输电电价定价方法的研究

Proposed Wheeling Charge Method for Transmission Network

文章主要提出了改进的输电线路输电费定价方法,并在2个小系统上进行测试。该改进法可以克服现存MW- km(兆瓦公里法)忽视交易类型和位置的缺陷,弥补在输电线路服务成本回收上的不足。在此改进法上引进利益分享因子r,能够在处理逆向电力潮流交易时让电网用户和所有者合理分享利益。这改进的定价法在5节点系统,和IEEE-14节点系统上进行测试,并且与以前绝对值法,净值法和正向潮流法比较。在5节点系统上,证明了此改进方法在单一交易时的有效性;另一方面,在IEEE-14节点系统上,改进的方法用来测试多个交易同时发生时的可行性。最后可以得出,使用此改进的输电线路输电费定价法后,能够鼓励在产生逆向潮流的位置上建设发电厂,而且还能减缓输电线路的阻塞,让输电线路所有者可以延缓网络线路容量的扩张,对系统大有裨益。

Transmission business presents monopolistic charaeteristics, therefore not only to charge the users for the use of transmission facilities in the fair way and at the same time allowing the transmission utilities to recover their transmission cost. Several methodologies have been developed so far to recover the cost transmission services. This research focuses on the mathematical formulation and ease studies of the proposed wheeling charge method for transmission network, which successfully overcomes the shortcomings of existing MW-km approaches in the context of revenue reconciliation of transmission services regardless of transaetion arrangements and locations. The introduetion of a profit sharing factor r, provides an intuitive way in allocating the charge for the counter flow lines, which could benefit both patties in the trading. The proposed charging methodology has been tested on two bus systems, the 5 bus system and IEEE-14 bus system, In the 5 bus system, to investigate the capability of the proposed approach in generating the wheeling charges for single transaction. On the other hand, in the IEEE-14 bus system, the proposed approach was tested to allocate the wheeling charges for simultaneous transaction. In conclusion the use of this approach could encourage the generators to be built at the place that can create counter flow and this could mitigate the congested state of transmission lines. As a result, the transmission owner could delay further investment for upgrading transmission capacity.