CN202026149U

CN202026149U - Electric network voltage limit load centralized control system

Info

Publication number: CN202026149U
Application number: CN201120133475XU
Authority: CN
Inventors: 韩红生
Original assignee: Zhumadian Power Supply Co of Henan Electric Power Co
Current assignee: Zhumadian Power Supply Co of Henan Electric Power Co
Priority date: 2011-04-29
Filing date: 2011-04-29
Publication date: 2011-11-02
Anticipated expiration: 2021-04-29

Abstract

The utility model discloses an electric network voltage limit load centralized control system, which comprises a centralized control device, an electric power telecontrol host machine, an electric power telecontrol sub machine, an electric network dispatching side optical transmitter and receiver, an electric power system optical fiber channel, a transformer substation optical transmitter and receiver and an execution unit circuit, wherein the centralized control device comprises a central processing unit and an electric network real-time signal collection circuit, wherein the signal output end of the electric network real-time signal collection circuit is connected with the signal input end of the central processing unit, the signal output end of the central processing unit is connected with transformer substation optical transmitter and receiver sequentially through the electric power telecontrol host machine, the electric network dispatching side optical transmitter and receiver and the electric power system optical fiber channel, and the signal output end of the transformer substation optical transmitter and receiver is connected with the signal input end of the executing unit circuit through the electric power telecontrol sub machine. The electric network voltage limit load centralized control system has the advantages that electric network dispatching watchmen can accurately, fast and conveniently execute electric network voltage limit load instructions, the work load of the electric network dispatching personnel is reduced, the automatic management level of an electric network is improved, and the intelligent management of the electric network can be realized.

Description

Electrical network is pressed the limited load centralized control system

Technical field

The utility model relates to power network dispatching system, relates in particular to a kind of electrical network and presses the limited load centralized control system.

Background technology

At present; in the dispatching of power netwoks operational management; for guaranteeing the grid equipment safe operation; be equipped with corresponding automation protective device; when emergency episode appears in electrical network; low frequency, low pressure load-shedding equipment can excise some electric loads rapidly, keep the sending out of electric power system, output power balance, and this also is the grid automation protective device of use at present commonplace, comparative maturity.But it is very little that the probability of accident appears in electrical network; electrical network is under non-accident condition; the for example recent system's generated output deficiency that causes because of electric coal is in short supply, part generating set are because when lacking the power supply shortage that other reason such as coal shutdown causes; dispatching of power netwoks operators on duty at different levels will in time control the network load in institute jurisdiction district according to the given power consumption index of higher level's dispatching of power netwoks person on duty, to guarantee electric power netting safe running.The transformer station that the dispatching of power netwoks mechanism of province, city's one-level is administered is very many, and workload was very big, very busy when the dispatching of power netwoks person on duty pressed the net of rationing the power supply to load at needs.

The utility model content

The purpose of this utility model provides a kind of electrical network and presses the limited load centralized control system, can send electrical network from each transformer station of trend by central controller and press limited load instruction disconnection to go out wiretap accordingly, to realize the management work of intelligent electrical network.

The utility model adopts following technical proposals:

The load of the required pressure limit of the utility model electrical network is passed through the switch trip of power remote main frame, dispatching of power netwoks sidelight terminal, electric power system optical-fibre channel, transformer station's sidelight terminal, power remote slave, execution respective wheel secondary line by central controller according to round, the dispatching of power netwoks person on duty can be according to the needs of electrical network situation, utilize central controller to realize the remote control operation, carry out the instruction that higher level dispatching of power netwoks person presses limited load fast according to round; Simultaneously also can configure the power consumption index higher limit that higher level dispatching of power netwoks person distributes to this area earlier by the keyboard input circuit, after comparing, send the pressure limited load instruction that a certain round of disconnection goes out wiretap from each transformer station of trend by central controller with the used load instantaneous value in this locality.This device can make the dispatching of power netwoks person on duty carry out the instruction that electrical network is pressed limited load accurately and quickly, alleviate dispatching of power netwoks person's work load, improve the grid automation management level, be applicable to province, city, the operational management work of dispatching of power netwoks at county level mechanism, can realize the intelligent management of electrical network.

Description of drawings

Fig. 1 is a schematic block circuit diagram of the present utility model;

Fig. 2 is the schematic block circuit diagram of central controller in the utility model;

Fig. 3 is the circuit diagram of performance element circuit in the utility model.

Embodiment

As shown in Figure 1 and Figure 2, the utility model electrical network presses the limited load centralized control system to comprise central controller, power remote main frame, power remote slave, dispatching of power netwoks sidelight terminal, electric power system optical-fibre channel, transformer station's optical transceiver and performance element circuit, be that example is described in detail with A of transformer station and the B of transformer station in the present embodiment, wherein the power remote main frame all has been the ripe technical equipment of using to the center-aisle network link of power remote slave A, power remote slave B.Wherein central controller comprises CPU, real-time power network signal acquisition circuit, round button, keyboard input circuit, display circuit, the signal output part of real-time power network signal acquisition circuit is connected with the signal input part of CPU, the signal input part of CPU is connected with the keyboard input circuit, and the signal output part of CPU is connected with display circuit.The signal input part of CPU is connected with the round button, and the round button comprises that the first round button (KA1, KB1), the second round button (KA2, KB2), third round time button (KA3, KB3) and round always add button (KN1, KN2, KN3).The signal output part of CPU is connected with the optical transceiver B of transformer station with the optical transceiver A of transformer station respectively by power remote main frame, dispatching of power netwoks sidelight terminal, electric power system optical-fibre channel successively, the signal output part of the optical transceiver A of transformer station, the optical transceiver B of transformer station is connected with the signal input part of performance element circuit B with performance element circuit A with power remote slave B by power remote slave A respectively, and described performance element circuit A and performance element circuit B include the first round performance element circuit, the second round performance element circuit, third round time performance element circuit.

The first round performance element circuit, the second round performance element circuit, third round time performance element circuit are relay control circuit, as shown in Figure 3, be exemplified as the first round performance element circuit and the second round performance element circuit of performance element circuit A, the tripping operation circuit of first round performance element circuit control is 2, circuit 1 tripping operation pressing plate and circuit 2 tripping operation pressing plate inputs, circuit 3 tripping operation pressing plates do not drop into, and can not trip; Second to take turns secondary line be 3: circuit 4, circuit 5, circuit 6 three-route roads tripping operation pressing plate all drop into.The first round performance element circuit comprises first relay, the coil J1 of first relay is connected on the wiring point of the corresponding KA1 signal output of survey, control binding post of power remote slave A special use, and the normally opened contact J1-1 of first relay is connected the trip(ping) circuit 1 of transformer operating power and transformer, trip(ping) circuit 2, trip(ping) circuit 3(trip(ping) circuit 3 pressing plates does not need input) between; The second round performance element circuit comprises second relay, the coil J2 of second relay is connected on the wiring point of the corresponding KA2 signal output of survey, control binding post of power remote slave A special use, and the normally opened contact J2-1 of second relay is connected between the trip(ping) circuit 4 of transformer operating power and transformer, trip(ping) circuit 5, the trip(ping) circuit 6.Carry out the first round signal and can start first relay, make the first relay normally open contact J1-1 closure, transformer station's A operating power is delivered to the line switching tripping operation of first round secondary line trip(ping) circuit 1 correspondence; Carry out the second round signal and can start second relay, make the normally opened contact J2-1 closure of second relay, transformer station's A operating power is delivered to the line switching tripping operation of the second round line tripping loop correspondence.Wherein third round time executive circuit is identical with the principle of the first round executive circuit; Performance element circuit B is identical with the principle of performance element circuit A.

As Fig. 1, Fig. 2, shown in Figure 3, the dispatching of power netwoks person on duty can operate according to the electrical network situation, also can be in advance with the real-time power load value input in this locality CPU, compare, judge automatic control local power grid load power by CPU, to realize the management work of intelligent electrical network.When needs manually control the electrical network of having jurisdiction over when pressing limited load: the signal that central controller sends sends instruction to the corresponding A of transformer station optical transceiver, power remote slave A and the B of transformer station optical transceiver, power remote slave B according to electric power telemechanical device transfer of data communication protocol respectively by power remote main frame, dispatching of power netwoks sidelight terminal, electric power system optical-fibre channel.Press the first round button KA1 in the central controller, power remote slave A can send the first round trip command to the trip(ping) circuit of the A of transformer station; Press the second round button KA2 in the central controller, power remote slave A can send the second round trip command to the trip(ping) circuit of the A of transformer station; Press third round time button KA3 in the central controller, power remote slave A can send third round time trip command to the A of transformer station.In like manner, press KB1, KB2, KB3 can send corresponding first round, second round, third round time by trip command from the power remote host B to the trip(ping) circuit of the B of transformer station.According to linchpin network load situation, need simultaneously to the A of transformer station, when the B of transformer station sends the trip command of corresponding round, the operator presses that first round always adds button KN1 in the central controller, can send the first round trip command simultaneously to the A of transformer station, the B of transformer station by power remote slave A and power remote slave B; Press that second round always adds button KN2 in the central controller, can send the second round trip command simultaneously to the A of transformer station, the B of transformer station by power remote slave A and power remote slave B; Press the inferior button KN3 that always adds of third round in the central controller, can send third round time trip command simultaneously to the A of transformer station, the B of transformer station by power remote slave A and power remote slave B.When needs control automatically the electrical network of having jurisdiction over when pressing limited load: configure the power consumption index higher limit that higher level dispatcher distributes to this area earlier by the keyboard input circuit, CPU compares power consumption index higher limit and the local real-time power network power load value of having jurisdiction over through internal logic circuit, judgement can start from the dynamic pressure limit network load controlled function of having jurisdiction over, when real-time power load value during greater than set point, the automatic output signal of CPU, according to electric power telemechanical device transfer of data communication protocol, by power remote slave A, power remote slave B is to the A of transformer station or the B of transformer station or simultaneously to the A of transformer station, the B of transformer station sends the trip command of corresponding round, equal set point until real-time power load value, make the electrical network power load of having jurisdiction over reach the power load value that upper level dispatching of power netwoks mechanism regulation local power grid uses automatically.

Claims

1. an electrical network is pressed the limited load centralized control system, it is characterized in that: comprise central controller, the power remote main frame, the power remote slave, dispatching of power netwoks sidelight terminal, the electric power system optical-fibre channel, transformer station's optical transceiver and performance element circuit, wherein central controller comprises CPU, the real-time power network signal acquisition circuit, the signal output part of real-time power network signal acquisition circuit is connected with the signal input part of CPU, the signal output part of CPU is successively by the power remote main frame, dispatching of power netwoks sidelight terminal, the electric power system optical-fibre channel is connected with the transformer station optical transceiver, and the signal output part of transformer station's optical transceiver is connected with the signal input part of performance element circuit by the power remote slave.

2. electrical network according to claim 1 is pressed the limited load centralized control system, it is characterized in that: the signal input part of described CPU is connected with the round button of control distant place transformer station line switching tripping operation, and the round button comprises that the first round button, the second round button, third round time button and round always add button.

3. electrical network according to claim 2 is pressed the limited load centralized control system, and it is characterized in that: the signal input part of described CPU is connected with keyboard circuit.

4. electrical network according to claim 3 is pressed the limited load centralized control system, and it is characterized in that: the signal output part of described CPU is connected with display circuit.

5. electrical network according to claim 4 is pressed the limited load centralized control system, it is characterized in that: described performance element circuit is a relay control circuit, the coil of relay is connected on the wiring point of survey, the output of control binding post respective signal of power remote slave special use, and the normally opened contact of relay is connected between the trip(ping) circuit of transformer operating power and transformer.