GB/T 40103-2021Technical requirment of connecting to power system for solar thermal power station (English PDF)

3.8 AGC Response Time

AGC response time refers to the time difference from the moment when the AGC command starts to change, to the moment when the actual load of the generator set starts to change, and the amplitude of variation exceeds the allowable range of the load static deviation, and no longer returns in the trend.

3.9 Cold Start-up

Cold start-up refers to the start-up of the solar thermal generator set when the metal temperature of the regulating stage of the high-pressure inner cylinder of the steam turbine is lower than 40% of the metal temperature at full load.

3.10 Warm Start-up

Warm start-up refers to the start-up of the solar thermal generator set when the metal temperature of the regulating stage of the high-pressure inner cylinder of the steam turbine is between 40% and 80% of the metal temperature at full load.

3.11 Hot Start-up

Hot start-up refers to the start-up of the solar thermal generator set when the metal temperature of the regulating stage of the high-pressure inner cylinder of the steam turbine is higher than 80% of the metal temperature at full load.

6.1 Regulation Capability

6.1.1 When the system frequency is within the variation range of 50.5 Hz ~ 48.5 Hz, the solar thermal generator set shall maintain stable operation.

6.1.2 When the system frequency drops to 48 Hz, the reduction in active power output of the solar thermal generator set shall not exceed 5% of the rated active power.

6.1.3 The solar thermal generator set shall be equipped with an automatic generation control (AGC) system, as well as the capability of active power regulation and the function of participating in closed-loop automatic power generation control of the power grid.

6.1.4 When the output active power of the solar thermal generator set is above 20% of the rated curve, it shall be able to achieve continuous and smooth regulation of the active power and the function of participating in the active power control of the system.

6.2 Automatic Generation Control

6.2.1 The requirements for the basic performance indexes of automatic generation control of the solar thermal generator set are as follows:

a) The AGC regulation rate shall not be less than 2% of the generator set's rated active power per minute;

b) AGC response time shall not be greater than 60 s;

c) AGC regulation error shall not be greater than 1% of the generator set's rated active power.

6.2.2 The AGC regulation range of the solar thermal generator set shall not be less than 20% ~ 100% of the generator set's rated active power.

6.2.3 The AGC the solar thermal generator set shall have the following two operation modes:

a) Fixed operation mode, in which, the generator set operates in accordance with the planned curve;

b) Regulation mode, in which, the generator set operates in accordance with the given load of the power grid.

6.2.4 The AGC of the solar thermal generator set shall be able to implement the manual and automatic undisturbed switching between the two control modes of "local control / remote control".

9.1 Basic Requirements

9.1.1 The secondary equipment and secondary systems of the solar thermal power station shall comply with the requirements of GB/T 14285, DL/Z 713 and DL/T 687.

9.1.2 The communication mode, transmission channel and information transmission between the solar thermal power station and the grid dispatching institution shall satisfy the stipulations of the grid dispatching institution, including the provision of remote measurement signals, remote communication signals, remote control signals, remote regulation signals and signals of other security automatic equipment, and the provision of signal modes and real-time requirements, etc.

9.2 Normal Operation Signal

The signals provided by the solar thermal power station to the grid dispatching institution shall at least include the following aspects:

a) The voltage, current, frequency, active power and reactive power of the grid connection point of the solar thermal power station;

b) The active power, reactive power and power generation of each generator set of the solar thermal power station;

c) The location of the circuit breaker and isolating switch at the grid connection point of the solar thermal power station;

d) The tap gear of the main boosting transformer of the solar thermal power station (on-load voltage regulation);

e) Input signal of primary frequency modulation;

f) AGC operating parameters, including the upper and lower limits of AGC adjustment, adjustment rate, and the state signals of "permission of AGC operation by generator set" and "AGC input / exit by generator set", etc.; […]