JSC IAES - integrated solutions for electric power industry
The main goal of IAES is to provide the complete lifecycle of the following operations: scientific development, project management, design work and introduction of automatic devices for electric power systems.
Our strategy priorities are enhancement of efficiency, social responsibility, science and innovations.
IAES is engaged in design of relay protection, emergency control systems, communication systems, produces local-and-system automatic devices.
Working with IAES, you will get complex solutions for power engineering facilities: our specialists have great experience in design and development activities. Our specialists reliably realize all steps of cooperation from design up to inculcation.
Responsibility, competence, goal orientation, an ability to compromise, accessibility and honest in business communication are the main principles of the company. Our specialists deliver work on turnkey basis and provide technical support of the embedded systems.
IAES is a fast-growth company and it is always open for business communication. The plans for the future are improvement of the current research-and-development projects, search for promising new solutions for power industry, maintaining business partnership with our clients, territorial extension and diversification.
Local emergency control systems
Local emergency control systems (LECS) based on Multifunctional Emergency Control Complex (MECC) are one of the most required products of CJSC IAES. Depending on a purpose, LECS function as:
a) Separate automatic equipment which detects faulty and abnormal conditions in electric power system and generates control actions. Functions of the equipment include:
- automatics for elimination of asynchronous operation (AEAO) and single-phase conditions (AESPC);
- automatic overvoltage protection (AOVP) and breaker failure protection (BFP);
- automatics for shunt reactor control (ASRC);
- automatic undervoltage protection (AUVP);
- automatic overcurrent protection (AOCP);
- automatic maximum power protection (AMPP);
- automatic underfrequency protection (AUFP);
- automatic overfrequency protection (AOFP);
- a device for determination of short-circuit severity (DDSCS);
- a pre-fault load control device (PFLCD);
- automatic underfrequency standby infeed (AUFSI);
- automatics for anticipatory power system separation (AAPSS);
b) Peripherals providing the work of centralized stability control schemes:
- automatics for fixation of power line or power transformer tripping (AFPLT or AFPTT);
- automatics for fixation of a shunt reactor state (AFSRS);
- execution unit for load shedding (EULS);
- execution unit for generation shedding (EUGS);
- automatics for receiving/transmitting of control actions (ARTCA) generated by emergency control systems;
- I/O controller for analog and discrete information.
LECS are produced by the company as computer terminals (cabinets) which realize one (e.g. AEAO) or more emergency control functions. Among our customers the most required sets of functions realized within one terminal are:
- for 330 kV (and higher) power transmission lines: AEAO, AOVP with BFP, AESPC, AFPLT, ASRC, AFSRS, AOCP;
- for 110-220 kV power transmission lines: AEAO, AOVP with BFP, AFPLT, AOCP;
- for power autotransformers: AEAO, AFPTT, AOCP;
- AOCP or AEAO for several 110-220 kV power transmission lines;
- AUFP (underfrequency load shedding coupled with frequency-actuated automatic reclosing), AUVP with simultaneous control of frequency and voltage in several nodes (busbars);
- AUFP, AUVP in conjunction with EULS;
- AOFP in conjunction with EUGS.
As a rule, wide variety of combinations of the automatics realized within single LECS terminal as well as their technical and algorithmic work conditions makes their developing project-oriented. Therefore we work on every single request from our customers individually. We take into consideration peculiarities of power network where LECS are supposed to be used; we consider work of our production in conjunction with other emergency control systems and protective equipment; we provide ease of use and control of our production.
Control actions adjustment device
Control actions adjustment device (CAAD) based on the MECC terminals is designed for generating control action stages in order to prevent power system instability caused by contingency situations within a controlled power region.
Depending on the configuration, the device functions as:
– separate automation for control actions adjustment storage;
– local instability prevention automation;
– central emergency control system;
– control actions adjustment complex.
The choice of control actions is made by using «BEFORE-I» and/or «BEFORE-II» methods, at that control actions determination algorithms can operate independently so control action determination method can be assigned individually for each contingency-detector.
The device has a built-in central transceiver station (CTSS) used to provide CAAD information on pre-contingency power system operating mode and power equipment status. This information can be obtained both at the local level and remotely through telemetry systems. The current operating mode of the controlled power region can be estimated at the stage of preparing pre-contingency information.
IEC 60870-5-104 Transmission Protocols are used for gathering pre-contingency information and for information exchange between upper-level and lower-level devices.
Standard CAAD is able to process up to 64 input signals and produce up to 64 dry-contact-type output signals. Alarm signals are registered in the real-time mode. In addition, building of complicated and dependent contingency-detectors including information on any number of alarm signals is also available.
CAADs are produced in the following forms:
– one-cabinet form: one control terminal in a single cabinet (including working and protection half-sets);
– two-cabinets form: one control terminal in a single cabinet along with a switch cabinet;
– three-cabinet form: two control terminals in two cabinets with common switch cabinet;
– four-cabinet form: two two-cabinets CAADs.
When there are two control terminals used one of the terminals can be working while the other is standing by.
Group active and reactive power controller
Group active and reactive power controller (GARPC) is designed to control active and reactive power flows of a hydropower plant (HPP) or part of its hydropower units.
The device is automatic process control system. Putting it in operation allows to:
– significantly facilitate work of personnel;
– increase HPP energy efficiency due to significant decrease in energy resources consumption and energy losses;
– reduce wearing of HPP permanent equipment;
– perform smooth control of hydropower units with deviation from power-system load curve not exceeding 0,1% with all limits taken into consideration;
– receive and process any control commands from automatic load-frequency control under different power system work conditions.
The use of a multi-level structure of the GARPC makes it possible to:
– simplify function set of separate elements;
– reduce the number and length of control cables;
– improve overall reliability of the controller.
The subsystem of active power control generates control actions and transmits them into hydroturbine governors in order to:
– distribute total HPP active power between the hydorpower units with taking into consideration performance curve of every single hydroturbine under group control and thus provide optimal work conditions;
– change HPP total power generation according to the generation schedule;
– carry out individual control of hydroturbines in active power generation;
– carry out astatic / static frequency control;
– provide secondary frequency regulation to reach unscheduled generation mode if the subsystem receives the corresponding signals via telemechanic channels from centralized automatic system of load-frequency control with taking into consideration signals from emergency control systems (e.g. automatic overfrequency protection, automatic switching over to a reserve source with frequency control).
The subsystem takes control over blades of a Kaplan turbine (adjustable-blade turbine) and works in the following possible modes:
– waterturbine combinator. In this case waterturbine blades are controlled by blade-control valve in accordance with performance curves of turbines;
– GARPC, typical performance curves. In this mode GARPC takes control over waterturbine blades and put them into the position corresponding to the typical performance curves specified by a user as GARPC settings;
– GARPC, mode optimization. In this case GARPC takes control over waterturbine blades and carries out searching for angle of blade at which optimal waterturbine efficiency is reached.
The subsystem of group voltage and reactive power control (GVRPC) generates output signals acting on automatic excitation control in order to:
– provide equal distribution of the total HPP reactive power between hydropower units under group control with taking into account individual requirements on steady-state stability, minimum excitation field, maximum output power;
– change voltage level on HPP buses according generation schedule;
– individually control hydropower units in reactive power;
– carry out astatic / static voltage control taking into account signals received from emergency control systems (e.g. automatic undervoltage protection).
Thermal control system for electrical equipment
Thermal control system for power station equipment is designed for performing continuous monitor for temperature conditions of the unit main components, comparing the measured temperature values with the set points and generating output signals and control actions to be transmitted into process control systems, process protection and alarm systems on the basis this comparison. The thermal control system also provides displaying of the received information in the convenient and understandable form.
The distinctive features of the thermal control system are:
• constant monitoring of temperature conditions of unit main components;
• acceptable temperature conditions check;
• generating of control actions and their transmission into the power facility process control system;
• flexible binding to a power facility;
• user-friendly interface;
• thermal control characteristics and settings can be configured by the personnel;
• high reliability.
JSC "IAES" develops and produces the line of devices based on modern analog-relay equipment and on finished digital blocks released by domestic producers. These devices are used to perform simple functions and can be accommodated in one cabinet if number of the functions is small. Such devices have sufficient reliability, maintainability and relatively low cost which often makes their use more justified than the use of relatively expensive programmable emergency control devices.
Devices of this class are:
• Transmitter-receiver unit for protective equipment and emergency control systems (TRU for PE&ECS). This device is an intermediate link between communication channels (fiber-optic or high-frequency lines) and systems of relay protection and emergency control. The device provides exchange of digital signals (control actions) generated by protective equipment and emergency control systems with reproduction and transmission of the received signals; it also provides complete package of alarm and recording functions.
• Feeder trip latching device (FTLD). This device is filled with a set of blocks that latch up the position of power supply equipment, e.g. power lines, power transformers, generator-transformer units, etc. The blocks are made with use of modern electromechanical relays. If necessary, special devices which receive signals from trip/close circuit supervision and anti-pumping relay for latching current breakers position can be installed in the cabinet. From 4 to 6 FTLDs can placed within single cabinet.
• Executive load shedding device (ELSD). The device is designed for reproducing of load shedding control actions on the site. Load shedding is performed by acting on the feeder current breakers directly as well as through load shedding auxiliary circuits. The function of operative or automatic load reclosing is also provided.
• Automatic undervoltage and underfrequency protection terminals based on domestically developed and made digital components. The terminals are designed to organize on-site load shedding by acting on the feeder current breakers directly as well as through load shedding auxiliary circuits (on demand). The function of frequency-actuated automatic reclosing is also provided. Combining of these terminals together with ELSDs in a single cabinet is possible and performed on demand.
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