Power flow processing method for power-heat combined systems

Active Publication Date: 2019-03-01
ZHEJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned problems in the background technology, the present invention proposes a power flow processing method of the combined electric-heat system, which can be applied to the power flow processing of the combined electric-heat system, and solves the inaccuracy of the power flow processing of the combined electric-heat system in the prior art , technical problems that take up a lot of memory for a long time

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  • Power flow processing method for power-heat combined systems
  • Power flow processing method for power-heat combined systems
  • Power flow processing method for power-heat combined systems

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specific Embodiment

[0088] Specific examples include the following electricity-heat combined systems:

[0089] Such as figure 1 The combined electricity-heat system shown consists of four nodes. Among them, there are four nodes. Node 1 represents the upper power supply transformer and is the source node; Node 2 and Node 3 are both load nodes, and Node 4 is the combined heat and power unit. Node 1, Node 2, and Node 3 are connected through a power grid branch (ie, a power line), and Node 2 and Node 3 are connected to a combined heat and power unit (CHP) through a heat network branch (ie, a thermal pipeline).

[0090] And the known basic network data of the power grid and heating network are:

[0091] Grid:

[0092] Number of power nodes: 3;

[0093] Line parameters: line unit length resistance 3.7Ω / km, line unit length reactance 0.369Ω / km

[0094] Line length: Line 12: 0.01km; Line 23: 0.01km

[0095] Power node rated voltage: 220V;

[0096] The power of electrical equipment at the power loa...

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Abstract

The invention discloses a power flow processing method for power-heat combined systems. Aiming at a power-heat combined system, known basic network data of a power grid and a heat network are acquiredthrough a sensor in the power grid or a tool before calculation, processing is carried out according to the known basic network data to obtain post-power flow voltage Vi' of each node in the power grid and a post-power flow thermal medium flow-in temperature of each node in the heat network after power flow iteration, power flow iteration processing is carried out continuously, after the power flow iteration at each time, a maximum value between the thermal medium flow-in temperatures of each node in the heat network and a maximum value between the voltages of each node in the power grid before and after the power flow iteration are calculated, and judgement is carried out until requirements are met so as to complete power flow processing. The power flow processing method for power-heat combined systems is capable of carrying out calculation processing more rapidly, occupies small memory, is good in power flow result correctness, and is capable of optimizing the construction of the power-heat combined systems, providing correct data for power grid scheduling and enhancing the applicability of a direct power flow method.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control with multiple forms of energy, and in particular relates to a power flow processing method for a combined electric-heat system. Background technique [0002] At present, with the large-scale application of combined heat and power technology, the power-heat combined system has developed rapidly as a form of effectively improving energy utilization efficiency. The coupling of two different forms of energy brings many new challenges to the system when determining operating parameters and state variables. [0003] The existing power flow processing methods can only deal with the power flow of the distribution network of the power system, and cannot deal with the coupling of electricity and heat. Therefore, there is a lack of a power flow processing method for the combined electricity and heat system. Contents of the invention [0004] Aiming at the above-mentioned problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06H02J3/46
CPCH02J3/06H02J3/46
Inventor 杨斌栾开宁周晓鸣阮文俊邵常政马琎劼王盛杨世海丁一曹晓冬谢康李波庄欣然陈宇沁包铭磊
Owner ZHEJIANG UNIV
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