Coordinated control method for power of wind power plant and system employing coordinated control method

Abstract

The invention relates to a coordinated control method for power of a wind power plant and a system employing the coordinated control method. The method comprises the steps as follows: wind power generators in a wind field are divided into m groups; the m groups of wind power generators are respectively marked as a first group, a second group, a third group, ..., and an mth group; the number of the wind power generators in each group is Oj; the total number of the wind power generators in the wind field is as shown in the specification; the entire power generation power is as shown in the specification, wherein alphaj is the power generation coefficient of the jth group of generators; Pk is the output power of the kth wind power generator; a group of corresponding alphaj when P is the maximal is determined through an optimal seeking method; and the alphajPk is controlled as the power limit of each wind power generator. The system comprises a data information collection sub-system, a cloud platform evaluation and optimization sub-system, a coordinated control sub-system for the wind power plant and a system database sub-system. According to the coordinated control method and the system, optimization of the generating capacity of the whole wind power plant and maximization of economic benefits can be realized; adverse wind conditions are avoided; a wind turbine unit is reasonably utilized; and meanwhile, a data condition is provided for reasonable arrangement of operation and maintenance work of the wind power plant.

Description

Technical field [0001] The present invention relates to the technical field of wind power, in particular to a method and system for coordinated control of wind farm power. Background technique [0002] Wind power has become a commercially competitive renewable energy power generation method. How to effectively improve the utilization of limited wind resources, the operating efficiency of wind farms, and the power output of wind farms have become major issues facing wind power operators. Traditional wind power control generally adopts a single-machine maximum power tracking (MPPT) control scheme, which is mainly to perform an isolated optimal control of a single wind turbine, so that the single wind turbine receives the effective wind speed to adjust the rotor speed to obtain the optimal wind energy utilization Coefficient, so as to maximize the capture of single-machine wind energy. In fact, due to the limited wind farm space, the topography of the wind farm, the wake effect bet...

AI Technical Summary

Problems solved by technology

In fact, due to the limited space of the wind farm, the topography of the wind farm, the wake effect between the units, and the different states of operation and maintenance of each unit, the units of the wind farm do not operate in isolation, but interact and interact with each other. As a result, the traditional wind farm control scheme and control mode cannot achieve the effect of optimizing the power generation of the whole wind farm and maximizing economic benefits.

[0003] At present, the conventional wind farm control system pursues the maximum power generation of the wind farm, and does not consider the maintenance and repair of the unit during high-load operation, the cost of frequent replacement of spare parts, and the increased cost of related human resources. The power generation of the whole site is maximized, but the overall economic benefits are declining

In practice, severe wind conditions often occur in wind farms, causing the units to shut down. However, in severe wind conditions, the duration of the limit wind speed is very short. This part of the power generation

The operation, maintenance and overhaul of wind farm units adopt routine planned maintenance and temporary problem maintenance mode, which are greatly limited in rationality and efficiency, and a more efficient maintenance mode requires long-term exploration of wind farms and accumulation of operation and maintenance. , a lot of manpower and material resources will be wasted during this period

[0004] It can be seen that the above-mentioned existing traditional wind power control method and its system obviously have inconvenience and defects in structure, method and use, and need to be further improved urgently.

Images