System simulation analysis method and system for wind-solar power supply combined grid connection

A system simulation and analysis method technology, applied in the system simulation analysis method and system field of wind and solar power combined grid connection, can solve the problem of increasing system operation scheduling pressure, increasing load peak-valley difference, clean power supply fault ride-through characteristics, and grid security and stability. Uncertainty and other problems, to achieve the effect of accurate simulation decoupling analysis results

Pending Publication Date: 2020-11-13
CHINA ELECTRIC POWER RES INST +3
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  • Application Information

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Problems solved by technology

Clean power sources such as wind power and photovoltaics have the characteristics of volatility, randomness, and intermittency. When the output of clean power sources is inconsistent with load changes, it may increase the load peak-valley difference and increase the pressure on system operation and scheduling; fault ride-through characteristics of clean power sources The difference also brings great uncertainty to the security and stability of the power grid

Method used

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  • System simulation analysis method and system for wind-solar power supply combined grid connection
  • System simulation analysis method and system for wind-solar power supply combined grid connection
  • System simulation analysis method and system for wind-solar power supply combined grid connection

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Embodiment 1

[0051] A system simulation analysis method for combined grid-connected wind and solar power, such as figure 1 Shown: The method includes:

[0052] Step 1: Based on the pre-established power simulation model of wind turbines and photovoltaic power in the combined grid-connected system of wind and solar power, consider the superposition effect of wind resource characteristics and the difference in dynamic response to simulate the output power output characteristics;

[0053] Step 2: Decoupling the output characteristics of the output power based on the consideration of the coupling effect of wind power, photovoltaic power supply and grid interaction to obtain the simulation decoupling analysis results between variables;

[0054] Step 3: Based on the simulation decoupling analysis results, conduct a simulation evaluation of the impact and safety of the stable operation of the grid-connected system of wind and solar power;

[0055] Wherein, the variables include: the fan power su...

Embodiment 2

[0104] Based on the same inventive concept, the present invention also provides a system simulation and analysis system for combined wind and solar power grid connection, the system includes:

[0105] The simulation module is based on the pre-established power simulation model of wind turbines and photovoltaic power in the combined grid-connected system of wind and solar power, considering the superposition effect of wind resource characteristics and the difference in dynamic response to simulate the output power output characteristics;

[0106] The decoupling analysis module performs decoupling analysis on the output power output characteristics based on the consideration of the coupling effect of wind power, photovoltaic power supply and grid interaction to obtain the simulation decoupling analysis results between variables;

[0107] An evaluation module, based on the simulation decoupling analysis results, simulates and evaluates the impact and safety caused by the stable op...

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Abstract

The invention discloses a system simulation analysis method and system for wind-solar power supply combined grid connection. The method comprises the following steps: simulating output power output characteristics based on a power supply simulation model pre-established by a fan and a photovoltaic power supply in a wind-solar power supply combined grid connection system by considering the superposition effect of wind resource characteristics and the difference of dynamic response; decoupling the output power output characteristics on the basis of considering the mutual influence coupling effect of wind power, a photovoltaic power supply and a power grid to obtain a simulation decoupling analysis result among the variables; and performing simulation evaluation on impact and safety caused bystable operation of the wind-solar power supply combined grid-connected system based on the simulation decoupling analysis result. The variables comprise a fan power supply of a power grid, a photovoltaic power supply of the power grid and the power grid in the wind-solar-power combined grid-connected system. According to the technical scheme provided by the invention, impact of wind power integration on the stable operation of the power system is accurately evaluated.

Description

technical field [0001] The invention relates to the field of safety and stability of electric power systems, in particular to a system simulation analysis method and system for combined grid-connected wind and solar power sources. Background technique [0002] In recent years, domestic clean energy power generation technologies led by wind power and photovoltaics have developed rapidly. The penetration rate of wind power and photovoltaics has increased year by year, and the energy structure of some regions has undergone major changes. Taking Gansu Power Grid as an example, in 2016, the installed capacity of the wind power base in the Hexi Corridor exceeded 12 million kilowatts, and the solar power generated nearly 6 million kilowatts. According to the plan, the installed capacity of wind power in Gansu will further increase to 14.7 million kilowatts and 17.73 million kilowatts in 2017 and 2018. [0003] After large-scale clean energy is connected to the grid, the local powe...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46H02J2203/20H02J2300/28H02J2300/22Y02E10/76
Inventor 丁剑宋云亭郑超吉平李媛媛赵会莹梅文明张光亚赵莉莉
Owner CHINA ELECTRIC POWER RES INST
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