输电线路工程专业外文翻译

中文1665字

Electricity transmission tariffs for large-scale wind power consumption in western Gansu province, China

Abstract

Large-scale wind power transmission presents the power system with several challenges. The determination of the transmission tariff and the cost-sharing issue are potential obstacles which may influence the development of wind power. This paper analyses the incremental cost to the power system for long-distance transmission of wind power, considers the fixed and variable properties of the incremental cost and the risk of fluctuations in the cost, and establishes a comprehensive risk-based pricing model for long-distance transmission of large-scale wind power electricity. Gansu Province in China has abundant wind resources, so we use the Jiuquan wind power integration and the ±800 kV Gansu-Zhuzhou direct current (DC) power transmission as examples to test the validity of the model. The conclusions are as follows: the allowances for access grid connection cost should be separately estimated for the large-scale wind power base and long-distance transmission; and the long-distance transmission pricing of large-scale wind power should apply a two-part electricity transmission pricing system, in order to eliminate the volatility risk inherent in each simple allocation method, and the fixed and variable characteristics of the transmission cost. The transmission price must include compensation for depreciation, operation and maintenance costs, and also a reasonable return on investment, in order to offer an effective incentive and guidance mechanism for enterprises’ business development.

Keywords

●Large-scale wind power;

●Long-distance transmission;

●Transmission tariff;

●Incremental cost;

●Risk

中国甘肃省西部的大型风力发电关于电力传输的收费问题

摘要

电力系统中的大型风力发电传动提出了一些挑战。电能传输的收费标准的确定和共享的成本是阻碍风电发展的潜在因素。本文分析了以风力发电远程传输电能到电力系统的增量成本，考虑固定及增量成本和成本波动的风险变量的因素，并建立了一个大型风力发电远程传输综合风险定价模型。甘肃省具有丰富的风力资源，所以我们以酒泉的风电整合和±800 kV 甘肃株洲直流（DC）为例，验证说明这种电力传输模型的实用性。结论如下：接入电网连接的成本津贴应大致分为大型风电基地成本和远程传输电能的成本；而风电的大规模远距离输电的定价应分为由两部分组成的输电定价系统，以消除由单个简单的分配方法所产生的固定波动的风险，和固定传输成本的变化。输电价格必须包括折旧补偿，运行和维护成本，及合理的投资回报，这是提供企业业务发展的一种有效的激励和引导的机制。

关键词

●大范围的风能

●长距离传输

●输送电能的收费

●增加的成本

●风险

1. Introduction

With 7 GW wind power bases now being promoted, Chinese wind power development is switching to ultra-large-scale, high-concentration development and long-distance transmission, resulting in a greater than expected increase in transmission costs [1]. Currently, the Chinese transmission and distribution tariff has no clear independent pricing mechanism. It is mainly reflected by the difference between the retail tariff set by the government and the generation tariff also set by the government. However, with the acceleration of grid construction, the low transmission and distribution tariff seems increasingly contradictory. The consequence is that the electricity pricing mechanism cannot fully compensate the grid company, the power network cost cannot be incorporated into the retail tariff and the enthusiasm for wind power consumption is affected by the improper transmission and distribution tariff. In addition, the low transmission and distribution tariff is actually concealing inflation; this may dampen the enthusiasm of power investors and producers, causing a slowdown in grid construction, and continuous power supply tension, and finally affecting the security, stability, and ultimately the orderly and efficient operation of the grid system as a whole. The formulation of an allowance standard for wind power grid connection was based on the