A parameter design method for an AC micro-grid power quality management device
A technology of parameter design and power quality, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve problems affecting the rapidity of devices, limited proportional gain, slow transient response, etc., to improve accuracy, facilitate implementation, The effect of zero tracking error
Active Publication Date: 2019-01-11
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology
However, in the PR controller, the proportional gain is limited and the gain is not 0 when the frequency is 0, which will cause the transient response to be too slow and affect the rapidity of the device
In addition, some researchers have adopted intelligent algorithms popular in recent years such as ant colony algorithm, dead beat control, H ∞ Control, fuzzy control and other strategies, these algorithms have their own advantages and disadvantages, and the structure is relatively complex, which cannot quickly and effectively solve the power quality problem and take into account its fast response and zero steady-state error characteristics
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[0066] Such as figure 1 Shown is a parameter design method for an AC microgrid power quality management device of the present invention, including the following steps: Step S01: Simulate the second-order system circuit analysis model to be controlled according to the relevant parameters of each configuration part of the power management device; Step S02: Convert the circuit analysis model of the second-order system into a circuit analysis model including internal model control design; Step S03: Convert the circuit analysis model including internal model control design into a circuit analysis model including fundamental frequency resonance term and two-degree-of-freedom controller The designed final circuit analysis model; Step S04: Transform and calculate the final circuit analysis model, and then obtain the relevant parameters of each configuration part of the power management device. The specific steps are as follows:
[0067] 1. First, model and analyze the AC microgrid pow...
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The invention relates to a parameter design method for an AC micro-grid power quality control device, comprising the following steps: step S01: simulating a second-order system circuit analysis modelto be controlled according to relevant parameters of each configuration part of the power control device; S02, converting a second-order system circuit analysis model into a circuit analysis model including an internal model control design; Step S03: Transforming the circuit analysis model including the internal model control design into the final circuit analysis model including the fundamental frequency resonance term and the two-degree-of-freedom controller design; Step S04: Convert and calculate the final circuit analysis model, and then obtain the relevant parameters of each configurationpart of the electric energy treatment device. Compared with the prior art, the invention enables the electric energy management device to quickly respond to compensate the voltage sag and the unbalanced sag of the power network, zero tracking error in the steady state, and can control the direct current offset of the measurement feedback quantity.
Description
technical field [0001] The invention relates to a parameter design method, in particular to a parameter design method for an AC microgrid power quality control device. Background technique [0002] In recent years, some changes have taken place in the structural form of the traditional power grid. With the improvement of the degree of liberalization of the power market and the maturity of distributed power generation technology, various new energy sources such as photovoltaics and wind energy have formed multiple micro-grid structures to carry out the traditional power grid. Replenish. However, there are still many problems in the operation of the microgrid. Its structure is complex, the inertia is small, the capacity is small, and the slight fluctuation of the load may cause the voltage quality problem of the AC feeder. It is necessary to install a power quality control device to stabilize the load voltage. . [0003] The key technologies of the AC microgrid power quality...
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IPC IPC(8): H02J3/00H02J3/24H02J3/26
CPCH02J3/00H02J3/24H02J3/26H02J2203/20Y02E40/50
Inventor 伦恒星房明硕王文吉曹以龙江友华
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER