Load balancing method, load balancing device and electricity driver

Abstract

The invention provides a load balancing method. The method comprises the following steps: step one, acquiring a current value and a voltage value at each of a power source end and a load end; step two, computing the corresponding active factor, inactive factor, power factor and load rate according to the current value and the voltage value; step three, controlling a static var compensator to perform the current compensation according to the power factor; step four, computing the optimal output power through an optimal control algorithm according to the active factor, the inactive factor, the power factor and the load rate; step five, controlling a voltage regulator to output the optimal output power; step six, repeating the steps one to five. The invention further provides a load balancing device and an electricity driver. Through the adoption of the method provided by the invention, the input power of a motor can be dynamically adjusted, the capacity of a transformer is reduced, the required input power of the motor can be automatically matched, the circuit loss is reduced, and the high power factor and the obvious energy-saving effect are realized.

Description

technical field

[0001] The invention relates to power system accessories, and more specifically, to a load balancing method, a load balancing device and a driver. Background technique

[0002] AC asynchronous motors have been widely used in industry, agriculture and other fields due to their simple structure and low price. At present, the annual power consumption of AC asynchronous motors in my country accounts for more than 80% of industrial power consumption.

[0003] AC asynchronous motor is a multi-parameter, strongly coupled and severely nonlinear controlled object. Its accurate mathematical model is difficult to obtain, and it is also affected by factors such as operating temperature and aging. Therefore, in actual work, most AC asynchronous motors The load is often in a changing state. The design of AC asynchronous motors is based on the principle of optimal efficiency under rated conditions, but uneconomical operation under light load or no-load conditions will res...

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