CN-122014590-A - Dynamic regulation control method and system for energy storage fire water pump pressure

CN122014590ACN 122014590 ACN122014590 ACN 122014590ACN-122014590-A

Abstract

The invention belongs to the technical field of intelligent control, and discloses a dynamic regulation control method and a dynamic regulation control system for an energy storage fire water pump pressure; the method comprises the steps of detecting whether the plug boxes output fire confirmation signals meeting protection judging conditions, acquiring corresponding fire plug box information, extracting row vectors corresponding to fire plug boxes k from a pre-analyzed hydraulic coupling matrix, calculating hydraulic risk grades and thermal state risk coefficients of non-fire plug boxes s in the row vectors, obtaining an optimal risk set minimum isolation set and a flow maintenance set, calculating a flow maintenance value for each non-fire plug box in the flow maintenance set, sending corresponding control instructions to each plug box, verifying whether the plug boxes meet synchronous conditions and improving the pressure of a fire pump from standby pressure to dynamic target pressure, detecting whether the fire plug boxes k meet fire releasing conditions, and recovering normal operation, otherwise continuing detection.

Inventors

ZHAO RONG
ZHOU YUAN
GAN JUNHAO
LIANG FUXIONG

Assignees

湖南西来客储能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. The dynamic pressure regulation control method for the energy storage fire water pump is characterized by comprising the following steps of: Acquiring current temperature values of all battery plug boxes to form a temperature vector, and detecting whether the plug boxes output fire confirmation signals meeting the protection judgment conditions in real time; Extracting a row vector corresponding to a fire plug box k from a pre-analysis hydraulic coupling matrix, combining a temperature vector, calculating the hydraulic risk level and a thermal state risk coefficient of each non-fire plug box s in the row vector, dividing to obtain an optimized risk set, extracting a minimum isolation set and a flow maintenance set from the optimized risk set, and calculating a flow maintenance value for each non-fire plug box in the flow maintenance set; Sending a corresponding control instruction to a cooling loop of a non-fire-condition plug box of an optimized risk set, sending an opening instruction to a fire-fighting branch of a fire-condition plug box k, verifying whether each plug box meets a synchronous condition, and if so, lifting the pressure of a fire-fighting water pump from standby pressure to dynamic target pressure; and detecting whether the fire plug box k meets the fire releasing condition, if so, recovering normal operation, and if not, continuing to detect.
2. The dynamic pressure regulation control method for the energy storage fire water pump according to claim 1, wherein each heat exchanger is arranged in each plug box, and each plug box comprises a cooling circuit and a fire control branch, wherein the cooling circuit and the fire control branch are both provided with controllable valves and flow sensors, and the cooling circuit is used for controlling temperature; The method for acquiring the information of the fire plug box comprises the following steps: If the detection result shows that the plug box sends out smoke alarm signals, the plug box is confirmed to be a preliminary fire, whether the battery temperature of the plug box exceeds a temperature protection threshold value or not and whether the temperature difference change rate of the battery temperature exceeds a mutation threshold value or not are detected, if the battery temperature exceeds the temperature protection threshold value, the occurrence of the fire is confirmed, a fire confirmation signal is output, the occurrence time of the fire is recorded, an event identifier is generated, the system operation mode is switched from a normal cooling mode to a fire emergency mode, and if not, the detection is continued.
3. The method for dynamically adjusting and controlling the pressure of an energy storage fire water pump according to claim 2, wherein the method for obtaining the optimized risk set comprises the following steps: The non-fire plug boxes with the hydraulic coupling degree not higher than the low risk threshold are divided into low risk sets, the non-fire plug boxes with the hydraulic coupling degree higher than the low risk threshold and not higher than the medium risk threshold are divided into medium risk sets, and the non-fire plug boxes with the hydraulic coupling degree higher than the high risk threshold are divided into high risk sets; Calculating a first difference value between the baseline temperature of the non-fire plug boxes s and the upper limit of the target temperature, calculating a second difference value between the battery thermal runaway early warning temperature and the upper limit of the target temperature, and calculating the ratio of the first difference value to the second difference value to obtain a thermal state risk coefficient, wherein the thermal state risk coefficient is 0 when the baseline temperature of the non-fire plug boxes s is equal to the upper limit of the target temperature, and 1 when the baseline temperature of the non-fire plug boxes s is equal to the battery thermal runaway early warning temperature; When the non-fire box s belongs to a high risk set but the thermal state risk coefficient is lower than a low risk intervention threshold, the non-fire box s is lowered to a medium risk set, when the non-fire box s belongs to a medium risk set but the thermal state risk coefficient is higher than a hot air risk intervention threshold, the non-fire box s is raised to the high risk set, and when the non-fire box s belongs to a low risk set but the thermal state risk coefficient is higher than the high risk intervention threshold, the non-fire box s is raised to the medium risk set; and traversing and adjusting all non-fire plug boxes, and summarizing the low risk set, the medium risk set and the high risk set to obtain an adjusted optimized risk set.
4. A method of dynamic regulation control of energy storage fire water pump pressure as claimed in claim 3 wherein the method of obtaining a minimum isolated set and a flow maintenance set comprises: the high risk set in the optimized risk set is extracted as the minimum isolation set, and the medium risk set and the low risk set in the optimized risk set are extracted as the flow maintenance set.
5. The method of dynamic pressure regulation control of an energy storage fire pump of claim 1, wherein the method of calculating a flow maintenance value for each non-fire plug in a flow maintenance set comprises: and calculating the product of the thermal state risk coefficient and the hot air risk adjustment coefficient of the non-fire plug box s, calculating a third difference value of the basic flow coefficient and the product, and calculating the product of the design flow of the non-fire plug box s in the normal cooling mode and the third difference value to obtain a flow maintenance value.
6. The method for dynamically adjusting and controlling the pressure of an energy storage fire pump according to claim 2, wherein the method for verifying whether each of the plug boxes satisfies the synchronization condition comprises: The method comprises the following steps of detecting whether cooling loop valves of all non-fire plug boxes in a minimum isolation set feed back a state signal that the valves are closed, detecting whether deviation of actual opening degrees of all controllable valves of all plug boxes in a flow maintenance set and a target opening degree corresponding to a flow maintenance value is smaller than an opening deviation threshold value, detecting whether deviation of flow of the cooling loop in the flow maintenance set and the flow maintenance value is smaller than the flow deviation threshold value, and detecting whether outlet pressure values of fire branch valves of fire plug boxes k are larger than the minimum pressure threshold value; When the judging results of the first condition to the fourth condition are yes or the total time consumption reaches the maximum waiting time, recording the synchronization completion time, calculating the actual synchronization time consumption, and if the actual synchronization time consumption is within the maximum waiting time and the first condition to the fourth condition are met, verifying that each plug-in box meets the synchronization condition.
7. The method for dynamically adjusting and controlling the pressure of the energy storage fire water pump according to claim 2, wherein the method for setting the pressure of the fire water pump to the dynamic target pressure comprises the following steps: Setting the pressure of a main pipeline as a target pressure, if a fire spreads to a new plug box, then increasing the target pressure to the new target pressure according to the number of the spread fire-fighting branches, specifically, calculating a fourth difference value between the number of the spread fire-fighting branches and a value 1, calculating a product of the fourth difference value and a pressure compensation increment, obtaining a compensation quantity, and calculating the sum of the target pressure and the compensation quantity to obtain the new target pressure.
8. The method for dynamically adjusting and controlling the pressure of an energy storage fire pump according to claim 1, wherein the method for detecting whether the fire plug k satisfies the fire release condition comprises: The condition A is to detect whether the duration that the temperature of the fire plug box k is continuously lower than the safe temperature reaches the stable duration; the condition B is whether the time length of outputting a normal signal by the smoke sensor for detecting the fire plug box k reaches the stable time length or not; the condition C is to detect whether the flow of the fire branch of the fire plug box k does not exceed a stable flow threshold; And when the judgment results of the condition A, the condition B and the condition C are all yes, judging that the fire condition releasing condition is met and releasing the fire condition.
9. The method for dynamically adjusting and controlling the pressure of the energy storage fire water pump according to claim 2, wherein the method for recovering the normal operation comprises the following steps: the water pump pressure is reduced from the target pressure to the standby pressure, whether the fire branch flow of the fire plug box k is reduced below a stable flow threshold is detected, if yes, a controllable valve of the fire branch of the fire plug box k is closed, and if not, the detection is continued; Restoring the cooling flow of all the plug boxes in the flow maintenance set from the flow maintenance value to the design flow in the normal cooling mode, opening controllable valves of cooling loops of all the non-fire plug boxes in the minimum isolation set after waiting for a restoration period, and restoring to the design flow in the normal cooling mode; and after the cooling loops of all the plug boxes are restored to normal operation, switching the system operation mode from the fire emergency mode to the normal cooling mode.
10. A dynamic regulation control system for the pressure of an energy storage fire water pump, which implements the dynamic regulation control method for the pressure of the energy storage fire water pump according to any one of claims 1 to 9, and is characterized by comprising: The fire detection module is used for acquiring current temperature values of all the battery plug boxes to form a temperature vector, detecting whether the plug boxes output fire confirmation signals meeting the protection judgment conditions in real time, acquiring fire plug box information if yes, and otherwise, continuing to detect; the flow analysis module is used for extracting a row vector corresponding to the fire plug box k from the pre-analysis hydraulic coupling matrix, combining the temperature vector, calculating the hydraulic risk level and the thermal state risk coefficient of each non-fire plug box s in the row vector, dividing to obtain an optimized risk set, extracting a minimum isolation set and a flow maintenance set from the optimized risk set, and calculating a flow maintenance value for each non-fire plug box in the flow maintenance set; The control scheduling module is used for sending a corresponding control instruction to a cooling loop of the non-fire-condition plug box of the optimized risk set, sending an opening instruction to a fire control branch of the fire-condition plug box k, verifying whether each plug box meets the synchronous condition, and if so, lifting the pressure of the fire control water pump from the standby pressure to the dynamic target pressure; and the release detection module is used for detecting whether the fire plug box k meets the fire release condition, if so, the normal operation is restored, and if not, the detection is continued.

Description

Dynamic regulation control method and system for energy storage fire water pump pressure Technical Field The invention relates to the technical field of intelligent control, in particular to a dynamic pressure regulating and controlling method and system for an energy storage fire water pump. Background In a large-scale electrochemical energy storage power station, particularly a container type energy storage system adopting high-energy-density batteries, battery clusters are densely distributed and share a cooling pipeline. When a single battery module is subjected to thermal runaway triggering automatic fire fighting, in order to prevent high-pressure fire extinguishing water flow which is rapidly increased to 0.6MPa from 0.3MPa from being split in a large amount to a cooling loop of a normal battery in parallel pipelines, so that the spraying pressure and the flow are insufficient to cause fire extinguishing failure, the existing safety regulations often force or default to execute a cutting strategy, and immediately close the cooling loops of all non-fire battery clusters. However, thermal runaway extinguishment of lithium batteries is a dynamic compaction process that lasts from tens of seconds to minutes during which the heat generation of normal batteries is not stopped. The rough whole-system cooling is interrupted, so that a large amount of normal batteries rapidly accumulate heat in the closed cabin, and the temperature of the batteries is extremely easy to exceed a safety threshold, thereby possibly inducing a new thermal runaway point to form a fire condition, but causing a secondary accident of system-level heat spreading. The inherent contradiction of this safety logic has become a core pain point that limits the development of energy storage systems to higher levels of safety and higher availability. In view of the above, the present invention provides a method and a system for dynamically adjusting and controlling the pressure of an energy storage fire water pump to solve the above-mentioned problems. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides the following technical scheme that the dynamic pressure regulating and controlling method for the energy storage fire water pump comprises the following steps: Acquiring current temperature values of all battery plug boxes to form a temperature vector, and detecting whether the plug boxes output fire confirmation signals meeting the protection judgment conditions in real time; Extracting a row vector corresponding to a fire plug box k from a pre-analysis hydraulic coupling matrix, combining a temperature vector, calculating the hydraulic risk level and a thermal state risk coefficient of each non-fire plug box s in the row vector, dividing to obtain an optimized risk set, extracting a minimum isolation set and a flow maintenance set from the optimized risk set, and calculating a flow maintenance value for each non-fire plug box in the flow maintenance set; Sending a corresponding control instruction to a cooling loop of a non-fire-condition plug box of an optimized risk set, sending an opening instruction to a fire-fighting branch of a fire-condition plug box k, verifying whether each plug box meets a synchronous condition, and if so, lifting the pressure of a fire-fighting water pump from standby pressure to dynamic target pressure; and detecting whether the fire plug box k meets the fire releasing condition, if so, recovering normal operation, and if not, continuing to detect. Further, each plug box is internally provided with a heat exchanger, and each plug box comprises a cooling loop and a fire control branch, wherein the cooling loop and the fire control branch are both provided with controllable valves and flow sensors, the cooling loop is used for controlling temperature, the fire control branch is used for performing graded active fire control, all loops are connected to a main pipeline in parallel, and the main pipeline is provided with a main pressure sensor and a main flow sensor; The method for acquiring the information of the fire plug box comprises the following steps: If the detection result shows that the plug box sends out smoke alarm signals, the plug box is confirmed to be a preliminary fire, whether the battery temperature of the plug box exceeds a temperature protection threshold value or not and whether the temperature difference change rate of the battery temperature exceeds a mutation threshold value or not are detected, if the battery temperature exceeds the temperature protection threshold value, the occurrence of the fire is confirmed, a fire confirmation signal is output, the occurrence time of the fire is recorded, an event identifier is generated, the system operation mode is switched from a normal cooling mode to a fire emergency mode, and if not, the detection is continued. Further, the method for obtaining the optimized risk set comprises the following steps: The