高产高效工作面供电电压等级的选择

SELECTIONOF VOLTAGE CLASS ON HIGH PRODUCTION HIGH EFFICIENCY COAL FACE

国外高产高效工作面供电技术发展上的一个重要特征就是中压2.3至5kv直接引入了采煤工作面。这是由于机械功率不断增大(2×500kW),采区不断扩大(工作面250～300m、走向～2500m)的必然结果。我国发展高产高效工作面可供选择的电压等级不外乎3 kV或6kV。本文作了简单的计算分析,认为我国6kV矿用电气设备的技术水平不高,可靠性较差,用于动态的用电系统较难适应。所以从制造、维护、安全、投资、借鉴等综合考虑,我国高产高效工作面采用3kV供电较为现实合理。

An importan feature n developing power supply technique on high production high efficiency coal face in foreign countries is to draw medium voltage (2.3kV-5kV) directly into coal face. It is inevitably resulted from unceasing increase of machine power (2X500kW) and continuous enlargement of mining area (face at 250m-300m, strike at 2500m approx.). The selectable voltage class to be developed in our country on the same kind coal face is no more than 3kV and 6kV. The paper analyses these two classes through computation, deems that the reliability of the manufacture of 6kV mining equipment in our country is not satisfactory at present, it is unadaptable in the electric system of dynamic state. Therefore, as viewed from manufacture, maintenance, safety and investment, to take the voltage class of 3kV is more realizable and reasonable.