System for controlling electrical power generation

Abstract

The proposed system for controlling electrical power generation includes power generating units each having an electrical generator parallel-connected to an electric grid via a circuit breaker, programmable control and protection means, and a primary power engine. At least one active loading device is connected to the grid parallel to the generator. The programmable control and protection means include a microprocessor-based excitation system, an automatic excitation regulation controller, and an electrical generator differential protection controller. The controllers are connected to one another and to the microprocessor-based excitation system, the circuit breaker and a plant computer for controlling the power generating units, the plant computer being the end point in a two-way wireless communication link with a dispatch computer for remotely controlling and monitoring the power generating units.

Claims

1. A system for controlling electrical power generation comprising: at least two power generating units located on a power plant; each said power generating unit is parallel connected substantially to an electric grid, each said power generating unit including: an electric generator furnished with an exciter, and programmable means of control and circuit protection; a two-way communication channel having a first end point located on the power plant and a second end point located outside of the power plant; said two-way communication channel essentially connects a plant computer with a dispatch computer; said plant computer is installed at the first end point, and used for controlling said at least two power generating units; said dispatch computer is installed at the second end point and used for remote controlling said at least two power generating units via said two-way communication channel; at least one active electric load device parallel connected to said at least two power generating units; and a number of circuit breakers switchably connecting said at least two power generating units and said at least one active electric load device with said electric grid through electric transmission lines; wherein said programmable means of control and circuit protection include: a microprocessor excitation circuitry connected to said exciter of the corresponding electric generator, a controller of automatic regulation of excitation of the corresponding electric generator, and a controller of differential protection of the corresponding electric generator; and said controller of automatic regulation and said controller of differential protection are connected to each other, and connected at least with the corresponding microprocessor excitation circuitry, said circuit breakers, and said plant computer.

2. The system according to claim 1, wherein the controller of differential protection is connected with at least one said circuit breaker of the corresponding electric transmission line.

3. The system according to claim 1, wherein the controller of automatic regulation is connected with said microprocessor excitation circuitry.

4. The system according to claim 1, wherein the controller of automatic regulation is connected with said exciter.

5. The system according to claim 1, wherein the controller of automatic regulation is connected with said vacuum circuit breaker.

6. The system according to claim 1, wherein the controller of automatic regulation and the controller of differential protection are connected with each other, with said microprocessor excitation circuitry, said circuit breakers, and said plant computer via wired communication channels.

7. The system according to claim 1, wherein the controller of automatic regulation and the controller of differential protection are connected with each other, with said microprocessor excitation circuitry, said circuit breakers, and said plant computer via wireless communication channels.

8. The system according to claim 1, wherein said microprocessor excitation circuitry is furnished with a user interface capable of adjusting said microprocessor excitation circuitry.

9. The system according to claim 1, wherein said programmable means of control and circuit protection are thermostated.

10. The system according to claim 1, wherein said two-way communication channel is represented by a satellite channel.

11. The system according to claim 1, wherein said two-way communication channel is represented by a wireless communication channel, another than a satellite channel.

12. The system according to claim 1, wherein each said power generating unit includes a primary power engine represented by at least one gas-turbine engine.

13. The system according to claim 12, wherein said primary power engine is made mobile.

14. The system according to claim 1, wherein each said power generating unit includes a primary power engine represented by at least one diesel engine.

15. The system according to claim 14, wherein said primary power engine is made mobile.

Description

BRIEF DESCRIPTION OF DRAWING

[0013] FIGURE attached hereto schematically shows the system for control of electrical power generation, according to a preferred embodiment of the present invention.

DETAIL DESCRIPTION OF PREFERRED EMBODIMENTS

[0014] The proposed system for control of electrical power generation is illustrated on FIGURE. The base portion of the system is a plurality of power generating units N, N+1, N+2, . . . , N+n, which provide for generation of electric energy, and which are parallel connected to an electric grid. FIGURE depicts the embodiment that employs power generating units utilizing the aforesaid mobile automatic electric stations.

[0015] Active load devices 9 are associated with the electric grid via transformers 8 connected in parallel to the power generating units N, N+1, N+2, . . . , N+n. Each of the power generating units includes known equipment: a primary power installation 6 (a gas-turbine or diesel engine, or an engine of another conventional type), an electric generator 5, circuit breakers 3 and 10, thermostated programmable means of control and circuit protection 1 and 2.

[0016] The programmable means of control and circuit protection 1, 2 include controllers 1 and an excitation circuitry 2, which are connected with a plant computer 4 being an end point of a two-way wireless channel for communication with a dispatch computer 7 for remote control and management of the power generation units. The communication channel is preferably represented by a satellite communication channel.

[0017] The proposed control system can be employed as a part of a scaled power supply system arranged on any area and territory relief. The microprocessor excitation circuitry 2 incorporates a converter preferably assembled based on bi-polar transistors with an isolated gate (e.g. a known excitation circuitry with an IGBT converter). The controllers 1 encompass an automatic regulation controller (AGC) 1.sup.AGC and a controller of differential circuitry protection (MDR) 1.sup.MDR.

[0018] The excitation circuitry 2 is associated with a user interface for manual adjusting the excitation circuitry, which excitation circuitry is immediately connected to an exciter of the electric generator 5; the controller of automatic regulation and the controller of differential protection of electric generator are interconnected, and connected with the microprocessor excitation circuitry 2, and circuit breakers 3 and 10.

[0019] The controller of differential protection 1.sup.MDR is connected with high voltage circuit breakers 10 of electric transmission lines. The controller of automatic regulation 1.sup.AGC is connected with the microprocessor excitation circuitry 2, the exciter of the electric generator, and the vacuum circuit breaker 3 of the power generating unit. For connection of the controller of differential protection 1.sup.MDR and the controller of automatic regulation 1.sup.AGC wired (established connection technology) or wireless (where wires can be damaged) communication channels can be employed.

[0020] Collective operation of the controller of automatic regulation 1.sup.AGC and the controller of differential protection 1.sup.MDR provides for uninterrupted management of operation of the whole power supply system under conditions of abrupt seasonal and daytime temperature changes and various phase lags (overloads and under-loads, short circuits, etc.).

[0021] The controller of automatic regulation 1.sup.AGC automatically distributes the electrical load among the power generating units N, N+1, N+2, . . . , N+n proportionally, or according to pre-set up threshold values, and provides for all protection types of the primary power engine 6 and electrical generator 5. The controller of differential protection 1.sup.MDR provides for circuit protection within the section starting from the vacuum circuit breaker 3 to the generator 5.

[0022] The excitation circuitry 2 provides for connecting the power generating unit to the electric grid by a precise synchronization method, automatic adjustment of voltage of the electric generator 5 to the grid voltage, an accelerated reestablishing the voltage of generator 5 upon jumps of the electrical load, maintaining the voltage in pre-set up limits under surgeless raising and reducing the rotation speed of the electric generator 5.

[0023] In case of failure of consumer load devices and disconnection of the high voltage circuit breakers 10, the active load devices 9 provide for electric load of the power generating units N, N+1, N+2, . . . , N+n without an actuation of reverse power protection and a fragmentation of parallel connection.

[0024] Control of the controller of automatic regulation 1.sup.AGC, the controller of differential protection 1.sup.MDR, and the excitation circuitry 2, as well as control for current state of the power supply system, and recording events can be accomplished through a satellite communication channel (or an on-earth radio-communication channel) from the dispatch computer 7, providing remote control. Alternatively, if necessary, manual control of the power generating units can be accomplished from the plant computer 4.

[0025] Adjustments of the microprocessor excitation circuitry 2 can be carried out from the computers 4 and 7, as well as immediately via the aforementioned user interface.

[0026] Thusly, the proposed system for control of electrical power generation provides for high reliability, and can be applied for non-interruptive production of electric energy, especially in locations with extremely continental and arctic climate.