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Controller parameter setting method applied to high-voltage direct-current power transmission, medium and equipment

A technology of high-voltage direct current transmission and high-voltage direct current, which can be applied in power transmission AC network, reducing/preventing power oscillation, etc., and can solve problems such as large amount of calculation and low efficiency.

Active Publication Date: 2020-06-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In short, the existing controller parameter tuning method for HVDC projects is inefficient and requires a large amount of calculation, so it is necessary to develop an efficient, reliable controller parameter tuning method suitable for actual HVDC projects

Method used

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  • Controller parameter setting method applied to high-voltage direct-current power transmission, medium and equipment
  • Controller parameter setting method applied to high-voltage direct-current power transmission, medium and equipment
  • Controller parameter setting method applied to high-voltage direct-current power transmission, medium and equipment

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Embodiment 1

[0109] This embodiment discloses a controller parameter tuning method applied to HVDC transmission, such as figure 1 As shown, the steps are as follows:

[0110] S1. Obtain network parameters and controller parameters of the HVDC power transmission system. Among them, the rectifier side of the HVDC power transmission system adopts constant current control, the inverter side adopts constant voltage control or predictive constant turn-off angle control, and the phase-locked loop adopts synchronous rotating coordinate phase-locked loop.

[0111] The controller parameters include: the proportional coefficient K of the constant current controller PIdc and integral coefficient K iIdc , The proportional coefficient K of the phase-locked loop on the rectifier side pPLL1 and integral coefficient K iPLL1 , The proportional coefficient K of the phase-locked loop on the inverter side pPLL2 and integral coefficient K iPLL2 , The proportional coefficient K of the constant voltage cont...

Embodiment 2

[0208] This embodiment discloses a storage medium, which stores a program. When the program is executed by a processor, the controller parameter setting method for high-voltage direct current transmission described in Embodiment 1 is implemented, specifically as follows:

[0209] S1. Obtain network parameters and controller parameters of the HVDC transmission system;

[0210] S2. Subdividing the HVDC transmission system into sub-modules, and then describing each sub-module with differential equations and algebraic equations based on network parameters and controller parameters, to obtain a state space model of the HVDC transmission system;

[0211] S3. At the equilibrium point of the state space model, the state space model is linearized to obtain the state space matrix A and the input matrix B and the small disturbance dynamic model of the HVDC transmission system;

[0212] S4. Determine the research range and change step size of each controller parameter, and calculate the e...

Embodiment 3

[0218] This embodiment discloses a computing device, including a processor and a memory for storing executable programs of the processor. When the processor executes the program stored in the memory, the control applied to high-voltage direct current transmission as described in Embodiment 1 is realized. The tuning method of the device parameters is as follows:

[0219] S1. Obtain network parameters and controller parameters of the HVDC transmission system;

[0220] S2. Subdividing the HVDC transmission system into sub-modules, and then describing each sub-module with differential equations and algebraic equations based on network parameters and controller parameters, to obtain a state space model of the HVDC transmission system;

[0221] S3. At the equilibrium point of the state space model, the state space model is linearized to obtain the state space matrix A and the input matrix B and the small disturbance dynamic model of the HVDC transmission system;

[0222] S4. Determ...

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Abstract

The invention discloses a controller parameter setting method applied to high-voltage direct-current power transmission, a medium and equipment. The method comprises the following steps: firstly, acquiring network parameters and controller parameters of a high-voltage direct-current power transmission system; subdividing the system into sub-modules and describing the sub-modules by using a differential equation and an algebraic equation to obtain a state space model; linearizing the state space model to obtain a state space matrix A, an input matrix B and a small interference dynamic model; calculating characteristic values of the matrix A under different parameter values; screening the characteristic values, and determining a stability domain of the controller parameters; converting the small-interference dynamic model into a transfer function model, calculating a transfer function of a constant current controller or a constant voltage controller, and obtaining a unit step response ofthe transfer function; and calculating a dynamic time domain index according to the unit step response curve, and obtaining an optimal controller parameter according to an ITAE criterion. The methodcan effectively improve the operation characteristics of the high-voltage direct-current power transmission system, and improves the small-interference stability of the system.

Description

technical field [0001] The invention relates to the technical field of small-disturbance stability analysis of an AC-DC power transmission system, in particular to a controller parameter setting method, medium and equipment applied to high-voltage DC power transmission. Background technique [0002] Grid commutation converter HVDC transmission has many advantages such as long transmission distance, large capacity, low loss, and mature technology, and plays an important role in realizing the optimal allocation of cross-regional power resources. However, with the continuous investment in DC transmission projects, the transmission capacity continues to increase, and the strength of the AC system on the inverter side decreases. Divergence or low frequency oscillation and many other problems. Reasonable selection of controller parameters can effectively improve the operating characteristics of HVDC transmission system and improve the small disturbance stability of the system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/24
CPCH02J3/24H02J3/36Y02E60/60
Inventor 汪娟娟陈威叶运铭龚英明文兆新吴秋媚
Owner SOUTH CHINA UNIV OF TECH
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