Energy coordinated optimization method for multi-element complementary new energy power generating system

A power generation system and energy coordination technology, applied in wind power generation, energy storage, electrical components, etc., can solve the problems of high cost, photovoltaic power generation energy conversion efficiency and low power density, etc.

Active Publication Date: 2015-03-11
STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST
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Problems solved by technology

However, compared with wind power generation, the energy conversion efficiency and power density of photovoltaic power generation are lower, and the c

Method used

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  • Energy coordinated optimization method for multi-element complementary new energy power generating system
  • Energy coordinated optimization method for multi-element complementary new energy power generating system
  • Energy coordinated optimization method for multi-element complementary new energy power generating system

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Embodiment Construction

[0068] The embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0069] Use MATLAB / Simulink software to build a multivariate complementary power generation system model, including wind turbines, micro gas turbines, batteries, supercapacitors and loads. The traditional strategy of fixed filter time constant and the power energy coordination optimization method of multivariate complementary power generation system are used to carry out simulation experiments respectively, and the coordinated control of each power generation unit is carried out to compare the effects of the two strategies. The initial low-pass filter time constant T is set to 5. The simulation time is set to 100s, the load power changes from 3MW to 2MW in 50s, the initial state of charge of the battery and supercapacitor is 0.5,...

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Abstract

The invention discloses an energy coordinated optimization method for a multi-element complementary new energy power generating system. According to the method, through coordination control to a micro gas turbine, an accumulator and a supercapacitor, the system power fluctuation is stabilized, and the system power balance is ensured; the output power of the micro gas turbine is used for compensating power vacancy and stabilizing low frequency band power fluctuation, so that the configuration capacity of an energy storing device is reduced. As the wind power generation output power is high in fluctuation and comprises high-frequency components and low-frequency components, excepting for depending on the micro gas turbine to compensate the system power balance, the energy type energy storing device accumulator and the power type energy storing device supercapacitor can be utilized to ensure the accuracy and the quickness of power stabilization. A time constant T of a filter can be tracked and adjusted in real time to allow the vacancy power to be reasonably distributed between the energy storing devices, so that the charging state out-of-limit probability of the energy storing devices is reduced, the advantages of different energy storing devices are fully used, and the requirement on the system power balance is met.

Description

technical field [0001] The invention relates to an energy coordination and optimization method for a multiple complementary new energy power generation system, which belongs to the technical field of new energy. Background technique [0002] With the increasingly serious environmental problems and energy crisis, the traditional power system consumes fossil fuels to generate electric energy and long-distance transmission has been difficult to meet the requirements of energy saving, emission reduction, environmental pollution reduction, network loss reduction, power quality improvement and power supply reliability. Countries around the world are vigorously developing new energy and renewable energy and promoting the development of new smart grid technologies to increase the proportion of renewable energy power generation and meet users' higher requirements for power quality and power supply reliability. Therefore, a multi-component complementary power generation system consist...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCH02J3/24H02J3/32H02J3/381H02J3/386Y02E10/76Y02E70/30
Inventor 刘永亭
Owner STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST
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