CN-121983908-A - Multi-dimensional coupling control method and device for molten salt heat storage double-unit main protection device

CN121983908ACN 121983908 ACN121983908 ACN 121983908ACN-121983908-A

Abstract

The invention provides a multi-dimensional coupling control method and device for a molten salt heat storage double-unit main protection device, wherein the method comprises the steps of performing multi-dimensional state verification on the molten salt heat storage double-unit main protection device in a starting stage of the molten salt heat storage double-unit, sequentially putting the main protection device into operation according to a starting sequence based on a preset progressive operation strategy, and collecting operation parameters of a redundant measurement point group according to a preset redundant measurement point configuration strategy; the fused salt heat storage double-unit is subjected to multidimensional coupling control through a preset multilevel fault early warning protection strategy, the reliability of the main protection system under abnormal measuring points or fault working conditions is obviously improved through constructing a dynamic fault tolerance and self-healing mechanism, accurate early warning and gradient protection of double-unit operation risks are realized by means of a multilevel and multiparameter cooperative control strategy, a self-adaptive protection system covering all working conditions is formed, and the safety and stability of the fused salt heat storage system under dynamic operation environments such as deep peak shaving and the like are comprehensively enhanced.

Inventors

LI YU
KONG YOUSHUN
WANG QI
XU YONGWEI

Assignees

北京华科同和科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251209

Claims (12)

1. The multidimensional coupling control method of the molten salt heat storage double-unit main protection device is characterized by comprising the following steps of: In the starting stage of the molten salt heat storage double unit, performing multidimensional state verification on a main protection device of the molten salt heat storage double unit; if the multi-dimensional state verification is passed, sequentially putting the main protection device into operation according to a starting sequence based on a preset progressive operation strategy; In the operation stage of the molten salt heat storage double-unit, according to a preset redundant measuring point configuration strategy, collecting operation parameters of a redundant measuring point group; And carrying out multidimensional coupling control on the fused salt heat storage double units according to the operation parameters by a preset multilevel fault early warning protection strategy.
2. The multi-dimensional coupling control method of the molten salt heat storage double-unit main protection device according to claim 1, wherein the multi-dimensional state verification comprises initialization verification, valve position verification and redundancy measuring point consistency detection; In the starting stage of the molten salt heat storage double-unit, the multi-dimensional state verification is performed on the main protection device of the molten salt heat storage double-unit, and the method comprises the following steps: initializing and checking the main protection device to obtain an initializing and checking result; Performing valve position verification through a limit switch and a valve position feedback signal to obtain a valve position verification result; Performing redundancy measurement point consistency detection on the acquired initial state parameters of the redundancy measurement point group to obtain a redundancy measurement point consistency detection result; if the initialization check result, the valve position check result and the redundant measuring point consistency detection result are all check passing, determining that the multidimensional state check passes; And if at least one of the initialization check result, the valve position check result and the redundant measuring point consistency detection result is a check failure, determining that the multi-dimensional state check fails.
3. The multi-dimensional coupling control method of the molten salt heat storage double-unit main protection device according to claim 2, wherein the valve position verification is performed through a limit switch and a valve position feedback signal to obtain a valve position verification result, and the method comprises the following steps: judging whether the valve position is at a preset position or not through a limit switch and a valve position feedback signal; if yes, determining that the valve position verification result is verification passing; if not, determining that the valve position check result is a check failure.
4. The multi-dimensional coupling control method of the molten salt heat storage double-unit main protection device according to claim 3, wherein the detecting the consistency of the redundant measuring points on the initial state parameters of the collected redundant measuring point group to obtain the consistency detection result of the redundant measuring points comprises the following steps: judging whether the maximum deviation between the measuring points is smaller than a preset first deviation threshold value according to the state parameters of the redundant measuring point group; if yes, determining that the consistency detection result of the redundant measuring points is verification passing; If not, determining that the consistency detection result of the redundant measuring points is verification failure.
5. The multi-dimensional coupling control method of the molten salt heat storage double-unit main protection device according to claim 1, wherein before the main protection device is put into operation in turn according to a starting sequence based on a preset progressive operation strategy, the method further comprises: collecting unit loads of the fused salt heat storage double units; judging whether preset operation conditions are met or not according to the unit load; If yes, continuing to execute the step of orderly putting the main protection device into operation according to the starting sequence based on the preset progressive operation strategy; And if not, continuing to execute the step of collecting the unit load of the molten salt heat storage double unit.
6. The multi-dimensional coupling control method of the molten salt heat storage double-unit main protection device according to claim 1, wherein the redundancy measure point configuration strategy comprises a first trip logic and a second trip logic; In the fused salt heat storage double-unit operation stage, according to a preset redundant measuring point configuration strategy, collecting operation parameters of a redundant measuring point group, including: Judging whether at least one measuring point fails; if so, judging whether the maximum deviation among the rest measuring points is larger than a preset second deviation threshold value; If yes, triggering locking operation; If not, acquiring the operation parameters according to the second tripping logic; And if the operation parameters do not exist, acquiring the operation parameters according to the first tripping logic.
7. The multi-dimensional coupling control method of the molten salt heat storage double-unit main protection device according to claim 1, wherein the multi-level fault early-warning protection strategy comprises a multi-level early-warning threshold range and corresponding early-warning strategy actions; The multi-dimensional coupling control is performed on the fused salt heat storage double-unit according to the operation parameters by a preset multi-level fault early warning protection strategy, and the method comprises the following steps: matching the operation parameters with an early warning threshold range to obtain corresponding early warning strategy actions; and executing the early warning strategy action to complete multidimensional coupling control of the fused salt heat storage double units.
8. The multi-dimensional coupling control method of a molten salt heat storage double-unit main protection device according to claim 1, further comprising: And in the fused salt heat storage double-unit deep peak regulation stage, starting a preset protection strategy for the main protection device, wherein the protection strategy comprises self-adaptive adjustment of a protection threshold value and the acquisition frequency of the operation parameters of the unit.
9. The utility model provides a multi-dimensional coupling controlling means of two unit main protection device of fused salt heat accumulation, its characterized in that, the device includes: the multi-dimensional state verification unit is used for carrying out multi-dimensional state verification on the main protection device of the molten salt heat storage double unit in the starting stage of the molten salt heat storage double unit; The progressive operation unit is used for sequentially putting the main protection device into operation according to the starting sequence based on a preset progressive operation strategy if the multi-dimensional state verification is passed; The operation parameter acquisition unit is used for acquiring operation parameters of the redundant measuring point group according to a preset redundant measuring point configuration strategy in the operation stage of the molten salt heat storage double unit; And the multidimensional coupling control unit is used for carrying out multidimensional coupling control on the fused salt heat storage double units according to the operation parameters through a preset multilevel fault early warning protection strategy.
10. A computer readable medium having stored thereon a computer program, characterized in that the program when executed by a processor implements the multi-dimensional coupling control method of a molten salt heat storage double unit main protection device according to any one of claims 1 to 8.
11. A computer device comprising a memory for storing information including program instructions and a processor for controlling execution of the program instructions, characterized in that the program instructions, when loaded and executed by the processor, implement the multi-dimensional coupling control method of the molten salt heat storage double unit main protection device of any one of claims 1 to 8.
12. A computer program product comprising computer programs/instructions which when executed by a processor implement the multi-dimensional coupling control method of a molten salt heat storage double unit main protection device of any one of claims 1 to 8.

Description

Multi-dimensional coupling control method and device for molten salt heat storage double-unit main protection device Technical Field The invention relates to the technical field of computers, in particular to a multidimensional coupling control method and device for a molten salt heat storage double-unit main protection device. Background With the continuous increase of the duty ratio of new energy power generation in the power grid, the thermal power generating unit needs to bear deeper peak shaving tasks to maintain the stability of the power grid, and meanwhile, reliable heat supply capacity needs to be ensured. In a city thermal power plant which bears the dual tasks of power supply and heat supply, a steam supply system of the city thermal power plant is subjected to remarkable fluctuation in the process of frequent peak shaving, so that the overall operation stability is influenced. Although the conventional technical transformation scheme can depress the valley load, the operation capability of 'peak top' is difficult to realize, and the 'teeterboard' effect between heat supply and power generation becomes a key factor for restricting the stability of a power grid. In this context, molten salt heat storage systems are considered as effective technical paths for achieving thermal power flexibility modification due to their high energy density, low operating costs and good temperature stability. The typical ternary molten salt system has a wide working temperature range (142-450 ℃) and is particularly suitable for large-scale heat storage application. However, the protection and control technology applied to the molten salt heat storage system has obvious limitations. Firstly, at the system architecture level, the traditional protection logic is mostly fixed configuration, when a measuring point fails, the system cannot be dynamically adjusted, misoperation or refusal of the protection system is extremely easy to occur, and the redundant fault tolerance capability is insufficient. Secondly, when a plurality of units share a steam pipeline in the coordination control layer, the risks of steam flow conflict and pipeline overtemperature exist. Moreover, in the aspect of dynamic adaptability, the response of the existing protection strategy to the load change of the unit is delayed, the cutting condition of the existing protection strategy often depends on a single threshold value, and frequent protection actions are easily caused when the working condition fluctuates, so that the continuous operation of the system is influenced. In addition, the prior art has defects in the aspects of signal anti-interference processing, logic completeness of molten salt pump shutdown interlocking, misoperation prevention design of man-machine interaction and the like. In summary, the prior art is difficult to meet the high requirements of the fused salt heat storage system on protection reliability, coordination and adaptability under the high-temperature, high-pressure and multi-unit collaborative operation environment. This restricts the large-scale safe application of the fused salt heat storage technology in the thermal power depth peak shaving scene, so a more intelligent and robust control protection method is needed. Disclosure of Invention The invention aims to provide a multidimensional coupling control method of a fused salt heat storage double-unit main protection device, which remarkably improves the reliability of a main protection system under abnormal measuring points or fault working conditions by constructing a dynamic fault tolerance and self-healing mechanism, realizes accurate early warning and gradient protection of double-unit operation risks by means of a multilevel and multiparameter cooperative control strategy, effectively solves the coordination and control problems under complex working conditions, forms a self-adaptive protection system covering all working conditions, and comprehensively enhances the safety and stability of the fused salt heat storage system under dynamic operation environments such as deep peak shaving and the like. The invention further aims to provide a multidimensional coupling control device of the fused salt heat storage double-unit main protection device. It is yet another object of the present invention to provide a computer readable medium. It is a further object of the invention to provide a computer device. In order to achieve the above purpose, the invention discloses a multidimensional coupling control method of a molten salt heat storage double-unit main protection device, which comprises the following steps: in the starting stage of the molten salt heat storage double unit, performing multidimensional state verification on a main protection device of the molten salt heat storage double unit; if the multi-dimensional state verification is passed, sequentially putting the main protection device into operation according to a starting sequence based on a preset pr