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A Method for Optimizing the Scheduling of Hydraulic Working Conditions of Multi-Heat Source Annular Central Heating Pipe Network

A technology for central heating and optimal scheduling, which is used in heating methods, household heating, heating systems, etc. to achieve reliable operation.

Active Publication Date: 2020-11-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing heat network regulation technology is still unable to realize the online optimal scheduling of the flow of multiple heat sources

Method used

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  • A Method for Optimizing the Scheduling of Hydraulic Working Conditions of Multi-Heat Source Annular Central Heating Pipe Network
  • A Method for Optimizing the Scheduling of Hydraulic Working Conditions of Multi-Heat Source Annular Central Heating Pipe Network
  • A Method for Optimizing the Scheduling of Hydraulic Working Conditions of Multi-Heat Source Annular Central Heating Pipe Network

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Embodiment Construction

[0031] The optimal scheduling problem of heat source flow in multi-heat source ring network can be reduced to the following optimization problem: under a certain water supply temperature, the flow demand of each end is known, and the flow and head of each heat source are unknown, the goal is to minimize the energy consumption of transmission and distribution , to optimize the optimal speed of each heat source pump and the valve opening of the end user to meet the needs of users. The optimization problem can be described as:

[0032] Objective function:

[0033]

[0034] Restrictions:

[0035] A·G=0 (2)

[0036] A T ·P=S·G a ·G+H (3)

[0037] G sub =G sub,n (4)

[0038] S sub,a ≥S sub,n (5)

[0039] 30Hz≤f j ≤50Hz (6)

[0040] Among them, W T is the total power of the heat source pump; g sc,j is the flow rate of the jth heat source pump; f j is the frequency of the jth heat source pump; H j (g sc,j , f j ) is the lift characteristic curve of the jth heat...

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Abstract

The invention discloses a hydraulic status optimization scheduling method for a multi-heat source annular centralized heat supply pipe network. The method comprises the steps of (1) giving user flow demands Gsub, n of heating stations; (2) setting an initial iterative point f0 of the frequency of a heat source pump, calculating flow G0 of branches and valve opening x0 of the heating stations, andsetting a step length relaxation factor defined in the specification; (3) calculating a generalized reduced gradient, defined in the specification, of total power consumption WT of the heat source pump under k working conditions, and improving the frequency fk+1 of the heat source pump along the reduced gradient; (4) performing Newton iterative calculation on valve opening xk+1 of the heating stations when the frequency of the heat source pump is fk+1 and the user flow demands are Gsub, n; and (5) calculating total power, defined in the specification, of the heat source pump, and judging whether a condition is met or not. According to the method, the water pump rotating speed and the valve opening of the multi-heat source annular network can be optimized online in real time; the problems of hydraulic disorder and transmission and distribution energy consumption optimization in a scheduling process of the multi-heat source annular network can be solved; the transmission and distributioncapability of the multi-heat source annular network is brought into full play; and the operation of the multi-heat source annular network is more reliable, efficient and energy-saving.

Description

technical field [0001] The invention relates to central heating technology, in particular to a multi-heat source circular central heating pipe network hydraulic working condition optimization scheduling method. Background technique [0002] In order to enhance the reliability of the heating network, the urban central heating system is gradually developing into a multi-heat source, large-scale complex ring topology. For example, the multi-heat source ring network in Tianjin has four thermal power plants and several gas-fired peak-shaving boiler rooms, with a total heating area of ​​nearly 200 million square meters (such as the attached figure 1 shown). The Shijiazhuang multi-heat-source circular centralized heating system has three heat sources, the number of heat stations has reached 1,138, and the total heating area has reached nearly 70 million square meters (see attached figure 2 shown). [0003] However, due to the large number of heat sources in the multi-heat sourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06F24D19/10
Inventor 由世俊王雅然张欢郑雪晶叶天震
Owner TIANJIN UNIV
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