摘要:
换流站采用大型调相机作为无功补偿手段,可加快电压恢复速率,降低换相失败风险,保障电网安全稳定。双水内冷调相机是目前广泛应用的大型调相机类型,以除盐水作为其冷却介质。国内调相机工程中除盐水系统一般采用超滤+一级反渗透+二级反渗透+EDI的全膜法水处理工艺。国内首批建设的大型调相机除盐水系统运行过程中,存在除盐水系统来水不稳定、超滤装置与反渗透装置流量不匹配、除盐水泵没有互为备用、反渗透加碱效果不满足要求、转子冷却水补水加碱无必要等问题,会对除盐水系统的制水能力、产水品质、使用寿命、运行维护以及调相机的运行稳定性造成影响。针对上述问题,深入分析了国内某调相机工程除盐水系统的设计和运行情况,提出了调相机除盐水系统工艺设计的改进建议,以期提升除盐水系统的稳定性和调相机运行的可靠性,为同类型调相机工程除盐水系统的设计和改造提供一定参考。
关键词:
调相机,
除盐水系统,
全膜法
Abstract:
The converter station adopts large synchronous condenser as a means of reactive power compensation to speed up the voltage recovery rate, reduce the risk of commutation failure, and ensure the safety and stability of power grid. Dual water intercooled synchronous condenser is a widely used type of large synchronous condenser, using demineralized water as its cooling medium. The demineralized water system of synchronous condenser projects in domestic adopts ultrafiltration+primary reverse osmosis+secondary reverse osmosis+EDI treatment process. In the operation of the first domestic construction of large synchronous condenser desalinization system, it is found that there exist some problems such as unstable water from the demineralized water system, unmatched ultrafiltration device and reverse osmosis device flow, non-standby each other for demineralized water pumps, dissatisfactory reverse osmosis alkali effect, unnecessary supplement water and alkali of rotor cooling water. These problems can affect the water production capacity, water quality, service life, operation and maintenance of demineralized water system and operation stability of synchronous condenser. Through an in-depth analysis of design and operation of the demineralized water system in domestic synchronous condenser project, the improvement suggestions of the demineralized water system were proposed, to improve the stability of demineralized water system and operation reliability of synchronous condenser. It can provide reference for the design and transformation of the same type demineralized water system project.
Key words:
synchronous condenser,
demineralized water system,
whole membrane method
中图分类号:
程一杰, 厚谞, 沈阳, 年长春. 调相机除盐水系统设计问题分析与改进建议[J]. 工业水处理, 2022, 42(8): 178-181.
Yijie CHENG, Xu HOU, Yang SHEN, Changchun NIAN. Analysis and improvement suggestions on design of demineralized water system in synchronous condenser[J]. Industrial Water Treatment, 2022, 42(8): 178-181.