近年来电网工程设备材料价格趋势复杂多变，尤其是对变电工程造价影响较大的交流变压器，导致电网工程造价控制难度加大。以输入参数可得、可测、公开为原则，基于价值决定价格，价格围绕成本变动的基本原理，研究变压器价格构成，建立交流变压器成本分析模型，实现了通过输入主要原材料价格、基本财务数据等行业公开数据后，快速估算交流变压器成本，为电网企业投标靶心价格及价格预测提供科学支撑，提高变电工程概预算设备价格计列的准确性。

In recent years, equipment and material prices of power grid projects have been varied a lot, especially for AC transformers that have large influence on substation project costs, which makes the cost control of grid projects more difficult. Based on the principle that input parameters are measurable, available and open, and since price is determined by value and changed with cost, the price constitution of transformers are studied to build a cost analysis model of AC transformer. Thus it will be realized that with giving some industrial public data of main raw material prices and basic financial data, the cost of AC transformer can be estimated quickly, which can provide scientific support for the bidding bull’s-eye prices and price forecasting in power grid enterprises, as well as improve the accuracy of equipment price estimation in substation project budget.