Coordinated control method based on GPS synchronous fixed frequency for micro-grid running in isolated island

A coordinated control and micro-grid technology, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., to achieve the effect of ensuring system stability

Active Publication Date: 2017-12-15
SHANDONG UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention proposes a GPS synchronous fixed frequency-based coordinated control method for island operation microgrids, which can solve the problem of interactive influence between frequency stability and voltage stability

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  • Coordinated control method based on GPS synchronous fixed frequency for micro-grid running in isolated island
  • Coordinated control method based on GPS synchronous fixed frequency for micro-grid running in isolated island
  • Coordinated control method based on GPS synchronous fixed frequency for micro-grid running in isolated island

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Embodiment Construction

[0049] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...

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Abstract

The invention discloses a coordinated control method based on GPS synchronous fixed frequency for a micro-grid running in an isolated island. The method solves the problem of interactive influence between frequency stability and voltage stability and comprises the steps of 1, establishing a static droop curve of an adjustable power supply according to the maximum allowable voltage, rated working voltage and a maximum current limiting point; 2, establishing a current output response controller on the basis of first-order dynamic characteristics; 3, in order to achieve the purposes of improving system damping ratio and reasonably distributing power, establishing a typical scene droop coefficient optimization query base, and conducting dynamic optimization on droop coefficients; 4, determining adjustable power supply output of a current running scene; 5, establishing a combined optimization model of active power and reactive power, and adopting a Newton method to carry out multi-target solution; 6, determining the optimal power, voltage and current output. According to the coordinated control method based on the GPS synchronous fixed frequency for the micro-grid running in the isolated island, the synchronous fixed frequency of the micro-grid, the voltage stability and optimization control of the micro-grid, the on-site voltage control and power distribution of the micro-grid, and efficient optimization running of the micro-grid are achieved.

Description

technical field [0001] The invention relates to a GPS synchronous fixed-frequency-based coordinated control method for an island-run microgrid, belonging to the field of power system control. Background technique [0002] Microgrid is an effective way to efficiently utilize distributed renewable energy, and the combination of microgrid and large power grid is the development direction of the future power system. When the large power grid fails, the microgrid operates in an island mode, which can ensure reliable power supply for users. Since the microgrid is separated from the large power grid during operation, how to effectively control the frequency and voltage to ensure the stable operation of the microgrid has become a key technical problem to be solved urgently. [0003] At present, most of the microgrid control adopts the same strategy as the large power grid, such as using master-slave control or peer-to-peer control to control the frequency and voltage separately. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06H02J3/38
CPCG06Q10/04G06Q10/06312G06Q10/067G06Q50/06H02J3/38H02J3/388Y02E40/70Y04S10/50
Inventor 彭克徐丙垠赵艳雷陈羽赵学深张聪赵曰浩
Owner SHANDONG UNIV OF TECH
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