Multi-period energy flow calculation method for electro-gas interconnection system considering multi-balance machine of power system and slow dynamic characteristics of natural gas system
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A power system and energy flow calculation technology, which is applied in the field of energy flow calculation of electrical-gas interconnection systems, can solve problems such as deviations in the actual operation of the system
Active Publication Date: 2018-11-23
CHONGQING UNIV
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For example, in "Electrical-Pneumatic Interconnected Integrated Energy System Multi-period Transient Energy Flow Simulation" in "Electric Power Automation Equipment", Volume 37, Issue 6, 2017, a single balancing machine is used to undertake the unbalanced power of the system, and the results obtained from the power flow calculation There may be a large deviation from the actual operation of the system
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Embodiment 1
[0134] see Figure 1 to Figure 4 , a multi-period energy flow calculation method for electric-gas interconnected systems considering the slow dynamic characteristics of multi-balancing machines in power systems and natural gas systems, mainly includes the following steps:
[0135] 1) Input the basic parameters of the power system and natural gas system, and set the Newton method convergence accuracy ε and total simulation time T max . According to the basic parameters of the power system and natural gas system, Newton's method convergence accuracy ε and total simulation time T max Establish a power system power flow model considering multiple balancing machines.
[0136] Further, the basic parameters of the electric power system and natural gas system mainly include electric power system network parameters and natural gas system parameters.
[0137] The power system parameters mainly include power system branch parameters, transformer parameters, generator parameters, load ...
Embodiment 2
[0259] A simulation experiment of a multi-period energy flow calculation method for an electric-gas interconnection system considering the slow dynamic characteristics of multi-balancing machines in power systems and natural gas systems, mainly includes the following steps:
[0260] 1) Input basic data and initialization
[0261] 1.1) Enter basic data
[0262] The electrical-gas interconnection system in this embodiment is an electrical-gas interconnection system formed by combining IEEE14-node power system and 6-node natural gas system
[0263] Input power system network parameters, including: branch parameters, transformer parameters, generator parameters, load parameters, node types. Natural gas system parameters: gas source parameters, gas transmission pipeline parameters, load parameters of each node, and initial balance node pressure. Sets the convergence accuracy of Newton's method. The power system network parameters use IEEE14 node power network data, and the natur...
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Abstract
The invention discloses a multi-period energy flow calculation method for electro-gas interconnection system considering multi-balance machine of power system and slow dynamic characteristics of natural gas system. The method mainly comprises the following steps: 1) establishing a power system power flow model considering a multi-balance machine.2)solving the flow distribution of the power systemby means of Newton method.3)building a natural gas system transient energy flow model.4)solving the energy flow distribution of the natural gas system by means of Newton method.5)judging whether thetotal simulation time Tmax is reached, if the total simulation time is not reached, taking the energy flow calculation result of the natural gas system as the initial value of the next moment energy flow , repeating the steps 2) to 4), and if the total simulation time is reached, putting an end to calculation and outputting the power flow distribution of the power system and the energy flow distribution result of the natural gas system. The multi-period energy flow calculation method for electro-gas interconnection system considering multi-balance machine of power system and slow dynamic characteristics of natural gas system simultaneously considers the multi-balance machine of the power system and slow dynamic characteristics of the natural gas system in the energy flow calculation of theelectro-gas interconnection system, and can obtain a more accurate system operation state.
Description
technical field [0001] The invention relates to the technical field of energy flow calculation of an electric-gas interconnection system, in particular to a multi-period energy flow calculation method for an electric-gas interconnection system considering the slow dynamic characteristics of multi-balancing machines in electric power systems and natural gas systems. Background technique [0002] Energy flow calculation, as the basic operation of the electrical-gas interconnection system, is the basis for the operation and planning of the electrical-gas interconnection system. In the actual system, there will be load fluctuations, disconnection faults and other situations that affect the energy flow of the electrical-gas interconnection system. Therefore, it is necessary to study the calculation method of energy flow in electrical interconnection system. [0003] In the energy flow calculation methods of the existing electric-gas interconnection system, when calculating the e...
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