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Transient stable control method for power system with superconductive energy-stroage device

A technology of superconducting energy storage and power system, which is applied in the application of superconducting energy storage system in transient stability control of power system, and the field of transient stability control of power system, which can solve the problem of small UPS power supply capacity and inability to apply transient stability of power system. Stability control, lack of control methods, etc.

Inactive Publication Date: 2005-01-05
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

Due to the lack of a reliable control method, the UPS power supply generally has a small capacity and cannot be applied to the transient stability control of the power system.
In fact, when a transient stability problem occurs in the power system, it is often necessary to

Method used

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  • Transient stable control method for power system with superconductive energy-stroage device
  • Transient stable control method for power system with superconductive energy-stroage device
  • Transient stable control method for power system with superconductive energy-stroage device

Examples

Experimental program
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Embodiment Construction

[0054] Main circuit and PWM modulation method of superconducting energy storage system:

[0055] ●The DC side adopts superconducting energy storage coil, vacuum dewar, if the superconducting coil is made of low-temperature superconducting material, it can be cooled by liquid helium, and if it is made of high-temperature superconducting material, it can be cooled by air;

[0056] The converter generally adopts a current-type AC / DC converter;

[0057] ●In order to reduce harmonics, double-bridge parallel topology can be adopted;

[0058] ● Parallel connection with the system through a transformer;

[0059] ●The converter bridge adopts space PWM modulation.

[0060] The entire system and its linkages can be image 3 express.

[0061] The main control chip adopts TI's TSM32DSP floating-point DSP special chip, STD bus setting, using a structured design method, the controller structure is as attached Figure 4 .

[0062] The present invention proposes a new dynamic model of SM...

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Abstract

A transient stable control method for power system with superconductive energy-stroage device pertains to a transient stable control technique field based on current type inverter in a power system, characterized in that it puts forward a power system dynamic model with superconductive energy-stroage device; it obtains a robust control model of this system by leading into an external interference, then uses a linearization method and a linear H>=[infinity] control theory to restraint the external interference on the foundation that concerns the nonlinear essence in the system; and it may greatly raise transmission limit of the power system and its safety, strengthens transient stability of the systemat, and decreases the frequency instability of the power system or the accident of voltage collapse induced by a fault or other reason.

Description

technical field [0001] The invention belongs to the technical field of transient stability control of a power system, and in particular relates to the technical field of application of a superconducting energy storage system in the transient stability control of a power system. Background technique [0002] Superconducting energy storage technology is currently mainly used in UPS (uninterruptible power supply). Due to the lack of a reliable control method, the UPS power supply generally has a small capacity and cannot be applied to the transient stability control of the power system. In fact, when a transient stability problem occurs in the power system, it is often necessary to inject a large amount of active power instantaneously to make up for the insufficient supply of active power after the generator is removed. In this context, the present invention proposes a non-linear Robust control technology can effectively solve the above problems. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): H02J3/28
CPCY02E40/67Y02E40/60
Inventor 卢强梅生伟刘锋
Owner TSINGHUA UNIV
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