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A Synchronous Fixed-Frequency Microgrid Operation Control Method

A technology for operation control and micro-grid, which is applied in the direction of single-grid parallel feeding arrangement, electrical components, circuit devices, etc., and can solve the problems of frequency and voltage stability damage, complex control system and implementation method, and high communication system requirements.

Active Publication Date: 2020-12-15
SHANDONG UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of layered control is relatively good, which can realize the optimization and efficient operation of the microgrid, but the control system and implementation method are relatively complicated, and the requirements for the communication system are relatively high, and there is still the risk of frequency and voltage stability damage

Method used

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  • A Synchronous Fixed-Frequency Microgrid Operation Control Method
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  • A Synchronous Fixed-Frequency Microgrid Operation Control Method

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Embodiment Construction

[0036] Figure 1-8 It is the best embodiment of the present invention, below in conjunction with the attached Figure 1-8 The present invention will be further described.

[0037] Such as figure 1 As shown, a synchronous fixed-frequency microgrid operation control method includes a synchronous fixed-frequency microgrid operation control system. The synchronous fixed-frequency microgrid operation control system includes a synchronous signal unit, a current control unit, and an inverter. The synchronous signal unit outputs The synchronous time signal is sent to the current control unit, and the output terminal of the current control unit is connected to the control signal input terminal of the inverter.

[0038]Under normal circumstances, the synchronization signal unit receives the 1PPS second pulse signal sent by it through the satellite timing signal (such as GPS, Beidou, etc.), and the second pulse signal is sent to the current control unit, and the current control unit co...

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Abstract

The invention discloses an operation control method of a synchronous fixed-frequency micro-grid, which belongs to the field of power system automation. It includes a plurality of distributed power sources, the output end of the distributed power source is connected to the input end of the inverter, and the output end of the inverter is connected to the microgrid. It is characterized in that it includes the following steps: Step 1, the synchronization signal unit receives satellite timing signal; Step 2, the current control unit sends a control signal to the inverter; Step 3, the inverter outputs an AC signal; the inverter automatically adjusts the output so that the voltage amplitude output at the output terminal meets the grid requirements. In this synchronous fixed-frequency micro-grid operation control method, the pulse signal sent by the synchronous signal unit, combined with the characteristics that the inverter can generate frequency and phase independently controlled alternating current, makes all distributed power sources in the micro-grid The output is actively adjusted and controlled in the same time reference system, which overcomes the power oscillation and stability problems caused by the traditional AC grid frequency control method.

Description

technical field [0001] The invention discloses an operation control method of a synchronous fixed-frequency micro-grid, which belongs to the field of power system automation. 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. The microgrid has two operating modes: grid-connected and off-grid (island). When the large power grid fails, the microgrid operates in an island mode, which can ensure reliable power supply for users. Distributed Energy Resources (DER) in microgrids are generally connected through power electronic inverter devices, among which intermittent power sources such as photovoltaic power generation and wind power generation account for a high proportion, and are limited by investment and operation and maintenance costs. Often lacks good communication conditions, and does not have a complet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/40
CPCH02J3/382H02J3/40
Inventor 徐丙垠赵艳雷彭克张存山仉志华薛永端
Owner SHANDONG UNIV OF TECH
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