A spot pricing mechanism for voltage stability
A spot pricing mechanism for voltage stability
复制标题
电压稳定的现货定价机制
DOI：
10.1016/s0142-0615(03)00023-1
复制
发表时间：
2003
影响因子：
5.2
通讯作者：
E. Read
中科院分区：
文献类型：
--
作者：
D. Chattopadhyay;B. Chakrabarti;E. Read
在当今大多数成熟的电力市场中，无功服务的支付是发电机收入的一部分。然而，考虑到动态无功功率源在维持电力系统电压稳定性方面的关键作用，这种支付没有合理的技术基础。随着市场的成熟，预计无功功率最终将在现货市场安排下进行交易。本文提出了一种无功功率的现货定价机制，考虑到发电机的贡献，提供无功功率，以满足当前的需求，也持有无功功率“储备”，以保持系统的电压稳定，在面对潜在的意外。提出了一种基于最优潮流的调度/定价模型，该模型在发电机之间优化分配真实的和动态无功备用，以满足预先给定的电压稳定裕度。节点MW和MVAr现货价格受期望的稳定裕度的影响，因为MVAr和/或MW需求的增加具有增加动态MVAr/MW备用要求的级联效应。简单的说明性的例子提出发展的理论前提的见解。减少新西兰北岛电力系统进行的实验揭示了一些有趣的影响，电压稳定性约束的真实的和无功功率价格。
Payment for reactive power services is a part of generator revenue in most established electricity markets today. However, such payments do not have a sound technical basis taking into account the critical role dynamic sources of reactive power play in maintaining voltage stability of the power system. It is also expected that the reactive power will eventually be traded under a spot market arrangement as the markets mature. This paper proposes a spot pricing mechanism for reactive power that takes into account the contributions made by generators both by providing reactive power to meet the current demand and also holding reactive power ‘reserve’ to maintain the system voltage stability in the face of a potential contingency. An OPF based dispatch/pricing model is proposed that optimally allocates real and dynamic reactive reserve among the generators to meet a pre-specified voltage stability margin. Nodal MW and MVAr spot prices are affected by the desired stability margin because an increase in MVAr and/or MW demand has the cascading effect of increasing the dynamic MVAr/MW reserve requirement. Simplistic illustrative examples are presented to develop insights on the theoretical premise. Experiments conducted for a reduced New Zealand North Island power system reveal some interesting impacts of the voltage stability constraint on real and reactive power prices.