Wind/solar hybrid generation control method and system with function of reactive self-compensation

Abstract

The invention discloses a wind / solar hybrid generation control method and system with a function of reactive self-compensation. The method employs a method of reactive signal averaging, and employs the coordination of a plurality of photovoltaic power generation units at a wind / solar hybrid generation station for active / reactive control. A wind power generation unit outputs electric energy, and the quality of electric energy is solved at a high-voltage side of a draught fan box-type transformer. The photovoltaic power generation units achieve the active / reactive regulation of the whole power station. Reactive power compensated by a photovoltaic array is uniformly distributed to each unit photovoltaic power generation system. Each device of the whole power generation system is used reasonably, thereby achieving the reactive self-compensation of a wind / solar hybrid generation system, and achieve a purpose of maximizing benefits in a life cycle of the devices. The system makes the most of characteristics of two types of energy, reasonably uses each device of the system from the aspect of the whole power generation system, achieves the purpose of maximizing benefits in the life cycle of the devices, saves a dedicated reactive compensation device, reduces the initial investment, and improves the utilization rate of devices.

Description

technical field [0001] The invention belongs to the field of reactive power compensation in power generation and photovoltaic power generation, and particularly relates to a control method and system for wind and solar complementary power generation with reactive power self-compensation. Background technique [0002] Wind energy and solar energy are non-polluting, inexhaustible renewable energy sources. At present, there are many existing and under construction wind farms and photovoltaic power stations in my country. Both forms of power generation have their own advantages, but both wind and solar are unstable, discontinuous sources of energy. my country belongs to the monsoon climate zone. Generally, the winter monsoon is strong and the solar radiation intensity is small; the summer monsoon is small and the solar radiation intensity is high. The two energy sources can just complement each other. The wind-solar hybrid power generation system has many advantages: using the...

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Problems solved by technology

At present, the wind-solar hybrid power generation system mainly has the following deficiencies: 1. Simply connecting the two resources together does not make full use of the characteristics of the two energy sources to maximize the power generation efficiency of the two power generation equipment at the same time; 2. The wind turbine manufacturer And the photovoltaic inverter manufacturer only considers its own output power, and does not consider the maximum output power comprehensively from the perspective of the entire system; 3. Due to the actual situation, most of the working conditions of the fan and photovoltaic inverter do not reach full load running, the power conversion device has a certain power idle, and the resources are not fully utilized

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