Water pump system, water pump controller and control method based on decentralized network

A technology of water pump system and central network, applied in transmission system, network topology, program control and other directions, can solve problems such as poor scalability and poor operability, and achieve the effect of solving communication links, improving operation efficiency, and increasing control efficiency.

Active Publication Date: 2018-05-11
LYNKROS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the consequence is that if the optimal control of parallel pumps is to be realized, the performance parameters of all parallel pumps need to be written into the controller by the automatic control manufacturer, and the detailed performance parameters of the pumps are not disclosed by the pump equipment manufacturers. Therefore, the operability is poor
In addition, this centralized control method requires manual configuration of the controller and water pump, which brings a lot of on-site debugging work, and the scalability is relatively poor

Method used

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  • Water pump system, water pump controller and control method based on decentralized network
  • Water pump system, water pump controller and control method based on decentralized network
  • Water pump system, water pump controller and control method based on decentralized network

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Embodiment 1

[0060] like figure 1 As shown, a water pump system control method based on a decentralized network according to an embodiment of the present invention includes the following steps:

[0061] S101: Set up a controller for each water pump in the water pump system, and interconnect all the controllers to form a decentralized network.

[0062] Among them, the centerless network means that the status of each node in the network is equal, the entire network is flat, there is no concept of a center or a leader, the network can be a chain, a ring, or a grid Shape or star, that is, all nodes in the network are interconnected with a certain topological relationship, and information is transmitted between nodes that are interconnected in the topological relationship, and information exchange is not performed between nodes that are not related in the topological relationship. For the water pump system of the embodiment of the present invention, the status of each water pump in the decentr...

Embodiment 2

[0104] The specific way of information exchange between the water pumps (that is, the above step S103) can also use another algorithm, such as the method of optimizing distribution. Specifically, the water pump system in the embodiment of the present invention has a total constraint, that is, the total flow of the water pump should meet the total demand for flow at the end X 0 , so the problem is transformed into how to reasonably distribute these flows to each pump so that the total power consumption of the pump system is the lowest when the sum constraint is satisfied. When determining the optimal allocation scheme, the opening combination of the water outlet pumps can be determined first, and then the specific flow rate of the opened water pumps can be determined. After mathematical derivation, when the opening combination of the pumps is determined, the problem of how to optimally distribute the total flow among the pumps becomes very simple, that is, to distribute accordi...

Embodiment 3

[0118] Embodiment 2 introduces the first algorithm (i.e. mode 1) for determining the opening combination of the water pump (ie a part of step S103), and this embodiment introduces the second algorithm for determining the opening combination of the water pump, namely mode 2.

[0119] The algorithm is that each water pump controller has an initial turn-on probability, such as 0.5, after a certain water pump controller initiates a calculation task, each water pump controller (or node v i ) executes the following rules:

[0120] (1) node v i Initiate a global weighted summation task, that is, each node's own open probability is multiplied by its own x i * (the flow rate of the pump at the optimum efficiency point) and the sum of the results;

[0121] (2) node v i After receiving the weighted sum of other nodes except yourself, compare the result with adding your own open probability multiplied by your own x i * The result, if the result after adding is closer to X than the r...

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Abstract

The invention provides a centerless network based water pump system, a water pump controller, and a control method of a water pump system. The method comprises the following steps: water pumps in the water pump system are each provided with a controller, and all the controllers are interconnected to form a centerless network; when it is determined that certain trigger conditions are reached, the water pump controllers initiate adjusting tasks; the water pump controllers start interactions with adjacent water pump controllers; and after the plurality of interactions, the whole system reaches predetermined convergence conditions, operation parameters after the water pumps are optimized are determined, and according to the optimized operation parameters, the corresponding water pumps are controlled to reach corresponding operation states. According to invention, the method is based on the centerless network, the water pumps connected in parallel complete a control objective equally, independently and coordinately, an optimal control scheme is worked out in a distributed mode, the workload of manual configuration adjustment by use of a traditional control mode is greatly reduced, the purpose of plug-and-play of control equipment is achieved, and the control efficiency, robustness and expandability of the system are improved.

Description

technical field [0001] The invention relates to the technical field of building energy saving and intelligent control, in particular to a water pump system based on a decentralized network, a water pump controller and a control method. Background technique [0002] In the central air-conditioning water system, multiple variable frequency water pumps are usually used in parallel, and the demand at the end of the system is met by adjusting the start and stop status of the water pump and the speed of the water pump. [0003] In the existing water pump control system, a centralized control method is usually adopted, that is, a controller is used to control all parallel water pumps. However, the consequence is that if the optimal control of parallel pumps is to be realized, the performance parameters of all parallel pumps need to be written into the controller by the automatic control manufacturer, and the detailed performance parameters of the pumps are not disclosed by the pump...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08H04W84/18G05B19/418
CPCG05B19/418G05B19/41845G05B19/4185G05B2219/00
Inventor 姜子炎代允闯陈佩章
Owner LYNKROS TECH CO LTD
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