Frequency control method for multi-energy complement power supply system

A power supply system and frequency control technology, applied in the field of control, can solve problems such as dynamic response characteristics, single machine overcurrent capability, power frequency control accuracy difference, etc.

Active Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +2
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Problems solved by technology

Droop control is a kind of differential control. When the system power fluctuates greatly, the voltage and frequency of the system will exceed the allowable operating range; the inverter-type micro-source and the synchronous motor-type micro-source are jointly networked to realize system frequency cont

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  • Frequency control method for multi-energy complement power supply system
  • Frequency control method for multi-energy complement power supply system
  • Frequency control method for multi-energy complement power supply system

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Embodiment Construction

[0070] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0071] The present invention provides a method for controlling the frequency of a multi-energy complementary power supply system. The method includes the following steps:

[0072] Step 1: Power-frequency partition control of photovoltaic grid-connected inverters;

[0073] Step 2: Power-frequency partition control of the hybrid energy storage system;

[0074] Step 3: Power-frequency partition control of the multi-energy complementary power supply system.

[0075] In the step 1, (such as figure 1 ) Let the frequency operating value, the lower limit and the upper limit of the multi-energy complementary power supply system be f and f respectively min and f max , so the power-frequency partition control of the photovoltaic grid-connected inverter is divided into the following situations:

[0076] (1) Satisfy fmin When , the photovoltaic grid-connected inverte...

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Abstract

The invention provides a frequency control method for a multi-energy complement power supply system. The method comprises the following steps: controlling the power frequency partition of a photovoltaic grid inverter; controlling the power frequency partition of a mixed energy storing system; controlling the power frequency partition of a multi-energy complement power supply system. The frequency control method for the multi-energy complement power supply system, provided by the invention, can be applied to the multi-energy complement power supply system, and can realize the purpose that a generator unit and an electric and electronic electricity generation unit are rotated synchronously to jointly control the system frequency, so that the influence of high amplitude power fluctuation on the system frequency is effectively restrained, and the power supply quality of the system is improved.

Description

technical field [0001] The invention relates to a control method, in particular to a frequency control method of a multi-energy complementary power supply system. Background technique [0002] A microgrid is a collection of distributed power sources, energy storage units, loads, and control and protection devices. It is an autonomous system capable of self-control, protection, and management. According to the connection relationship between the microgrid and the large power grid, the microgrid is divided into a networked microgrid and a multi-energy complementary power supply system. For the frequency adjustment of the networked microgrid, due to the voltage and frequency support of the large power grid, each distribution in the microgrid system The power supply, energy storage unit and load can be directly connected to the grid. The frequency of the microgrid system is directly determined by the large power grid and is relatively stable. For the frequency adjustment of the ...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/24
CPCH02J3/02H02J3/382H02J3/383H02J3/387H02J3/46Y02E10/56
Inventor 刘纯李光辉何国庆郝木凯孙艳霞冯凯辉赵伟然孙文文汪海蛟
Owner STATE GRID CORP OF CHINA
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