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中文摘要：
分布式发电（distributed generation，DG）的应用日趋广泛，其经济效益的合理量化却难以实现。分析了DG在降低线损、减低电价、节能减排、减少发电容量以及延缓配电网建设投资等方面的经济效益。基于一般线损模型，建立了DG接入电网后对降低线损的度量模型。从市场短期运行的角度出发，以DG接入电网后的线损模型为约束条件，求解新的市场边际价格。在考虑DG接入电网后所形成的新的机组调度方案下，建立了减少污染物排放所带来的环境效益模型。算例分析结果表明，合理规划DG的接入及运行方式能给系统带来显著的经济效益。
英文摘要：
Although the application of distributed generation （DG） is increasingly extended, the reasonable quantizati0n of its economic benefit is yet difficult to be implemented. In this paper, the economic profits created by DG such as lessening line losses, reducing electricity price, energy conservation and pollutant emission reduction, reducing generating capacity and standing over the construction investment of distribution network and so on are analyzed. Based on generic line loss model, a model to assess line loss reduction due to connecting DG with power network is built. From the viewpoint of short-term operation of market and taking the line loss model after connecting DG with power network as the constraint, a new marginal price is solved. Under the new unit scheduling due to connecting DG with power network, an environmental benefit model brought by reducing pollutant emission is built. Calculation example shows that reasonable planning of connecting DG with power network and proper operation DG can bring about notable economic benefits for power system.
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