art.

[0005] The present application is achieved by the following technical solutions:

[0006] A heat supply system steady-state and transient hydraulic testing system, comprising a heating testing system, the heating testing system comprising a simulation building unit, a fault simulation unit, a safety analysis unit and a model adjustment unit; the output end of the simulation building unit is connected to the input end of the fault simulation unit, the output end of the fault simulation unit is connected to the input end of the safety analysis unit, and the output end of the safety analysis unit is connected to the model adjustment unit.

[0007] Preferably, the simulation building unit comprises a proportional simulation module, a drive control module and a pressure detection module; the proportional simulation module is signal connected with the drive control module and the pressure detection module respectively, and the drive control module and the pressure detection module are signal connected with the fault simulation unit respectively.

[0008] Further, the simulation building unit further comprises a flow detection module, one end of the flow detection module being signal connected with the proportional simulation module; the other end of the flow detection module being signal connected with the fault simulation unit.

[0009] Preferably, the fault simulation unit includes a pump fault simulation module, a valve fault simulation module, and a data storage module; one end of the data storage module is connected to the simulation building unit, and the other end is connected to the pump fault simulation module and the valve fault simulation module respectively; the pump fault simulation module and the valve fault simulation module are respectively connected to the safety analysis unit.

[0010] Furthermore, the fault simulation unit also includes multiple fault simulation modules, one end of which is connected to the connection end of the data storage module, and the other end is connected to the security analysis unit.

[0011] Preferably, the safety analysis unit includes a fault setting module and a threshold setting module.

[0012] Preferably, the model adjustment unit includes a transient model building module and a model comparison module. The input end of the transient model building module is connected to the output end of the security analysis unit, and the output end of the transient model building module is connected to the input end of the model comparison module.

[0013] Furthermore, the model adjustment unit also includes an error analysis module, the input of which is connected to the model comparison module.

[0014] A method for steady-state and transient hydraulic testing and analysis of a heating system, based on the aforementioned steady-state and transient hydraulic testing system for a heating system, is described in the following specific analysis method:

[0015] Safety analysis of water pump startup schemes: This study examines the safety of simultaneous startup of all water pumps at the first station, relay station, and pressure isolation station compared to the existing stepwise startup scheme. The startup control module controls the proportional simulation module through a drive control module. In the startup scheme, the water pump startup duration varies, with the specific startup duration determined by the proportional time. The flow detection module, pressure detection module, and data storage module record the flow and pressure at each measuring point under different startup schemes, and analyze the safety of different startup schemes.

[0016] Safety analysis of pump shutdown schemes: This study examines the safety of a simultaneous shutdown scheme involving all pumps at the primary station, relay station, and pressure isolation station, compared to the existing stepwise shutdown scheme. The shutdown control module controls the proportional simulation module through a drive control module. In the shutdown schemes, the pump shutdown duration varies, with the specific duration determined by the proportional time. The flow detection module, pressure detection module, and data storage module record the flow and pressure changes at each measuring point under different shutdown schemes, and analyze the safety of different shutdown schemes.

[0017] Research on the regulation of operating pressure and flow characteristics: This study investigates the flow regulation range and local pressure under various variable frequency operating conditions of water pumps. It summarizes and analyzes the impact of water pump regulation sequence on local pressure, regulation response time, and overall system safety under different flow change requirements, and studies the range of the safe regulation domain.

[0018] Analysis of local water leakage: By opening the local drain valve, the changes in pressure and flow rate in the pipeline of the simulated test bench when there is local water leakage are studied. The gradient of pressure and flow rate changes with different leakage rates is studied. Based on the analysis of parameter change gradients, targeted early warning measures are proposed.

[0019] Analysis of the flow and pressure characteristics of water replenishment under overpressure: By increasing the water replenishment pressure in the simulation test bench through the water replenishment pump, the flow and pressure change characteristics in the simulation test bench when water replenishment is overpressured are studied. Based on the change trend and gradient of the parameters, the rate of water replenishment and its impact on safety are judged, and targeted early warning measures are proposed.

[0020] Safety analysis of pump failure shutdown conditions: Under different steady-state hydraulic conditions, the drive control module drives the pump failure simulation module to control any number of pumps to stop directly and disconnect power. Pump shutdown conditions are divided into first-station shutdown, intermediate-station shutdown, and pressure isolation station shutdown, with the specific number of pumps shut down at each station ranging from one to four. The flow detection module, pressure detection module, and data storage module record the flow and pressure changes at each measuring point under different pump failure shutdown conditions. The safety analysis unit is used to analyze the safety of pump failure shutdown under the existing long-distance pipeline network. For overpressure, water hammer, and pressure below vaporization pressure, solutions based on pump valve linkage, bypass setting, drainage and steam discharge are studied when pumps fail.

[0021] Safety analysis of erroneously closed electric valves: Under different steady-state hydraulic conditions, the drive control module drives the valve fault simulation module to control the relay station electric valve to close. The number of valves closed ranges from one to four. The flow detection module, pressure detection module, and data storage module record the flow and pressure changes at each measuring point under different valve closure conditions. The safety analysis unit is used to analyze the safety of erroneously closed electric valves in the existing long-distance pipeline network. For the problems of local overpressure, water hammer, and vaporization caused by valve closure, solutions based on pump-valve linkage, bypass setting, drainage and steam discharge are studied.

[0022] The analysis of multiple simultaneous fault conditions involves driving the multiple fault simulation module to conduct a fault simulation test on the simultaneous closure of several water pump valves in the first station, relay pump station and pressure isolation station. The flow detection module, pressure detection module and data storage module record the flow and pressure changes of each measuring point under different operating conditions. For local overpressure, water hammer and vaporization problems, solutions based on pump valve linkage, bypass setting and drainage and steam discharge are studied.

[0023] The safety analysis unit uses the error analysis module to perform error analysis on the above simulation experiment results, and uses the fault setting module and threshold setting module to analyze the fault alarm thresholds under different working conditions.

[0024] The model adjustment unit uses the model comparison module to compare and adjust the fault threshold results of the safety analysis unit with the calculation results of the transient model building module.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] This invention provides a steady-state and transient hydraulic testing system for heating systems. For steady-state and transient hydraulic testing of long-distance heating systems in high-altitude and cold regions, a simulated test bench is constructed by proportionally scaling down the long-distance pipeline network. Fault simulation is performed by actively shutting down valves and pumps within the simulated test bench. The system is user-friendly, allows for the setting of measurement points to detect flow and pressure, and enables real-time and effective data monitoring under different fault conditions. This provides effective reference data for the actual use of long-distance pipeline networks. Furthermore, the simulated test bench allows for the selection of transmission methods based on safety and economy, effectively improving the functionality of the simulated test bench while ensuring the safety of long-distance heating systems and enabling effective matching between power plants and the load side.

[0027] Furthermore, by utilizing the drive control module to control the opening and closing of the water pump and valves, the system can be flexibly operated online during testing on the simulation test bench. By detecting the pressure and flow values ​​at the measuring points, the system fully realizes the purpose of online operation, improves testing efficiency, and ensures the accuracy and effectiveness of test data storage.

[0028] Furthermore, by shutting down different numbers of pumps and valves, the system can more flexibly and comprehensively simulate the fault conditions encountered by long-distance pipelines during actual operation, providing a basis for fault judgment when faults occur in the actual operation of long-distance pipelines, and thus more quickly locating the fault location.

[0029] Furthermore, by recording and storing flow and pressure data when the simulation test bench is damaged during testing, the safety threshold of the corresponding measuring point can be more accurately determined, thus providing early warning protection for the long-distance pipeline network during actual operation.

[0030] Furthermore, by using a transient mathematical model of hydraulic conditions to simulate the actual operation of long-distance pipelines, and combining it with actual test data from the simulation test bench, we can provide support for adjusting the parameters of the transient mathematical model of hydraulic conditions, and analyze the environment encountered by the simulation test bench and the actual operation of the long-distance pipeline. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the steady-state and transient hydraulic testing system for the heating system in this invention.

[0032] Figure 2This is a system principle block diagram of the simulation building unit in this invention;

[0033] Figure 3 This is a system principle block diagram of the fault simulation unit in this invention;

[0034] Figure 4 This is a system principle block diagram of the security analysis unit in this invention;

[0035] Figure 5 This is a system principle block diagram of the model adjustment unit in this invention.

[0036] In the diagram: 1-Heating test system; 2-Simulation building unit; 3-Safety analysis unit; 4-Model adjustment unit; 5-Scale simulation module; 6-Drive control module; 7-Pressure detection module; 8-Flow detection module; 9-Pump fault simulation module; 10-Valve fault simulation module; 11-Multiple fault simulation module; 12-Data storage module; 13-Fault setting module; 14-Threshold setting module; 15-Transient model building module; 16-Model comparison module; 17-Error analysis module; 18-Fault simulation unit. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] The present invention will now be described in further detail with reference to the accompanying drawings:

[0040] The purpose of this invention is to provide a steady-state and transient hydraulic testing system and analysis method for heating systems, so as to solve the technical problems of insufficient safety measures, high energy consumption and mismatch between power plants and load sides in the prior art for long-distance heating systems.

[0041] Specifically, such as Figure 1 As shown, the steady-state and transient hydraulic testing system for the heating system includes a heating test system 1, which includes a simulation building unit 2, a fault simulation unit 18, a safety analysis unit 3, and a model adjustment unit 4. The output of the simulation building unit 2 is connected to the input of the fault simulation unit 18, the output of the fault simulation unit 18 is connected to the input of the safety analysis unit 3, and the output of the safety analysis unit 3 is connected to the model adjustment unit 4.

[0042] Specifically, simulation unit 2 is used to build a scaled-down simulation test bench based on geometric, water hammer transmission, and pump similarity principles, with the number of pump sets and valves matching that of the actual long-distance pipeline network. After setting measurement points on the simulation test bench, flow rate and pressure at the measurement points are measured. See attached diagram for details. Figure 2 As shown, the simulation building unit 2 includes a scaled-down simulation module 5, a drive control module 6, a pressure detection module 7, and a flow detection module 8. The scaled-down simulation module 5 is used to build a scaled-down simulation test bench based on geometric, water hammer transmission, and pump similarity principles, with the number of pump sets and valves matching that of the actual long-distance pipeline network. The scaled-down simulation module 5 is connected to the drive control module 6, the pressure detection module 7, and the flow detection module 8, respectively.

[0043] The proportional simulation module 5 is connected to the drive control module 6, which is used to control the opening and closing of several pumps and valves in the pump group of the simulation test bench.

[0044] The proportional simulation module 5 is connected to the pressure detection module 7, which is used to detect the pressure value at the measuring point in the simulation test bench.

[0045] The proportional simulation module 5 is connected to the flow detection module 8, which is used to detect the flow rate at the measuring point in the simulation test bench.

[0046] By adopting the above technical solution and using the drive control module to control the opening and closing of the water pump and valve, the system can be directly and flexibly operated online when testing on the simulation test bench. Furthermore, by detecting the pressure values ​​and flow rates at the measuring points, the purpose of online office work has been fully realized, improving the efficiency of testing and ensuring the accuracy and effectiveness of test data storage.

[0047] Specifically, simulation unit 2 interfaces with fault simulation unit 18. Fault simulation unit 18 is used to start and stop the water pumps and valves in the simulation test bench pump group to simulate faults and store relevant simulation result data. See attached diagram for details. Figure 3 As shown, the fault simulation unit 18 includes a pump fault simulation module 9, a valve fault simulation module 10, a multi-fault simulation module 11, and a data storage module 12. The data storage module 12 is used to record and store the changes in pressure and flow at measuring points in different categories when different pumps and valves fail.

[0048] The water pump failure simulation module 9 is connected to the data storage module 12. The water pump failure simulation module 9 is used to shut down a set number of water pumps in the simulation test bench through the simulation building unit 2 to simulate water pump failure.

[0049] The valve failure simulation module 10 is connected to the data storage module 12. The valve failure simulation module 10 is used to close a set number of valves in the simulation test bench through the simulation building unit 2 to simulate valve failures.

[0050] The multiple fault simulation module 11 is connected to the data storage module 12. The multiple fault simulation module 11 is used to shut down a set number of water pumps and valves in the simulation test bench through the simulation building unit 2, so as to simulate the simultaneous failure of water pumps and valves.

[0051] By adopting the above technical solutions, different numbers of water pumps and valves can be shut down, which can more flexibly and comprehensively simulate the fault conditions encountered by long-distance pipelines in actual operation. This provides a basis for fault judgment when faults occur in the actual operation of long-distance pipelines, and thus more quickly locates the fault point.

[0052] Specifically, the fault simulation unit 18 interfaces with the safety analysis unit 3. The safety analysis unit 3 is used to record flow and pressure data and set safety thresholds when damage occurs during simulation testing on the simulation test bench. See attached diagram for details. Figure 4 As shown, the safety analysis unit 3 includes a fault setting module 13 and a threshold setting module 14;

[0053] The fault setting module 13 is used to record the damage caused by the simulated fault in the fault simulation unit 18;

[0054] The threshold setting module 14 is used to set the safety threshold of the measuring points based on the fault simulation and the measuring point data of the simulated test bench when damage occurs.

[0055] By adopting the above technical solution, when the simulation test bench is damaged during the test, the flow and pressure data are recorded and stored, thereby more accurately determining the safety threshold of the corresponding measuring point, which provides early warning protection for the long-distance pipeline network in actual operation.

[0056] Specifically, safety analysis unit 3 interfaces with model adjustment unit 4. Model adjustment unit 4 is used to construct a transient mathematical model of hydraulic conditions and, based on the simulation results from the simulation test bench, provides parameter adjustment basis to the transient mathematical model. See attached diagram for details. Figure 5 As shown, the model adjustment unit 4 includes a transient model building module 15, a model comparison module 16, and an error analysis module 17. The transient model building module 15 is used to build a transient mathematical model of hydraulic conditions.

[0057] The transient model building module 15 is connected to the model comparison module 16. The model comparison module 16 is used to compare and analyze the flow and pressure change data stored in the fault simulation unit 18 with the calculation results of the transient mathematical model, and to serve as the basis for adjusting the parameters of the transient mathematical model.

[0058] The model comparison module 16 is connected to the error analysis module 17, which is used to perform error analysis on the test results of the simulation test bench and the operation of the long-distance pipeline network.

[0059] By adopting the above technical solution, the transient mathematical model of hydraulic conditions is used to simulate the actual operation of long-distance pipelines. Combined with the actual test data of the simulation test bench, it provides support for adjusting the parameters of the transient mathematical model of hydraulic conditions, and analyzes the environment encountered by the simulation test bench and the actual operation of the long-distance pipeline.

[0060] The heating test system 1 in this invention consists of the following unit modules;

[0061] The main body of the simulation building unit 2 uses PB pipes;

[0062] Safety analysis unit 3 is implemented using a safety valve and a slow-closing check valve;

[0063] Model adjustment unit 4 is implemented using a bypass pipe and a manual valve device;

[0064] The proportional simulation module 5 uses a water pump model calculated based on a specific similarity principle;

[0065] The drive control module 6, water pump fault simulation module 9, valve fault simulation module 10, and multiple fault simulation module 11 adopt conventional PLC DO control modules;

[0066] Pressure detection module 7 uses a high-frequency pressure acquisition device;

[0067] Flow detection module 8 uses a vortex flow meter;

[0068] Data storage module 12 uses a portable hard drive;

[0069] The fault setting module 13 and the threshold setting module 14 are set using an industrial computer and a PLC.

[0070] The transient model building module 15, model comparison module, fault simulation unit, and error analysis module use self-developed software.

[0071] This invention also provides a method for steady-state and transient hydraulic testing and analysis of a heating system. Based on the aforementioned steady-state and transient hydraulic testing system for a heating system, the specific analysis method is as follows:

[0072] Safety analysis of water pump start-up schemes: This study examines the safety of simultaneous start-up of all water pumps at the first station, relay station, and pressure isolation station compared to the existing step-by-step start-up scheme. The start-up control module 6 controls the proportional simulation module 5. In the start-up schemes, the water pump start-up duration varies, with the specific start-up duration determined by the proportional time. The flow detection module 8, pressure detection module 7, and data storage module 12 record the flow and pressure at each measuring point under different start-up schemes, and analyze the safety of different start-up schemes.

[0073] Safety analysis of pump shutdown schemes: This study examines the safety of a simultaneous shutdown scheme for all pumps at the first station, relay station, and pressure isolation station, compared to the existing stepwise shutdown scheme. The shutdown control module 6 controls the proportional simulation module 5 to shut down the pumps. In each shutdown scheme, the pump shutdown duration varies, with the specific duration determined by the proportional time. The flow detection module 8, pressure detection module 7, and data storage module 12 record the flow and pressure changes at each measuring point under different shutdown schemes, and analyze the safety of different shutdown schemes.

[0074] Research on the regulation of operating pressure and flow characteristics: This study investigates the flow regulation range and local pressure under various variable frequency operating conditions of water pumps. It summarizes and analyzes the impact of water pump regulation sequence on local pressure, regulation response time, and overall system safety under different flow change requirements, and studies the range of the safe regulation domain.

[0075] Analysis of local water leakage: By opening the local drain valve, the changes in pressure and flow rate in the pipeline of the simulated test bench when there is local water leakage are studied. The gradient of pressure and flow rate changes with different leakage rates is studied. Based on the analysis of parameter change gradients, targeted early warning measures are proposed.

[0076] Analysis of the flow and pressure characteristics of water replenishment under overpressure: By increasing the water replenishment pressure in the simulation test bench through the water replenishment pump, the flow and pressure change characteristics in the simulation test bench when water replenishment is overpressured are studied. Based on the change trend and gradient of the parameters, the rate of water replenishment and its impact on safety are judged, and targeted early warning measures are proposed.

[0077] Safety analysis of pump failure shutdown conditions: Under different steady-state hydraulic conditions, the drive control module 6 drives the pump failure simulation module 9 to control any number of pumps to stop and directly cut off power. The pump shutdown conditions are divided into first station shutdown, relay station shutdown and pressure isolation station shutdown, with the specific number of pumps to be shut down at each station ranging from one to four. The flow detection module 8, pressure detection module 7, and data storage module 12 record the flow and pressure changes at each measuring point under different pump failure shutdown conditions. The safety analysis unit 3 is used to analyze the safety of pump failure shutdown under the existing long-distance pipeline network. For overpressure, water hammer, and pressure less than the vaporization pressure, solutions based on pump valve linkage, bypass setting, drainage and steam discharge are studied when the pump fails.

[0078] Safety analysis of the accidental closure of electric valves: Under different steady-state hydraulic conditions, the drive control module 6 drives the valve fault simulation module 10 to control the electric valves of the relay station to close. The number of valves closed ranges from one to four. The flow detection module 8, pressure detection module 7, and data storage module 12 record the flow and pressure changes at each measuring point under different valve closure conditions. The safety analysis unit 3 is used to analyze the safety of accidental closure of electric valves in the existing long-distance pipeline network. For the problems of local overpressure, water hammer, and vaporization caused by valve closure, solutions based on pump-valve linkage, bypass setting, drainage and steam discharge are studied.

[0079] The analysis of multiple simultaneous fault conditions is carried out. The drive control module 6 drives the multiple fault simulation module 11 to conduct a fault simulation test on the simultaneous closure of several water pump valves in the first station, relay pump station and pressure isolation station. The flow detection module 8, pressure detection module 7 and data storage module 12 record the flow and pressure changes of each measuring point under different operating conditions. For local overpressure, water hammer and vaporization problems, the solution based on pump valve linkage, bypass setting and drainage and steam discharge is studied.

[0080] Safety analysis unit 3 uses error analysis module 17 to perform error analysis on the above simulation experiment results, and uses fault setting module 13 and threshold setting module 14 to analyze the fault alarm threshold under different working conditions.

[0081] Model adjustment unit 4 uses model comparison module 16 to compare and adjust the fault threshold results of safety analysis unit 3 with the calculation results of transient model building module 15.

[0082] In summary, this invention provides a steady-state and transient hydraulic testing system and analysis method for a heating system, including a heating testing system comprising a simulation construction unit, a fault simulation unit, a safety analysis unit, and a model adjustment unit. This invention relates to the field of heating testing technology. This steady-state and transient hydraulic testing system for long-distance heating systems in high-altitude and cold regions constructs a simulation test bench by proportionally scaling down the long-distance pipeline network. Fault simulation is performed by actively shutting down valves and pumps within the simulation test bench. While being easy to use, it allows for the setting of measurement points to detect flow and pressure, achieving real-time and effective data detection under different fault conditions. This provides effective reference data for the actual use of long-distance pipeline networks. Furthermore, the simulation test bench method enables the selection of transportation methods based on safety and economy, effectively improving the functionality of the simulation test bench.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A steady-state and transient hydraulic testing system for a heating system, characterized in that, The system includes a heating test system (1), which includes a simulation building unit (2), a fault simulation unit (18), a safety analysis unit (3), and a model adjustment unit (4). The output of the simulation building unit (2) is connected to the input of the fault simulation unit (18), the output of the fault simulation unit (18) is connected to the input of the safety analysis unit (3), and the output of the safety analysis unit (3) is connected to the model adjustment unit (4). The safety analysis unit (3) uses a fault setting module (13) and a threshold setting module (14) to analyze the fault alarm threshold under different working conditions. The model adjustment unit (4) uses the model comparison module (16) to compare and adjust the fault threshold results of the safety analysis unit (3) with the calculation results of the transient model building module (15); The simulation building unit (2) includes a proportional simulation module (5), a drive control module (6) and a pressure detection module (7); the proportional simulation module (5) is connected to the drive control module (6) and the pressure detection module (7) respectively, and the drive control module (6) and the pressure detection module (7) are connected to the fault simulation unit (18) respectively. The simulation building unit (2) also includes a flow detection module (8), one end of which is connected to the proportional simulation module (5); the other end of which is connected to the fault simulation unit (18). The fault simulation unit (18) includes a pump fault simulation module (9), a valve fault simulation module (10), and a data storage module (12); one end of the data storage module (12) is connected to the simulation building unit (2), and the other end is connected to the pump fault simulation module (9) and the valve fault simulation module (10) respectively; the pump fault simulation module (9) and the valve fault simulation module (10) are respectively connected to the safety analysis unit (3); The fault simulation unit (18) also includes multiple fault simulation modules (11), one end of which is connected to the connection end of the data storage module (12), and the other end is connected to the security analysis unit (3). The security analysis unit (3) includes a fault setting module (13) and a threshold setting module (14). The model adjustment unit (4) includes a transient model building module (15) and a model comparison module (16). The input end of the transient model building module (15) is connected to the output end of the security analysis unit (3), and the output end of the transient model building module (15) is connected to the input end of the model comparison module (16). The model adjustment unit (4) also includes an error analysis module (17), the input of which is connected to the model comparison module (16).

2. A method for steady-state and transient hydraulic testing and analysis of a heating system, based on the steady-state and transient hydraulic testing system of the heating system described in claim 1, characterized in that, The specific analysis method is as follows: Safety analysis of water pump start-up schemes: The safety of the simultaneous start-up scheme of all water pumps in the first station, relay station and pressure isolation station and the existing step-by-step start-up scheme is studied. The start-up control of the proportional simulation module (5) is performed by the drive control module (6). In the start-up scheme, the start-up time of the water pumps takes different durations. The specific start-up time is determined by the proportional time. The flow detection module (8), pressure detection module (7) and data storage module (12) record the flow and pressure of each measuring point under different start-up schemes and analyze the safety of different start-up schemes. Safety analysis of pump shutdown schemes: The safety of the simultaneous shutdown scheme of all pumps in the first station, relay station and pressure isolation station and the existing step-by-step shutdown scheme is studied. The proportional simulation module (5) is shut down by the drive control module (6). In the shutdown scheme, the pump shutdown time takes different durations. The specific shutdown time is determined by the proportional time. The flow detection module (8), pressure detection module (7) and data storage module (12) record the flow and pressure changes of each measuring point under different shutdown schemes. The safety of different shutdown schemes is analyzed. Research on the regulation of operating pressure and flow characteristics: This study investigates the flow regulation range and local pressure under various variable frequency operating conditions of water pumps. It summarizes and analyzes the impact of water pump regulation sequence on local pressure, regulation response time, and overall system safety under different flow change requirements, and studies the range of the safe regulation domain. Analysis of local water leakage: By opening the local drain valve, the changes in pressure and flow rate in the pipeline of the simulated test bench when there is local water leakage are studied. The gradient of pressure and flow rate changes with different leakage rates is studied. Based on the analysis of parameter change gradients, targeted early warning measures are proposed. Analysis of the flow and pressure characteristics of water replenishment under overpressure: By increasing the water replenishment pressure in the simulation test bench through the water replenishment pump, the flow and pressure change characteristics in the simulation test bench when water replenishment is overpressured are studied. Based on the change trend and gradient of the parameters, the rate of water replenishment and its impact on safety are judged, and targeted early warning measures are proposed. Safety analysis of pump failure shutdown conditions: Under different steady-state hydraulic conditions, the drive control module (6) drives the pump failure simulation module (9) to control any number of pumps to stop directly and cut off the power. The pump shutdown conditions are divided into first station shutdown, relay station shutdown and pressure isolation station shutdown. The specific number of pumps to be shut down at each station ranges from one to four. The flow detection module (8), pressure detection module (7), and data storage module (12) record the flow and pressure changes at each measuring point under different pump failures. The safety analysis unit (3) is used to analyze the safety of pump failure shutdown under the existing long-distance pipeline network. For overpressure, water hammer and pressure less than vaporization pressure, the solution based on pump valve linkage, bypass setting, drainage and steam discharge is studied when the pump fails. Safety analysis of the working conditions of the electric valve that is accidentally closed. Under different steady-state hydraulic conditions, the drive control module (6) drives the valve fault simulation module (10) to control the electric valve of the relay station to close the valve. The number of valves closed is from one to four. The flow detection module (8), pressure detection module (7), and data storage module (12) record the flow and pressure changes of each measuring point under different valve closing conditions. The safety analysis unit (3) is used to analyze the safety of the electric valve that is accidentally closed under the existing long-distance pipeline network. For the problems of local overpressure, water hammer and vaporization caused by valve closure, a solution based on pump-valve linkage, bypass setting, drainage and steam discharge is studied. Analysis of multiple simultaneous fault conditions: The drive control module (6) drives the multiple fault simulation module (11) to conduct a fault simulation test on the simultaneous closure of several water pump valves in the first station, relay pump station and pressure isolation station. The flow detection module (8), pressure detection module (7), and data storage module (12) record the flow and pressure changes of each measuring point under different working conditions. For local overpressure, water hammer and vaporization problems, a solution based on pump valve linkage, bypass setting, drainage and steam discharge is studied. The error analysis module (17) performs error analysis on the above simulation results.

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