PSS (power system stabilizer) parameter dynamic coordination method and device based on chaotic optimization

A technology of dynamic coordination and chaos optimization, applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as unsatisfactory damping effect, achieve clear division, improve stable operation, and be easy to implement

Inactive Publication Date: 2013-07-24
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] At present, the PSS parameter setting is based on the off-line setting of the specific operation mode. When the unit has low-frequency oscillation, the PSS parameters set in advance are not ideal for the damping effect. It is necessary to adopt a set of parameters to adapt to various oscillation modes under different operation modes. impossible

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  • PSS (power system stabilizer) parameter dynamic coordination method and device based on chaotic optimization
  • PSS (power system stabilizer) parameter dynamic coordination method and device based on chaotic optimization
  • PSS (power system stabilizer) parameter dynamic coordination method and device based on chaotic optimization

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Embodiment Construction

[0036] The solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] A dynamic coordination method for multi-machine PSS parameters based on chaos optimization, including the following steps:

[0038] (1) Read the data in the energy management system, including: system operation mode, power flow data, generator model parameters, generator speed difference Δω, electromagnetic power deviation ΔP and frequency deviation;

[0039] (2) Divide the PSS in each generator in the system into n layers;

[0040] Specifically: ① set the level n according to the output range of the generator; ② set the level n according to the region; ③ users can flexibly customize n levels according to the actual operating conditions;

[0041] (3) Construct multi-objective hierarchical optimization equation: F max (x)=(F 1 (x),F 2 (x),...F n (x)), where n is the number of layers set in step (2);

[0042] (4) Establish the chaotic varia...

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Abstract

The invention relates to a PSS (power system stabilizer) parameter dynamic coordination method and device based on chaotic optimization. The device comprises the following steps of: (1) reading data in an energy management system; (2) dividing a PSS in each generator of the system into n layers according to weight; (3) constructing a multi-object layered optimization equation; (4) establishing a mapping relation between a chaos variable quantity Tk and an optimization variable xk; (5) carrying out iterative search on the xk, solving the layered optimization equation so as to obtain the optimal value of the Fk(xk) and the xk corresponding the optimal value; (6) constructing a sub objective function equation in each layer, and solving Yk and the optimal value of the Fk(yk); and (7) firstly judging the type of the PSS in the optimal object equation according to a condition. The method provided by the invention has the beneficial effects that the method can effectively and dynamically adjust a PSS parameter of each generator, so as to restrain the low frequency oscillation of the system and improve the stability in operation of a power grid; and the division of a device module based on the method is distinct, the structure is simple, and the method is easy to implement.

Description

technical field [0001] The patent of the invention belongs to the field of smart grid automation, and specifically relates to a method and device for dynamic coordination control of multi-machine power system stabilizer parameters based on chaos optimization algorithm. Background technique [0002] With the emergence of large-capacity generator sets, fast excitation systems, high-voltage, long-distance power transmission systems and large-scale power interconnection systems, the stability of power systems has become a key indicator for evaluating system performance. For the long-distance power transmission system, maintaining its stability means that when the generator set at the transmission end of the system emits a large power, after the system suffers a small disturbance, the synchronization between the generator set and the receiving end system will not be lost; or After suffering a large disturbance impact due to system failure, the generator set at the delivery end wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 张伟冯彦刘玉娟陈立周琰周鼎
Owner NANJING UNIV OF INFORMATION SCI & TECH
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