초록 ▼

The state of combustion oscillation in the combustor of a turbine of a power plant is monitored from a remote monitoring center. To monitor the combustion oscillation state, combustion oscillation data on the combustor is separated into two types of data: the first data obtained on a real-time basis

The state of combustion oscillation in the combustor of a turbine of a power plant is monitored from a remote monitoring center. To monitor the combustion oscillation state, combustion oscillation data on the combustor is separated into two types of data: the first data obtained on a real-time basis, and the second data including representative values within a predetermined period of time obtained from the first data. In the normal state, a low-speed communications mode is used to send the second data, which is monitored at the monitoring center. If an abnormal state is predicted as a result of monitoring the second data, the high-speed communications mode is used to send the first data, and more detailed combustion oscillation data is monitored at the monitoring center. When a critical state is predicted, an instruction is sent to the local site to switch the operation mode over to the low load operation mode.

대표청구항 ▼

The state of combustion oscillation in the combustor of a turbine of a power plant is monitored from a remote monitoring center. To monitor the combustion oscillation state, combustion oscillation data on the combustor is separated into two types of data: the first data obtained on a real-time basis

The state of combustion oscillation in the combustor of a turbine of a power plant is monitored from a remote monitoring center. To monitor the combustion oscillation state, combustion oscillation data on the combustor is separated into two types of data: the first data obtained on a real-time basis, and the second data including representative values within a predetermined period of time obtained from the first data. In the normal state, a low-speed communications mode is used to send the second data, which is monitored at the monitoring center. If an abnormal state is predicted as a result of monitoring the second data, the high-speed communications mode is used to send the first data, and more detailed combustion oscillation data is monitored at the monitoring center. When a critical state is predicted, an instruction is sent to the local site to switch the operation mode over to the low load operation mode. sed loop concentration control system for a polishing slurry for a chemical mechanical polishing process, the control system comprising: mixing means for mixing a first feed, wherein said first feed flows into said mixing means to form a mixed fluid, wherein said first feed comprises an oxidant; closed loop concentration control means for determining a first concentration of said oxidant in said mixed fluid, said closed loop concentration control means monitors a second feed having said oxidant flowing into said mixing means by said first concentration of said oxidant so as to compensate the concentration of said oxidant in said mixed fluid, herein said mixed fluid flows toward said closed loop concentration control means, and then said mixed fluid flows into said mixing means; and transported means for transporting said second fluid into said mixing means to mix with said mixed fluid so as to form said mixed fluid having a second concentration. 2. The method according to claim 1, wherein said closed loop concentration control means comprises: a concentration detector having an output end and an input end, which is used to measure said first concentration of said oxidant in said mixed fluid, herein said mixed fluid flows toward said input end of said concentration detector from said mixing means; a piping controller, which connects with said output end of said concentration detector, herein said piping controller is used to control said mixed fluid to leave said closed loop concentration control means and flow into said mixing means; a valve having an output end and an input end, which is used to control flow of said second feed, herein said second feed flows toward said mixing means from said output end of said valve; and a program logic controller (PLC) means for receiving a concentration data, receiving a liquid level data, said program logic controller means converts said concentration data and said liquid level data into a supplementary quantity data by a table memorized in said program logic controller means to transport said second feed into said mixing means. 3. The method according to claim 2, wherein said concentration data which is received by said program logic controller (PLC) means is transmitted to program logic controller (PLC) means from said concentration detector. 4. The method according to claim 2, wherein said liquid level data which is received by said program logic controller (PLC) means is transmitted to program logic controller (PLC) means from said mixing means. 5. The method according to claim 3, wherein said supplementary quantity data of said second fluid is transmitted to said valve from said program logic controller (PLC) means. 6. A closed loop concentration control system for a polishing slurry of chemical mechanical polishing process, the control system comprising: first mixing means for mixing a first feed, wherein said first feed flows into said first mixing means to form a first mixed fluid, and said first feed comprises an oxidant; second mixing means for mixing a second feed and said first mixed fluid to form a second mixed fluid, herein said first mixed fluid flows toward said second mixing means from said first mixing means, and said second mixed fluid flows toward said first mixing means from said second mixing means; closed loop concentration control means for determining a first concentration of said oxidant in said second mixed fluid, said closed loop concentration control means monitors a second feed flowing into said second mixing means by said first concentration of said second mixed fluid so as to compensate the concentration of said oxidant, herein said second mixed fluid flows toward said closed loop concentration control means from said second mixing means, and then said mixed fluid flows into said second mixing means; and transported means for transporting said second feed into said second mixing means to mix with said mixed fluid so as to form said seco