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Electro-thermal interconnection integrated energy system probabilistic power flow determination method based on analytical method

A technology of integrated energy system and probabilistic power flow, applied in the field of operation scheduling and control of integrated energy system, it can solve the problems such as the difficulty in exploiting the coupling and complementation of multi-energy systems and the lack of effective interaction of energy networks, and achieves a small amount of calculation, improves calculation efficiency, model simple effect

Pending Publication Date: 2021-11-23
STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, power systems and thermal systems generally have the characteristics of independent planning and independent operation, and there is a lack of effective interaction between various energy networks, making it difficult to take advantage of the coupling and complementarity of multi-energy systems.

Method used

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  • Electro-thermal interconnection integrated energy system probabilistic power flow determination method based on analytical method
  • Electro-thermal interconnection integrated energy system probabilistic power flow determination method based on analytical method
  • Electro-thermal interconnection integrated energy system probabilistic power flow determination method based on analytical method

Examples

Experimental program
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Effect test

Embodiment

[0123] Based on the modified IEEE33-node distribution network and 23-node heating network through CHP coupling, the following image 3 In the test example shown, the grid node 1 is a balance node with a voltage of 1.05p.u., node 2 is a PV node with a voltage amplitude of 1.049p.u., and the others are PQ nodes.

[0124] The CHP heat source temperature is constant at 80°C, the load node return water temperature is constant at 45°C, and the ambient temperature T a The temperature is 10°C, the test adopts Matlab programming, and the simulation environment is a PC with 1.9-GHz CPU and 4.0-GB RAM.

[0125] If the length of each pipeline is set to 500 meters, all heat loads are set to 0.5MW, and all heat load fluctuations are within ±10%. The flow mean value and the flow standard deviation obtained by the method of the present invention and the Monte Carlo method are respectively expressed as μ m , σ m , μ m,mcs and σ m,mcs , the flow mean error percentage and flow standard devi...

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Abstract

The invention discloses an electro-thermal interconnection integrated energy system probabilistic load flow determination method based on an analytical method and an approximation method, and the method comprises the following steps: obtaining a mean value and a variance of pipeline flow through digital characteristics of a normal distribution function, and then obtaining a mean value and a variance of node temperature by utilizing the property of a continuous random variable; after the thermal output probability distribution of the cogeneration unit is obtained, obtaining the power output probability distribution of the unit, and finally obtaining the probability distribution of each state variable of the power grid. According to the method provided by the invention, the steady-state power flow and the probabilistic power flow can be calculated without iteration, the problem of convergence does not exist, the calculation speed can be greatly improved while the calculation precision is ensured, and a reference can be provided for uncertainty analysis and risk assessment of the integrated energy system.

Description

technical field [0001] The invention relates to the technical field of operation scheduling and control of an integrated energy system, in particular to a method for determining a probabilistic power flow of an electric-thermal interconnected integrated energy system based on an analytical method. Background technique [0002] The regional integrated energy system takes the power system as the core, comprehensively considers various energy demands such as electricity, gas, and heat, and forms an integrated system with multi-energy synergy characteristics. However, at present, the power system and thermal system generally have the characteristics of independent planning and independent operation, and there is a lack of effective interaction between various energy networks, making it difficult to take advantage of the coupling and complementarity of multi-energy systems. With the rapid development of the Energy Internet, current research hotspots focus on the comprehensive pla...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/38H02J3/46G06F17/18
CPCH02J3/06H02J3/381H02J3/466G06F17/18H02J2203/10H02J2203/20H02J2300/20H02J2300/40Y02A30/60
Inventor 李红王文学伏祥运何维祥王博王炜张志福许其楼袁斌王舒捷
Owner STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO
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