一种衡量发电商市场控制力的新指标

衡量各发电商的市场力与投机行为，研究市场的电价变化，是电力市场的深层次问题。在总结传统市场力理论的基础上，基于厂商所面对的需求曲线，提出了反映机组市场力的市场电价可控区的新概念，建立了从市场电价角度衡量各厂商市场力大小的指标——市场价格可控指数。在此基础上，提出了衡量市场力程度的综合指数和衡量厂商滥用市场力行为的指标。这些指标能较全面地反映市场力变化的动态信息，使得对市场控制力的监管更科学化和具有可操作性，有利于采取针对性和预知性措施以抑制市场力的垄断行为.

A NEW INDEX FOR EVALUATING GENERATOR'S MARKET POWER

Evaluating market power of each generator is an interesting topic in the deregulated environment of electricity market. By introducing a new conception of market price controllable scope (MPCS) based on the analysis of firm's demand curves, this paper designs market price controllable (MPC) index to reflect market power of each unit in terms of market energy price. Furthermore, index of market power exertion (MPE) is presented to describe the degree of practical market power abuse of units or generators. The new indices provide comprehensive dynamic information of market power variation, simplify the supervisory methods, and make the monitor and control measures of market power more efficient, measurable and preventive. This project is supported by National Key Basic Research Special Fund of China (No. G1998020311) and Fundamental Research Funds of Tsinghua University (No. JC2002018).