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A configuration method for primary frequency regulation rotating reserve capacity considering the overload capacity of hydropower

A technology of spinning reserve capacity and overload capacity, applied to circuit devices, AC networks with the same frequency from different sources, electrical components, etc., can solve the problem of low frequency stability, improve stability, and reduce spinning reserve configuration The effect of capacity

Active Publication Date: 2019-11-29
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the frequency stability of this method is still not high

Method used

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  • A configuration method for primary frequency regulation rotating reserve capacity considering the overload capacity of hydropower

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Embodiment 1

[0034] A method for configuring primary frequency regulation rotating reserve capacity considering the overload capacity of hydropower, comprising the following steps:

[0035] A. Determine the hydroelectric units participating in a frequency regulation, and obtain the water head and flow information of each hydroelectric unit;

[0036] B. Calculate the output of each hydroelectric unit according to the water head and flow information;

[0037] C. Judging the overload capacity coefficient of each hydroelectric unit according to the output of the hydroelectric unit and its own rated power;

[0038] D. According to the overload capacity coefficient, revise the parameter P of the limiting link of the speed control system of each generator MAX ;

[0039] E. According to the parameter P of the limiting link of the generator speed control system MAX , in the off-line simulation link, the spinning reserve capacity is determined according to the minimum number of spinning units or ...

Embodiment 2

[0041] Based on the method idea of ​​Embodiment 1, this embodiment discloses a specific embodiment.

[0042] Taking the offline simulation analysis of a company's actual power system as an example, it is required that the system does not trigger low-frequency load shedding when the system suddenly loses 2600MW power, that is, the maximum transient frequency deviation of the system does not exceed 1Hz.

[0043] A. Determine the hydroelectric units participating in a frequency modulation, and obtain the water head H of each hydroelectric unit i , flow Q i information;

[0044] B. According to the water head H i , flow Q i Information to calculate the output P of each hydroelectric unit i ,

[0045] Specifically, P i =9.81Q i h i n i , wherein, i=1, 2, 3, ..., n, n is the number of hydroelectric units participating in a frequency regulation; H i is the water head of the i-th hydroelectric unit; Q i is the flow rate of the i-th hydroelectric unit; η i is the efficiency...

Embodiment 3

[0057] In this embodiment, on the basis of the above embodiments, the determination method of the overload capacity coefficient of the hydroelectric unit is refined:

[0058] like Then the unit has k i double overload capacity,

[0059] like Then the unit has k i times overload capacity, that is

[0060] like Then the unit does not have overload capacity, that is, k i =0.

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Abstract

The invention discloses a primary frequency modulation spinning reserve capacity collocation method considering hydroelectric overload capacity. The collocation method comprises the following steps of A, obtaining water head and flow information of each hydroelectric generating set; B, calculating output of each hydroelectric generating set according to the water head and flow information; C, judging the overload capacity coefficient of each hydroelectric generating set according to the output and the self rated power of the hydroelectric generating set; D, correcting the amplitude-limiting link parameter P<MAX> of each generator speed regulation system according to the overload capacity coefficients; and E, determining the spinning reserve capacity in an off-line simulation link according to the minimum of spinning reserve set number or the minimum of spinning reserve total capacity based on the amplitude-limiting link parameter P<MAX> of the generator speed regulation system. By adoption of the method, frequency stability can be greatly improved, and the spinning reserve collocation capacity can be dramatically reduced.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method for configuring a primary frequency modulation rotating reserve capacity considering the overload capacity of hydropower. Background technique [0002] Frequency is one of the main parameters for power system monitoring and analysis, and keeping frequency within the qualified range is an important task for power system operation. When the system frequency changes greatly, it will bring obvious adverse effects to the power system, and even lead to frequency stability damage accidents. For small systems or isolated grids, frequency stability is even more important than power angle stability and voltage stability. [0003] As the last line of defense among the three lines of defense to ensure the safe and stable operation of the power grid, low-frequency load shedding is an emergency control measure to prevent frequency collapse of the power system. When arranging the operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/24H02J3/06
CPCH02J3/00H02J3/06H02J3/24H02J2203/20
Inventor 陈刚丁理杰史华勃王曦周波张华李鑫王亮汤凡张宇栋李甘
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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