Simulation of hydroelectric system control
This simulation package helps in the design and specification of control systems (governors) for hydroelectric power stations.
It is particularly useful at the feasibility study or preliminary design stages of the project life-cycle and only requires a minimum
amount of information (reservoir head, pipe lengths and diameters, turbine/generator ratings etc) for your proposed site.
The generic package is excellent for developers who recognise the value of early knowledge about system behaviour but
do not have the staff or software to do the modelling in-house. Take advantage of our previous experience in this field.
Simulation can also be a valuable diagnostic tool at existing installations where stability or response times are poor.
The package has been assembled with regard to IEEE Standard 1207-2004 "IEEE Guide for the Application of Turbine
Governing Systems for Hydroelectric Generating Units". It implements standard models for hydroelectric system control as described
in the classic IEEE article "Hydraulic turbine control models for system dynamic studies" .
You will get a CD containing detailed simulation data and a report. Learn more by downloading a sample client’s report (~2.6M PDF).
The main features are:
- Three different models of the hydraulic system (which can include multiple penstocks with a common supply tunnel):
- Nonlinear with elastic water column ('water hammer') computed using the Method of Characteristics (pdf ~245KB)
- Nonlinear with non-elastic water column.
- Linearised transfer function at a defined operating point.
- Linear models of the generator and Grid dynamics.
- Design of a basic PID controller using well-known tuning rules.
- Integrated model which connects the subsystems.
- Simulations performed for defined guide vane opening/closing rates, power dial-up (feed-forward) operation, frequency (speed) control and load rejection.
- Acquire a better understanding of the dynamic properties of the hydraulics early in the project so that its influence on system design can be taken into account.
- Assess system trade-offs before committing to procurement and installation.
- Predict dynamic performance and anticipate potential problems or design limitations.
- Shorten the project time by working on the control system in parallel with other tasks.
- Allow systems integration and commissioning to begin earlier in the project life-cycle.
- Fit your project into a Simulation Based Design framework (pdf ~130KB).
What we need from you:
- As a minimum, we need estimated values for the primary parameters of your system:
- Layout and dimensions of the conduit system.
- Identification of major hydraulic components.
- Turbine/generator ratings.
- As many constraints and/or requirements on system design as are currently available - for example,
other Plant intended to operate on an isolated grid, performance acceptance criteria.
You will get:
- A report which:
- Describes the simulations done within the study.
- Predicts pressure and flow variation in the conduit for different operational conditions.
- Provides the design for a basic PID governor.
- Assesses system performance under closed loop control - gives response times for electrical power
generation as operator demand and load vary.
- Interprets the results and identifies any features of potential concern.
- A CD containing time series and other data produced by the simulations.
- Learn more by downloading a sample client’s report (~2.6M PDF).
Beyond the generic package:
We can work with you to :
- Progressively refine and extend the simulation to keep pace with the overall project.
- Improve modelling accuracy by including electrical plant models, higher-order representation of the conduit,
turbine steady-state characteristics, saturation and rate limits, nonlinear servo components, PLC sequencing controls etc.
- Produce sensitivity studies (e.g. the effect of changes in inlet head).
- Make a real-time version of the system model for hardware-in-the-loop simulation interfaced to the governor hardware to be installed.
- Investigate advanced forms of control.
- Perform system identification and model validation based on measurements on the Plant.
- Provide a real-time Plant simulator that is suitable for operator training.
As a guideline, the price for the generic package ranges from £1,000 to £1,500 (+ VAT). This depends largely on how much detail
(boundary conditions) needs to be included in the hydraulic model and any features of the proposed system which lie outside the
scope of the standard set of models.