Micro-grid control system and device automatically adjusting aluminum electrolysis direct current load
A control system and automatic adjustment technology, applied in the field of power grid security and stability control system
Active Publication Date: 2014-01-15
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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However, the present invention aims at an operation system in which an electrolytic aluminum plant and a self-provided power plant directly supply power to form a microgrid or an isolated grid, and realizes the control of automatically adjusting the electrolytic aluminum load according to the power generation power of the power plant under the condition of a series of power outages where the electrolytic aluminum load is incomplete. system and device, the control system and device have not been reported
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[0034] Attached below figure 1 , 2 The present invention is further described.
[0035] A micro-grid control system for automatically adjusting the DC load of electrolytic aluminum. A host computer is set in the system, and the host computer sends a rectification system trigger given signal G7, and the system enters a working state; the host computer collects the data of the DC sensor 5 in real time The electrolytic DC feedback signal I8 is used to determine whether the electrolytic DC current deviates from the rated value through the electrolytic DC feedback signal I88. If there is a deviation, a thyristor given control signal V9 is output to control the rectifier unit 2. Steady current to realize stable operation of electrolytic cell 3 with constant current. If one or two of the rectifier units 2 fails and exits operation when the frequency is normal, the thyristor firing angle of other rectifier units 2 can be automatically adjusted according to the electrolytic DC feedba...
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The invention discloses a micro-grid control system and a device automatically adjusting aluminum electrolysis direct current load. A host computer is arranged in the system. The host computer transmits a rectification system triggering given signal G, such that the control system starts a working state; the host computer acquires electrolysis direct current feedback signals I of a direct current sensor in real time; the host computer determines whether the direct current is deviated from a rate value according to the electrolysis direct current feedback signals I; if the deviation exists, a controllable silicon given control signal V is outputted, such that rectifier units are subjected to controllable silicon stabilization, and electrolytic tank constant-current stable operation is realized. According to the invention, multiple rectifier units are connected in parallel; the power supply rectification system completely satisfies aluminum electrolysis process requirements; and an automatic stabilizing control system is combined with a grid system safety stabilizing control system, such that a micro-grid isolated operation purpose is realized. According to grid quality requirements, the number of the rectifier units connected in parallel can b selectively adjusted.
Description
technical field [0001] The invention relates to the technical field of power grid safety and stability control systems, in particular to a micro-grid control system and device for automatically adjusting electrolytic aluminum DC loads. Background technique [0002] Since the electrolytic aluminum smelter is a large power consumer, only one electrolytic aluminum production plant with an annual output of 400,000 tons needs about 720WM of electric energy, and the annual power consumption is about 56×10 8 kWh, so it is hoped that the electrolytic aluminum smelter will be built in a place where the price of electricity is more reasonable. However, with the rising demand for electricity, it is difficult to provide enough capacity from the grid to electrolytic aluminum smelters, and the use of aluminum and power joint ventures has become a must. This means that it is necessary to build a dedicated or "affiliated" power plant close to the electrolytic aluminum smelter to form a mic...
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IPC IPC(8): C25C3/20C25C3/16
Inventor 袁进禹蒋小铭魏春爱
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE