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Simulation equivalent method of wind-photovoltaics-energy storage joint power generation system

A technology of co-generation and equivalent method, applied in the field of power system, which can solve the problems of slow convergence, many total iterations, and poor practicability.

Active Publication Date: 2012-07-04
CHINA ELECTRIC POWER RES INST +1
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  • Description
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Problems solved by technology

[0012] (1) The simplified equivalent model of PQ and PV in the power flow calculation considers that the power factor of the wind farm is the same as that of a single wind turbine, and does not consider the influence of the internal power collection system of the wind farm. When the scale of the wind farm is large, it may lead to large calculation errors
[0013] (2) The iterative process of the RX equivalent model in the power flow calculation is completed in two steps: conventional power flow iterative calculation and asynchronous generator slip iterative calculation, the total number of iterations is large, the convergence speed is slow, and the practicability is poor
Therefore, the simple multiplication and equivalent method will have certain errors

Method used

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Embodiment

[0115] This equivalent method has been applied in the grid connection research of the first phase of the Zhangbei National Wind Storage and Transmission Demonstration Project. The implementation process is as follows:

[0116] 1. Using the design scheme of the first phase of the Zhangbei wind-solar storage and transmission demonstration project and the equivalent method of the collector system in Section 2.2.2.2 to obtain the equivalent collector system model and parameters of the entire combined power generation system;

[0117] 2. Use the overall modeling scheme and power flow calculation equivalent method in Sections 2.2.1 and 2.2.2 to establish a static equivalent model for the first phase of the wind-solar storage and transmission demonstration project, and realize the engineering-applicable power flow calculation function of the wind-wind-storage combined power generation system;

[0118] 3. Find the most serious working condition based on the principle of full output uni...

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Abstract

The invention belongs to the field of electrical power systems, which relates to a simulation equivalent method of a wind-photovoltaics-energy storage joint power generation system in load flow calculation and electromechanical transient simulation. An equivalent overall scheme of the wind-photovoltaics-energy storage joint power generation system adopts the method of combination equivalent. By dividing the joint power generation system into three parts including a wind power station, a photovoltaic power station and a battery energy storage power station, and enabling the three parts to perform equivalent polymerization respectively according to respective operating characteristics, a plurality of field / power station equivalent models after machine gathering are obtained. Finally, the wind power station, the photovoltaic power station and the battery energy storage power station converge at the point of a common coupling (PPC) to achieve grid connection. Operating characteristics of the whole wind-photovoltaics-energy storage joint power generation system are shown up on a power grid at the PPC, and equivalent modeling of the wind-photovoltaics-energy storage joint power generation system is achieved.

Description

technical field [0001] The invention belongs to the field of power systems, and relates to a simulation equivalent method of a wind-solar-storage combined power generation system in power flow calculation and electromechanical transient simulation. Background technique [0002] With the development of the country's new energy strategy, the development of new energy sources such as wind power and photovoltaics has been highly valued and strongly supported. The proportion of wind power and photovoltaic capacity in the power grid is getting higher and higher, and the impact is getting bigger and bigger. Both wind power and photovoltaic power generation have the characteristics of randomness, volatility and intermittency. Compared with conventional power sources, the independent power generation characteristics and source-network coordination of these two new energy sources are still quite different. However, wind energy and solar energy have good resource complementarity, are s...

Claims

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Application Information

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IPC IPC(8): G06F9/455
Inventor 王皓怀侯俊贤孙华东罗煦之仲悟之林伟芳王毅董毅峰
Owner CHINA ELECTRIC POWER RES INST
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