Frequency and voltage regulation method of island microgrid system based on power sensitivity analysis
A technology of sensitivity analysis and system frequency, applied in the direction of AC network voltage adjustment, reducing/preventing power oscillation, reactive power compensation, etc., can solve problems such as sea level rise, non-renewable, global energy supply tension, etc., and achieve flexible adjustment methods , Adjust the effect of a wide range
Inactive Publication Date: 2019-06-04
LIUAN POWER SUPPLY COMPANY STATE GRID ANHUI ELECTRIC POWER +1
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However, traditional fossil energy reserves are limited and non-renewable, resulting in tight global energy supply
On the other hand, the combustion of traditional fossil energy will inevitably lead to the emission of toxic and harmful gases such as sulfur dioxide and nitrogen oxides, and the large amount of carbon dioxide gas will further aggravate global warming and cause the sea level to continue to rise
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[0028] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0029] A 14-node micro-grid system structure diagram as shown in figure 1 Shown, carry out embodiment analysis to it. Node 8 in the microgrid system is connected to a diesel generator with an adjustable capacity of 3kW-60kW. Node 4 is connected to a micro gas turbine with an adjustable capacity of 5kW-80kW. Node 7 is connected to a fuel cell with an adjustable capacity of 4kW-80kW. Nodes 5 and 10 are respectively connected to photovoltaic power generation system and wind power generation system. When the external environment changes greatly, the system frequency and node voltage will deviate due to its output being greatly affected by the environment.
[0030]The flow chart of frequency and voltage regulation method of island microgrid based on node power sensitivity analysis is as follows: figure 2 As shown, first, acco...
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The invention provides an island micro-grid system frequency and voltage regulation method based on power sensitivity analysis. The method comprises the steps that according to the structure and parameters of a system, a node admittance matrix is obtained; the real-time frequency and each node voltage of the system are collected; power sensitivities are determined, wherein the power sensitivitiescomprise the sensitivity of the system to active power and reactive power and the sensitivity of each node voltage to the active power and the reactive power; the sensitivities of the node voltages tothe active power and the reactive power are sequenced in a descending order, the first one third of nodes are selected, the system frequency deviation and the minimum node voltage deviation serve asoptimization targets, optimization is conducted through an optimization algorithm, and node optimization values are obtained; the active power and the reactive power are adjusted according to the nodeoptimization values, so that the system frequency deviation and the minimum node voltage deviation are adjusted. According to the method, the frequency and voltage of the island microgrid system canbe adjusted at the same time, the adjusting range is wider, the adjusting mode is more flexible, and the adjusting process is more reasonable.
Description
technical field [0001] The invention relates to the technical field of frequency and voltage regulation during micro-grid island operation, in particular to a frequency and voltage regulation method for an island micro-grid system based on power sensitivity analysis. Background technique [0002] With the rapid development of the world economy, global fossil energy consumption has maintained a steady and rising trend. However, traditional fossil energy reserves are limited and non-renewable, resulting in tight global energy supply. On the other hand, the combustion of traditional fossil energy will inevitably lead to the emission of toxic and harmful gases such as sulfur dioxide and nitrogen oxides, and the large amount of carbon dioxide produced will further aggravate global warming and cause the sea level to continue to rise. Therefore, vigorously promoting the development and utilization of renewable clean energy is gradually becoming one of the consensus of governments ...
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IPC IPC(8): H02J3/24H02J3/12H02J3/16
CPCY02E40/30
Inventor 兰佳潘鹏宇朱晓娟伍仪曙卢庆乐李智孙晨光阮力陈娅李超文汪东吴东兵邵郁胡海涛
Owner LIUAN POWER SUPPLY COMPANY STATE GRID ANHUI ELECTRIC POWER