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Virtual synchronous motor control method for simulation of diesel generating set

A technology of virtual synchronous motor and diesel generator set, which is applied in the field of electric power, can solve the problems of inability to reflect the characteristics of diesel generator set, increase the cost and complexity of the system, and adversely affect the stable operation of the system, so as to improve the capacity and stability and improve the dynamic response. , the effect of reducing the amount of calculation

Active Publication Date: 2019-02-01
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

However, due to the simplification of the actuator and the inertial generator into a first-order inertial link, it cannot reflect the real characteristics of the diesel generator set
The control algorithm used in the scheme is also relatively complex, requiring additional phase-locked loop calculations, introducing a nonlinear link, and the electromagnetic equation contains a differential link, which is likely to cause system oscillation in practical applications, which is not conducive to the stable operation of the system
In addition, the phase-locked loop and double-loop control used in the algorithm have a large amount of calculation, which has high requirements on the computing power of the processor, which increases the cost and complexity of the system

Method used

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  • Virtual synchronous motor control method for simulation of diesel generating set
  • Virtual synchronous motor control method for simulation of diesel generating set

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Embodiment Construction

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.

[0039] The embodiment of the invention discloses a virtual synchronous motor control method simulating a diesel generator set, such as figure 1 As shown, including the following steps:

[0040] Step S1: Frequency droop adjustment step: Simulate the droop characteristics of the diesel engine electronic governor, and output the angular velocity reference value ω in real time according to the diesel engine power f ;

[0041] Optionally, in the frequency droop adjustment step, the formula ω f =ω n -P m D p Calculate the angular velocity reference value ω f ; Where ω n Is the angular velocity rated value, P m To simulate the output power of the diesel engine, D p Is the s...

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Abstract

The present invention relates to a virtual synchronous motor control method for simulation of a diesel generating set, belonging to the technical field of electric power. The method comprises the steps of: performing simulation of the frequency droop characteristics and shafting rotation characteristics of a real diesel generating set to output simulated shafting angular speed and angle; performing simulation of the voltage droop characteristics of the diesel generating set to output a simulated exciting voltage; inputting the shafting angular speed and angle, the exciting voltage and the collected simulated motor output current into a motor equation to calculate and obtain the electromotive force of the synchronous motor; taking the electromotive force as a switch tube of a modulating wave drive inverter for power supply. A traditional virtual synchronous motor control method is improved to allow the control method to be simple, stable and reliable.

Description

Technical field [0001] The invention relates to the field of electric power technology, in particular to a virtual synchronous motor control method that simulates a diesel generator set. Background technique [0002] A virtual synchronous motor refers to a control method that uses an appropriate method to control the inverter to make its external characteristics approximate or partially approximate the frequency and voltage characteristics of a synchronous generator, thereby improving the grid-connected characteristics of the inverter. [0003] The traditional virtual synchronous motor is usually used in wind power inverters, photovoltaic power inverters and uninterruptible power supplies connected in parallel to the grid, and can effectively control the output power of the inverter. However, when the inverter is connected in parallel with the diesel generator set alone, it is often unable to adapt to the dynamic process of parallel operation. This is because the traditional virtu...

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Application Information

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IPC IPC(8): H02J3/38H02J3/24H02P9/36
CPCH02J3/24H02J3/38H02P9/36
Inventor 梁晓龙吴元元杨润宇
Owner BEIJING MECHANICAL EQUIP INST
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