A dispatchable distributed energy system network construction control method
A distributed energy and control method technology, which is applied in the field of dispatchable distributed energy system network construction control, can solve problems such as unfavorable system frequency, and achieve the effects of broad market prospects, fast response to suppress system disturbance, and favorable system frequency
Active Publication Date: 2022-07-12
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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[0003] However, the fixed droop factor method adopted by the traditional droop control method has different frequencies under different output power conditions, which is not conducive to the stability of the system frequency.
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[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0038] like image 3 As shown, the dispatchable distributed energy system of the present invention includes a power generation unit and an energy storage unit, the power generation unit is connected in parallel with the energy storage unit, and is connected to the power grid through a voltage-source converter (VSC). The present invention takes a grid-connected system in which the power generation u...
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The present invention provides a control method for grid construction of a dispatchable distributed energy system. On the basis of conventional droop control based on active power-frequency, reactive power-voltage droop, an adaptive droop factor is proposed, which can be adjusted according to the active power output. The command value changes, and on this basis, the power adjustment value is corrected and the EMAP filter is designed, which is beneficial to the stability of the system frequency. Compared with the traditional droop control method, the invention has the ability to keep the frequency constant under different output powers, and makes up for the defects of the conventional droop control. It provides important support for the development of distributed energy grid-connected systems and has broad market prospects.
Description
technical field [0001] The invention belongs to the field of electric power, and in particular relates to a control method for grid construction of a dispatchable distributed energy system. Background technique [0002] Renewable energy power generation technologies such as photovoltaic power generation have developed rapidly in the past ten years. Droop control is one of the most extensive control methods for new energy grid-connected systems. It simulates the active power-frequency, reactive power of traditional synchronous generators. - Voltage droop characteristics. In the typical structure of the existing distributed energy system, the power generation unit and the energy storage unit are connected in parallel, and connected to the power grid through a voltage-source converter (VSC). like Figure 1-2 shown, K f and K V are the fixed droop factors of the active power-frequency and reactive power-voltage droop curves, respectively, so the distributed energy system ca...
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IPC IPC(8): H02J3/48H02J3/50H02J3/24H02J3/16H02J3/28H02J3/32
CPCH02J3/381H02J3/466H02J3/48H02J3/50H02J3/241H02J3/16H02J3/28H02J3/32H02J2300/24H02J2300/26H02J2203/20Y02E70/30
Inventor 邓卫滕玉婷裴玮李毅丰张学
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI