CAJ | 학술논문

光煤互补热发电系统的设计过程中通常都要进行变工况计算，由小扰动理论可知，当系统变动不足以引起汽水重新分布时，省去繁杂的变工况计算也可得到精度合乎要求的结果。该文针对太阳能辅助加热系统对热力系统影响进行了定量分析，结果表明太阳能辅助加热系统只在某小范围内对热力系统的扰动可视为小扰动，在通常的取代范围内(30%~100%)虽然不能将其视为小扰动，但在节煤型和功率增大型两种运行模式下，进汽量和发电量的计算都可简化。此外当取代一段抽汽的百分数在60%以内，系统的热工转换率、发电热耗率、发电煤耗率的计算可以简化，将太阳能当余热处理时系统的热工转换率、发电热耗率、发电煤耗率的计算在全部取代范围内都可以简化，当取代一段抽汽的百分数在55%以内，集热场面积和初始投资的计算也可以简化，即以上这些参数利用小扰动法计算也可以得到符合工程精度要求的结果。研究结果为光煤互补复合发电系统的优化设计以及热经济性的分析计算提供了理论参考。
광매호보열발전계통적설계과정중통상도요진행변공황계산，유소우동이론가지，당계통변동불족이인기기수중신분포시，성거번잡적변공황계산야가득도정도합호요구적결과。해문침대태양능보조가열계통대열력계통영향진행료정량분석，결과표명태양능보조가열계통지재모소범위내대열력계통적우동가시위소우동，재통상적취대범위내(30%~100%)수연불능장기시위소우동，단재절매형화공솔증대형량충운행모식하，진기량화발전량적계산도가간화。차외당취대일단추기적백분수재60%이내，계통적열공전환솔、발전열모솔、발전매모솔적계산가이간화，장태양능당여열처리시계통적열공전환솔、발전열모솔、발전매모솔적계산재전부취대범위내도가이간화，당취대일단추기적백분수재55%이내，집열장면적화초시투자적계산야가이간화，즉이상저사삼수이용소우동법계산야가이득도부합공정정도요구적결과。연구결과위광매호보복합발전계통적우화설계이급열경제성적분석계산제공료이론삼고。
It is common that variable conditions are considered in the process of solar-assisted coal-fired power system designing. Small disturbance theory tells us that when no obvious water distribution happens complex variable conditions calculation can be saved and the results which meet required precision can be achieved as well. A quantitative analysis was conducted for the impact of the solar auxiliary heating system on the thermal system. The results show that within a small range the impact caused by the solar auxiliary heating system can be regarded as a small disturbance, while in the usual range(30% to 100%) although it can not be regarded as a small disturbance the calculation of steam admission flow and power generation can be simplfied under the coal-saving and power-boosting operation mode. In addition, the calculation of thermal conversion rate, generating heat rate and coal consumption rate can be simplified when the percentage of replacing point 1 extraction steam is under 60%; the calculation of thermal conversion rate, generating heat rate, coal consumption rate in waste heat utilization can be simplified no matter how the percentage of replacing extraction steam changes; the calculation of collector field area and the initial investment can also be simplified when the percentage of replacing point 1 extraction steam is under 55%. That is, the error of the caculation for the above parameters meet the engineering accuracy requirement when small disturbance algorithm is used. The above conclusion provides a theoretical reference for the optimal design and analysis of the solar-aided coal-fired power system.