Monitoring method for wind-light integrated power generation system capable of automatically realizing voltage balance

Abstract

The invention discloses a monitoring method for a power generation system. The monitoring method comprises the following steps: S1. obtaining operational data of a wind power generation device and a photovoltaic power generation device in real time by monitoring modules of the wind power generation device and the photovoltaic power generation device, storing the data, performing real-time detection to obtain a SOC of a storage battery module, and obtaining a load power demand condition in a micro-grid in real time; according to the operational data of the wind power generation device and the photovoltaic power generation device, and the SOC of the storage battery module, predicting output active power and reactive power of the wind power generation device and a light storage device within a future predetermined moment; S2. acquiring grid-connection point voltage information, and predicting the output active power and reactive power of the wind power generation device and the light storage device within the future predetermined moment according to a large power grid scheduling instruction to form active and reactive output demands of the power generation system; and S3. by taking the active and reactive output demands of the power generation system, the current SOC of battery energy storage, the current load power demand in the grid, and the output active power and reactive power of the wind power generation device and the photovoltaic power generation device as constraint conditions, realizing optimized operation of the power generation system.

Description

Technical field [0001] The invention relates to a monitoring method of a wind and solar integrated power generation system that can automatically realize voltage balance. Background technique [0002] New energy power generation represented by wind and solar energy has attracted wide attention from all over the world due to its non-polluting and renewable advantages. However, the uncertainty and volatility of wind power and photovoltaic power generation have a certain impact on the stability of the grid voltage, and wind speed fluctuations will The grid-connected point voltage fluctuates, the randomness of active power output of photovoltaic power plants and the unfriendly characteristics of the grid also make the grid voltage unstable. [0003] The microgrid based on wind power and photovoltaic power generation, as a supplement to the ultra-high voltage, long-distance, and large-scale grid power supply mode, represents the new development direction of the power system. The drivin...

AI Technical Summary

Problems solved by technology

At the same time, since the wind turbine is an asynchronous machine, if it is not controlled, it needs to absorb a certain amount of reactive power while generating active power, and does not use the voltage stability of the system

When the wind power penetration rate is low, these effects are not obvious. With the increase of the wind power penetration rate, the impact of wind energy on the power system gradually increases. difficulty

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