Scattered-type wind power plant reactive power optimization control method capable of reducing fan losses and system

Abstract

The invention relates to a scattered-type wind power plant reactive power optimization control method capable of reducing fan losses and a system, and belongs to the technical field of wind power plant grid-connected operation reactive voltage control. The system comprises a processor, a storage module, an input and output module, a control area network (CAN)open gateway, a detection module and a router. The processor carries out control algorithm and calls the storage module and the input and output module. The input and output module is communicated with the detection module through the CANopen gateway and is communicated with a supervisory control and data acquisition (SCADA) of each fan through the route. Based on the principle that reactive power losses of all wind turbine generators are smallest, the system allocates reactive power output of each wind turbine generator, on the premise that voltage of a control point is stable, power generation efficiency of the system is improved, the fact that reactive power which each wind turbine generator outputs or absorbs is within a permissible range of the corresponding wind turbine generator is guaranteed, and safe operation of the system is guaranteed.

Description

technical field [0001] The invention relates to a distributed wind farm reactive power optimization control method and system for reducing fan loss, and belongs to the technical field of reactive power and voltage control for wind farm grid-connected operation. Background technique [0002] With the rapid development of wind power technology and the country's high attention to renewable energy power generation, my country's wind power construction has entered a period of rapid development. As a power source, wind power is random and intermittent. As more and larger capacity wind farms are put into operation, technical problems such as wind power grid integration are becoming more and more prominent. For example: the network loss is large; when any point in the power grid fails, its disturbance will have an impact on the entire power grid, and in severe cases may cause large-scale power outages or even grid collapse; the centralized large power grid has poor adaptability to l...

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Problems solved by technology

[0005] However, these strategies obtain the reactive power requirements of the entire wind farm by distributing them to each wind turbine according to equal power factors or equal proportions as their reactive power control target reference value. This distribution method does not take into account the wind power The relationship between the reactive power generated by the unit and its own loss, so it is impossible to minimize the overall loss of the wind turbine as much as possible while meeting the voltage requirements of the grid-connected point

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