9FA燃气轮机作为电网"黑启动"电源点的探讨

S109FA联合循环组在启动、加负荷的快速性上基本能满足电网“黑启动”的要求;当整个电网因故障停运后,9FA燃气轮机作为“黑启动”电源点的启动,需要启动电源和辅助蒸汽,用配备一套小功率的燃气轮机联合循环机组可以解决。即:用9FA燃气轮机配备的自动柴油发电机来启动小功率的燃气轮机联合循环机组,然后再逐渐完成“黑启动”,向外恢复供电。还分析了9FA燃机在“黑启动”时可能遇到的问题及对策。     

汽轮机小岛运行事故分析及解决方法

电网发生有限故障时电厂首先的应对是机组良好的、宽负荷范围的一次调频和及时恰当的二次调频作用.电网发生故障特别是当电厂存在脱离系统而带局域电网运行的可能时,汽轮机组精确完善的超速保护控制(OPC)是维持局域电网运行的极重要功能。当电网发生严重故障发电厂孤立运行时,成功实现机组迅速稳定到额定转速并带厂用电运行是电网恢复的最佳对策。     

广州天然气电厂燃气蒸汽联合循环发电机组的选择及经济技术分析

本文就现代化大都市广州适用的天然气燃气轮机联合循环发电机组的选择及其经济技术进行分析，论述大型燃气蒸汽联合循环发电机组技术方案，认为天然气发电的经济性是发展燃气蒸汽联合循环电厂的关键问题，在工程建设和天然气定价时应进行科学认证，合理规划。广州天然气发电厂应以大容量高效率燃气轮机发电机组为骨干机型，以降低电厂的能耗和比投资，提高天然气发电厂在电网中的竞争力。     

一种燃气内燃机-蒸汽轮机联合循环电厂基准热耗计算方法

燃气内燃机-蒸汽轮机联合循环电厂内燃机数量多、内燃机和汽轮机的组合运行方式多,全厂基准热耗计算及性能评估困难。介绍了一种能正确计算燃气内燃机-蒸汽轮机联合循环全厂基准热耗的方法,通过电厂的实际应用表明该方法真实的反映了电厂的基准热耗水平,保证了电厂与电网PPA协议的有效执行和电费的准确结算。     

西门子高度灵活的燃气轮机联合循环电厂

介绍了为满足电网对机组灵活性及降低全寿命运行成本的要求，西门子所提出的“灵活燃气轮机联合循环电厂(FlexPlant)”(下简称灵活电厂)设计理念，即一种具有频繁快速启动和调峰能力，总体运行效率更高。更灵活的联合循环电厂；并详细列举了“灵活电厂”设计中所采取的先进技术．以及在缩短启停时间，提高低负荷效率以及减少电厂的排放水平所取得的成果。“灵活电厂”具有的巨大经济效益和市场竞争力将明显超过现有的燃气轮机联合循环电厂。     

从深圳前湾燃机电厂成功投产经验分析我国9F级联合循环机组的发展空间

我国首批9F燃机捆绑招标电厂——深圳前湾燃机电厂3台9F燃气-蒸汽联合循环机组已于2007-03-30全部成功投产。投产后3台机组的主要性能指标全部达到并超过合同的要求。9F机组调峰能力强、排放低、效率高。燃气-蒸汽联合循环机组电厂不但可以提高天然气LNG站线的运行稳定性,同时可以满足电网系统对尖峰负荷机组日益增加的需求。9F级联合循环电厂在我国具备一定的生存发展空间。     

西门子H级燃气轮机助德国电厂刷新世界纪录

<正>据2015年6月3日《中国科学报》报道,近日,西门子H级燃气轮机已在lausward联合循环电厂按照计划首次点火。lausward是德国杜塞尔多夫市的传统供电中心,位于此地的lausward联合循环电厂预计于2015年年底投入商业运营。据悉,全新lausward燃气蒸汽联合循环发电机组的装机容量达595兆瓦,净效率将超过61%,在这两方面都将刷新     

联合循环电厂汽轮机供热运行的若干问题

国内某联合循环电厂由于汽轮机缺乏非设计工况下抽汽供热运行经验且需要参与电网调峰,经过对联合循环机组特性分析和现场运行数据的整理、优化,在保证机组安全的前提下,确定了汽轮机供热量和机组调峰能力,为指导运行人员操作和确定机组电网调峰能力提供了依据。     

试论望亭电厂部分改建联合循环电站的必要性

论述了望亭电厂为加强其在华东电网中调峰作用而部分改建燃气/蒸汽联合循环电站的必要性。     

联合循环机组AGC的实现

本文介绍了某天然气电厂60MW联合循环机组AGC系统的实现概况。通过modbus协议实现了DCS和Mark-V的通讯以及省电网调度中心和DCS的通讯,设计出了负荷分配和控制的策略,并给出了控制sama图,完成了厂内的负荷摆动试验以及和省电网调度中心的联调试验。AGC试验负荷曲线和结果分析表明,该系统实现了联合循环机组发电自动控制的功能,确保了该电厂如期投入商业运行。     

风电系统的无功功率与电网电压稳定

论述了风电容量在占局部电网相当比例时,风电机组的无功功率调整与电网电压之间的关系,对于定速和变速风电机组的运行特性做了分析,提出了在需要做无功功率调整时风电机组应能满足的特殊要求。     

New energy power generation-wind power generation

This paper introduced the status quo of wind power and wind power generation technology. Focusing on the introduction of wind power generating system ibrational self-consistent field（VSCF）, program implementation included Alternating Current （AC）-Direct Current （DC）-AC conversion system, magnetic field modulation generator system, doubly-fed generator system etc. Among these, doubly-fed generator system is the trend. Where to build the wind farm is very important, so a perfect site is needed. Wind power generation will have a bright future. As long as the wind power can be linked to the grid in large scale.     

Output power control for large wind power penetration in small power system

Nowadays, wind turbine generator (WTG) is increasingly required to provide control capabilities regarding output power. Under this scenario, this paper proposes an output power control of WTG using pitch angle control connected to small power systems. By means of the proposed method, output power control of WTG considering states of power system becomes possible, and in general both conflicting objectives of output power leveling and acquisition power increase are achieved. In this control approach, WTG is given output power command by fuzzy reasoning which has three inputs for average wind speed, variance of wind speed, and absolute average of frequency deviation. Since fuzzy reasoning is used, it is possible to define output power command corresponding to wind speed condition and changing capacity of power system momentarily. Moreover, high performance pitch angle control based on output power command is achieved by generalized predictive control (GPC). The simulation results by using actual detailed model for wind power system show the effectiveness of the proposed method.     

Output power variations with solar power satellites

The first comprehensive evaluation of output power variations expected from Solar Power Satellites is presented. The various factors are classified in a two tier manner as: deterministic (either periodic or non-periodic) and statistical (either constant with system life or changing with life). The largest variations are due to seasonal periodic factors, namely variations in the solar constant (± 3.3 per cent) and a solar illumination variation with the photovoltaic array held perpendicular to the orbit plane (± 4.2 per cent). Other key factors delineated which are being quantified presently include power reductions due to microwave power tube failure and silicon solar cell radiation damage, while multiple shadowing of adjacent power stations in geosynchronous orbit and rectenna structural factors and combining efficiency variations are representative of areas that need further study.     

Microthermophotovoltaic power generator with high power density

A promising energy source for portable MEMS devices, microthermophotovoltaic (micro-TPV) power generator, is described in this paper. The system mainly consists of a micro SiC combustor, and a GaSb photovoltaic (PV) cell array and a simple nine-layer dielectric filter, with a volume of about 3.1 cm³. When the flow rate of H₂ is 4.2 g/h, and H₂/O₂ ratio is 0.7, the system is able to deliver 3.06 W electrical power, the open-circuit voltage and short-circuit current are 2.31 V and 1.74 A, respectively, the result is a power density of about 1.0 W/cm³ (1 MW/m³). The effect of all kinds of factors on the performance of the micro-TPV system is also discussed in this paper.     

A hybrid power source for pulse power applications

Portable 12 V power supplies are used extensively for communications and power tool applications. These devices demand fast response times of the power supply. Fuel cells are generally best suited to continuous power applications and require an initial warm-up period, although they offer the prospect of increased operational duration over a battery for a given weight of portable system. This paper investigates the combination of specific energy performance from the fuel cell system with the specific power and response time of the battery. Two separate hybrid systems have been developed and tested; a planar, 20-cell, polymer electrolyte membrane fuel cell (PEMFC) stack together with either a lead–acid or nickel/cadmium battery; and a conventional 20-cell, bipolar, PEMFC stack. Both systems have been tested under pulse-load conditions at temperatures between −20°C and +40°C, and for comparison, the individual components have undergone similar tests. The hybrid systems have successfully operated continuously for several weeks under load profiles that the fuel cell alone could not sustain.     

Wind power and market power in competitive markets

Average market prices for intermittent generation technologies are lower than for conventional generation. This has a technical reason but can be exaggerated in the presence of market power. When there is much wind smaller amounts of conventional generation technologies are required, and prices are lower, while at times of little wind prices are higher. This effect reflects the value of different generation technologies to the system. But under conditions of market power, conventional generators with market power can further depress the prices if they have to buy back energy at times of large wind output and can increase prices if they have to sell additional power at times of little wind output. This greatly exaggerates the effect. Forward contracting does not reduce the effect. An important consequence is that allowing market power profit margins as a support mechanism for generation capacity investment is not a technologically neutral policy.     

Got power? [power engineers recruitment]

This paper discusses the different factors that can help to ensure that the future demand for power engineers will be met. These factors include the articulation of a compelling mission, development of a comprehensive strategy, execution of supporting tactics, and demonstration of leadership.     

Modeling market power in Korea's emerging power market

The Korean power market is being formed from the unbundled generation, transmission and distribution assets of Korea Electric Power Corporation. The KEPCO generation has been allocated to six independent gencos with a combined generating capacity of 46,629 MW in 2002. This gave an 11% margin over the peak load that year (41,921 MW).