An online reactive power optimization control method based on real-time simulation system
A real-time simulation and optimization control technology, applied in general control systems, control/regulation systems, instruments, etc.
Inactive Publication Date: 2015-09-30
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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At present, scholars at home and abroad have a lot of research results on reactive power optimization models and algorithms, but the experimental test research on online reactive power optimization control is still relatively rare. This invention proposes an online reactive power optimization control method based on a real-time simulation system. This method provides a method for the experimental test of reactive power optimization control in the field
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[0031] A reactive voltage optimal control method is described as follows:
[0032] Firstly, the objective function: choose the minimum active network loss of the system as the objective:
[0033]
[0034] In the formula, A collection of generator nodes; Active output power for generator i; set for all nodes; is the active load at node i.
[0035] Equality Constraints: Power Flow Equation:
[0036]
[0037] In the formula, is the reactive power output at node i; for the system Reactive load at the node; is the voltage amplitude and phase angle of node i of the system; V j ,θ j is the voltage amplitude and phase angle of node j of the system; are the amplitudes and phase angles of the elements in the nodal admittance matrix.
[0038] Inequality constraints:
[0039] 1. Adjustable transformer tap constraints:
[0040] In the formula, for the node with between the adjustable transformer taps corresponding to the transformer ratio, is a set ...
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The invention relates to an on-line reactive power optimization control method based on a real-time simulation system. The real-time simulation system is utilized to construct a real-time grid simulation model; a program is written in the batch script file of the real-time simulation system, and running data are extracted from a running interface and outputted; a reactive power optimization program package reads needed data, executes optimizing computation, and outputs a computation result, the scripting language of the real-time simulation system is used for programming to set the position of a transformer tap and the switching of a capacitor-reactor bank, and finally, the setting is transmitted back into the real-time simulation system; the real-time simulation system is utilized to receive and execute the setting transmitted back by the reactive power optimization program package in batch, corresponding action is conducted on the running interface, and thereby the on-line reactive power optimization model and the control effect of the algorithm are tested. The invention provides the reactive power optimization control method on a test site with a laboratory testing tool.
Description
technical field [0001] The invention relates to an online reactive power optimization control method based on a real-time simulation system. Background technique [0002] Over the past ten years, voltage problems have increasingly become the focus of attention in power systems. In the modern power grid, due to the heavier load of the weak system and long lines, the transmission capacity of the power grid is getting closer and closer to its limit, so that the problem of voltage stability is more prominent, and the load increase, generator or line failure, system reactive power shortage , on-load tap changer action and lack of coordination between various controls and protections, etc., and the lack of sufficient reactive power support for the load is the main cause of voltage instability. At present, scholars at home and abroad have a lot of research results on reactive power optimization models and algorithms, but the experimental test research on online reactive power opti...
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IPC IPC(8): G05B17/02
Inventor 范宏阳育德唐永红徐琳丁会凯
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER