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Initializing method of PSCAD (power system computer aided design) customized generator controller

A generator controller and initialization method technology, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems affecting the simulation results and the deviation of generator operating state, etc., and achieve the effect of initialization

Active Publication Date: 2017-12-26
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will cause the generator operating state to deviate from the state determined by the power flow calculation, thereby affecting the simulation results

Method used

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  • Initializing method of PSCAD (power system computer aided design) customized generator controller
  • Initializing method of PSCAD (power system computer aided design) customized generator controller
  • Initializing method of PSCAD (power system computer aided design) customized generator controller

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Experimental program
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Embodiment 1

[0023] Embodiment 1: The custom controller of this embodiment is a generator excitation system

[0024] Step 1. Determine the modules that need to be initialized in the controller transfer function, such as figure 2 Shown is the AC4A transfer function of the excitation system, V S Additional control input for the excitation system, V ref is the reference input of the excitation system, E FD is the output of the excitation system, and the module that needs to be initialized includes a lead-lag link and the first-order inertial link The output of the lead-lag link is Y3_0.

[0025] Step 2. Determine the relationship between the output of the module to be initialized in the steady state and the known quantities including the input and output of the controller; ignoring the limiting link, the additional excitation input V of the controller in the steady state S = 0, then S=0 in the lead-lag link and the first-order inertia link, so the lead-lag link and the first-order ine...

Embodiment 2

[0044] Embodiment 2: The custom controller of this embodiment is a generator speed control system

[0045] Step 1. Determine the modules that need to be initialized in the controller transfer function, such as Figure 6 The transfer function of the speed control system is shown, and the modules that need to be initialized include: the first-order inertial link The initial output is Y4_0; the differential link The initial output is 0; the integration link The initial output is Y8_0; the integration link The initial output is Y16_0; the first-order inertia link The initial output is Y17_0; lead-lag link The initial output is Y18_0; the reference input Y of the speed control system ref .

[0046] Step 2. Determine the relationship between the output of the initialization module and the known quantities including the input and output of the controller in the steady state;

[0047] Ignore the dead zone and limiting link; disconnect the integral link, make the input pos...

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Abstract

The invention relates to the technical field of transient state simulation of a power system, and discloses an initializing method of a PSCAD (power system computer aided design) customized generator controller. The method includes the processes of confirming a module i to be initialized in a transfer function of a controller, a variable output Yio of the module i, and a reference input Yref0 of the controller; confirming the relationship of an output Yi0 under a stable state and known quantity including input and demand output of the controller; adding a generator variable for initialization; customizing the variables of the initial state and the normal state of the generator and the variable of the module i in the Script, and calculating the output Yi0 of the module i under the initializing state of the generator; after initializing the generator, locking the reference input of the controller. When the generator of the technical scheme is initialized to a stable state, the customized controller also reaches the stable state, thus the initialization of the customized controller is realized.

Description

technical field [0001] The invention relates to the technical field of force system transient simulation, in particular to an initialization method of a PSCAD self-defined generator controller. Background technique [0002] PSCAD-EMTDC (PSCAD for short) is one of the most widely used electromagnetic transient simulation software in the world. The software provides a rich generator control system model library, such as speed control system, excitation system, etc. However, in actual simulation, controllers that are not in the official model library will always be used, and the model needs to be customized at this time. [0003] PSCAD provides two ways to build a custom controller, one is to use the continuous system model function (Continuous System Model Functions) provided by the software to build; the other is in the custom module of PSCAD, by writing scripts (Script ) to realize the control system modeling. Compared with the first method, the model established by the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 杨毅强谭功全
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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