Static synchronous generato
A technology for synchronous generators and virtual generators, which is applied to the control of generators, generator control components, and control of generators through magnetic field changes, and can solve the problems of not describing the practical details of controlling electrostatic synchronous generator systems
Active Publication Date: 2011-11-23
RAMOT AT TEL AVIV UNIV LTD
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Problems solved by technology
Neither paper describes the practical details of the systems needed to control an electrostatic synchronous generator, and problems remain in that area
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[0028] The rest of the description is organized as follows. In Part I, the dynamic model of the synchronous generator is established without making assumptions about the signal. Although the SG model has been fully described in the literature, the way this article describes the model is relatively new. Then, in Part II, how to implement an inverter to simulate a synchronous generator is described, and in Part III, a system for controlling SSG embodying the present invention is described, which includes frequency and voltage reduction for load balancing Mechanism, and then simulation results are given in Part IV.
[0029] I. Modeling the synchronous generator
[0030] This embodiment of the invention is based on a mathematical model of a synchronous generator, which is considered a dynamic system without hypothetical signals. consider figure 1 The generator configuration 10 shown is a full-circle rotor machine (without damper windings) with p pairs of electrodes per phase and no ...
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The invention is concerned with a device and a method for controlling an inverter associated with a power source, which typically will be a distributed power source. The role of an inverter is to modulate the electrical power output, e.g. to provide a three phase AC electrical output at suitable voltage, where the output is to be supplied to a conventional power distribution, grid. The invention involves modelling the behaviour of a synchronous electrical generator. Variables represent the angular position and rotational speed of the virtual rotor (14) of this virtual synchronous generator. The torque electromagnetically exerted on the rotor is calculated from a measured inverter output current, and from a variable representing excitation current in the rotor.; Allowing for this and for a notional drive torque applied to the virtual rotor (which in the physical analogue would be supplied by some prime mover such as an engine), as well as for the virtual inertia of the rotor, the angular speed of the virtual rotor is calculated, Using the angular position and rotational speed of the virtual rotor, and allowing for the aforementioned excitation current, it is possible to obtain the cmf induced in stators of the virtual generator. On this basis a control signal is generated which causes the inverter to produce an AC output corresponding to that which would be provided by the virtual synchronous generator. A synchronous generator must be regulated, as too must the virtual synchronous generator of the present invention.; To this end, the invention provides a feedback loop in which deviation of the rotational speed of the virtual generator rotor from a reference angular speed is detected and is used to adjust the virtual drive torque, thereby to regulate the rotational speed of the rotor and hence the frequency of the AC output and the real power supplied by it.
Description
Technical field [0001] The invention relates to a control device for an inverter associated with a power source. Specifically, the control device makes the power supply and the inverter together mimic the operating state of the synchronous generator in some respects. Background technique [0002] Due to economic, technological, and environmental reasons, more and more distributed energy sources will play an important role in the future power supply. Among them, distributed energy sources are, for example, combined heat and power (CHP) stations and such as wind, solar, wave power And tidal energy and other renewable energy sources. The EU has set a target of reaching 22% of renewable energy in power generation and 18% of CHP by 2010. At present, the power system is undergoing a huge transformation from centralized power generation to distributed power generation. Most of these distributed / renewable generators produce variable frequency AC sources, high frequency AC or DC source...
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IPC IPC(8): H02P9/02H02P9/14H02P9/30
CPCH02P9/30H02P23/14H02P23/12H02P9/02H02P2009/004H02P9/14H02P2101/15
Inventor 乔治·魏斯庆昌·钟
Owner RAMOT AT TEL AVIV UNIV LTD