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| Number | Title | Issue Date |
| 8140296 | Method and apparatus for generalized performance evaluation of equipment using achievable performance derived from statistics and real-time data A statistical performance evaluation system for a thermodynamic device and process uses the achievable performance derived from statistics and real-time data for the device or process to evaluate the current performance of the device or process, and to adjust the op... | 03/20/2012 |
| 8104283 | Steam temperature control in a boiler system using reheater variables A technique of controlling a boiler system such as that used in a power generation plant includes using manipulated variables associated with or control inputs to a reheater section of the boiler system to control the operation of the furnace, and in particular to c... | 01/31/2012 |
| 7930045 | Two-stage model predictive control technique A two-stage model predictive control (MPC) controller uses a process model and two separate MPC control modules, including a feedforward MPC control module and a feedback MPC control module, to determine a set of control signals for use in controlling a process. The... | 04/19/2011 |
| 7909064 | Hydraulic isolating manifold An isolating manifold fluidly connected between a hydraulic valve and a hydraulic manifold operates to automatically isolate the valve from the hydraulic manifold as the valve is removed from the manifold, without requiring any particular blocking and bleeding proce... | 03/22/2011 |
| 7890214 | Method and apparatus for controlling soot blowing using statistical process control A statistical process control system employs a consistent soot blowing operation for a heat exchange section of, for example, a fuel burning boiler, collects heat absorption data for the heat exchange section and analyzes the distribution of the heat absorption data... | 02/15/2011 |
| 7890197 | Dual model approach for boiler section cleanliness calculation A method of controlling soot blowers near a heat exchange section includes generating models of both the ideal clean operating condition of the section and the dirty operating condition. The current operating condition of the section is used to calculate a reliabili... | 02/15/2011 |
| 7874241 | Electronically controllable and testable turbine trip system A tripping control system for use with, for example, turbines, includes a block circuit having two or more redundant blocking valves disposed or connected in series within a pressure supply line to block the supply of hydraulic fluid within the pressure supply line ... | 01/25/2011 |
| 7856280 | Process control and optimization technique using immunological concepts An integrated optimization and control technique performs process control and optimization using stochastic optimization similar to that used in biological immune systems during on-line operation of a process, the technique collects and stores indications of process... | 12/21/2010 |
| 7826908 | Variable rate feedforward control based on set point rate of change A method of controlling a power generating unit or other process equipment with a slow reaction time includes creating a feedforward control signal to selectively include a fast response rate component or a slow response rate component based on the average rate at w... | 11/02/2010 |
| 7668623 | Steam temperature control using integrated function block The disclosure is directed to a saturated water spraying system configured to rapidly respond to rapid load changes by implementing a single integrated DCS control block. The integrate DCS control block may include a plurality of process control routines that are ne... | 02/23/2010 |
| 7474080 | Method and apparatus for providing economic analysis of power generation and distribution An economic dispatch program optimally allocates load demand specifying real power and reactive power to be generated by a power plant among various power generators in a manner so that each of the power generators are operated within its optimal operating space as ... | 01/06/2009 |
| 7385300 | Method and apparatus for determining actual reactive capability curves A system for generating updated reactive capability curves of a generator operates the genarator at a number of operating load levels and at a number of different power factors to collect data regarding the real and reactive power generated at each of the various op... | 06/10/2008 |
| 7383790 | Method and apparatus for controlling soot blowing using statistical process control A statistical process control system employs a consistent soot blowing operation for a heat exchange section of, for example, a fuel burning boiler, collects heat absorption data for the heat exchange section and analyzes the distribution of the heat absorption data... | 06/10/2008 |
| 7288921 | Method and apparatus for providing economic analysis of power generation and distribution An economic dispatch program optimally allocates load demand specifying real power and reactive power to be generated by a power plant among various power generators in a manner so that each of the power generators are operated within its optimal operating space as ... | 10/30/2007 |
| 7190149 | Method and apparatus for determining actual reactive capability curves A system for generating updated reactive capability curves of a generator operates the generator at a number of operating load levels and at a number of different power factors to collect data regarding the real and reactive power generated at each of the various op... | 03/13/2007 |
| 7137407 | Trip manifold A trip manifold assembly is disclosed which includes a manifold body connected to a header shaft. The header shaft passes through a plurality of rotary valves. Each rotary valve is connected to a pressure transmitter. The header shaft comprises two passages includin... | 11/21/2006 |
| 7109446 | Method and apparatus for improving steam temperature control A system for analyzing the impact of operating soot blowers in a heat transfer section of a power plant determines a steam temperature influencing sequence and calculates a feed-forward signal to be applied to a steam temperature control system of the heat transfer ... | 09/19/2006 |
