Thermal Network Power Flow Calculation Method Based on Improved Jacobian Matrix
A technology of power flow calculation and heating network, applied in the direction of calculation, data processing application, system integration technology, etc., can solve the problems of low calculation efficiency and slow calculation efficiency, achieve wide application prospects, improve calculation accuracy, and reduce the number of iterations Effect
Active Publication Date: 2022-07-05
SOUTH CHINA UNIV OF TECH +1
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However, in this method, there is a disadvantage of low computational efficiency
The reason is that in this model, the Jacobian matrix of the heating network system derived by the author ignores the influence of pipeline flow and return water network on the water supply network, and ignores the influence of pipeline flow and water supply network on the return water network. In this part, the author's treatment is to set the off-diagonal lines in the Jacobian matrix of this part to zero, which will lead to slow calculation efficiency
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[0087] The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0088] like figure 1 As shown, this embodiment uses a 32-node multi-heat source heat network system as a simulation object to specifically illustrate the heat network power flow calculation method based on the improved Jacobian matrix provided by the present invention, and its network topology is as follows. figure 2 shown, the specific steps are as follows:
[0089] Step S1, obtaining network data of the heat network system, including: the total number of nodes in the heat network, the length L of each pipe, the heat conduction coefficient λ per unit length of the pipe, and the rated water supply temperature T at the heat source i i,source , rated outlet temperature T at load node i i,o , the heat load demand Φ at load node i i,LD , the thermal power Φ provided at the...
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The invention discloses a heating network power flow calculation method based on an improved Jacobian matrix. The steps are: acquiring network data of a heating network system; performing hydraulic model modeling and thermal model modeling of the heating network system; analyzing the hydraulic model and the water supply network The improved Jacobian matrix of the heat network system is obtained based on the interaction between the backwater network and the heat return network; according to the obtained improved Jacobian matrix, the iterative calculation based on the Newton-Raphson method is used until the system node error reaches the maximum convergence tolerance The degree or convergence times reach the maximum, and the power flow distribution results of the thermal network system are output. The method of the invention greatly improves the calculation speed and efficiency while ensuring the calculation accuracy, and has practical engineering value and wide application prospect.
Description
technical field [0001] The invention relates to the technical field of heat network system and energy flow calculation, in particular to a heat network power flow calculation method based on an improved Jacobian matrix. Background technique [0002] Integrated energy system is a major research hotspot in recent years, and energy flow calculation plays an important role in integrated energy system. The heat network is one of the subsystems of the integrated energy system. The modeling accuracy of the heat network system and the calculation efficiency of energy flow are key research issues. The heat network system is divided into a water supply network and a return water network. The heat network system uses water flow as a medium to transport heat to the user end through pipes, and after sufficient heat exchange with the plate exchange at the user end, it returns to the heat source through the return water pipe for regeneration. A round of heat exchange and heat transfer. ...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0631G06Q10/067G06Q50/06Y04S10/50
Inventor 郑杰辉吴翠清李志刚王丽晓吴青华孙谊媊王衡
Owner SOUTH CHINA UNIV OF TECH