RU2779822C2 - Diesel generator set control system - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, in particular, to control systems for diesel generator sets (DGS). The result is achieved by the DGS control system being made in the form of a parallel operation controller, a master controller, and a remote control panel. Input and output connectors are therein installed on the face and back panels of the parallel operation controller for connecting the DGS, common buses, additional section buses, the master controller, and switching apparatus.

EFFECT: possibility of parallel operation of multiple DGS for a common load.

5 cl, 6 dwg

Description

The invention relates to a control system for a diesel generator set (DGU), parallel operation of several DGUs (an additional section with a DGU) for a common load, connecting a dedicated load and supplying non-critical consumers (2 channels). The system is used for control and emergency protection of diesel generator set on ships, sea vessels with an unlimited navigation area and river vessels.

The closest analogue is the solution US 2004117077 A1 (publication date 06/17/2004), which discloses the control system of a diesel generator set in the form of a parallel operation controller (GENOP 71), a control controller (PLC) and a remote control panel (OR) operating from DC power sources 24 V.

This solution, although it performs the function of controlling the DGU, however, has a significant drawback - it does not provide for the implementation of the parallel operation of several DGUs (an additional section with a DGU) for a common load.

The objective of the proposed invention is to eliminate this drawback of the known control system.

The technical result of the proposed control system is to implement the possibility of parallel operation of several diesel generator sets for a common load.

This result is ensured by the fact that the diesel generator set (DGU) control system is made in the form of a parallel operation controller (KASKAD-M controller) (1), a control controller (K-2600.K controller) (2) and a remote control panel (K- 2600.KV) (3) characterized by the fact that on the front and rear panels of the KASKAD-M parallel operation controller (1) there are input and output connectors for connecting a diesel generator set, common buses (buses of the main switchboard (4)), buses of an additional section, control controller (2) and switching devices, while the parallel operation controller also includes a KM1 contactor (5) for disconnecting/connecting the diesel generator set to common buses; circuit breakers Q1 (6), Q2(7) with an independent release of power supply to the channels of non-essential consumers, while the contactors of the circuit breakers Q1 (6), Q2 (7) are combined with independent releases YO1 (8), YO2 (9) and additionally perform the function of executive devices for disconnecting channels from common buses, depending on the workload of the diesel generator set; contactor KM2 (10) of the additional section ensures disconnection/connection of the additional section to the common busbars; connector for connecting the manual/automatic synchronization button of the diesel generator set, which provides manual/automatic synchronization of the diesel generator set with common buses; connector for connecting the button for requesting the presence of a power reserve on the DGU, which provides a request for the presence of a power reserve on the DGU.

In this case, the parallel operation controller can optionally contain an expansion module (PRS-1-1 module) (11), which operates with the KASKAD-M controller (1) via the RS-485 port (12) and provides communication with external devices.

The DGU control system is also characterized by the fact that the front panel of the K-2600.K (2) control controller and the K-2600.KV remote control panel (3) contain buttons that control the DGU, an indicator panel for displaying software windows menus and light panels for the operation of the DGU, additional section, non-responsible consumers.

The DGU control system is characterized by the fact that input and output connectors are installed on the rear panel of the control controller for connecting the parallel operation controller and a remote control panel.

The DGU control system is characterized by the fact that a connector for connecting the control controller is installed on the rear panel of the remote control panel.

The description and operation of the proposed control system are explained taking into account those shown in Figs. 1-6 circuit diagrams.

The KASKAD-M (1) parallel operation controller is designed to control and emergency protect a diesel generator set and perform the following functions:

a) automatic/manual synchronization of the diesel generator set with common busbars under voltage;

b) connecting the diesel generator set to the common busbars, which are in a de-energized state, with automatic adjustment of the diesel generator speed before connection;

c) parallel operation of diesel generator sets connected to common buses for a common load with automatic distribution of active and reactive powers;

d) automatic/manual synchronization of diesel generator sets operating for different sections for further parallel operation;

e) disconnection of irresponsible consumers (2 channels), depending on the degree of loading of the connected DGU;

f) connecting a dedicated load at the operator's command after automatically reaching the required power reserve;

g) protection of DGU against reverse power;

h) automatic adjustment of the common bus current frequency, depending on the load level, up to a predetermined value;

i) automatic unloading of the DGU before disconnection from the common tires;

j) joint work with the control controller K-2600.K (2) via the RS-485 port (12). When working together KASKAD-M (1) and K-2600.K (2), it is allowed to switch control to the remote control K-2600.KV (3);

k) collaboration with the expansion module via the RS-485 port (12).

The control system includes a KASKAD-M parallel operation controller (1), a K-2600.K control controller (2) and a K-2600.KV remote control panel (3), powered by 9-32 V DC power sources. KASKAD-M (1), K-2600.K (2), K-2600.KV (3) are complete assembly units in metal cases with degrees of protection IP30 for KASKAD-M (1), as well as IP20 (on the front side) and IP44 (connection side) for K-2600.K (2), K-2600.KV (3). At the same time, input and output connectors are installed on the front and rear panels of KASKAD-M (1) for connecting a diesel generator set, common buses (buses of the main switchboard (4), buses of an additional section, controller K-2600.K (2) and switching devices. The front panel of K-2600.K (2), K-2600.KV (3) contains buttons that control the DGU, an indicator panel for displaying the windows of the program menu and light panels for the operation of the DGU, additional section, non-essential consumers, K2600 .K (2) and K-2600.KV (3) The rear panel of K-2600.K (2) has input and output connectors for connecting KASKAD-M (1) K-2600.KV (3). panel K-2600.KV (3) a connector for connecting K-2600.K (2) is installed.

During the operation of KASKAD-M (1), the following parameters are monitored and indicated on the display panel of the control controller K-2600.K (2) via the RS-485 port (12):

- voltage phase (N-A) or linear (A-B);

- voltage phase (N-B) or linear (V-C);

- voltage phase (N-C) or linear (C-A);

- phase A current;

- phase B current;

- phase C current;

- DGU current frequency;

- active power output by DGU;

- reactive power delivered by DGU;

- power factor of DGU;

- DGU reverse power;

- common bus voltage - phase (N-A), or linear (A-B);

- busbar voltage of the additional section - phase (N-A), or linear (A-B);

- common bus current frequency;

- busbar current frequency of the additional section;

- supply voltage of the KASKAD-M parallel operation controller (1).

During the operation of KASKAD-M (1), the output of signals and control of the following devices is provided:

- connection/disconnection of the diesel generator set to the common buses by means of the contactor of the diesel generator set;

- disconnection of one of the two channels of irresponsible consumers, depending on the workload of the DGS, by means of a contactor for supplying power to the channel of irresponsible consumers;

- connection/disconnection of an additional section to the common busbars at the operator's request by means of an additional section contactor;

- distribution of reactive power by means of a voltage regulator of the DGU generator;

- distribution of active power by means of the DGU engine speed controller;

- “generalized accident” signal;

- permission to connect the load at the request of the operator in the presence of the necessary power reserve by means of a signal to enable the connection of the load (in the absence of a power reserve, its creation by automatically starting and connecting the required number of DGUs to the common buses);

- management of backup relay outputs.

During the operation of KASKAD-M (1), the following signals are received from the actuators and the operator:

- feedback from the DGU contactor (on/off);

- feedback from the automatic switch of irresponsible consumers of one of the channels (on/off);

- feedback from the additional section contactor (on/off);

- request for availability of power reserve;

- prohibition of automatic synchronization;

- feedback from redundant discrete inputs.

Information about disconnection/connection of the DGS is transmitted via the TIA/EIA-485 (EIA-RS-485) interface to the K-2600.K, which, after processing the received information, displays the generalized control result, numerical values of the electric power parameters of the DGS and common buses.

Structurally, contactors Q1 (6), Q2 (7) are combined with independent releases YO1 (8), YO2 (9) and additionally perform the function of actuators for disconnecting channels of non-essential consumers from common buses, depending on the load of the diesel generator set.

Connector for the button "S1" for manual/automatic synchronization of the diesel generator set. The manual/automatic genset synchronization button provides manual/automatic synchronization of the genset with common buses. The choice of the synchronization mode of the diesel generator set of the additional section is carried out by the operator. In the inactive (initial) state of the "S1" button, automatic synchronization is carried out, in the active (clamped) state - manual synchronization.

Connector for the button "S2" for requesting the presence of a power reserve. Button "S2" provides a request for the presence of a power reserve on the DGU. The request for the presence of a power reserve at the DGU is carried out by the operator. By pressing the "S2" button, a request is made for the presence of a power reserve at the genset.

Connecting a dedicated load (consumers) is carried out when the necessary power reserve is automatically reached on the main buses.

Expansion module PRS-1-1. The PRS-1-1 expansion module works with KASKAD-M via the RS-485 port and provides communication with external devices.

KASKAD-M operating modes.

Cascade provides the following modes of operation:

- "automatic synchronization" mode with autorun function - "AUTO" mode;

- "automatic synchronization" mode with the function of manual start and stop of the DGU engine;

- manual synchronization mode.

"Auto sync" mode with autorun function.

In the "automatic synchronization" modes with the autostart function, automatic synchronization of the diesel generator set with common tires, automatic synchronization of the additional section with common tires, and performance of functions in accordance with listing b), c), e)-l) are provided.

During the operation of KASKAD-M, it is ensured that automatic synchronization of the diesel generator set with common buses is prohibited, automatic synchronization of the additional section with common buses with the issuance of an emergency warning signal (hereinafter, APS) "FAIL SYNCHRONIZATION WITH THE GENERATOR" or "FAIL SYNCHRONIZATION TO THE SECTION" in case of unsuccessful synchronization after time.

Automatic synchronization mode” with the function of manual start and stop of the DGU engine.

In the "automatic synchronization" modes with the function of manual start and stop of the diesel generator set engine, automated synchronization of the diesel generator set with common tires, automated synchronization of the additional section with common tires, and performance of functions in accordance with listing b), c), e)-l) are provided.

During the operation of KASKAD-M, automated synchronization of the diesel generator set, automated synchronization of the additional section with common buses is ensured with the issuance of the APS "FAIL SYNCHRONIZATION WITH THE DGU" or "FAIL SYNCHRONIZATION TO THE SECTION" in case of unsuccessful synchronization after the expiration of time.

Manual synchronization mode.

In the manual synchronization mode, manual synchronization of the diesel generator set of the additional section with common tires and the performance of functions in accordance with listings b), c), e)-l) is provided.

When KASKAD-M (1) and K-2600.K (2) work together with K-2600.KV (3), a signal is issued to start and connect additional DGUs depending on the power consumption, or when redundant according to APS signals (appearance of reverse power, receiving a signal about a diesel generator failure or a malfunction of the diesel generator at the same time as the signal - the diesel generator stops).

When several DGUs are operating, the sequence of their start and stop is set in the programmable parameters K-2600.K.

The proposed invention successfully solves the main problem, which is to realize the possibility of parallel operation of several diesel generator sets for a common load.

Claims (5)

1. The diesel generator set (DGU) control system is made in the form of a parallel operation controller, a control controller and a remote control panel, characterized by the fact that input and output connectors are installed on the front and rear panels of the parallel operation controller to connect the DGU, common buses, tires an additional section, a control controller and switching devices, while the parallel operation controller also includes a contactor KM1 for disconnecting / connecting the diesel generator set to common buses; circuit breakers Q1, Q2 with an independent release for supplying power to the channels of non-critical consumers, while the contactors of the circuit breakers Q1, Q2 are combined with independent releases YO1, YO2 and additionally perform the function of actuators for disconnecting channels from common buses, depending on the load of the diesel generator set; contactor KM2 of the additional section, which provides disconnection / connection of the additional section to the common busbars; connector for connecting the manual/automatic synchronization button of the diesel generator set, which provides manual/automatic synchronization of the diesel generator set with common buses; and a connector for connecting the button for requesting the presence of a power reserve on the DGU, which provides a request for the presence of a power reserve on the DGU. 2. The diesel generator control system according to claim 1, characterized in that the parallel operation controller contains an expansion module that operates with the parallel operation controller via the RS-485 port and provides communication with external devices. 3. The diesel generator control system according to claim 1, characterized in that the front panel of the control controller and the remote control panel contains buttons that control the diesel generator, an indicator panel for displaying program menu windows and light panels for the diesel generator operation. 4. The control system of the diesel generator set according to claim 1, characterized in that input and output connectors are installed on the rear panel of the control controller for connecting the parallel operation controller and a remote control panel. 5. The control system of the diesel generator set according to claim 1, characterized in that a connector for connecting the control controller is installed on the rear panel of the remote control panel.

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