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Active power decoupling control method and system based on hydro-thermal power coordination

A technology of active power and decoupling control, applied in the field of automatic power generation control of power systems, can solve problems such as lack of research and practice, and achieve the effect of improving control efficiency, control efficiency and economy

Pending Publication Date: 2021-11-12
NARI TECH CO LTD +5
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, the existing coordinated control strategies for hydropower and thermal power mainly focus on the combination of power generation planning and AGC, and there is a lack of research and practice in the AGC adjustment stage, especially how to effectively correct the adjustment amount under the grid structure that considers the characteristics of large-scale hydropower transmission. To achieve the purpose of ensuring the safe and stable operation of important hydropower sections

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Embodiment 1

[0063] The invention discloses an active power decoupling control method based on coordination of water, thermal power and electricity, which includes the following steps:

[0064] Step 1: Obtain the provincial power grid frequency and external tie-line power operation data, and calculate the active power control requirements of the provincial power grid under the tie-line frequency bias control (TBC) mode, that is, the area control bias (area control bias) error, ACE) is calculated as follows:

[0065] E. ACE =-10B(f a -f s )+(P a -P s ) (1)

[0066] In the formula, E ACE is the provincial power grid ACE; B is the frequency deviation coefficient of the control area; f a is the actual frequency of the grid; f s It is the planned frequency of the power grid, generally 50Hz; P a is the sum of the actual power flow of the external tie line in the control area; P s It is the total planned value of the external connection line in the control area.

[0067] Step 2: Establ...

Embodiment 2

[0101]This embodiment discloses an active power decoupling control system based on water-fired power coordination, including:

[0102] Regional control deviation calculation module: obtain grid frequency and external tie-line power operation data, and calculate regional control deviation ACE under tie-line frequency deviation control mode;

[0103] Modeling module: establish the active power control models of thermal power units and hydropower units respectively;

[0104] Control group division module: divide all hydropower units and all thermal power units in the power grid into thermal power control groups and hydropower control groups respectively according to the power generation type;

[0105] Decoupling control module: use the low-pass filter algorithm to decouple ACE into two active power control signals, and the two control signals are respectively distributed to the hydropower control group and thermal power control group, and then correspondingly combine the active p...

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Abstract

The invention discloses an active power decoupling control method and system based on hydro-thermal power coordination, and the method comprises the following steps: obtaining the frequency of a power grid and the power operation data of an external tie line, and calculating the area control error ACE of the power grid in a tie line frequency deviation control mode; respectively establishing active power control models of thermal power generating units and hydroelectric generating units; respectively dividing all hydroelectric generating units and all thermal power generating units in the power grid into a thermal power control group and a hydroelectric control group according to power generation types; decoupling ACE into two active power control signals by using a low-pass filtering algorithm, respectively distributing the two control signals to a hydroelectric control group and a thermal power control group, and then executing automatic generation control (AGC) normal control by respectively and correspondingly combining a hydroelectric generating set active power control model and a thermal power generating set active power control model; when the hydroelectric generating set sending-out transmission section set in the power grid is overloaded or overloaded, carrying out active power control of the hydroelectric generating set such that the control efficiency of the hydroelectric generating set is improved, and therefore the dynamic control quality of the hydroelectric generating set is improved.

Description

technical field [0001] The invention relates to an active power decoupling control method and system based on water-fired power coordination, and belongs to the technical field of automatic power generation control of electric power systems. Background technique [0002] The distribution of energy resources and consumption in China is unbalanced. The southwest region is a concentrated area of ​​hydropower resources. The total amount of clean energy technology that can be developed has reached 1 billion kilowatts, showing the situation of large-scale transmission of hydropower distribution ring networks. At the same time, due to the abundant coal resources and the large proportion of thermal power in China's power grid, there is a phenomenon of coexistence of water and fire. The regulation performance of thermal power units and hydropower units is very different, and it is urgent to realize complementary coordinated control of the two. [0003] Existing researches focus on co...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46
Inventor 谈超滕贤亮李勇王民昆常晓青罗卫华张小白兰强何笠庞涛刘爱梅胡帆刘佳名吴继平徐瑞于昌海刘俊伟
Owner NARI TECH CO LTD
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